Fix file permissions

- switched to a sparse delta based map
- true lazy-loading to avoid any unneccessary allocations
- fixed windows management api

Makefile

@@ -19,9 +19,10 @@ CFLAGS_DEBUG :=\
 	-std=c++20 -Wall -Wextra \
 	-O0 -fno-inline -gsplit-dwarf \
 	-g -fno-omit-frame-pointer \
-	-fsanitize=address \
 	-Wno-unused-command-line-argument \
-	-I./include -I./libs -I/home/syed/main/crib/libs/mruby/include
+	-I./include -I./libs -I./libs/mruby/include
+
+# C_SANITIZER := -fsanitize=address
 
 CFLAGS_RELEASE :=\
 	-static --target=x86_64-linux-musl \
@@ -32,7 +33,7 @@ CFLAGS_RELEASE :=\
 	-fomit-frame-pointer -DNDEBUG -s \
 	-mllvm -vectorize-loops \
 	-Wno-unused-command-line-argument \
-	-I./include -I./libs -I/home/syed/main/crib/libs/mruby/include
+	-I./include -I./libs -I./libs/mruby/include
 
 PCH_CFLAGS_DEBUG := $(CFLAGS_DEBUG) -x c++-header
 PCH_CFLAGS_RELEASE := $(CFLAGS_RELEASE) -x c++-header
@@ -78,7 +79,7 @@ $(PCH_RELEASE): $(INCLUDE_DIR)/pch.h
 
 $(TARGET_DEBUG): $(PCH_DEBUG) $(OBJ_DEBUG) $(UNICODE_OBJ_DEBUG)
 	mkdir -p $(BIN_DIR)
-	$(CXX) $(CFLAGS_DEBUG) -o $@ $(OBJ_DEBUG) $(UNICODE_OBJ_DEBUG) $(LIBS_DEBUG)
+	$(CXX) $(CFLAGS_DEBUG) $(C_SANITIZER) -o $@ $(OBJ_DEBUG) $(UNICODE_OBJ_DEBUG) $(LIBS_DEBUG)
 
 $(TARGET_RELEASE): $(PCH_RELEASE) $(OBJ_RELEASE) $(UNICODE_OBJ_RELEASE)
 	mkdir -p $(BIN_DIR)

README.md

@@ -21,7 +21,7 @@ curl https://syedm.dev/crib | sh
 ```
 
 Currently only for Linux.<br>
-*Tested with arch linux and ubuntu and void*<br>
+*Tested with arch linux, ubuntu and void*<br>
 
 ## Building
 
@@ -134,6 +134,7 @@ crib ./filename.ext
 ```
 
 *If `filename.ext` does not exist, it will be created*<br>
+*memory usage is average case 10MB + 2x size of file*<br>
 
 ## Keybindings
 

TODO.md

@@ -2,45 +2,61 @@ Copyright 2025 Syed Daanish
 
 # TODO
 
-# memory usage for debug build (release build will be smaller by about 25%)
+- Fix bug where scroll up at top of screen first line jumps to bottom
-```
+
-8K   ->    13.2M
+- Make completions work with new system
-128K ->    13.2M (expected worst case 16.6M)
+- And factorize renderer into its own class
-128M ->   412.0M (expected worst case 2.3G)
+  - which is just managed by the renderer
-```
+  - and adjusment.cc will call it
+- which is reused by scrollers/ensurers too (for knowing screen wrapped end)
+- this will then allow inlay hints to be possible
+- and also make VAI easier to implement (probably as inlay hints)
+- and also allow code lens to work too
+- and an api to allow line skipping / virtual text which allows for folding logic as extention
+
+- Also time extentions and disable if they take too long / for larger files with options to force
 
-* Next few super long boring things to do
-* redo lsp threads such that no mutex needed for any rope stuff
-    - Also make the classes own the methods in lsp
-    - This will mean that parsers/renderers and keystrokes will not need to be individually locked
-    - And so it will be much faster
-    - At which point the main thread can also be blocked on user input or lsp responses and still be fast
-* Add a superclass for editor called Window (which can be popup or tiled)
-* Add a recursive tiling class for windows
-* Handled by a single renderer that calls and renders each window
-    - And a bg if no window open
-* Make editor's functions into its own methods (classify it)
-    - While at it
-        - Seperate system functions into a class that branches to support local / ssh / server modes.
-        - Even lsp shouldnt be directly controlled because it can branch on local and server modes
-    - Redo hooks as a engine of its own.
-    - And factorize renderer into its own class (and make it just return an array of the render without knowing teh x,y)
-        - which is just managed by the renderer
-    - which is reused by scrollers/ensurers too
-    - this will then allow inlay hints to be possible
-    - and also make VAI easier to implement
 * Allow keybinds to be set in ruby
 
-* then the fun part:
+* ruby file for project specific runs alongside any system wide ones
+
+- Seperate system functions into a class that branches to support local / ssh / server modes.
+- Even lsp shouldnt be directly controlled because it can branch on local and server modes
+  - check libssh2 or child process stuff for remote editing (remote mode)
+  - Thick and thin mode (server mode) (through ssh or port) (for website only port + webhook)
+    - thin mode only shares screen diffing over the network - uses server settings / themes / shell
+      - only one user connects at a time
+      - provides data as a websocket with tui or gui/online modes where tui shares diffing as is (can be connected to by gui or website)
+      - and gui/online modes try to (if not then render onto a canvas) forward window.render_gui() and dedicated windowing system (i.e windowing is html divs)
+      - and window.render_gui() returns a markup code (custom markup)
+        - and for events i could either leave tui as-is and for markup have special event handling or i
+        - implement the widget system in both and have the same event handling then
+      - actually for true cross platform i need to make a ui lib with widgets etc. so it is workable on all platforms (so they all need only a single ui lib)
+    - thick only shared fileio and lsp data with local used for all else - uses local settings / themes
+      - multiple users connect at once but maybe either make them not be allowed to open same file or make vscode like multiediting (unsure how exactly)
+      - they all share same lsp instances
+      - they all have the same shell access
+    - allow having an instance that forwards thick mode to thin mode (to connect online mode to a thick server for code collaboration)
+
 * Then allow ruby code to create and handle windows as extentions
 * Then 3 inbuilt extentions being file manager, theme picker, tab selector
 
+* make another tile type called tile tabbed that has a tab switcher and shows only one of its children at once
+* it takes focus and takes some keybinds for switching and forwards the rest (it also forwards the info and adds one for itself - the selected/total tabs)
+* also implement info strings for all the stuff that take focus
+
+* Mode is a feild on a editor and there is no global "mode system" except in editors (enxtentions do their own thing)
+  - make mode normal and not atomic if it is truly unused across threads
+  - this means keybinds can be set to use the editor as insert mode only and so behave like vscode
+
+* split lsp stuff into multiple files (not a monolithic class as it is now)
 * Extentions can also be used as file openers (for like databases . diffing . images . audio etc)
 * Local cache for state management (like undo history, cursor positions etc) (location can be set in config)
 * make sure to write inbuilt extentions in cpp and not ruby
 * also move default bar and clipboard back into cpp
 * all lsp popups are no longer their own classes but instead windows (extention like) in popup mode
 
+* also **fix click handling to send mouse unclick to the same focus window as the click And also for drag to be same as the starter**
 * skip opening binary files
 * apply themeing in bg log bar lsp popus etc. to keep visual consistency
 * searching/replace/Multi-Cursor (for just one lsp command for all) with pcre2 with regex (started by a slash) (disabled for large files)
@@ -52,10 +68,10 @@ Copyright 2025 Syed Daanish
 * Add a file picker suggestion while typing a path (including stuff like ~ and .. and $HOME etc)
 * allow opening directory after filemanger is sorted out.
 * commands to:
-    change pwd
+  change pwd
-    load a rb file
+  load a rb file
-    run a ruby command
+  run a ruby command
-    close a window etc.
+  close a window etc.
 * [ ] Add mgems for most common things and a ruby library to allow combining true ruby with mruby
 * add command to set and use a file type at runtime
 * [ ] color alpha in ini files
@@ -63,12 +79,12 @@ Copyright 2025 Syed Daanish
 * [ ] **LSP Bug:** Check why `fish-lsp` is behaving so off with completions filtering.
 * [ ] **Line move:** fix the move line functions to work without the calculations from folds as folds are removed.
 * [ ] **Editor Indentation Fix:** - Main : merger indentation with the parser for more accurate results.
-    * [ ] Ignore comments/strings from parser when auto-indenting.
+  - [ ] Ignore comments/strings from parser when auto-indenting.
-    * [ ] Support for stuff like bash \ and math operators in other languages and comma and line starting with a dot (like in ruby)
+  - [ ] Support for stuff like bash \ and math operators in other languages and comma and line starting with a dot (like in ruby)
-          etc.
+        etc.
 * [ ] **Readme:** Update readme to show ruby based config in detail.
 * [ ] **UI Refinement:**
-    * [ ] Finish autocomplete box style functions.
+  - [ ] Finish autocomplete box style functions.
 * [ ] **Documentation UI:** Capture `Ctrl+h` / `Ctrl+l` for scrolling documentation windows.
 * Cap line_tree data limit for large files and just store about a thousand previous lines maybe? (lazily loaded)
 
@@ -81,17 +97,17 @@ Copyright 2025 Syed Daanish
 * allow flushing functions in ruby to tell c++ to refresh keybinds/themes etc.
 
 * [ ] **LSP:**
-    support snippets in completion properly
+      support snippets in completion properly
-    check::
+      check::
-        pull diagnostics for ruby-lsp
+      pull diagnostics for ruby-lsp
-        lsp selection range - use to highlight start / end of range maybe?
+      lsp selection range - use to highlight start / end of range maybe?
-        goto definiton
+      goto definiton
-        signature help
+      signature help
-        document symbol for the top bar maybe? (or workspace symbol)
+      document symbol for the top bar maybe? (or workspace symbol)
-        also setup workspaces
+      also setup workspaces
-        Semantic highlighting
+      Semantic highlighting
-        Quick fixes
+      Quick fixes
-        Rename symbols
+      Rename symbols
 
 * Allow ruby to config lsp capabilities
 
@@ -113,47 +129,108 @@ Copyright 2025 Syed Daanish
 
 * [ ] **Auto brace selection:** Add support for auto brace selection.
 
-* [ ] **Tree-sitter Indent:** Attempt to allow Tree-sitter to handle indentation if possible.
-
 ### UX
 
-* [ ] **Completion Filtering:**
+- [ ] **Completion Filtering:**
-    * [ ] Stop filtering case-sensitive.
+  - [ ] Stop filtering case-sensitive.
-    * [ ] Normalize completion edits if local filtering is used.
+  - [ ] Normalize completion edits if local filtering is used.
 
-* [ ] **Basic Autocomplete:** Keep a list of words in the current buffer for non-LSP fallback.
+- [ ] **Basic Autocomplete:** Keep a list of words in the current buffer for non-LSP fallback.
 
-### Major Features
+### Features
 
-* [ ] **Search & Replace:**
+- [ ] **Search & Replace:**
-    * [ ] Add Search/Replace UI.
+  - [ ] Add Search/Replace UI.
-    * [ ] Support capture groups (`$1`, `$2`) or allow Perl regex directly.
+  - [ ] Support capture groups (`$1`, `$2`) or allow Perl regex directly.
-    * [ ] Ensure virtual cursors are included in search positions.
+  - [ ] Ensure virtual cursors are included in search positions.
 
-* [ ] **Multi-Cursor:**
+- [ ] **Multi-Cursor:**
-    * [ ] Add virtual cursor support (edits apply to all locations).
+  - [ ] Add virtual cursor support (edits apply to all locations).
-    * [ ] Add `Alt+Click` to set multiple cursors.
+  - [ ] Add `Alt+Click` to set multiple cursors.
-    * [ ] Allow search and place cursor at all matches.
+  - [ ] Allow search and place cursor at all matches.
 
-* [ ] **Block Selection:**
+- [ ] **Block Selection:**
-    * [ ] Double-clicking a bracket selects the whole block and sets mode to `WORD`.
+  - [ ] Double-clicking a bracket selects the whole block and sets mode to `WORD`.
 
 ### Visuals, UI & Extensions?
 
-* [ ] Add color picker/palette (as a floating extention).
+- [ ] Add color picker/palette (as a floating extention).
 
-* [ ] **Git:** Add Git integration (status, diffs).
+- [ ] **Git:** Add Git integration (status, diffs).
-* [ ] **AI/Snippets:**
+- [ ] **AI/Snippets:**
-    * [ ] Add snippets support (LuaSnip/VSnip style).
+  - [ ] Add snippets support (LuaSnip/VSnip style).
-    * [ ] Add Codeium/Copilot support (using VAI virtual text) as a test phase.
+  - [ ] Add Codeium/Copilot support (using VAI virtual text) as a test phase.
-
-* [ ] **SQL:** Add SQL support (Viewer and Basic Editor) (as ruby extension).
-* [ ] **Prolly?:** Add Splash Screen / Minigame.
 
+- [ ] **SQL:** Add SQL support (Viewer and Basic Editor) (as ruby extension).
+- [ ] **Prolly?:** Add Splash Screen / Minigame.
 
 ### Unimportant optimizations
 
-* [ ] **Performance:**
+- [ ] **Performance:**
-    * [ ] Switch JSON parser to `RapidJSON` (or similar high-performance lib).
+  - [ ] Switch JSON parser to `RapidJSON` (or similar high-performance lib).
-    * [ ] Decrease usage of `std::string` in UI, LSP, warnings etc.
+  - [ ] Decrease usage of `std::string` in UI, LSP, warnings etc.
-    * [ ] Also for vectors into managed memory especially for completions/lsp-stuff.
+  - [ ] Also for vectors into managed memory especially for completions/lsp-stuff.
+
+<!-- The pits of hell: -->
+<!-- * Replace perfectly working superfast rope with a structure that stores for small files everything -->
+<!--     - but for large ones it stores only what the user viewed / edited (by line number) -->
+<!--     - the rest is from the disk and not entirely loaded into memory (keep as option maybe they want everything in memory?) -->
+<!--     - also for the line mode still go through entire file to get and store line offsets -->
+<!--     - also it stores everything prolly still as rope tho (rope of lines) (or sparse map) -->
+<!--     - it stores the line text as-is which is only unicode / crlf normalized during usage -->
+
+whyy is visible returnint x1,y2 and x2, 2y2 instead of x1,y1 and x2,y2
+
+Render H: 1, Cursor: 0,0, Visible: 0,26 - 0,52
+Render H: 2, Cursor: 0,0, Visible: 1,0 - 1,0
+Render H: 3, Cursor: 0,0, Visible: 2,30 - 2,60
+Render H: 4, Cursor: 0,0, Visible: 3,36 - 3,72
+Render H: 5, Cursor: 0,0, Visible: 4,32 - 4,64
+Render H: 6, Cursor: 0,0, Visible: 5,40 - 5,80
+Render H: 7, Cursor: 0,0, Visible: 6,11 - 6,22
+Render H: 8, Cursor: 0,0, Visible: 7,3 - 7,6
+Render H: 9, Cursor: 0,0, Visible: 8,19 - 8,38
+Render H: 10, Cursor: 0,0, Visible: 9,76 - 9,152
+Render H: 11, Cursor: 0,0, Visible: 10,50 - 10,100
+Render H: 12, Cursor: 0,0, Visible: 11,29 - 11,58
+Render H: 13, Cursor: 0,0, Visible: 12,49 - 12,98
+Render H: 14, Cursor: 0,0, Visible: 13,32 - 13,64
+Render H: 15, Cursor: 0,0, Visible: 14,30 - 14,60
+Render H: 16, Cursor: 0,0, Visible: 15,56 - 15,112
+Render H: 17, Cursor: 0,0, Visible: 16,42 - 16,84
+Render H: 18, Cursor: 0,0, Visible: 17,20 - 17,40
+Render H: 19, Cursor: 0,0, Visible: 18,31 - 18,62
+Render H: 20, Cursor: 0,0, Visible: 19,77 - 19,154
+Render H: 21, Cursor: 0,0, Visible: 20,77 - 20,154
+Render H: 22, Cursor: 0,0, Visible: 21,44 - 21,88
+Render H: 23, Cursor: 0,0, Visible: 22,56 - 22,112
+Render H: 24, Cursor: 0,0, Visible: 23,13 - 23,26
+Render H: 25, Cursor: 0,0, Visible: 24,3 - 24,6
+Render H: 26, Cursor: 0,0, Visible: 25,24 - 25,48
+Render H: 27, Cursor: 0,0, Visible: 26,32 - 26,64
+Render H: 28, Cursor: 0,0, Visible: 27,38 - 27,76
+Render H: 29, Cursor: 0,0, Visible: 28,1 - 28,2
+Render H: 30, Cursor: 0,0, Visible: 29,0 - 29,0
+Render H: 31, Cursor: 0,0, Visible: 30,30 - 30,60
+Render H: 32, Cursor: 0,0, Visible: 31,19 - 31,38
+Render H: 33, Cursor: 0,0, Visible: 32,76 - 32,152
+Render H: 34, Cursor: 0,0, Visible: 33,50 - 33,100
+Render H: 35, Cursor: 0,0, Visible: 34,36 - 34,72
+Render H: 36, Cursor: 0,0, Visible: 35,66 - 35,132
+Render H: 37, Cursor: 0,0, Visible: 36,12 - 36,24
+Render H: 38, Cursor: 0,0, Visible: 37,13 - 37,26
+Render H: 39, Cursor: 0,0, Visible: 38,17 - 38,34
+Render H: 40, Cursor: 0,0, Visible: 39,37 - 39,74
+Render H: 41, Cursor: 0,0, Visible: 40,16 - 40,32
+Render H: 42, Cursor: 0,0, Visible: 41,23 - 41,46
+Render H: 43, Cursor: 0,0, Visible: 42,15 - 42,30
+Render H: 44, Cursor: 0,0, Visible: 43,13 - 43,26
+Render H: 45, Cursor: 0,0, Visible: 44,5 - 44,10
+Render H: 46, Cursor: 0,0, Visible: 45,41 - 45,82
+Render H: 47, Cursor: 0,0, Visible: 46,12 - 46,24
+Render H: 48, Cursor: 0,0, Visible: 47,22 - 47,44
+Render H: 49, Cursor: 0,0, Visible: 48,24 - 48,48
+Render H: 50, Cursor: 0,0, Visible: 49,28 - 49,56
+Render H: 51, Cursor: 0,0, Visible: 50,26 - 50,52
+Render H: 52, Cursor: 0,0, Visible: 51,20 - 51,40
+Render H: 53, Cursor: 0,0, Visible: 52,74 - 52,148

include/editor/completions.h

@@ -1,46 +0,0 @@
-#ifndef EDITOR_COMPLETIONS_H
-#define EDITOR_COMPLETIONS_H
-
-#include "pch.h"
-#include "ui/completionbox.h"
-#include "ui/hover.h"
-#include "utils/utils.h"
-
-struct CompletionItem {
-  std::string label;
-  uint8_t kind;
-  std::optional<std::string> detail;
-  std::optional<std::string> documentation;
-  bool is_markup = false;
-  bool deprecated = false;
-  bool asis = true;
-  std::string sort;
-  std::string filter;
-  bool snippet = false;
-  std::vector<TextEdit> edits;
-  json original;
-  std::vector<char> end_chars;
-};
-
-struct CompletionSession {
-  std::shared_mutex mtx;
-  bool active = false;
-  Coord hook;
-  std::optional<std::string> prefix;
-  uint32_t select = 0;
-  uint32_t scroll = 0;
-  std::vector<CompletionItem> items;
-  std::vector<uint32_t> visible;
-  bool complete = true;
-  std::optional<char> trigger_char;
-  uint8_t trigger = 0;
-  CompletionBox box;
-  HoverBox hover;
-  uint32_t doc = UINT32_MAX;
-  std::atomic<bool> hover_dirty = false;
-  int version;
-
-  CompletionSession() : box(this) {}
-};
-
-#endif

include/editor/editor.h

@@ -1,16 +1,18 @@
 #ifndef EDITOR_H
 #define EDITOR_H
 
-#include "editor/completions.h"
+#include "editor/decl.h"
+#include "editor/hooks.h"
 #include "editor/indents.h"
+#include "editor/visual.h"
+#include "extentions/diagnostics.h"
+#include "extentions/hover.h"
 #include "io/knot.h"
 #include "io/sysio.h"
 #include "syntax/extras.h"
 #include "syntax/parser.h"
-#include "ui/completionbox.h"
-#include "ui/diagnostics.h"
-#include "ui/hover.h"
 #include "utils/utils.h"
+#include "windows/decl.h"
 
 #define CHAR 0
 #define WORD 1
@@ -19,144 +21,149 @@
 #define EXTRA_META 2
 #define INDENT_WIDTH 2
 
-struct Editor {
+struct Editor : Window {
-  std::string filename;
+  std::string filename = "";
-  std::string uri;
+  std::string uri = "";
-  Knot *root;
+  Knot *root = nullptr;
-  std::shared_mutex knot_mtx;
+  Coord cursor = {0, 0};
-  Coord cursor;
+  uint32_t cursor_preffered = 0;
-  uint32_t cursor_preffered;
+  Coord selection = {0, 0};
-  Coord selection;
+  bool selection_active = false;
-  bool selection_active;
+  bool unix_eol = true;
-  bool unix_eol;
+  int selection_type = 0;
-  int selection_type;
+  Coord size = {0, 0};
-  Coord position;
+  Coord scroll = {0, 0};
-  Coord size;
+  Language lang = {};
-  Coord scroll;
+  bool jumper_set = false;
-  Language lang;
+  std::vector<VWarn> warnings = {};
-  uint32_t hooks[94];
+  bool warnings_dirty = false;
-  bool jumper_set;
+  VAI ai = {};
-  std::shared_mutex v_mtx;
-  std::vector<VWarn> warnings;
-  bool warnings_dirty;
-  VAI ai;
   std::shared_mutex lsp_mtx;
-  std::shared_ptr<struct LSPInstance> lsp;
+  std::atomic<struct LSPInstance *> lsp = nullptr;
-  bool hover_active;
+  HoverBox *hover_popup = init_hover();
-  HoverBox hover;
+  DiagnosticBox *diagnostic_popup = init_diagnostic();
-  bool diagnostics_active;
-  DiagnosticBox diagnostics;
   std::atomic<int> lsp_version = 1;
-  CompletionSession completion;
+  IndentationEngine indents = {};
-  IndentationEngine indents;
+  HookEngine hooks = {};
-  Parser *parser;
+  Parser *parser = nullptr;
-  ExtraHighlighter extra_hl;
+  ExtraHighlighter extra_hl = {};
-  bool is_css_color;
+  bool is_css_color = false;
-};
 
-Editor *new_editor(const char *filename_arg, Coord position, Coord size,
+  Editor(const char *filename_arg, uint8_t eol);
-                   uint8_t eol);
+  ~Editor();
-void save_file(Editor *editor);
-void free_editor(Editor *editor);
-void render_editor(Editor *editor);
-void cursor_up(Editor *editor, uint32_t number);
-void cursor_down(Editor *editor, uint32_t number);
-Coord move_left(Editor *editor, Coord cursor, uint32_t number);
-Coord move_right(Editor *editor, Coord cursor, uint32_t number);
-void cursor_left(Editor *editor, uint32_t number);
-void cursor_right(Editor *editor, uint32_t number);
-void scroll_up(Editor *editor, int32_t number);
-void scroll_down(Editor *editor, uint32_t number);
-void ensure_cursor(Editor *editor);
-void ensure_scroll(Editor *editor);
-void handle_editor_event(Editor *editor, KeyEvent event);
-void edit_erase(Editor *editor, Coord pos, int64_t len);
-void edit_insert(Editor *editor, Coord pos, char *data, uint32_t len);
-void edit_replace(Editor *editor, Coord start, Coord end, const char *text,
-                  uint32_t len);
-Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y);
-char *get_selection(Editor *editor, uint32_t *out_len, Coord *out_start);
-void selection_bounds(Editor *editor, Coord *out_start, Coord *out_end);
-void editor_worker(Editor *editor);
-void move_line_down(Editor *editor);
-void move_line_up(Editor *editor);
-void word_boundaries(Editor *editor, Coord coord, uint32_t *prev_col,
-                     uint32_t *next_col, uint32_t *prev_clusters,
-                     uint32_t *next_clusters);
-void word_boundaries_exclusive(Editor *editor, Coord coord, uint32_t *prev_col,
-                               uint32_t *next_col);
-void editor_lsp_handle(Editor *editor, json msg);
-void apply_lsp_edits(Editor *editor, std::vector<TextEdit> edits, bool move);
-void completion_resolve_doc(Editor *editor);
-void complete_accept(Editor *editor);
-void complete_next(Editor *editor);
-void complete_prev(Editor *editor);
-void complete_select(Editor *editor, uint8_t index);
-void handle_completion(Editor *editor, KeyEvent event);
 
-inline void apply_hook_insertion(Editor *editor, uint32_t line, uint32_t rows) {
+  void render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) override;
-  for (auto &hook : editor->hooks)
+  void handle_event(KeyEvent event) override;
-    if (hook > line)
+  void handle_click(KeyEvent event, Coord size) override;
-      hook += rows;
+  void handle_command(std::string &command) override;
-}
+  void work() override;
+  std::array<std::string, 5> bar_info() override { return {}; };
 
-inline void apply_hook_deletion(Editor *editor, uint32_t removal_start,
+  void save();
-                                uint32_t removal_end) {
+  void cursor_up(uint32_t number);
-  for (auto &hook : editor->hooks)
+  void cursor_down(uint32_t number);
-    if (hook > removal_start)
+  void cursor_left(uint32_t number);
-      hook -= removal_end - removal_start + 1;
+  void cursor_right(uint32_t number);
-}
+  void move_line_down();
+  void move_line_up();
 
-inline static void utf8_normalize_edit(Editor *editor, TextEdit *edit) {
+  void scroll_up(uint32_t number);
-  std::shared_lock lock(editor->knot_mtx);
+  void scroll_down(uint32_t number);
-  if (edit->start.row > editor->root->line_count) {
+  void ensure_cursor();
-    edit->start.row = editor->root->line_count;
+  void ensure_scroll();
-    edit->start.col = UINT32_MAX;
+
-  }
+  void edit_erase(Coord pos, int64_t len);
-  if (edit->end.row > editor->root->line_count) {
+  void edit_insert(Coord pos, char *data, uint32_t len);
-    edit->end.row = editor->root->line_count;
+  void edit_replace(Coord start, Coord end, const char *text, uint32_t len);
-    edit->end.col = UINT32_MAX;
+
-  }
+  Coord click_coord(uint32_t x, uint32_t y);
-  LineIterator *it = begin_l_iter(editor->root, edit->start.row);
+
-  if (!it)
+  char *get_selection(uint32_t *out_len, Coord *out_start);
-    return;
+  void selection_bounds(Coord *out_start, Coord *out_end);
-  uint32_t len;
+
-  char *line = next_line(it, &len);
+  void insert_str(char *c, uint32_t len);
-  if (!line) {
+  void insert_char(char c);
+  void normal_mode();
+  void backspace_edit();
+  void delete_prev_word();
+  void delete_next_word();
+  void cursor_prev_word();
+  void cursor_next_word();
+  void select_all();
+  void fetch_lsp_hover();
+  void indent_current_line();
+  void dedent_current_line();
+  void indent_selection();
+  void dedent_selection();
+  void paste();
+  void copy();
+  void cut();
+
+  void lsp_handle(json msg);
+  void apply_lsp_edits(std::vector<TextEdit> edits, bool move);
+
+  // Not used by core editor, but can be used by
+  // extentions (due to cursor movement complexity)
+  void format_full(int version); 
+
+  Coord move_left(Coord cursor, uint32_t number);
+  Coord move_right(Coord cursor, uint32_t number);
+
+  void word_boundaries(Coord coord, uint32_t *prev_col, uint32_t *next_col,
+                       uint32_t *prev_clusters, uint32_t *next_clusters);
+  void word_boundaries_exclusive(Coord coord, uint32_t *prev_col,
+                                 uint32_t *next_col);
+
+  void utf8_normalize_edit(TextEdit *edit) {
+    if (edit->start.row > this->root->line_count) {
+      edit->start.row = this->root->line_count;
+      edit->start.col = UINT32_MAX;
+    }
+    if (edit->end.row > this->root->line_count) {
+      edit->end.row = this->root->line_count;
+      edit->end.col = UINT32_MAX;
+    }
+    LineIterator *it = begin_l_iter(this->root, edit->start.row);
+    if (!it)
+      return;
+    uint32_t len;
+    char *line = next_line(it, &len);
+    if (!line) {
+      free(it->buffer);
+      free(it);
+      return;
+    }
+    if (edit->start.col < len)
+      edit->start.col = utf16_offset_to_utf8(line, len, edit->start.col);
+    else
+      edit->start.col = len;
+    if (edit->end.row == edit->start.row) {
+      if (edit->end.col < len)
+        edit->end.col = utf16_offset_to_utf8(line, len, edit->end.col);
+      else
+        edit->end.col = len;
+      free(it->buffer);
+      free(it);
+      return;
+    }
     free(it->buffer);
     free(it);
-    return;
+    it = begin_l_iter(this->root, edit->end.row);
-  }
+    if (!it)
-  if (edit->start.col < len)
+      return;
-    edit->start.col = utf16_offset_to_utf8(line, len, edit->start.col);
+    line = next_line(it, &len);
-  else
+    if (!line) {
-    edit->start.col = len;
+      free(it->buffer);
-  if (edit->end.row == edit->start.row) {
+      free(it);
+      return;
+    }
     if (edit->end.col < len)
       edit->end.col = utf16_offset_to_utf8(line, len, edit->end.col);
     else
       edit->end.col = len;
     free(it->buffer);
     free(it);
-    return;
   }
-  free(it->buffer);
+};
-  free(it);
-  it = begin_l_iter(editor->root, edit->end.row);
-  if (!it)
-    return;
-  line = next_line(it, &len);
-  if (!line) {
-    free(it->buffer);
-    free(it);
-    return;
-  }
-  if (edit->end.col < len)
-    edit->end.col = utf16_offset_to_utf8(line, len, edit->end.col);
-  else
-    edit->end.col = len;
-  free(it->buffer);
-  free(it);
-}
 
 #endif

include/editor/helpers.h

@@ -3,24 +3,4 @@
 
 #include "editor/editor.h"
 
-void insert_str(Editor *editor, char *c, uint32_t len);
-void insert_char(Editor *editor, char c);
-void normal_mode(Editor *editor);
-void backspace_edit(Editor *editor);
-void delete_prev_word(Editor *editor);
-void delete_next_word(Editor *editor);
-void clear_hooks_at_line(Editor *editor, uint32_t line);
-void cursor_prev_word(Editor *editor);
-void cursor_next_word(Editor *editor);
-void select_all(Editor *editor);
-void fetch_lsp_hover(Editor *editor);
-void handle_mouse(Editor *editor, KeyEvent event);
-void indent_current_line(Editor *editor);
-void dedent_current_line(Editor *editor);
-void indent_selection(Editor *editor);
-void dedent_selection(Editor *editor);
-void paste(Editor *editor);
-void copy(Editor *editor);
-void cut(Editor *editor);
-
 #endif

include/editor/hooks.h

@@ -0,0 +1,91 @@
+#ifndef EDITOR_HOOKS_H
+#define EDITOR_HOOKS_H
+
+#include "utils/utils.h"
+
+struct HookEngine {
+  uint32_t hooks[94];
+  std::vector<std::pair<uint32_t, char>> v;
+  std::vector<std::pair<uint32_t, char>>::iterator it;
+
+  HookEngine() {
+    for (int i = 0; i < 94; i++)
+      hooks[i] = UINT32_MAX;
+    v.reserve(94);
+  }
+
+  inline void edit(uint32_t line, uint32_t removed_rows,
+                   uint32_t inserted_rows) {
+
+    int64_t delta = (int64_t)inserted_rows - (int64_t)removed_rows;
+    for (int i = 0; i < 94; i++) {
+      uint32_t &h = hooks[i];
+      if (h == UINT32_MAX)
+        continue;
+      if (h < line)
+        continue;
+      if (removed_rows > 0 && h < line + removed_rows) {
+        h = UINT32_MAX;
+        continue;
+      }
+      h = (uint32_t)((int64_t)h + delta);
+    }
+  }
+
+  inline void set(char c, uint32_t line) {
+    if (c < '!' || c > '~')
+      return;
+    int idx = c - '!';
+    for (int i = 0; i < 94; i++) {
+      if (hooks[i] == line) {
+        hooks[i] = UINT32_MAX;
+        break;
+      }
+    }
+    hooks[idx] = line;
+  }
+
+  inline bool get(char c, uint32_t *out_line) const {
+    if (c < '!' || c > '~')
+      return false;
+    uint32_t h = hooks[c - '!'];
+    if (h == UINT32_MAX)
+      return false;
+    *out_line = h;
+    return true;
+  }
+
+  inline void clear_line(uint32_t line) {
+    for (int i = 0; i < 94; i++)
+      if (hooks[i] == line)
+        hooks[i] = UINT32_MAX;
+  }
+
+  inline void clear(char c) {
+    if (c < '!' || c > '~')
+      return;
+    hooks[c - '!'] = UINT32_MAX;
+  }
+
+  void start_iter(uint32_t scroll_line) {
+    for (int i = 0; i < 94; i++)
+      if (hooks[i] != UINT32_MAX)
+        v.push_back({hooks[i], (char)('!' + i)});
+    std::sort(v.begin(), v.end(),
+              [](const auto &a, const auto &b) { return a.first < b.first; });
+    it = std::lower_bound(
+        v.begin(), v.end(), scroll_line,
+        [](const auto &p, uint32_t line) { return p.first < line; });
+  }
+
+  char next(uint32_t line_index) {
+    if (it != v.end() && it->first == line_index) {
+      char c = it->second;
+      it++;
+      return c;
+    }
+    return '\0';
+  }
+};
+
+#endif

include/editor/visual.h

@@ -0,0 +1,113 @@
+#include "editor/decl.h"
+#include "io/knot.h"
+#include "io/sysio.h"
+#include "utils/utils.h"
+
+struct GraphemeIterator {
+  char *line{nullptr};
+  uint32_t len{0};
+
+  GraphemeIterator(char *line, uint32_t len) : line(line), len(len) {}
+
+  char *next(uint32_t *o_len, uint32_t *o_width) {
+    if (!line || len == 0)
+      return nullptr;
+    char *cur = line;
+    uint32_t g = grapheme_next_character_break_utf8(cur, len);
+    if (o_width)
+      *o_width = display_width(cur, g);
+    if (o_len)
+      *o_len = g;
+    line += g;
+    len -= g;
+    return cur;
+  }
+};
+
+struct VisualIterator {
+  LineIterator *it{nullptr};
+  uint32_t line_index{UINT32_MAX};
+  uint32_t offset{0};
+  uint32_t len{0};
+  bool first{true};
+  char *line{nullptr};
+  uint32_t render_width{io::cols};
+  std::stack<std::pair<Coord, Coord>> prev_stack;
+
+  VisualIterator(Knot *root, Coord pos, uint32_t width)
+      : it(begin_l_iter(root, pos.row)), line_index(pos.row - 1),
+        offset(pos.col), render_width(width) {}
+
+  std::pair<Coord, Coord> prev() {
+    if (!it)
+      return {{UINT32_MAX, UINT32_MAX}, {UINT32_MAX, UINT32_MAX}};
+    if (prev_stack.empty())
+      return _prev();
+    auto ret = prev_stack.top();
+    offset = ret.first.col;
+    prev_stack.pop();
+    return ret;
+  }
+
+  std::pair<Coord, Coord> _prev() {
+    if (!it)
+      return {{UINT32_MAX, UINT32_MAX}, {UINT32_MAX, UINT32_MAX}};
+    line_index--;
+    line = prev_line(it, &len);
+    if (!line)
+      return {{UINT32_MAX, UINT32_MAX}, {UINT32_MAX, UINT32_MAX}};
+    if (len > 0 && line[len - 1] == '\n')
+      len--;
+    offset = first ? offset : 0;
+    first = false;
+    GraphemeIterator g(line + offset, len - offset);
+    uint32_t o_len, o_width, rendered = 0, advance = 0;
+    while (g.next(&o_len, &o_width)) {
+      if (rendered + o_width > render_width) {
+        prev_stack.push({{line_index, offset}, {line_index, offset + advance}});
+        offset += advance;
+        rendered = 0;
+        advance = 0;
+      }
+      advance += o_len;
+      rendered += o_width;
+    }
+    return {{line_index, offset}, {line_index, offset + advance}};
+  }
+
+  std::pair<Coord, Coord> next() {
+    if (!it)
+      return {{UINT32_MAX, UINT32_MAX}, {UINT32_MAX, UINT32_MAX}};
+    if (!line) {
+      line_index++;
+      line = next_line(it, &len);
+      if (!line)
+        return {{UINT32_MAX, UINT32_MAX}, {UINT32_MAX, UINT32_MAX}};
+      if (len > 0 && line[len - 1] == '\n')
+        len--;
+      offset = first ? offset : 0;
+      first = false;
+    }
+    GraphemeIterator g(line + offset, len - offset);
+    uint32_t o_len, o_width, rendered = 0, advance = 0;
+    while (g.next(&o_len, &o_width)) {
+      if (rendered + o_width > render_width) {
+        offset += advance;
+        return {{line_index, offset - advance}, {line_index, offset}};
+      }
+      advance += o_len;
+      rendered += o_width;
+    }
+    offset += advance;
+    if (offset >= len)
+      line = nullptr;
+    return {{line_index, offset}, {line_index, offset + advance}};
+  }
+
+  ~VisualIterator() {
+    if (!it)
+      return;
+    free(it->buffer);
+    free(it);
+  }
+};

include/extentions/completions.h

@@ -0,0 +1,64 @@
+#ifndef EXTENTION_COMPLETION_H
+#define EXTENTION_COMPLETION_H
+
+#include "editor/decl.h"
+#include "io/sysio.h"
+#include "pch.h"
+#include "utils/utils.h"
+#include "windows/decl.h"
+
+struct CompletionItem {
+  std::string label;
+  uint8_t kind;
+  std::optional<std::string> detail;
+  std::optional<std::string> documentation;
+  bool is_markup = false;
+  bool deprecated = false;
+  bool asis = true;
+  std::string sort;
+  std::string filter;
+  bool snippet = false;
+  std::vector<TextEdit> edits;
+  json original;
+  std::vector<char> end_chars;
+};
+
+struct CompletionBox : Popup {
+  struct CompletionSession *session;
+  CompletionBox() { this->hidden = true; }
+  void render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) override;
+  void handle_click(KeyEvent, Coord) override { this->hidden = true; }
+  ~CompletionBox() {}
+};
+
+struct CompletionSession {
+  struct Editor *editor;
+  std::shared_mutex mtx;
+  bool active = false;
+  Coord hook;
+  uint32_t select = 0;
+  uint32_t scroll = 0;
+  std::vector<CompletionItem> items;
+  std::vector<uint32_t> visible;
+  bool complete = true;
+  std::optional<char> trigger_char;
+  uint8_t trigger = 0;
+  CompletionBox *box = nullptr;
+  uint32_t doc = UINT32_MAX;
+  std::atomic<bool> hover_dirty = false;
+  int version;
+
+  CompletionSession(Editor *editor) : editor(editor) {}
+  void resolve_doc();
+  void accept();
+  void next();
+  void prev();
+  void choose(uint8_t index);
+  void handle(KeyEvent event);
+};
+
+CompletionBox *init_completion_box(CompletionSession *session);
+void completion_request(Editor *editor);
+void completion_filter(Editor *editor);
+
+#endif

include/extentions/diagnostics.h

@@ -0,0 +1,22 @@
+#ifndef EXTENTION_DIAGNOSTICS_H
+#define EXTENTION_DIAGNOSTICS_H
+
+#include "editor/decl.h"
+#include "io/sysio.h"
+#include "pch.h"
+#include "utils/utils.h"
+#include "windows/decl.h"
+
+struct DiagnosticBox : Popup {
+  std::vector<VWarn> warnings;
+
+  DiagnosticBox() { this->hidden = true; }
+  void clear() { this->warnings.clear(); }
+  void render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) override;
+  void handle_click(KeyEvent, Coord) override { this->hidden = true; };
+  ~DiagnosticBox() {};
+};
+
+DiagnosticBox *init_diagnostic();
+
+#endif

include/extentions/hover.h

@@ -0,0 +1,37 @@
+#ifndef EXTENTION_HOVER_H
+#define EXTENTION_HOVER_H
+
+#include "io/sysio.h"
+#include "pch.h"
+#include "utils/utils.h"
+#include "windows/decl.h"
+
+struct HoverBox : Popup {
+  std::string text;
+  std::atomic<bool> is_markup;
+  uint32_t scroll_;
+  bool scroll_dirty;
+
+  HoverBox() : scroll_(0) { this->hidden = true; }
+  void clear() {
+    this->text = "";
+    this->hidden = true;
+    this->is_markup = false;
+    this->scroll_ = 0;
+    this->scroll_dirty = true;
+  }
+  void scroll(int32_t number);
+  void render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) override;
+  void handle_click(KeyEvent ev, Coord) override {
+    if (ev.mouse_button == SCROLL_BTN && ev.mouse_state == SCROLL) {
+      this->scroll(ev.mouse_direction == SCROLL_UP ? -1 : 1);
+      return;
+    }
+    this->hidden = true;
+  };
+  ~HoverBox() {};
+};
+
+HoverBox *init_hover();
+
+#endif

include/io/sysio.h

@@ -96,20 +96,19 @@ inline bool is_empty_cell(const ScreenCell &c) {
   return c.utf8.empty() || c.utf8 == " " || c.utf8 == "\x1b";
 }
 
+namespace io {
+extern std::vector<ScreenCell> new_screen;
+extern uint32_t rows, cols;
+extern bool show_cursor;
+extern std::vector<ScreenCell> old_screen;
+extern termios orig_termios;
+} // namespace io
+
 Coord start_screen();
 void end_screen();
-void update(uint32_t row, uint32_t col, std::string utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags);
-void update(uint32_t row, uint32_t col, const char *utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags);
-void update(uint32_t row, uint32_t col, std::string utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags, uint32_t ul_color);
-void update(uint32_t row, uint32_t col, const char *utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags, uint32_t ul_color);
 void set_cursor(uint8_t row, uint8_t col, uint32_t type,
                 bool show_cursor_param);
-void render();
+void io_render();
-Coord get_size();
 
 KeyEvent read_key();
 

include/lsp/lsp.h

@@ -2,59 +2,19 @@
 #define LSP_H
 
 #include "editor/editor.h"
+#include "main.h"
 #include "pch.h"
 #include "utils/utils.h"
+#include <cstdint>
+#include <sys/types.h>
 
-struct LSPPending {
+#define LSP_TIMEOUT_START 3000
-  Editor *editor = nullptr;
+#define LSP_TIMEOUT_QUIT_NORMAL 300
-  std::function<void(Editor *, const json &)> callback;
+#define LSP_TIMEOUT_QUIT_FORCE 80
-};
 
-// TODO: Defer any editor mutation to main thread to get rid of
+void lsp_worker();
-//       all mutex locks on the editor rope.
-// struct LSPPendingResponse {
-//   LSPPending *pending = nullptr;
-//   json message;
-// };
 
-struct LSPOpenRequest {
+static const json client_capabilities = {
-  Language language;
-  Editor *editor;
-};
-
-struct LSPInstance {
-  std::shared_mutex mtx;
-  const LSP *lsp;
-  std::string root_dir;
-  int pid{-1};
-  int stdin_fd{-1};
-  int stdout_fd{-1};
-  std::atomic<bool> initialized = false;
-  std::atomic<bool> exited = false;
-  bool incremental_sync = false;
-  bool allow_hover = false;
-  bool allow_completion = false;
-  bool allow_resolve = false;
-  bool allow_formatting = false;
-  bool allow_formatting_on_type = false;
-  bool is_utf8 = false;
-  std::vector<char> format_chars;
-  std::vector<char> trigger_chars;
-  std::vector<char> end_chars;
-  uint32_t last_id = 0;
-  Queue<json> inbox;
-  Queue<json> outbox;
-  Queue<std::pair<Language, Editor *>> open_queue;
-  std::unordered_map<uint32_t, LSPPending *> pending;
-  std::vector<Editor *> editors;
-};
-
-extern std::shared_mutex active_lsps_mtx;
-extern std::unordered_map<std::string, std::shared_ptr<LSPInstance>>
-    active_lsps;
-extern Queue<LSPOpenRequest> lsp_open_queue;
-
-static json client_capabilities = {
     {"general", {{"positionEncodings", {"utf-16"}}}},
     {"textDocument",
      {{"publishDiagnostics", {{"relatedInformation", true}}},
@@ -78,20 +38,415 @@ static json client_capabilities = {
         {"contextSupport", true},
         {"insertTextMode", 1}}}}}};
 
-void lsp_send(std::shared_ptr<LSPInstance> lsp, json message,
+struct LSPMessage {
-              LSPPending *pending);
+  Editor *editor = nullptr;
-void lsp_worker();
+  json message;
+  std::function<void(const LSPMessage &)> callback;
+};
 
-std::shared_ptr<LSPInstance> get_or_init_lsp(std::string lsp_id);
+namespace lsp {
-void clean_lsp(std::shared_ptr<LSPInstance> lsp, std::string lsp_id);
+extern std::mutex lsp_mutex;
-void close_lsp(std::string lsp_id);
+extern std::unordered_map<std::string, std::unique_ptr<LSPInstance>>
-std::optional<json> read_lsp_message(int fd);
+    active_lsps;
+extern Queue<std::string> need_opening;
+extern std::unordered_set<std::string> opened;
+extern std::vector<Editor *> new_editors;
+extern Queue<std::unique_ptr<LSPMessage>> response_queue;
+} // namespace lsp
 
-void open_editor(std::shared_ptr<LSPInstance> lsp,
+struct LSPInstance {
-                 std::pair<Language, Editor *> entry);
+  const LSP *lsp_info;
-void request_add_to_lsp(Language language, Editor *editor);
+  std::string root_dir;
-void add_to_lsp(Language language, Editor *editor);
+  int pid{-1};
-void remove_from_lsp(Editor *editor);
+  int stdin_fd{-1};
-void lsp_handle(std::shared_ptr<LSPInstance> lsp, json message);
+  int stdout_fd{-1};
+  std::atomic<bool> initialized = false;
+  std::atomic<bool> exited = false;
+  bool incremental_sync = false;
+  bool allow_hover = false;
+  bool allow_completion = false;
+  bool allow_resolve = false;
+  bool allow_formatting = false;
+  bool allow_formatting_on_type = false;
+  bool is_utf8 = false;
+  std::vector<char> format_chars;
+  std::vector<char> trigger_chars;
+  std::vector<char> end_chars;
+  uint32_t last_id = 0;
+  Queue<json> inbox;
+  Queue<json> outbox;
+  std::unordered_map<uint32_t, std::unique_ptr<LSPMessage>> pending;
+  std::vector<Editor *> editors;
+
+  LSPInstance(std::string lsp_id) {
+    lsp_info = &lsps[lsp_id];
+    if (!init_process()) {
+      exited = true;
+      return;
+    }
+    json initialize_message = {
+        {"jsonrpc", "2.0"},
+        {"id", ++last_id},
+        {"method", "initialize"},
+        {"params",
+         {{"processId", getpid()},
+          {"rootUri", "file://" + percent_encode(path_abs("."))},
+          {"capabilities", client_capabilities}}}};
+    send_raw(initialize_message);
+    pollfd pfd{stdout_fd, POLLIN, 0};
+    uint32_t waited = 0;
+    while (waited < LSP_TIMEOUT_START) {
+      poll(&pfd, 1, 50);
+      if (pfd.revents & POLLIN)
+        break;
+      if (!running)
+        return;
+      waited += 50;
+    }
+    if (!(pfd.revents & POLLIN)) {
+      exited = true;
+      return;
+    }
+    json response = *read_lsp_message();
+    if (response.contains("result") &&
+        response["result"].contains("capabilities")) {
+      auto &caps = response["result"]["capabilities"];
+      // if (caps.contains("positionEncoding")) {
+      //   std::string s = caps["positionEncoding"].get<std::string>();
+      //   if (s == "utf-8")
+      //     is_utf8 = true;
+      //   log("Lsp name: %s, supports: %s", lsp->command.c_str(),
+      //       s.c_str());
+      // }
+      if (caps.contains("textDocumentSync")) {
+        auto &sync = caps["textDocumentSync"];
+        if (sync.is_number()) {
+          int change_type = sync.get<int>();
+          incremental_sync = (change_type == 2);
+        } else if (sync.is_object() && sync.contains("change")) {
+          int change_type = sync["change"].get<int>();
+          incremental_sync = (change_type == 2);
+        }
+      }
+      allow_formatting = caps.value("documentFormattingProvider", false);
+      if (caps.contains("documentOnTypeFormattingProvider")) {
+        auto &fmt = caps["documentOnTypeFormattingProvider"];
+        if (fmt.is_object()) {
+          if (fmt.contains("firstTriggerCharacter")) {
+            std::string s = fmt["firstTriggerCharacter"].get<std::string>();
+            if (s.size() == 1)
+              format_chars.push_back(s[0]);
+          }
+          if (fmt.contains("moreTriggerCharacter")) {
+            for (auto &c : fmt["moreTriggerCharacter"]) {
+              std::string s = c.get<std::string>();
+              if (s.size() == 1)
+                format_chars.push_back(s[0]);
+            }
+          }
+          allow_formatting_on_type = true;
+        } else if (fmt.is_boolean()) {
+          allow_formatting_on_type = fmt.get<bool>();
+        }
+      }
+      if (caps.contains("hoverProvider")) {
+        auto &hover = caps["hoverProvider"];
+        allow_hover =
+            hover.is_boolean() ? hover.get<bool>() : hover.is_object();
+      } else {
+        allow_hover = false;
+      }
+      if (caps.contains("completionProvider")) {
+        allow_completion = true;
+        if (caps["completionProvider"].contains("resolveProvider"))
+          allow_resolve =
+              caps["completionProvider"]["resolveProvider"].get<bool>();
+        if (caps["completionProvider"].contains("triggerCharacters")) {
+          auto &chars = caps["completionProvider"]["triggerCharacters"];
+          if (chars.is_array()) {
+            for (auto &c : chars) {
+              std::string str = c.get<std::string>();
+              if (str.size() != 1)
+                continue;
+              trigger_chars.push_back(str[0]);
+            }
+          }
+        }
+        if (caps["completionProvider"].contains("allCommitCharacters")) {
+          auto &chars = caps["completionProvider"]["allCommitCharacters"];
+          if (chars.is_array()) {
+            for (auto &c : chars) {
+              std::string str = c.get<std::string>();
+              if (str.size() != 1)
+                continue;
+              end_chars.push_back(str[0]);
+            }
+          }
+        }
+      }
+    }
+    initialized = true;
+    json initialized_message = {{"jsonrpc", "2.0"},
+                                {"method", "initialized"},
+                                {"params", json::object()}};
+    send_raw(initialized_message);
+  }
+  ~LSPInstance() {
+    uint32_t timeout =
+        running ? LSP_TIMEOUT_QUIT_NORMAL : LSP_TIMEOUT_QUIT_FORCE;
+    for (auto &ed : editors)
+      ed->lsp.store(nullptr);
+    initialized = false;
+    exited = true;
+    if (pid == -1)
+      return;
+    json shutdown = {
+        {"jsonrpc", "2.0"}, {"id", ++last_id}, {"method", "shutdown"}};
+    send_raw(shutdown);
+    pollfd pfd{stdout_fd, POLLIN, 0};
+    poll(&pfd, 1, timeout);
+    if (pfd.revents & POLLIN) {
+      json exit_msg = {{"jsonrpc", "2.0"}, {"method", "exit"}};
+      send_raw(exit_msg);
+      uint32_t waited = 0;
+      while (waited < timeout) {
+        int status;
+        pid_t res = waitpid(pid, &status, WNOHANG);
+        if (res == pid)
+          break;
+        std::this_thread::sleep_for(10ms);
+        waited += 10;
+      }
+    }
+    close(stdin_fd);
+    close(stdout_fd);
+    if (kill(pid, 0) == 0) {
+      kill(pid, SIGKILL);
+      waitpid(pid, nullptr, 0);
+    }
+    pid = -1;
+  }
+  bool init_process() {
+    int in_pipe[2];
+    int out_pipe[2];
+    if (pipe(in_pipe) == -1 || pipe(out_pipe) == -1) {
+      perror("pipe");
+      return false;
+    }
+    pid_t pid_tmp = fork();
+    if (pid_tmp == -1) {
+      perror("fork");
+      return false;
+    }
+    if (pid_tmp == 0) {
+      dup2(in_pipe[0], STDIN_FILENO);
+      dup2(out_pipe[1], STDOUT_FILENO);
+      int devnull = open("/dev/null", O_WRONLY);
+      if (devnull >= 0) {
+        dup2(devnull, STDERR_FILENO);
+        close(devnull);
+      }
+      close(in_pipe[0]);
+      close(in_pipe[1]);
+      close(out_pipe[0]);
+      close(out_pipe[1]);
+      std::vector<char *> argv;
+      argv.push_back(const_cast<char *>(lsp_info->command.c_str()));
+      for (auto &arg : lsp_info->args)
+        argv.push_back(const_cast<char *>(arg.c_str()));
+      argv.push_back(nullptr);
+      execvp(lsp_info->command.c_str(), argv.data());
+      perror("execvp");
+      _exit(127);
+    }
+    pid = pid_tmp;
+    stdin_fd = in_pipe[1];
+    stdout_fd = out_pipe[0];
+    close(in_pipe[0]);
+    close(out_pipe[1]);
+    return true;
+  }
+  void add(Editor *ed) {
+    editors.push_back(ed);
+    ed->lsp.store(this);
+    char *buf = read(ed->root, 0, ed->root->char_count);
+    std::string text(buf);
+    free(buf);
+    json message = {{"jsonrpc", "2.0"},
+                    {"method", "textDocument/didOpen"},
+                    {"params",
+                     {{"textDocument",
+                       {{"uri", ed->uri},
+                        {"languageId", ed->lang.name},
+                        {"version", 1},
+                        {"text", text}}}}}};
+    send_raw(message);
+  }
+  void remove(Editor *ed) {
+    std::unique_lock lock(lsp::lsp_mutex);
+    editors.erase(std::remove(editors.begin(), editors.end(), ed),
+                  editors.end());
+    lock.unlock();
+    auto message = std::make_unique<LSPMessage>();
+    message->message = {{"method", "textDocument/didClose"},
+                        {"params", {{"textDocument", {{"uri", ed->uri}}}}}};
+    send(std::move(message));
+  }
+  void work() {
+    if (exited)
+      return;
+    int status;
+    pid_t res = waitpid(pid, &status, WNOHANG);
+    if (res == pid) {
+      exited = true;
+      pid = -1;
+      return;
+    }
+    while (!outbox.empty()) {
+      json message = outbox.front();
+      std::string m = message.value("method", "");
+      outbox.pop();
+      send_raw(message);
+    }
+    pollfd pfd{stdout_fd, POLLIN | POLLHUP | POLLERR, 0};
+    int r = poll(&pfd, 1, 0);
+    if (r > 0 && pfd.revents & (POLLHUP | POLLERR)) {
+      exited = true;
+      pid = -1;
+      return;
+    }
+    while ((r = poll(&pfd, 1, 0)) > 0) {
+      if (pfd.revents & (POLLHUP | POLLERR)) {
+        exited = true;
+        pid = -1;
+        return;
+      }
+      auto msg = read_lsp_message();
+      if (!msg)
+        break;
+      if (msg->contains("id")) {
+        uint32_t id = msg->at("id").get<uint32_t>();
+        auto it = pending.find(id);
+        if (it != pending.end()) {
+          if (it->second->editor) {
+            it->second->message = *msg;
+            lsp::response_queue.push(std::move(it->second));
+          } else {
+            auto message = *std::move(it->second);
+            message.message = *msg;
+            message.callback(message);
+          }
+          pending.erase(it);
+        }
+      } else if (msg->contains("method")) {
+        std::string uri;
+        if (msg->contains("params")) {
+          auto &p = (*msg)["params"];
+          if (p.contains("textDocument") && p["textDocument"].contains("uri"))
+            uri = p["textDocument"]["uri"].get<std::string>();
+          else if (p.contains("uri"))
+            uri = p["uri"].get<std::string>();
+        }
+        Editor *ed = resolve_uri(uri);
+        auto response = std::make_unique<LSPMessage>();
+        response->editor = ed;
+        response->message = *msg;
+        response->callback = editor_handle_wrapper;
+        if (ed)
+          lsp::response_queue.push(std::move(response));
+        else
+          lsp_handle(*msg);
+      }
+    }
+  }
+  inline static void editor_handle_wrapper(const LSPMessage &message) {
+    message.editor->lsp_handle(message.message);
+  }
+  inline void send_raw(const json &msg) {
+    std::string payload = msg.dump();
+    std::string header =
+        "Content-Length: " + std::to_string(payload.size()) + "\r\n\r\n";
+    std::string out = header + payload;
+    const char *ptr = out.data();
+    size_t remaining = out.size();
+    while (remaining > 0) {
+      ssize_t n = write(stdin_fd, ptr, remaining);
+      if (n <= 0) {
+        if (errno == EINTR)
+          continue;
+        break;
+      }
+      ptr += n;
+      remaining -= n;
+    }
+  };
+  inline std::optional<json> read_lsp_message() {
+    std::string header;
+    char c;
+    while (true) {
+      ssize_t n = read(stdout_fd, &c, 1);
+      if (n <= 0)
+        return std::nullopt;
+      header.push_back(c);
+      if (header.size() >= 4 && header.substr(header.size() - 4) == "\r\n\r\n")
+        break;
+    }
+    size_t pos = header.find("Content-Length:");
+    if (pos == std::string::npos)
+      return std::nullopt;
+    pos += strlen("Content-Length:");
+    while (pos < header.size() && std::isspace(header[pos]))
+      pos++;
+    size_t end = pos;
+    while (end < header.size() && std::isdigit(header[end]))
+      end++;
+    size_t len = std::stoul(header.substr(pos, end - pos));
+    std::string body(len, '\0');
+    size_t got = 0;
+    while (got < len) {
+      ssize_t n = read(stdout_fd, &body[got], len - got);
+      if (n <= 0)
+        return std::nullopt;
+      got += n;
+    }
+    return json::parse(body);
+  }
+  inline Editor *resolve_uri(std::string uri) {
+    if (uri.empty())
+      return nullptr;
+    for (auto &editor : editors)
+      if (editor->uri == uri)
+        return editor;
+    return nullptr;
+  }
+  inline void lsp_handle(json &message) {
+    std::string method = message.value("method", "");
+    if (method == "window/showMessage") {
+      if (message.contains("params")) {
+        auto &p = message["params"];
+        if (p.contains("message"))
+          log("%s\n", p["message"].get<std::string>().c_str());
+      }
+    } else if (method == "window/logMessage") {
+      if (message.contains("params")) {
+        auto &p = message["params"];
+        if (p.contains("message"))
+          log("%s\n", p["message"].get<std::string>().c_str());
+      }
+    }
+  }
+  void send(std::unique_ptr<LSPMessage> message) {
+    if (pid == -1)
+      return;
+    message->message["jsonrpc"] = "2.0";
+    if (message->callback)
+      message->message["id"] = ++last_id;
+    outbox.push(message->message);
+    if (!message->callback)
+      return;
+    std::lock_guard lock(lsp::lsp_mutex);
+    pending[last_id] = std::move(message);
+  }
+};
 
 #endif

include/main.h

@@ -12,8 +12,10 @@
 
 extern std::atomic<bool> running;
 extern std::atomic<uint8_t> mode;
-extern std::vector<struct Editor *> editors;
+extern fs::path pwd;
-extern uint8_t current_editor;
+
+namespace ui {
 extern Bar bar;
+} // namespace ui
 
 #endif

include/pch.h

@@ -31,6 +31,7 @@ extern "C" {
 #include <filesystem>
 #include <fstream>
 #include <functional>
+#include <immintrin.h>
 #include <limits.h>
 #include <map>
 #include <mutex>
@@ -50,6 +51,7 @@ extern "C" {
 #include <thread>
 #include <unistd.h>
 #include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 using json = nlohmann::json;

include/ruby/decl.h

@@ -3,6 +3,7 @@
 
 #include "syntax/decl.h"
 #include "utils/utils.h"
+#include "windows/decl.h"
 
 namespace fs = std::filesystem;
 
@@ -45,9 +46,7 @@ bool custom_compare(mrb_value match_block, std::string state1,
 std::string parse_custom(std::vector<Token> *tokens, mrb_value parser_block,
                          const char *line, uint32_t len, std::string state,
                          uint32_t c_line);
-BarLine bar_contents(uint8_t mode, std::string lang_name, uint32_t warnings,
+BarLine bar_contents(uint8_t mode, uint32_t width, std::string foldername,
-                     std::string lsp_name, std::string filename,
+                     Window *window);
-                     std::string foldername, uint32_t line, uint32_t max_line,
-                     uint32_t width);
 
 #endif

include/ruby/libcrib.rb

@@ -177,7 +177,7 @@ module C
       color: 0x6e1516,
       symbol: " ",
       extensions: ["erb"],
-      lsp: "ruby-lsp"
+      lsp: "emmet-language-server"
     },
     lua: {
       color: 0x36a3d9,
@@ -331,7 +331,7 @@ module C
   @b_startup = nil
   @b_shutdown = nil
   @b_bar = proc do |info|
-    # mode, lang_name, warnings, lsp_name, filename, foldername, line, max_line, width
+    # mode, width, data[5] : strings (any data about the focused window)
     # puts info.inspect
     mode_color = 0x82AAFF
     mode_symbol = "  "
@@ -352,11 +352,15 @@ module C
       mode_color = 0xF29CC3
       mode_symbol = " "
     end
-    lang_info = C.languages[info[:lang_name]]
+    lang_info = C.languages[:default]
-    if lang_info.nil?
+    filename = ""
-      lang_info = C.languages[:default]
+    if info[:data][0] == "editor"
+      lang_info = C.languages[info[:data][2]] if info[:data][2] != ""
+      if lang_info.nil?
+        lang_info = C.languages[:default]
+      end
+      filename = File.basename(info[:data][1]) if info[:data][1] != ""
     end
-    filename = File.basename(info[:filename])
     starting = " #{mode_symbol} #{info[:mode].to_s.upcase}  #{lang_info[:symbol]} #{filename}"
     highlights = []
     highlights << { fg: 0x0b0e14, bg: mode_color, flags: 1 << 1, start: 0, length: 10 }

include/ruby/ruby_compiled.h

@@ -1,8 +1,8 @@
 #pragma once
 constexpr unsigned char _tmp___crib_precompiled_mrb[] = {
-  0x52, 0x49, 0x54, 0x45, 0x30, 0x34, 0x30, 0x30, 0x00, 0x00, 0x2b, 0xbe,
+  0x52, 0x49, 0x54, 0x45, 0x30, 0x34, 0x30, 0x30, 0x00, 0x00, 0x2c, 0x1d,
   0x4d, 0x41, 0x54, 0x5a, 0x30, 0x30, 0x30, 0x30, 0x49, 0x52, 0x45, 0x50,
-  0x00, 0x00, 0x2a, 0x2a, 0x30, 0x34, 0x30, 0x30, 0x00, 0x00, 0x00, 0xa2,
+  0x00, 0x00, 0x2a, 0x89, 0x30, 0x34, 0x30, 0x30, 0x00, 0x00, 0x00, 0xa2,
   0x00, 0x01, 0x00, 0x03, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3a,
   0x11, 0x01, 0x68, 0x01, 0x00, 0x69, 0x01, 0x00, 0x6b, 0x01, 0x01, 0x01,
   0x11, 0x01, 0x68, 0x01, 0x02, 0x69, 0x01, 0x02, 0x11, 0x01, 0x68, 0x01,
@@ -301,7 +301,7 @@ constexpr unsigned char _tmp___crib_precompiled_mrb[] = {
   0x05, 0x5c, 0x21, 0x0f, 0x5e, 0x1a, 0x04, 0x10, 0x1b, 0x12, 0x10, 0x1c,
   0x02, 0x0f, 0x1d, 0x00, 0x6e, 0x15, 0x16, 0x10, 0x1e, 0x03, 0x5c, 0x1f,
   0x38, 0x10, 0x20, 0x04, 0x5c, 0x21, 0x42, 0x52, 0x21, 0x01, 0x10, 0x22,
-  0x05, 0x5c, 0x23, 0x08, 0x5e, 0x1c, 0x04, 0x10, 0x1d, 0x13, 0x10, 0x1e,
+  0x05, 0x5c, 0x23, 0x15, 0x5e, 0x1c, 0x04, 0x10, 0x1d, 0x13, 0x10, 0x1e,
   0x02, 0x0f, 0x1f, 0x00, 0x36, 0xa3, 0xd9, 0x10, 0x20, 0x03, 0x5c, 0x21,
   0x43, 0x10, 0x22, 0x04, 0x5c, 0x23, 0x44, 0x52, 0x23, 0x01, 0x10, 0x24,
   0x05, 0x5c, 0x25, 0x17, 0x5e, 0x1e, 0x04, 0x10, 0x1f, 0x14, 0x10, 0x20,
@@ -576,8 +576,8 @@ constexpr unsigned char _tmp___crib_precompiled_mrb[] = {
   0x63, 0x6f, 0x70, 0x79, 0x00, 0x00, 0x08, 0x40, 0x62, 0x5f, 0x70, 0x61,
   0x73, 0x74, 0x65, 0x00, 0x00, 0x0e, 0x40, 0x62, 0x5f, 0x66, 0x69, 0x6c,
   0x65, 0x5f, 0x64, 0x65, 0x74, 0x65, 0x63, 0x74, 0x00, 0x00, 0x00, 0x03,
-  0x55, 0x00, 0x09, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
+  0xb4, 0x00, 0x09, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
-  0x1f, 0x39, 0x04, 0x00, 0x00, 0x0f, 0x03, 0x00, 0x82, 0xaa, 0xff, 0x5c,
+  0x7b, 0x39, 0x04, 0x00, 0x00, 0x0f, 0x03, 0x00, 0x82, 0xaa, 0xff, 0x5c,
   0x04, 0x00, 0x01, 0x09, 0x01, 0x10, 0x0a, 0x00, 0x23, 0x09, 0x10, 0x0a,
   0x01, 0x01, 0x0b, 0x09, 0x32, 0x0a, 0x02, 0x01, 0x28, 0x0a, 0x00, 0x0c,
   0x0f, 0x03, 0x00, 0x82, 0xaa, 0xff, 0x5c, 0x04, 0x01, 0x26, 0x00, 0x68,
@@ -590,263 +590,256 @@ constexpr unsigned char _tmp___crib_precompiled_mrb[] = {
   0x5c, 0x04, 0x04, 0x26, 0x00, 0x1a, 0x10, 0x0a, 0x06, 0x01, 0x0b, 0x09,
   0x32, 0x0a, 0x02, 0x01, 0x28, 0x0a, 0x00, 0x0c, 0x0f, 0x03, 0x00, 0xf2,
   0x9c, 0xc3, 0x5c, 0x04, 0x05, 0x26, 0x00, 0x00, 0x1d, 0x09, 0x07, 0x33,
-  0x09, 0x08, 0x01, 0x0a, 0x01, 0x10, 0x0b, 0x09, 0x23, 0x0a, 0x23, 0x09,
+  0x09, 0x08, 0x10, 0x0a, 0x09, 0x23, 0x09, 0x01, 0x05, 0x09, 0x5c, 0x06,
-  0x01, 0x05, 0x09, 0x01, 0x09, 0x05, 0x29, 0x09, 0x00, 0x03, 0x26, 0x00,
+  0x06, 0x01, 0x09, 0x01, 0x10, 0x0a, 0x0a, 0x23, 0x09, 0x06, 0x0a, 0x23,
-  0x0e, 0x1d, 0x09, 0x07, 0x33, 0x09, 0x08, 0x10, 0x0a, 0x0a, 0x23, 0x09,
+  0x09, 0x5c, 0x0a, 0x07, 0x4d, 0x09, 0x28, 0x09, 0x00, 0x73, 0x01, 0x09,
-  0x01, 0x05, 0x09, 0x1d, 0x09, 0x0b, 0x01, 0x0a, 0x01, 0x10, 0x0b, 0x0c,
+  0x01, 0x10, 0x0a, 0x0a, 0x23, 0x09, 0x08, 0x0a, 0x23, 0x09, 0x5c, 0x0a,
-  0x23, 0x0a, 0x32, 0x09, 0x0d, 0x01, 0x01, 0x06, 0x09, 0x5c, 0x09, 0x06,
+  0x06, 0x32, 0x09, 0x0b, 0x01, 0x28, 0x09, 0x00, 0x17, 0x1d, 0x09, 0x07,
-  0x01, 0x0a, 0x04, 0x5d, 0x09, 0x5c, 0x0a, 0x06, 0x5d, 0x09, 0x01, 0x0a,
+  0x33, 0x09, 0x08, 0x01, 0x0a, 0x01, 0x10, 0x0b, 0x0a, 0x23, 0x0a, 0x08,
-  0x01, 0x10, 0x0b, 0x00, 0x23, 0x0a, 0x33, 0x0a, 0x0e, 0x33, 0x0a, 0x0f,
+  0x0b, 0x23, 0x0a, 0x23, 0x09, 0x01, 0x05, 0x09, 0x01, 0x09, 0x05, 0x29,
-  0x5d, 0x09, 0x5c, 0x0a, 0x07, 0x5d, 0x09, 0x01, 0x0a, 0x05, 0x10, 0x0b,
+  0x09, 0x00, 0x03, 0x26, 0x00, 0x0e, 0x1d, 0x09, 0x07, 0x33, 0x09, 0x08,
-  0x10, 0x23, 0x0a, 0x5d, 0x09, 0x5c, 0x0a, 0x06, 0x5d, 0x09, 0x01, 0x0a,
+  0x10, 0x0a, 0x09, 0x23, 0x09, 0x01, 0x05, 0x09, 0x01, 0x09, 0x01, 0x10,
-  0x06, 0x5d, 0x09, 0x5c, 0x0a, 0x08, 0x5d, 0x09, 0x01, 0x07, 0x09, 0x52,
+  0x0a, 0x0a, 0x23, 0x09, 0x07, 0x0a, 0x23, 0x09, 0x5c, 0x0a, 0x06, 0x32,
-  0x08, 0x00, 0x01, 0x09, 0x08, 0x10, 0x0a, 0x11, 0x0f, 0x0b, 0x00, 0x0b,
+  0x09, 0x0b, 0x01, 0x28, 0x09, 0x00, 0x16, 0x1d, 0x09, 0x0c, 0x01, 0x0a,
-  0x0e, 0x14, 0x10, 0x0c, 0x12, 0x01, 0x0d, 0x03, 0x10, 0x0e, 0x13, 0x08,
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+  0x65, 0x6e, 0x64, 0x5f, 0x77, 0x69, 0x74, 0x68, 0x3f, 0x00, 0x00, 0x04,
-  0x70, 0x00, 0x03, 0x64, 0x73, 0x6c, 0x00, 0x01, 0x6b, 0x00, 0x03, 0x61,
+  0x46, 0x69, 0x6c, 0x65, 0x00, 0x00, 0x01, 0x43, 0x00, 0x00, 0x0b, 0x63,
-  0x63, 0x74, 0x00, 0x03, 0x62, 0x6c, 0x6b, 0x00, 0x04, 0x6d, 0x6f, 0x64,
+  0x6f, 0x6e, 0x66, 0x69, 0x67, 0x5f, 0x66, 0x69, 0x6c, 0x65, 0x00, 0x00,
-  0x65, 0x00, 0x03, 0x6b, 0x65, 0x79, 0x00, 0x04, 0x70, 0x61, 0x74, 0x68,
+  0x07, 0x64, 0x69, 0x72, 0x6e, 0x61, 0x6d, 0x65, 0x00, 0x00, 0x0b, 0x65,
-  0x00, 0x04, 0x62, 0x69, 0x6e, 0x64, 0x00, 0x04, 0x63, 0x6f, 0x64, 0x65,
+  0x78, 0x70, 0x61, 0x6e, 0x64, 0x5f, 0x70, 0x61, 0x74, 0x68, 0x00, 0x00,
-  0x00, 0x00, 0xff, 0xff, 0x00, 0x01, 0xff, 0xff, 0x00, 0x02, 0xff, 0xff,
+  0x07, 0x24, 0x4c, 0x4f, 0x41, 0x44, 0x45, 0x44, 0x00, 0x00, 0x06, 0x64,
-  0x00, 0x02, 0xff, 0xff, 0x00, 0x02, 0xff, 0xff, 0x00, 0x02, 0xff, 0xff,
+  0x65, 0x6c, 0x65, 0x74, 0x65, 0x00, 0x00, 0x10, 0x72, 0x65, 0x71, 0x75,
-  0x00, 0x02, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, 0xff, 0xff, 0x00, 0x03,
+  0x69, 0x72, 0x65, 0x5f, 0x72, 0x65, 0x6c, 0x61, 0x74, 0x69, 0x76, 0x65,
-  0x00, 0x04, 0xff, 0xff, 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00, 0x08,
+  0x00, 0x4c, 0x56, 0x41, 0x52, 0x00, 0x00, 0x01, 0x78, 0x00, 0x00, 0x00,
-  0x00, 0x09, 0x00, 0x0a, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0x00, 0x08,
+  0x1d, 0x00, 0x03, 0x63, 0x6d, 0x64, 0x00, 0x04, 0x74, 0x65, 0x78, 0x74,
-  0xff, 0xff, 0x00, 0x0b, 0x00, 0x0c, 0x00, 0x0d, 0x00, 0x0e, 0xff, 0xff,
+  0x00, 0x01, 0x66, 0x00, 0x07, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x65, 0x64,
-  0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff,
+  0x00, 0x04, 0x69, 0x6e, 0x66, 0x6f, 0x00, 0x0a, 0x6d, 0x6f, 0x64, 0x65,
-  0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff,
+  0x5f, 0x63, 0x6f, 0x6c, 0x6f, 0x72, 0x00, 0x0b, 0x6d, 0x6f, 0x64, 0x65,
-  0x00, 0x0f, 0x00, 0x10, 0x00, 0x11, 0x00, 0x12, 0xff, 0xff, 0x00, 0x0f,
+  0x5f, 0x73, 0x79, 0x6d, 0x62, 0x6f, 0x6c, 0x00, 0x09, 0x6c, 0x61, 0x6e,
-  0x00, 0x13, 0x00, 0x14, 0x00, 0x15, 0x00, 0x16, 0xff, 0xff, 0x00, 0x17,
+  0x67, 0x5f, 0x69, 0x6e, 0x66, 0x6f, 0x00, 0x08, 0x66, 0x69, 0x6c, 0x65,
-  0x00, 0x18, 0xff, 0xff, 0x00, 0x19, 0xff, 0xff, 0x00, 0x18, 0xff, 0xff,
+  0x6e, 0x61, 0x6d, 0x65, 0x00, 0x08, 0x73, 0x74, 0x61, 0x72, 0x74, 0x69,
-  0x00, 0x19, 0xff, 0xff, 0x00, 0x1a, 0x00, 0x1b, 0xff, 0xff, 0x00, 0x1c,
+  0x6e, 0x67, 0x00, 0x0a, 0x68, 0x69, 0x67, 0x68, 0x6c, 0x69, 0x67, 0x68,
-  0x00, 0x1a, 0x00, 0x1b, 0xff, 0xff, 0x45, 0x4e, 0x44, 0x00, 0x00, 0x00,
+  0x74, 0x73, 0x00, 0x04, 0x74, 0x79, 0x70, 0x65, 0x00, 0x0a, 0x66, 0x69,
-  0x00, 0x08
+  0x72, 0x73, 0x74, 0x5f, 0x6c, 0x69, 0x6e, 0x65, 0x00, 0x07, 0x73, 0x68,
+  0x65, 0x62, 0x61, 0x6e, 0x67, 0x00, 0x08, 0x6d, 0x69, 0x6d, 0x65, 0x74,
+  0x79, 0x70, 0x65, 0x00, 0x05, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x00, 0x05,
+  0x6d, 0x6f, 0x64, 0x65, 0x73, 0x00, 0x04, 0x6b, 0x65, 0x79, 0x73, 0x00,
+  0x06, 0x61, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x03, 0x61, 0x70, 0x70,
+  0x00, 0x03, 0x64, 0x73, 0x6c, 0x00, 0x01, 0x6b, 0x00, 0x03, 0x61, 0x63,
+  0x74, 0x00, 0x03, 0x62, 0x6c, 0x6b, 0x00, 0x04, 0x6d, 0x6f, 0x64, 0x65,
+  0x00, 0x03, 0x6b, 0x65, 0x79, 0x00, 0x04, 0x70, 0x61, 0x74, 0x68, 0x00,
+  0x04, 0x62, 0x69, 0x6e, 0x64, 0x00, 0x04, 0x63, 0x6f, 0x64, 0x65, 0x00,
+  0x00, 0xff, 0xff, 0x00, 0x01, 0xff, 0xff, 0x00, 0x02, 0xff, 0xff, 0x00,
+  0x02, 0xff, 0xff, 0x00, 0x02, 0xff, 0xff, 0x00, 0x02, 0xff, 0xff, 0x00,
+  0x02, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, 0xff, 0xff, 0x00, 0x03, 0x00,
+  0x04, 0xff, 0xff, 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00, 0x08, 0x00,
+  0x09, 0x00, 0x0a, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0x00, 0x08, 0xff,
+  0xff, 0x00, 0x0b, 0x00, 0x0c, 0x00, 0x0d, 0x00, 0x0e, 0xff, 0xff, 0x00,
+  0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00,
+  0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00,
+  0x0f, 0x00, 0x10, 0x00, 0x11, 0x00, 0x12, 0xff, 0xff, 0x00, 0x0f, 0x00,
+  0x13, 0x00, 0x14, 0x00, 0x15, 0x00, 0x16, 0xff, 0xff, 0x00, 0x17, 0x00,
+  0x18, 0xff, 0xff, 0x00, 0x19, 0xff, 0xff, 0x00, 0x18, 0xff, 0xff, 0x00,
+  0x19, 0xff, 0xff, 0x00, 0x1a, 0x00, 0x1b, 0xff, 0xff, 0x00, 0x1c, 0x00,
+  0x1a, 0x00, 0x1b, 0xff, 0xff, 0x45, 0x4e, 0x44, 0x00, 0x00, 0x00, 0x00,
+  0x08
 };
-constexpr unsigned int _tmp___crib_precompiled_mrb_len = 11198;
+constexpr unsigned int _tmp___crib_precompiled_mrb_len = 11293;

include/syntax/decl.h

@@ -6,6 +6,8 @@
 #include "pch.h"
 #include "syntax/trie.h"
 
+#define MAX_LINES_LOOKAROUND 512
+
 struct Highlight {
   uint32_t fg{0xFFFFFF};
   uint32_t bg{0x000000};
@@ -35,10 +37,23 @@ struct Token {
   TokenKind type;
 };
 
+struct StateBase {
+  virtual ~StateBase() = default;
+  virtual std::unique_ptr<StateBase> clone() const = 0;
+};
+
+struct CustomState : StateBase {
+  std::string value;
+  explicit CustomState(std::string v) : value(std::move(v)) {}
+  std::unique_ptr<StateBase> clone() const override {
+    return std::make_unique<CustomState>(value);
+  }
+};
+
 struct LineData {
-  std::shared_ptr<void> in_state{nullptr};
+  std::unique_ptr<StateBase> out_state;
   std::vector<Token> tokens;
-  std::shared_ptr<void> out_state{nullptr};
+  std::unique_ptr<StateBase> in_state;
 };
 
 #endif

include/syntax/langs.h

@@ -4,29 +4,19 @@
 #include "syntax/decl.h"
 
 #define DEF_LANG(name)                                                         \
-  std::shared_ptr<void> name##_parse(                                          \
+  std::unique_ptr<StateBase> name##_parse(                                     \
-      std::vector<Token> *tokens, std::shared_ptr<void> in_state,              \
+      std::vector<Token> *tokens, StateBase *in_state, const char *text,       \
-      const char *text, uint32_t len, uint32_t line_num);                      \
+      uint32_t len, uint32_t line_num);                                        \
-  bool name##_state_match(std::shared_ptr<void> state_1,                       \
+  bool name##_state_match(StateBase *state_1, StateBase *state_2);
-                          std::shared_ptr<void> state_2);
 
 #define LANG_A(name)                                                           \
   {                                                                            \
     #name, { name##_parse, name##_state_match }                                \
   }
 
-template <typename T>
+template <typename B, typename A>
-inline std::shared_ptr<T> ensure_state(std::shared_ptr<T> state) {
+std::unique_ptr<B> static_unique_ptr_cast(std::unique_ptr<A> &&p) {
-  using U = typename T::full_state_type;
+  return std::unique_ptr<B>(static_cast<B *>(p.release()));
-  if (!state)
-    state = std::make_shared<T>();
-  if (!state.unique())
-    state = std::make_shared<T>(*state);
-  if (!state->full_state)
-    state->full_state = std::make_shared<U>();
-  else if (!state->full_state.unique())
-    state->full_state = std::make_shared<U>(*state->full_state);
-  return state;
 }
 
 DEF_LANG(ruby);
@@ -34,11 +24,10 @@ DEF_LANG(bash);
 
 inline static const std::unordered_map<
     std::string,
-    std::tuple<std::shared_ptr<void> (*)(
+    std::tuple<std::unique_ptr<StateBase> (*)(
-                   std::vector<Token> *tokens, std::shared_ptr<void> in_state,
+                   std::vector<Token> *tokens, StateBase *in_state,
                    const char *text, uint32_t len, uint32_t line_num),
-               bool (*)(std::shared_ptr<void> state_1,
+               bool (*)(StateBase *state_1, StateBase *state_2)>>
-                        std::shared_ptr<void> state_2)>>
     parsers = {
         LANG_A(ruby),
         LANG_A(bash),

include/syntax/line_map.h

@@ -0,0 +1,136 @@
+#ifndef LINE_MAP_H
+#define LINE_MAP_H
+
+#include "syntax/decl.h"
+
+struct LineKey {
+  uint32_t line;
+  uint32_t version;
+  bool operator==(const LineKey &other) const {
+    return line == other.line && version == other.version;
+  }
+};
+
+struct LineKeyHash {
+  size_t operator()(const LineKey &key) const {
+    uint64_t combined = (uint64_t(key.line) << 32) | key.version;
+    return std::hash<uint64_t>()(combined);
+  }
+};
+
+struct EditDelta {
+  uint32_t start_line;
+  int64_t delta;
+};
+
+struct LineMap {
+  LineMap() : current_version(0) { edit_log.push_back({0, 0}); }
+
+  LineData *at(uint32_t line) {
+    auto key_opt = resolve_line(line);
+    if (!key_opt)
+      return nullptr;
+    LineKey key = *key_opt;
+    if (key.version == current_version)
+      return lines[key].get();
+    auto data_ptr = std::move(lines[key]);
+    lines.erase(key);
+    key = {line, current_version};
+    lines[key] = std::move(data_ptr);
+    return lines[key].get();
+  }
+
+  LineData *create_at(uint32_t line) {
+    auto key_opt = resolve_line(line);
+    LineKey key;
+    std::unique_ptr<LineData> data_ptr;
+    if (key_opt) {
+      key = *key_opt;
+      if (key.version == current_version)
+        return lines[key].get();
+      data_ptr = std::move(lines[key]);
+      lines.erase(key);
+    } else {
+      data_ptr = std::make_unique<LineData>();
+    }
+    key = {line, current_version};
+    lines[key] = std::move(data_ptr);
+    return lines[key].get();
+  }
+
+  void apply_edit(uint32_t start, int64_t delta) {
+    if (delta < 0)
+      batch_remove(start, -delta);
+    current_version++;
+    edit_log.push_back({start, delta});
+  }
+
+private:
+  std::unordered_map<LineKey, std::unique_ptr<LineData>, LineKeyHash> lines;
+
+  std::vector<EditDelta> edit_log;
+
+  uint32_t current_version;
+
+  void batch_remove(uint32_t line, uint32_t count) {
+    std::vector<uint32_t> lines_t;
+    lines_t.reserve(count);
+    for (uint32_t i = 0; i < count; i++)
+      lines_t.push_back(line + i);
+    for (int64_t v = current_version; v >= 0; v--) {
+      for (auto &l : lines_t) {
+        if (l == UINT32_MAX)
+          continue;
+        LineKey key = {l, (uint32_t)v};
+        if (lines.find(key) != lines.end()) {
+          lines.erase(key);
+          l = UINT32_MAX;
+        }
+      }
+      bool all_removed = true;
+      const auto &edit = edit_log[v];
+      for (auto &l : lines_t) {
+        if (l == UINT32_MAX)
+          continue;
+        all_removed = false;
+        if (edit.delta > 0) {
+          if (l >= edit.start_line) {
+            if (l < edit.start_line + edit.delta)
+              l = UINT32_MAX;
+            else
+              l -= edit.delta;
+          }
+        } else {
+          if (l >= edit.start_line)
+            l -= edit.delta;
+        }
+      }
+      if (all_removed)
+        break;
+    }
+    return;
+  }
+
+  std::optional<LineKey> resolve_line(uint32_t line) {
+    uint32_t current_line = line;
+    for (int64_t v = current_version; v >= 0; v--) {
+      LineKey key = {current_line, (uint32_t)v};
+      if (lines.find(key) != lines.end())
+        return key;
+      const auto &edit = edit_log[v];
+      if (edit.delta > 0) {
+        if (current_line >= edit.start_line) {
+          if (current_line < edit.start_line + edit.delta)
+            return std::nullopt;
+          current_line -= edit.delta;
+        }
+      } else {
+        if (current_line >= edit.start_line)
+          current_line -= edit.delta;
+      }
+    }
+    return std::nullopt;
+  }
+};
+
+#endif

include/syntax/line_tree.h

@@ -1,232 +0,0 @@
-#ifndef LINE_TREE_H
-#define LINE_TREE_H
-
-#include "syntax/decl.h"
-
-struct LineTree {
-  void clear() {
-    clear_node(root);
-    root = nullptr;
-    stack_size = 0;
-  }
-  void build(uint32_t x) { root = build_node(x); }
-  LineData *at(uint32_t x) {
-    LineNode *n = root;
-    while (n) {
-      uint32_t left_size = n->left ? n->left->size : 0;
-      if (x < left_size) {
-        n = n->left;
-      } else if (x < left_size + n->data.size()) {
-        return &n->data[x - left_size];
-      } else {
-        x -= left_size + n->data.size();
-        n = n->right;
-      }
-    }
-    return nullptr;
-  }
-  LineData *start_iter(uint32_t x) {
-    stack_size = 0;
-    LineNode *n = root;
-    while (n) {
-      uint32_t left_size = n->left ? n->left->size : 0;
-      if (x < left_size) {
-        push(n, 0);
-        n = n->left;
-      } else if (x < left_size + n->data.size()) {
-        push(n, x - left_size + 1);
-        return &n->data[x - left_size];
-      } else {
-        x -= left_size + n->data.size();
-        push(n, UINT32_MAX);
-        n = n->right;
-      }
-    }
-    return nullptr;
-  }
-  void end_iter() { stack_size = 0; }
-  LineData *next() {
-    while (stack_size) {
-      auto &f = stack[stack_size - 1];
-      LineNode *n = f.node;
-      if (f.index < n->data.size())
-        return &n->data[f.index++];
-      stack_size--;
-      if (n->right) {
-        n = n->right;
-        while (n) {
-          push(n, 0);
-          if (!n->left)
-            break;
-          n = n->left;
-        }
-        return &stack[stack_size - 1].node->data[0];
-      }
-    }
-    return nullptr;
-  }
-  void insert(uint32_t x, uint32_t y) {
-    if (x > subtree_size(root))
-      x = subtree_size(root);
-    root = insert_node(root, x, y);
-  }
-  void erase(uint32_t x, uint32_t y) {
-    if (x + y > subtree_size(root))
-      x = subtree_size(root) - y;
-    root = erase_node(root, x, y);
-  }
-  uint32_t count() { return subtree_size(root); }
-  ~LineTree() { clear(); }
-
-private:
-  struct LineNode {
-    LineNode *left = nullptr;
-    LineNode *right = nullptr;
-    uint8_t depth = 1;
-    uint32_t size = 0;
-    std::vector<LineData> data;
-  };
-  struct Frame {
-    LineNode *node;
-    uint32_t index;
-  };
-  void push(LineNode *n, uint32_t x) {
-    stack[stack_size].node = n;
-    stack[stack_size].index = x;
-    stack_size++;
-  }
-  static void clear_node(LineNode *n) {
-    if (!n)
-      return;
-    clear_node(n->left);
-    clear_node(n->right);
-    delete n;
-  }
-  LineNode *root = nullptr;
-  Frame stack[32];
-  std::atomic<uint8_t> stack_size = 0;
-  static constexpr uint32_t LEAF_TARGET = 256;
-  LineTree::LineNode *erase_node(LineNode *n, uint32_t x, uint32_t y) {
-    if (!n || y == 0)
-      return n;
-    uint32_t left_sz = subtree_size(n->left);
-    uint32_t mid_sz = n->data.size();
-    if (x < left_sz) {
-      uint32_t len = std::min(y, left_sz - x);
-      n->left = erase_node(n->left, x, len);
-      y -= len;
-      x = left_sz;
-    }
-    if (y > 0 && x < left_sz + mid_sz) {
-      uint32_t mid_x = x - left_sz;
-      uint32_t len = std::min(y, mid_sz - mid_x);
-      n->data.erase(n->data.begin() + mid_x, n->data.begin() + mid_x + len);
-      y -= len;
-      x += len;
-    }
-    if (y > 0) {
-      n->right = erase_node(n->right, x - left_sz - n->data.size(), y);
-    }
-    if (n->left && n->right &&
-        subtree_size(n->left) + subtree_size(n->right) < 256) {
-      return merge(n->left, n->right);
-    }
-    return rebalance(n);
-  }
-  LineTree::LineNode *insert_node(LineNode *n, uint32_t x, uint32_t y) {
-    if (!n) {
-      auto *leaf = new LineNode();
-      leaf->data.resize(y);
-      leaf->size = y;
-      return leaf;
-    }
-    if (!n->left && !n->right) {
-      n->data.insert(n->data.begin() + x, y, LineData());
-      fix(n);
-      if (n->data.size() > 512)
-        return split_leaf(n);
-      return n;
-    }
-    uint32_t left_size = subtree_size(n->left);
-    if (x <= left_size)
-      n->left = insert_node(n->left, x, y);
-    else
-      n->right = insert_node(n->right, x - left_size - n->data.size(), y);
-    return rebalance(n);
-  }
-  LineNode *build_node(uint32_t count) {
-    if (count <= LEAF_TARGET) {
-      auto *n = new LineNode();
-      n->data.resize(count);
-      n->size = count;
-      return n;
-    }
-    uint32_t left_count = count / 2;
-    uint32_t right_count = count - left_count;
-    auto *n = new LineNode();
-    n->left = build_node(left_count);
-    n->right = build_node(right_count);
-    fix(n);
-    return n;
-  }
-  static LineNode *split_leaf(LineNode *n) {
-    auto *right = new LineNode();
-    size_t mid = n->data.size() / 2;
-    right->data.assign(n->data.begin() + mid, n->data.end());
-    n->data.resize(mid);
-    fix(n);
-    fix(right);
-    auto *parent = new LineNode();
-    parent->left = n;
-    parent->right = right;
-    fix(parent);
-    return parent;
-  }
-  static LineNode *merge(LineNode *a, LineNode *b) {
-    a->data.insert(a->data.end(), b->data.begin(), b->data.end());
-    delete b;
-    fix(a);
-    return a;
-  }
-  static void fix(LineNode *n) {
-    n->depth = 1 + MAX(height(n->left), height(n->right));
-    n->size = subtree_size(n->left) + n->data.size() + subtree_size(n->right);
-  }
-  static LineNode *rotate_right(LineNode *y) {
-    LineNode *x = y->left;
-    LineNode *T2 = x->right;
-    x->right = y;
-    y->left = T2;
-    fix(y);
-    fix(x);
-    return x;
-  }
-  static LineNode *rotate_left(LineNode *x) {
-    LineNode *y = x->right;
-    LineNode *T2 = y->left;
-    y->left = x;
-    x->right = T2;
-    fix(x);
-    fix(y);
-    return y;
-  }
-  static LineNode *rebalance(LineNode *n) {
-    fix(n);
-    int balance = int(height(n->left)) - int(height(n->right));
-    if (balance > 1) {
-      if (height(n->left->left) < height(n->left->right))
-        n->left = rotate_left(n->left);
-      return rotate_right(n);
-    }
-    if (balance < -1) {
-      if (height(n->right->right) < height(n->right->left))
-        n->right = rotate_right(n->right);
-      return rotate_left(n);
-    }
-    return n;
-  }
-  static uint8_t height(LineNode *n) { return n ? n->depth : 0; }
-  static uint32_t subtree_size(LineNode *n) { return n ? n->size : 0; }
-};
-
-#endif

include/syntax/parser.h

@@ -3,24 +3,22 @@
 
 #include "ruby/decl.h"
 #include "syntax/decl.h"
-#include "syntax/line_tree.h"
+#include "syntax/line_map.h"
 
 struct Parser {
   struct Editor *editor = nullptr;
   std::string lang;
-  std::shared_ptr<void> (*parse_func)(std::vector<Token> *tokens,
+  std::unique_ptr<StateBase> (*parse_func)(std::vector<Token> *tokens,
-                                      std::shared_ptr<void> in_state,
+                                           StateBase *in_state,
-                                      const char *text, uint32_t len,
+                                           const char *text, uint32_t len,
-                                      uint32_t line_num);
+                                           uint32_t line_num);
-  bool (*state_match_func)(std::shared_ptr<void> state_1,
+  bool (*state_match_func)(StateBase *state_1, StateBase *state_2);
-                           std::shared_ptr<void> state_2);
   mrb_value parser_block = mrb_nil_value();
   mrb_value match_block = mrb_nil_value();
   bool is_custom{false};
   std::atomic<uint32_t> scroll_max{0};
   std::atomic<bool> scroll_dirty{false};
-  LineTree line_tree;
+  LineMap line_map = LineMap();
-  UniqueQueue<uint32_t> dirty_lines;
 
   Parser(Editor *editor, std::string n_lang, uint32_t n_scroll_max);
   void edit(uint32_t start_line, uint32_t removed_rows, uint32_t inserted_rows);

include/tiling/decl.h

@@ -1,10 +0,0 @@
-#ifndef TILING_DECL_H
-#define TILING_DECL_H
-
-#include "utils/utils.h"
-
-struct Window {};
-
-struct TileBlock {};
-
-#endif

include/ui/bar.h

@@ -12,8 +12,9 @@ struct Bar {
   uint32_t cursor = 0;
 
   void init(Coord screen) { this->screen = screen; }
-  void render();
+  void render(std::vector<ScreenCell> &buffer);
-  void handle(KeyEvent event);
+  void handle_event(KeyEvent event);
+  void handle_command(std::string &command);
   void log(std::string message);
 };
 

include/ui/completionbox.h

@@ -1,21 +0,0 @@
-#ifndef UI_COMPLETIONBOX_H
-#define UI_COMPLETIONBOX_H
-
-#include "io/sysio.h"
-#include "pch.h"
-#include "utils/utils.h"
-
-struct CompletionBox {
-  std::shared_mutex mtx;
-  struct CompletionSession *session;
-  bool hidden = true;
-  std::vector<ScreenCell> cells;
-  Coord size;
-  Coord position;
-
-  CompletionBox(CompletionSession *s) : session(s) {}
-  void render_update();
-  void render(Coord pos);
-};
-
-#endif

include/ui/diagnostics.h

@@ -1,19 +0,0 @@
-#ifndef UI_DIAGNOSTICS_H
-#define UI_DIAGNOSTICS_H
-
-#include "editor/decl.h"
-#include "io/sysio.h"
-#include "pch.h"
-#include "utils/utils.h"
-
-struct DiagnosticBox {
-  std::vector<VWarn> warnings;
-  std::vector<ScreenCell> cells;
-  Coord size;
-
-  void clear();
-  void render_first();
-  void render(Coord pos);
-};
-
-#endif

include/ui/hover.h

@@ -1,22 +0,0 @@
-#ifndef UI_HOVER_H
-#define UI_HOVER_H
-
-#include "editor/decl.h"
-#include "io/sysio.h"
-#include "pch.h"
-#include "utils/utils.h"
-
-struct HoverBox {
-  std::string text;
-  std::atomic<bool> is_markup;
-  uint32_t scroll_;
-  std::vector<ScreenCell> cells;
-  Coord size;
-
-  void clear();
-  void scroll(int32_t number);
-  void render_first(bool scroll = false);
-  void render(Coord pos);
-};
-
-#endif

include/utils/utils.h

@@ -6,18 +6,19 @@
 template <typename T> struct Queue {
   void push(T val) {
     std::lock_guard<std::mutex> lock(m);
-    q.push(val);
+    q.push(std::move(val));
   }
   std::optional<T> front() {
+    std::lock_guard<std::mutex> lock(m);
     if (q.empty())
       return std::nullopt;
-    return q.front();
+    return std::move(q.front());
   }
   bool pop(T &val) {
     std::lock_guard<std::mutex> lock(m);
     if (q.empty())
       return false;
-    val = q.front();
+    val = std::move(q.front());
     q.pop();
     return true;
   }
@@ -92,6 +93,11 @@ struct Coord {
   bool operator>=(const Coord &other) const { return !(*this < other); }
 };
 
+static inline bool inside(Coord c, Coord pos, Coord size) {
+  return c.row >= pos.row && c.col >= pos.col && c.row - pos.row < size.row &&
+         c.col - pos.col < size.col;
+}
+
 struct Match {
   size_t start;
   size_t end;
@@ -132,6 +138,7 @@ std::string percent_encode(const std::string &s);
 std::string percent_decode(const std::string &s);
 uint32_t count_clusters(const char *line, size_t len, size_t from, size_t to);
 std::string trim(const std::string &s);
+std::string strip_newlines(const std::string &s);
 std::string substitute_fence(const std::string &documentation,
                              const std::string &lang);
 

include/windows/decl.h

@@ -0,0 +1,119 @@
+#ifndef TILING_DECL_H
+#define TILING_DECL_H
+
+#include "io/sysio.h"
+#include "utils/utils.h"
+
+struct Tile {
+  bool hidden = false;
+  uint32_t weight = 100;
+
+  virtual void render(std::vector<ScreenCell> &buffer, Coord size,
+                      Coord pos) = 0;
+  virtual void handle_click(KeyEvent event, Coord size) = 0;
+  virtual ~Tile() = default;
+};
+
+struct Window : Tile {
+  virtual ~Window() = default;
+  virtual void handle_event(KeyEvent){};
+  virtual void handle_command(std::string &) {};
+  virtual void work() {};
+  virtual std::array<std::string, 5> bar_info() { return {}; };
+};
+
+struct Popup : Window {
+  Coord pos;
+  Coord size;
+  virtual ~Popup() = default;
+};
+
+struct TileBlock : Tile {
+  bool vertical;
+  std::vector<std::unique_ptr<Tile>> tiles;
+
+  void render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) override {
+    uint32_t total_weight = 0;
+    for (auto &t : tiles) {
+      if (!t->hidden)
+        total_weight += t->weight;
+    }
+    if (total_weight == 0)
+      return;
+    for (auto &t : tiles) {
+      if (t->hidden)
+        continue;
+      uint32_t proportion =
+          t->weight * (vertical ? size.row : size.col) / total_weight;
+      Coord tile_size = vertical ? Coord{.row = proportion, .col = size.col}
+                                 : Coord{.row = size.row, .col = proportion};
+      t->render(buffer, tile_size, pos);
+      if (vertical)
+        pos.row += tile_size.row;
+      else
+        pos.col += tile_size.col;
+    }
+  }
+
+  void handle_click(KeyEvent event, Coord size) override {
+    uint32_t total_weight = 0;
+    for (auto &t : tiles)
+      if (!t->hidden)
+        total_weight += t->weight;
+    if (total_weight == 0)
+      return;
+    uint32_t i = 0;
+    for (auto &t : tiles) {
+      if (t->hidden)
+        continue;
+      uint32_t proportion =
+          t->weight * (vertical ? size.row : size.col) / total_weight;
+      Coord tile_size = vertical ? Coord{.row = proportion, .col = size.col}
+                                 : Coord{.row = size.row, .col = proportion};
+      if (vertical) {
+        if (event.mouse_y < i + proportion) {
+          event.mouse_y -= i;
+          t->handle_click(event, tile_size);
+          return;
+        }
+      } else {
+        if (event.mouse_x < i + proportion) {
+          event.mouse_x -= i;
+          t->handle_click(event, tile_size);
+          return;
+        }
+      }
+      i += proportion;
+    }
+  }
+};
+
+struct TileBase {
+  std::unique_ptr<Tile> tile;
+  Coord pos;
+  Coord size;
+
+  inline bool hidden() { return this->tile->hidden; }
+  void render(std::vector<ScreenCell> &buffer) {
+    if (this->tile->hidden)
+      return;
+    this->tile->render(buffer, size, pos);
+  }
+  void handle_click(KeyEvent event) {
+    event.mouse_x -= this->pos.col;
+    event.mouse_y -= this->pos.row;
+    this->tile->handle_click(event, size);
+  }
+};
+
+namespace layout {
+extern TileBase root_tile;
+extern Window *focused_window;
+extern std::vector<std::unique_ptr<Popup>> popups;
+extern std::vector<std::unique_ptr<TileBase>> floating_tiles;
+} // namespace layout
+
+void render();
+void handle_click(KeyEvent event);
+
+#endif

samples/bash.sh

@@ -25,6 +25,7 @@ colorize() {
 handle_error() {
   log ERROR "An error occurred on line $1"
 }
+
 trap 'handle_error $LINENO' ERR
 # Multiline string test
 read -r -d '' MULTI <<'CPP'

samples/ruby.rb

@@ -339,6 +339,5 @@ puts 'Ruby syntax highlighting test complete.'
 
 __END__
 
-
 Anything here should be ignored >><<
 {{{}}}[[[]]](((000)))

src/editor/adjustment.cc

@@ -1,83 +1,39 @@
 #include "editor/editor.h"
 
-void ensure_cursor(Editor *editor) {
+void Editor::ensure_cursor() {
-  std::shared_lock knot_lock(editor->knot_mtx);
+  if (this->cursor < this->scroll) {
-  if (editor->cursor < editor->scroll) {
+    this->cursor = this->scroll;
-    editor->cursor.row = editor->scroll.row;
+    this->cursor_preffered = UINT32_MAX;
-    editor->cursor.col = editor->scroll.col;
-    editor->cursor_preffered = UINT32_MAX;
     return;
   }
   uint32_t numlen =
-      EXTRA_META + static_cast<int>(std::log10(editor->root->line_count + 1));
+      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
-  uint32_t render_width = editor->size.col - numlen;
+  uint32_t render_width = this->size.col - numlen;
-  uint32_t visual_rows = 0;
+  uint32_t render_height = 0;
-  uint32_t line_index = editor->scroll.row;
+  VisualIterator vis(root, scroll, render_width);
-  bool first_visual_line = true;
+  std::pair<Coord, Coord> vline;
-  LineIterator *it = begin_l_iter(editor->root, line_index);
+  Coord last_visible = scroll;
-  if (!it)
+  while ((vline = vis.next()).first.row != UINT32_MAX &&
-    return;
+         render_height < this->size.row) {
-  Coord last_visible = editor->scroll;
+    render_height++;
-  while (true) {
+    last_visible = vline.first;
-    if (visual_rows >= editor->size.row)
+    log("Render H: %d, Cursor: %d,%d, Visible: %d,%d - %d,%d", render_height,
-      break;
+        this->cursor.row, this->cursor.col, vline.first.row, vline.first.col,
-    uint32_t line_len;
+        vline.second.row, vline.second.col);
-    char *line = next_line(it, &line_len);
+    if (cursor >= vline.first && cursor <= vline.second)
-    if (!line)
+      return;
-      break;
-    if (line_len > 0 && line[line_len - 1] == '\n')
-      line_len--;
-    uint32_t offset = first_visual_line ? editor->scroll.col : 0;
-    first_visual_line = false;
-    while (offset < line_len || (line_len == 0 && offset == 0)) {
-      Coord current = {line_index, offset};
-      last_visible = current;
-      visual_rows++;
-      if (visual_rows >= editor->size.row)
-        break;
-      uint32_t col = 0;
-      uint32_t advance = 0;
-      uint32_t left = line_len - offset;
-      while (left > 0 && col < render_width) {
-        uint32_t g =
-            grapheme_next_character_break_utf8(line + offset + advance, left);
-        int w = display_width(line + offset + advance, g);
-        if (col + w > render_width)
-          break;
-        advance += g;
-        left -= g;
-        col += w;
-      }
-      if (line_index == editor->cursor.row) {
-        if (editor->cursor.col >= offset &&
-            editor->cursor.col <= offset + advance) {
-          free(it->buffer);
-          free(it);
-          return;
-        }
-      }
-      if (advance == 0)
-        break;
-      offset += advance;
-      if (line_len == 0)
-        break;
-    }
-    line_index++;
   }
-  editor->cursor.row = last_visible.row;
+  cursor = last_visible;
-  editor->cursor.col = last_visible.col;
+  cursor_preffered = UINT32_MAX;
-  editor->cursor_preffered = UINT32_MAX;
+  this->cursor_preffered = UINT32_MAX;
-  free(it->buffer);
-  free(it);
 }
 
-void ensure_scroll(Editor *editor) {
+void Editor::ensure_scroll() {
-  std::shared_lock knot_lock(editor->knot_mtx);
   uint32_t numlen =
-      EXTRA_META + static_cast<int>(std::log10(editor->root->line_count + 1));
+      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
-  uint32_t render_width = editor->size.col - numlen;
+  uint32_t render_width = this->size.col - numlen;
-  if (editor->cursor < editor->scroll) {
+  if (this->cursor < this->scroll) {
-    LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+    LineIterator *it = begin_l_iter(this->root, this->cursor.row);
     if (!it)
       return;
     uint32_t len;
@@ -98,9 +54,9 @@ void ensure_scroll(Editor *editor) {
       int width = display_width(line + offset, inc);
       if (cols + width > render_width) {
         cols = 0;
-        if (editor->cursor.col > old_offset && editor->cursor.col <= offset) {
+        if (this->cursor.col > old_offset && this->cursor.col <= offset) {
-          editor->scroll.row = editor->cursor.row;
+          this->scroll.row = this->cursor.row;
-          editor->scroll.col = old_offset;
+          this->scroll.col = old_offset;
           free(it->buffer);
           free(it);
           return;
@@ -112,14 +68,14 @@ void ensure_scroll(Editor *editor) {
     }
     free(it->buffer);
     free(it);
-    editor->scroll.row = editor->cursor.row;
+    this->scroll.row = this->cursor.row;
-    editor->scroll.col = (editor->cursor.col == 0) ? 0 : old_offset;
+    this->scroll.col = (this->cursor.col == 0) ? 0 : old_offset;
-  } else if (editor->cursor.row - editor->scroll.row < editor->size.row * 2) {
+  } else if (this->cursor.row - this->scroll.row < this->size.row * 2) {
-    uint32_t line_index = editor->scroll.row;
+    uint32_t line_index = this->scroll.row;
-    LineIterator *it = begin_l_iter(editor->root, line_index);
+    LineIterator *it = begin_l_iter(this->root, line_index);
     if (!it)
       return;
-    uint32_t max_visual_lines = editor->size.row;
+    uint32_t max_visual_lines = this->size.row;
     Coord *scroll_queue = (Coord *)malloc(sizeof(Coord) * max_visual_lines);
     uint32_t q_head = 0;
     uint32_t q_size = 0;
@@ -133,7 +89,7 @@ void ensure_scroll(Editor *editor) {
         line_len--;
       uint32_t current_byte_offset = 0;
       if (first_visual_line) {
-        current_byte_offset += editor->scroll.col;
+        current_byte_offset += this->scroll.col;
         first_visual_line = false;
       }
       while (current_byte_offset < line_len ||
@@ -160,16 +116,16 @@ void ensure_scroll(Editor *editor) {
           line_left -= cluster_len;
           col += width;
         }
-        if (line_index == editor->cursor.row) {
+        if (line_index == this->cursor.row) {
           bool cursor_found = false;
-          if (editor->cursor.col >= current_byte_offset &&
+          if (this->cursor.col >= current_byte_offset &&
-              editor->cursor.col < current_byte_offset + local_render_offset)
+              this->cursor.col < current_byte_offset + local_render_offset)
             cursor_found = true;
-          else if (editor->cursor.col == line_len &&
+          else if (this->cursor.col == line_len &&
                    current_byte_offset + local_render_offset == line_len)
             cursor_found = true;
           if (cursor_found) {
-            editor->scroll = scroll_queue[q_head];
+            this->scroll = scroll_queue[q_head];
             free(scroll_queue);
             free(it->buffer);
             free(it);
@@ -186,10 +142,10 @@ void ensure_scroll(Editor *editor) {
     free(it->buffer);
     free(it);
   } else {
-    editor->scroll.row = (editor->cursor.row > editor->size.row * 1.5)
+    this->scroll.row = (this->cursor.row > this->size.row * 1.5)
-                             ? editor->cursor.row - editor->size.row * 1.5
+                           ? this->cursor.row - this->size.row * 1.5
-                             : 0;
+                           : 0;
-    editor->scroll.col = 0;
+    this->scroll.col = 0;
-    ensure_scroll(editor);
+    this->ensure_scroll();
   }
 }

src/editor/boundaries.cc

@@ -32,12 +32,9 @@ uint32_t scan_right(const char *line, uint32_t len, uint32_t off) {
   return i;
 }
 
-void word_boundaries_exclusive(Editor *editor, Coord coord, uint32_t *prev_col,
+void Editor::word_boundaries_exclusive(Coord coord, uint32_t *prev_col,
-                               uint32_t *next_col) {
+                                       uint32_t *next_col) {
-  if (!editor)
+  LineIterator *it = begin_l_iter(this->root, coord.row);
-    return;
-  std::shared_lock lock(editor->knot_mtx);
-  LineIterator *it = begin_l_iter(editor->root, coord.row);
   if (!it)
     return;
   uint32_t line_len;
@@ -85,13 +82,10 @@ uint32_t word_jump_left(const char *line, size_t len, uint32_t col) {
   return static_cast<uint32_t>(last);
 }
 
-void word_boundaries(Editor *editor, Coord coord, uint32_t *prev_col,
+void Editor::word_boundaries(Coord coord, uint32_t *prev_col,
-                     uint32_t *next_col, uint32_t *prev_clusters,
+                             uint32_t *next_col, uint32_t *prev_clusters,
-                     uint32_t *next_clusters) {
+                             uint32_t *next_clusters) {
-  if (!editor)
+  LineIterator *it = begin_l_iter(this->root, coord.row);
-    return;
-  std::shared_lock lock(editor->knot_mtx);
-  LineIterator *it = begin_l_iter(editor->root, coord.row);
   if (!it)
     return;
   uint32_t line_len;

src/editor/click.cc

@@ -1,23 +1,19 @@
 #include "editor/editor.h"
-#include "main.h"
 
-Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
+Coord Editor::click_coord(uint32_t x, uint32_t y) {
-  if (mode == INSERT)
-    x++;
   uint32_t numlen =
-      EXTRA_META + static_cast<int>(std::log10(editor->root->line_count + 1));
+      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
-  uint32_t render_width = editor->size.col - numlen;
+  uint32_t render_width = this->size.col - numlen;
-  x = MAX(x, numlen) - numlen + 1;
+  x = MAX(x, numlen) - numlen - 1;
   uint32_t target_visual_row = y;
   uint32_t visual_row = 0;
-  uint32_t line_index = editor->scroll.row;
+  uint32_t line_index = this->scroll.row;
-  uint32_t last_line_index = editor->scroll.row;
+  uint32_t last_line_index = this->scroll.row;
-  uint32_t last_col = editor->scroll.col;
+  uint32_t last_col = this->scroll.col;
   bool first_visual_line = true;
-  std::shared_lock knot_lock(editor->knot_mtx);
+  LineIterator *it = begin_l_iter(this->root, line_index);
-  LineIterator *it = begin_l_iter(editor->root, line_index);
   if (!it)
-    return editor->scroll;
+    return this->scroll;
   while (visual_row <= target_visual_row) {
     uint32_t line_len;
     char *line = next_line(it, &line_len);
@@ -27,7 +23,7 @@ Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
       line_len--;
     last_line_index = line_index;
     last_col = line_len;
-    uint32_t offset = first_visual_line ? editor->scroll.col : 0;
+    uint32_t offset = first_visual_line ? this->scroll.col : 0;
     first_visual_line = false;
     while (offset < line_len || (line_len == 0 && offset == 0)) {
       uint32_t col = 0;

src/editor/commands.cc

@@ -0,0 +1,13 @@
+#include "editor/editor.h"
+#include "main.h"
+
+void Editor::handle_command(std::string &command) {
+  if (command == "w") {
+    this->save();
+  }
+  if (command == "wq") {
+    this->save();
+    command = "q";
+    ui::bar.handle_command(command);
+  }
+}

src/editor/completions.cc

@@ -1,9 +1,8 @@
-#include "editor/decl.h"
+/* #include "editor/editor.h"
-#include "editor/editor.h"
 #include "io/knot.h"
 #include "io/sysio.h"
-#include "lsp/lsp.h"
 #include "main.h"
+#include "ui/completionbox.h"
 #include "utils/utils.h"
 
 inline static std::string completion_prefix(Editor *editor) {
@@ -68,11 +67,9 @@ void completion_filter(Editor *editor) {
 
 void completion_request(Editor *editor) {
   Coord hook = editor->cursor;
-  word_boundaries(editor, editor->cursor, &hook.col, nullptr, nullptr, nullptr);
+  editor->word_boundaries(editor->cursor, &hook.col, nullptr, nullptr,
-  editor->completion.hook = hook;
+  nullptr); editor->completion.hook = hook; editor->completion.complete =
-  editor->completion.complete = false;
+  false; editor->completion.active = false; editor->completion.items.clear();
-  editor->completion.active = false;
-  editor->completion.items.clear();
   editor->completion.visible.clear();
   editor->completion.select = 0;
   editor->completion.version = editor->lsp_version;
@@ -100,7 +97,8 @@ void completion_request(Editor *editor) {
           return;
         editor->completion.active = true;
         session.complete = !list.value("isIncomplete", false);
-        if (list.contains("itemDefaults") && list["itemDefaults"].is_object()) {
+        if (list.contains("itemDefaults") &&
+        list["itemDefaults"].is_object()) {
           auto &defs = list["itemDefaults"];
           if (defs.contains("insertTextFormat") &&
               defs["insertTextFormat"].is_number())
@@ -198,7 +196,7 @@ void completion_request(Editor *editor) {
         edit.start = session.hook;
         edit.end = editor->cursor;
       }
-      utf8_normalize_edit(editor, &edit);
+      editor->utf8_normalize_edit(&edit);
       item.edits.push_back(edit);
       if (item_json.contains("additionalTextEdits")) {
         for (auto &te : item_json["additionalTextEdits"]) {
@@ -208,7 +206,7 @@ void completion_request(Editor *editor) {
           edit.start.col = te["range"]["start"]["character"];
           edit.end.row = te["range"]["end"]["line"];
           edit.end.col = te["range"]["end"]["character"];
-          utf8_normalize_edit(editor, &edit);
+          editor->utf8_normalize_edit(&edit);
           item.edits.push_back(edit);
         }
       }
@@ -227,7 +225,6 @@ void completion_request(Editor *editor) {
     session.box.hidden = false;
     session.box.render_update();
   };
-  std::shared_lock lock(editor->knot_mtx);
   LineIterator *it = begin_l_iter(editor->root, hook.row);
   uint32_t length;
   char *line = next_line(it, &length);
@@ -239,7 +236,6 @@ void completion_request(Editor *editor) {
   uint32_t col = utf8_offset_to_utf16(line, length, editor->cursor.col);
   free(it->buffer);
   free(it);
-  lock.unlock();
   json message = {
       {"jsonrpc", "2.0"},
       {"method", "textDocument/completion"},
@@ -256,103 +252,105 @@ void completion_request(Editor *editor) {
   lsp_send(editor->lsp, message, pending);
 }
 
-void handle_completion(Editor *editor, KeyEvent event) {
+Move this into the box and merge the box and this guy
+void CompletionSession::handle(KeyEvent event) {
   if (!editor->lsp || !editor->lsp->allow_completion)
     return;
   if (mode != INSERT) {
-    editor->completion.active = false;
+    this->active = false;
     return;
   }
-  std::unique_lock lock(editor->completion.mtx);
+  std::unique_lock lock(this->mtx);
   if (event.key_type == KEY_PASTE) {
-    editor->completion.active = false;
+    this->active = false;
     return;
   } else if (event.key_type == KEY_CHAR) {
     char ch = *event.c;
-    if (!editor->completion.active) {
+    if (!this->active) {
       for (char c : editor->lsp->trigger_chars)
         if (c == ch) {
-          editor->completion.trigger = 2;
+          this->trigger = 2;
-          editor->completion.trigger_char = c;
+          this->trigger_char = c;
           completion_request(editor);
           return;
         }
     } else {
       if (!editor->completion.items.empty()) {
-        const auto &item = editor->completion.items[editor->completion.select];
+        const auto &item =
-        const std::vector<char> &end_chars =
+        editor->completion.items[editor->completion.select]; const
+        std::vector<char> &end_chars =
             item.end_chars.empty() ? editor->lsp->end_chars : item.end_chars;
         for (char c : end_chars)
           if (c == ch) {
-            complete_accept(editor);
+            this->accept();
             return;
           }
       }
     }
     if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
         (ch >= '0' && ch <= '9') || ch == '_') {
-      if (editor->completion.active) {
+      if (this->active) {
-        if (editor->completion.complete)
+        if (this->complete)
           completion_filter(editor);
         else
           completion_request(editor);
       } else {
-        editor->completion.trigger = 3;
+        this->trigger = 3;
         completion_request(editor);
       }
     } else if (ch == CTRL('\\')) {
-      if (editor->completion.active && !editor->completion.visible.empty()) {
+      if (this->active && !this->visible.empty()) {
-        complete_accept(editor);
+        this->accept();
       } else {
-        editor->completion.trigger = 1;
+        this->trigger = 1;
         completion_request(editor);
       }
     } else if (ch == CTRL('p')) {
-      if (editor->completion.active)
+      if (this->active)
-        complete_next(editor);
+        this->next();
     } else if (ch == CTRL('o')) {
-      if (editor->completion.active)
+      if (this->active)
-        complete_prev(editor);
+        this->prev();
     } else if (ch == 0x7F || ch == 0x08 || ch == CTRL('W')) {
-      if (editor->completion.active) {
+      if (this->active) {
-        if (editor->completion.complete) {
+        if (this->complete) {
-          if (editor->cursor <= editor->completion.hook)
+          if (editor->cursor <= this->hook)
-            editor->completion.active = false;
+            this->active = false;
           else
             completion_filter(editor);
         } else {
-          if (editor->cursor <= editor->completion.hook)
+          if (editor->cursor <= this->hook)
-            editor->completion.active = false;
+            this->active = false;
           else
             completion_request(editor);
         }
       }
     } else {
-      editor->completion.active = false;
+      this->active = false;
     }
   } else if (event.key_type == KEY_MOUSE && event.mouse_modifier == 0) {
-    // Prolly remove mouse support here
+    Prolly add mouse support here
-    // auto &box = editor->completion.box;
+    auto &box = this->box;
-    // if (event.mouse_y >= box.position.row &&
+    if (event.mouse_y >= box.position.row &&
-    //     event.mouse_x >= box.position.col) {
+        event.mouse_x >= box.position.col) {
-    //   uint32_t row = event.mouse_y - box.position.row;
+      uint32_t row = event.mouse_y - box.position.row;
-    //   uint32_t col = event.mouse_x - box.position.col;
+      uint32_t col = event.mouse_x - box.position.col;
-    //   if (row < box.size.row && col < box.size.col) {
+      if (row < box.size.row && col < box.size.col) {
-    //     uint8_t idx = 0;
+        uint8_t idx = 0;
-    //     /* TODO: fix index relative to scroll */
+        complete_select(editor, idx);
-    //     complete_select(editor, idx);
+      }
-    //   }
+    }
-    // }
+    if it is being implemented then stop main event handler from
-    // if it is being implemented then stop main event handler from processing
+    processing
-    // when click inside the box
+        when click inside the box
-    editor->completion.active = false;
+        this->active = false;
   } else {
-    editor->completion.active = false;
+    this->active = false;
   }
 }
 
-void completion_resolve_doc(Editor *editor) {
+void CompletionSession::resolve_doc() {
-  auto &item = editor->completion.items[editor->completion.select];
+  auto &item = this->items[this->select];
   if (item.documentation)
     return;
   item.documentation = "";
@@ -390,13 +388,13 @@ void completion_resolve_doc(Editor *editor) {
   lsp_send(editor->lsp, message, pending);
 }
 
-void complete_accept(Editor *editor) {
+void CompletionSession::accept() {
-  if (!editor->completion.active || editor->completion.box.hidden)
+  if (!this->active || this->box.hidden)
     return;
-  auto &item = editor->completion.items[editor->completion.select];
+  auto &item = this->items[this->select];
-  // TODO: support snippets and asis here
+  TODO: support snippets and asis here
-  //       once indentation engine is implemented
+        once indentation engine is implemented
-  if (editor->completion.version != editor->lsp_version) {
+  if (this->version != editor->lsp_version) {
     int delta_col = 0;
     TextEdit &e = item.edits[0];
     if (e.end.row == editor->cursor.row) {
@@ -412,8 +410,8 @@ void complete_accept(Editor *editor) {
       }
     }
   }
-  apply_lsp_edits(editor, item.edits, true);
+  editor->apply_lsp_edits(item.edits, true);
-  editor->completion.active = false;
+  this->active = false;
 }
 
 inline static int visible_index(const CompletionSession &s) {
@@ -423,37 +421,36 @@ inline static int visible_index(const CompletionSession &s) {
   return -1;
 }
 
-void complete_next(Editor *editor) {
+void CompletionSession::next() {
-  auto &s = editor->completion;
+  if (!this->active || this->box.hidden || this->visible.empty())
-  if (!s.active || s.box.hidden || s.visible.empty())
     return;
-  int vi = visible_index(s);
+  int vi = visible_index(*this);
   if (vi < 0)
     vi = 0;
   else
-    vi = (vi + 1) % s.visible.size();
+    vi = (vi + 1) % this->visible.size();
-  s.select = s.visible[vi];
+  this->select = this->visible[vi];
-  completion_resolve_doc(editor);
+  this->resolve_doc();
-  completion_adjust_scroll(editor->completion);
+  completion_adjust_scroll(*this);
-  editor->completion.box.render_update();
+  this->box.render_update();
 }
 
-void complete_prev(Editor *editor) {
+void CompletionSession::prev() {
-  auto &s = editor->completion;
+  if (!this->active || this->box.hidden || this->visible.empty())
-  if (!s.active || s.box.hidden || s.visible.empty())
     return;
-  int vi = visible_index(s);
+  int vi = visible_index(*this);
   if (vi < 0)
     vi = 0;
   else
-    vi = (vi + s.visible.size() - 1) % s.visible.size();
+    vi = (vi + this->visible.size() - 1) % this->visible.size();
-  s.select = s.visible[vi];
+  this->select = this->visible[vi];
-  completion_resolve_doc(editor);
+  this->resolve_doc();
-  completion_adjust_scroll(editor->completion);
+  completion_adjust_scroll(*this);
-  editor->completion.box.render_update();
+  this->box.render_update();
 }
 
-void complete_select(Editor *editor, uint8_t index) {
+void CompletionSession::choose(uint8_t index) {
-  editor->completion.select = index;
+  this->select = index;
-  complete_accept(editor);
+  this->accept();
 }
+ */

src/editor/cursor.cc

@@ -1,14 +1,14 @@
 #include "editor/editor.h"
 #include "utils/utils.h"
 
-Coord move_right(Editor *editor, Coord cursor, uint32_t number) {
+Coord Editor::move_right(Coord cursor, uint32_t number) {
   Coord result = cursor;
-  if (!editor || !editor->root || number == 0)
+  if (!this->root || number == 0)
     return result;
   uint32_t row = result.row;
   uint32_t col = result.col;
   uint32_t line_len = 0;
-  LineIterator *it = begin_l_iter(editor->root, row);
+  LineIterator *it = begin_l_iter(this->root, row);
   if (!it)
     return result;
   char *line = next_line(it, &line_len);
@@ -22,7 +22,7 @@ Coord move_right(Editor *editor, Coord cursor, uint32_t number) {
   while (number > 0) {
     if (col >= line_len) {
       uint32_t next_row = row + 1;
-      if (next_row >= editor->root->line_count) {
+      if (next_row >= this->root->line_count) {
         col = line_len;
         break;
       }
@@ -49,14 +49,16 @@ Coord move_right(Editor *editor, Coord cursor, uint32_t number) {
   return result;
 }
 
-Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
+Coord Editor::move_left(Coord cursor, uint32_t number) {
   Coord result = cursor;
-  if (!editor || !editor->root || number == 0)
+  if (!this->root || number == 0)
     return result;
   uint32_t row = result.row;
   uint32_t col = result.col;
   uint32_t len = 0;
-  LineIterator *it = begin_l_iter(editor->root, row);
+  LineIterator *it = begin_l_iter(this->root, row);
+  if (!it)
+    return result;
   char *line = next_line(it, &len);
   if (!line) {
     free(it->buffer);
@@ -102,29 +104,28 @@ Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
   return result;
 }
 
-void cursor_down(Editor *editor, uint32_t number) {
+void Editor::cursor_down(uint32_t number) {
-  if (!editor || !editor->root || number == 0)
+  if (!this->root || number == 0)
     return;
-  uint32_t visual_col = editor->cursor_preffered;
+  uint32_t visual_col = this->cursor_preffered;
   if (visual_col == UINT32_MAX) {
     uint32_t len;
-    LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+    LineIterator *it = begin_l_iter(this->root, this->cursor.row);
     char *line = next_line(it, &len);
     if (!line) {
       free(it->buffer);
       free(it);
       return;
     }
-    editor->cursor_preffered =
+    this->cursor_preffered =
-        get_visual_col_from_bytes(line, len, editor->cursor.col);
+        get_visual_col_from_bytes(line, len, this->cursor.col);
-    visual_col = editor->cursor_preffered;
+    visual_col = this->cursor_preffered;
     free(it->buffer);
     free(it);
   }
-  editor->cursor.row =
+  this->cursor.row = MIN(this->cursor.row + number, this->root->line_count - 1);
-      MIN(editor->cursor.row + number, editor->root->line_count - 1);
   uint32_t len;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  LineIterator *it = begin_l_iter(this->root, this->cursor.row);
   char *line = next_line(it, &len);
   if (!line) {
     free(it->buffer);
@@ -133,26 +134,26 @@ void cursor_down(Editor *editor, uint32_t number) {
   }
   if (len > 0 && line[len - 1] == '\n')
     --len;
-  editor->cursor.col = get_bytes_from_visual_col(line, len, visual_col);
+  this->cursor.col = get_bytes_from_visual_col(line, len, visual_col);
   free(it->buffer);
   free(it);
 }
 
-void cursor_up(Editor *editor, uint32_t number) {
+void Editor::cursor_up(uint32_t number) {
-  if (!editor || !editor->root || number == 0 || editor->cursor.row == 0)
+  if (!this->root || number == 0 || this->cursor.row == 0)
     return;
   uint32_t len;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  LineIterator *it = begin_l_iter(this->root, this->cursor.row);
   char *line_content = next_line(it, &len);
   if (!line_content)
     return;
-  if (editor->cursor_preffered == UINT32_MAX)
+  if (this->cursor_preffered == UINT32_MAX)
-    editor->cursor_preffered =
+    this->cursor_preffered =
-        get_visual_col_from_bytes(line_content, len, editor->cursor.col);
+        get_visual_col_from_bytes(line_content, len, this->cursor.col);
-  uint32_t visual_col = editor->cursor_preffered;
+  uint32_t visual_col = this->cursor_preffered;
   free(it->buffer);
   free(it);
-  uint32_t target_row = editor->cursor.row;
+  uint32_t target_row = this->cursor.row;
   while (number > 0 && target_row > 0) {
     target_row--;
     if (target_row == 0) {
@@ -161,32 +162,31 @@ void cursor_up(Editor *editor, uint32_t number) {
     }
     number--;
   }
-  it = begin_l_iter(editor->root, target_row);
+  it = begin_l_iter(this->root, target_row);
   line_content = next_line(it, &len);
   if (line_content) {
     if (len > 0 && line_content[len - 1] == '\n')
       --len;
-    editor->cursor.row = target_row;
+    this->cursor.row = target_row;
-    editor->cursor.col =
+    this->cursor.col = get_bytes_from_visual_col(line_content, len, visual_col);
-        get_bytes_from_visual_col(line_content, len, visual_col);
   } else {
-    editor->cursor.row = 0;
+    this->cursor.row = 0;
-    editor->cursor.col = 0;
+    this->cursor.col = 0;
   }
   free(it->buffer);
   free(it);
 }
 
-void cursor_right(Editor *editor, uint32_t number) {
+void Editor::cursor_right(uint32_t number) {
-  if (!editor || !editor->root || number == 0)
+  if (!this->root || number == 0)
     return;
-  editor->cursor = move_right(editor, editor->cursor, number);
+  this->cursor = this->move_right(this->cursor, number);
-  editor->cursor_preffered = UINT32_MAX;
+  this->cursor_preffered = UINT32_MAX;
 }
 
-void cursor_left(Editor *editor, uint32_t number) {
+void Editor::cursor_left(uint32_t number) {
-  if (!editor || !editor->root || number == 0)
+  if (!this->root || number == 0)
     return;
-  editor->cursor = move_left(editor, editor->cursor, number);
+  this->cursor = this->move_left(this->cursor, number);
-  editor->cursor_preffered = UINT32_MAX;
+  this->cursor_preffered = UINT32_MAX;
 }

src/editor/edit.cc

@@ -2,20 +2,18 @@
 #include "lsp/lsp.h"
 #include "utils/utils.h"
 
-void edit_erase(Editor *editor, Coord pos, int64_t len) {
+void Editor::edit_erase(Coord pos, int64_t len) {
   if (len == 0)
     return;
   if (len < 0) {
-    std::shared_lock lock_1(editor->knot_mtx);
     uint32_t cursor_original =
-        line_to_byte(editor->root, editor->cursor.row, nullptr) +
+        line_to_byte(this->root, this->cursor.row, nullptr) + this->cursor.col;
-        editor->cursor.col;
+    uint32_t byte_pos = line_to_byte(this->root, pos.row, nullptr) + pos.col;
-    uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
+    Coord point = this->move_left(pos, -len);
-    Coord point = move_left(editor, pos, -len);
     json lsp_range;
-    bool do_lsp = (editor->lsp != nullptr);
+    bool do_lsp = (this->lsp != nullptr);
     if (do_lsp) {
-      LineIterator *it = begin_l_iter(editor->root, point.row);
+      LineIterator *it = begin_l_iter(this->root, point.row);
       uint32_t len;
       char *line = next_line(it, &len);
       int utf16_start = 0;
@@ -23,7 +21,7 @@ void edit_erase(Editor *editor, Coord pos, int64_t len) {
         utf16_start = utf8_offset_to_utf16(line, len, point.col);
       free(it->buffer);
       free(it);
-      it = begin_l_iter(editor->root, pos.row);
+      it = begin_l_iter(this->root, pos.row);
       line = next_line(it, &len);
       int utf16_end = 0;
       if (line)
@@ -33,62 +31,58 @@ void edit_erase(Editor *editor, Coord pos, int64_t len) {
       lsp_range = {{"start", {{"line", point.row}, {"character", utf16_start}}},
                    {"end", {{"line", pos.row}, {"character", utf16_end}}}};
     }
-    uint32_t start = line_to_byte(editor->root, point.row, nullptr) + point.col;
+    uint32_t start = line_to_byte(this->root, point.row, nullptr) + point.col;
     if (cursor_original > start && cursor_original <= byte_pos) {
-      editor->cursor = point;
+      this->cursor = point;
-      editor->cursor_preffered = UINT32_MAX;
+      this->cursor_preffered = UINT32_MAX;
     } else if (cursor_original > byte_pos) {
       uint32_t cursor_new = cursor_original - (byte_pos - start);
       uint32_t new_col;
-      uint32_t new_row = byte_to_line(editor->root, cursor_new, &new_col);
+      uint32_t new_row = byte_to_line(this->root, cursor_new, &new_col);
-      editor->cursor = {new_row, new_col};
+      this->cursor = {new_row, new_col};
-      editor->cursor_preffered = UINT32_MAX;
+      this->cursor_preffered = UINT32_MAX;
     }
-    lock_1.unlock();
     uint32_t start_row = point.row;
     uint32_t end_row = pos.row;
-    apply_hook_deletion(editor, start_row + 1, end_row);
+    this->root = erase(this->root, start, byte_pos - start);
-    std::unique_lock lock_2(editor->knot_mtx);
+    if (this->parser)
-    editor->root = erase(editor->root, start, byte_pos - start);
+      this->parser->edit(start_row, end_row - start_row, 0);
-    lock_2.unlock();
+    this->hooks.edit(start_row, end_row - start_row, 0);
-    if (editor->parser)
-      editor->parser->edit(start_row, end_row - start_row, 0);
     if (do_lsp) {
-      if (editor->lsp->incremental_sync) {
+      auto lsp = this->lsp.load();
-        json message = {
+      if (lsp->incremental_sync) {
-            {"jsonrpc", "2.0"},
+        auto message = std::make_unique<LSPMessage>();
+        message->message = {
             {"method", "textDocument/didChange"},
             {"params",
              {{"textDocument",
-               {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+               {{"uri", this->uri}, {"version", ++this->lsp_version}}},
               {"contentChanges",
                json::array({{{"range", lsp_range}, {"text", ""}}})}}}};
-        lsp_send(editor->lsp, message, nullptr);
+        lsp->send(std::move(message));
       } else {
-        char *buf = read(editor->root, 0, editor->root->char_count);
+        char *buf = read(this->root, 0, this->root->char_count);
         std::string text(buf);
         free(buf);
-        json message = {
+        auto message = std::make_unique<LSPMessage>();
-            {"jsonrpc", "2.0"},
+        message->message = {
             {"method", "textDocument/didChange"},
             {"params",
              {{"textDocument",
-               {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+               {{"uri", this->uri}, {"version", ++this->lsp_version}}},
               {"contentChanges", json::array({{{"text", text}}})}}}};
-        lsp_send(editor->lsp, message, nullptr);
+        lsp->send(std::move(message));
       }
     }
   } else {
-    std::shared_lock lock_1(editor->knot_mtx);
     uint32_t cursor_original =
-        line_to_byte(editor->root, editor->cursor.row, nullptr) +
+        line_to_byte(this->root, this->cursor.row, nullptr) + this->cursor.col;
-        editor->cursor.col;
+    uint32_t byte_pos = line_to_byte(this->root, pos.row, nullptr) + pos.col;
-    uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
+    Coord point = this->move_right(pos, len);
-    Coord point = move_right(editor, pos, len);
     json lsp_range;
-    bool do_lsp = (editor->lsp != nullptr);
+    bool do_lsp = (this->lsp != nullptr);
     if (do_lsp) {
-      LineIterator *it = begin_l_iter(editor->root, pos.row);
+      LineIterator *it = begin_l_iter(this->root, pos.row);
       uint32_t line_len;
       char *line = next_line(it, &line_len);
       int utf16_start = 0;
@@ -96,7 +90,7 @@ void edit_erase(Editor *editor, Coord pos, int64_t len) {
         utf16_start = utf8_offset_to_utf16(line, line_len, pos.col);
       free(it->buffer);
       free(it);
-      it = begin_l_iter(editor->root, point.row);
+      it = begin_l_iter(this->root, point.row);
       line = next_line(it, &line_len);
       int utf16_end = 0;
       if (line)
@@ -106,67 +100,63 @@ void edit_erase(Editor *editor, Coord pos, int64_t len) {
       lsp_range = {{"start", {{"line", pos.row}, {"character", utf16_start}}},
                    {"end", {{"line", point.row}, {"character", utf16_end}}}};
     }
-    uint32_t end = line_to_byte(editor->root, point.row, nullptr) + point.col;
+    uint32_t end = line_to_byte(this->root, point.row, nullptr) + point.col;
     if (cursor_original > byte_pos && cursor_original <= end) {
-      editor->cursor = pos;
+      this->cursor = pos;
-      editor->cursor_preffered = UINT32_MAX;
+      this->cursor_preffered = UINT32_MAX;
     } else if (cursor_original > end) {
       uint32_t cursor_new = cursor_original - (end - byte_pos);
       uint32_t new_col;
-      uint32_t new_row = byte_to_line(editor->root, cursor_new, &new_col);
+      uint32_t new_row = byte_to_line(this->root, cursor_new, &new_col);
-      editor->cursor = {new_row, new_col};
+      this->cursor = {new_row, new_col};
-      editor->cursor_preffered = UINT32_MAX;
+      this->cursor_preffered = UINT32_MAX;
     }
-    lock_1.unlock();
     uint32_t start_row = pos.row;
     uint32_t end_row = point.row;
-    apply_hook_deletion(editor, start_row + 1, end_row);
+    this->root = erase(this->root, byte_pos, end - byte_pos);
-    std::unique_lock lock_2(editor->knot_mtx);
+    if (this->parser)
-    editor->root = erase(editor->root, byte_pos, end - byte_pos);
+      this->parser->edit(start_row, end_row - start_row, 0);
-    lock_2.unlock();
+    this->hooks.edit(start_row, end_row - start_row, 0);
-    if (editor->parser)
-      editor->parser->edit(start_row, end_row - start_row, 0);
     if (do_lsp) {
-      if (editor->lsp->incremental_sync) {
+      auto lsp = this->lsp.load();
-        json message = {
+      if (lsp->incremental_sync) {
-            {"jsonrpc", "2.0"},
+        auto message = std::make_unique<LSPMessage>();
+        message->message = {
             {"method", "textDocument/didChange"},
             {"params",
              {{"textDocument",
-               {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+               {{"uri", this->uri}, {"version", ++this->lsp_version}}},
               {"contentChanges",
                json::array({{{"range", lsp_range}, {"text", ""}}})}}}};
-        lsp_send(editor->lsp, message, nullptr);
+        lsp->send(std::move(message));
       } else {
-        char *buf = read(editor->root, 0, editor->root->char_count);
+        char *buf = read(this->root, 0, this->root->char_count);
         std::string text(buf);
         free(buf);
-        json message = {
+        auto message = std::make_unique<LSPMessage>();
-            {"jsonrpc", "2.0"},
+        message->message = {
             {"method", "textDocument/didChange"},
             {"params",
              {{"textDocument",
-               {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+               {{"uri", this->uri}, {"version", ++this->lsp_version}}},
               {"contentChanges", json::array({{{"text", text}}})}}}};
-        lsp_send(editor->lsp, message, nullptr);
+        lsp->send(std::move(message));
       }
     }
   }
 }
 
-void edit_insert(Editor *editor, Coord pos, char *data, uint32_t len) {
+void Editor::edit_insert(Coord pos, char *data, uint32_t len) {
-  std::shared_lock lock_1(editor->knot_mtx);
   uint32_t cursor_original =
-      line_to_byte(editor->root, editor->cursor.row, nullptr) +
+      line_to_byte(this->root, this->cursor.row, nullptr) + this->cursor.col;
-      editor->cursor.col;
+  uint32_t byte_pos = line_to_byte(this->root, pos.row, nullptr) + pos.col;
-  uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
   if (cursor_original > byte_pos) {
     uint32_t cursor_new = cursor_original + len;
     uint32_t new_col;
-    uint32_t new_row = byte_to_line(editor->root, cursor_new, &new_col);
+    uint32_t new_row = byte_to_line(this->root, cursor_new, &new_col);
-    editor->cursor = {new_row, new_col};
+    this->cursor = {new_row, new_col};
   }
-  LineIterator *it = begin_l_iter(editor->root, pos.row);
+  LineIterator *it = begin_l_iter(this->root, pos.row);
   uint32_t line_len;
   char *line = next_line(it, &line_len);
   int utf16_col = 0;
@@ -174,55 +164,52 @@ void edit_insert(Editor *editor, Coord pos, char *data, uint32_t len) {
     utf16_col = utf8_offset_to_utf16(line, line_len, pos.col);
   free(it->buffer);
   free(it);
-  lock_1.unlock();
+  this->root = insert(this->root, byte_pos, data, len);
-  std::unique_lock lock_2(editor->knot_mtx);
-  editor->root = insert(editor->root, byte_pos, data, len);
   uint32_t rows = 0;
   for (uint32_t i = 0; i < len; i++)
     if (data[i] == '\n')
       rows++;
-  apply_hook_insertion(editor, pos.row, rows);
+  if (this->parser)
-  lock_2.unlock();
+    this->parser->edit(pos.row, 0, rows);
-  if (editor->parser)
+  this->hooks.edit(pos.row, 0, rows);
-    editor->parser->edit(pos.row, 0, rows);
+  auto lsp = this->lsp.load();
-  if (editor->lsp) {
+  if (lsp) {
-    if (editor->lsp->incremental_sync) {
+    if (lsp->incremental_sync) {
-      json message = {
+      auto message = std::make_unique<LSPMessage>();
-          {"jsonrpc", "2.0"},
+      message->message = {
           {"method", "textDocument/didChange"},
           {"params",
            {{"textDocument",
-             {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+             {{"uri", this->uri}, {"version", ++this->lsp_version}}},
             {"contentChanges",
              json::array(
                  {{{"range",
                     {{"start", {{"line", pos.row}, {"character", utf16_col}}},
                      {"end", {{"line", pos.row}, {"character", utf16_col}}}}},
                    {"text", std::string(data, len)}}})}}}};
-      lsp_send(editor->lsp, message, nullptr);
+      lsp->send(std::move(message));
     } else {
-      char *buf = read(editor->root, 0, editor->root->char_count);
+      char *buf = read(this->root, 0, this->root->char_count);
       std::string text(buf);
       free(buf);
-      json message = {
+      auto message = std::make_unique<LSPMessage>();
-          {"jsonrpc", "2.0"},
+      message->message = {
           {"method", "textDocument/didChange"},
           {"params",
            {{"textDocument",
-             {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+             {{"uri", this->uri}, {"version", ++this->lsp_version}}},
             {"contentChanges", json::array({{{"text", text}}})}}}};
-      lsp_send(editor->lsp, message, nullptr);
+      lsp->send(std::move(message));
     }
   }
 }
 
-void edit_replace(Editor *editor, Coord start, Coord end, const char *text,
+void Editor::edit_replace(Coord start, Coord end, const char *text,
-                  uint32_t len) {
+                          uint32_t len) {
-  std::unique_lock lock(editor->knot_mtx);
   uint32_t start_byte =
-      line_to_byte(editor->root, start.row, nullptr) + start.col;
+      line_to_byte(this->root, start.row, nullptr) + start.col;
-  uint32_t end_byte = line_to_byte(editor->root, end.row, nullptr) + end.col;
+  uint32_t end_byte = line_to_byte(this->root, end.row, nullptr) + end.col;
-  LineIterator *it = begin_l_iter(editor->root, start.row);
+  LineIterator *it = begin_l_iter(this->root, start.row);
   uint32_t line_len;
   char *line = next_line(it, &line_len);
   int utf16_start = 0;
@@ -230,7 +217,7 @@ void edit_replace(Editor *editor, Coord start, Coord end, const char *text,
     utf16_start = utf8_offset_to_utf16(line, line_len, start.col);
   free(it->buffer);
   free(it);
-  it = begin_l_iter(editor->root, end.row);
+  it = begin_l_iter(this->root, end.row);
   line = next_line(it, &line_len);
   int utf16_end = 0;
   if (line)
@@ -238,25 +225,25 @@ void edit_replace(Editor *editor, Coord start, Coord end, const char *text,
   free(it->buffer);
   free(it);
   if (start_byte != end_byte)
-    editor->root = erase(editor->root, start_byte, end_byte - start_byte);
+    this->root = erase(this->root, start_byte, end_byte - start_byte);
   if (len > 0)
-    editor->root = insert(editor->root, start_byte, (char *)text, len);
+    this->root = insert(this->root, start_byte, (char *)text, len);
   uint32_t rows = 0;
   for (uint32_t i = 0; i < len; i++)
     if (text[i] == '\n')
       rows++;
-  if (rows > 0)
+  if (this->parser)
-    rows--;
+    this->parser->edit(start.row, end.row - start.row, rows);
-  if (editor->parser)
+  this->hooks.edit(start.row, end.row - start.row, rows);
-    editor->parser->edit(start.row, end.row - start.row, rows);
+  auto lsp = this->lsp.load();
-  if (editor->lsp) {
+  if (lsp) {
-    if (editor->lsp->incremental_sync) {
+    if (lsp->incremental_sync) {
-      json message = {
+      auto message = std::make_unique<LSPMessage>();
-          {"jsonrpc", "2.0"},
+      message->message = {
           {"method", "textDocument/didChange"},
           {"params",
            {{"textDocument",
-             {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+             {{"uri", this->uri}, {"version", ++this->lsp_version}}},
             {"contentChanges",
              json::array(
                  {{{"range",
@@ -264,19 +251,19 @@ void edit_replace(Editor *editor, Coord start, Coord end, const char *text,
                       {{"line", start.row}, {"character", utf16_start}}},
                      {"end", {{"line", end.row}, {"character", utf16_end}}}}},
                    {"text", std::string(text, len)}}})}}}};
-      lsp_send(editor->lsp, message, nullptr);
+      lsp->send(std::move(message));
     } else {
-      char *buf = read(editor->root, 0, editor->root->char_count);
+      char *buf = read(this->root, 0, this->root->char_count);
       std::string full_text(buf);
       free(buf);
-      json message = {
+      auto message = std::make_unique<LSPMessage>();
-          {"jsonrpc", "2.0"},
+      message->message = {
           {"method", "textDocument/didChange"},
           {"params",
            {{"textDocument",
-             {{"uri", editor->uri}, {"version", ++editor->lsp_version}}},
+             {{"uri", this->uri}, {"version", ++this->lsp_version}}},
             {"contentChanges", json::array({{{"text", full_text}}})}}}};
-      lsp_send(editor->lsp, message, nullptr);
+      lsp->send(std::move(message));
     }
   }
 }

src/editor/editor.cc

@@ -1,73 +1,68 @@
 #include "editor/editor.h"
-#include "editor/decl.h"
 #include "lsp/lsp.h"
 #include "main.h"
 #include "syntax/langs.h"
 #include "utils/utils.h"
 
-Editor *new_editor(const char *filename_arg, Coord position, Coord size,
+Editor::Editor(const char *filename_arg, uint8_t eol) {
-                   uint8_t eol) {
-  Editor *editor = new Editor();
-  if (!editor)
-    return nullptr;
   uint32_t len = 0;
   std::string filename = path_abs(filename_arg);
-  editor->unix_eol = eol & 1;
+  this->unix_eol = eol & 1;
-  char *str = load_file(filename.c_str(), &len, &editor->unix_eol);
+  char *str = load_file(filename.c_str(), &len, &this->unix_eol);
   if (!str) {
     str = (char *)malloc(1);
     *str = '\n';
     len = 1;
   }
   if ((eol >> 1) & 1)
-    editor->unix_eol = eol & 1;
+    this->unix_eol = eol & 1;
-  editor->filename = filename;
+  this->filename = filename;
-  editor->uri = path_to_file_uri(filename);
+  this->uri = path_to_file_uri(filename);
-  editor->position = position;
+  this->cursor_preffered = UINT32_MAX;
-  editor->size = size;
-  editor->cursor_preffered = UINT32_MAX;
   if (len == 0) {
     free(str);
     str = (char *)malloc(1);
     *str = '\n';
     len = 1;
   }
-  editor->root = load(str, len, optimal_chunk_size(len));
+  this->scroll = {0, 0};
+  this->cursor = {0, 0};
+  this->size = {20, 20};
+  this->root = load(str, len, optimal_chunk_size(len));
   free(str);
-  editor->lang = language_for_file(filename.c_str());
+  this->lang = language_for_file(filename.c_str());
-  if (parsers.find(editor->lang.name) != parsers.end())
+  if (parsers.find(this->lang.name) != parsers.end())
-    editor->parser = new Parser(editor, editor->lang.name, size.row + 5);
+    this->parser = new Parser(this, this->lang.name, size.row + 5);
-  if (editor->lang.name == "css" || editor->lang.name == "html" ||
+  if (this->lang.name == "css" || this->lang.name == "html" ||
-      editor->lang.name == "javascript" || editor->lang.name == "markdown" ||
+      this->lang.name == "javascript" || this->lang.name == "markdown" ||
-      editor->lang.name == "typescript")
+      this->lang.name == "typescript")
-    editor->is_css_color = true;
+    this->is_css_color = true;
-  if (len <= (1024 * 28))
+  if (len <= (1024 * 28)) {
-    request_add_to_lsp(editor->lang, editor);
+    std::lock_guard lock(lsp::lsp_mutex);
-  editor->indents.compute_indent(editor);
+    lsp::new_editors.push_back(this);
-  return editor;
+  }
+  this->indents.compute_indent(this);
 }
 
-void free_editor(Editor *editor) {
+Editor::~Editor() {
-  remove_from_lsp(editor);
+  auto lsp = this->lsp.load();
-  if (editor->parser)
+  if (lsp)
-    delete editor->parser;
+    lsp->remove(this);
-  editor->parser = nullptr;
+  if (this->parser)
-  free_rope(editor->root);
+    delete this->parser;
-  delete editor;
+  this->parser = nullptr;
+  free_rope(this->root);
 }
 
-void save_file(Editor *editor) {
+void Editor::save() {
-  if (!editor || !editor->root)
+  if (!this->root)
     return;
-  std::shared_lock lock(editor->knot_mtx);
+  uint32_t char_count = this->root->char_count;
-  int version = editor->lsp_version;
+  char *str = read(this->root, 0, char_count);
-  uint32_t char_count = editor->root->char_count;
-  char *str = read(editor->root, 0, char_count);
   if (!str)
     return;
-  lock.unlock();
+  std::ofstream out(this->filename);
-  std::ofstream out(editor->filename);
+  if (!this->unix_eol) {
-  if (!editor->unix_eol) {
     for (uint32_t i = 0; i < char_count; ++i) {
       if (str[i] == '\n')
         out.put('\r');
@@ -78,67 +73,6 @@ void save_file(Editor *editor) {
   }
   out.close();
   free(str);
-  bar.log("Written " + std::to_string(char_count) + " bytes to " +
+  ui::bar.log("Written " + std::to_string(char_count) + " bytes to " +
-          editor->filename);
+              this->filename);
-  if (editor->lsp) {
-    json save_msg = {{"jsonrpc", "2.0"},
-                     {"method", "textDocument/didSave"},
-                     {"params", {{"textDocument", {{"uri", editor->uri}}}}}};
-    lsp_send(editor->lsp, save_msg, nullptr);
-    if (editor->lsp->allow_formatting) {
-      json msg = {{"jsonrpc", "2.0"},
-                  {"method", "textDocument/formatting"},
-                  {"params",
-                   {{"textDocument", {{"uri", editor->uri}}},
-                    {"options",
-                     {{"tabSize", 2},
-                      {"insertSpaces", true},
-                      {"trimTrailingWhitespace", true},
-                      {"trimFinalNewlines", true}}}}}};
-      LSPPending *pending = new LSPPending();
-      pending->editor = editor;
-      pending->callback = [save_msg, version](Editor *editor,
-                                              const json &message) {
-        if (version != editor->lsp_version)
-          return;
-        auto &edits = message["result"];
-        if (edits.is_array()) {
-          std::vector<TextEdit> t_edits;
-          t_edits.reserve(edits.size());
-          for (auto &edit : edits) {
-            TextEdit t_edit;
-            t_edit.text = edit.value("newText", "");
-            t_edit.start.row = edit["range"]["start"]["line"];
-            t_edit.start.col = edit["range"]["start"]["character"];
-            t_edit.end.row = edit["range"]["end"]["line"];
-            t_edit.end.col = edit["range"]["end"]["character"];
-            utf8_normalize_edit(editor, &t_edit);
-            t_edits.push_back(t_edit);
-          }
-          apply_lsp_edits(editor, t_edits, false);
-          ensure_scroll(editor);
-          std::shared_lock lock(editor->knot_mtx);
-          uint32_t char_count = editor->root->char_count;
-          char *str = read(editor->root, 0, char_count);
-          if (!str)
-            return;
-          lock.unlock();
-          std::ofstream out(editor->filename);
-          if (!editor->unix_eol) {
-            for (uint32_t i = 0; i < char_count; ++i) {
-              if (str[i] == '\n')
-                out.put('\r');
-              out.put(str[i]);
-            }
-          } else {
-            out.write(str, char_count);
-          }
-          out.close();
-          free(str);
-          lsp_send(editor->lsp, save_msg, nullptr);
-        }
-      };
-      lsp_send(editor->lsp, msg, pending);
-    }
-  }
 }

src/editor/events.cc

@@ -1,60 +1,59 @@
 #include "editor/editor.h"
-#include "editor/helpers.h"
+#include "extentions/hover.h"
 #include "io/sysio.h"
 #include "main.h"
 #include "utils/utils.h"
 
-void handle_editor_event(Editor *editor, KeyEvent event) {
+void Editor::handle_event(KeyEvent event) {
   uint8_t old_mode = mode;
-  if (editor->hover_active)
+  if (!this->hover_popup->hidden)
-    editor->hover_active = false;
+    this->hover_popup->hidden = true;
-  handle_mouse(editor, event);
   if (event.key_type == KEY_SPECIAL) {
     switch (event.special_modifier) {
     case 0:
       switch (event.special_key) {
       case KEY_DOWN:
-        cursor_down(editor, 1);
+        this->cursor_down(1);
         break;
       case KEY_UP:
-        cursor_up(editor, 1);
+        this->cursor_up(1);
         break;
       case KEY_LEFT:
-        cursor_left(editor, 1);
+        this->cursor_left(1);
         break;
       case KEY_RIGHT:
-        cursor_right(editor, 1);
+        this->cursor_right(1);
         break;
       }
       break;
     case CNTRL:
       switch (event.special_key) {
       case KEY_DOWN:
-        cursor_down(editor, 5);
+        this->cursor_down(5);
         break;
       case KEY_UP:
-        cursor_up(editor, 5);
+        this->cursor_up(5);
         break;
       case KEY_LEFT:
-        cursor_prev_word(editor);
+        this->cursor_prev_word();
       case KEY_RIGHT:
-        cursor_next_word(editor);
+        this->cursor_next_word();
         break;
       }
       break;
     case ALT:
       switch (event.special_key) {
       case KEY_DOWN:
-        move_line_down(editor);
+        this->move_line_down();
         break;
       case KEY_UP:
-        move_line_up(editor);
+        this->move_line_up();
         break;
       case KEY_LEFT:
-        cursor_left(editor, 8);
+        this->cursor_left(8);
         break;
       case KEY_RIGHT:
-        cursor_right(editor, 8);
+        this->cursor_right(8);
         break;
       }
       break;
@@ -65,86 +64,86 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
     if (event.key_type == KEY_CHAR && event.len == 1) {
       switch (event.c[0]) {
       case 'u':
-        select_all(editor);
+        this->select_all();
         break;
       case CTRL('h'):
-        editor->hover.scroll(-1);
+        this->hover_popup->scroll(-1);
-        editor->hover_active = true;
+        this->hover_popup->hidden = false;
         break;
       case CTRL('l'):
-        editor->hover.scroll(1);
+        this->hover_popup->scroll(1);
-        editor->hover_active = true;
+        this->hover_popup->hidden = false;
         break;
       case 'h':
-        fetch_lsp_hover(editor);
+        this->fetch_lsp_hover();
         break;
       case 'a': {
         mode = INSERT;
-        Coord start = editor->cursor;
+        Coord start = this->cursor;
-        cursor_right(editor, 1);
+        this->cursor_right(1);
-        if (start.row != editor->cursor.row)
+        if (start.row != this->cursor.row)
-          cursor_left(editor, 1);
+          this->cursor_left(1);
       } break;
       case 'i':
         mode = INSERT;
         break;
       case 'n':
         mode = JUMPER;
-        editor->jumper_set = true;
+        this->jumper_set = true;
         break;
       case 'm':
         mode = JUMPER;
-        editor->jumper_set = false;
+        this->jumper_set = false;
         break;
       case 'N':
-        clear_hooks_at_line(editor, editor->cursor.row);
+        this->hooks.clear_line(this->cursor.row);
         break;
       case 's':
       case 'v':
         mode = SELECT;
-        editor->selection_active = true;
+        this->selection_active = true;
-        editor->selection = editor->cursor;
+        this->selection = this->cursor;
-        editor->selection_type = CHAR;
+        this->selection_type = CHAR;
         break;
       case ';':
       case ':':
         mode = RUNNER;
         break;
       case 0x7F:
-        cursor_left(editor, 1);
+        this->cursor_left(1);
         break;
       case ' ':
-        cursor_right(editor, 1);
+        this->cursor_right(1);
         break;
       case '\r':
       case '\n':
-        cursor_down(editor, 1);
+        this->cursor_down(1);
         break;
       case '\\':
       case '|':
-        cursor_up(editor, 1);
+        this->cursor_up(1);
         break;
       case CTRL('d'):
-        scroll_down(editor, 1);
+        this->scroll_down(1);
-        ensure_cursor(editor);
+        this->ensure_cursor();
         break;
       case CTRL('u'):
-        scroll_up(editor, 1);
+        this->scroll_up(1);
-        ensure_cursor(editor);
+        this->ensure_cursor();
         break;
       case '>':
       case '.':
-        indent_current_line(editor);
+        this->indent_current_line();
         break;
       case '<':
       case ',':
-        dedent_current_line(editor);
+        this->dedent_current_line();
         break;
       case CTRL('s'):
-        save_file(editor);
+        this->save();
         break;
       case 'p':
-        paste(editor);
+        this->paste();
         break;
       }
     }
@@ -153,34 +152,34 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
     if (event.key_type == KEY_CHAR) {
       if (event.len == 1) {
         if (event.c[0] == '\t') {
-          editor->indents.insert_tab(editor->cursor);
+          this->indents.insert_tab(this->cursor);
         } else if (event.c[0] == '\n' || event.c[0] == '\r') {
-          editor->indents.insert_new_line(editor->cursor);
+          this->indents.insert_new_line(this->cursor);
         } else if (event.c[0] == CTRL('W')) {
-          delete_prev_word(editor);
+          this->delete_prev_word();
         } else if (isprint((unsigned char)(event.c[0]))) {
-          insert_char(editor, event.c[0]);
+          this->insert_char(event.c[0]);
         } else if (event.c[0] == 0x7F || event.c[0] == 0x08) {
-          backspace_edit(editor);
+          this->backspace_edit();
         } else if (event.c[0] == 0x1B) {
-          normal_mode(editor);
+          this->normal_mode();
         }
       } else if (event.len > 1) {
-        edit_insert(editor, editor->cursor, event.c, event.len);
+        this->edit_insert(this->cursor, event.c, event.len);
-        cursor_right(editor, 1);
+        this->cursor_right(1);
       }
     } else if (event.key_type == KEY_SPECIAL &&
                event.special_key == KEY_DELETE) {
       switch (event.special_modifier) {
       case 0:
-        edit_erase(editor, editor->cursor, 1);
+        this->edit_erase(this->cursor, 1);
         break;
       case CNTRL:
-        delete_next_word(editor);
+        this->delete_next_word();
         break;
       }
     } else if (event.key_type == KEY_PASTE) {
-      insert_str(editor, event.c, event.len);
+      this->insert_str(event.c, event.len);
     }
     break;
   case SELECT:
@@ -189,28 +188,28 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
       case 0x1B:
       case 's':
       case 'v':
-        editor->selection_active = false;
+        this->selection_active = false;
         mode = NORMAL;
         break;
       case 'y':
-        copy(editor);
+        this->copy();
         mode = NORMAL;
         break;
       case 'x':
-        cut(editor);
+        this->cut();
         mode = NORMAL;
         break;
       case 'p':
-        paste(editor);
+        this->paste();
         mode = NORMAL;
         break;
       case '<':
       case ',':
-        dedent_selection(editor);
+        this->dedent_selection();
         break;
       case '>':
       case '.':
-        indent_selection(editor);
+        this->indent_selection();
         break;
       }
     }
@@ -218,25 +217,18 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
   case JUMPER:
     if (event.key_type == KEY_CHAR && event.len == 1 &&
         (event.c[0] >= '!' && event.c[0] <= '~')) {
-      if (editor->jumper_set) {
+      if (this->jumper_set) {
-        for (uint8_t i = 0; i < 94; i++)
+        this->hooks.set(event.c[0], this->cursor.row);
-          if (editor->hooks[i] == editor->cursor.row + 1) {
-            editor->hooks[i] = 0;
-            break;
-          }
-        editor->hooks[event.c[0] - '!'] = editor->cursor.row + 1;
       } else {
-        uint32_t line = editor->hooks[event.c[0] - '!'] - 1;
+        uint32_t line;
-        if (line > 0) {
+        if (this->hooks.get(event.c[0], &line))
-          editor->cursor = {line, 0};
+          this->cursor = {line, 0};
-          editor->cursor_preffered = UINT32_MAX;
-        }
       }
     }
     mode = NORMAL;
     break;
   }
-  if (old_mode == mode || mode != INSERT)
+  // if (old_mode == mode || mode != INSERT)
-    handle_completion(editor, event);
+  //   this->completion.handle(event);
-  ensure_scroll(editor);
+  this->ensure_scroll();
 }

src/editor/helpers.cc

@@ -1,86 +1,83 @@
 #include "editor/helpers.h"
 #include "editor/editor.h"
+#include "extentions/hover.h"
 #include "io/sysio.h"
 #include "lsp/lsp.h"
 #include "main.h"
 #include "utils/utils.h"
-#include <sys/types.h>
 
-void cut(Editor *editor) {
+void Editor::cut() {
-  if (ABS((int64_t)editor->cursor.row - (int64_t)editor->selection.row) >
+  if (ABS((int64_t)this->cursor.row - (int64_t)this->selection.row) > 1500) {
-      1500) {
+    ui::bar.log("Selection too large!");
-    bar.log("Selection too large!");
     return;
   }
   if (mode != SELECT)
     return;
   Coord start;
   uint32_t len;
-  char *text = get_selection(editor, &len, &start);
+  char *text = this->get_selection(&len, &start);
   ruby_copy(text, len);
   len = count_clusters(text, len, 0, len);
-  edit_erase(editor, start, len);
+  this->edit_erase(start, len);
   free(text);
-  editor->selection_active = false;
+  this->selection_active = false;
 }
 
-void copy(Editor *editor) {
+void Editor::copy() {
-  if (ABS((int64_t)editor->cursor.row - (int64_t)editor->selection.row) >
+  if (ABS((int64_t)this->cursor.row - (int64_t)this->selection.row) > 1500) {
-      1500) {
+    ui::bar.log("Selection too large!");
-    bar.log("Selection too large!");
     return;
   }
   if (mode != SELECT)
     return;
   uint32_t len;
-  char *text = get_selection(editor, &len, nullptr);
+  char *text = this->get_selection(&len, nullptr);
   ruby_copy(text, len);
   free(text);
-  editor->selection_active = false;
+  this->selection_active = false;
 }
 
-void paste(Editor *editor) {
+void Editor::paste() {
   if (mode == NORMAL) {
     std::string text = ruby_paste();
     if (text.empty())
       return;
-    insert_str(editor, (char *)text.c_str(), text.length());
+    this->insert_str((char *)text.c_str(), text.length());
   } else if (mode == SELECT) {
     std::string text = ruby_paste();
     if (!text.empty()) {
       Coord start, end;
-      selection_bounds(editor, &start, &end);
+      this->selection_bounds(&start, &end);
       uint32_t start_byte =
-          line_to_byte(editor->root, start.row, nullptr) + start.col;
+          line_to_byte(this->root, start.row, nullptr) + start.col;
-      uint32_t end_byte =
+      uint32_t end_byte = line_to_byte(this->root, end.row, nullptr) + end.col;
-          line_to_byte(editor->root, end.row, nullptr) + end.col;
+      this->edit_erase(start, end_byte - start_byte);
-      edit_erase(editor, start, end_byte - start_byte);
+      this->edit_insert(this->cursor, (char *)text.c_str(), text.length());
-      edit_insert(editor, editor->cursor, (char *)text.c_str(), text.length());
     }
-    editor->selection_active = false;
+    this->selection_active = false;
   }
 }
 
-void insert_str(Editor *editor, char *c, uint32_t len) {
+void Editor::insert_str(char *c, uint32_t len) {
   if (c) {
-    edit_insert(editor, editor->cursor, c, len);
+    this->edit_insert(this->cursor, c, len);
     uint32_t grapheme_len = count_clusters(c, len, 0, len);
-    cursor_right(editor, grapheme_len);
+    this->cursor_right(grapheme_len);
   }
 }
 
-void indent_current_line(Editor *editor) {
+void Editor::indent_current_line() {
-  Coord start = editor->cursor;
+  Coord start = this->cursor;
-  uint32_t delta = editor->indents.indent_line(editor->cursor.row);
+  uint32_t delta = this->indents.indent_line(this->cursor.row);
-  editor->cursor.col = start.col + delta;
+  this->cursor.col = start.col + delta;
-  editor->cursor.row = start.row;
+  this->cursor.row = start.row;
 }
 
-void dedent_current_line(Editor *editor) {
+void Editor::dedent_current_line() {
-  Coord start = editor->cursor;
+  Coord start = this->cursor;
-  uint32_t delta = editor->indents.dedent_line(editor->cursor.row);
+  uint32_t delta = this->indents.dedent_line(this->cursor.row);
-  editor->cursor.col = MAX((int64_t)start.col - delta, 0);
+  this->cursor.col = MAX((int64_t)start.col - delta, 0);
-  editor->cursor.row = start.row;
+  this->cursor.row = start.row;
 }
 
 static void move_coord_by_delta(Coord &c, uint32_t row, int64_t delta) {
@@ -90,49 +87,49 @@ static void move_coord_by_delta(Coord &c, uint32_t row, int64_t delta) {
   }
 }
 
-void indent_selection(Editor *editor) {
+void Editor::indent_selection() {
-  uint32_t top = MIN(editor->cursor.row, editor->selection.row);
+  uint32_t top = MIN(this->cursor.row, this->selection.row);
-  uint32_t bot = MAX(editor->cursor.row, editor->selection.row);
+  uint32_t bot = MAX(this->cursor.row, this->selection.row);
   if (bot - top > 1500) {
-    bar.log("Can't indent more than 1500 lines at once!");
+    ui::bar.log("Can't indent more than 1500 lines at once!");
     return;
   }
   if (bot - top >= 2)
-    editor->indents.indent_block(top + 1, bot - 1);
+    this->indents.indent_block(top + 1, bot - 1);
-  uint32_t delta_top = editor->indents.indent_line(top);
+  uint32_t delta_top = this->indents.indent_line(top);
   uint32_t delta_bot =
-      (bot == top) ? delta_top : editor->indents.indent_line(bot);
+      (bot == top) ? delta_top : this->indents.indent_line(bot);
-  move_coord_by_delta(editor->cursor, top, delta_top);
+  move_coord_by_delta(this->cursor, top, delta_top);
-  move_coord_by_delta(editor->selection, top, delta_top);
+  move_coord_by_delta(this->selection, top, delta_top);
   if (bot != top) {
-    move_coord_by_delta(editor->cursor, bot, delta_bot);
+    move_coord_by_delta(this->cursor, bot, delta_bot);
-    move_coord_by_delta(editor->selection, bot, delta_bot);
+    move_coord_by_delta(this->selection, bot, delta_bot);
   }
 }
 
-void dedent_selection(Editor *editor) {
+void Editor::dedent_selection() {
-  uint32_t top = MIN(editor->cursor.row, editor->selection.row);
+  uint32_t top = MIN(this->cursor.row, this->selection.row);
-  uint32_t bot = MAX(editor->cursor.row, editor->selection.row);
+  uint32_t bot = MAX(this->cursor.row, this->selection.row);
   if (bot - top > 1500) {
-    bar.log("Can't dedent more than 1500 lines at once!");
+    ui::bar.log("Can't dedent more than 1500 lines at once!");
     return;
   }
   if (bot - top >= 2)
-    editor->indents.dedent_block(top + 1, bot - 1);
+    this->indents.dedent_block(top + 1, bot - 1);
-  uint32_t delta_top = editor->indents.dedent_line(top);
+  uint32_t delta_top = this->indents.dedent_line(top);
   uint32_t delta_bot =
-      (bot == top) ? delta_top : editor->indents.dedent_line(bot);
+      (bot == top) ? delta_top : this->indents.dedent_line(bot);
-  move_coord_by_delta(editor->cursor, top, -(int64_t)delta_top);
+  move_coord_by_delta(this->cursor, top, -(int64_t)delta_top);
-  move_coord_by_delta(editor->selection, top, -(int64_t)delta_top);
+  move_coord_by_delta(this->selection, top, -(int64_t)delta_top);
   if (bot != top) {
-    move_coord_by_delta(editor->cursor, bot, -(int64_t)delta_bot);
+    move_coord_by_delta(this->cursor, bot, -(int64_t)delta_bot);
-    move_coord_by_delta(editor->selection, bot, -(int64_t)delta_bot);
+    move_coord_by_delta(this->selection, bot, -(int64_t)delta_bot);
   }
 }
 
-void insert_char(Editor *editor, char c) {
+void Editor::insert_char(char c) {
-  uint32_t col = editor->cursor.col;
+  uint32_t col = this->cursor.col;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  LineIterator *it = begin_l_iter(this->root, this->cursor.row);
   if (!it)
     return;
   uint32_t len;
@@ -148,7 +145,7 @@ void insert_char(Editor *editor, char c) {
     if ((c == '}' && next == '}') || (c == ')' && next == ')') ||
         (c == ']' && next == ']') || (c == '"' && next == '"') ||
         (c == '\'' && next == '\'')) {
-      cursor_right(editor, 1);
+      this->cursor_right(1);
       skip_insert = true;
     }
   }
@@ -175,16 +172,17 @@ void insert_char(Editor *editor, char c) {
     }
     if (closing) {
       char pair[2] = {c, closing};
-      edit_insert(editor, editor->cursor, pair, 2);
+      this->edit_insert(this->cursor, pair, 2);
-      cursor_right(editor, 1);
+      this->cursor_right(1);
     } else {
-      edit_insert(editor, editor->cursor, &c, 1);
+      this->edit_insert(this->cursor, &c, 1);
-      cursor_right(editor, 1);
+      this->cursor_right(1);
     }
-    if (editor->lsp && editor->lsp->allow_formatting_on_type) {
+    auto lsp = this->lsp.load();
-      for (char ch : editor->lsp->format_chars) {
+    if (lsp && lsp->allow_formatting_on_type) {
+      for (char ch : lsp->format_chars) {
         if (ch == c) {
-          LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+          LineIterator *it = begin_l_iter(this->root, this->cursor.row);
           if (!it)
             return;
           uint32_t len;
@@ -194,29 +192,27 @@ void insert_char(Editor *editor, char c) {
             free(it);
             return;
           }
-          uint32_t col = utf8_offset_to_utf16(line, len, editor->cursor.col);
+          uint32_t col = utf8_offset_to_utf16(line, len, this->cursor.col);
           free(it->buffer);
           free(it);
-          int version = editor->lsp_version;
+          int version = this->lsp_version;
-          json message = {
+          auto message = std::make_unique<LSPMessage>();
-              {"jsonrpc", "2.0"},
+          message->message = {
               {"method", "textDocument/onTypeFormatting"},
               {"params",
-               {{"textDocument", {{"uri", editor->uri}}},
+               {{"textDocument", {{"uri", this->uri}}},
-                {"position",
+                {"position", {{"line", this->cursor.row}, {"character", col}}},
-                 {{"line", editor->cursor.row}, {"character", col}}},
                 {"ch", std::string(1, c)},
                 {"options",
                  {{"tabSize", 2},
                   {"insertSpaces", true},
                   {"trimTrailingWhitespace", true},
                   {"trimFinalNewlines", true}}}}}};
-          LSPPending *pending = new LSPPending();
+          message->editor = this;
-          pending->editor = editor;
+          message->callback = [version](const LSPMessage &message) {
-          pending->callback = [version](Editor *editor, const json &message) {
+            if (version != message.editor->lsp_version)
-            if (version != editor->lsp_version)
               return;
-            auto &edits = message["result"];
+            auto &edits = message.message["result"];
             if (edits.is_array()) {
               std::vector<TextEdit> t_edits;
               t_edits.reserve(edits.size());
@@ -227,14 +223,14 @@ void insert_char(Editor *editor, char c) {
                 t_edit.start.col = edit["range"]["start"]["character"];
                 t_edit.end.row = edit["range"]["end"]["line"];
                 t_edit.end.col = edit["range"]["end"]["character"];
-                utf8_normalize_edit(editor, &t_edit);
+                message.editor->utf8_normalize_edit(&t_edit);
                 t_edits.push_back(t_edit);
               }
-              apply_lsp_edits(editor, t_edits, false);
+              message.editor->apply_lsp_edits(t_edits, false);
-              ensure_scroll(editor);
+              message.editor->ensure_scroll();
             }
           };
-          lsp_send(editor->lsp, message, pending);
+          lsp->send(std::move(message));
           break;
         }
       }
@@ -242,19 +238,86 @@ void insert_char(Editor *editor, char c) {
   }
 }
 
-void normal_mode(Editor *editor) {
+void Editor::format_full(int version) {
-  Coord prev_pos = editor->cursor;
+  auto lsp = this->lsp.load();
-  mode = NORMAL;
+  if (lsp) {
-  cursor_left(editor, 1);
+    log("Saving %s", this->filename.c_str());
-  if (prev_pos.row != editor->cursor.row)
+    auto message = std::make_unique<LSPMessage>();
-    cursor_right(editor, 1);
+    message->message = {{"method", "textDocument/didSave"},
+                        {"params", {{"textDocument", {{"uri", this->uri}}}}}};
+    lsp->send(std::move(message));
+    if (lsp->allow_formatting) {
+      json s_msg = {{"method", "textDocument/formatting"},
+                    {"params",
+                     {{"textDocument", {{"uri", this->uri}}},
+                      {"options",
+                       {{"tabSize", 2},
+                        {"insertSpaces", true},
+                        {"trimTrailingWhitespace", true},
+                        {"trimFinalNewlines", true}}}}}};
+      auto save_msg = std::make_unique<LSPMessage>();
+      save_msg->editor = this;
+      save_msg->message = s_msg;
+      save_msg->callback = [s_msg, version](const LSPMessage &msg) {
+        if (version != msg.editor->lsp_version)
+          return;
+        auto &edits = msg.message["result"];
+        if (edits.is_array()) {
+          std::vector<TextEdit> t_edits;
+          t_edits.reserve(edits.size());
+          for (auto &edit : edits) {
+            TextEdit t_edit;
+            t_edit.text = edit.value("newText", "");
+            t_edit.start.row = edit["range"]["start"]["line"];
+            t_edit.start.col = edit["range"]["start"]["character"];
+            t_edit.end.row = edit["range"]["end"]["line"];
+            t_edit.end.col = edit["range"]["end"]["character"];
+            msg.editor->utf8_normalize_edit(&t_edit);
+            t_edits.push_back(t_edit);
+          }
+          msg.editor->apply_lsp_edits(t_edits, false);
+          msg.editor->ensure_cursor();
+          uint32_t char_count = msg.editor->root->char_count;
+          char *str = read(msg.editor->root, 0, char_count);
+          if (!str)
+            return;
+          std::ofstream out(msg.editor->filename);
+          if (!msg.editor->unix_eol) {
+            for (uint32_t i = 0; i < char_count; ++i) {
+              if (str[i] == '\n')
+                out.put('\r');
+              out.put(str[i]);
+            }
+          } else {
+            out.write(str, char_count);
+          }
+          out.close();
+          free(str);
+          auto save_msg = std::make_unique<LSPMessage>();
+          save_msg->editor = msg.editor;
+          save_msg->message = s_msg;
+          save_msg->callback = [](const LSPMessage &) {};
+          msg.editor->lsp.load()->send(std::move(save_msg));
+        }
+      };
+      lsp->send(std::move(save_msg));
+    }
+  }
 }
 
-void backspace_edit(Editor *editor) {
+void Editor::normal_mode() {
-  Coord prev_pos = editor->cursor;
+  Coord prev_pos = this->cursor;
+  mode = NORMAL;
+  this->cursor_left(1);
+  if (prev_pos.row != this->cursor.row)
+    this->cursor_right(1);
+}
+
+void Editor::backspace_edit() {
+  Coord prev_pos = this->cursor;
   if (prev_pos.col > 0)
     prev_pos.col--;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  LineIterator *it = begin_l_iter(this->root, this->cursor.row);
   if (!it)
     return;
   uint32_t len;
@@ -267,11 +330,11 @@ void backspace_edit(Editor *editor) {
   if (len > 0 && line[len - 1] == '\n')
     --len;
   char prev_char = (prev_pos.col < len) ? line[prev_pos.col] : 0;
-  char next_char = (editor->cursor.col < len) ? line[editor->cursor.col] : 0;
+  char next_char = (this->cursor.col < len) ? line[this->cursor.col] : 0;
   bool before_content = false;
-  if (editor->cursor.col > 0) {
+  if (this->cursor.col > 0) {
     before_content = true;
-    for (uint32_t i = 0; i < editor->cursor.col; i++)
+    for (uint32_t i = 0; i < this->cursor.col; i++)
       if (line[i] != ' ' && line[i] != '\t') {
         before_content = false;
         break;
@@ -280,7 +343,7 @@ void backspace_edit(Editor *editor) {
   free(it->buffer);
   free(it);
   if (before_content) {
-    dedent_current_line(editor);
+    this->dedent_current_line();
     return;
   }
   bool is_pair = (prev_char == '{' && next_char == '}') ||
@@ -289,65 +352,57 @@ void backspace_edit(Editor *editor) {
                  (prev_char == '"' && next_char == '"') ||
                  (prev_char == '\'' && next_char == '\'');
   if (is_pair) {
-    edit_erase(editor, editor->cursor, 1);
+    this->edit_erase(this->cursor, 1);
-    edit_erase(editor, prev_pos, 1);
+    this->edit_erase(prev_pos, 1);
   } else {
-    edit_erase(editor, editor->cursor, -1);
+    this->edit_erase(this->cursor, -1);
   }
 }
 
-void delete_prev_word(Editor *editor) {
+void Editor::delete_prev_word() {
   uint32_t prev_col_byte, prev_col_cluster;
-  word_boundaries(editor, editor->cursor, &prev_col_byte, nullptr,
+  this->word_boundaries(this->cursor, &prev_col_byte, nullptr,
-                  &prev_col_cluster, nullptr);
+                        &prev_col_cluster, nullptr);
-  if (prev_col_byte == editor->cursor.col)
+  if (prev_col_byte == this->cursor.col)
-    edit_erase(editor, editor->cursor, -1);
+    this->edit_erase(this->cursor, -1);
   else
-    edit_erase(editor, editor->cursor, -(int64_t)prev_col_cluster);
+    this->edit_erase(this->cursor, -(int64_t)prev_col_cluster);
 }
 
-void delete_next_word(Editor *editor) {
+void Editor::delete_next_word() {
   uint32_t next_col_byte, next_col_cluster;
-  word_boundaries(editor, editor->cursor, nullptr, &next_col_byte, nullptr,
+  this->word_boundaries(this->cursor, nullptr, &next_col_byte, nullptr,
-                  &next_col_cluster);
+                        &next_col_cluster);
-  if (next_col_byte == editor->cursor.col)
+  if (next_col_byte == this->cursor.col)
-    edit_erase(editor, editor->cursor, 1);
+    this->edit_erase(this->cursor, 1);
   else
-    edit_erase(editor, editor->cursor, next_col_cluster);
+    this->edit_erase(this->cursor, next_col_cluster);
 }
 
-void clear_hooks_at_line(Editor *editor, uint32_t line) {
+void Editor::cursor_prev_word() {
-  for (uint8_t i = 0; i < 94; i++)
-    if (editor->hooks[i] == line + 1) {
-      editor->hooks[i] = 0;
-      break;
-    }
-}
-
-void cursor_prev_word(Editor *editor) {
   uint32_t prev_col;
-  word_boundaries(editor, editor->cursor, &prev_col, nullptr, nullptr, nullptr);
+  word_boundaries(this->cursor, &prev_col, nullptr, nullptr, nullptr);
-  editor->cursor_preffered = UINT32_MAX;
+  this->cursor_preffered = UINT32_MAX;
-  if (prev_col == editor->cursor.col)
+  if (prev_col == this->cursor.col)
-    cursor_left(editor, 1);
+    cursor_left(1);
   else
-    editor->cursor = {editor->cursor.row, prev_col};
+    this->cursor = {this->cursor.row, prev_col};
 }
 
-void cursor_next_word(Editor *editor) {
+void Editor::cursor_next_word() {
   uint32_t next_col;
-  word_boundaries(editor, editor->cursor, nullptr, &next_col, nullptr, nullptr);
+  word_boundaries(this->cursor, nullptr, &next_col, nullptr, nullptr);
-  editor->cursor_preffered = UINT32_MAX;
+  this->cursor_preffered = UINT32_MAX;
-  if (next_col == editor->cursor.col)
+  if (next_col == this->cursor.col)
-    cursor_right(editor, 1);
+    this->cursor_right(1);
   else
-    editor->cursor = {editor->cursor.row, next_col};
+    this->cursor = {this->cursor.row, next_col};
 }
 
-void select_all(Editor *editor) {
+void Editor::select_all() {
-  if (editor->root->line_count > 0) {
+  if (this->root->line_count > 0) {
-    editor->cursor.row = editor->root->line_count - 1;
+    this->cursor.row = this->root->line_count - 1;
-    LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+    LineIterator *it = begin_l_iter(this->root, this->cursor.row);
     if (!it)
       return;
     uint32_t line_len;
@@ -359,18 +414,19 @@ void select_all(Editor *editor) {
     line_len = count_clusters(line, line_len, 0, line_len);
     free(it->buffer);
     free(it);
-    editor->cursor.col = line_len;
+    this->cursor.col = line_len;
-    editor->cursor_preffered = UINT32_MAX;
+    this->cursor_preffered = UINT32_MAX;
     mode = SELECT;
-    editor->selection_active = true;
+    this->selection_active = true;
-    editor->selection = {0, 0};
+    this->selection = {0, 0};
-    editor->selection_type = LINE;
+    this->selection_type = LINE;
   }
 }
 
-void fetch_lsp_hover(Editor *editor) {
+void Editor::fetch_lsp_hover() {
-  if (editor->lsp && editor->lsp->allow_hover) {
+  auto lsp = this->lsp.load();
-    LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  if (lsp && lsp->allow_hover) {
+    LineIterator *it = begin_l_iter(this->root, this->cursor.row);
     uint32_t line_len;
     char *line = next_line(it, &line_len);
     if (!line) {
@@ -378,18 +434,18 @@ void fetch_lsp_hover(Editor *editor) {
       free(it);
       return;
     }
-    uint32_t col = utf8_offset_to_utf16(line, line_len, editor->cursor.col);
+    uint32_t col = utf8_offset_to_utf16(line, line_len, this->cursor.col);
     free(it->buffer);
     free(it);
-    json hover_request = {
+    auto message = std::make_unique<LSPMessage>();
-        {"jsonrpc", "2.0"},
+    message->message = {
         {"method", "textDocument/hover"},
         {"params",
-         {{"textDocument", {{"uri", editor->uri}}},
+         {{"textDocument", {{"uri", this->uri}}},
-          {"position", {{"line", editor->cursor.row}, {"character", col}}}}}};
+          {"position", {{"line", this->cursor.row}, {"character", col}}}}}};
-    LSPPending *pending = new LSPPending();
+    message->editor = this;
-    pending->editor = editor;
+    message->callback = [](const LSPMessage &message) {
-    pending->callback = [](Editor *editor, const json &hover) {
+      auto &hover = message.message;
       if (hover.contains("result") && !hover["result"].is_null()) {
         auto &contents = hover["result"]["contents"];
         std::string hover_text = "";
@@ -413,23 +469,26 @@ void fetch_lsp_hover(Editor *editor) {
           hover_text += contents.get<std::string>();
         }
         if (!hover_text.empty()) {
-          editor->hover.clear();
+          message.editor->hover_popup->clear();
-          editor->hover.text = clean_text(hover_text);
+          message.editor->hover_popup->text = clean_text(hover_text);
-          editor->hover.is_markup = is_markup;
+          message.editor->hover_popup->is_markup = is_markup;
-          editor->hover.render_first();
+          message.editor->hover_popup->hidden = false;
-          editor->hover_active = true;
         }
       }
     };
-    lsp_send(editor->lsp, hover_request, pending);
+    lsp->send(std::move(message));
   }
 }
 
-void handle_mouse(Editor *editor, KeyEvent event) {
+void Editor::handle_click(KeyEvent event, Coord size) {
+  layout::focused_window = this;
+  this->size = size;
   static std::chrono::steady_clock::time_point last_click_time =
       std::chrono::steady_clock::now();
   static uint32_t click_count = 0;
   static Coord last_click_pos = {UINT32_MAX, UINT32_MAX};
+  if (!this->hover_popup->hidden)
+    this->hover_popup->hidden = true;
   if (event.key_type == KEY_MOUSE) {
     auto now = std::chrono::steady_clock::now();
     auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(
@@ -439,18 +498,12 @@ void handle_mouse(Editor *editor, KeyEvent event) {
     case SCROLL:
       switch (event.mouse_direction) {
       case SCROLL_UP:
-        scroll_up(editor, 4);
+        this->scroll_up(1);
-        ensure_cursor(editor);
+        this->ensure_cursor();
         break;
       case SCROLL_DOWN:
-        scroll_down(editor, 4);
+        this->scroll_down(1);
-        ensure_cursor(editor);
+        this->ensure_cursor();
-        break;
-      case SCROLL_LEFT:
-        cursor_left(editor, 10);
-        break;
-      case SCROLL_RIGHT:
-        cursor_right(editor, 10);
         break;
       }
       break;
@@ -463,35 +516,35 @@ void handle_mouse(Editor *editor, KeyEvent event) {
           click_count = 1;
         last_click_time = now;
         last_click_pos = cur_pos;
-        Coord p = editor_hit_test(editor, event.mouse_x, event.mouse_y);
+        Coord p = this->click_coord(event.mouse_x, event.mouse_y);
         if (p.row == UINT32_MAX && p.col == UINT32_MAX)
           return;
-        editor->cursor_preffered = UINT32_MAX;
+        this->cursor_preffered = UINT32_MAX;
         if (click_count == 1) {
-          editor->cursor = p;
+          this->cursor = p;
-          editor->selection = p;
+          this->selection = p;
           if (mode == SELECT) {
             mode = NORMAL;
-            editor->selection_active = false;
+            this->selection_active = false;
           }
         } else if (click_count == 2) {
           uint32_t prev_col, next_col;
-          word_boundaries(editor, editor->cursor, &prev_col, &next_col, nullptr,
+          this->word_boundaries(this->cursor, &prev_col, &next_col, nullptr,
-                          nullptr);
+                                nullptr);
-          if (editor->cursor < editor->selection)
+          if (this->cursor < this->selection)
-            editor->cursor = {editor->cursor.row, prev_col};
+            this->cursor = {this->cursor.row, prev_col};
           else
-            editor->cursor = {editor->cursor.row, next_col};
+            this->cursor = {this->cursor.row, next_col};
-          editor->cursor_preffered = UINT32_MAX;
+          this->cursor_preffered = UINT32_MAX;
-          editor->selection_type = WORD;
+          this->selection_type = WORD;
           mode = SELECT;
-          editor->selection_active = true;
+          this->selection_active = true;
         } else if (click_count >= 3) {
-          if (editor->cursor < editor->selection) {
+          if (this->cursor < this->selection) {
-            editor->cursor = {p.row, 0};
+            this->cursor = {p.row, 0};
           } else {
             uint32_t line_len;
-            LineIterator *it = begin_l_iter(editor->root, p.row);
+            LineIterator *it = begin_l_iter(this->root, p.row);
             char *line = next_line(it, &line_len);
             if (!line)
               return;
@@ -499,44 +552,44 @@ void handle_mouse(Editor *editor, KeyEvent event) {
               line_len--;
             free(it->buffer);
             free(it);
-            editor->cursor = {p.row, line_len};
+            this->cursor = {p.row, line_len};
           }
-          editor->cursor_preffered = UINT32_MAX;
+          this->cursor_preffered = UINT32_MAX;
-          editor->selection_type = LINE;
+          this->selection_type = LINE;
           mode = SELECT;
-          editor->selection_active = true;
+          this->selection_active = true;
           click_count = 3;
         }
       }
       break;
     case DRAG:
       if (event.mouse_button == LEFT_BTN) {
-        Coord p = editor_hit_test(editor, event.mouse_x, event.mouse_y);
+        Coord p = this->click_coord(event.mouse_x, event.mouse_y);
         if (p.row == UINT32_MAX && p.col == UINT32_MAX)
           return;
-        editor->cursor_preffered = UINT32_MAX;
+        this->cursor_preffered = UINT32_MAX;
         mode = SELECT;
-        if (!editor->selection_active) {
+        if (!this->selection_active) {
-          editor->selection_active = true;
+          this->selection_active = true;
-          editor->selection_type = CHAR;
+          this->selection_type = CHAR;
         }
         uint32_t prev_col, next_col, line_len;
-        switch (editor->selection_type) {
+        switch (this->selection_type) {
         case CHAR:
-          editor->cursor = p;
+          this->cursor = p;
           break;
         case WORD:
-          word_boundaries(editor, p, &prev_col, &next_col, nullptr, nullptr);
+          this->word_boundaries(p, &prev_col, &next_col, nullptr, nullptr);
-          if (editor->cursor < editor->selection)
+          if (this->cursor < this->selection)
-            editor->cursor = {p.row, prev_col};
+            this->cursor = {p.row, prev_col};
           else
-            editor->cursor = {p.row, next_col};
+            this->cursor = {p.row, next_col};
           break;
         case LINE:
-          if (editor->cursor < editor->selection) {
+          if (this->cursor < this->selection) {
-            editor->cursor = {p.row, 0};
+            this->cursor = {p.row, 0};
           } else {
-            LineIterator *it = begin_l_iter(editor->root, p.row);
+            LineIterator *it = begin_l_iter(this->root, p.row);
             char *line = next_line(it, &line_len);
             if (!line)
               return;
@@ -544,7 +597,7 @@ void handle_mouse(Editor *editor, KeyEvent event) {
               line_len--;
             free(it->buffer);
             free(it);
-            editor->cursor = {p.row, line_len};
+            this->cursor = {p.row, line_len};
           }
           break;
         }
@@ -552,10 +605,10 @@ void handle_mouse(Editor *editor, KeyEvent event) {
       break;
     case RELEASE:
       if (event.mouse_button == LEFT_BTN)
-        if (editor->cursor.row == editor->selection.row &&
+        if (this->cursor.row == this->selection.row &&
-            editor->cursor.col == editor->selection.col) {
+            this->cursor.col == this->selection.col) {
           mode = NORMAL;
-          editor->selection_active = false;
+          this->selection_active = false;
         }
       break;
     }

src/editor/indents.cc

@@ -68,7 +68,6 @@ uint32_t IndentationEngine::indent_real(char *line, uint32_t len) {
 }
 
 uint32_t IndentationEngine::indent_expected(uint32_t row) {
-  std::shared_lock lock(editor->knot_mtx);
   uint32_t line_idx = row;
   if (row == 0)
     return 0;
@@ -109,7 +108,6 @@ uint32_t IndentationEngine::indent_expected(uint32_t row) {
 }
 
 uint32_t IndentationEngine::set_indent(uint32_t row, int64_t new_indent) {
-  std::shared_lock lock(editor->knot_mtx);
   LineIterator *it = begin_l_iter(editor->root, row);
   if (!it)
     return 0;
@@ -122,7 +120,6 @@ uint32_t IndentationEngine::set_indent(uint32_t row, int64_t new_indent) {
   }
   if (len > 0 && line[len - 1] == '\n')
     --len;
-  lock.unlock();
   if (new_indent <= 0)
     new_indent = 0;
   uint32_t ws_len = 0;
@@ -135,14 +132,13 @@ uint32_t IndentationEngine::set_indent(uint32_t row, int64_t new_indent) {
     new_ws.assign(new_indent * indent, ' ');
   Coord start = {row, 0};
   Coord end = {row, ws_len};
-  edit_replace(editor, start, end, new_ws.c_str(), new_ws.length());
+  editor->edit_replace(start, end, new_ws.c_str(), new_ws.length());
   free(it->buffer);
   free(it);
   return len - ws_len + (new_indent * indent);
 }
 
 uint32_t IndentationEngine::indent_line(uint32_t row) {
-  std::shared_lock lock(editor->knot_mtx);
   LineIterator *it = begin_l_iter(editor->root, row);
   if (!it)
     return 0;
@@ -153,7 +149,6 @@ uint32_t IndentationEngine::indent_line(uint32_t row) {
     free(it);
     return 0;
   }
-  lock.unlock();
   if (len > 0 && line[len - 1] == '\n')
     --len;
   uint32_t new_indent = indent_real(line, len) + 1;
@@ -165,15 +160,14 @@ uint32_t IndentationEngine::indent_line(uint32_t row) {
     new_ws.assign(new_indent, '\t');
   else
     new_ws.assign(new_indent * indent, ' ');
-  edit_replace(editor, {row, 0}, {row, ws_len}, new_ws.c_str(),
+  editor->edit_replace({row, 0}, {row, ws_len}, new_ws.c_str(),
-               new_indent * indent);
+                       new_indent * indent);
   free(it->buffer);
   free(it);
   return (uint32_t)ABS((int64_t)ws_len - (new_indent * indent));
 }
 
 uint32_t IndentationEngine::dedent_line(uint32_t row) {
-  std::shared_lock lock(editor->knot_mtx);
   LineIterator *it = begin_l_iter(editor->root, row);
   if (!it)
     return 0;
@@ -184,7 +178,6 @@ uint32_t IndentationEngine::dedent_line(uint32_t row) {
     free(it);
     return 0;
   }
-  lock.unlock();
   if (len > 0 && line[len - 1] == '\n')
     --len;
   int64_t new_indent = (int64_t)indent_real(line, len) - 1;
@@ -198,8 +191,8 @@ uint32_t IndentationEngine::dedent_line(uint32_t row) {
     new_ws.assign(new_indent, '\t');
   else
     new_ws.assign(new_indent * indent, ' ');
-  edit_replace(editor, {row, 0}, {row, ws_len}, new_ws.c_str(),
+  editor->edit_replace({row, 0}, {row, ws_len}, new_ws.c_str(),
-               new_indent * indent);
+                       new_indent * indent);
   free(it->buffer);
   free(it);
   return (uint32_t)ABS((int64_t)ws_len - (new_indent * indent));
@@ -262,12 +255,11 @@ void IndentationEngine::indent_block(uint32_t start_row, uint32_t end_row,
     }
   }
   free(block);
-  edit_replace(editor, {start_row, 0}, {end_row, end_len}, out, out_len);
+  editor->edit_replace({start_row, 0}, {end_row, end_len}, out, out_len);
   free(out);
 }
 
 void IndentationEngine::insert_tab(Coord cursor) {
-  std::shared_lock lock(editor->knot_mtx);
   LineIterator *it = begin_l_iter(editor->root, cursor.row);
   if (!it)
     return;
@@ -278,7 +270,6 @@ void IndentationEngine::insert_tab(Coord cursor) {
     free(it);
     return;
   }
-  lock.unlock();
   if (len > 0 && line[len - 1] == '\n')
     --len;
   uint32_t ws_len = 0;
@@ -295,13 +286,12 @@ void IndentationEngine::insert_tab(Coord cursor) {
   }
   free(it->buffer);
   free(it);
-  edit_insert(editor, cursor, (char *)insert.c_str(), insert.size());
+  editor->edit_insert(cursor, (char *)insert.c_str(), insert.size());
   editor->cursor.col += insert.size();
 }
 
 void IndentationEngine::insert_new_line(Coord cursor) {
   std::string formatted;
-  std::shared_lock lock(editor->knot_mtx);
   LineIterator *it = begin_l_iter(editor->root, cursor.row);
   if (!it)
     return;
@@ -312,7 +302,6 @@ void IndentationEngine::insert_new_line(Coord cursor) {
     free(it);
     return;
   }
-  lock.unlock();
   if (len > 0 && line[len - 1] == '\n')
     --len;
   if (cursor.col >= len) {
@@ -332,7 +321,6 @@ void IndentationEngine::insert_new_line(Coord cursor) {
               cursor.row, (int64_t)indent_expected(cursor.row) - (int64_t)1);
           break;
         }
-    lock.lock();
     free(it->buffer);
     free(it);
     it = begin_l_iter(editor->root, cursor.row);
@@ -346,7 +334,6 @@ void IndentationEngine::insert_new_line(Coord cursor) {
     }
     if (len > 0 && line[len - 1] == '\n')
       --len;
-    lock.unlock();
   }
   std::string ending = trim(std::string(line + cursor.col, len - cursor.col));
   std::string before = trim(std::string(line, cursor.col));
@@ -407,15 +394,16 @@ void IndentationEngine::insert_new_line(Coord cursor) {
                            : std::string(c_indent * indent, ' ')) +
               ending;
   Coord new_cursor = {cursor.row + 1, (uint32_t)c_indent * indent};
-  edit_replace(editor, cursor, {cursor.row, len}, formatted.data(),
+  editor->edit_replace(cursor, {cursor.row, len}, formatted.data(),
-               formatted.size());
+                       formatted.size());
   editor->cursor = new_cursor;
   editor->cursor_preffered = UINT32_MAX;
   free(it->buffer);
   free(it);
-  if (!editor->lsp || !editor->lsp->allow_formatting_on_type)
+  auto lsp = editor->lsp.load();
+  if (!lsp || !lsp->allow_formatting_on_type)
     return;
-  for (char ch : editor->lsp->format_chars) {
+  for (char ch : lsp->format_chars) {
     if (ch == '\n') {
       LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
       if (!it)
@@ -431,7 +419,9 @@ void IndentationEngine::insert_new_line(Coord cursor) {
       free(it->buffer);
       free(it);
       int version = editor->lsp_version;
-      json message = {
+      auto message = std::make_unique<LSPMessage>();
+      message->editor = editor;
+      message->message = {
           {"jsonrpc", "2.0"},
           {"method", "textDocument/onTypeFormatting"},
           {"params",
@@ -443,12 +433,10 @@ void IndentationEngine::insert_new_line(Coord cursor) {
               {"insertSpaces", true},
               {"trimTrailingWhitespace", true},
               {"trimFinalNewlines", true}}}}}};
-      LSPPending *pending = new LSPPending();
+      message->callback = [version](const LSPMessage &message) {
-      pending->editor = editor;
+        if (version != message.editor->lsp_version)
-      pending->callback = [version](Editor *editor, const json &message) {
-        if (version != editor->lsp_version)
           return;
-        auto &edits = message["result"];
+        auto &edits = message.message["result"];
         if (edits.is_array()) {
           std::vector<TextEdit> t_edits;
           t_edits.reserve(edits.size());
@@ -459,14 +447,14 @@ void IndentationEngine::insert_new_line(Coord cursor) {
             t_edit.start.col = edit["range"]["start"]["character"];
             t_edit.end.row = edit["range"]["end"]["line"];
             t_edit.end.col = edit["range"]["end"]["character"];
-            utf8_normalize_edit(editor, &t_edit);
+            message.editor->utf8_normalize_edit(&t_edit);
             t_edits.push_back(t_edit);
           }
-          apply_lsp_edits(editor, t_edits, false);
+          message.editor->apply_lsp_edits(t_edits, false);
-          ensure_scroll(editor);
+          message.editor->ensure_scroll();
         }
       };
-      lsp_send(editor->lsp, message, pending);
+      lsp->send(std::move(message));
       break;
     }
   }

src/editor/lsp.cc

@@ -2,52 +2,47 @@
 #include "editor/editor.h"
 #include "utils/utils.h"
 
-void apply_lsp_edits(Editor *editor, std::vector<TextEdit> edits, bool move) {
+void Editor::apply_lsp_edits(std::vector<TextEdit> edits, bool move) {
   if (!edits.size())
     return;
   TextEdit first = edits[0];
-  Coord cursor = editor->cursor;
+  Coord cursor = this->cursor;
   std::sort(
       edits.begin(), edits.end(),
       [](const TextEdit &a, const TextEdit &b) { return a.start > b.start; });
   for (const auto &edit : edits)
-    edit_replace(editor, edit.start, edit.end, edit.text.c_str(),
+    this->edit_replace(edit.start, edit.end, edit.text.c_str(),
-                 edit.text.size());
+                       edit.text.size());
   if (move) {
-    std::shared_lock lock(editor->knot_mtx);
+    this->cursor = first.start;
-    editor->cursor = first.start;
+    this->cursor = this->move_right(
-    editor->cursor =
+        this->cursor, count_clusters(first.text.c_str(), first.text.size(), 0,
-        move_right(editor, editor->cursor,
+                                     first.text.size()));
-                   count_clusters(first.text.c_str(), first.text.size(), 0,
-                                  first.text.size()));
   } else {
-    if (cursor.row >= editor->root->line_count) {
+    if (cursor.row >= this->root->line_count) {
-      editor->cursor.row = editor->root->line_count - 1;
+      this->cursor.row = this->root->line_count - 1;
-      editor->cursor.col = 0;
+      this->cursor.col = 0;
     } else {
-      std::shared_lock lock(editor->knot_mtx);
       uint32_t len;
-      line_to_byte(editor->root, cursor.row, &len);
+      line_to_byte(this->root, cursor.row, &len);
       len--;
-      editor->cursor.row = cursor.row;
+      this->cursor.row = cursor.row;
-      editor->cursor.col = cursor.col < len ? cursor.col : len;
+      this->cursor.col = cursor.col < len ? cursor.col : len;
     }
   }
 }
 
-void editor_lsp_handle(Editor *editor, json msg) {
+void Editor::lsp_handle(json msg) {
   if (msg.contains("method") &&
       msg["method"] == "textDocument/publishDiagnostics") {
-    std::unique_lock lock(editor->v_mtx);
+    this->warnings.clear();
-    editor->warnings.clear();
     json diagnostics = msg["params"]["diagnostics"];
     for (size_t i = 0; i < diagnostics.size(); i++) {
       json d = diagnostics[i];
       VWarn w;
       w.line = d["range"]["start"]["line"];
       w.start = d["range"]["start"]["character"];
-      std::shared_lock lock(editor->knot_mtx);
+      LineIterator *it = begin_l_iter(this->root, w.line);
-      LineIterator *it = begin_l_iter(editor->root, w.line);
       if (!it)
         continue;
       uint32_t len;
@@ -59,7 +54,6 @@ void editor_lsp_handle(Editor *editor, json msg) {
       }
       if (len > 0 && line[len - 1] == '\n')
         --len;
-      lock.unlock();
       w.start = utf16_offset_to_utf8(line, len, w.start);
       uint32_t end = d["range"]["end"]["character"];
       if (d["range"]["end"]["line"] == w.line)
@@ -102,9 +96,9 @@ void editor_lsp_handle(Editor *editor, json msg) {
       w.type = 1;
       if (d.contains("severity"))
         w.type = d["severity"].get<int>();
-      editor->warnings.push_back(w);
+      this->warnings.push_back(w);
     }
-    std::sort(editor->warnings.begin(), editor->warnings.end());
+    std::sort(this->warnings.begin(), this->warnings.end());
-    editor->warnings_dirty = true;
+    this->warnings_dirty = true;
   }
 }

src/editor/move_line.cc

@@ -1,120 +1,108 @@
 #include "editor/editor.h"
 #include "main.h"
 
-void move_line_up(Editor *editor) {
+void Editor::move_line_up() {
-  if (!editor || !editor->root || editor->cursor.row == 0)
+  if (!this->root || this->cursor.row == 0)
     return;
   if (mode == NORMAL || mode == INSERT) {
     uint32_t line_len, line_cluster_len;
-    std::shared_lock lock(editor->knot_mtx);
+    LineIterator *it = begin_l_iter(this->root, this->cursor.row);
-    LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
     char *line = next_line(it, &line_len);
-    if (!line) {
+    if (!line)
-      lock.unlock();
       return;
-    }
     if (line_len > 0 && line[line_len - 1] == '\n')
       line_len--;
     line_cluster_len = count_clusters(line, line_len, 0, line_len);
-    uint32_t target_row = editor->cursor.row - 1;
+    uint32_t target_row = this->cursor.row - 1;
-    uint32_t up_by = editor->cursor.row - target_row;
+    uint32_t up_by = this->cursor.row - target_row;
     if (up_by > 1)
       up_by--;
-    lock.unlock();
+    Coord cursor = this->cursor;
-    Coord cursor = editor->cursor;
+    edit_erase({cursor.row, 0}, line_cluster_len);
-    edit_erase(editor, {cursor.row, 0}, line_cluster_len);
+    edit_erase({cursor.row, 0}, -1);
-    edit_erase(editor, {cursor.row, 0}, -1);
+    edit_insert({cursor.row - up_by, 0}, (char *)"\n", 1);
-    edit_insert(editor, {cursor.row - up_by, 0}, (char *)"\n", 1);
+    edit_insert({cursor.row - up_by, 0}, line, line_len);
-    edit_insert(editor, {cursor.row - up_by, 0}, line, line_len);
     free(it->buffer);
     free(it);
-    editor->cursor = {cursor.row - up_by, cursor.col};
+    this->cursor = {cursor.row - up_by, cursor.col};
   } else if (mode == SELECT) {
-    uint32_t start_row = MIN(editor->cursor.row, editor->selection.row);
+    uint32_t start_row = MIN(this->cursor.row, this->selection.row);
-    uint32_t end_row = MAX(editor->cursor.row, editor->selection.row);
+    uint32_t end_row = MAX(this->cursor.row, this->selection.row);
-    uint32_t start_byte = line_to_byte(editor->root, start_row, nullptr);
+    uint32_t start_byte = line_to_byte(this->root, start_row, nullptr);
-    uint32_t end_byte = line_to_byte(editor->root, end_row + 1, nullptr);
+    uint32_t end_byte = line_to_byte(this->root, end_row + 1, nullptr);
-    char *selected_text = read(editor->root, start_byte, end_byte - start_byte);
+    char *selected_text = read(this->root, start_byte, end_byte - start_byte);
     if (!selected_text)
       return;
     uint32_t selected_len = count_clusters(selected_text, end_byte - start_byte,
                                            0, end_byte - start_byte);
-    Coord cursor = editor->cursor;
+    Coord cursor = this->cursor;
-    Coord selection = editor->selection;
+    Coord selection = this->selection;
-    edit_erase(editor, {start_row, 0}, selected_len);
+    edit_erase({start_row, 0}, selected_len);
-    edit_insert(editor, {start_row - 1, 0}, selected_text,
+    edit_insert({start_row - 1, 0}, selected_text, end_byte - start_byte);
-                end_byte - start_byte);
     free(selected_text);
-    editor->cursor = {cursor.row - 1, cursor.col};
+    this->cursor = {cursor.row - 1, cursor.col};
-    editor->selection = {selection.row - 1, selection.col};
+    this->selection = {selection.row - 1, selection.col};
   }
 }
 
-void move_line_down(Editor *editor) {
+void Editor::move_line_down() {
-  if (!editor || !editor->root)
+  if (!this->root)
     return;
   if (mode == NORMAL || mode == INSERT) {
-    if (editor->cursor.row >= editor->root->line_count - 1)
+    if (this->cursor.row >= this->root->line_count - 1)
       return;
     uint32_t line_len, line_cluster_len;
-    std::shared_lock lock(editor->knot_mtx);
+    LineIterator *it = begin_l_iter(this->root, this->cursor.row);
-    LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
     char *line = next_line(it, &line_len);
-    if (!line) {
+    if (!line)
-      lock.unlock();
       return;
-    }
     if (line_len && line[line_len - 1] == '\n')
       line_len--;
     line_cluster_len = count_clusters(line, line_len, 0, line_len);
-    uint32_t target_row = editor->cursor.row + 1;
+    uint32_t target_row = this->cursor.row + 1;
-    if (target_row >= editor->root->line_count) {
+    if (target_row >= this->root->line_count) {
-      free(line);
+      free(it->buffer);
-      lock.unlock();
+      free(it);
       return;
     }
-    uint32_t down_by = target_row - editor->cursor.row;
+    uint32_t down_by = target_row - this->cursor.row;
     if (down_by > 1)
       down_by--;
     uint32_t ln;
-    line_to_byte(editor->root, editor->cursor.row + down_by - 1, &ln);
+    line_to_byte(this->root, this->cursor.row + down_by - 1, &ln);
-    lock.unlock();
+    Coord cursor = this->cursor;
-    Coord cursor = editor->cursor;
+    edit_erase({cursor.row, 0}, line_cluster_len);
-    edit_erase(editor, {cursor.row, 0}, line_cluster_len);
+    edit_erase({cursor.row, 0}, -1);
-    edit_erase(editor, {cursor.row, 0}, -1);
+    edit_insert({cursor.row + down_by, 0}, (char *)"\n", 1);
-    edit_insert(editor, {cursor.row + down_by, 0}, (char *)"\n", 1);
+    edit_insert({cursor.row + down_by, 0}, line, line_len);
-    edit_insert(editor, {cursor.row + down_by, 0}, line, line_len);
     free(it->buffer);
     free(it);
-    editor->cursor = {cursor.row + down_by, cursor.col};
+    this->cursor = {cursor.row + down_by, cursor.col};
   } else if (mode == SELECT) {
-    if (editor->cursor.row >= editor->root->line_count - 1 ||
+    if (this->cursor.row >= this->root->line_count - 1 ||
-        editor->selection.row >= editor->root->line_count - 1)
+        this->selection.row >= this->root->line_count - 1)
       return;
-    std::shared_lock lock(editor->knot_mtx);
+    uint32_t start_row = MIN(this->cursor.row, this->selection.row);
-    uint32_t start_row = MIN(editor->cursor.row, editor->selection.row);
+    uint32_t end_row = MAX(this->cursor.row, this->selection.row);
-    uint32_t end_row = MAX(editor->cursor.row, editor->selection.row);
     uint32_t target_row = end_row + 1;
-    if (target_row >= editor->root->line_count)
+    if (target_row >= this->root->line_count)
       return;
     uint32_t down_by = target_row - end_row;
     if (down_by > 1)
       down_by--;
-    uint32_t start_byte = line_to_byte(editor->root, start_row, nullptr);
+    uint32_t start_byte = line_to_byte(this->root, start_row, nullptr);
-    uint32_t end_byte = line_to_byte(editor->root, end_row + 1, nullptr);
+    uint32_t end_byte = line_to_byte(this->root, end_row + 1, nullptr);
-    char *selected_text = read(editor->root, start_byte, end_byte - start_byte);
+    char *selected_text = read(this->root, start_byte, end_byte - start_byte);
-    lock.unlock();
     if (!selected_text)
       return;
     uint32_t selected_len = count_clusters(selected_text, end_byte - start_byte,
                                            0, end_byte - start_byte);
-    Coord cursor = editor->cursor;
+    Coord cursor = this->cursor;
-    Coord selection = editor->selection;
+    Coord selection = this->selection;
-    edit_erase(editor, {start_row, 0}, selected_len);
+    edit_erase({start_row, 0}, selected_len);
-    edit_insert(editor, {start_row + down_by, 0}, selected_text,
+    edit_insert({start_row + down_by, 0}, selected_text, end_byte - start_byte);
-                end_byte - start_byte);
     free(selected_text);
-    editor->cursor = {cursor.row + down_by, cursor.col};
+    this->cursor = {cursor.row + down_by, cursor.col};
-    editor->selection = {selection.row + down_by, selection.col};
+    this->selection = {selection.row + down_by, selection.col};
   }
 }

src/editor/renderer.cc

@@ -3,27 +3,17 @@
 #include "main.h"
 #include "syntax/decl.h"
 #include "syntax/parser.h"
-#include <cstdint>
 
-void render_editor(Editor *editor) {
+void Editor::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
+  this->size = size;
   uint32_t sel_start = 0, sel_end = 0;
-  std::shared_lock knot_lock(editor->knot_mtx);
   uint32_t numlen =
-      EXTRA_META + static_cast<int>(std::log10(editor->root->line_count + 1));
+      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
-  uint32_t render_width = editor->size.col - numlen;
+  uint32_t render_width = size.col - numlen - 1;
-  uint32_t render_x = editor->position.col + numlen + 1;
+  uint32_t render_x = pos.col + numlen + 1;
-  std::vector<std::pair<uint32_t, char>> v;
+  this->hooks.start_iter(this->scroll.row);
-  for (size_t i = 0; i < 94; ++i)
+  auto warn_it = this->warnings.begin();
-    if (editor->hooks[i] != 0)
+  while (warn_it != this->warnings.end() && warn_it->line < this->scroll.row)
-      v.push_back({editor->hooks[i], '!' + i});
-  std::sort(v.begin(), v.end());
-  auto hook_it = v.begin();
-  while (hook_it != v.end() && hook_it->first <= editor->scroll.row)
-    ++hook_it;
-  std::unique_lock warn_lock(editor->v_mtx);
-  auto warn_it = editor->warnings.begin();
-  while (warn_it != editor->warnings.end() &&
-         warn_it->line < editor->scroll.row)
     ++warn_it;
   LineData *line_data = nullptr;
   auto get_type = [&](uint32_t col) {
@@ -34,40 +24,54 @@ void render_editor(Editor *editor) {
         return (int)token.type;
     return 0;
   };
-  if (editor->selection_active) {
+  Coord screen = {io::rows, io::cols};
+  auto update = [&](uint32_t row, uint32_t col, std::string text, uint32_t fg,
+                    uint32_t bg, uint8_t flags, uint32_t u_color,
+                    uint32_t width) {
+    if (row >= screen.row || col >= screen.col)
+      return;
+    ScreenCell &c = buffer[row * screen.col + col];
+    c.utf8 = text;
+    c.width = width;
+    c.fg = fg;
+    c.bg = bg;
+    c.flags = flags;
+    c.ul_color = u_color;
+  };
+  if (this->selection_active) {
     Coord start, end;
-    if (editor->cursor >= editor->selection) {
+    if (this->cursor >= this->selection) {
       uint32_t prev_col, next_col;
-      switch (editor->selection_type) {
+      switch (this->selection_type) {
       case CHAR:
-        start = editor->selection;
+        start = this->selection;
-        end = move_right(editor, editor->cursor, 1);
+        end = this->move_right(this->cursor, 1);
         break;
       case WORD:
-        word_boundaries(editor, editor->selection, &prev_col, &next_col,
+        this->word_boundaries(this->selection, &prev_col, &next_col, nullptr,
-                        nullptr, nullptr);
+                              nullptr);
-        start = {editor->selection.row, prev_col};
+        start = {this->selection.row, prev_col};
-        end = editor->cursor;
+        end = this->cursor;
         break;
       case LINE:
-        start = {editor->selection.row, 0};
+        start = {this->selection.row, 0};
-        end = editor->cursor;
+        end = this->cursor;
         break;
       }
     } else {
-      start = editor->cursor;
+      start = this->cursor;
       uint32_t prev_col, next_col, line_len;
-      switch (editor->selection_type) {
+      switch (this->selection_type) {
       case CHAR:
-        end = move_right(editor, editor->selection, 1);
+        end = this->move_right(this->selection, 1);
         break;
       case WORD:
-        word_boundaries(editor, editor->selection, &prev_col, &next_col,
+        this->word_boundaries(this->selection, &prev_col, &next_col, nullptr,
-                        nullptr, nullptr);
+                              nullptr);
-        end = {editor->selection.row, next_col};
+        end = {this->selection.row, next_col};
         break;
       case LINE:
-        LineIterator *it = begin_l_iter(editor->root, editor->selection.row);
+        LineIterator *it = begin_l_iter(this->root, this->selection.row);
         char *line = next_line(it, &line_len);
         if (!line)
           return;
@@ -75,41 +79,37 @@ void render_editor(Editor *editor) {
           line_len--;
         free(it->buffer);
         free(it);
-        end = {editor->selection.row, line_len};
+        end = {this->selection.row, line_len};
         break;
       }
     }
-    sel_start = line_to_byte(editor->root, start.row, nullptr) + start.col;
+    sel_start = line_to_byte(this->root, start.row, nullptr) + start.col;
-    sel_end = line_to_byte(editor->root, end.row, nullptr) + end.col;
+    sel_end = line_to_byte(this->root, end.row, nullptr) + end.col;
   }
   Coord cursor = {UINT32_MAX, UINT32_MAX};
-  uint32_t line_index = editor->scroll.row;
+  uint32_t line_index = this->scroll.row;
-  LineIterator *it = begin_l_iter(editor->root, line_index);
+  LineIterator *it = begin_l_iter(this->root, line_index);
   if (!it)
     return;
   uint32_t prev_col, next_col;
   std::string word;
-  word_boundaries_exclusive(editor, editor->cursor, &prev_col, &next_col);
+  this->word_boundaries_exclusive(this->cursor, &prev_col, &next_col);
   if (next_col - prev_col > 0 && next_col - prev_col < 256 - 4) {
-    uint32_t offset = line_to_byte(editor->root, editor->cursor.row, nullptr);
+    uint32_t offset = line_to_byte(this->root, this->cursor.row, nullptr);
-    char *word_ptr = read(editor->root, offset + prev_col, next_col - prev_col);
+    char *word_ptr = read(this->root, offset + prev_col, next_col - prev_col);
     if (word_ptr) {
       word = std::string(word_ptr, next_col - prev_col);
       free(word_ptr);
     }
   }
-  editor->extra_hl.render(editor->root, line_index, word, editor->is_css_color);
+  this->extra_hl.render(this->root, line_index, word, this->is_css_color);
   uint32_t rendered_rows = 0;
-  uint32_t global_byte_offset = line_to_byte(editor->root, line_index, nullptr);
+  uint32_t global_byte_offset = line_to_byte(this->root, line_index, nullptr);
-  while (rendered_rows < editor->size.row) {
+  while (rendered_rows < this->size.row) {
     uint32_t line_len;
     char *line = next_line(it, &line_len);
-    if (editor->parser) {
+    if (this->parser)
-      if (line_data)
+      line_data = this->parser->line_map.at(line_index);
-        line_data = editor->parser->line_tree.next();
-      else
-        line_data = editor->parser->line_tree.start_iter(line_index);
-    }
     if (!line)
       break;
     if (line_len > 0 && line[line_len - 1] == '\n')
@@ -123,54 +123,46 @@ void render_editor(Editor *editor) {
            (line[content_start] == ' ' || line[content_start] == '\t'))
       content_start++;
     std::vector<VWarn> line_warnings;
-    while (warn_it != editor->warnings.end() && warn_it->line == line_index) {
+    while (warn_it != this->warnings.end() && warn_it->line == line_index) {
       line_warnings.push_back(*warn_it);
       ++warn_it;
     }
     uint32_t current_byte_offset = 0;
     if (rendered_rows == 0)
-      current_byte_offset += editor->scroll.col;
+      current_byte_offset += this->scroll.col;
-    while (current_byte_offset < line_len && rendered_rows < editor->size.row) {
+    while (current_byte_offset < line_len && rendered_rows < this->size.row) {
-      uint32_t color = editor->cursor.row == line_index ? 0x222222 : 0;
+      uint32_t color = this->cursor.row == line_index ? 0x222222 : 0;
       if (current_byte_offset == 0 || rendered_rows == 0) {
-        const char *hook = nullptr;
+        char hook = this->hooks.next(line_index);
-        char h[2] = {0, 0};
+        update(pos.row + rendered_rows, pos.col, {hook, 0}, 0xAAAAAA, 0, 0, 0,
-        if (hook_it != v.end() && hook_it->first == line_index + 1) {
+               1);
-          h[0] = hook_it->second;
-          hook = h;
-          hook_it++;
-        }
-        update(editor->position.row + rendered_rows, editor->position.col, hook,
-               0xAAAAAA, 0, 0);
         char buf[16];
         int len = snprintf(buf, sizeof(buf), "%*u ", numlen, line_index + 1);
         uint32_t num_color =
-            editor->cursor.row == line_index ? 0xFFFFFF : 0x555555;
+            this->cursor.row == line_index ? 0xFFFFFF : 0x555555;
         for (int i = 0; i < len; i++)
-          update(editor->position.row + rendered_rows, editor->position.col + i,
+          update(pos.row + rendered_rows, pos.col + i, (char[2]){buf[i], 0},
-                 (char[2]){buf[i], 0}, num_color, 0, 0);
+                 num_color, 0, 0, 0, 1);
       } else {
         for (uint32_t i = 0; i < numlen + 1; i++)
-          update(editor->position.row + rendered_rows, editor->position.col + i,
+          update(pos.row + rendered_rows, pos.col + i, " ", 0, 0, 0, 0, 1);
-                 " ", 0, 0, 0);
       }
       uint32_t col = 0;
       uint32_t local_render_offset = 0;
       uint32_t line_left = line_len - current_byte_offset;
       while (line_left > 0 && col < render_width) {
-        if (line_index == editor->cursor.row &&
+        if (line_index == this->cursor.row &&
-            editor->cursor.col == (current_byte_offset + local_render_offset)) {
+            this->cursor.col == (current_byte_offset + local_render_offset)) {
-          cursor.row = editor->position.row + rendered_rows;
+          cursor.row = pos.row + rendered_rows;
           cursor.col = render_x + col;
         }
         uint32_t absolute_byte_pos =
             global_byte_offset + current_byte_offset + local_render_offset;
         const Highlight *hl = nullptr;
-        if (editor->parser)
+        if (this->parser)
           hl = &highlights[get_type(current_byte_offset + local_render_offset)];
-        std::optional<std::pair<uint32_t, uint32_t>> extra =
+        std::optional<std::pair<uint32_t, uint32_t>> extra = this->extra_hl.get(
-            editor->extra_hl.get(
+            {line_index, current_byte_offset + local_render_offset});
-                {line_index, current_byte_offset + local_render_offset});
         uint32_t fg = extra && extra->second != UINT32_MAX
                           ? extra->first
                           : (hl ? hl->fg : 0xFFFFFF);
@@ -181,7 +173,7 @@ void render_editor(Editor *editor) {
             (hl ? hl->flags : 0) |
             (extra ? (extra->second != UINT32_MAX ? CF_BOLD : CF_UNDERLINE)
                    : 0);
-        if (editor->selection_active && absolute_byte_pos >= sel_start &&
+        if (this->selection_active && absolute_byte_pos >= sel_start &&
             absolute_byte_pos < sel_end)
           bg = bg | 0x555555;
         uint32_t u_color = 0;
@@ -217,40 +209,39 @@ void render_editor(Editor *editor) {
           break;
         if (current_byte_offset + local_render_offset >= content_start &&
             current_byte_offset + local_render_offset < content_end) {
-          update(editor->position.row + rendered_rows, render_x + col,
+          update(pos.row + rendered_rows, render_x + col, cluster.c_str(), fg,
-                 cluster.c_str(), fg, bg | color, fl, u_color);
+                 bg | color, fl, u_color, width);
         } else {
           if (cluster[0] == ' ') {
-            update(editor->position.row + rendered_rows, render_x + col, "·",
+            update(pos.row + rendered_rows, render_x + col, "·", 0x282828,
-                   0x282828, bg | color, fl, u_color);
+                   bg | color, fl, u_color, 1);
           } else {
-            update(editor->position.row + rendered_rows, render_x + col, "->  ",
+            update(pos.row + rendered_rows, render_x + col, "->  ", 0x282828,
-                   0x282828, bg | color, (fl & ~CF_BOLD) | CF_ITALIC, u_color);
+                   bg | color, (fl & ~CF_BOLD) | CF_ITALIC, u_color, 4);
           }
         }
         local_render_offset += cluster_len;
         line_left -= cluster_len;
         col += width;
         while (width-- > 1)
-          update(editor->position.row + rendered_rows, render_x + col - width,
+          update(pos.row + rendered_rows, render_x + col - width, "\x1b", fg,
-                 "\x1b", fg, bg | color, fl);
+                 bg | color, fl, u_color, 0);
       }
-      if (line_index == editor->cursor.row &&
+      if (line_index == this->cursor.row &&
-          editor->cursor.col == (current_byte_offset + local_render_offset)) {
+          this->cursor.col == (current_byte_offset + local_render_offset)) {
-        cursor.row = editor->position.row + rendered_rows;
+        cursor.row = pos.row + rendered_rows;
         cursor.col = render_x + col;
       }
-      if (editor->selection_active &&
+      if (this->selection_active &&
           global_byte_offset + line_len + 1 > sel_start &&
           global_byte_offset + line_len + 1 <= sel_end && col < render_width) {
-        update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+        update(pos.row + rendered_rows, render_x + col, " ", 0,
-               0x555555 | color, 0);
+               0x555555 | color, 0, 0, 1);
         col++;
       }
       if (!line_warnings.empty() && line_left == 0) {
         VWarn warn = line_warnings.front();
-        update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+        update(pos.row + rendered_rows, render_x + col, " ", 0, color, 0, 0, 1);
-               color, 0);
         col++;
         for (size_t i = 0; i < line_warnings.size(); i++) {
           if (line_warnings[i].type < warn.type)
@@ -276,18 +267,18 @@ void render_editor(Editor *editor) {
             goto final;
           final:
             if (col < render_width) {
-              update(editor->position.row + rendered_rows, render_x + col,
+              update(pos.row + rendered_rows, render_x + col, err_sym, fg_color,
-                     err_sym, fg_color, color, 0);
+                     color, 0, 0, 1);
               col++;
-              update(editor->position.row + rendered_rows, render_x + col, " ",
+              update(pos.row + rendered_rows, render_x + col, " ", fg_color,
-                     fg_color, color, 0);
+                     color, 0, 0, 1);
               col++;
             }
           }
         }
         if (col < render_width) {
-          update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+          update(pos.row + rendered_rows, render_x + col, " ", 0, 0 | color, 0,
-                 0 | color, 0);
+                 0, 1);
           col++;
         }
         size_t warn_idx = 0;
@@ -313,19 +304,19 @@ void render_editor(Editor *editor) {
           int width = display_width(cluster.c_str(), cluster_len);
           if (col + width > render_width)
             break;
-          update(editor->position.row + rendered_rows, render_x + col,
+          update(pos.row + rendered_rows, render_x + col, cluster.c_str(),
-                 cluster.c_str(), fg_color, color, 0);
+                 fg_color, color, 0, 0, width);
           col += width;
           warn_idx += cluster_len;
           while (width-- > 1)
-            update(editor->position.row + rendered_rows, render_x + col - width,
+            update(pos.row + rendered_rows, render_x + col - width, "\x1b",
-                   "\x1b", fg_color, color, 0);
+                   fg_color, color, 0, 0, 0);
         }
         line_warnings.clear();
       }
       while (col < render_width) {
-        update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+        update(pos.row + rendered_rows, render_x + col, " ", 0, 0 | color, 0, 0,
-               0 | color, 0);
+               1);
         col++;
       }
       rendered_rows++;
@@ -333,39 +324,30 @@ void render_editor(Editor *editor) {
     }
     if (line_len == 0 ||
         (current_byte_offset >= line_len && rendered_rows == 0)) {
-      uint32_t color = editor->cursor.row == line_index ? 0x222222 : 0;
+      uint32_t color = this->cursor.row == line_index ? 0x222222 : 0;
-      const char *hook = nullptr;
+      char hook = this->hooks.next(line_index);
-      char h[2] = {0, 0};
+      update(pos.row + rendered_rows, pos.col, {hook, 0}, 0xAAAAAA, 0, 0, 0, 1);
-      if (hook_it != v.end() && hook_it->first == line_index + 1) {
-        h[0] = hook_it->second;
-        hook = h;
-        hook_it++;
-      }
-      update(editor->position.row + rendered_rows, editor->position.col, hook,
-             0xAAAAAA, 0, 0);
       char buf[16];
       int len = snprintf(buf, sizeof(buf), "%*u ", numlen, line_index + 1);
-      uint32_t num_color =
+      uint32_t num_color = this->cursor.row == line_index ? 0xFFFFFF : 0x555555;
-          editor->cursor.row == line_index ? 0xFFFFFF : 0x555555;
       for (int i = 0; i < len; i++)
-        update(editor->position.row + rendered_rows, editor->position.col + i,
+        update(pos.row + rendered_rows, pos.col + i, (char[2]){buf[i], 0},
-               (char[2]){buf[i], 0}, num_color, 0, 0);
+               num_color, 0, 0, 0, 1);
-      if (editor->cursor.row == line_index) {
+      if (this->cursor.row == line_index) {
-        cursor.row = editor->position.row + rendered_rows;
+        cursor.row = pos.row + rendered_rows;
         cursor.col = render_x;
       }
       uint32_t col = 0;
-      if (editor->selection_active &&
+      if (this->selection_active &&
           global_byte_offset + line_len + 1 > sel_start &&
           global_byte_offset + line_len + 1 <= sel_end) {
-        update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+        update(pos.row + rendered_rows, render_x + col, " ", 0,
-               0x555555 | color, 0);
+               0x555555 | color, 0, 0, 1);
         col++;
       }
       if (!line_warnings.empty()) {
         VWarn warn = line_warnings.front();
-        update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+        update(pos.row + rendered_rows, render_x + col, " ", 0, color, 0, 0, 1);
-               color, 0);
         col++;
         for (size_t i = 0; i < line_warnings.size(); i++) {
           if (line_warnings[i].type < warn.type)
@@ -391,18 +373,18 @@ void render_editor(Editor *editor) {
             goto final2;
           final2:
             if (col < render_width) {
-              update(editor->position.row + rendered_rows, render_x + col,
+              update(pos.row + rendered_rows, render_x + col, err_sym, fg_color,
-                     err_sym, fg_color, color, 0);
+                     color, 0, 0, 1);
               col++;
-              update(editor->position.row + rendered_rows, render_x + col, " ",
+              update(pos.row + rendered_rows, render_x + col, " ", fg_color,
-                     fg_color, color, 0);
+                     color, 0, 0, 1);
               col++;
             }
           }
         }
         if (col < render_width) {
-          update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+          update(pos.row + rendered_rows, render_x + col, " ", 0, 0 | color, 0,
-                 0 | color, 0);
+                 0, 1);
           col++;
         }
         size_t warn_idx = 0;
@@ -428,18 +410,18 @@ void render_editor(Editor *editor) {
           int width = display_width(cluster.c_str(), cluster_len);
           if (col + width > render_width)
             break;
-          update(editor->position.row + rendered_rows, render_x + col,
+          update(pos.row + rendered_rows, render_x + col, cluster.c_str(),
-                 cluster.c_str(), fg_color, color, 0);
+                 fg_color, color, 0, 0, width);
           col += width;
           warn_idx += cluster_len;
           while (width-- > 1)
-            update(editor->position.row + rendered_rows, render_x + col - width,
+            update(pos.row + rendered_rows, render_x + col - width, "\x1b",
-                   "\x1b", fg_color, color, 0);
+                   fg_color, color, 0, 0, 0);
         }
       }
       while (col < render_width) {
-        update(editor->position.row + rendered_rows, render_x + col, " ", 0,
+        update(pos.row + rendered_rows, render_x + col, " ", 0, 0 | color, 0, 0,
-               0 | color, 0);
+               1);
         col++;
       }
       rendered_rows++;
@@ -447,10 +429,9 @@ void render_editor(Editor *editor) {
     global_byte_offset += line_len + 1;
     line_index++;
   }
-  while (rendered_rows < editor->size.row) {
+  while (rendered_rows < this->size.row) {
-    for (uint32_t col = 0; col < editor->size.col; col++)
+    for (uint32_t col = 0; col < this->size.col; col++)
-      update(editor->position.row + rendered_rows, editor->position.col + col,
+      update(pos.row + rendered_rows, pos.col + col, " ", 0xFFFFFF, 0, 0, 0, 1);
-             " ", 0xFFFFFF, 0, 0);
     rendered_rows++;
   }
   if (cursor.row != UINT32_MAX && cursor.col != UINT32_MAX) {
@@ -468,15 +449,13 @@ void render_editor(Editor *editor) {
       break;
     }
     set_cursor(cursor.row, cursor.col, type, true);
-    if (editor->completion.active && !editor->completion.box.hidden)
+    if (!this->hover_popup->hidden)
-      editor->completion.box.render(cursor);
+      this->hover_popup->pos = cursor;
-    else if (editor->hover_active)
+    if (!this->diagnostic_popup->hidden)
-      editor->hover.render(cursor);
+      this->diagnostic_popup->pos = cursor;
-    else if (editor->diagnostics_active)
-      editor->diagnostics.render(cursor);
   }
   free(it->buffer);
   free(it);
-  if (editor->parser)
+  if (this->parser)
-    editor->parser->scroll(line_index + 5);
+    this->parser->scroll(line_index + 5);
 }

src/editor/scroll.cc

@@ -1,13 +1,13 @@
 #include "editor/editor.h"
 
-void scroll_up(Editor *editor, int32_t number) {
+void Editor::scroll_up(uint32_t number) {
-  if (!editor || number == 0)
+  if (number == 0)
     return;
   uint32_t numlen =
-      EXTRA_META + static_cast<int>(std::log10(editor->root->line_count + 1));
+      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
-  uint32_t render_width = editor->size.col - numlen;
+  uint32_t render_width = this->size.col - numlen;
-  uint32_t line_index = editor->scroll.row;
+  uint32_t line_index = this->scroll.row;
-  LineIterator *it = begin_l_iter(editor->root, line_index);
+  LineIterator *it = begin_l_iter(this->root, line_index);
   if (!it)
     return;
   uint32_t len;
@@ -23,10 +23,9 @@ void scroll_up(Editor *editor, int32_t number) {
   uint32_t col = 0;
   std::vector<uint32_t> segment_starts;
   segment_starts.reserve(16);
-  if (current_byte_offset < editor->scroll.col)
+  if (current_byte_offset < this->scroll.col)
     segment_starts.push_back(0);
-  while (current_byte_offset < editor->scroll.col &&
+  while (current_byte_offset < this->scroll.col && current_byte_offset < len) {
-         current_byte_offset < len) {
     uint32_t cluster_len = grapheme_next_character_break_utf8(
         line + current_byte_offset, len - current_byte_offset);
     int width = display_width(line + current_byte_offset, cluster_len);
@@ -40,7 +39,7 @@ void scroll_up(Editor *editor, int32_t number) {
   for (auto it_seg = segment_starts.rbegin(); it_seg != segment_starts.rend();
        ++it_seg) {
     if (--number == 0) {
-      editor->scroll = {line_index, *it_seg};
+      this->scroll = {line_index, *it_seg};
       free(it->buffer);
       free(it);
       return;
@@ -48,7 +47,7 @@ void scroll_up(Editor *editor, int32_t number) {
   }
   line = prev_line(it, &len);
   if (!line) {
-    editor->scroll = {0, 0};
+    this->scroll = {0, 0};
     free(it->buffer);
     free(it);
     return;
@@ -57,7 +56,7 @@ void scroll_up(Editor *editor, int32_t number) {
     line_index--;
     line = prev_line(it, &len);
     if (!line) {
-      editor->scroll = {0, 0};
+      this->scroll = {0, 0};
       free(it->buffer);
       free(it);
       return;
@@ -83,7 +82,7 @@ void scroll_up(Editor *editor, int32_t number) {
     for (auto it_seg = segment_starts.rbegin(); it_seg != segment_starts.rend();
          ++it_seg) {
       if (--number == 0) {
-        editor->scroll = {line_index, *it_seg};
+        this->scroll = {line_index, *it_seg};
         free(it->buffer);
         free(it);
         return;
@@ -94,17 +93,17 @@ void scroll_up(Editor *editor, int32_t number) {
   free(it);
 }
 
-void scroll_down(Editor *editor, uint32_t number) {
+void Editor::scroll_down(uint32_t number) {
-  if (!editor || number == 0)
+  if (number == 0)
     return;
   uint32_t numlen =
-      EXTRA_META + static_cast<int>(std::log10(editor->root->line_count + 1));
+      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
-  uint32_t render_width = editor->size.col - numlen;
+  uint32_t render_width = this->size.col - numlen;
-  uint32_t line_index = editor->scroll.row;
+  uint32_t line_index = this->scroll.row;
-  LineIterator *it = begin_l_iter(editor->root, line_index);
+  LineIterator *it = begin_l_iter(this->root, line_index);
   if (!it)
     return;
-  const uint32_t max_visual_lines = editor->size.row;
+  const uint32_t max_visual_lines = this->size.row;
   Coord *scroll_queue = (Coord *)malloc(sizeof(Coord) * max_visual_lines);
   uint32_t q_head = 0;
   uint32_t q_size = 0;
@@ -119,7 +118,7 @@ void scroll_down(Editor *editor, uint32_t number) {
       line_len--;
     uint32_t current_byte_offset = 0;
     if (first_visual_line) {
-      current_byte_offset += editor->scroll.col;
+      current_byte_offset += this->scroll.col;
       first_visual_line = false;
     }
     while (current_byte_offset < line_len ||
@@ -134,7 +133,7 @@ void scroll_down(Editor *editor, uint32_t number) {
       }
       visual_seen++;
       if (visual_seen >= number + max_visual_lines) {
-        editor->scroll = scroll_queue[q_head];
+        this->scroll = scroll_queue[q_head];
         free(scroll_queue);
         free(it->buffer);
         free(it);
@@ -162,7 +161,7 @@ void scroll_down(Editor *editor, uint32_t number) {
   }
   if (q_size > 0) {
     uint32_t advance = (q_size > number) ? number : (q_size - 1);
-    editor->scroll = scroll_queue[(q_head + advance) % max_visual_lines];
+    this->scroll = scroll_queue[(q_head + advance) % max_visual_lines];
   }
   free(it->buffer);
   free(it);

src/editor/selection.cc

@@ -1,47 +1,46 @@
 #include "editor/editor.h"
 #include "utils/utils.h"
 
-void selection_bounds(Editor *editor, Coord *out_start, Coord *out_end) {
+void Editor::selection_bounds(Coord *out_start, Coord *out_end) {
-  std::shared_lock lock(editor->knot_mtx);
   Coord start, end;
-  if (editor->cursor >= editor->selection) {
+  if (this->cursor >= this->selection) {
     uint32_t prev_col;
-    switch (editor->selection_type) {
+    switch (this->selection_type) {
     case CHAR:
-      start = editor->selection;
+      start = this->selection;
-      end = move_right(editor, editor->cursor, 1);
+      end = this->move_right(this->cursor, 1);
       break;
     case WORD:
-      word_boundaries(editor, editor->selection, &prev_col, nullptr, nullptr,
+      this->word_boundaries(this->selection, &prev_col, nullptr, nullptr,
-                      nullptr);
+                            nullptr);
-      start = {editor->selection.row, prev_col};
+      start = {this->selection.row, prev_col};
-      end = editor->cursor;
+      end = this->cursor;
       break;
     case LINE:
-      start = {editor->selection.row, 0};
+      start = {this->selection.row, 0};
-      end = editor->cursor;
+      end = this->cursor;
       break;
     }
   } else {
-    start = editor->cursor;
+    start = this->cursor;
     uint32_t next_col, line_len;
-    switch (editor->selection_type) {
+    switch (this->selection_type) {
     case CHAR:
-      end = move_right(editor, editor->selection, 1);
+      end = this->move_right(this->selection, 1);
       break;
     case WORD:
-      word_boundaries(editor, editor->selection, nullptr, &next_col, nullptr,
+      this->word_boundaries(this->selection, nullptr, &next_col, nullptr,
-                      nullptr);
+                            nullptr);
-      end = {editor->selection.row, next_col};
+      end = {this->selection.row, next_col};
       break;
     case LINE:
-      LineIterator *it = begin_l_iter(editor->root, editor->selection.row);
+      LineIterator *it = begin_l_iter(this->root, this->selection.row);
       char *line = next_line(it, &line_len);
       if (!line)
         return;
       if (line_len > 0 && line[line_len - 1] == '\n')
         line_len--;
-      end = {editor->selection.row, line_len};
+      end = {this->selection.row, line_len};
       free(it->buffer);
       free(it);
       break;
@@ -53,47 +52,46 @@ void selection_bounds(Editor *editor, Coord *out_start, Coord *out_end) {
     *out_end = end;
 }
 
-char *get_selection(Editor *editor, uint32_t *out_len, Coord *out_start) {
+char *Editor::get_selection(uint32_t *out_len, Coord *out_start) {
-  std::shared_lock lock(editor->knot_mtx);
   Coord start, end;
-  if (editor->cursor >= editor->selection) {
+  if (this->cursor >= this->selection) {
     uint32_t prev_col;
-    switch (editor->selection_type) {
+    switch (this->selection_type) {
     case CHAR:
-      start = editor->selection;
+      start = this->selection;
-      end = move_right(editor, editor->cursor, 1);
+      end = this->move_right(this->cursor, 1);
       break;
     case WORD:
-      word_boundaries(editor, editor->selection, &prev_col, nullptr, nullptr,
+      this->word_boundaries(this->selection, &prev_col, nullptr, nullptr,
-                      nullptr);
+                            nullptr);
-      start = {editor->selection.row, prev_col};
+      start = {this->selection.row, prev_col};
-      end = editor->cursor;
+      end = this->cursor;
       break;
     case LINE:
-      start = {editor->selection.row, 0};
+      start = {this->selection.row, 0};
-      end = editor->cursor;
+      end = this->cursor;
       break;
     }
   } else {
-    start = editor->cursor;
+    start = this->cursor;
     uint32_t next_col, line_len;
-    switch (editor->selection_type) {
+    switch (this->selection_type) {
     case CHAR:
-      end = move_right(editor, editor->selection, 1);
+      end = this->move_right(this->selection, 1);
       break;
     case WORD:
-      word_boundaries(editor, editor->selection, nullptr, &next_col, nullptr,
+      this->word_boundaries(this->selection, nullptr, &next_col, nullptr,
-                      nullptr);
+                            nullptr);
-      end = {editor->selection.row, next_col};
+      end = {this->selection.row, next_col};
       break;
     case LINE:
-      LineIterator *it = begin_l_iter(editor->root, editor->selection.row);
+      LineIterator *it = begin_l_iter(this->root, this->selection.row);
       char *line = next_line(it, &line_len);
       if (!line)
         return nullptr;
       if (line_len > 0 && line[line_len - 1] == '\n')
         line_len--;
-      end = {editor->selection.row, line_len};
+      end = {this->selection.row, line_len};
       free(it->buffer);
       free(it);
       break;
@@ -102,9 +100,9 @@ char *get_selection(Editor *editor, uint32_t *out_len, Coord *out_start) {
   if (out_start)
     *out_start = start;
   uint32_t start_byte =
-      line_to_byte(editor->root, start.row, nullptr) + start.col;
+      line_to_byte(this->root, start.row, nullptr) + start.col;
-  uint32_t end_byte = line_to_byte(editor->root, end.row, nullptr) + end.col;
+  uint32_t end_byte = line_to_byte(this->root, end.row, nullptr) + end.col;
-  char *text = read(editor->root, start_byte, end_byte - start_byte);
+  char *text = read(this->root, start_byte, end_byte - start_byte);
   if (out_len)
     *out_len = end_byte - start_byte;
   return text;

src/editor/worker.cc

@@ -1,7 +1,6 @@
 #include "editor/editor.h"
 
 void hover_diagnostic(Editor *editor) {
-  std::shared_lock lock(editor->v_mtx);
   static uint32_t last_line = UINT32_MAX;
   if (last_line == editor->cursor.row && !editor->warnings_dirty)
     return;
@@ -15,23 +14,22 @@ void hover_diagnostic(Editor *editor) {
       std::upper_bound(editor->warnings.begin(), editor->warnings.end(), dummy);
   std::vector<VWarn> warnings_at_line(first, last);
   if (warnings_at_line.size() == 0) {
-    editor->diagnostics_active = false;
+    editor->diagnostic_popup->hidden = true;
     return;
   }
-  editor->diagnostics.clear();
+  editor->diagnostic_popup->clear();
-  editor->diagnostics.warnings.swap(warnings_at_line);
+  editor->diagnostic_popup->warnings.swap(warnings_at_line);
-  editor->diagnostics.render_first();
+  editor->diagnostic_popup->hidden = false;
-  editor->diagnostics_active = true;
 }
 
-void editor_worker(Editor *editor) {
+void Editor::work() {
-  if (!editor || !editor->root)
+  if (!this->root)
     return;
-  if (editor->parser)
+  if (this->parser)
-    editor->parser->work();
+    this->parser->work();
-  hover_diagnostic(editor);
+  hover_diagnostic(this);
-  if (editor->completion.active && editor->completion.hover_dirty) {
+  // if (this->completion.active && this->completion.hover_dirty) {
-    editor->completion.hover.render_first();
+  //   this->completion.hover.render_first();
-    editor->completion.hover_dirty = false;
+  //   this->completion.hover_dirty = false;
-  }
+  // }
 }

src/extentions/diagnostics.cc

@@ -1,12 +1,33 @@
-#include "ui/diagnostics.h"
+#include "extentions/diagnostics.h"
 
-void DiagnosticBox::clear() {
+DiagnosticBox *init_diagnostic() {
-  warnings.clear();
+  auto diagnostic = std::make_unique<DiagnosticBox>();
-  cells.clear();
+  diagnostic->pos = {0, 0};
-  size = {0, 0};
+  diagnostic->size = {1, 1};
-};
+  diagnostic->hidden = true;
+  DiagnosticBox *ptr = diagnostic.get();
+  layout::popups.push_back(std::move(diagnostic));
+  return ptr;
+}
 
-void DiagnosticBox::render_first() {
+// TODO: Make this code more readable, It works fine tho.
+
+void DiagnosticBox::render(std::vector<ScreenCell> &buffer, Coord n_size,
+                           Coord n_pos) {
+  pos = n_pos;
+  size = n_size;
+  int32_t start_row = (int32_t)pos.row - (int32_t)size.row;
+  if (start_row < 0)
+    start_row = pos.row + 1;
+  int32_t start_col = pos.col;
+  Coord screen_size = {io::rows, io::cols};
+  if (start_col + size.col > screen_size.col) {
+    start_col = screen_size.col - size.col;
+    if (start_col < 0)
+      start_col = 0;
+  }
+  pos.col = start_col;
+  pos.row = start_row;
   if (warnings.empty())
     return;
   uint32_t longest_line = 8 + warnings[0].source.length();
@@ -30,22 +51,35 @@ void DiagnosticBox::render_first() {
   }
   uint32_t content_width = MIN(longest_line, 150u);
   size.col = content_width + 2;
-  cells.assign(size.col * 25, {" ", 0, 0, 0, 0, 0});
+  auto set = [&](uint32_t r, uint32_t c, std::string text, uint32_t fg,
-  auto set = [&](uint32_t r, uint32_t c, const char *text, uint32_t fg,
+                 uint32_t bg, uint8_t flags, uint32_t width) {
-                 uint32_t bg, uint8_t flags) {
+    if (r < 0 || r >= size.row || c < 0 || c >= size.col)
-    cells[r * size.col + c] = {std::string(text), 0, fg, bg, flags, 0};
+      return;
+    r += pos.row;
+    c += pos.col;
+    if (r < 0 || r >= screen_size.row || c < 0 || c >= screen_size.col)
+      return;
+    ScreenCell &cell = buffer[r * screen_size.col + c];
+    cell.utf8 = std::move(text);
+    cell.width = width;
+    cell.fg = fg;
+    cell.bg = bg;
+    cell.flags = flags;
+    cell.ul_color = 0;
   };
   uint32_t base_bg = 0;
   uint32_t border_fg = 0x82AAFF;
   uint32_t r = 0;
   if (warnings[0].source != "") {
     std::string src_txt = "Source: ";
-    for (uint32_t i = 0; i < src_txt.length() && i < content_width; i++)
+    uint32_t i = 0;
-      set(1, i + 1, (char[2]){src_txt[i], 0}, 0x3EAAFF, base_bg, 0);
+    for (; i < 8 && i < content_width; i++)
-    for (uint32_t i = 0; i < warnings[0].source.length() && i < content_width;
+      set(1, i + 1, (char[2]){src_txt[i], 0}, 0x3EAAFF, base_bg, 0, 1);
-         i++)
+    for (; i < 8 + warnings[0].source.length() && i < content_width; i++)
-      set(1, i + 1 + src_txt.length(), (char[2]){warnings[0].source[i], 0},
+      set(1, i + 1, (char[2]){warnings[0].source[i - 8], 0}, 0xffffff, base_bg,
-          0xffffff, base_bg, 0);
+          0, 1);
+    while (i < content_width)
+      set(1, ++i, " ", 0xffffff, base_bg, 0, 1);
     r++;
   }
   int idx = 1;
@@ -54,7 +88,7 @@ void DiagnosticBox::render_first() {
     std::snprintf(buf, sizeof(buf), "%2d", idx % 100);
     std::string line_txt = std::string(buf) + ". ";
     for (uint32_t i = 0; i < line_txt.length(); i++)
-      set(r + 1, i + 1, (char[2]){line_txt[i], 0}, 0xffffff, base_bg, 0);
+      set(r + 1, i + 1, (char[2]){line_txt[i], 0}, 0xffffff, base_bg, 0, 1);
     if (r >= 23)
       break;
     const char *err_sym = "";
@@ -93,19 +127,26 @@ void DiagnosticBox::render_first() {
         int width = display_width(cluster.c_str(), cluster_len);
         if (c + width > content_width)
           break;
-        set(r + 1, c + 1, cluster.c_str(), c_sym, base_bg, 0);
+        set(r + 1, c + 1, cluster.c_str(), c_sym, base_bg, 0, width);
         c += width;
         i += cluster_len;
         for (int w = 1; w < width; w++)
-          set(r + 1, c - w + 1, "\x1b", c_sym, base_bg, 0);
+          set(r + 1, c - w + 1, "\x1b", c_sym, base_bg, 0, 0);
       }
+      while (c < content_width)
+        set(r + 1, ++c, " ", 0xffffff, base_bg, 0, 1);
       r++;
     }
     if (r >= 23)
       break;
     if (warn.code != "") {
-      for (uint32_t i = 0; i < warn.code.length() && i + 5 < content_width; i++)
+      uint32_t i = 0;
-        set(r + 1, i + 5, (char[2]){warn.code[i], 0}, 0x81cdc6, base_bg, 0);
+      for (; i < 5 && i < content_width; i++)
+        set(r + 1, i, " ", 0x81cdc6, base_bg, 0, 1);
+      for (; i < warn.code.length() + 5 && i < content_width; i++)
+        set(r + 1, i, (char[2]){warn.code[i - 5], 0}, 0x81cdc6, base_bg, 0, 1);
+      while (i <= content_width)
+        set(r + 1, i++, " ", 0x81cdc6, base_bg, 0, 1);
       r++;
     }
     if (r >= 23)
@@ -113,14 +154,18 @@ void DiagnosticBox::render_first() {
     for (std::string &see_also : warn.see_also) {
       uint32_t fg = 0xB55EFF;
       uint8_t colon_count = 0;
-      for (uint32_t i = 0; i < see_also.length() && i + 5 < content_width;
+      uint32_t i = 0;
-           i++) {
+      for (; i < 5 && i < content_width; i++)
-        set(r + 1, i + 5, (char[2]){see_also[i], 0}, fg, base_bg, 0);
+        set(r + 1, i, " ", 0x81cdc6, base_bg, 0, 1);
-        if (see_also[i] == ':')
+      for (; i < see_also.length() + 5 && i < content_width; i++) {
+        set(r + 1, i, (char[2]){see_also[i - 5], 0}, fg, base_bg, 0, 1);
+        if (see_also[i - 5] == ':')
           colon_count++;
         if (colon_count == 2)
           fg = 0xFFFFFF;
       }
+      while (i <= content_width)
+        set(r + 1, i++, " ", fg, base_bg, 0, 1);
       r++;
       if (r >= 23)
         break;
@@ -128,35 +173,16 @@ void DiagnosticBox::render_first() {
     idx++;
   }
   size.row = 2 + r;
-  set(0, 0, "┌", border_fg, base_bg, 0);
+  set(0, 0, "┌", border_fg, base_bg, 0, 1);
   for (uint32_t i = 1; i < size.col - 1; i++)
-    set(0, i, "─", border_fg, base_bg, 0);
+    set(0, i, "─", border_fg, base_bg, 0, 1);
-  set(0, size.col - 1, "┐", border_fg, base_bg, 0);
+  set(0, size.col - 1, "┐", border_fg, base_bg, 0, 1);
   for (uint32_t r = 1; r < size.row - 1; r++) {
-    set(r, 0, "│", border_fg, base_bg, 0);
+    set(r, 0, "│", border_fg, base_bg, 0, 1);
-    set(r, size.col - 1, "│", border_fg, base_bg, 0);
+    set(r, size.col - 1, "│", border_fg, base_bg, 0, 1);
   }
-  set(size.row - 1, 0, "└", border_fg, base_bg, 0);
+  set(size.row - 1, 0, "└", border_fg, base_bg, 0, 1);
   for (uint32_t i = 1; i < size.col - 1; i++)
-    set(size.row - 1, i, "─", border_fg, base_bg, 0);
+    set(size.row - 1, i, "─", border_fg, base_bg, 0, 1);
-  set(size.row - 1, size.col - 1, "┘", border_fg, base_bg, 0);
+  set(size.row - 1, size.col - 1, "┘", border_fg, base_bg, 0, 1);
-  cells.resize(size.col * size.row);
-}
-
-void DiagnosticBox::render(Coord pos) {
-  int32_t start_row = (int32_t)pos.row - (int32_t)size.row;
-  if (start_row < 0)
-    start_row = pos.row + 1;
-  int32_t start_col = pos.col;
-  Coord screen_size = get_size();
-  if (start_col + size.col > screen_size.col) {
-    start_col = screen_size.col - size.col;
-    if (start_col < 0)
-      start_col = 0;
-  }
-  for (uint32_t r = 0; r < size.row; r++)
-    for (uint32_t c = 0; c < size.col; c++)
-      update(start_row + r, start_col + c, cells[r * size.col + c].utf8,
-             cells[r * size.col + c].fg, cells[r * size.col + c].bg,
-             cells[r * size.col + c].flags);
 }

src/extentions/hover.cc

@@ -1,12 +1,16 @@
-#include "ui/hover.h"
+#include "extentions/hover.h"
+#include "io/sysio.h"
 #include "syntax/decl.h"
+#include "windows/decl.h"
 
-void HoverBox::clear() {
+HoverBox *init_hover() {
-  text = "";
+  auto hover = std::make_unique<HoverBox>();
-  scroll_ = 0;
+  hover->pos = {0, 0};
-  is_markup = false;
+  hover->size = {1, 1};
-  size = {0, 0};
+  hover->hidden = true;
-  cells.clear();
+  HoverBox *ptr = hover.get();
+  layout::popups.push_back(std::move(hover));
+  return ptr;
 }
 
 void HoverBox::scroll(int32_t number) {
@@ -19,13 +23,28 @@ void HoverBox::scroll(int32_t number) {
   scroll_ = MAX((int32_t)scroll_ + number, 0);
   if (scroll_ > line_count)
     scroll_ = line_count;
-  render_first(true);
+  scroll_dirty = true;
 }
 
-void HoverBox::render_first(bool scroll) {
+void HoverBox::render(std::vector<ScreenCell> &buffer, Coord n_size,
-  if (!scroll) {
+                      Coord n_pos) {
+  pos = n_pos;
+  size = n_size;
+  if (scroll_dirty) {
     // TODO: call syntax highlighter here
   }
+  int32_t start_row = (int32_t)pos.row - (int32_t)size.row;
+  if (start_row < 0)
+    start_row = pos.row + 1;
+  int32_t start_col = pos.col;
+  Coord screen_size = {io::rows, io::cols};
+  if (start_col + size.col > screen_size.col) {
+    start_col = screen_size.col - size.col;
+    if (start_col < 0)
+      start_col = 0;
+  }
+  pos.col = start_col;
+  pos.row = start_row;
   uint32_t longest_line = 0;
   uint32_t current_width = 0;
   for (size_t j = 0; j < text.length(); j++) {
@@ -36,7 +55,7 @@ void HoverBox::render_first(bool scroll) {
       current_width += 1;
     }
   }
-  // HACK: the 1 is added so the longest line doesnt wrap which should be fixed
+  // HACK: the 1 is added so the longest line doesnt wrap which should befixed
   //       in the loop instead as it was never meant to wrap in the first place
   longest_line = MAX(longest_line, current_width) + 1;
   uint32_t content_width = MIN(longest_line, 130u);
@@ -50,10 +69,21 @@ void HoverBox::render_first(bool scroll) {
   }
   uint32_t border_fg = 0x82AAFF;
   uint32_t base_bg = 0;
-  cells.assign(size.col * 26, ScreenCell{" ", 0, 0, 0, 0, 0});
   auto set = [&](uint32_t r, uint32_t c, const char *text, uint32_t fg,
-                 uint32_t bg, uint8_t flags) {
+                 uint32_t bg, uint8_t flags, uint32_t width) {
-    cells[r * size.col + c] = {std::string(text), 0, fg, bg, flags, 0};
+    if (r < 0 || r >= size.row || c < 0 || c >= size.col)
+      return;
+    r += pos.row;
+    c += pos.col;
+    if (r < 0 || r >= screen_size.row || c < 0 || c >= screen_size.col)
+      return;
+    ScreenCell &cell = buffer[r * screen_size.col + c];
+    cell.utf8 = text;
+    cell.width = width;
+    cell.fg = fg;
+    cell.bg = bg;
+    cell.flags = flags;
+    cell.ul_color = 0;
   };
   uint32_t r = 0;
   while (i < text.length() && r < 24) {
@@ -75,45 +105,29 @@ void HoverBox::render_first(bool scroll) {
       uint32_t fg = hl ? hl->fg : 0xFFFFFF;
       uint32_t bg = hl ? hl->bg : 0;
       uint32_t flags = hl ? hl->flags : 0;
-      set(r + 1, c + 1, cluster.c_str(), fg, bg | base_bg, flags);
+      set(r + 1, c + 1, cluster.c_str(), fg, bg | base_bg, flags, width);
       c += width;
       i += cluster_len;
       for (int w = 1; w < width; w++)
-        set(r + 1, c - w + 1, "\x1b", 0xFFFFFF, base_bg, 0);
+        set(r + 1, c - w + 1, "\x1b", 0xFFFFFF, base_bg, 0, 0);
     }
+    while (c < content_width)
+      set(r + 1, ++c, " ", 0xFFFFFF, base_bg, 0, 0);
     r++;
   }
-  if (!scroll)
+  if (scroll_dirty)
     size.row = r + 2;
-  set(0, 0, "┌", border_fg, base_bg, 0);
+  set(0, 0, "┌", border_fg, base_bg, 0, 1);
   for (uint32_t i = 1; i < size.col - 1; i++)
-    set(0, i, "─", border_fg, base_bg, 0);
+    set(0, i, "─", border_fg, base_bg, 0, 1);
-  set(0, size.col - 1, "┐", border_fg, base_bg, 0);
+  set(0, size.col - 1, "┐", border_fg, base_bg, 0, 1);
   for (uint32_t r = 1; r < size.row - 1; r++) {
-    set(r, 0, "│", border_fg, base_bg, 0);
+    set(r, 0, "│", border_fg, base_bg, 0, 1);
-    set(r, size.col - 1, "│", border_fg, base_bg, 0);
+    set(r, size.col - 1, "│", border_fg, base_bg, 0, 1);
   }
-  set(size.row - 1, 0, "└", border_fg, base_bg, 0);
+  set(size.row - 1, 0, "└", border_fg, base_bg, 0, 1);
   for (uint32_t i = 1; i < size.col - 1; i++)
-    set(size.row - 1, i, "─", border_fg, base_bg, 0);
+    set(size.row - 1, i, "─", border_fg, base_bg, 0, 1);
-  set(size.row - 1, size.col - 1, "┘", border_fg, base_bg, 0);
+  set(size.row - 1, size.col - 1, "┘", border_fg, base_bg, 0, 1);
-  cells.resize(size.col * size.row);
+  scroll_dirty = false;
-}
-
-void HoverBox::render(Coord pos) {
-  int32_t start_row = (int32_t)pos.row - (int32_t)size.row;
-  if (start_row < 0)
-    start_row = pos.row + 1;
-  int32_t start_col = pos.col;
-  Coord screen_size = get_size();
-  if (start_col + size.col > screen_size.col) {
-    start_col = screen_size.col - size.col;
-    if (start_col < 0)
-      start_col = 0;
-  }
-  for (uint32_t r = 0; r < size.row; r++)
-    for (uint32_t c = 0; c < size.col; c++)
-      update(start_row + r, start_col + c, cells[r * size.col + c].utf8,
-             cells[r * size.col + c].fg, cells[r * size.col + c].bg,
-             cells[r * size.col + c].flags);
 }

src/io/renderer.cc

@@ -1,16 +1,19 @@
 #include "io/sysio.h"
 
-static uint32_t rows, cols;
+namespace io {
-static bool show_cursor = 0;
+std::vector<ScreenCell> new_screen;
-static std::vector<ScreenCell> screen;
+uint32_t rows, cols;
-static std::vector<ScreenCell> old_screen;
+bool show_cursor = 0;
-static std::mutex screen_mutex;
+std::vector<ScreenCell> old_screen;
-static termios orig_termios;
+termios orig_termios;
+} // namespace io
+
+using namespace io;
 
 void disable_raw_mode() {
   std::string os = "\x1b[?1049l\x1b[2 q\x1b[?1002l\x1b[?25h\x1b[?2004l";
   write(STDOUT_FILENO, os.c_str(), os.size());
-  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios) == -1) {
+  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &io::orig_termios) == -1) {
     perror("tcsetattr");
     exit(EXIT_FAILURE);
   }
@@ -24,7 +27,7 @@ void enable_raw_mode() {
   raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
   raw.c_oflag &= ~(OPOST);
   raw.c_cflag |= (CS8);
-  raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
+  raw.c_lflag &= ~(ECHO | ICANON | IEXTEN); // | ISIG);
   raw.c_cc[VMIN] = 0;
   raw.c_cc[VTIME] = 0;
   if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
@@ -39,80 +42,14 @@ Coord start_screen() {
   ioctl(0, TIOCGWINSZ, &w);
   rows = w.ws_row;
   cols = w.ws_col;
-  screen.assign(rows * cols, {});
+  new_screen.assign(rows * cols, {});
   old_screen.assign(rows * cols, {});
   return {rows, cols};
 }
 
 void end_screen() { disable_raw_mode(); }
 
-Coord get_size() { return {rows, cols}; }
+void io_render() {
-
-void update(uint32_t row, uint32_t col, std::string utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags) {
-  if (row >= rows || col >= cols)
-    return;
-  uint32_t idx = row * cols + col;
-  std::lock_guard<std::mutex> lock(screen_mutex);
-  screen[idx].utf8 = utf8 != "" ? utf8 : "";
-  if (utf8 == "")
-    return;
-  screen[idx].width = display_width(utf8.c_str(), utf8.size());
-  screen[idx].fg = fg;
-  screen[idx].bg = bg;
-  screen[idx].flags = flags;
-  screen[idx].ul_color = 0;
-}
-
-void update(uint32_t row, uint32_t col, const char *utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags) {
-  if (row >= rows || col >= cols)
-    return;
-  uint32_t idx = row * cols + col;
-  std::lock_guard<std::mutex> lock(screen_mutex);
-  screen[idx].utf8 = utf8 ? utf8 : "";
-  if (utf8 == nullptr)
-    return;
-  screen[idx].width = display_width(utf8, strlen(utf8));
-  screen[idx].fg = fg;
-  screen[idx].bg = bg;
-  screen[idx].flags = flags;
-  screen[idx].ul_color = 0;
-}
-
-void update(uint32_t row, uint32_t col, std::string utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags, uint32_t ul_color) {
-  if (row >= rows || col >= cols)
-    return;
-  uint32_t idx = row * cols + col;
-  std::lock_guard<std::mutex> lock(screen_mutex);
-  screen[idx].utf8 = utf8 != "" ? utf8 : "";
-  if (utf8 == "")
-    return;
-  screen[idx].width = display_width(utf8.c_str(), utf8.size());
-  screen[idx].fg = fg;
-  screen[idx].bg = bg;
-  screen[idx].flags = flags;
-  screen[idx].ul_color = ul_color;
-}
-
-void update(uint32_t row, uint32_t col, const char *utf8, uint32_t fg,
-            uint32_t bg, uint8_t flags, uint32_t ul_color) {
-  if (row >= rows || col >= cols)
-    return;
-  uint32_t idx = row * cols + col;
-  std::lock_guard<std::mutex> lock(screen_mutex);
-  screen[idx].utf8 = utf8 ? utf8 : "";
-  if (utf8 == nullptr)
-    return;
-  screen[idx].width = display_width(utf8, strlen(utf8));
-  screen[idx].fg = fg;
-  screen[idx].bg = bg;
-  screen[idx].flags = flags;
-  screen[idx].ul_color = ul_color;
-}
-
-void render() {
   static bool first_render = true;
   uint32_t current_fg = 0;
   uint32_t current_bg = 0;
@@ -121,7 +58,6 @@ void render() {
   bool current_bold = false;
   bool current_strikethrough = false;
   bool current_underline = false;
-  std::lock_guard<std::mutex> lock(screen_mutex);
   std::string out;
   out.reserve(static_cast<size_t>(rows) * static_cast<size_t>(cols) * 4 + 256);
   out += "\x1b[s\x1b[?25l";
@@ -135,7 +71,7 @@ void render() {
     for (uint32_t col = 0; col < cols; ++col) {
       uint32_t idx = row * cols + col;
       ScreenCell &old_cell = old_screen[idx];
-      ScreenCell &new_cell = screen[idx];
+      ScreenCell &new_cell = new_screen[idx];
       bool content_changed =
           old_cell.utf8 != new_cell.utf8 || old_cell.fg != new_cell.fg ||
           old_cell.bg != new_cell.bg || old_cell.flags != new_cell.flags ||
@@ -147,7 +83,7 @@ void render() {
             for (int64_t back = 1; back <= 4 && first_change_col - back >= 0;
                  ++back) {
               ScreenCell &prev_cell =
-                  screen[row * cols + (first_change_col - back)];
+                  new_screen[row * cols + (first_change_col - back)];
               if (prev_cell.width > 1) {
                 first_change_col -= back;
                 break;
@@ -165,7 +101,7 @@ void render() {
     for (uint32_t col = first_change_col; col <= last_change_col; ++col) {
       uint32_t idx = row * cols + col;
       ScreenCell &old_cell = old_screen[idx];
-      ScreenCell &new_cell = screen[idx];
+      ScreenCell &new_cell = new_screen[idx];
       uint32_t width = new_cell.width > 0 ? new_cell.width : 1;
       bool overlap = false;
       if (width > 1) {
@@ -173,7 +109,7 @@ void render() {
           uint32_t next_col = col + i;
           if (next_col >= cols)
             break;
-          const ScreenCell &next = screen[row * cols + next_col];
+          const ScreenCell &next = new_screen[row * cols + next_col];
           if (!is_empty_cell(next)) {
             overlap = true;
             break;
@@ -244,7 +180,7 @@ void render() {
           uint32_t next_col = col + i;
           if (next_col >= cols)
             break;
-          const ScreenCell &next = screen[row * cols + next_col];
+          const ScreenCell &next = new_screen[row * cols + next_col];
           if (!is_empty_cell(next))
             break;
           out.push_back(' ');
@@ -260,7 +196,7 @@ void render() {
             ScreenCell *cell = &new_cell;
             int back = 0;
             while ((int)col - back >= 0 && cell->utf8[0] == '\x1b')
-              cell = &screen[row * cols + col - ++back];
+              cell = &new_screen[row * cols + col - ++back];
             if (width >= cell->width)
               out.append(" ");
           }

src/lsp/handlers.cc

@@ -1,87 +0,0 @@
-#include "lsp/lsp.h"
-
-Queue<LSPOpenRequest> lsp_open_queue;
-
-void request_add_to_lsp(Language language, Editor *editor) {
-  lsp_open_queue.push({language, editor});
-}
-
-void add_to_lsp(Language language, Editor *editor) {
-  std::shared_ptr<LSPInstance> lsp = get_or_init_lsp(language.lsp_name);
-  if (!lsp)
-    return;
-  std::unique_lock lock(lsp->mtx);
-  if (editor->lsp == lsp)
-    return;
-  lsp->editors.push_back(editor);
-  lsp->open_queue.push({language, editor});
-  lock.unlock();
-}
-
-void open_editor(std::shared_ptr<LSPInstance> lsp,
-                 std::pair<Language, Editor *> entry) {
-  Language language = entry.first;
-  Editor *editor = entry.second;
-  if (editor->lsp == lsp)
-    return;
-  editor->lsp = lsp;
-  std::unique_lock lock3(editor->knot_mtx);
-  char *buf = read(editor->root, 0, editor->root->char_count);
-  std::string text(buf);
-  free(buf);
-  json message = {{"jsonrpc", "2.0"},
-                  {"method", "textDocument/didOpen"},
-                  {"params",
-                   {{"textDocument",
-                     {{"uri", editor->uri},
-                      {"languageId", language.name},
-                      {"version", 1},
-                      {"text", text}}}}}};
-  lock3.unlock();
-  lsp_send(lsp, message, nullptr);
-}
-
-static std::string find_lsp_id(std::shared_ptr<LSPInstance> needle) {
-  for (const auto &[id, lsp] : active_lsps)
-    if (lsp == needle)
-      return id;
-  return "";
-}
-
-void remove_from_lsp(Editor *editor) {
-  auto lsp = editor->lsp;
-  if (!lsp)
-    return;
-  std::unique_lock lock1(lsp->mtx);
-  lsp->editors.erase(
-      std::remove(lsp->editors.begin(), lsp->editors.end(), editor),
-      lsp->editors.end());
-  lock1.unlock();
-  std::unique_lock lock2(editor->lsp_mtx);
-  editor->lsp = nullptr;
-  lock2.unlock();
-  json message = {{"jsonrpc", "2.0"},
-                  {"method", "textDocument/didClose"},
-                  {"params", {{"textDocument", {{"uri", editor->uri}}}}}};
-  lsp_send(lsp, message, nullptr);
-  std::string lsp_id = find_lsp_id(lsp);
-  if (!lsp_id.empty() && lsp->editors.empty())
-    close_lsp(lsp_id);
-}
-
-void lsp_handle(std::shared_ptr<LSPInstance>, json message) {
-  std::string method = message.value("method", "");
-  if (method == "window/showMessage") {
-    if (message.contains("params")) {
-      auto &p = message["params"];
-      if (p.contains("message"))
-        log("%s\n", p["message"].get<std::string>().c_str());
-    }
-  } else if (method == "window/logMessage") {
-    if (message.contains("params")) {
-      auto &p = message["params"];
-      if (p.contains("message"))
-        log("%s\n", p["message"].get<std::string>().c_str());
-    }
-  }
-}

src/lsp/process.cc

@@ -1,242 +0,0 @@
-#include "lsp/lsp.h"
-
-static bool init_lsp(std::shared_ptr<LSPInstance> lsp) {
-  int in_pipe[2];
-  int out_pipe[2];
-  if (pipe(in_pipe) == -1 || pipe(out_pipe) == -1) {
-    perror("pipe");
-    return false;
-  }
-  pid_t pid = fork();
-  if (pid == -1) {
-    perror("fork");
-    return false;
-  }
-  if (pid == 0) {
-    dup2(in_pipe[0], STDIN_FILENO);
-    dup2(out_pipe[1], STDOUT_FILENO);
-    int devnull = open("/dev/null", O_WRONLY);
-    if (devnull >= 0) {
-      dup2(devnull, STDERR_FILENO);
-      close(devnull);
-    }
-    close(in_pipe[0]);
-    close(in_pipe[1]);
-    close(out_pipe[0]);
-    close(out_pipe[1]);
-    std::vector<char *> argv;
-    argv.push_back(const_cast<char *>(lsp->lsp->command.c_str()));
-    for (auto &arg : lsp->lsp->args)
-      argv.push_back(const_cast<char *>(arg.c_str()));
-    argv.push_back(nullptr);
-    execvp(lsp->lsp->command.c_str(), argv.data());
-    perror("execvp");
-    _exit(127);
-  }
-  lsp->pid = pid;
-  lsp->stdin_fd = in_pipe[1];
-  lsp->stdout_fd = out_pipe[0];
-  close(in_pipe[0]);
-  close(out_pipe[1]);
-  return true;
-}
-
-std::shared_ptr<LSPInstance> get_or_init_lsp(std::string lsp_id) {
-  std::unique_lock lock(active_lsps_mtx);
-  auto it = active_lsps.find(lsp_id);
-  if (it == active_lsps.end()) {
-    auto map_it = lsps.find(lsp_id);
-    if (map_it == lsps.end())
-      return nullptr;
-    std::shared_ptr<LSPInstance> lsp = std::make_shared<LSPInstance>();
-    lsp->lsp = &map_it->second;
-    if (!init_lsp(lsp))
-      return nullptr;
-    LSPPending *pending = new LSPPending();
-    pending->editor = nullptr;
-    pending->callback = [lsp, lsp_id](Editor *, const json &msg) {
-      if (msg.contains("result") && msg["result"].contains("capabilities")) {
-        auto &caps = msg["result"]["capabilities"];
-        // if (caps.contains("positionEncoding")) {
-        //   std::string s = caps["positionEncoding"].get<std::string>();
-        //   if (s == "utf-8")
-        //     lsp->is_utf8 = true;
-        //   log("Lsp name: %s, supports: %s", lsp->lsp->command.c_str(),
-        //       s.c_str());
-        // }
-        if (caps.contains("textDocumentSync")) {
-          auto &sync = caps["textDocumentSync"];
-          if (sync.is_number()) {
-            int change_type = sync.get<int>();
-            lsp->incremental_sync = (change_type == 2);
-          } else if (sync.is_object() && sync.contains("change")) {
-            int change_type = sync["change"].get<int>();
-            lsp->incremental_sync = (change_type == 2);
-          }
-        }
-        lsp->allow_formatting = caps.value("documentFormattingProvider", false);
-        if (lsp_id != "lua-language-server" /* Lua ls gives terrible ontype
-                                               formatting so disable */
-            && caps.contains("documentOnTypeFormattingProvider")) {
-          auto &fmt = caps["documentOnTypeFormattingProvider"];
-          if (fmt.is_object()) {
-            if (fmt.contains("firstTriggerCharacter")) {
-              std::string s = fmt["firstTriggerCharacter"].get<std::string>();
-              if (s.size() == 1)
-                lsp->format_chars.push_back(s[0]);
-            }
-            if (fmt.contains("moreTriggerCharacter")) {
-              for (auto &c : fmt["moreTriggerCharacter"]) {
-                std::string s = c.get<std::string>();
-                if (s.size() == 1)
-                  lsp->format_chars.push_back(s[0]);
-              }
-            }
-            lsp->allow_formatting_on_type = true;
-          } else if (fmt.is_boolean()) {
-            lsp->allow_formatting_on_type = fmt.get<bool>();
-          }
-        }
-        if (caps.contains("hoverProvider")) {
-          auto &hover = caps["hoverProvider"];
-          lsp->allow_hover =
-              hover.is_boolean() ? hover.get<bool>() : hover.is_object();
-        } else {
-          lsp->allow_hover = false;
-        }
-        if (caps.contains("completionProvider")) {
-          lsp->allow_completion = true;
-          if (caps["completionProvider"].contains("resolveProvider"))
-            lsp->allow_resolve =
-                caps["completionProvider"]["resolveProvider"].get<bool>();
-          if (caps["completionProvider"].contains("triggerCharacters")) {
-            auto &chars = caps["completionProvider"]["triggerCharacters"];
-            if (chars.is_array()) {
-              for (auto &c : chars) {
-                std::string str = c.get<std::string>();
-                if (str.size() != 1)
-                  continue;
-                lsp->trigger_chars.push_back(str[0]);
-              }
-            }
-          }
-          if (caps["completionProvider"].contains("allCommitCharacters")) {
-            auto &chars = caps["completionProvider"]["allCommitCharacters"];
-            if (chars.is_array()) {
-              for (auto &c : chars) {
-                std::string str = c.get<std::string>();
-                if (str.size() != 1)
-                  continue;
-                lsp->end_chars.push_back(str[0]);
-              }
-            }
-          }
-        }
-      }
-      lsp->initialized = true;
-      json initialized = {{"jsonrpc", "2.0"},
-                          {"method", "initialized"},
-                          {"params", json::object()}};
-      lsp_send(lsp, initialized, nullptr);
-    };
-    json init_message = {
-        {"jsonrpc", "2.0"},
-        {"method", "initialize"},
-        {"params",
-         {{"processId", getpid()},
-          {"rootUri", "file://" + percent_encode(path_abs("."))},
-          {"capabilities", client_capabilities}}}};
-    lsp_send(lsp, init_message, pending);
-    active_lsps[lsp_id] = lsp;
-    return lsp;
-  }
-  return it->second;
-}
-
-void close_lsp(std::string lsp_id) {
-  std::shared_ptr<LSPInstance> lsp;
-  {
-    std::shared_lock lock(active_lsps_mtx);
-    auto it = active_lsps.find(lsp_id);
-    if (it == active_lsps.end())
-      return;
-    lsp = it->second;
-  }
-  if (!lsp || lsp->pid == -1 || lsp->exited)
-    return;
-  lsp->exited = true;
-  lsp->initialized = false;
-  auto send_raw = [&](const json &msg) {
-    std::string payload = msg.dump();
-    std::string header =
-        "Content-Length: " + std::to_string(payload.size()) + "\r\n\r\n";
-    std::string out = header + payload;
-    const char *ptr = out.data();
-    size_t remaining = out.size();
-    while (remaining > 0) {
-      ssize_t n = write(lsp->stdin_fd, ptr, remaining);
-      if (n <= 0) {
-        if (errno == EINTR)
-          continue;
-        break;
-      }
-      ptr += n;
-      remaining -= n;
-    }
-  };
-  json shutdown = {{"jsonrpc", "2.0"}, {"id", 1}, {"method", "shutdown"}};
-  send_raw(shutdown);
-  {
-    pollfd pfd{lsp->stdout_fd, POLLIN, 0};
-    int timeout_ms = 300;
-    if (poll(&pfd, 1, timeout_ms) > 0) {
-      auto msg = read_lsp_message(lsp->stdout_fd);
-      (void)msg;
-    }
-  }
-  json exit_msg = {{"jsonrpc", "2.0"}, {"method", "exit"}};
-  send_raw(exit_msg);
-  const int max_wait_ms = 500;
-  int waited = 0;
-  while (waited < max_wait_ms) {
-    int status;
-    pid_t res = waitpid(lsp->pid, &status, WNOHANG);
-    if (res == lsp->pid)
-      break;
-    std::this_thread::sleep_for(std::chrono::milliseconds(10));
-    waited += 10;
-  }
-  if (kill(lsp->pid, 0) == 0) {
-    kill(lsp->pid, SIGKILL);
-    waitpid(lsp->pid, nullptr, 0);
-  }
-  close(lsp->stdin_fd);
-  close(lsp->stdout_fd);
-  {
-    std::unique_lock lock(lsp->mtx);
-    for (auto &kv : lsp->pending)
-      delete kv.second;
-    lsp->pending.clear();
-  }
-  for (auto &editor : lsp->editors) {
-    std::unique_lock editor_lock(editor->lsp_mtx);
-    editor->lsp = nullptr;
-  }
-  {
-    std::unique_lock lock(active_lsps_mtx);
-    active_lsps.erase(lsp_id);
-  }
-}
-
-void clean_lsp(std::shared_ptr<LSPInstance> lsp, std::string lsp_id) {
-  for (auto &kv : lsp->pending)
-    delete kv.second;
-  lsp->pid = -1;
-  close(lsp->stdin_fd);
-  close(lsp->stdout_fd);
-  for (auto &editor : lsp->editors) {
-    std::unique_lock editor_lock(editor->lsp_mtx);
-    editor->lsp = nullptr;
-  }
-  active_lsps.erase(lsp_id);
-}

src/lsp/worker.cc

@@ -0,0 +1,49 @@
+#include "lsp/lsp.h"
+
+namespace lsp {
+std::mutex lsp_mutex;
+std::unordered_map<std::string, std::unique_ptr<LSPInstance>> active_lsps;
+std::unordered_set<std::string> opened;
+Queue<std::string> need_opening;
+std::vector<Editor *> new_editors;
+Queue<std::unique_ptr<LSPMessage>> response_queue;
+}
+
+void lsp_worker() {
+  std::lock_guard lock(lsp::lsp_mutex);
+  while (!lsp::need_opening.empty()) {
+    auto lsp_id = *lsp::need_opening.front();
+    if (!lsp::opened.contains(lsp_id)) {
+      lsp::active_lsps[lsp_id] = std::make_unique<LSPInstance>(lsp_id);
+      lsp::opened.insert(lsp_id);
+    }
+    lsp::need_opening.pop();
+  }
+  for (auto it = lsp::new_editors.begin(); it != lsp::new_editors.end();) {
+    auto ed = *it;
+    auto lsp_id = ed->lang.lsp_name;
+    if (lsp_id.empty()) {
+      it = lsp::new_editors.erase(it);
+      continue;
+    }
+    if (lsp::opened.contains(lsp_id)) {
+      auto a_it = lsp::active_lsps.find(lsp_id);
+      if (a_it != lsp::active_lsps.end())
+        a_it->second->add(ed);
+      it = lsp::new_editors.erase(it);
+    } else {
+      lsp::need_opening.push(lsp_id);
+      it++;
+    }
+  }
+  for (auto it = lsp::active_lsps.begin(); it != lsp::active_lsps.end();) {
+    auto &lsp_inst = it->second;
+    if (!lsp_inst || lsp_inst->pid == -1 || lsp_inst->editors.empty() ||
+        lsp_inst->exited) {
+      it = lsp::active_lsps.erase(it);
+      continue;
+    }
+    lsp_inst->work();
+    ++it;
+  }
+}

src/lsp/workers.cc

@@ -1,170 +0,0 @@
-#include "lsp/lsp.h"
-
-std::shared_mutex active_lsps_mtx;
-std::unordered_map<std::string, std::shared_ptr<LSPInstance>> active_lsps;
-
-void lsp_send(std::shared_ptr<LSPInstance> lsp, json message,
-              LSPPending *pending) {
-  if (!lsp || lsp->stdin_fd == -1)
-    return;
-  std::unique_lock lock(lsp->mtx);
-  if (pending) {
-    message["id"] = lsp->last_id++;
-    uint32_t id = message["id"].get<uint32_t>();
-    lsp->pending[id] = pending;
-  }
-  lsp->outbox.push(message);
-}
-
-std::optional<json> read_lsp_message(int fd) {
-  std::string header;
-  char c;
-  while (true) {
-    ssize_t n = read(fd, &c, 1);
-    if (n <= 0)
-      return std::nullopt;
-    header.push_back(c);
-    if (header.size() >= 4 && header.substr(header.size() - 4) == "\r\n\r\n")
-      break;
-  }
-  size_t pos = header.find("Content-Length:");
-  if (pos == std::string::npos)
-    return std::nullopt;
-  pos += strlen("Content-Length:");
-  while (pos < header.size() && std::isspace(header[pos]))
-    pos++;
-  size_t end = pos;
-  while (end < header.size() && std::isdigit(header[end]))
-    end++;
-  size_t len = std::stoul(header.substr(pos, end - pos));
-  std::string body(len, '\0');
-  size_t got = 0;
-  while (got < len) {
-    ssize_t n = read(fd, &body[got], len - got);
-    if (n <= 0)
-      return std::nullopt;
-    got += n;
-  }
-  return json::parse(body);
-}
-
-static Editor *editor_for_uri(std::shared_ptr<LSPInstance> lsp,
-                              std::string uri) {
-  if (uri.empty())
-    return nullptr;
-  for (auto &editor : lsp->editors)
-    if (editor->uri == uri)
-      return editor;
-  return nullptr;
-}
-
-void lsp_worker() {
-  LSPOpenRequest request;
-  while (lsp_open_queue.pop(request))
-    add_to_lsp(request.language, request.editor);
-  std::unique_lock active_lsps_lock(active_lsps_mtx);
-  for (auto &kv : active_lsps) {
-    std::shared_ptr<LSPInstance> lsp = kv.second;
-    std::unique_lock lock(lsp->mtx);
-    int status;
-    pid_t res = waitpid(lsp->pid, &status, WNOHANG);
-    if (res == lsp->pid) {
-      clean_lsp(lsp, kv.first);
-      return;
-    }
-    if (lsp->initialized) {
-      std::pair<Language, Editor *> request;
-      while (lsp->open_queue.pop(request)) {
-        lock.unlock();
-        open_editor(lsp, request);
-        lock.lock();
-      }
-    }
-    while (!lsp->outbox.empty()) {
-      json message = lsp->outbox.front();
-      std::string m = message.value("method", "");
-      if (lsp->exited) {
-        if (m != "exit" && m != "shutdown") {
-          lsp->outbox.pop(message);
-          continue;
-        }
-      }
-      if (!lsp->initialized) {
-        if (m != "initialize" && m != "exit" && m != "shutdown")
-          break;
-      }
-      lsp->outbox.pop(message);
-      std::string payload = message.dump();
-      std::string header =
-          "Content-Length: " + std::to_string(payload.size()) + "\r\n\r\n";
-      std::string out = header + payload;
-      const char *ptr = out.data();
-      size_t remaining = out.size();
-      while (remaining > 0) {
-        int status;
-        pid_t res = waitpid(lsp->pid, &status, WNOHANG);
-        if (res == lsp->pid) {
-          clean_lsp(lsp, kv.first);
-          return;
-        }
-        ssize_t written = write(lsp->stdin_fd, ptr, remaining);
-        if (written == 0)
-          break;
-        else if (written == -1) {
-          if (errno == EINTR)
-            continue;
-          perror("write");
-          clean_lsp(lsp, kv.first);
-          return;
-        } else {
-          ptr += written;
-          remaining -= written;
-        }
-      }
-    }
-    pollfd pfd{lsp->stdout_fd, POLLIN | POLLHUP | POLLERR, 0};
-    int r = poll(&pfd, 1, 0);
-    if (r > 0 && pfd.revents & (POLLHUP | POLLERR)) {
-      clean_lsp(lsp, kv.first);
-      return;
-    }
-    while ((r = poll(&pfd, 1, 0) > 0)) {
-      if (r > 0 && pfd.revents & (POLLHUP | POLLERR)) {
-        clean_lsp(lsp, kv.first);
-        return;
-      }
-      auto msg = read_lsp_message(lsp->stdout_fd);
-      if (!msg)
-        break;
-      if (msg->contains("id")) {
-        uint32_t id = msg->at("id").get<uint32_t>();
-        auto it = lsp->pending.find(id);
-        if (it != lsp->pending.end()) {
-          LSPPending *pend = it->second;
-          lock.unlock();
-          if (pend->callback)
-            pend->callback(pend->editor, *msg);
-          delete pend;
-          lock.lock();
-          lsp->pending.erase(it);
-        }
-      } else if (msg->contains("method")) {
-        std::string uri;
-        if (msg->contains("params")) {
-          auto &p = (*msg)["params"];
-          if (p.contains("textDocument") && p["textDocument"].contains("uri"))
-            uri = p["textDocument"]["uri"].get<std::string>();
-          else if (p.contains("uri"))
-            uri = p["uri"].get<std::string>();
-        }
-        Editor *ed = editor_for_uri(lsp, uri);
-        lock.unlock();
-        if (ed)
-          editor_lsp_handle(ed, *msg);
-        else
-          lsp_handle(lsp, *msg);
-        lock.lock();
-      }
-    }
-  }
-}

src/main.cc

@@ -5,36 +5,19 @@
 #include "ruby/decl.h"
 #include "ui/bar.h"
 #include "utils/utils.h"
+#include "windows/decl.h"
 
 std::atomic<bool> running{true};
-Queue<KeyEvent> event_queue;
-std::vector<Editor *> editors;
-Bar bar;
-
-uint8_t current_editor = 0;
 std::atomic<uint8_t> mode = NORMAL;
+fs::path pwd;
+
+namespace ui {
+Bar bar;
+} // namespace ui
 
 void background_lsp() {
   while (running)
-    throttle(8ms, lsp_worker);
+    throttle(16ms, lsp_worker);
-}
-
-inline Editor *editor_at(uint8_t x, uint8_t y) {
-  for (Editor *ed : editors) {
-    Coord pos = ed->position;
-    Coord size = ed->size;
-    if (x >= pos.col && x < pos.col + size.col && y >= pos.row &&
-        y < pos.row + size.row)
-      return ed;
-  }
-  return nullptr;
-}
-
-inline uint8_t index_of(Editor *ed) {
-  for (uint8_t i = 0; i < editors.size(); i++)
-    if (editors[i] == ed)
-      return i;
-  return 0;
 }
 
 int main(int argc, char *argv[]) {
@@ -46,64 +29,63 @@ int main(int argc, char *argv[]) {
   Coord screen = start_screen();
   const char *filename = (argc > 1) ? argv[1] : "";
   uint8_t eol = read_line_endings();
-  Editor *editor =
-      new_editor(filename, {0, 0}, {screen.row - 2, screen.col}, eol);
-  bar.init(screen);
 
-  if (!editor) {
+  layout::root_tile.pos = {0, 0};
-    end_screen();
+  layout::root_tile.size = {screen.row - 2, screen.col - 1};
-    fprintf(stderr, "Failed to load editor\n");
+  auto editor = std::make_unique<Editor>(filename, eol);
-    return 1;
+  layout::focused_window = editor.get();
-  }
+  auto block = std::make_unique<TileBlock>();
+  block->tiles.push_back(std::move(editor));
+  layout::root_tile.tile = std::move(block);
 
-  editors.push_back(editor);
+  ui::bar.init(screen);
-  current_editor = editors.size() - 1;
 
   std::thread lsp_thread(background_lsp);
 
   while (running) {
-    KeyEvent event = throttle(1ms, read_key);
+    layout::focused_window->work();
-    if (event.key_type == KEY_NONE)
+    render();
-      goto render;
+    throttle(16ms, io_render);
-    if (event.key_type == KEY_CHAR && event.len == 1 &&
+    KeyEvent event;
-        event.c[0] == CTRL('q')) {
+    while (running && lsp::response_queue.empty() &&
-      free(event.c);
+           (event = read_key()).key_type == KEY_NONE)
-      running = false;
+      std::this_thread::sleep_for(1ms);
-      break;
+    uint8_t consumed = 0;
-    }
+    do {
-    if (mode != RUNNER) {
+      if (event.key_type != KEY_NONE) {
-      if (event.key_type == KEY_MOUSE) {
+        if (event.key_type == KEY_CHAR && event.len == 1 &&
-        Editor *target = editor_at(event.mouse_x, event.mouse_y);
+            event.c[0] == CTRL('q')) {
-        if (target) {
+          free(event.c);
-          if (event.mouse_state == PRESS)
+          running = false;
-            current_editor = index_of(target);
+          goto quit;
-          event.mouse_x -= target->position.col;
-          event.mouse_y -= target->position.row;
-          handle_editor_event(target, event);
         }
-      } else {
+        if (mode != RUNNER) {
-        handle_editor_event(editors[current_editor], event);
+          if (event.key_type == KEY_MOUSE) {
+            handle_click(event);
+          } else {
+            layout::focused_window->handle_event(event);
+          }
+        } else {
+          ui::bar.handle_event(event);
+        }
+        if ((event.key_type == KEY_CHAR || event.key_type == KEY_PASTE) &&
+            event.c)
+          free(event.c);
       }
-    } else {
+    } while (++consumed < 32 && (event = read_key()).key_type != KEY_NONE);
-      bar.handle(event);
+    std::unique_ptr<LSPMessage> msg;
-    }
+    while (lsp::response_queue.pop(msg)) {
-    if ((event.key_type == KEY_CHAR || event.key_type == KEY_PASTE) && event.c)
+      msg->callback(*msg);
-      free(event.c);
+    };
-  render:
-    throttle(4ms, editor_worker, editors[current_editor]);
-    bar.render();
-    render_editor(editors[current_editor]);
-    throttle(4ms, render);
   }
 
+quit:
+
   if (lsp_thread.joinable())
     lsp_thread.join();
 
   end_screen();
 
-  for (auto editor : editors)
-    free_editor(editor);
-
   ruby_shutdown();
 
   return 0;

src/ruby/bindings.cc

@@ -1,6 +1,7 @@
 #include "ruby/decl.h"
 
 mrb_value get_config_file(mrb_state *mrb, mrb_value self) {
+  UNUSED(self);
   return mrb_str_new_cstr(mrb, ruby_config_path.string().c_str());
 }
 

src/ruby/process.cc

@@ -89,8 +89,8 @@ static mrb_value sym_flags;
 static mrb_value sym_start;
 static mrb_value sym_length;
 static mrb_value sym_mode;
-static mrb_value sym_lang_name;
+static mrb_value sym_data;
-static mrb_value sym_filename;
+static mrb_value sym_foldername;
 static mrb_value sym_width;
 static mrb_value sym_normal;
 static mrb_value sym_insert;
@@ -105,8 +105,8 @@ inline void initialize_symbols() {
   sym_start = mrb_symbol_value(mrb_intern_cstr(mrb, "start"));
   sym_length = mrb_symbol_value(mrb_intern_cstr(mrb, "length"));
   sym_mode = mrb_symbol_value(mrb_intern_cstr(mrb, "mode"));
-  sym_lang_name = mrb_symbol_value(mrb_intern_cstr(mrb, "lang_name"));
+  sym_data = mrb_symbol_value(mrb_intern_cstr(mrb, "data"));
-  sym_filename = mrb_symbol_value(mrb_intern_cstr(mrb, "filename"));
+  sym_foldername = mrb_symbol_value(mrb_intern_cstr(mrb, "foldername"));
   sym_width = mrb_symbol_value(mrb_intern_cstr(mrb, "width"));
   sym_normal = mrb_symbol_value(mrb_intern_cstr(mrb, "normal"));
   sym_insert = mrb_symbol_value(mrb_intern_cstr(mrb, "insert"));
@@ -146,10 +146,8 @@ convert_highlights(mrb_state *mrb, mrb_value highlights_val) {
   return result;
 }
 
-BarLine bar_contents(uint8_t mode, std::string lang_name, uint32_t warnings,
+BarLine bar_contents(uint8_t mode, uint32_t width, std::string foldername,
-                     std::string lsp_name, std::string filename,
+                     Window *window) {
-                     std::string foldername, uint32_t line, uint32_t max_line,
-                     uint32_t width) {
   BarLine bar_line;
   static bool initialed = false;
   if (!initialed) {
@@ -158,7 +156,6 @@ BarLine bar_contents(uint8_t mode, std::string lang_name, uint32_t warnings,
   }
   int ai = mrb_gc_arena_save(mrb);
   mrb_value info = mrb_hash_new(mrb);
-  mrb_value key_mode = sym_mode;
   mrb_value val_mode;
   switch (mode) {
   case NORMAL:
@@ -177,18 +174,20 @@ BarLine bar_contents(uint8_t mode, std::string lang_name, uint32_t warnings,
     val_mode = sym_jumper;
     break;
   }
-  mrb_hash_set(mrb, info, key_mode, val_mode);
+  mrb_hash_set(mrb, info, sym_mode, val_mode);
-  mrb_value key_lang_name = sym_lang_name;
+  mrb_value val_foldername =
-  mrb_value val_lang_name =
+      mrb_str_new(mrb, foldername.c_str(), foldername.length());
-      mrb_symbol_value(mrb_intern_cstr(mrb, lang_name.c_str()));
+  mrb_hash_set(mrb, info, sym_foldername, val_foldername);
-  mrb_hash_set(mrb, info, key_lang_name, val_lang_name);
+  std::array<std::string, 5> arr = window->bar_info();
-  mrb_value key_filename = sym_filename;
+  mrb_value ary = mrb_ary_new(mrb);
-  mrb_value val_filename =
+  mrb_ary_push(mrb, ary, mrb_str_new(mrb, arr[0].c_str(), arr[0].length()));
-      mrb_str_new(mrb, filename.c_str(), filename.length());
+  mrb_ary_push(mrb, ary, mrb_str_new(mrb, arr[1].c_str(), arr[1].length()));
-  mrb_hash_set(mrb, info, key_filename, val_filename);
+  mrb_ary_push(mrb, ary, mrb_str_new(mrb, arr[2].c_str(), arr[2].length()));
-  mrb_value key_width = sym_width;
+  mrb_ary_push(mrb, ary, mrb_str_new(mrb, arr[3].c_str(), arr[3].length()));
+  mrb_ary_push(mrb, ary, mrb_str_new(mrb, arr[4].c_str(), arr[4].length()));
+  mrb_hash_set(mrb, info, sym_data, ary);
   mrb_value val_width = mrb_fixnum_value(width);
-  mrb_hash_set(mrb, info, key_width, val_width);
+  mrb_hash_set(mrb, info, sym_width, val_width);
   mrb_value mod_val = mrb_obj_value(C_module);
   mrb_value block = mrb_funcall(mrb, mod_val, "b_bar", 0);
   mrb_value val_line = mrb_funcall(mrb, block, "call", 1, info);

src/syntax/bash.cc

@@ -10,7 +10,7 @@ struct BashFullState {
   bool line_cont = false;
 
   struct Lit {
-    std::string delim = ""; // Only 1 wide for strings
+    std::string delim = "";
     bool allow_interp = false;
 
     bool operator==(const BashFullState::Lit &other) const {
@@ -24,7 +24,7 @@ struct BashFullState {
   }
 };
 
-struct BashState {
+struct BashState : StateBase {
   using full_state_type = BashFullState;
 
   int interp_level = 0;
@@ -37,26 +37,32 @@ struct BashState {
            ((full_state && other.full_state &&
              *full_state == *other.full_state));
   }
+
+  std::unique_ptr<StateBase> clone() const override {
+    return std::make_unique<BashState>(*this);
+  }
 };
 
-bool bash_state_match(std::shared_ptr<void> state_1,
+bool bash_state_match(StateBase *state_1, StateBase *state_2) {
-                      std::shared_ptr<void> state_2) {
   if (!state_1 || !state_2)
     return false;
-  return *std::static_pointer_cast<BashState>(state_1) ==
+  return *static_cast<BashState *>(state_1) ==
-         *std::static_pointer_cast<BashState>(state_2);
+         *static_cast<BashState *>(state_2);
 }
 
-std::shared_ptr<void> bash_parse(std::vector<Token> *tokens,
+std::unique_ptr<StateBase> bash_parse(std::vector<Token> *tokens,
-                                 std::shared_ptr<void> in_state,
+                                      StateBase *in_state, const char *text,
-                                 const char *text, uint32_t len,
+                                      uint32_t len, uint32_t line_num) {
-                                 uint32_t line_num) {
   static bool keywords_trie_init = false;
   if (!keywords_trie_init) {
     keywords_trie_init = true;
   }
   tokens->clear();
-  auto state = ensure_state(std::static_pointer_cast<BashState>(in_state));
+  std::unique_ptr<BashState> state;
+  if (in_state)
+    state = static_unique_ptr_cast<BashState>(in_state->clone());
+  else
+    state = std::make_unique<BashState>();
   uint32_t i = 0;
   while (len > 0 && (text[len - 1] == '\n' || text[len - 1] == '\r' ||
                      text[len - 1] == '\t' || text[len - 1] == ' '))

src/syntax/parser.cc

@@ -26,55 +26,55 @@ Parser::Parser(Editor *n_editor, std::string n_lang, uint32_t n_scroll_max) {
       assert("unknown lang should be checked by caller" && 0);
     }
   }
-  edit(0, 0, editor->root->line_count + 1);
+  line_map.apply_edit(0, editor->root->line_count + 1);
 }
 
 void Parser::edit(uint32_t start_line, uint32_t removed_rows,
                   uint32_t inserted_rows) {
   int64_t delta = (int64_t)inserted_rows - (int64_t)removed_rows;
-  if (delta < 0)
+  line_map.apply_edit(start_line, delta);
-    line_tree.erase(start_line, (uint32_t)(-delta));
-  else if (delta > 0)
-    line_tree.insert(start_line, (uint32_t)delta);
   uint32_t span = MAX(removed_rows, inserted_rows);
   uint32_t begin = (start_line > 0) ? start_line - 1 : 0;
   uint32_t end = start_line + span;
   for (uint32_t line = begin; line <= end + 1; ++line)
-    dirty_lines.push(line);
+    if (LineData *ld = line_map.at(line))
+      ld->out_state = nullptr;
 }
 
 void Parser::work() {
   if (!editor || !editor->root)
     return;
   std::vector<uint32_t> batch;
-  uint32_t c_line;
+  uint32_t line_count = editor->root->line_count + 1;
-  while (dirty_lines.pop(c_line))
+  uint32_t min_line =
-    batch.push_back(c_line);
+      scroll_max > MAX_LINES_LOOKAROUND ? scroll_max - MAX_LINES_LOOKAROUND : 0;
-  uint32_t i = MAX(0, (int64_t)scroll_max - 60);
+  uint32_t max_line = MIN(scroll_max + MAX_LINES_LOOKAROUND, line_count - 1);
-  LineData *l_iter = line_tree.start_iter(i);
+  bool sequential = false;
-  while (l_iter && i < scroll_max + 10) {
+  for (uint32_t i = min_line; i <= max_line; ++i) {
-    if (!l_iter->out_state)
+    LineData *ld = line_map.at(i);
+    if ((!ld || !ld->in_state || !ld->out_state) && !sequential) {
       batch.push_back(i);
-    i++;
+      sequential = true;
-    l_iter = line_tree.next();
+      continue;
+    }
+    sequential = false;
   }
-  line_tree.end_iter();
   for (uint32_t c_line : batch) {
     if (!running.load(std::memory_order_relaxed))
       break;
-    uint32_t min_line = scroll_max > 60 ? scroll_max - 60 : 0;
+    uint32_t min_line = scroll_max > MAX_LINES_LOOKAROUND
-    uint32_t max_line = scroll_max + 10;
+                            ? scroll_max - MAX_LINES_LOOKAROUND
-    if (c_line < min_line || c_line > max_line) {
+                            : 0;
-      dirty_lines.push(c_line);
+    uint32_t max_line = scroll_max + MAX_LINES_LOOKAROUND;
+    if (c_line < min_line || c_line > max_line)
       continue;
-    }
     uint32_t scroll_snapshot = scroll_max;
-    std::shared_ptr<void> prev_state = nullptr;
+    std::unique_ptr<StateBase> prev_state = nullptr;
-    uint32_t line_count;
+    if (c_line > 0 && c_line < line_count) {
-    line_count = line_tree.count();
+      auto lm = line_map.at(c_line - 1);
-    if (c_line > 0 && c_line < line_count)
+      if (lm && lm->out_state)
-      prev_state = line_tree.at(c_line - 1)->out_state;
+        prev_state = lm->out_state ? lm->out_state->clone() : nullptr;
-    std::shared_lock k_lock(editor->knot_mtx);
+    }
     LineIterator *it = begin_l_iter(editor->root, c_line);
     if (!it)
       continue;
@@ -82,60 +82,61 @@ void Parser::work() {
     while (cur_line < line_count) {
       if (!running.load(std::memory_order_relaxed))
         break;
-      if (scroll_snapshot != scroll_max) {
+      if (scroll_snapshot != scroll_max)
-        LineData *line_data = line_tree.at(cur_line);
-        if (line_data && !line_data->out_state)
-          dirty_lines.push(cur_line);
         break;
-      }
       if (cur_line < min_line || cur_line > max_line) {
-        dirty_lines.push(cur_line);
+        LineData *line_data = line_map.at(cur_line);
+        if (line_data)
+          line_data->out_state = nullptr;
         break;
       }
       uint32_t len;
       char *line = next_line(it, &len);
       if (!line)
         break;
-      LineData *line_data = line_tree.at(cur_line);
+      LineData *line_data = line_map.create_at(cur_line);
-      if (!line_data) {
+      std::unique_ptr<StateBase> new_state;
-        cur_line++;
-        continue;
-      }
-      std::shared_ptr<void> new_state;
       if (is_custom) {
-        std::string state = "";
+        std::string prev_value = "";
-        if (prev_state)
+        if (prev_state) {
-          state = std::static_pointer_cast<std::string>(prev_state)->c_str();
+          CustomState *prev_custom =
-        std::string out_state = parse_custom(&line_data->tokens, parser_block,
+              static_cast<CustomState *>(prev_state.get());
-                                             line, len, state, cur_line);
+          prev_value = prev_custom->value;
-        new_state = std::make_shared<std::string>(out_state);
+        }
+        std::string out_value = parse_custom(&line_data->tokens, parser_block,
+                                             line, len, prev_value, cur_line);
+        new_state = std::make_unique<CustomState>(out_value);
       } else {
-        new_state =
+        new_state = parse_func(&line_data->tokens, prev_state.get(), line, len,
-            parse_func(&line_data->tokens, prev_state, line, len, cur_line);
+                               cur_line);
       }
-      line_data->in_state = prev_state;
+      line_data->in_state = std::move(prev_state);
-      line_data->out_state = new_state;
+      line_data->out_state = std::move(new_state);
       bool done = false;
       if (cur_line + 1 < line_count) {
-        LineData *next_line_data = line_tree.at(cur_line + 1);
+        LineData *next_line_data = line_map.at(cur_line + 1);
         if (next_line_data) {
           if (is_custom) {
-            std::string a =
+            std::string a = "";
-                prev_state
+            if (new_state) {
-                    ? std::static_pointer_cast<std::string>(new_state)->c_str()
+              CustomState *cs = static_cast<CustomState *>(new_state.get());
-                    : "";
+              a = cs->value;
-            std::string b = next_line_data->in_state
+            }
-                                ? std::static_pointer_cast<std::string>(
+            std::string b = "";
-                                      next_line_data->in_state)
+            if (next_line_data->in_state) {
-                                      ->c_str()
+              CustomState *cs =
-                                : "";
+                  static_cast<CustomState *>(next_line_data->in_state.get());
+              b = cs->value;
+            }
             done = custom_compare(match_block, a, b);
           } else {
-            done = state_match_func(new_state, next_line_data->in_state);
+            done = state_match_func(new_state.get(),
+                                    next_line_data->in_state.get());
           }
         }
       }
-      prev_state = new_state;
+      prev_state =
+          line_data->out_state ? line_data->out_state->clone() : nullptr;
       cur_line++;
       if (done)
         break;

src/syntax/ruby.cc

@@ -241,20 +241,22 @@ struct RubyFullState {
   }
 };
 
-struct RubyState {
+struct RubyState : StateBase {
   using full_state_type = RubyFullState;
 
   int interp_level = 0;
-  std::stack<std::shared_ptr<RubyFullState>> interp_stack;
+  std::stack<RubyFullState> interp_stack;
-  std::shared_ptr<RubyFullState> full_state;
+  RubyFullState full_state;
   std::deque<HeredocInfo> heredocs;
 
   bool operator==(const RubyState &other) const {
     return interp_level == other.interp_level &&
            interp_stack == other.interp_stack &&
-           ((full_state && other.full_state &&
+           full_state == other.full_state && heredocs == other.heredocs;
-             *full_state == *other.full_state)) &&
+  }
-           heredocs == other.heredocs;
+
+  std::unique_ptr<StateBase> clone() const override {
+    return std::make_unique<RubyState>(*this);
   }
 };
 
@@ -278,18 +280,16 @@ inline static uint32_t get_next_word(const char *text, uint32_t i,
   return width;
 }
 
-bool ruby_state_match(std::shared_ptr<void> state_1,
+bool ruby_state_match(StateBase *state_1, StateBase *state_2) {
-                      std::shared_ptr<void> state_2) {
   if (!state_1 || !state_2)
     return false;
-  return *std::static_pointer_cast<RubyState>(state_1) ==
+  return *static_cast<RubyState *>(state_1) ==
-         *std::static_pointer_cast<RubyState>(state_2);
+         *static_cast<RubyState *>(state_2);
 }
 
-std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
+std::unique_ptr<StateBase> ruby_parse(std::vector<Token> *tokens,
-                                 std::shared_ptr<void> in_state,
+                                      StateBase *in_state, const char *text,
-                                 const char *text, uint32_t len,
+                                      uint32_t len, uint32_t line_num) {
-                                 uint32_t line_num) {
   static bool keywords_trie_init = false;
   static Trie<void> base_keywords_trie;
   static Trie<void> expecting_keywords_trie;
@@ -313,7 +313,11 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
     keywords_trie_init = true;
   }
   tokens->clear();
-  auto state = ensure_state(std::static_pointer_cast<RubyState>(in_state));
+  std::unique_ptr<RubyState> state;
+  if (in_state)
+    state = static_unique_ptr_cast<RubyState>(in_state->clone());
+  else
+    state = std::make_unique<RubyState>();
   uint32_t i = 0;
   while (len > 0 && (text[len - 1] == '\n' || text[len - 1] == '\r' ||
                      text[len - 1] == '\t' || text[len - 1] == ' '))
@@ -322,18 +326,18 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
     return state;
   bool heredoc_first = false;
   while (i < len) {
-    if (state->full_state->in_state == RubyFullState::END)
+    if (state->full_state.in_state == RubyFullState::END)
       return state;
-    if (state->full_state->in_state == RubyFullState::COMMENT) {
+    if (state->full_state.in_state == RubyFullState::COMMENT) {
       tokens->push_back({i, len, TokenKind::K_COMMENT});
       if (i == 0 && len == 4 && text[i] == '=' && text[i + 1] == 'e' &&
           text[i + 2] == 'n' && text[i + 3] == 'd') {
-        state->full_state->in_state = RubyFullState::NONE;
+        state->full_state.in_state = RubyFullState::NONE;
       }
       return state;
     }
     if (!heredoc_first &&
-        state->full_state->in_state == RubyFullState::HEREDOC) {
+        state->full_state.in_state == RubyFullState::HEREDOC) {
       if (i == 0) {
         uint32_t start = 0;
         if (state->heredocs.front().allow_indentation)
@@ -344,7 +348,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
                     state->heredocs.front().delim.length())) {
           state->heredocs.pop_front();
           if (state->heredocs.empty())
-            state->full_state->in_state = RubyFullState::NONE;
+            state->full_state.in_state = RubyFullState::NONE;
           tokens->push_back({i, len, TokenKind::K_ANNOTATION});
           return state;
         }
@@ -421,7 +425,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
             tokens->push_back({i, i + 2, TokenKind::K_INTERPOLATION});
             i += 2;
             state->interp_stack.push(state->full_state);
-            state->full_state = std::make_shared<RubyFullState>();
+            state->full_state = RubyFullState();
             state->interp_level = 1;
             break;
           }
@@ -432,7 +436,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
         continue;
       }
     }
-    if (state->full_state->in_state == RubyFullState::STRING) {
+    if (state->full_state.in_state == RubyFullState::STRING) {
       uint32_t start = i;
       while (i < len) {
         if (text[i] == '\\') {
@@ -496,36 +500,36 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
           tokens->push_back({start, i, TokenKind::K_ESCAPE});
           continue;
         }
-        if (state->full_state->lit.allow_interp && text[i] == '#' &&
+        if (state->full_state.lit.allow_interp && text[i] == '#' &&
             i + 1 < len && text[i + 1] == '{') {
           tokens->push_back({start, i, TokenKind::K_STRING});
           tokens->push_back({i, i + 2, TokenKind::K_INTERPOLATION});
           i += 2;
           state->interp_stack.push(state->full_state);
-          state->full_state = std::make_shared<RubyFullState>();
+          state->full_state = RubyFullState();
           state->interp_level = 1;
           break;
         }
-        if (text[i] == state->full_state->lit.delim_start &&
+        if (text[i] == state->full_state.lit.delim_start &&
-            state->full_state->lit.delim_start !=
+            state->full_state.lit.delim_start !=
-                state->full_state->lit.delim_end) {
+                state->full_state.lit.delim_end) {
-          state->full_state->lit.brace_level++;
+          state->full_state.lit.brace_level++;
         }
-        if (text[i] == state->full_state->lit.delim_end) {
+        if (text[i] == state->full_state.lit.delim_end) {
-          if (state->full_state->lit.delim_start ==
+          if (state->full_state.lit.delim_start ==
-              state->full_state->lit.delim_end) {
+              state->full_state.lit.delim_end) {
             i++;
             tokens->push_back({start, i, TokenKind::K_STRING});
-            state->full_state->in_state = RubyFullState::NONE;
+            state->full_state.in_state = RubyFullState::NONE;
-            state->full_state->expecting_expr = false;
+            state->full_state.expecting_expr = false;
             break;
           } else {
-            state->full_state->lit.brace_level--;
+            state->full_state.lit.brace_level--;
-            if (state->full_state->lit.brace_level == 0) {
+            if (state->full_state.lit.brace_level == 0) {
               i++;
               tokens->push_back({start, i, TokenKind::K_STRING});
-              state->full_state->in_state = RubyFullState::NONE;
+              state->full_state.in_state = RubyFullState::NONE;
-              state->full_state->expecting_expr = false;
+              state->full_state.expecting_expr = false;
               break;
             }
           }
@@ -536,7 +540,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
         tokens->push_back({start, len, TokenKind::K_STRING});
       continue;
     }
-    if (state->full_state->in_state == RubyFullState::REGEXP) {
+    if (state->full_state.in_state == RubyFullState::REGEXP) {
       uint32_t start = i;
       while (i < len) {
         if (text[i] == '\\') {
@@ -605,30 +609,30 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
           tokens->push_back({i, i + 2, TokenKind::K_INTERPOLATION});
           i += 2;
           state->interp_stack.push(state->full_state);
-          state->full_state = std::make_shared<RubyFullState>();
+          state->full_state = RubyFullState();
           state->interp_level = 1;
           break;
         }
-        if (text[i] == state->full_state->lit.delim_start &&
+        if (text[i] == state->full_state.lit.delim_start &&
-            state->full_state->lit.delim_start !=
+            state->full_state.lit.delim_start !=
-                state->full_state->lit.delim_end) {
+                state->full_state.lit.delim_end) {
-          state->full_state->lit.brace_level++;
+          state->full_state.lit.brace_level++;
         }
-        if (text[i] == state->full_state->lit.delim_end) {
+        if (text[i] == state->full_state.lit.delim_end) {
-          if (state->full_state->lit.delim_start ==
+          if (state->full_state.lit.delim_start ==
-              state->full_state->lit.delim_end) {
+              state->full_state.lit.delim_end) {
             i += 1;
             tokens->push_back({start, i, TokenKind::K_REGEXP});
-            state->full_state->in_state = RubyFullState::NONE;
+            state->full_state.in_state = RubyFullState::NONE;
-            state->full_state->expecting_expr = false;
+            state->full_state.expecting_expr = false;
             break;
           } else {
-            state->full_state->lit.brace_level--;
+            state->full_state.lit.brace_level--;
-            if (state->full_state->lit.brace_level == 0) {
+            if (state->full_state.lit.brace_level == 0) {
               i += 1;
               tokens->push_back({start, i, TokenKind::K_REGEXP});
-              state->full_state->in_state = RubyFullState::NONE;
+              state->full_state.in_state = RubyFullState::NONE;
-              state->full_state->expecting_expr = false;
+              state->full_state.expecting_expr = false;
               break;
             }
           }
@@ -642,8 +646,8 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
     if (i == 0 && len == 6) {
       if (text[i] == '=' && text[i + 1] == 'b' && text[i + 2] == 'e' &&
           text[i + 3] == 'g' && text[i + 4] == 'i' && text[i + 5] == 'n') {
-        state->full_state->in_state = RubyFullState::COMMENT;
+        state->full_state.in_state = RubyFullState::COMMENT;
-        state->full_state->expecting_expr = false;
+        state->full_state.expecting_expr = false;
         tokens->push_back({0, len, TokenKind::K_COMMENT});
         return state;
       }
@@ -653,8 +657,8 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
           text[i + 3] == 'N' && text[i + 4] == 'D' && text[i + 5] == '_' &&
           text[i + 6] == '_') {
         tokens->clear();
-        state->full_state->in_state = RubyFullState::END;
+        state->full_state.in_state = RubyFullState::END;
-        state->full_state->expecting_expr = false;
+        state->full_state.expecting_expr = false;
         return state;
       }
     }
@@ -684,33 +688,33 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
             delim += text[j++];
         }
       }
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       if (!delim.empty()) {
         tokens->push_back({s, j, TokenKind::K_ANNOTATION});
         state->heredocs.push_back({delim, interpolation, indented});
-        state->full_state->in_state = RubyFullState::HEREDOC;
+        state->full_state.in_state = RubyFullState::HEREDOC;
         heredoc_first = true;
       }
       i = j;
       continue;
     }
-    if (text[i] == '/' && state->full_state->expecting_expr) {
+    if (text[i] == '/' && state->full_state.expecting_expr) {
       tokens->push_back({i, i + 1, TokenKind::K_REGEXP});
-      state->full_state->in_state = RubyFullState::REGEXP;
+      state->full_state.in_state = RubyFullState::REGEXP;
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
-      state->full_state->lit.delim_start = '/';
+      state->full_state.lit.delim_start = '/';
-      state->full_state->lit.delim_end = '/';
+      state->full_state.lit.delim_end = '/';
-      state->full_state->lit.allow_interp = true;
+      state->full_state.lit.allow_interp = true;
       i++;
       continue;
     } else if (text[i] == '#') {
       if (line_num == 0 && i == 0 && len > 4 && text[i + 1] == '!') {
-        state->full_state->expecting_expr = false;
+        state->full_state.expecting_expr = false;
         tokens->push_back({0, len, TokenKind::K_SHEBANG});
         return state;
       }
       tokens->push_back({i, len, TokenKind::K_COMMENT});
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       return state;
     } else if (text[i] == '.') {
       uint32_t start = i;
@@ -722,15 +726,15 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
         }
       }
       tokens->push_back({start, i, TokenKind::K_OPERATOR});
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       continue;
     } else if (text[i] == ':') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       uint32_t start = i;
       i++;
       if (i >= len) {
         tokens->push_back({start, i, TokenKind::K_OPERATOR});
-        state->full_state->expecting_expr = true;
+        state->full_state.expecting_expr = true;
         continue;
       }
       if (text[i] == ':') {
@@ -739,7 +743,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
       }
       if (text[i] == '\'' || text[i] == '"') {
         tokens->push_back({start, i, TokenKind::K_LABEL});
-        state->full_state->expecting_expr = true;
+        state->full_state.expecting_expr = true;
         continue;
       }
       if (text[i] == '$' || text[i] == '@') {
@@ -767,7 +771,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
       tokens->push_back({start, i, TokenKind::K_OPERATOR});
       continue;
     } else if (text[i] == '@') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       uint32_t start = i;
       i++;
       if (i >= len)
@@ -783,7 +787,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
       tokens->push_back({start, i, TokenKind::K_VARIABLEINSTANCE});
       continue;
     } else if (text[i] == '$') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       uint32_t start = i;
       i++;
       if (i >= len)
@@ -806,7 +810,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
       tokens->push_back({start, i, TokenKind::K_VARIABLEGLOBAL});
       continue;
     } else if (text[i] == '?') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       uint32_t start = i;
       i++;
       if (i < len && text[i] == '\\') {
@@ -851,95 +855,95 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
         tokens->push_back({start, i, TokenKind::K_CHAR});
         continue;
       } else {
-        state->full_state->expecting_expr = true;
+        state->full_state.expecting_expr = true;
         tokens->push_back({start, i, TokenKind::K_OPERATOR});
         continue;
       }
     } else if (text[i] == '{') {
-      state->full_state->expecting_expr = true;
+      state->full_state.expecting_expr = true;
       uint8_t brace_color =
-          (uint8_t)TokenKind::K_BRACE1 + (state->full_state->brace_level % 5);
+          (uint8_t)TokenKind::K_BRACE1 + (state->full_state.brace_level % 5);
       tokens->push_back({i, i + 1, (TokenKind)brace_color});
       state->interp_level++;
-      state->full_state->brace_level++;
+      state->full_state.brace_level++;
       i++;
       continue;
     } else if (text[i] == '}') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       state->interp_level--;
       if (state->interp_level == 0 && !state->interp_stack.empty()) {
         state->full_state = state->interp_stack.top();
         state->interp_stack.pop();
         tokens->push_back({i, i + 1, TokenKind::K_INTERPOLATION});
       } else {
-        state->full_state->brace_level--;
+        state->full_state.brace_level--;
         uint8_t brace_color =
-            (uint8_t)TokenKind::K_BRACE1 + (state->full_state->brace_level % 5);
+            (uint8_t)TokenKind::K_BRACE1 + (state->full_state.brace_level % 5);
         tokens->push_back({i, i + 1, (TokenKind)brace_color});
       }
       i++;
       continue;
     } else if (text[i] == '(') {
-      state->full_state->expecting_expr = true;
+      state->full_state.expecting_expr = true;
       uint8_t brace_color =
-          (uint8_t)TokenKind::K_BRACE1 + (state->full_state->brace_level % 5);
+          (uint8_t)TokenKind::K_BRACE1 + (state->full_state.brace_level % 5);
       tokens->push_back({i, i + 1, (TokenKind)brace_color});
-      state->full_state->brace_level++;
+      state->full_state.brace_level++;
       i++;
       continue;
     } else if (text[i] == ')') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
-      state->full_state->brace_level--;
+      state->full_state.brace_level--;
       uint8_t brace_color =
-          (uint8_t)TokenKind::K_BRACE1 + (state->full_state->brace_level % 5);
+          (uint8_t)TokenKind::K_BRACE1 + (state->full_state.brace_level % 5);
       tokens->push_back({i, i + 1, (TokenKind)brace_color});
       i++;
       continue;
     } else if (text[i] == '[') {
-      state->full_state->expecting_expr = true;
+      state->full_state.expecting_expr = true;
       uint8_t brace_color =
-          (uint8_t)TokenKind::K_BRACE1 + (state->full_state->brace_level % 5);
+          (uint8_t)TokenKind::K_BRACE1 + (state->full_state.brace_level % 5);
       tokens->push_back({i, i + 1, (TokenKind)brace_color});
-      state->full_state->brace_level++;
+      state->full_state.brace_level++;
       i++;
       continue;
     } else if (text[i] == ']') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
-      state->full_state->brace_level--;
+      state->full_state.brace_level--;
       uint8_t brace_color =
-          (uint8_t)TokenKind::K_BRACE1 + (state->full_state->brace_level % 5);
+          (uint8_t)TokenKind::K_BRACE1 + (state->full_state.brace_level % 5);
       tokens->push_back({i, i + 1, (TokenKind)brace_color});
       i++;
       continue;
     } else if (text[i] == '\'') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       tokens->push_back({i, i + 1, TokenKind::K_STRING});
-      state->full_state->in_state = RubyFullState::STRING;
+      state->full_state.in_state = RubyFullState::STRING;
-      state->full_state->lit.delim_start = '\'';
+      state->full_state.lit.delim_start = '\'';
-      state->full_state->lit.delim_end = '\'';
+      state->full_state.lit.delim_end = '\'';
-      state->full_state->lit.allow_interp = false;
+      state->full_state.lit.allow_interp = false;
       i++;
       continue;
     } else if (text[i] == '"') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       tokens->push_back({i, i + 1, TokenKind::K_STRING});
-      state->full_state->in_state = RubyFullState::STRING;
+      state->full_state.in_state = RubyFullState::STRING;
-      state->full_state->lit.delim_start = '"';
+      state->full_state.lit.delim_start = '"';
-      state->full_state->lit.delim_end = '"';
+      state->full_state.lit.delim_end = '"';
-      state->full_state->lit.allow_interp = true;
+      state->full_state.lit.allow_interp = true;
       i++;
       continue;
     } else if (text[i] == '`') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       tokens->push_back({i, i + 1, TokenKind::K_STRING});
-      state->full_state->in_state = RubyFullState::STRING;
+      state->full_state.in_state = RubyFullState::STRING;
-      state->full_state->lit.delim_start = '`';
+      state->full_state.lit.delim_start = '`';
-      state->full_state->lit.delim_end = '`';
+      state->full_state.lit.delim_end = '`';
-      state->full_state->lit.allow_interp = true;
+      state->full_state.lit.allow_interp = true;
       i++;
       continue;
     } else if (text[i] == '%') {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       if (i + 1 >= len) {
         i++;
         continue;
@@ -1005,16 +1009,16 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
       tokens->push_back(
           {i, i + prefix_len + 1,
            (is_regexp ? TokenKind::K_REGEXP : TokenKind::K_STRING)});
-      state->full_state->in_state =
+      state->full_state.in_state =
           is_regexp ? RubyFullState::REGEXP : RubyFullState::STRING;
-      state->full_state->lit.delim_start = delim_start;
+      state->full_state.lit.delim_start = delim_start;
-      state->full_state->lit.delim_end = delim_end;
+      state->full_state.lit.delim_end = delim_end;
-      state->full_state->lit.allow_interp = allow_interp;
+      state->full_state.lit.allow_interp = allow_interp;
-      state->full_state->lit.brace_level = 1;
+      state->full_state.lit.brace_level = 1;
       i += prefix_len + 1;
       continue;
     } else if (isdigit(text[i])) {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       uint32_t start = i;
       if (text[i] == '0') {
         i++;
@@ -1115,7 +1119,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
       tokens->push_back({start, i, TokenKind::K_NUMBER});
       continue;
     } else if (identifier_start_char(text[i])) {
-      state->full_state->expecting_expr = false;
+      state->full_state.expecting_expr = false;
       uint32_t length;
       if ((length = base_keywords_trie.match(text, i, len, identifier_char))) {
         tokens->push_back({i, i + length, TokenKind::K_KEYWORD});
@@ -1123,7 +1127,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
         continue;
       } else if ((length = expecting_keywords_trie.match(text, i, len,
                                                          identifier_char))) {
-        state->full_state->expecting_expr = true;
+        state->full_state.expecting_expr = true;
         tokens->push_back({i, i + length, TokenKind::K_KEYWORD});
         i += length;
         continue;
@@ -1134,7 +1138,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
         continue;
       } else if ((length = expecting_operators_trie.match(
                       text, i, len, identifier_char)) > 0) {
-        state->full_state->expecting_expr = true;
+        state->full_state.expecting_expr = true;
         tokens->push_back({i, i + length, TokenKind::K_KEYWORDOPERATOR});
         i += length;
         continue;
@@ -1256,7 +1260,7 @@ std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
                operator_trie.match(text, i, len, [](char) { return false; }))) {
         tokens->push_back({i, i + op_len, TokenKind::K_OPERATOR});
         i += op_len;
-        state->full_state->expecting_expr = true;
+        state->full_state.expecting_expr = true;
         continue;
       } else {
         i += utf8_codepoint_width(text[i]);

src/ui/bar.cc

@@ -3,17 +3,25 @@
 #include "lsp/lsp.h"
 #include "main.h"
 #include "syntax/decl.h"
+#include "windows/decl.h"
 
-void Bar::log(std::string message) { log_line = message; }
+void Bar::log(std::string message) { log_line = strip_newlines(message); }
 
-void Bar::render() {
+void Bar::render(std::vector<ScreenCell> &buffer) {
   USING(LSPInstance);
-  Editor *editor = editors[current_editor];
+  BarLine bar_line;
-  BarLine bar_line =
+  bar_line =
-      bar_contents(mode, editor->lang.name, editor->warnings.size(),
+      bar_contents(mode, screen.col, pwd.string(), layout::focused_window);
-                   editor->lsp ? editor->lsp->lsp->command : "",
+  auto update = [&](uint32_t row, uint32_t col, std::string text, uint32_t fg,
-                   editor->filename, editor->filename, editor->cursor.row + 1,
+                    uint32_t bg, uint8_t flags, uint32_t width) {
-                   editor->root->line_count + 1, screen.col);
+    ScreenCell &c = buffer[row * screen.col + col];
+    c.utf8 = text;
+    c.width = width;
+    c.fg = fg;
+    c.bg = bg;
+    c.flags = flags;
+    c.ul_color = 0;
+  };
   uint32_t row = screen.row - 2;
   uint32_t width = screen.col;
   std::string &line = bar_line.line;
@@ -26,43 +34,46 @@ void Bar::render() {
     int width = display_width(cluster.c_str(), cluster_len);
     Highlight highlight = bar_line.get_highlight(col);
     update(row, col, cluster.c_str(), highlight.fg, highlight.bg,
-           highlight.flags);
+           highlight.flags, width);
     col += width;
     i += cluster_len;
     for (int w = 1; w < width; w++)
-      update(row, col - w, "\x1b", highlight.fg, highlight.bg, highlight.flags);
+      update(row, col - w, "\x1b", highlight.fg, highlight.bg, highlight.flags,
+             0);
   }
   while (col < width)
-    update(row, col++, " ", 0, 0, 0);
+    update(row, col++, " ", 0, 0, 0, 1);
   col = 0;
   row++;
   if (mode == RUNNER) {
-    update(row, col++, ":", 0xFFFFFF, 0, 0);
+    update(row, col++, ":", 0xFFFFFF, 0, 0, 1);
     for (char c : command)
-      update(row, col++, (char[2]){c, 0}, 0xFFFFFF, 0, 0);
+      update(row, col++, (char[2]){c, 0}, 0xFFFFFF, 0, 0, 1);
   } else {
     for (char c : log_line)
-      update(row, col++, (char[2]){c, 0}, 0xFFFFFF, 0, 0);
+      update(row, col++, (char[2]){c, 0}, 0xFFFFFF, 0, 0, 1);
   }
   while (col < width)
-    update(row, col++, " ", 0, 0, 0);
+    update(row, col++, " ", 0, 0, 0, 1);
 }
 
-void Bar::handle(KeyEvent event) {
+void Bar::handle_command(std::string &command) {
+  if (command == "q") {
+    running = false;
+    return;
+  }
+  if (layout::focused_window)
+    layout::focused_window->handle_command(command);
+}
+
+void Bar::handle_event(KeyEvent event) {
   if (event.key_type == KEY_CHAR && event.len == 1) {
     if (event.c[0] == 0x1B) {
       command = "";
       mode = NORMAL;
     } else if (event.c[0] == '\n' || event.c[0] == '\r') {
       command = trim(command);
-      if (command == "w") {
+      handle_command(command);
-        save_file(editors[current_editor]);
-      } else if (command == "q") {
-        running = false;
-      } else if (command == "wq") {
-        save_file(editors[current_editor]);
-        running = false;
-      }
       mode = NORMAL;
       command = "";
     } else if (isprint((unsigned char)(event.c[0]))) {

src/ui/completionbox.cc

@@ -1,4 +1,4 @@
-#include "ui/completionbox.h"
+/* #include "ui/completionbox.h"
 #include "editor/completions.h"
 #include "io/sysio.h"
 #include "utils/utils.h"
@@ -86,9 +86,9 @@ void CompletionBox::render_update() {
   uint32_t total = session->visible.size();
   uint32_t rows = MIN(total, 8);
   size.row = rows + 2;
-  size.col = 2 + 2 + max_label_len + 1 + max_detail_len + 2 + max_kind_len + 1;
+  size.col = 2 + 2 + max_label_len + 1 + max_detail_len + 2 + max_kind_len +
-  cells.assign(size.row * size.col, {" ", 0, 0, 0, 0, 0});
+  1; cells.assign(size.row * size.col, {" ", 0, 0, 0, 0, 0}); auto set =
-  auto set = [&](uint32_t r, uint32_t c, const char *text, uint32_t fg,
+  [&](uint32_t r, uint32_t c, const char *text, uint32_t fg,
                  uint32_t bg, uint8_t flags) {
     if (r < size.row && c < size.col)
       cells[r * size.col + c] = {std::string(text), 0, fg, bg, flags, 0};
@@ -104,14 +104,11 @@ void CompletionBox::render_update() {
   for (uint32_t row_idx = start; row_idx < end; row_idx++) {
     uint32_t r = (row_idx - start) + 1;
     auto &item = session->items[session->visible[row_idx]];
-    uint32_t bg = (session->visible[row_idx] == session->select) ? sel_bg : 1;
+    uint32_t bg = (session->visible[row_idx] == session->select) ? sel_bg :
-    uint32_t fg = 0xFFFFFF;
+    1; uint32_t fg = 0xFFFFFF; set(r, 0, "│", border_fg, 0, 0); uint32_t c =
-    set(r, 0, "│", border_fg, 0, 0);
+    1; const char *sym = item_symbol(item.kind); set(r, c++, sym,
-    uint32_t c = 1;
+    kind_color(item.kind), bg, 0); set(r, c++, " ", fg, bg, 0); for (size_t i
-    const char *sym = item_symbol(item.kind);
+    = 0; i < item.label.size(); i++)
-    set(r, c++, sym, kind_color(item.kind), bg, 0);
-    set(r, c++, " ", fg, bg, 0);
-    for (size_t i = 0; i < item.label.size(); i++)
       set(r, c + i, (char[2]){item.label[i], 0}, fg, bg,
           item.deprecated ? CF_STRIKETHROUGH : 0);
     c += item.label.size();
@@ -128,7 +125,8 @@ void CompletionBox::render_update() {
     c += pad;
     std::string kind_name = item_kind_name(item.kind);
     for (size_t i = 0; i < kind_name.size(); i++)
-      set(r, c + i, (char[2]){kind_name[i], 0}, kind_color(item.kind), bg, 0);
+      set(r, c + i, (char[2]){kind_name[i], 0}, kind_color(item.kind), bg,
+      0);
     set(r, size.col - 1, "│", border_fg, 0, 0);
   }
   uint32_t bottom = size.row - 1;
@@ -137,7 +135,8 @@ void CompletionBox::render_update() {
     set(bottom, c, "─", border_fg, 0, 0);
   set(bottom, size.col - 1, "┘", border_fg, 0, 0);
   if (session->visible.size() > 8) {
-    std::string info = std::to_string(start + 1) + "-" + std::to_string(end) +
+    std::string info = std::to_string(start + 1) + "-" + std::to_string(end)
+    +
                        "/" + std::to_string(session->visible.size());
     for (size_t i = 0; i < info.size() && i < size.col - 2; i++)
       set(bottom, 1 + i, (char[2]){info[i], 0}, border_fg, 0, 0);
@@ -152,9 +151,8 @@ void CompletionBox::render(Coord pos) {
   if (start_row < 0)
     start_row = pos.row + 1;
   int32_t start_col = pos.col;
-  Coord screen_size = get_size();
+  if (start_col + size.col > io::cols) {
-  if (start_col + size.col > screen_size.col) {
+    start_col = io::cols - size.col;
-    start_col = screen_size.col - size.col;
     if (start_col < 0)
       start_col = 0;
   }
@@ -180,8 +178,10 @@ void CompletionBox::render(Coord pos) {
                                position.col - session->hover.size.col});
       } else {
         session->hover.render(
-            {position.row + session->hover.size.row, position.col + size.col});
+            {position.row + session->hover.size.row, position.col +
+            size.col});
       }
     }
   }
 }
+ */

src/utils/system.cc

@@ -59,6 +59,7 @@ char *load_file(const char *path, uint32_t *out_len, bool *out_eol) {
   bool has_utf8_bom = (bom[0] == 0xEF && bom[1] == 0xBB && bom[2] == 0xBF);
   uint32_t skip = has_utf8_bom ? 3 : 0;
   uint32_t data_len = static_cast<uint32_t>(len) - skip;
+  file.clear();
   file.seekg(skip, std::ios::beg);
   char *buf = (char *)malloc(data_len + 1);
   if (!buf)

src/utils/text.cc

@@ -91,6 +91,15 @@ std::string trim(const std::string &s) {
   return s.substr(start, end - start + 1);
 }
 
+std::string strip_newlines(const std::string &s) {
+  std::string out;
+  out.reserve(s.size());
+  for (char c : s)
+    if (c != '\n' && c != '\r')
+      out.push_back(c);
+  return out;
+}
+
 std::string clean_text(const std::string &input) {
   std::string result = input;
   static const std::unordered_map<std::string, std::string> entities = {

src/windows/renderer.cc

@@ -0,0 +1,49 @@
+#include "io/sysio.h"
+#include "main.h"
+#include "windows/decl.h"
+
+namespace layout {
+TileBase root_tile;
+Window *focused_window;
+std::vector<std::unique_ptr<Popup>> popups;
+std::vector<std::unique_ptr<TileBase>> floating_tiles;
+} // namespace layout
+
+void render() {
+  ui::bar.render(io::new_screen);
+  layout::root_tile.render(io::new_screen);
+  for (auto &tile : layout::floating_tiles) {
+    if (tile->hidden())
+      continue;
+    tile->render(io::new_screen);
+  }
+  for (auto &popup : layout::popups) {
+    if (popup->hidden)
+      continue;
+    popup->render(io::new_screen, popup->size, popup->pos);
+  }
+}
+
+void handle_click(KeyEvent event) {
+  for (auto &popup : layout::popups) {
+    if (!popup->hidden &&
+        inside({event.mouse_y, event.mouse_x}, popup->pos, popup->size)) {
+      event.mouse_x -= popup->pos.col;
+      event.mouse_y -= popup->pos.row;
+      popup->handle_click(event, popup->size);
+      return;
+    }
+  }
+  for (auto &tile : layout::floating_tiles) {
+    if (!tile->hidden() &&
+        inside({event.mouse_y, event.mouse_x}, tile->pos, tile->size)) {
+      event.mouse_x -= tile->pos.col;
+      event.mouse_y -= tile->pos.row;
+      tile->handle_click(event);
+      return;
+    }
+  }
+  if (inside({event.mouse_y, event.mouse_x}, layout::root_tile.pos,
+             layout::root_tile.size))
+    layout::root_tile.handle_click(event);
+}