Cleanup / optimizations

Rewrite diagnostics popup with new api
Improve highlighting structure
2026-02-12 01:01:52 +00:00 · 2026-02-11 19:51:45 +00:00 · 2026-02-11 18:18:28 +00:00 · 2026-02-05 14:23:52 +00:00
34 changed files with 831 additions and 835 deletions
--- a/README.md
+++ b/README.md
@@ -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

--- a/TODO.md
+++ b/TODO.md
@@ -2,19 +2,12 @@ Copyright 2025 Syed Daanish

 # TODO

-# memory usage for debug build (release build will be smaller by about 25%)
-```
-8K   ->    13.2M
-128K ->    13.2M (expected worst case 16.6M)
-128M ->   412.0M (expected worst case 2.3G)
-```
-
 ## Next few super long boring things to do::
 * redo lsp threads such that no mutex needed for any rope stuff (done)
    - Also make the classes own the methods in lsp (done)
    - This will mean that parsers/renderers and keystrokes will not need to be individually locked (done)
    - And so it will be much faster (done)
-    - At which point the main thread can also be blocked on user input or lsp responses and still be fast
+    - At which point the main thread can also be blocked on user input or lsp responses and still be faster
 * Add a superclass for editor called Window (which can be popup or tiled) (done)
 * Add a recursive tiling class for windows (done)
 * Handled by a single renderer that calls and renders each window (done)
@@ -44,6 +37,7 @@ Copyright 2025 Syed Daanish
 * 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)
--- a/include/editor/editor.h
+++ b/include/editor/editor.h
@@ -2,11 +2,12 @@
 #define EDITOR_H

 #include "editor/indents.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/diagnostics.h"
 #include "utils/utils.h"
 #include "windows/decl.h"

@@ -37,8 +38,8 @@ struct Editor : Window {
  VAI ai = {};
  std::shared_mutex lsp_mtx;
  std::atomic<struct LSPInstance *> lsp = nullptr;
-  bool hover_active = false;
-  bool diagnostics_active = false;
+  HoverBox *hover_popup = init_hover();
+  DiagnosticBox *diagnostic_popup = init_diagnostic();
  std::atomic<int> lsp_version = 1;
  IndentationEngine indents = {};
  Parser *parser = nullptr;
--- a/include/extentions/diagnostics.h
+++ b/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
--- a/include/extentions/hover.h
+++ b/include/extentions/hover.h
@@ -6,9 +6,7 @@
 #include "utils/utils.h"
 #include "windows/decl.h"

-TileRoot *init_hover();
-
-struct HoverBox : Window {
+struct HoverBox : Popup {
  std::string text;
  std::atomic<bool> is_markup;
  uint32_t scroll_;
@@ -24,8 +22,16 @@ struct HoverBox : Window {
  }
  void scroll(int32_t number);
  void render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) override;
-  void handle_click(KeyEvent, Coord) override { this->hidden = true; };
+  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
--- a/include/io/sysio.h
+++ b/include/io/sysio.h
@@ -96,14 +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 set_cursor(uint8_t row, uint8_t col, uint32_t type,
                bool show_cursor_param);
 void io_render();
-Coord get_size();

 KeyEvent read_key();

--- a/include/lsp/lsp.h
+++ b/include/lsp/lsp.h
@@ -2,19 +2,15 @@
 #define LSP_H

 #include "editor/editor.h"
+#include "main.h"
 #include "pch.h"
 #include "utils/utils.h"
+#include <cstdint>
+#include <sys/types.h>

-#define LSP_TIMEOUT 3000
-
-namespace lsp {
-extern std::mutex lsp_mutex;
-extern std::unordered_map<std::string, std::unique_ptr<LSPInstance>>
-    active_lsps;
-extern Queue<std::string> need_opening;
-extern std::unordered_set<std::string> opened;
-extern std::vector<Editor *> new_editors;
-} // namespace lsp
+#define LSP_TIMEOUT_START 3000
+#define LSP_TIMEOUT_QUIT_NORMAL 300
+#define LSP_TIMEOUT_QUIT_FORCE 80

 void lsp_worker();

@@ -48,6 +44,16 @@ struct LSPMessage {
  std::function<void(const LSPMessage &)> callback;
 };

+namespace lsp {
+extern std::mutex lsp_mutex;
+extern std::unordered_map<std::string, std::unique_ptr<LSPInstance>>
+    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
+
 struct LSPInstance {
  const LSP *lsp_info;
  std::string root_dir;
@@ -70,7 +76,6 @@ struct LSPInstance {
  Queue<json> inbox;
  Queue<json> outbox;
  std::unordered_map<uint32_t, std::unique_ptr<LSPMessage>> pending;
-  std::vector<std::unique_ptr<LSPMessage>> lsp_response_queue;
  std::vector<Editor *> editors;

  LSPInstance(std::string lsp_id) {
@@ -89,7 +94,15 @@ struct LSPInstance {
          {"capabilities", client_capabilities}}}};
    send_raw(initialize_message);
    pollfd pfd{stdout_fd, POLLIN, 0};
-    poll(&pfd, 1, LSP_TIMEOUT);
+    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;
@@ -116,9 +129,7 @@ struct LSPInstance {
        }
      }
      allow_formatting = caps.value("documentFormattingProvider", false);
-      if (lsp_id != "lua-language-server" /* Lua ls gives terrible ontype
-                                             formatting so disable */
-          && caps.contains("documentOnTypeFormattingProvider")) {
+      if (caps.contains("documentOnTypeFormattingProvider")) {
        auto &fmt = caps["documentOnTypeFormattingProvider"];
        if (fmt.is_object()) {
          if (fmt.contains("firstTriggerCharacter")) {
@@ -181,34 +192,39 @@ struct LSPInstance {
    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 = {{"id", ++last_id}, {"method", "shutdown"}};
+    json shutdown = {
+        {"jsonrpc", "2.0"}, {"id", ++last_id}, {"method", "shutdown"}};
    send_raw(shutdown);
    pollfd pfd{stdout_fd, POLLIN, 0};
-    poll(&pfd, 1, 500);
-    json exit_msg = {{"method", "exit"}};
+    poll(&pfd, 1, timeout);
+    if (pfd.revents & POLLIN) {
+      json exit_msg = {{"jsonrpc", "2.0"}, {"method", "exit"}};
      send_raw(exit_msg);
      int waited = 0;
-    while (waited < 100) {
+      while (waited < timeout) {
        int status;
        pid_t res = waitpid(pid, &status, WNOHANG);
        if (res == pid)
          break;
-      std::this_thread::sleep_for(std::chrono::milliseconds(10));
+        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;
-    close(stdin_fd);
-    close(stdout_fd);
  }
  bool init_process() {
    int in_pipe[2];
@@ -314,7 +330,7 @@ struct LSPInstance {
        if (it != pending.end()) {
          if (it->second->editor) {
            it->second->message = *msg;
-            lsp_response_queue.push_back(std::move(it->second));
+            lsp::response_queue.push(std::move(it->second));
          } else {
            auto message = *std::move(it->second);
            message.message = *msg;
@@ -337,7 +353,7 @@ struct LSPInstance {
        response->message = *msg;
        response->callback = editor_handle_wrapper;
        if (ed)
-          lsp_response_queue.push_back(std::move(response));
+          lsp::response_queue.push(std::move(response));
        else
          lsp_handle(*msg);
      }
@@ -346,11 +362,6 @@ struct LSPInstance {
  inline static void editor_handle_wrapper(const LSPMessage &message) {
    message.editor->lsp_handle(message.message);
  }
-  void callbacks() {
-    for (auto &message : lsp_response_queue)
-      message->callback(*message);
-    lsp_response_queue.clear();
-  }
  inline void send_raw(const json &msg) {
    std::string payload = msg.dump();
    std::string header =
--- a/include/main.h
+++ b/include/main.h
@@ -16,7 +16,6 @@ extern fs::path pwd;

 namespace ui {
 extern Bar bar;
-extern TileRoot *hover_popup;
 } // namespace ui

 #endif
--- a/include/syntax/decl.h
+++ b/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
--- a/include/syntax/langs.h
+++ b/include/syntax/langs.h
@@ -4,29 +4,19 @@
 #include "syntax/decl.h"

 #define DEF_LANG(name)                                                         \
-  std::shared_ptr<void> name##_parse(                                          \
-      std::vector<Token> *tokens, std::shared_ptr<void> in_state,              \
-      const char *text, uint32_t len, uint32_t line_num);                      \
-  bool name##_state_match(std::shared_ptr<void> state_1,                       \
-                          std::shared_ptr<void> state_2);
+  std::unique_ptr<StateBase> name##_parse(                                     \
+      std::vector<Token> *tokens, StateBase *in_state, const char *text,       \
+      uint32_t len, uint32_t line_num);                                        \
+  bool name##_state_match(StateBase *state_1, StateBase *state_2);

 #define LANG_A(name)                                                           \
  {                                                                            \
    #name, { name##_parse, name##_state_match }                                \
  }

-template <typename T>
-inline std::shared_ptr<T> ensure_state(std::shared_ptr<T> state) {
-  using U = typename T::full_state_type;
-  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;
+template <typename B, typename A>
+std::unique_ptr<B> static_unique_ptr_cast(std::unique_ptr<A> &&p) {
+  return std::unique_ptr<B>(static_cast<B *>(p.release()));
 }

 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::vector<Token> *tokens, std::shared_ptr<void> in_state,
+    std::tuple<std::unique_ptr<StateBase> (*)(
+                   std::vector<Token> *tokens, StateBase *in_state,
                   const char *text, uint32_t len, uint32_t line_num),
-               bool (*)(std::shared_ptr<void> state_1,
-                        std::shared_ptr<void> state_2)>>
+               bool (*)(StateBase *state_1, StateBase *state_2)>>
    parsers = {
        LANG_A(ruby),
        LANG_A(bash),
--- a/include/syntax/line_map.h
+++ b/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
--- a/include/syntax/line_tree.h
+++ b/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
--- a/include/syntax/parser.h
+++ b/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::shared_ptr<void> in_state,
+  std::unique_ptr<StateBase> (*parse_func)(std::vector<Token> *tokens,
+                                           StateBase *in_state,
                                           const char *text, uint32_t len,
                                           uint32_t line_num);
-  bool (*state_match_func)(std::shared_ptr<void> state_1,
-                           std::shared_ptr<void> state_2);
+  bool (*state_match_func)(StateBase *state_1, StateBase *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;
-  UniqueQueue<uint32_t> dirty_lines;
+  LineMap line_map = LineMap();

  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);
--- a/include/ui/diagnostics.h
+++ b/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
--- a/include/utils/utils.h
+++ b/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;
--- a/include/windows/decl.h
+++ b/include/windows/decl.h
@@ -22,6 +22,12 @@ struct Window : Tile {
  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;
@@ -82,11 +88,12 @@ struct TileBlock : Tile {
  }
 };

-struct TileRoot {
+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;
@@ -97,22 +104,14 @@ struct TileRoot {
    event.mouse_y -= this->pos.row;
    this->tile->handle_click(event, size);
  }
-  bool inside(uint32_t x, uint32_t y) {
-    return x >= pos.col && x < pos.col + size.col && y >= pos.row &&
-           y < pos.row + size.row;
-  }
 };

-extern TileRoot root_tile;
-extern std::vector<std::unique_ptr<TileRoot>> popups;
+namespace layout {
+extern TileBase root_tile;
 extern Window *focused_window;
-
-inline void close_popup(TileRoot *handle) {
-  auto it = std::find_if(popups.begin(), popups.end(),
-                         [handle](const auto &p) { return p.get() == handle; });
-  if (it != popups.end())
-    popups.erase(it);
-}
+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);
--- a/samples/ruby.rb
+++ b/samples/ruby.rb
@@ -339,6 +339,5 @@ puts 'Ruby syntax highlighting test complete.'

 __END__

-
 Anything here should be ignored >><<
 {{{}}}[[[]]](((000)))
--- a/src/editor/click.cc
+++ b/src/editor/click.cc
@@ -1,13 +1,10 @@
 #include "editor/editor.h"
-#include "main.h"

 Coord Editor::click_coord(uint32_t x, uint32_t y) {
-  if (mode == INSERT)
-    x++;
  uint32_t numlen =
      EXTRA_META + static_cast<int>(std::log10(this->root->line_count + 1));
  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 = this->scroll.row;
--- a/src/editor/edit.cc
+++ b/src/editor/edit.cc
@@ -232,8 +232,6 @@ void Editor::edit_replace(Coord start, Coord end, const char *text,
  for (uint32_t i = 0; i < len; i++)
    if (text[i] == '\n')
      rows++;
-  if (rows > 0)
-    rows--;
  if (this->parser)
    this->parser->edit(start.row, end.row - start.row, rows);
  auto lsp = this->lsp.load();
--- a/src/editor/events.cc
+++ b/src/editor/events.cc
@@ -6,8 +6,8 @@

 void Editor::handle_event(KeyEvent event) {
  uint8_t old_mode = mode;
-  if (this->hover_active)
-    this->hover_active = false;
+  if (!this->hover_popup->hidden)
+    this->hover_popup->hidden = true;
  if (event.key_type == KEY_SPECIAL) {
    switch (event.special_modifier) {
    case 0:
@@ -67,12 +67,12 @@ void Editor::handle_event(KeyEvent event) {
        this->select_all();
        break;
      case CTRL('h'):
-        static_cast<HoverBox *>(ui::hover_popup->tile.get())->scroll(-1);
-        this->hover_active = true;
+        this->hover_popup->scroll(-1);
+        this->hover_popup->hidden = false;
        break;
      case CTRL('l'):
-        static_cast<HoverBox *>(ui::hover_popup->tile.get())->scroll(1);
-        this->hover_active = true;
+        this->hover_popup->scroll(1);
+        this->hover_popup->hidden = false;
        break;
      case 'h':
        this->fetch_lsp_hover();
--- a/src/editor/helpers.cc
+++ b/src/editor/helpers.cc
@@ -410,11 +410,10 @@ void Editor::fetch_lsp_hover() {
          hover_text += contents.get<std::string>();
        }
        if (!hover_text.empty()) {
-          auto hover_box = static_cast<HoverBox *>(ui::hover_popup->tile.get());
-          hover_box->clear();
-          hover_box->text = clean_text(hover_text);
-          hover_box->is_markup = is_markup;
-          message.editor->hover_active = true;
+          message.editor->hover_popup->clear();
+          message.editor->hover_popup->text = clean_text(hover_text);
+          message.editor->hover_popup->is_markup = is_markup;
+          message.editor->hover_popup->hidden = false;
        }
      }
    };
@@ -423,12 +422,14 @@ void Editor::fetch_lsp_hover() {
 }

 void Editor::handle_click(KeyEvent event, Coord size) {
-  focused_window = this;
+  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>(
--- a/src/editor/renderer.cc
+++ b/src/editor/renderer.cc
@@ -31,7 +31,7 @@ void Editor::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
        return (int)token.type;
    return 0;
  };
-  Coord screen = get_size();
+  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) {
@@ -115,12 +115,8 @@ void Editor::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
  while (rendered_rows < this->size.row) {
    uint32_t line_len;
    char *line = next_line(it, &line_len);
-    if (this->parser) {
-      if (line_data)
-        line_data = this->parser->line_tree.next();
-      else
-        line_data = this->parser->line_tree.start_iter(line_index);
-    }
+    if (this->parser)
+      line_data = this->parser->line_map.at(line_index);
    if (!line)
      break;
    if (line_len > 0 && line[line_len - 1] == '\n')
@@ -471,14 +467,10 @@ void Editor::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
      break;
    }
    set_cursor(cursor.row, cursor.col, type, true);
-    // if (this->completion.active && !this->completion.box.hidden)
-    //   this->completion.box.render(cursor);
-    // else if (this->hover_active)
-    //   this->hover.render(cursor);
-    // else if (this->diagnostics_active)
-    //   this->diagnostics.render(cursor);
-    if (this->hover_active)
-      ui::hover_popup->pos = cursor;
+    if (!this->hover_popup->hidden)
+      this->hover_popup->pos = cursor;
+    if (!this->diagnostic_popup->hidden)
+      this->diagnostic_popup->pos = cursor;
  }
  free(it->buffer);
  free(it);
--- a/src/editor/worker.cc
+++ b/src/editor/worker.cc
@@ -1,36 +1,33 @@
 #include "editor/editor.h"

-// void hover_diagnostic(Editor *editor) {
-//   static uint32_t last_line = UINT32_MAX;
-//   if (last_line == editor->cursor.row && !editor->warnings_dirty)
-//     return;
-//   VWarn dummy;
-//   dummy.line = editor->cursor.row;
-//   editor->warnings_dirty = false;
-//   last_line = editor->cursor.row;
-//   auto first =
-//       std::lower_bound(editor->warnings.begin(), editor->warnings.end(),
-//       dummy);
-//   auto last =
-//       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;
-//     return;
-//   }
-//   editor->diagnostics.clear();
-//   editor->diagnostics.warnings.swap(warnings_at_line);
-//   editor->diagnostics.render_first();
-//   editor->diagnostics_active = true;
-// }
+void hover_diagnostic(Editor *editor) {
+  static uint32_t last_line = UINT32_MAX;
+  if (last_line == editor->cursor.row && !editor->warnings_dirty)
+    return;
+  VWarn dummy;
+  dummy.line = editor->cursor.row;
+  editor->warnings_dirty = false;
+  last_line = editor->cursor.row;
+  auto first =
+      std::lower_bound(editor->warnings.begin(), editor->warnings.end(), dummy);
+  auto last =
+      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->diagnostic_popup->hidden = true;
+    return;
+  }
+  editor->diagnostic_popup->clear();
+  editor->diagnostic_popup->warnings.swap(warnings_at_line);
+  editor->diagnostic_popup->hidden = false;
+}

 void Editor::work() {
  if (!this->root)
    return;
  if (this->parser)
    this->parser->work();
-  // hover_diagnostic(this);
+  hover_diagnostic(this);
  // if (this->completion.active && this->completion.hover_dirty) {
  //   this->completion.hover.render_first();
  //   this->completion.hover_dirty = false;
--- a/src/extentions/diagnostics.cc
+++ b/src/extentions/diagnostics.cc
@@ -0,0 +1,187 @@
+#include "extentions/diagnostics.h"
+#include <cstdint>
+
+DiagnosticBox *init_diagnostic() {
+  auto diagnostic = std::make_unique<DiagnosticBox>();
+  diagnostic->pos = {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(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();
+  for (auto &warn : warnings) {
+    uint32_t longest = 0;
+    uint32_t cur = 0;
+    for (char ch : warn.text_full)
+      if (ch == '\n') {
+        longest = MAX(longest, cur);
+        cur = 0;
+      } else {
+        if (ch == '\t')
+          cur += 3;
+        ++cur;
+      }
+    longest = MAX(longest, cur);
+    longest_line = MAX(longest_line, longest + 7);
+    longest_line = MAX(longest_line, (uint32_t)warn.code.length() + 4);
+    for (auto &see_also : warn.see_also)
+      longest_line = MAX(longest_line, (uint32_t)see_also.length() + 4);
+  }
+  uint32_t content_width = MIN(longest_line, 150u);
+  size.col = content_width + 2;
+  auto set = [&](uint32_t r, uint32_t c, std::string text, uint32_t fg,
+                 uint32_t bg, uint8_t flags, uint32_t width) {
+    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 = 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: ";
+    uint32_t i = 0;
+    for (; i < 8 && i < content_width; i++)
+      set(1, i + 1, (char[2]){src_txt[i], 0}, 0x3EAAFF, base_bg, 0, 1);
+    for (; i < 8 + warnings[0].source.length() && i < content_width; i++)
+      set(1, i + 1, (char[2]){warnings[0].source[i - 8], 0}, 0xffffff, base_bg,
+          0, 1);
+    while (i < content_width)
+      set(1, ++i, " ", 0xffffff, base_bg, 0, 1);
+    r++;
+  }
+  int idx = 1;
+  for (auto &warn : warnings) {
+    char buf[4];
+    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, 1);
+    if (r >= 23)
+      break;
+    const char *err_sym = "";
+    uint32_t c_sym = 0xAAAAAA;
+    switch (warn.type) {
+    case 1:
+      err_sym = "";
+      c_sym = 0xFF0000;
+      break;
+    case 2:
+      err_sym = "";
+      c_sym = 0xFFFF00;
+      break;
+    case 3:
+      err_sym = "";
+      c_sym = 0xFF00FF;
+      break;
+    case 4:
+      err_sym = "";
+      c_sym = 0xAAAAAA;
+      break;
+    }
+    std::string text = warn.text_full + " " + err_sym;
+    uint32_t i = 0;
+    while (i < text.length() && r < 23) {
+      uint32_t c = 4;
+      while (c < content_width && i < text.length()) {
+        if (text[i] == '\n') {
+          while (i < text.length() && text[i] == '\n')
+            i++;
+          break;
+        }
+        uint32_t cluster_len = grapheme_next_character_break_utf8(
+            text.c_str() + i, text.length() - i);
+        std::string cluster = text.substr(i, cluster_len);
+        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, 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, 0);
+      }
+      while (c < content_width)
+        set(r + 1, ++c, " ", 0xffffff, base_bg, 0, 1);
+      r++;
+    }
+    if (r >= 23)
+      break;
+    if (warn.code != "") {
+      uint32_t i = 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)
+      break;
+    for (std::string &see_also : warn.see_also) {
+      uint32_t fg = 0xB55EFF;
+      uint8_t colon_count = 0;
+      uint32_t i = 0;
+      for (; i < 5 && i < content_width; i++)
+        set(r + 1, i, " ", 0x81cdc6, base_bg, 0, 1);
+      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] == ':')
+          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;
+    };
+    idx++;
+  }
+  size.row = 2 + r;
+  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, 1);
+  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, 1);
+    set(r, size.col - 1, "│", border_fg, base_bg, 0, 1);
+  }
+  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, 1);
+  set(size.row - 1, size.col - 1, "┘", border_fg, base_bg, 0, 1);
+}
--- a/src/extentions/hover.cc
+++ b/src/extentions/hover.cc
@@ -1,15 +1,16 @@
 #include "extentions/hover.h"
+#include "io/sysio.h"
 #include "syntax/decl.h"
 #include "windows/decl.h"

-TileRoot *init_hover() {
-  auto root = std::make_unique<TileRoot>();
-  root->tile = std::make_unique<HoverBox>();
-  root->pos = {0, 0};
-  root->size = {1, 1};
-  root->tile->hidden = true;
-  popups.push_back(std::move(root));
-  return popups.back().get();
+HoverBox *init_hover() {
+  auto hover = std::make_unique<HoverBox>();
+  hover->pos = {0, 0};
+  hover->size = {1, 1};
+  hover->hidden = true;
+  HoverBox *ptr = hover.get();
+  layout::popups.push_back(std::move(hover));
+  return ptr;
 }

 void HoverBox::scroll(int32_t number) {
@@ -25,20 +26,25 @@ void HoverBox::scroll(int32_t number) {
  scroll_dirty = true;
 }

-void HoverBox::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
+void HoverBox::render(std::vector<ScreenCell> &buffer, Coord n_size,
+                      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; // pos here is the cursor pos
-  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;
-  // }
+  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++) {
@@ -69,6 +75,8 @@ void HoverBox::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
      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;
@@ -103,6 +111,8 @@ void HoverBox::render(std::vector<ScreenCell> &buffer, Coord size, Coord pos) {
      for (int w = 1; w < width; w++)
        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_dirty)
--- a/src/io/renderer.cc
+++ b/src/io/renderer.cc
@@ -1,15 +1,19 @@
 #include "io/sysio.h"

+namespace io {
 std::vector<ScreenCell> new_screen;
-static uint32_t rows, cols;
-static bool show_cursor = 0;
-static std::vector<ScreenCell> old_screen;
-static termios orig_termios;
+uint32_t rows, cols;
+bool show_cursor = 0;
+std::vector<ScreenCell> old_screen;
+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);
  }
@@ -45,8 +49,6 @@ Coord start_screen() {

 void end_screen() { disable_raw_mode(); }

-Coord get_size() { return {rows, cols}; }
-
 void io_render() {
  static bool first_render = true;
  uint32_t current_fg = 0;
--- a/src/lsp/worker.cc
+++ b/src/lsp/worker.cc
@@ -6,6 +6,7 @@ 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;
 } // namespace lsp

 void lsp_worker() {
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,6 +1,5 @@
 #include "main.h"
 #include "editor/editor.h"
-#include "extentions/hover.h"
 #include "io/sysio.h"
 #include "lsp/lsp.h"
 #include "ruby/decl.h"
@@ -15,7 +14,6 @@ std::atomic<uint8_t> mode = NORMAL;

 namespace ui {
 Bar bar;
-TileRoot *hover_popup = nullptr;
 } // namespace ui

 void background_lsp() {
@@ -33,31 +31,34 @@ int main(int argc, char *argv[]) {
  const char *filename = (argc > 1) ? argv[1] : "";
  uint8_t eol = read_line_endings();

-  ui::hover_popup = init_hover();
+  layout::root_tile.pos = {0, 0};
+  layout::root_tile.size = {screen.row - 2, screen.col - 1};
+  auto editor = std::make_unique<Editor>(filename, eol);
+  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);

-  root_tile.size = {screen.row - 2, screen.col - 1};
-  root_tile.pos = {0, 0};
-
-  root_tile.tile = std::make_unique<Editor>(filename, eol);
-  focused_window = static_cast<Editor *>(root_tile.tile.get());
  ui::bar.init(screen);

  std::thread lsp_thread(background_lsp);

  while (running) {
-    KeyEvent event = throttle(1ms, read_key);
+    uint8_t consumed = 0;
+    KeyEvent event;
+    while (++consumed < 32 && (event = read_key()).key_type != KEY_NONE) {
      if (event.key_type != KEY_NONE) {
        if (event.key_type == KEY_CHAR && event.len == 1 &&
            event.c[0] == CTRL('q')) {
          free(event.c);
          running = false;
-        break;
+          goto quit;
        }
        if (mode != RUNNER) {
          if (event.key_type == KEY_MOUSE) {
            handle_click(event);
          } else {
-          focused_window->handle_event(event);
+            layout::focused_window->handle_event(event);
          }
        } else {
          ui::bar.handle_event(event);
@@ -66,12 +67,17 @@ int main(int argc, char *argv[]) {
            event.c)
          free(event.c);
      }
-    for (auto &lsp_inst : lsp::active_lsps)
-      lsp_inst.second->callbacks();
-    focused_window->work();
-    throttle(4ms, render);
-    throttle(4ms, io_render);
    }
+    std::unique_ptr<LSPMessage> msg;
+    while (lsp::response_queue.pop(msg)) {
+      msg->callback(*msg);
+    };
+    layout::focused_window->work();
+    render();
+    throttle(8ms, io_render);
+  }
+
+quit:

  if (lsp_thread.joinable())
    lsp_thread.join();
--- a/src/syntax/bash.cc
+++ b/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,
-                      std::shared_ptr<void> state_2) {
+bool bash_state_match(StateBase *state_1, StateBase *state_2) {
  if (!state_1 || !state_2)
    return false;
-  return *std::static_pointer_cast<BashState>(state_1) ==
-         *std::static_pointer_cast<BashState>(state_2);
+  return *static_cast<BashState *>(state_1) ==
+         *static_cast<BashState *>(state_2);
 }

-std::shared_ptr<void> bash_parse(std::vector<Token> *tokens,
-                                 std::shared_ptr<void> in_state,
-                                 const char *text, uint32_t len,
-                                 uint32_t line_num) {
+std::unique_ptr<StateBase> bash_parse(std::vector<Token> *tokens,
+                                      StateBase *in_state, const char *text,
+                                      uint32_t len, 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] == ' '))
--- a/src/syntax/parser.cc
+++ b/src/syntax/parser.cc
@@ -26,54 +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_tree.erase(start_line, (uint32_t)(-delta));
-  else if (delta > 0)
-    line_tree.insert(start_line, (uint32_t)delta);
+  line_map.apply_edit(start_line, 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;
-  while (dirty_lines.pop(c_line))
-    batch.push_back(c_line);
-  uint32_t i = MAX(0, (int64_t)scroll_max - 60);
-  LineData *l_iter = line_tree.start_iter(i);
-  while (l_iter && i < scroll_max + 10) {
-    if (!l_iter->out_state)
+  uint32_t line_count = editor->root->line_count + 1;
+  uint32_t min_line =
+      scroll_max > MAX_LINES_LOOKAROUND ? scroll_max - MAX_LINES_LOOKAROUND : 0;
+  uint32_t max_line = MIN(scroll_max + MAX_LINES_LOOKAROUND, line_count - 1);
+  bool sequential = false;
+  for (uint32_t i = min_line; i <= max_line; ++i) {
+    LineData *ld = line_map.at(i);
+    if ((!ld || !ld->in_state || !ld->out_state) && !sequential) {
      batch.push_back(i);
-    i++;
-    l_iter = line_tree.next();
+      sequential = true;
+      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 max_line = scroll_max + 10;
-    if (c_line < min_line || c_line > max_line) {
-      dirty_lines.push(c_line);
+    uint32_t min_line = scroll_max > MAX_LINES_LOOKAROUND
+                            ? scroll_max - MAX_LINES_LOOKAROUND
+                            : 0;
+    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;
-    uint32_t line_count;
-    line_count = line_tree.count();
-    if (c_line > 0 && c_line < line_count)
-      prev_state = line_tree.at(c_line - 1)->out_state;
+    std::unique_ptr<StateBase> prev_state = nullptr;
+    if (c_line > 0 && c_line < line_count) {
+      auto lm = line_map.at(c_line - 1);
+      if (lm && lm->out_state)
+        prev_state = lm->out_state ? lm->out_state->clone() : nullptr;
+    }
    LineIterator *it = begin_l_iter(editor->root, c_line);
    if (!it)
      continue;
@@ -81,60 +82,61 @@ void Parser::work() {
    while (cur_line < line_count) {
      if (!running.load(std::memory_order_relaxed))
        break;
-      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);
+      if (scroll_snapshot != scroll_max)
        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);
-      if (!line_data) {
-        cur_line++;
-        continue;
-      }
-      std::shared_ptr<void> new_state;
+      LineData *line_data = line_map.create_at(cur_line);
+      std::unique_ptr<StateBase> new_state;
      if (is_custom) {
-        std::string state = "";
-        if (prev_state)
-          state = std::static_pointer_cast<std::string>(prev_state)->c_str();
-        std::string out_state = parse_custom(&line_data->tokens, parser_block,
-                                             line, len, state, cur_line);
-        new_state = std::make_shared<std::string>(out_state);
-      } else {
-        new_state =
-            parse_func(&line_data->tokens, prev_state, line, len, cur_line);
+        std::string prev_value = "";
+        if (prev_state) {
+          CustomState *prev_custom =
+              static_cast<CustomState *>(prev_state.get());
+          prev_value = prev_custom->value;
        }
-      line_data->in_state = prev_state;
-      line_data->out_state = new_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 = parse_func(&line_data->tokens, prev_state.get(), line, len,
+                               cur_line);
+      }
+      line_data->in_state = std::move(prev_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 =
-                prev_state
-                    ? std::static_pointer_cast<std::string>(new_state)->c_str()
-                    : "";
-            std::string b = next_line_data->in_state
-                                ? std::static_pointer_cast<std::string>(
-                                      next_line_data->in_state)
-                                      ->c_str()
-                                : "";
+            std::string a = "";
+            if (new_state) {
+              CustomState *cs = static_cast<CustomState *>(new_state.get());
+              a = cs->value;
+            }
+            std::string b = "";
+            if (next_line_data->in_state) {
+              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;
--- a/src/syntax/ruby.cc
+++ b/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::shared_ptr<RubyFullState> full_state;
+  std::stack<RubyFullState> interp_stack;
+  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,
-                      std::shared_ptr<void> state_2) {
+bool ruby_state_match(StateBase *state_1, StateBase *state_2) {
  if (!state_1 || !state_2)
    return false;
-  return *std::static_pointer_cast<RubyState>(state_1) ==
-         *std::static_pointer_cast<RubyState>(state_2);
+  return *static_cast<RubyState *>(state_1) ==
+         *static_cast<RubyState *>(state_2);
 }

-std::shared_ptr<void> ruby_parse(std::vector<Token> *tokens,
-                                 std::shared_ptr<void> in_state,
-                                 const char *text, uint32_t len,
-                                 uint32_t line_num) {
+std::unique_ptr<StateBase> ruby_parse(std::vector<Token> *tokens,
+                                      StateBase *in_state, const char *text,
+                                      uint32_t len, 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 &&
-            state->full_state->lit.delim_start !=
-                state->full_state->lit.delim_end) {
-          state->full_state->lit.brace_level++;
+        if (text[i] == state->full_state.lit.delim_start &&
+            state->full_state.lit.delim_start !=
+                state->full_state.lit.delim_end) {
+          state->full_state.lit.brace_level++;
        }
-        if (text[i] == state->full_state->lit.delim_end) {
-          if (state->full_state->lit.delim_start ==
-              state->full_state->lit.delim_end) {
+        if (text[i] == state->full_state.lit.delim_end) {
+          if (state->full_state.lit.delim_start ==
+              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->expecting_expr = false;
+            state->full_state.in_state = RubyFullState::NONE;
+            state->full_state.expecting_expr = false;
            break;
          } else {
-            state->full_state->lit.brace_level--;
-            if (state->full_state->lit.brace_level == 0) {
+            state->full_state.lit.brace_level--;
+            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->expecting_expr = false;
+              state->full_state.in_state = RubyFullState::NONE;
+              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 &&
-            state->full_state->lit.delim_start !=
-                state->full_state->lit.delim_end) {
-          state->full_state->lit.brace_level++;
+        if (text[i] == state->full_state.lit.delim_start &&
+            state->full_state.lit.delim_start !=
+                state->full_state.lit.delim_end) {
+          state->full_state.lit.brace_level++;
        }
-        if (text[i] == state->full_state->lit.delim_end) {
-          if (state->full_state->lit.delim_start ==
-              state->full_state->lit.delim_end) {
+        if (text[i] == state->full_state.lit.delim_end) {
+          if (state->full_state.lit.delim_start ==
+              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->expecting_expr = false;
+            state->full_state.in_state = RubyFullState::NONE;
+            state->full_state.expecting_expr = false;
            break;
          } else {
-            state->full_state->lit.brace_level--;
-            if (state->full_state->lit.brace_level == 0) {
+            state->full_state.lit.brace_level--;
+            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->expecting_expr = false;
+              state->full_state.in_state = RubyFullState::NONE;
+              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->expecting_expr = false;
+        state->full_state.in_state = RubyFullState::COMMENT;
+        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->expecting_expr = false;
+        state->full_state.in_state = RubyFullState::END;
+        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->expecting_expr = false;
-      state->full_state->lit.delim_start = '/';
-      state->full_state->lit.delim_end = '/';
-      state->full_state->lit.allow_interp = true;
+      state->full_state.in_state = RubyFullState::REGEXP;
+      state->full_state.expecting_expr = false;
+      state->full_state.lit.delim_start = '/';
+      state->full_state.lit.delim_end = '/';
+      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->brace_level--;
+      state->full_state.expecting_expr = false;
+      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->brace_level--;
+      state->full_state.expecting_expr = false;
+      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->lit.delim_start = '\'';
-      state->full_state->lit.delim_end = '\'';
-      state->full_state->lit.allow_interp = false;
+      state->full_state.in_state = RubyFullState::STRING;
+      state->full_state.lit.delim_start = '\'';
+      state->full_state.lit.delim_end = '\'';
+      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->lit.delim_start = '"';
-      state->full_state->lit.delim_end = '"';
-      state->full_state->lit.allow_interp = true;
+      state->full_state.in_state = RubyFullState::STRING;
+      state->full_state.lit.delim_start = '"';
+      state->full_state.lit.delim_end = '"';
+      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->lit.delim_start = '`';
-      state->full_state->lit.delim_end = '`';
-      state->full_state->lit.allow_interp = true;
+      state->full_state.in_state = RubyFullState::STRING;
+      state->full_state.lit.delim_start = '`';
+      state->full_state.lit.delim_end = '`';
+      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_end = delim_end;
-      state->full_state->lit.allow_interp = allow_interp;
-      state->full_state->lit.brace_level = 1;
+      state->full_state.lit.delim_start = delim_start;
+      state->full_state.lit.delim_end = delim_end;
+      state->full_state.lit.allow_interp = allow_interp;
+      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]);
--- a/src/ui/bar.cc
+++ b/src/ui/bar.cc
@@ -10,7 +10,8 @@ void Bar::log(std::string message) { log_line = message; }
 void Bar::render(std::vector<ScreenCell> &buffer) {
  USING(LSPInstance);
  BarLine bar_line;
-  bar_line = bar_contents(mode, screen.col, pwd.string(), focused_window);
+  bar_line =
+      bar_contents(mode, screen.col, pwd.string(), layout::focused_window);
  auto update = [&](uint32_t row, uint32_t col, std::string text, uint32_t fg,
                    uint32_t bg, uint8_t flags, uint32_t width) {
    ScreenCell &c = buffer[row * screen.col + col];
@@ -61,8 +62,8 @@ void Bar::handle_command(std::string &command) {
    running = false;
    return;
  }
-  if (focused_window)
-    focused_window->handle_command(command);
+  if (layout::focused_window)
+    layout::focused_window->handle_command(command);
 }

 void Bar::handle_event(KeyEvent event) {
--- a/src/ui/diagnostics.cc
+++ b/src/ui/diagnostics.cc
@@ -1,164 +0,0 @@
-// #include "ui/diagnostics.h"
-//
-// void DiagnosticBox::clear() {
-//   warnings.clear();
-//   cells.clear();
-//   size = {0, 0};
-// };
-//
-// void DiagnosticBox::render_first() {
-//   if (warnings.empty())
-//     return;
-//   uint32_t longest_line = 8 + warnings[0].source.length();
-//   for (auto &warn : warnings) {
-//     uint32_t longest = 0;
-//     uint32_t cur = 0;
-//     for (char ch : warn.text_full)
-//       if (ch == '\n') {
-//         longest = MAX(longest, cur);
-//         cur = 0;
-//       } else {
-//         if (ch == '\t')
-//           cur += 3;
-//         ++cur;
-//       }
-//     longest = MAX(longest, cur);
-//     longest_line = MAX(longest_line, longest + 7);
-//     longest_line = MAX(longest_line, (uint32_t)warn.code.length() + 4);
-//     for (auto &see_also : warn.see_also)
-//       longest_line = MAX(longest_line, (uint32_t)see_also.length() + 4);
-//   }
-//   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, const char *text, uint32_t fg,
-//                  uint32_t bg, uint8_t flags) {
-//     cells[r * size.col + c] = {std::string(text), 0, fg, bg, flags, 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++)
-//       set(1, i + 1, (char[2]){src_txt[i], 0}, 0x3EAAFF, base_bg, 0);
-//     for (uint32_t i = 0; i < warnings[0].source.length() && i <
-//     content_width;
-//          i++)
-//       set(1, i + 1 + src_txt.length(), (char[2]){warnings[0].source[i], 0},
-//           0xffffff, base_bg, 0);
-//     r++;
-//   }
-//   int idx = 1;
-//   for (auto &warn : warnings) {
-//     char buf[4];
-//     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);
-//     if (r >= 23)
-//       break;
-//     const char *err_sym = "";
-//     uint32_t c_sym = 0xAAAAAA;
-//     switch (warn.type) {
-//     case 1:
-//       err_sym = "";
-//       c_sym = 0xFF0000;
-//       break;
-//     case 2:
-//       err_sym = "";
-//       c_sym = 0xFFFF00;
-//       break;
-//     case 3:
-//       err_sym = "";
-//       c_sym = 0xFF00FF;
-//       break;
-//     case 4:
-//       err_sym = "";
-//       c_sym = 0xAAAAAA;
-//       break;
-//     }
-//     std::string text = warn.text_full + " " + err_sym;
-//     uint32_t i = 0;
-//     while (i < text.length() && r < 23) {
-//       uint32_t c = 4;
-//       while (c < content_width && i < text.length()) {
-//         if (text[i] == '\n') {
-//           while (i < text.length() && text[i] == '\n')
-//             i++;
-//           break;
-//         }
-//         uint32_t cluster_len = grapheme_next_character_break_utf8(
-//             text.c_str() + i, text.length() - i);
-//         std::string cluster = text.substr(i, cluster_len);
-//         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);
-//         c += width;
-//         i += cluster_len;
-//         for (int w = 1; w < width; w++)
-//           set(r + 1, c - w + 1, "\x1b", c_sym, base_bg, 0);
-//       }
-//       r++;
-//     }
-//     if (r >= 23)
-//       break;
-//     if (warn.code != "") {
-//       for (uint32_t i = 0; i < warn.code.length() && i + 5 < content_width;
-//       i++)
-//         set(r + 1, i + 5, (char[2]){warn.code[i], 0}, 0x81cdc6, base_bg, 0);
-//       r++;
-//     }
-//     if (r >= 23)
-//       break;
-//     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;
-//            i++) {
-//         set(r + 1, i + 5, (char[2]){see_also[i], 0}, fg, base_bg, 0);
-//         if (see_also[i] == ':')
-//           colon_count++;
-//         if (colon_count == 2)
-//           fg = 0xFFFFFF;
-//       }
-//       r++;
-//       if (r >= 23)
-//         break;
-//     };
-//     idx++;
-//   }
-//   size.row = 2 + r;
-//   set(0, 0, "┌", border_fg, base_bg, 0);
-//   for (uint32_t i = 1; i < size.col - 1; i++)
-//     set(0, i, "─", border_fg, base_bg, 0);
-//   set(0, size.col - 1, "┐", border_fg, base_bg, 0);
-//   for (uint32_t r = 1; r < size.row - 1; r++) {
-//     set(r, 0, "│", border_fg, base_bg, 0);
-//     set(r, size.col - 1, "│", border_fg, base_bg, 0);
-//   }
-//   set(size.row - 1, 0, "└", border_fg, base_bg, 0);
-//   for (uint32_t i = 1; i < size.col - 1; i++)
-//     set(size.row - 1, i, "─", border_fg, base_bg, 0);
-//   set(size.row - 1, size.col - 1, "┘", border_fg, base_bg, 0);
-//   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);
-// }
--- a/src/windows/renderer.cc
+++ b/src/windows/renderer.cc
@@ -1,23 +1,49 @@
+#include "io/sysio.h"
 #include "main.h"
 #include "windows/decl.h"

-TileRoot root_tile;
-std::vector<std::unique_ptr<TileRoot>> popups;
+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(new_screen);
-  root_tile.render(new_screen);
-  for (auto &popup : popups)
-    popup->render(new_screen);
+  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 : popups) {
-    if (popup->inside(event.mouse_x, event.mouse_y)) {
-      popup->handle_click(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;
    }
  }
-  root_tile.handle_click(event);
+  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);
 }
Author	SHA1	Message	Date
Syed Daanish	c683754d49	Cleanup / optimizations	2026-02-12 01:01:52 +00:00
Syed Daanish	e9d164d769	Rewrite diagnostics popup with new api	2026-02-11 19:51:45 +00:00
Syed Daanish	5b66f503e4	Improve highlighting structure - switched to a sparse delta based map - true lazy-loading to avoid any unneccessary allocations - fixed windows management api	2026-02-11 18:18:28 +00:00
Syed Daanish	d79ea4e75a	Fix parser bug on newlines	2026-02-05 14:23:52 +00:00