Add basic modes and mode-navigation

README.md

@@ -6,10 +6,9 @@ A TUI IDE.
 
 # TODO
 
-- [ ] Make function to get selected text. (selection itself is done)
-- [ ] Add modes for editing - insert, select, normal, etc.
 - [ ] Add line numbers.
 - [ ] Add bg highlight for current line.
+- [ ] Make function to get selected text. (selection itself is done)
 - [ ] Add support for copy/cut/paste.
 - [ ] Add support for ctrl + arrow key for moving words.
 - [ ] Add support for ctrl + backspace / delete for deleting words.
@@ -26,3 +25,4 @@ A TUI IDE.
 - [ ] Add `.scm` files for all the supported languages. (2/14) Done.
 - [ ] Add support for LSP & autocomplete / snippets.
 - [ ] Add codeium/copilot support.
+- [ ] Add git stuff.

include/main.h

@@ -0,0 +1,14 @@
+#ifndef MAIN_H
+#define MAIN_H
+
+#include <atomic>
+#include <vector>
+
+#define NORMAL 0
+#define INSERT 1
+#define SELECT 2
+#define RUNNER 3
+
+extern std::atomic<bool> running;
+
+#endif

include/ui.h

@@ -54,7 +54,7 @@ enum CellFlags : uint8_t {
 };
 
 struct ScreenCell {
-  std::string utf8 = std::string(""); // empty => no content
+  std::string utf8 = std::string("");
   uint32_t fg = 0;
   uint32_t bg = 0;
   uint8_t flags = CF_NONE;
@@ -63,7 +63,8 @@ struct ScreenCell {
 struct KeyEvent {
   uint8_t key_type;
 
-  char c;
+  char *c;
+  uint32_t len;
 
   uint8_t special_key;
   uint8_t special_modifier;
@@ -77,10 +78,9 @@ struct KeyEvent {
 };
 
 extern uint32_t rows, cols;
-extern std::vector<ScreenCell> screen; // size rows*cols
+extern std::vector<ScreenCell> screen;
 extern std::vector<ScreenCell> old_screen;
 extern std::mutex screen_mutex;
-extern std::atomic<bool> running;
 
 Coord start_screen();
 void end_screen();
@@ -90,7 +90,6 @@ void set_cursor(int row, int col, int show_cursor_param);
 void render();
 Coord get_size();
 
-int read_input(char *buf, size_t buflen);
 KeyEvent read_key();
 
 #endif

src/editor.cc

@@ -4,7 +4,6 @@ extern "C" {
 #include "../include/editor.h"
 #include "../include/ts.h"
 #include "../include/utils.h"
-#include <cstdint>
 
 Editor *new_editor(const char *filename, Coord position, Coord size) {
   Editor *editor = new Editor();
@@ -28,7 +27,7 @@ Editor *new_editor(const char *filename, Coord position, Coord size) {
   editor->root = load(str, len, optimal_chunk_size(len));
   free(str);
   editor->folded.resize(editor->root->line_count + 2);
-  if (len < (1024 * 128)) {
+  if (len <= (1024 * 128)) {
     editor->parser = ts_parser_new();
     Language language = language_for_file(filename);
     editor->language = language.fn();
@@ -49,296 +48,6 @@ void free_editor(Editor *editor) {
   delete editor;
 }
 
-void cursor_down(Editor *editor, uint32_t number) {
-  if (!editor || !editor->root || number == 0)
-    return;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
-  uint32_t len;
-  char *line_content = next_line(it, &len);
-  if (line_content == nullptr)
-    return;
-  if (editor->cursor_preffered == UINT32_MAX)
-    editor->cursor_preffered =
-        get_visual_col_from_bytes(line_content, len, editor->cursor.col);
-  uint32_t visual_col = editor->cursor_preffered;
-  do {
-    free(line_content);
-    line_content = next_line(it, &len);
-    editor->cursor.row += 1;
-    if (editor->cursor.row >= editor->root->line_count) {
-      editor->cursor.row = editor->root->line_count - 1;
-      break;
-    };
-    if (editor->folded[editor->cursor.row] != 0)
-      number++;
-  } while (--number > 0);
-  free(it);
-  if (line_content == nullptr)
-    return;
-  editor->cursor.col = get_bytes_from_visual_col(line_content, len, visual_col);
-  free(line_content);
-}
-
-void cursor_up(Editor *editor, uint32_t number) {
-  if (!editor || !editor->root || number == 0)
-    return;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
-  uint32_t len;
-  char *line_content = next_line(it, &len);
-  if (!line_content) {
-    free(it);
-    return;
-  }
-  if (editor->cursor_preffered == UINT32_MAX)
-    editor->cursor_preffered =
-        get_visual_col_from_bytes(line_content, len, editor->cursor.col);
-  uint32_t visual_col = editor->cursor_preffered;
-  free(line_content);
-  while (number > 0 && editor->cursor.row > 0) {
-    editor->cursor.row--;
-    if (editor->folded[editor->cursor.row] != 0)
-      continue;
-    number--;
-  }
-  free(it);
-  it = begin_l_iter(editor->root, editor->cursor.row);
-  line_content = next_line(it, &len);
-  if (!line_content) {
-    free(it);
-    return;
-  }
-  editor->cursor.col = get_bytes_from_visual_col(line_content, len, visual_col);
-  free(line_content);
-  free(it);
-}
-
-void cursor_right(Editor *editor, uint32_t number) {
-  if (!editor || !editor->root || number == 0)
-    return;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
-  uint32_t line_len;
-  char *line = next_line(it, &line_len);
-  free(it);
-  if (!line)
-    return;
-  if (line[line_len - 1] == '\n')
-    --line_len;
-  while (number > 0) {
-    if (editor->cursor.col >= line_len) {
-      free(line);
-      line = nullptr;
-      uint32_t next_row = editor->cursor.row + 1;
-      while (next_row < editor->root->line_count &&
-             editor->folded[next_row] != 0)
-        next_row++;
-      if (next_row >= editor->root->line_count) {
-        editor->cursor.col = line_len;
-        break;
-      }
-      editor->cursor.row = next_row;
-      editor->cursor.col = 0;
-      it = begin_l_iter(editor->root, editor->cursor.row);
-      line = next_line(it, &line_len);
-      free(it);
-      if (!line)
-        break;
-      if (line[line_len - 1] == '\n')
-        --line_len;
-    } else {
-      uint32_t inc = grapheme_next_character_break_utf8(
-          line + editor->cursor.col, line_len - editor->cursor.col);
-      if (inc == 0)
-        break;
-      editor->cursor.col += inc;
-    }
-    number--;
-  }
-  LineIterator *it2 = begin_l_iter(editor->root, editor->cursor.row);
-  uint32_t len2;
-  char *cur_line = next_line(it2, &len2);
-  free(it2);
-  if (cur_line) {
-    if (len2 > 0 && cur_line[len2 - 1] == '\n')
-      --len2;
-    editor->cursor_preffered =
-        get_visual_col_from_bytes(cur_line, len2, editor->cursor.col);
-    free(cur_line);
-  } else {
-    editor->cursor_preffered = UINT32_MAX;
-  }
-  if (line)
-    free(line);
-}
-
-void cursor_left(Editor *editor, uint32_t number) {
-  if (!editor || !editor->root || number == 0)
-    return;
-  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
-  uint32_t len;
-  char *line = next_line(it, &len);
-  free(it);
-  if (!line)
-    return;
-  if (line[len - 1] == '\n')
-    line[--len] = '\0';
-  while (number > 0) {
-    if (editor->cursor.col == 0) {
-      free(line);
-      line = nullptr;
-      if (editor->cursor.row == 0)
-        break;
-      int32_t prev_row = editor->cursor.row - 1;
-      while (prev_row >= 0 && editor->folded[prev_row] != 0)
-        prev_row--;
-      if (prev_row < 0)
-        break;
-      editor->cursor.row = prev_row;
-      it = begin_l_iter(editor->root, editor->cursor.row);
-      line = next_line(it, &len);
-      free(it);
-      if (!line)
-        break;
-      if (line[len - 1] == '\n')
-        --len;
-      editor->cursor.col = len;
-    } else {
-      uint32_t col = editor->cursor.col;
-      uint32_t new_col = 0;
-      uint32_t visual_col = 0;
-      while (new_col < col) {
-        uint32_t inc =
-            grapheme_next_character_break_utf8(line + new_col, len - new_col);
-        if (new_col + inc >= col)
-          break;
-        new_col += inc;
-        visual_col++;
-      }
-      editor->cursor.col = new_col;
-    }
-    number--;
-  }
-  LineIterator *it2 = begin_l_iter(editor->root, editor->cursor.row);
-  uint32_t len2;
-  char *cur_line = next_line(it2, &len2);
-  free(it2);
-  if (cur_line) {
-    if (len2 > 0 && cur_line[len2 - 1] == '\n')
-      --len2;
-    editor->cursor_preffered =
-        get_visual_col_from_bytes(cur_line, len2, editor->cursor.col);
-    free(cur_line);
-  } else {
-    editor->cursor_preffered = UINT32_MAX;
-  }
-  if (line)
-    free(line);
-}
-
-Coord simulate_cursor_right(Editor *editor, Coord cursor, uint32_t number) {
-  Coord result = cursor;
-  if (!editor || !editor->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);
-  char *line = next_line(it, &line_len);
-  free(it);
-  if (!line)
-    return result;
-  if (line_len > 0 && line[line_len - 1] == '\n')
-    --line_len;
-  while (number > 0) {
-    if (col >= line_len) {
-      free(line);
-      line = nullptr;
-      uint32_t next_row = row + 1;
-      while (next_row < editor->root->line_count &&
-             editor->folded[next_row] != 0)
-        next_row++;
-      if (next_row >= editor->root->line_count) {
-        col = line_len;
-        break;
-      }
-      row = next_row;
-      col = 0;
-      it = begin_l_iter(editor->root, row);
-      line = next_line(it, &line_len);
-      free(it);
-      if (!line)
-        break;
-      if (line_len > 0 && line[line_len - 1] == '\n')
-        --line_len;
-    } else {
-      uint32_t inc =
-          grapheme_next_character_break_utf8(line + col, line_len - col);
-      if (inc == 0)
-        break;
-      col += inc;
-    }
-    number--;
-  }
-  if (line)
-    free(line);
-  result.row = row;
-  result.col = col;
-  return result;
-}
-
-Coord simulate_cursor_left(Editor *editor, Coord cursor, uint32_t number) {
-  Coord result = cursor;
-  if (!editor || !editor->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);
-  char *line = next_line(it, &len);
-  free(it);
-  if (!line)
-    return result;
-  if (len > 0 && line[len - 1] == '\n')
-    --len;
-  while (number > 0) {
-    if (col == 0) {
-      free(line);
-      line = nullptr;
-      if (row == 0)
-        break;
-      int32_t prev_row = row - 1;
-      while (prev_row >= 0 && editor->folded[prev_row] != 0)
-        prev_row--;
-      if (prev_row < 0)
-        break;
-      row = prev_row;
-      it = begin_l_iter(editor->root, row);
-      line = next_line(it, &len);
-      free(it);
-      if (!line)
-        break;
-      if (len > 0 && line[len - 1] == '\n')
-        --len;
-      col = len;
-    } else {
-      uint32_t new_col = 0;
-      while (new_col < col) {
-        uint32_t inc =
-            grapheme_next_character_break_utf8(line + new_col, len - new_col);
-        if (new_col + inc >= col)
-          break;
-        new_col += inc;
-      }
-      col = new_col;
-    }
-    number--;
-  }
-  if (line)
-    free(line);
-  result.row = row;
-  result.col = col;
-  return result;
-}
-
 void ensure_scroll(Editor *editor) {
   std::shared_lock knot_lock(editor->knot_mtx);
   if (editor->cursor.row < editor->scroll.row ||
@@ -522,175 +231,6 @@ void apply_edit(std::vector<Span> &spans, uint32_t x, int64_t y) {
   }
 }
 
-void edit_erase(Editor *editor, 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) +
-        editor->cursor.col;
-    TSPoint old_point = {pos.row, pos.col};
-    uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
-    Coord point = simulate_cursor_left(editor, pos, -len);
-    uint32_t start = line_to_byte(editor->root, point.row, nullptr) + point.col;
-    if (cursor_original > start && cursor_original <= byte_pos) {
-      editor->cursor = point;
-      LineIterator *it = begin_l_iter(editor->root, point.row);
-      if (!it)
-        return;
-      uint32_t line_len;
-      char *line = next_line(it, &line_len);
-      free(it);
-      if (!line)
-        return;
-      editor->cursor_preffered =
-          get_visual_col_from_bytes(line, line_len, point.col);
-      free(line);
-    } 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);
-      editor->cursor = {new_row, new_col};
-      LineIterator *it = begin_l_iter(editor->root, new_row);
-      if (!it)
-        return;
-      uint32_t line_len;
-      char *line = next_line(it, &line_len);
-      free(it);
-      if (!line)
-        return;
-      editor->cursor_preffered =
-          get_visual_col_from_bytes(line, line_len, new_col);
-      free(line);
-    }
-    lock_1.unlock();
-    std::unique_lock lock_2(editor->knot_mtx);
-    editor->root = erase(editor->root, start, byte_pos - start);
-    lock_2.unlock();
-    if (editor->tree) {
-      TSInputEdit edit = {
-          .start_byte = start,
-          .old_end_byte = byte_pos,
-          .new_end_byte = start,
-          .start_point = {point.row, point.col},
-          .old_end_point = old_point,
-          .new_end_point = {point.row, point.col},
-      };
-      editor->edit_queue.push(edit);
-    }
-    std::unique_lock lock_3(editor->spans.mtx);
-    apply_edit(editor->spans.spans, start, start - byte_pos);
-    if (editor->spans.mid_parse)
-      editor->spans.edits.push({start, start - byte_pos});
-  } else {
-    std::shared_lock lock_1(editor->knot_mtx);
-    uint32_t cursor_original =
-        line_to_byte(editor->root, editor->cursor.row, nullptr) +
-        editor->cursor.col;
-    TSPoint old_point = {pos.row, pos.col};
-    uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
-    Coord point = simulate_cursor_right(editor, pos, len);
-    uint32_t end = line_to_byte(editor->root, point.row, nullptr) + point.col;
-    if (cursor_original > byte_pos && cursor_original <= end) {
-      editor->cursor = pos;
-      LineIterator *it = begin_l_iter(editor->root, pos.row);
-      if (!it)
-        return;
-      uint32_t line_len;
-      char *line = next_line(it, &line_len);
-      free(it);
-      if (!line)
-        return;
-      editor->cursor_preffered =
-          get_visual_col_from_bytes(line, line_len, pos.col);
-      free(line);
-    } 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);
-      editor->cursor = {new_row, new_col};
-      LineIterator *it = begin_l_iter(editor->root, new_row);
-      if (!it)
-        return;
-      uint32_t line_len;
-      char *line = next_line(it, &line_len);
-      free(it);
-      if (!line)
-        return;
-      editor->cursor_preffered =
-          get_visual_col_from_bytes(line, line_len, new_col);
-      free(line);
-    }
-    lock_1.unlock();
-    std::unique_lock lock_2(editor->knot_mtx);
-    editor->root = erase(editor->root, byte_pos, end - byte_pos);
-    lock_2.unlock();
-    if (editor->tree) {
-      TSInputEdit edit = {
-          .start_byte = byte_pos,
-          .old_end_byte = end,
-          .new_end_byte = byte_pos,
-          .start_point = old_point,
-          .old_end_point = {point.row, point.col},
-          .new_end_point = old_point,
-      };
-      editor->edit_queue.push(edit);
-    }
-    std::unique_lock lock_3(editor->spans.mtx);
-    apply_edit(editor->spans.spans, byte_pos, byte_pos - end);
-    if (editor->spans.mid_parse)
-      editor->spans.edits.push({byte_pos, byte_pos - end});
-  }
-}
-
-void edit_insert(Editor *editor, 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) +
-      editor->cursor.col;
-  uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
-  TSPoint start_point = {pos.row, 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);
-    editor->cursor = {new_row, new_col};
-  }
-  lock_1.unlock();
-  std::unique_lock lock_2(editor->knot_mtx);
-  editor->root = insert(editor->root, byte_pos, data, len);
-  if (memchr(data, '\n', len))
-    editor->folded.resize(editor->root->line_count + 2);
-  lock_2.unlock();
-  uint32_t cols = 0;
-  uint32_t rows = 0;
-  for (uint32_t i = 0; i < len; i++) {
-    if (data[i] == '\n') {
-      rows++;
-      cols = 0;
-    } else {
-      cols++;
-    }
-  }
-  if (editor->tree) {
-    TSInputEdit edit = {
-        .start_byte = byte_pos,
-        .old_end_byte = byte_pos,
-        .new_end_byte = byte_pos + len,
-        .start_point = start_point,
-        .old_end_point = start_point,
-        .new_end_point = {start_point.row + rows,
-                          (rows == 0) ? (start_point.column + cols) : cols},
-    };
-    editor->edit_queue.push(edit);
-  }
-  std::unique_lock lock_3(editor->spans.mtx);
-  apply_edit(editor->spans.spans, byte_pos, len);
-  if (editor->spans.mid_parse)
-    editor->spans.edits.push({byte_pos, len});
-}
-
 void render_editor(Editor *editor) {
   uint32_t sel_start = 0, sel_end = 0;
   if (editor->selection_active) {

src/editor_ctrl.cc

@@ -0,0 +1,464 @@
+extern "C" {
+#include "../libs/libgrapheme/grapheme.h"
+}
+#include "../include/editor.h"
+#include "../include/utils.h"
+
+void cursor_down(Editor *editor, uint32_t number) {
+  if (!editor || !editor->root || number == 0)
+    return;
+  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  uint32_t len;
+  char *line_content = next_line(it, &len);
+  if (line_content == nullptr)
+    return;
+  if (editor->cursor_preffered == UINT32_MAX)
+    editor->cursor_preffered =
+        get_visual_col_from_bytes(line_content, len, editor->cursor.col);
+  uint32_t visual_col = editor->cursor_preffered;
+  do {
+    free(line_content);
+    line_content = next_line(it, &len);
+    editor->cursor.row += 1;
+    if (editor->cursor.row >= editor->root->line_count) {
+      editor->cursor.row = editor->root->line_count - 1;
+      break;
+    };
+    if (editor->folded[editor->cursor.row] != 0)
+      number++;
+  } while (--number > 0);
+  free(it);
+  if (line_content == nullptr)
+    return;
+  editor->cursor.col = get_bytes_from_visual_col(line_content, len, visual_col);
+  free(line_content);
+}
+
+void cursor_up(Editor *editor, uint32_t number) {
+  if (!editor || !editor->root || number == 0)
+    return;
+  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  uint32_t len;
+  char *line_content = next_line(it, &len);
+  if (!line_content) {
+    free(it);
+    return;
+  }
+  if (editor->cursor_preffered == UINT32_MAX)
+    editor->cursor_preffered =
+        get_visual_col_from_bytes(line_content, len, editor->cursor.col);
+  uint32_t visual_col = editor->cursor_preffered;
+  free(line_content);
+  while (number > 0 && editor->cursor.row > 0) {
+    editor->cursor.row--;
+    if (editor->folded[editor->cursor.row] != 0)
+      continue;
+    number--;
+  }
+  free(it);
+  it = begin_l_iter(editor->root, editor->cursor.row);
+  line_content = next_line(it, &len);
+  if (!line_content) {
+    free(it);
+    return;
+  }
+  editor->cursor.col = get_bytes_from_visual_col(line_content, len, visual_col);
+  free(line_content);
+  free(it);
+}
+
+void cursor_right(Editor *editor, uint32_t number) {
+  if (!editor || !editor->root || number == 0)
+    return;
+  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  uint32_t line_len;
+  char *line = next_line(it, &line_len);
+  free(it);
+  if (!line)
+    return;
+  if (line[line_len - 1] == '\n')
+    --line_len;
+  while (number > 0) {
+    if (editor->cursor.col >= line_len) {
+      free(line);
+      line = nullptr;
+      uint32_t next_row = editor->cursor.row + 1;
+      while (next_row < editor->root->line_count &&
+             editor->folded[next_row] != 0)
+        next_row++;
+      if (next_row >= editor->root->line_count) {
+        editor->cursor.col = line_len;
+        break;
+      }
+      editor->cursor.row = next_row;
+      editor->cursor.col = 0;
+      it = begin_l_iter(editor->root, editor->cursor.row);
+      line = next_line(it, &line_len);
+      free(it);
+      if (!line)
+        break;
+      if (line[line_len - 1] == '\n')
+        --line_len;
+    } else {
+      uint32_t inc = grapheme_next_character_break_utf8(
+          line + editor->cursor.col, line_len - editor->cursor.col);
+      if (inc == 0)
+        break;
+      editor->cursor.col += inc;
+    }
+    number--;
+  }
+  LineIterator *it2 = begin_l_iter(editor->root, editor->cursor.row);
+  uint32_t len2;
+  char *cur_line = next_line(it2, &len2);
+  free(it2);
+  if (cur_line) {
+    if (len2 > 0 && cur_line[len2 - 1] == '\n')
+      --len2;
+    editor->cursor_preffered =
+        get_visual_col_from_bytes(cur_line, len2, editor->cursor.col);
+    free(cur_line);
+  } else {
+    editor->cursor_preffered = UINT32_MAX;
+  }
+  if (line)
+    free(line);
+}
+
+void cursor_left(Editor *editor, uint32_t number) {
+  if (!editor || !editor->root || number == 0)
+    return;
+  LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
+  uint32_t len;
+  char *line = next_line(it, &len);
+  free(it);
+  if (!line)
+    return;
+  if (line[len - 1] == '\n')
+    line[--len] = '\0';
+  while (number > 0) {
+    if (editor->cursor.col == 0) {
+      free(line);
+      line = nullptr;
+      if (editor->cursor.row == 0)
+        break;
+      int32_t prev_row = editor->cursor.row - 1;
+      while (prev_row >= 0 && editor->folded[prev_row] != 0)
+        prev_row--;
+      if (prev_row < 0)
+        break;
+      editor->cursor.row = prev_row;
+      it = begin_l_iter(editor->root, editor->cursor.row);
+      line = next_line(it, &len);
+      free(it);
+      if (!line)
+        break;
+      if (line[len - 1] == '\n')
+        --len;
+      editor->cursor.col = len;
+    } else {
+      uint32_t col = editor->cursor.col;
+      uint32_t new_col = 0;
+      uint32_t visual_col = 0;
+      while (new_col < col) {
+        uint32_t inc =
+            grapheme_next_character_break_utf8(line + new_col, len - new_col);
+        if (new_col + inc >= col)
+          break;
+        new_col += inc;
+        visual_col++;
+      }
+      editor->cursor.col = new_col;
+    }
+    number--;
+  }
+  LineIterator *it2 = begin_l_iter(editor->root, editor->cursor.row);
+  uint32_t len2;
+  char *cur_line = next_line(it2, &len2);
+  free(it2);
+  if (cur_line) {
+    if (len2 > 0 && cur_line[len2 - 1] == '\n')
+      --len2;
+    editor->cursor_preffered =
+        get_visual_col_from_bytes(cur_line, len2, editor->cursor.col);
+    free(cur_line);
+  } else {
+    editor->cursor_preffered = UINT32_MAX;
+  }
+  if (line)
+    free(line);
+}
+
+Coord move_right(Editor *editor, Coord cursor, uint32_t number) {
+  Coord result = cursor;
+  if (!editor || !editor->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);
+  char *line = next_line(it, &line_len);
+  free(it);
+  if (!line)
+    return result;
+  if (line_len > 0 && line[line_len - 1] == '\n')
+    --line_len;
+  while (number > 0) {
+    if (col >= line_len) {
+      free(line);
+      line = nullptr;
+      uint32_t next_row = row + 1;
+      while (next_row < editor->root->line_count &&
+             editor->folded[next_row] != 0)
+        next_row++;
+      if (next_row >= editor->root->line_count) {
+        col = line_len;
+        break;
+      }
+      row = next_row;
+      col = 0;
+      it = begin_l_iter(editor->root, row);
+      line = next_line(it, &line_len);
+      free(it);
+      if (!line)
+        break;
+      if (line_len > 0 && line[line_len - 1] == '\n')
+        --line_len;
+    } else {
+      uint32_t inc =
+          grapheme_next_character_break_utf8(line + col, line_len - col);
+      if (inc == 0)
+        break;
+      col += inc;
+    }
+    number--;
+  }
+  if (line)
+    free(line);
+  result.row = row;
+  result.col = col;
+  return result;
+}
+
+Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
+  Coord result = cursor;
+  if (!editor || !editor->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);
+  char *line = next_line(it, &len);
+  free(it);
+  if (!line)
+    return result;
+  if (len > 0 && line[len - 1] == '\n')
+    --len;
+  while (number > 0) {
+    if (col == 0) {
+      free(line);
+      line = nullptr;
+      if (row == 0)
+        break;
+      int32_t prev_row = row - 1;
+      while (prev_row >= 0 && editor->folded[prev_row] != 0)
+        prev_row--;
+      if (prev_row < 0)
+        break;
+      row = prev_row;
+      it = begin_l_iter(editor->root, row);
+      line = next_line(it, &len);
+      free(it);
+      if (!line)
+        break;
+      if (len > 0 && line[len - 1] == '\n')
+        --len;
+      col = len;
+    } else {
+      uint32_t new_col = 0;
+      while (new_col < col) {
+        uint32_t inc =
+            grapheme_next_character_break_utf8(line + new_col, len - new_col);
+        if (new_col + inc >= col)
+          break;
+        new_col += inc;
+      }
+      col = new_col;
+    }
+    number--;
+  }
+  if (line)
+    free(line);
+  result.row = row;
+  result.col = col;
+  return result;
+}
+
+void edit_erase(Editor *editor, 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) +
+        editor->cursor.col;
+    TSPoint old_point = {pos.row, pos.col};
+    uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
+    Coord point = move_left(editor, pos, -len);
+    uint32_t start = line_to_byte(editor->root, point.row, nullptr) + point.col;
+    if (cursor_original > start && cursor_original <= byte_pos) {
+      editor->cursor = point;
+      LineIterator *it = begin_l_iter(editor->root, point.row);
+      if (!it)
+        return;
+      uint32_t line_len;
+      char *line = next_line(it, &line_len);
+      free(it);
+      if (!line)
+        return;
+      editor->cursor_preffered =
+          get_visual_col_from_bytes(line, line_len, point.col);
+      free(line);
+    } 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);
+      editor->cursor = {new_row, new_col};
+      LineIterator *it = begin_l_iter(editor->root, new_row);
+      if (!it)
+        return;
+      uint32_t line_len;
+      char *line = next_line(it, &line_len);
+      free(it);
+      if (!line)
+        return;
+      editor->cursor_preffered =
+          get_visual_col_from_bytes(line, line_len, new_col);
+      free(line);
+    }
+    lock_1.unlock();
+    std::unique_lock lock_2(editor->knot_mtx);
+    editor->root = erase(editor->root, start, byte_pos - start);
+    lock_2.unlock();
+    if (editor->tree) {
+      TSInputEdit edit = {
+          .start_byte = start,
+          .old_end_byte = byte_pos,
+          .new_end_byte = start,
+          .start_point = {point.row, point.col},
+          .old_end_point = old_point,
+          .new_end_point = {point.row, point.col},
+      };
+      editor->edit_queue.push(edit);
+    }
+    std::unique_lock lock_3(editor->spans.mtx);
+    apply_edit(editor->spans.spans, start, start - byte_pos);
+    if (editor->spans.mid_parse)
+      editor->spans.edits.push({start, start - byte_pos});
+  } else {
+    std::shared_lock lock_1(editor->knot_mtx);
+    uint32_t cursor_original =
+        line_to_byte(editor->root, editor->cursor.row, nullptr) +
+        editor->cursor.col;
+    TSPoint old_point = {pos.row, pos.col};
+    uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
+    Coord point = move_right(editor, pos, len);
+    uint32_t end = line_to_byte(editor->root, point.row, nullptr) + point.col;
+    if (cursor_original > byte_pos && cursor_original <= end) {
+      editor->cursor = pos;
+      LineIterator *it = begin_l_iter(editor->root, pos.row);
+      if (!it)
+        return;
+      uint32_t line_len;
+      char *line = next_line(it, &line_len);
+      free(it);
+      if (!line)
+        return;
+      editor->cursor_preffered =
+          get_visual_col_from_bytes(line, line_len, pos.col);
+      free(line);
+    } 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);
+      editor->cursor = {new_row, new_col};
+      LineIterator *it = begin_l_iter(editor->root, new_row);
+      if (!it)
+        return;
+      uint32_t line_len;
+      char *line = next_line(it, &line_len);
+      free(it);
+      if (!line)
+        return;
+      editor->cursor_preffered =
+          get_visual_col_from_bytes(line, line_len, new_col);
+      free(line);
+    }
+    lock_1.unlock();
+    std::unique_lock lock_2(editor->knot_mtx);
+    editor->root = erase(editor->root, byte_pos, end - byte_pos);
+    lock_2.unlock();
+    if (editor->tree) {
+      TSInputEdit edit = {
+          .start_byte = byte_pos,
+          .old_end_byte = end,
+          .new_end_byte = byte_pos,
+          .start_point = old_point,
+          .old_end_point = {point.row, point.col},
+          .new_end_point = old_point,
+      };
+      editor->edit_queue.push(edit);
+    }
+    std::unique_lock lock_3(editor->spans.mtx);
+    apply_edit(editor->spans.spans, byte_pos, byte_pos - end);
+    if (editor->spans.mid_parse)
+      editor->spans.edits.push({byte_pos, byte_pos - end});
+  }
+}
+
+void edit_insert(Editor *editor, 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) +
+      editor->cursor.col;
+  uint32_t byte_pos = line_to_byte(editor->root, pos.row, nullptr) + pos.col;
+  TSPoint start_point = {pos.row, 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);
+    editor->cursor = {new_row, new_col};
+  }
+  lock_1.unlock();
+  std::unique_lock lock_2(editor->knot_mtx);
+  editor->root = insert(editor->root, byte_pos, data, len);
+  if (memchr(data, '\n', len))
+    editor->folded.resize(editor->root->line_count + 2);
+  lock_2.unlock();
+  uint32_t cols = 0;
+  uint32_t rows = 0;
+  for (uint32_t i = 0; i < len; i++) {
+    if (data[i] == '\n') {
+      rows++;
+      cols = 0;
+    } else {
+      cols++;
+    }
+  }
+  if (editor->tree) {
+    TSInputEdit edit = {
+        .start_byte = byte_pos,
+        .old_end_byte = byte_pos,
+        .new_end_byte = byte_pos + len,
+        .start_point = start_point,
+        .old_end_point = start_point,
+        .new_end_point = {start_point.row + rows,
+                          (rows == 0) ? (start_point.column + cols) : cols},
+    };
+    editor->edit_queue.push(edit);
+  }
+  std::unique_lock lock_3(editor->spans.mtx);
+  apply_edit(editor->spans.spans, byte_pos, len);
+  if (editor->spans.mid_parse)
+    editor->spans.edits.push({byte_pos, len});
+}

src/input.cc

@@ -1,22 +1,113 @@
+extern "C" {
+#include "../libs/libgrapheme/grapheme.h"
+}
 #include "../include/ui.h"
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <unistd.h>
 
-int read_input(char *buf, size_t buflen) {
+static Queue<char> input_queue;
-  size_t i = 0;
+
-  int n;
+int get_utf8_seq_len(uint8_t byte) {
-  n = read(STDIN_FILENO, &buf[i], 1);
+  if ((byte & 0x80) == 0x00)
-  if (n <= 0)
+    return 1;
-    return -1;
+  if ((byte & 0xE0) == 0xC0)
-  i++;
+    return 2;
-  if (buf[0] == '\x1b') {
+  if ((byte & 0xF0) == 0xE0)
-    while (i < buflen - 1) {
+    return 3;
-      n = read(STDIN_FILENO, &buf[i], 1);
+  if ((byte & 0xF8) == 0xF0)
-      if (n <= 0)
+    return 4;
+  return 1;
+}
+
+int get_next_byte(char *out) {
+  if (!input_queue.empty()) {
+    input_queue.pop(*out);
+    return 1;
+  }
+  int n = read(STDIN_FILENO, out, 1);
+  return (n > 0) ? 1 : 0;
+}
+
+void enqueue_bytes(const char *bytes, int len) {
+  for (int i = 0; i < len; i++)
+    input_queue.push(bytes[i]);
+}
+
+int read_input(char *&buf) {
+  size_t cap = 16;
+  buf = (char *)calloc(cap, sizeof(char));
+  size_t len = 0;
+  char header;
+  if (!get_next_byte(&header)) {
+    free(buf);
+    return 0;
+  }
+  if (header == '\x1b') {
+    buf[len++] = header;
+    while (len < 6) {
+      char next_c;
+      if (!get_next_byte(&next_c))
         break;
-      i++;
+      buf[len++] = next_c;
+    }
+    return len;
+  }
+  int seq_len = get_utf8_seq_len((uint8_t)header);
+  buf[len++] = header;
+  if (seq_len == 1)
+    return len;
+  for (int i = 1; i < seq_len; i++) {
+    char next_c;
+    if (!get_next_byte(&next_c)) {
+      enqueue_bytes(buf, len);
+      free(buf);
+      return 0;
+    }
+    buf[len++] = next_c;
+  }
+  uint_least32_t current_cp, prev_cp;
+  grapheme_decode_utf8(buf, len, &prev_cp);
+  uint_least16_t state = 0;
+  while (true) {
+    char next_header;
+    if (!get_next_byte(&next_header))
+      break;
+    int next_seq_len = get_utf8_seq_len((uint8_t)next_header);
+    char temp_seq[5];
+    temp_seq[0] = next_header;
+    int temp_len = 1;
+    bool complete_seq = true;
+    for (int i = 1; i < next_seq_len; i++) {
+      char c;
+      if (!get_next_byte(&c)) {
+        complete_seq = false;
+        break;
+      }
+      temp_seq[temp_len++] = c;
+    }
+    if (!complete_seq) {
+      enqueue_bytes(temp_seq, temp_len);
+      break;
+    }
+    grapheme_decode_utf8(temp_seq, temp_len, &current_cp);
+    if (grapheme_is_character_break(prev_cp, current_cp, &state)) {
+      enqueue_bytes(temp_seq, temp_len);
+      break;
+    } else {
+      if (len + temp_len + 1 >= cap) {
+        cap *= 2;
+        buf = (char *)realloc(buf, cap);
+      }
+      memcpy(buf + len, temp_seq, temp_len);
+      len += temp_len;
+      prev_cp = current_cp;
     }
   }
-  buf[i] = '\0';
+  buf[len] = '\0';
-  return i;
+  return len;
 }
 
 void capture_mouse(char *buf, KeyEvent *ret) {
@@ -48,22 +139,17 @@ void capture_mouse(char *buf, KeyEvent *ret) {
 
 KeyEvent read_key() {
   KeyEvent ret;
-  char buf[7];
+  char *buf;
-  int n = read_input(buf, sizeof(buf));
+  int n = read_input(buf);
   if (n <= 0) {
     ret.key_type = KEY_NONE;
-    ret.c = '\0';
     return ret;
   }
-  if (n == 1) {
+  if (buf[0] == '\x1b' && buf[1] == '[' && buf[2] == 'M') {
-    ret.key_type = KEY_CHAR;
-    ret.c = buf[0];
-  } else if (buf[0] == '\x1b' && buf[1] == '[' && buf[2] == 'M') {
     ret.key_type = KEY_MOUSE;
     capture_mouse(buf, &ret);
-  } else {
+  } else if (buf[0] == '\x1b' && buf[1] == '[') {
     ret.key_type = KEY_SPECIAL;
-    if (buf[0] == '\x1b' && buf[1] == '[') {
     int using_modifiers = buf[3] == ';';
     int pos;
     if (!using_modifiers) {
@@ -109,7 +195,13 @@ KeyEvent read_key() {
       ret.special_key = 99;
       break;
     }
+  } else if (n > 0) {
+    ret.key_type = KEY_CHAR;
+    ret.c = buf;
+    ret.len = n;
+    return ret;
   }
-  }
+  if (n > 0)
+    free(buf);
   return ret;
 }

src/main.cc

@@ -1,3 +1,4 @@
+#include "../include/main.h"
 #include "../include/editor.h"
 #include "../include/ts.h"
 #include "../include/ui.h"
@@ -9,10 +10,11 @@
 std::atomic<bool> running{true};
 Queue<KeyEvent> event_queue;
 
+uint8_t mode = NORMAL;
+
 void background_worker(Editor *editor) {
   while (running) {
     ts_collect_spans(editor);
-
     std::this_thread::sleep_for(std::chrono::milliseconds(16));
   }
 }
@@ -22,49 +24,107 @@ void input_listener() {
     KeyEvent event = read_key();
     if (event.key_type == KEY_NONE)
       continue;
-    if (event.key_type == KEY_CHAR && event.c == CTRL('q'))
+    if (event.key_type == KEY_CHAR && *event.c == CTRL('q'))
       running = false;
     event_queue.push(event);
+    std::this_thread::sleep_for(std::chrono::microseconds(100));
   }
 }
 
 void handle_editor_event(Editor *editor, KeyEvent event) {
-  if (event.key_type == KEY_SPECIAL && event.special_key == KEY_DOWN)
+  if (event.key_type == KEY_SPECIAL) {
+    switch (event.special_key) {
+    case KEY_DOWN:
       cursor_down(editor, 1);
-  if (event.key_type == KEY_SPECIAL && event.special_key == KEY_UP)
+      break;
+    case KEY_UP:
       cursor_up(editor, 1);
-  if (event.key_type == KEY_SPECIAL && event.special_key == KEY_LEFT)
+      break;
+    case KEY_LEFT:
       cursor_left(editor, 1);
-  if (event.key_type == KEY_SPECIAL && event.special_key == KEY_RIGHT)
+      break;
-    cursor_right(editor, 1);
+    case KEY_RIGHT:
-  if (event.key_type == KEY_CHAR &&
-      ((event.c >= 'a' && event.c <= 'z') ||
-       (event.c >= 'A' && event.c <= 'Z') ||
-       (event.c >= '0' && event.c <= '9') || event.c == ' ' || event.c == '!' ||
-       event.c == '@' || event.c == '#' || event.c == '$' || event.c == '%' ||
-       event.c == '^' || event.c == '&' || event.c == '*' || event.c == '(' ||
-       event.c == ')' || event.c == '-' || event.c == '_' || event.c == '=' ||
-       event.c == '+' || event.c == '[' || event.c == ']' || event.c == '{' ||
-       event.c == '}' || event.c == '\\' || event.c == '|' || event.c == ';' ||
-       event.c == ':' || event.c == '\'' || event.c == '"' || event.c == ',' ||
-       event.c == '.' || event.c == '<' || event.c == '>' || event.c == '/' ||
-       event.c == '?' || event.c == '`' || event.c == '~')) {
-    edit_insert(editor, editor->cursor, &event.c, 1);
       cursor_right(editor, 1);
+      break;
     }
-  if (event.key_type == KEY_CHAR && event.c == '\t') {
+  }
-    edit_insert(editor, editor->cursor, (char *)"\t", 1);
+  switch (mode) {
+  case NORMAL:
+    if (event.key_type == KEY_CHAR && event.len == 1) {
+      switch (event.c[0]) {
+      case 'a':
+      case 'i':
+        mode = INSERT;
+        break;
+      case 's':
+      case 'v':
+        mode = SELECT;
+        editor->selection_active = true;
+        editor->selection = editor->cursor;
+        break;
+      case ';':
+      case ':':
+        mode = RUNNER;
+        break;
+      case 0x7F:
+        cursor_left(editor, 1);
+        break;
+      case ' ':
+        cursor_right(editor, 1);
+        break;
+      }
+    }
+    break;
+  case INSERT:
+    if (event.key_type == KEY_CHAR) {
+      if (event.len == 1) {
+        if (event.c[0] == '\t') {
+          edit_insert(editor, editor->cursor, (char *)"  ", 1);
           cursor_right(editor, 2);
-  }
+        } else if (event.c[0] == '\n' || event.c[0] == '\r') {
-  if (event.key_type == KEY_CHAR && (event.c == '\n' || event.c == '\r')) {
           edit_insert(editor, editor->cursor, (char *)"\n", 1);
           cursor_right(editor, 1);
-  }
+        } else if (event.c[0] == 0x7F) {
-  if (event.key_type == KEY_CHAR && event.c == 0x7F)
           edit_erase(editor, editor->cursor, -1);
+        } else if (isprint((unsigned char)(event.c[0]))) {
+          edit_insert(editor, editor->cursor, event.c, 1);
+          cursor_right(editor, 1);
+        } else if (event.c[0] == 0x1B) {
+          mode = NORMAL;
+        }
+      } else if (event.len > 1) {
+        edit_insert(editor, editor->cursor, event.c, event.len);
+        cursor_right(editor, 1);
+      }
+    }
     if (event.key_type == KEY_SPECIAL && event.special_key == KEY_DELETE)
       edit_erase(editor, editor->cursor, 1);
+    break;
+  case SELECT:
+    if (event.key_type == KEY_CHAR && event.len == 1) {
+      switch (event.c[0]) {
+      case 0x1B:
+      case 's':
+      case 'v':
+        editor->selection_active = false;
+        mode = NORMAL;
+        break;
+      }
+    }
+    break;
+  case RUNNER:
+    if (event.key_type == KEY_CHAR && event.len == 1) {
+      switch (event.c[0]) {
+      case 0x1B:
+        mode = NORMAL;
+        break;
+      }
+    }
+    break;
+  }
   ensure_scroll(editor);
+  if (event.key_type == KEY_CHAR && event.c)
+    free(event.c);
 }
 
 int main(int argc, char *argv[]) {
@@ -89,7 +149,7 @@ int main(int argc, char *argv[]) {
     render_editor(editor);
     render();
 
-    std::this_thread::sleep_for(std::chrono::milliseconds(16));
+    std::this_thread::sleep_for(std::chrono::milliseconds(8));
   }
 
   input_thread.detach();

src/ts.cc

@@ -1,6 +1,7 @@
 #include "../include/ts.h"
 #include "../include/editor.h"
 #include "../include/knot.h"
+#include "../include/main.h"
 #include <algorithm>
 #include <cstdint>
 #include <fstream>
@@ -126,6 +127,8 @@ static inline bool ts_predicate(TSQuery *query, const TSQueryMatch &match,
       ts_query_predicates_for_pattern(query, match.pattern_index, &step_count);
   if (!steps || step_count != 4)
     return true;
+  if (source->char_count >= (1024 * 64))
+    return false;
   std::string command;
   std::string regex_txt;
   uint32_t subject_id = 0;