Cleanup

README.md

@@ -6,10 +6,10 @@ 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.

include/main.h

@@ -0,0 +1,13 @@
+#ifndef MAIN_H
+#define MAIN_H
+
+#include <atomic>
+#include <vector>
+
+#define NORMAL 0
+#define INSERT 1
+#define SELECT 2
+
+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;
@@ -77,10 +77,9 @@ 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();

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();
@@ -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/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;
 
+char m = NORMAL;
+
 void background_worker(Editor *editor) {
   while (running) {
     ts_collect_spans(editor);
-
     std::this_thread::sleep_for(std::chrono::milliseconds(16));
   }
 }
@@ -25,6 +27,7 @@ void input_listener() {
     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));
   }
 }