From 6c200f77642ddd9ffd6d0eaeb151fc5c2b25b352 Mon Sep 17 00:00:00 2001
From: Krzosa Karol <krzosa@proton.me>
Date: Thu, 15 Jan 2026 23:26:14 +0100
Subject: [PATCH] plugin_basic_commands.cpp

---
 src/text_editor/plugin_basic_commands.cpp | 290 ++++++++++++++++++++++
 1 file changed, 290 insertions(+)
 create mode 100644 src/text_editor/plugin_basic_commands.cpp

diff --git a/src/text_editor/plugin_basic_commands.cpp b/src/text_editor/plugin_basic_commands.cpp
new file mode 100644
index 0000000..13e75b4
--- /dev/null
+++ b/src/text_editor/plugin_basic_commands.cpp
@@ -0,0 +1,290 @@
+void MoveCursorByPageSize(Window *window, int direction, bool shift = false) {
+    Assert(direction == DIR_UP || direction == DIR_DOWN);
+    BSet set = GetBSet(window);
+
+    Rect2I visible_cells_rect = GetVisibleCells(window);
+    Int    y                  = GetSize(visible_cells_rect).y - 2;
+    if (direction == DIR_UP) y = -y;
+
+    For(set.view->carets) {
+        XY xy = PosToXY(set.buffer, GetFront(it));
+        if (direction == DIR_DOWN && xy.line == set.buffer->line_starts.len - 1) {
+            Range line_range = GetLineRange(set.buffer, xy.line);
+            xy.col           = line_range.max - line_range.min;
+        } else if (direction == DIR_UP && xy.line == 0) {
+            xy.col = 0;
+        }
+        xy.line += y;
+
+        Int pos = XYToPos(set.buffer, xy);
+        if (shift) {
+            it = SetFront(it, pos);
+        } else {
+            it = MakeCaret(pos);
+        }
+    }
+}
+
+void CMD_Redo() {
+    BSet active = GetBSet(ActiveWindowID);
+    RedoEdit(active.buffer, &active.view->carets);
+} RegisterCommand(CMD_Redo, "ctrl-shift-z", "Redo after undoing changes to the buffer");
+
+void CMD_Undo() {
+    BSet active = GetBSet(ActiveWindowID);
+    UndoEdit(active.buffer, &active.view->carets);
+} RegisterCommand(CMD_Undo, "ctrl-z", "Undo last change you made to the buffer");
+
+void CMD_EncloseLine() {
+    BSet active = GetBSet(ActiveWindowID);
+    EncloseLine(active.view);
+} RegisterCommand(CMD_EncloseLine, "ctrl-l", "Select the entire line on which your caret is placed");
+
+void CMD_SelectAll() {
+    BSet active = GetBSet(ActiveWindowID);
+    SelectEntireBuffer(active.view);
+    active.view->update_scroll = false;
+} RegisterCommand(CMD_SelectAll, "ctrl-a", "Select the entire buffer");
+
+void CMD_KillSelectedLines() {
+    BSet active = GetBSet(ActiveWindowID);
+    KillSelectedLines(active.view);
+} RegisterCommand(CMD_KillSelectedLines, "ctrl-shift-k");
+
+void CMD_IndentSelectedLines() {
+    BSet active = GetBSet(ActiveWindowID);
+    IndentSelectedLines(active.view);
+} RegisterCommand(CMD_IndentSelectedLines, "ctrl-rightbracket | tab");
+
+void CMD_DedentSelectedLines() {
+    BSet active = GetBSet(ActiveWindowID);
+    IndentSelectedLines(active.view, true);
+} RegisterCommand(CMD_DedentSelectedLines, "ctrl-leftbracket | shift-tab");
+
+void CMD_DuplicateLineDown() {
+    BSet active = GetBSet(ActiveWindowID);
+    DuplicateLine(active.view, DIR_DOWN);
+} RegisterCommand(CMD_DuplicateLineDown, "ctrl-alt-down");
+
+void CMD_CreateCursorDown() {
+    BSet active = GetBSet(ActiveWindowID);
+    CreateCursorVertical(active.view, DIR_DOWN);
+} RegisterCommand(CMD_CreateCursorDown, "alt-shift-down");
+
+void CMD_SelectDownToEmptyLine() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_DOWN, CTRL_PRESSED, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectDownToEmptyLine, "ctrl-shift-down");
+
+void CMD_MoveLineDown() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCaretsLine(active.view, DIR_DOWN);
+} RegisterCommand(CMD_MoveLineDown, "alt-down");
+
+void CMD_MoveDownToEmptyLine() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_DOWN, CTRL_PRESSED);
+} RegisterCommand(CMD_MoveDownToEmptyLine, "ctrl-down");
+
+void CMD_SelectDown() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_DOWN, false, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectDown, "shift-down");
+
+void CMD_MoveDown() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_DOWN);
+} RegisterCommand(CMD_MoveDown, "down");
+
+void CMD_DuplicateLineUp() {
+    BSet active = GetBSet(ActiveWindowID);
+    DuplicateLine(active.view, DIR_UP);
+} RegisterCommand(CMD_DuplicateLineUp, "ctrl-alt-up");
+
+void CMD_CreateCursorUp() {
+    BSet active = GetBSet(ActiveWindowID);
+    CreateCursorVertical(active.view, DIR_UP);
+} RegisterCommand(CMD_CreateCursorUp, "alt-shift-up");
+
+void CMD_SelectUpToEmptyLine() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_UP, CTRL_PRESSED, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectUpToEmptyLine, "ctrl-shift-up");
+
+void CMD_MoveLineUp() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCaretsLine(active.view, DIR_UP);
+} RegisterCommand(CMD_MoveLineUp, "alt-up");
+
+void CMD_MoveUpToEmptyLine() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_UP, CTRL_PRESSED);
+} RegisterCommand(CMD_MoveUpToEmptyLine, "ctrl-up");
+
+void CMD_SelectUp() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_UP, false, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectUp, "shift-up");
+
+void CMD_MoveUp() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_UP);
+} RegisterCommand(CMD_MoveUp, "up");
+
+void CMD_BoundarySelectLeft() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_LEFT, CTRL_PRESSED, SHIFT_PRESS);
+} RegisterCommand(CMD_BoundarySelectLeft, "ctrl-shift-left");
+
+void CMD_BoundaryMoveLeft() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_LEFT, CTRL_PRESSED);
+} RegisterCommand(CMD_BoundaryMoveLeft, "ctrl-left");
+
+void CMD_SelectLeft() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_LEFT, false, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectLeft, "shift-left");
+
+void CMD_MoveLeft() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_LEFT);
+} RegisterCommand(CMD_MoveLeft, "left");
+
+void CMD_BoundarySelectRight() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_RIGHT, CTRL_PRESSED, SHIFT_PRESS);
+} RegisterCommand(CMD_BoundarySelectRight, "ctrl-shift-right");
+
+void CMD_BoundaryMoveRight() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_RIGHT, CTRL_PRESSED);
+} RegisterCommand(CMD_BoundaryMoveRight, "ctrl-right");
+
+void CMD_SelectRight() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_RIGHT, false, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectRight, "shift-right");
+
+void CMD_MoveRight() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCarets(active.view, DIR_RIGHT);
+} RegisterCommand(CMD_MoveRight, "right");
+
+void CMD_MoveUpAPage() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorByPageSize(active.window, DIR_UP);
+} RegisterCommand(CMD_MoveUpAPage, "pageup");
+
+void CMD_SelectUpPage() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorByPageSize(active.window, DIR_UP, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectUpPage, "shift-pageup");
+
+void CMD_MoveToStart() {
+    BSet active = GetBSet(ActiveWindowID);
+    SelectRange(active.view, MakeRange(0));
+} RegisterCommand(CMD_MoveToStart, "ctrl-pageup");
+
+void CMD_SelectDownPage() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorByPageSize(active.window, DIR_DOWN, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectDownPage, "shift-pagedown");
+
+void CMD_MoveToEnd() {
+    BSet active = GetBSet(ActiveWindowID);
+    SelectRange(active.view, MakeRange(active.buffer->len));
+} RegisterCommand(CMD_MoveToEnd, "ctrl-pagedown");
+
+void CMD_MoveDownPage() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorByPageSize(active.window, DIR_DOWN);
+} RegisterCommand(CMD_MoveDownPage, "pagedown");
+
+void CMD_SelectToLineStart() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorToSide(active.view, DIR_LEFT, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectToLineStart, "shift-home");
+
+void CMD_MoveToLineStart() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorToSide(active.view, DIR_LEFT);
+} RegisterCommand(CMD_MoveToLineStart, "home");
+
+void CMD_MoveToLineEnd() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorToSide(active.view, DIR_RIGHT);
+} RegisterCommand(CMD_MoveToLineEnd, "end");
+
+void CMD_SelectToLineEnd() {
+    BSet active = GetBSet(ActiveWindowID);
+    MoveCursorToSide(active.view, DIR_RIGHT, SHIFT_PRESS);
+} RegisterCommand(CMD_SelectToLineEnd, "shift-end");
+
+void CMD_DeleteCharacter() {
+    BSet active = GetBSet(ActiveWindowID);
+    Delete(active.view, DIR_LEFT);
+} RegisterCommand(CMD_DeleteCharacter, "shift-backspace | backspace");
+
+void CMD_DeleteBoundary() {
+    BSet active = GetBSet(ActiveWindowID);
+    Delete(active.view, DIR_LEFT, SHIFT_PRESS);
+} RegisterCommand(CMD_DeleteBoundary, "ctrl-backspace");
+
+void CMD_DeleteForward() {
+    BSet active = GetBSet(ActiveWindowID);
+    Delete(active.view, DIR_RIGHT);
+} RegisterCommand(CMD_DeleteForward, "shift-delete | delete");
+
+void CMD_DeleteForwardBoundary() {
+    BSet active = GetBSet(ActiveWindowID);
+    Delete(active.view, DIR_RIGHT, SHIFT_PRESS);
+} RegisterCommand(CMD_DeleteForwardBoundary, "ctrl-delete");
+
+void CMD_InsertNewLineUp() {
+    BSet active = GetBSet(ActiveWindowID);
+    SaveCaretHistoryBeforeBeginEdit(active.buffer, active.view->carets);
+    MoveCursorToSide(active.view, DIR_LEFT);
+    IndentedNewLine(active.view);
+    MoveCarets(active.view, DIR_UP);
+} RegisterCommand(CMD_InsertNewLineUp, "ctrl-shift-enter");
+
+void CMD_InsertNewLineDown() {
+    BSet active = GetBSet(ActiveWindowID);
+    SaveCaretHistoryBeforeBeginEdit(active.buffer, active.view->carets);
+    MoveCursorToSide(active.view, DIR_RIGHT);
+    IndentedNewLine(active.view);
+} RegisterCommand(CMD_InsertNewLineDown, "ctrl-enter");
+
+void CMD_NewLine() {
+    BSet active = GetBSet(ActiveWindowID);
+    IndentedNewLine(active.view);
+} RegisterCommand(CMD_NewLine, "enter | shift-enter");
+
+void CMD_CreateCaretOnNextFind() {
+    BSet active = GetBSet(ActiveWindowID);
+    String16 string = GetString(active.buffer, active.view->carets[0].range);
+    Caret    caret  = FindNext(active.buffer, string, active.view->carets[0]);
+    Insert(&active.view->carets, caret, 0);
+    MergeCarets(active.buffer, &active.view->carets);
+} RegisterCommand(CMD_CreateCaretOnNextFind, "ctrl-d");
+
+void CMD_ClearCarets() {
+    BSet active = GetBSet(ActiveWindowID);
+    active.view->carets.len = 1;
+    active.view->carets[0] = MakeCaret(GetFront(active.view->carets[0]));
+
+    if (active.window->lose_focus_on_escape && active.window->id == ActiveWindowID) {
+        if (active.window->primary) {
+            //
+        } else {
+            NextActiveWindowID = PrimaryWindowID;
+        }
+    }
+
+    For (Windows) {
+        if (it->lose_visibility_on_escape && it->visible) {
+            it->visible = false;
+        }
+    }
+} RegisterCommand(CMD_ClearCarets, "escape", "Clear all carets and reset to 1 caret, also do some windowing stuff that closes things on escape");