Command_MoveLine

src/text_editor/commands_window.cpp

@@ -153,6 +153,56 @@ void Command_Move(View *view, int direction, bool ctrl = false, bool shift = fal
     }
 }
 
+void Command_MoveLine(View *view, int direction) {
+    Assert(direction == DIR_DOWN || direction == DIR_UP);
+    Scratch scratch;
+
+    struct XYPair {
+        XY front;
+        XY back;
+    };
+
+    Buffer *buffer = GetBuffer(view->active_buffer);
+    BeforeEdit(buffer, view->carets);
+    MergeCarets(view);
+    Array<XYPair> saved_xy = {scratch};
+    Array<Edit>   edits    = {scratch};
+    For(view->carets) {
+        Add(&saved_xy, {PosToXY(*buffer, GetFront(it)), PosToXY(*buffer, GetBack(it))});
+        Range lines_to_move_range = {GetFullLineStart(buffer, it.range.min), GetFullLineEnd(buffer, it.range.max)};
+
+        String16 string = GetString(*buffer, lines_to_move_range);
+        string          = Copy(scratch, string);
+        AddEdit(&edits, lines_to_move_range, {});
+
+        // @todo: GetPrevLine, GetNextLine, GetNextFull
+        // GetPrevLineStart, GetNextLineEnd
+        if (direction == DIR_DOWN) {
+            Int next_line_start = lines_to_move_range.max;
+            Int next_line_end   = GetFullLineEnd(buffer, next_line_start);
+            AddEdit(&edits, Rng(next_line_end), string);
+        } else {
+            Int prev_line_end   = lines_to_move_range.min - 1;
+            Int prev_line_start = GetFullLineStart(buffer, prev_line_end);
+            AddEdit(&edits, Rng(prev_line_start), string);
+        }
+    }
+    ApplyEdits(buffer, edits);
+    AfterEdit(buffer, &edits, &view->carets);
+
+    Int line_offset = direction == DIR_UP ? -1 : +1;
+    for (Int i = 0; i < saved_xy.len; i += 1) {
+        Caret  &caret  = view->carets[i];
+        XYPair &xypair = saved_xy[i];
+        xypair.front.line += line_offset;
+        xypair.back.line += line_offset;
+        Int front = XYToPos(*buffer, xypair.front);
+        Int back  = XYToPos(*buffer, xypair.back);
+
+        caret = MakeCaret(front, back);
+    }
+}
+
 void Command_Replace(View *view, String16 string) {
     Buffer *buffer = GetBuffer(view->active_buffer);
     Scratch scratch;
@@ -540,6 +590,8 @@ void WindowCommand(Event event, Window *window, View *view) {
         Command_CreateCursorVertical(view, DIR_DOWN);
     } else if (CtrlShift(SDLK_DOWN)) {
         Command_Move(view, DIR_DOWN, CTRL_PRESSED, SHIFT_PRESSED);
+    } else if (Alt(SDLK_DOWN)) {
+        Command_MoveLine(view, DIR_DOWN);
     } else if (Ctrl(SDLK_DOWN)) {
         Command_Move(view, DIR_DOWN, CTRL_PRESSED);
     } else if (Shift(SDLK_DOWN)) {
@@ -554,6 +606,8 @@ void WindowCommand(Event event, Window *window, View *view) {
         Command_CreateCursorVertical(view, DIR_UP);
     } else if (CtrlShift(SDLK_UP)) {
         Command_Move(view, DIR_UP, CTRL_PRESSED, SHIFT_PRESSED);
+    } else if (Alt(SDLK_UP)) {
+        Command_MoveLine(view, DIR_UP);
     } else if (Ctrl(SDLK_UP)) {
         Command_Move(view, DIR_UP, CTRL_PRESSED);
     } else if (Shift(SDLK_UP)) {

src/text_editor/todo.txt

@@ -1,4 +1,3 @@
-- we should be able to execute a buffer (even scratch
 - search as a command to execute which is going to be in the title bar
 - each buffer needs a directory even the special ones: C:\a\b\c\+errors?
 - open directories - resulting in buffer with dir listing and proper buffer name