Convert line endings command

src/text_editor/commands_window.cpp

@@ -353,6 +353,34 @@ void Command_TrimTrailingWhitespace(View *view, bool dont_trim_lines_with_cursor
     view->update_scroll = false;
 }
 
+void Command_ConvertLineEndings(View *view, bool dont_trim_lines_with_cursor) {
+    Scratch scratch;
+    Buffer *buffer = GetBuffer(view->active_buffer);
+
+    BeforeEdit(buffer, view->carets);
+    MergeCarets(view);
+
+    Array<Range> lines_to_skip_triming = {};
+    if (dont_trim_lines_with_cursor) lines_to_skip_triming = GetSelectedLinesSorted(scratch, view);
+
+    Array<Edit> edits = {scratch};
+    for (Int i = 0; i < buffer->line_starts.len; i += 1) {
+        Int range_index = FindRangeByPos(lines_to_skip_triming, i);
+        if (range_index != -1) continue;
+
+        Range   range = GetLineRangeWithoutNL(*buffer, i);
+        wchar_t cr    = GetChar(buffer, range.max - 1);
+        wchar_t lf    = GetChar(buffer, range.max);
+        if (cr == L'\r' && lf == L'\n') {
+            AddEdit(&edits, {range.max - 1, range.max}, L"");
+        }
+    }
+
+    ApplyEdits(buffer, edits);
+    AfterEdit(buffer, &edits, &view->carets, !KILL_SELECTION);
+    view->update_scroll = false;
+}
+
 void Command_KillSelectedLines(View *view) {
     Scratch scratch;
     Buffer *buffer = GetBuffer(view->active_buffer);
@@ -827,6 +855,7 @@ void WindowCommand(Event event, Window *window, View *view) {
         if (StyleTrimWhitespaceOnSave) {
             bool dont_trim_lines_with_cursor = true;
             Command_TrimTrailingWhitespace(view, dont_trim_lines_with_cursor);
+            Command_ConvertLineEndings(view, dont_trim_lines_with_cursor);
         }
 
         String16 string16 = GetString(*buffer);