intelligent highlight

lib/core/controllers/colored_text_editing_controller.dart

@@ -69,14 +69,42 @@ class ColoredTextEditingController extends TextEditingController {
  ///so this check avoid cleaning Mistake list when text wasn't really changed
  if (newText == text) return;
 
- _mistakes.clear();
- for (final recognizer in _recognizers) {
- recognizer.dispose();
+ // list containing mistakes with updated offset
+ final List<Mistake> newMistakes = [];
+ for (final mistake in _mistakes) {
+ // do not display mistake that was changed during text input
+ final bool _mistakeTextChanged = selection.start >= mistake.offset &&
+ selection.start <= mistake.endOffset;
+ if (_mistakeTextChanged) {
+ continue;
+ }
+
+ int newOffset = mistake.offset;
+ // move mistake if it located by the right side of cursor
+ if (selection.start <= mistake.offset) {
+ final bool _isTextExtended = newText.length > text.length;
+ _isTextExtended ? newOffset += 1 : newOffset -= 1;
+ }
+
+ newMistakes.add(
+ Mistake(
+ message: mistake.message,
+ type: mistake.type,
+ offset: newOffset,
+ length: mistake.length,
+ ),
+ );
  }
- _recognizers.clear();
+ // update current mistakes list with the moved one
+ _mistakes = newMistakes;
 
  final mistakes = await languageCheckService.findMistakes(newText);
- _mistakes = mistakes;
+ // findMistakes() future returns empty list if debouncing
+ // so in that case we don't need to update it
+ if (mistakes.isNotEmpty) {
+ _mistakes = mistakes;
+ }
+
  notifyListeners();
  }