feat: greater to blockquote

frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/markdown_syntax_to_styled_text.dart

@@ -188,6 +188,26 @@ ShortcutEventHandler doubleTildeToStrikethrough = (editorState, event) {
   return KeyEventResult.handled;
 };
 
+ShortcutEventHandler greaterToBlockquote = (editorState, event) {
+  final selectionService = editorState.service.selectionService;
+  final selection = selectionService.currentSelection.value;
+  final textNodes = selectionService.currentSelectedNodes.whereType<TextNode>();
+  if (selection == null || !selection.isSingle || textNodes.length != 1) {
+    return KeyEventResult.ignored;
+  }
+
+  final textNode = textNodes.first;
+  final text = textNode.toPlainText();
+
+  //only convert > at the start of a paragraph
+  if (selection.startIndex != 0) {
+    return KeyEventResult.ignored;
+  }
+  formatQuote(editorState);
+
+  return KeyEventResult.handled;
+};
+
 ShortcutEventHandler markdownLinkOrImageHandler = (editorState, event) {
   final selectionService = editorState.service.selectionService;
   final selection = selectionService.currentSelection.value;

frontend/app_flowy/packages/appflowy_editor/lib/src/service/shortcut_event/built_in_shortcut_events.dart

@@ -285,6 +285,11 @@ List<ShortcutEvent> builtInShortcutEvents = [
     command: 'shift+tilde',
     handler: doubleTildeToStrikethrough,
   ),
+  ShortcutEvent(
+    key: 'Greater to blockquote',
+    command: 'shift+greater',
+    handler: greaterToBlockquote,
+  ),
   ShortcutEvent(
     key: 'Markdown link or image',
     command: 'shift+parenthesis right',

frontend/app_flowy/packages/appflowy_editor/test/infra/test_raw_key_event.dart

@@ -148,6 +148,9 @@ extension on LogicalKeyboardKey {
     if (this == LogicalKeyboardKey.tilde) {
       return PhysicalKeyboardKey.backquote;
     }
+    if (this == LogicalKeyboardKey.greater) {
+      return PhysicalKeyboardKey.intlBackslash;
+    }
     throw UnimplementedError();
   }
 }

frontend/app_flowy/packages/appflowy_editor/test/service/internal_key_event_handlers/markdown_syntax_to_styled_text_test.dart

@@ -256,5 +256,76 @@ void main() async {
         expect(textNode.toPlainText(), text);
       });
     });
+
+    group('convert geater to blockquote', () {
+      Future<void> insertGreater(
+        EditorWidgetTester editor, {
+        int repeat = 1,
+      }) async {
+        for (var i = 0; i < repeat; i++) {
+          await editor.pressLogicKey(
+            LogicalKeyboardKey.greater,
+            isShiftPressed: true,
+          );
+        }
+      }
+
+      testWidgets('>AppFlowy to blockquote AppFlowy', (tester) async {
+        const text = 'AppFlowy';
+        final editor = tester.editor..insertTextNode('');
+        await editor.startTesting();
+        await editor.updateSelection(
+          Selection.single(path: [0], startOffset: 0),
+        );
+        await insertGreater(editor);
+        final textNode = editor.nodeAtPath([0]) as TextNode;
+        for (var i = 0; i < text.length; i++) {
+          await editor.insertText(textNode, text[i], i);
+        }
+
+        final isQuote = textNode.subtype == BuiltInAttributeKey.quote;
+        expect(isQuote, true);
+        expect(textNode.toPlainText(), 'AppFlowy');
+      });
+
+      testWidgets('AppFlowy> nothing changes', (tester) async {
+        const text = 'AppFlowy';
+        final editor = tester.editor..insertTextNode('');
+        await editor.startTesting();
+        await editor.updateSelection(
+          Selection.single(path: [0], startOffset: 0),
+        );
+        final textNode = editor.nodeAtPath([0]) as TextNode;
+        for (var i = 0; i < text.length; i++) {
+          await editor.insertText(textNode, text[i], i);
+        }
+        await insertGreater(editor);
+
+        final isQuote = textNode.subtype == BuiltInAttributeKey.quote;
+        expect(isQuote, false);
+        expect(textNode.toPlainText(), text);
+      });
+
+      testWidgets('> in front of text to blockquote', (tester) async {
+        const text = 'AppFlowy';
+        final editor = tester.editor..insertTextNode('');
+        await editor.startTesting();
+        await editor.updateSelection(
+          Selection.single(path: [0], startOffset: 0),
+        );
+        final textNode = editor.nodeAtPath([0]) as TextNode;
+        for (var i = 0; i < text.length; i++) {
+          await editor.insertText(textNode, text[i], i);
+        }
+        await editor.updateSelection(
+          Selection.single(path: [0], startOffset: 0),
+        );
+        await insertGreater(editor);
+
+        final isQuote = textNode.subtype == BuiltInAttributeKey.quote;
+        expect(isQuote, true);
+        expect(textNode.toPlainText(), text);
+      });
+    });
   });
 }