TextEditor: update matching parenthesis in the editor

... after updating the parenthesis in the layout

Task-number: QTCREATORBUG-26183
Change-Id: I346046fbc3932b94227c1ac5bee6b0d7c44651e1
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/texteditor/textdocumentlayout.cpp

@@ -387,12 +387,12 @@ TextDocumentLayout::~TextDocumentLayout()
 
 void TextDocumentLayout::setParentheses(const QTextBlock &block, const Parentheses &parentheses)
 {
-    if (parentheses.isEmpty()) {
-        if (TextBlockUserData *userData = textUserData(block))
-            userData->clearParentheses();
-    } else {
-        userData(block)->setParentheses(parentheses);
-    }
+    if (TextDocumentLayout::parentheses(block) == parentheses)
+        return;
+
+    userData(block)->setParentheses(parentheses);
+    if (auto layout = qobject_cast<TextDocumentLayout *>(block.document()->documentLayout()))
+        emit layout->parenthesesChanged(block);
 }
 
 Parentheses TextDocumentLayout::parentheses(const QTextBlock &block)
@@ -684,4 +684,18 @@ void TextDocumentLayout::FoldValidator::finalize()
     }
 }
 
+QDebug operator<<(QDebug debug, const Parenthesis &parenthesis)
+{
+    QDebugStateSaver saver(debug);
+    debug << (parenthesis.type == Parenthesis::Opened ? "Opening " : "Closing ") << parenthesis.chr
+          << " at " << parenthesis.pos;
+
+    return debug;
+}
+
+bool Parenthesis::operator==(const Parenthesis &other) const
+{
+    return pos == other.pos && chr == other.chr && source == other.source && type == other.type;
+}
+
 } // namespace TextEditor

src/plugins/texteditor/textdocumentlayout.h

@@ -52,8 +52,12 @@ struct TEXTEDITOR_EXPORT Parenthesis
     QChar chr;
     Utils::Id source;
     Type type = Opened;
+
+    bool operator==(const Parenthesis &other) const;
 };
 
+TEXTEDITOR_EXPORT QDebug operator<<(QDebug debug, const Parenthesis &parenthesis);
+
 class TEXTEDITOR_EXPORT CodeFormatterData
 {
 public:
@@ -231,6 +235,7 @@ public:
 signals:
     void updateExtraArea();
     void foldChanged(const int blockNumber, bool folded);
+    void parenthesesChanged(const QTextBlock block);
 };
 
 } // namespace TextEditor

src/plugins/texteditor/texteditor.cpp

@@ -1058,6 +1058,7 @@ void TextEditorWidgetPrivate::ctor(const QSharedPointer<TextDocument> &doc)
     // parentheses matcher
     m_formatRange = true;
     m_parenthesesMatchingTimer.setSingleShot(true);
+    m_parenthesesMatchingTimer.setInterval(50);
     QObject::connect(&m_parenthesesMatchingTimer, &QTimer::timeout,
                      this, &TextEditorWidgetPrivate::_q_matchParentheses);
 
@@ -2714,7 +2715,7 @@ void TextEditorWidget::keyPressEvent(QKeyEvent *e)
 
     skip_event:
     if (!ro && e->key() == Qt::Key_Delete && d->m_parenthesesMatchingEnabled)
-        d->m_parenthesesMatchingTimer.start(50);
+        d->m_parenthesesMatchingTimer.start();
 
     if (!ro && d->m_contentsChanged && isPrintableText(eventText) && !inOverwriteMode)
         d->m_codeAssistant.process();
@@ -3428,6 +3429,9 @@ void TextEditorWidgetPrivate::setupDocumentSignals()
     QObject::connect(documentLayout, &TextDocumentLayout::updateExtraArea,
                      this, &TextEditorWidgetPrivate::scheduleUpdateHighlightScrollBar);
 
+    QObject::connect(documentLayout, &TextDocumentLayout::parenthesesChanged,
+                     &m_parenthesesMatchingTimer, QOverload<>::of(&QTimer::start));
+
     QObject::connect(documentLayout, &QAbstractTextDocumentLayout::documentSizeChanged,
                      this, &TextEditorWidgetPrivate::scheduleUpdateHighlightScrollBar);
 
@@ -5431,7 +5435,7 @@ void TextEditorWidgetPrivate::updateHighlights()
         // Delay update when no matching is displayed yet, to avoid flicker
         if (q->extraSelections(TextEditorWidget::ParenthesesMatchingSelection).isEmpty()
             && m_bracketsAnimator == nullptr) {
-            m_parenthesesMatchingTimer.start(50);
+            m_parenthesesMatchingTimer.start();
         } else {
             // when we uncheck "highlight matching parentheses"
             // we need clear current selection before viewport update