QmlEditor: show the id name when folding a block.

If the id of an element exists, it will be displayed instead of the normal "..."

Change-Id: I4e6633743b0e2ae014b7fbad3c752ef318c73659
Reviewed-by: Christian Kamm <christian.d.kamm@nokia.com>

src/plugins/qmljseditor/qmljseditor.cpp

@@ -1692,3 +1692,31 @@ TextEditor::IAssistInterface *QmlJSTextEditorWidget::createAssistInterface(
     }
     return 0;
 }
+
+QString QmlJSTextEditorWidget::foldReplacementText(const QTextBlock &block) const
+{
+    int curlyIndex = block.text().indexOf(QLatin1Char('{'));
+
+    if ((curlyIndex == -1) || !m_semanticInfo.isValid())
+        return TextEditor::BaseTextEditorWidget::foldReplacementText(block);
+
+    int pos = block.position() + curlyIndex;
+    Node *node = m_semanticInfo.rangeAt(pos);
+
+    if (node)  {
+        UiObjectInitializer *objectInitializer = 0;
+        if (UiObjectDefinition *def = cast<UiObjectDefinition *>(node))
+            objectInitializer = def->initializer;
+        else if (UiObjectBinding *binding = cast<UiObjectBinding *>(node))
+            objectInitializer = binding->initializer;
+
+        // Get the id value, if it exists, and display it
+        if (objectInitializer) {
+            QString objectId = idOfObject(objectInitializer);
+            if (!objectId.isEmpty())
+                return QLatin1String("id: ") + objectId + QLatin1String("...");
+        }
+    }
+
+    return TextEditor::BaseTextEditorWidget::foldReplacementText(block);
+}

src/plugins/qmljseditor/qmljseditor.h

@@ -216,6 +216,7 @@ protected:
     TextEditor::BaseTextEditor *createEditor();
     void createToolBar(QmlJSEditorEditable *editable);
     TextEditor::BaseTextEditorWidget::Link findLinkAt(const QTextCursor &cursor, bool resolveTarget = true);
+    QString foldReplacementText(const QTextBlock &block) const;
 
 private:
     bool isClosingBrace(const QList<QmlJS::Token> &tokens) const;

src/plugins/texteditor/basetexteditor.cpp

@@ -2657,9 +2657,12 @@ QTextBlock BaseTextEditorWidget::foldedBlockAt(const QPoint &pos, QRect *box) co
                 QRectF lineRect = line.naturalTextRect().translated(offset.x(), top);
                 lineRect.adjust(0, 0, -1, -1);
 
+                QString replacement = QLatin1String(" {") + foldReplacementText(block)
+                        + QLatin1String("}; ");
+
                 QRectF collapseRect(lineRect.right() + 12,
                                     lineRect.top(),
-                                    fontMetrics().width(QLatin1String(" {...}; ")),
+                                    fontMetrics().width(replacement),
                                     lineRect.height());
                 if (collapseRect.contains(pos)) {
                     QTextBlock result = block;
@@ -3453,9 +3456,12 @@ void BaseTextEditorWidget::paintEvent(QPaintEvent *e)
                 QRectF lineRect = line.naturalTextRect().translated(offset.x(), top);
                 lineRect.adjust(0, 0, -1, -1);
 
+                QString replacement = foldReplacementText(block);
+                QString rectReplacement = QLatin1String(" {") + replacement + QLatin1String("}; ");
+
                 QRectF collapseRect(lineRect.right() + 12,
                                     lineRect.top(),
-                                    fontMetrics().width(QLatin1String(" {...}; ")),
+                                    fontMetrics().width(rectReplacement),
                                     lineRect.height());
                 painter.setRenderHint(QPainter::Antialiasing, true);
                 painter.translate(.5, .5);
@@ -3463,8 +3469,6 @@ void BaseTextEditorWidget::paintEvent(QPaintEvent *e)
                 painter.setRenderHint(QPainter::Antialiasing, false);
                 painter.translate(-.5, -.5);
 
-                QString replacement = QLatin1String("...");
-
                 if (TextBlockUserData *nextBlockUserData = BaseTextDocumentLayout::testUserData(nextBlock)) {
                     if (nextBlockUserData->foldingStartIncluded())
                         replacement.prepend(nextBlock.text().trimmed().left(1));
@@ -6341,3 +6345,8 @@ IAssistInterface *BaseTextEditorWidget::createAssistInterface(AssistKind kind,
     Q_UNUSED(kind);
     return new DefaultAssistInterface(document(), position(), d->m_document, reason);
 }
+
+QString TextEditor::BaseTextEditorWidget::foldReplacementText(const QTextBlock &) const
+{
+    return QLatin1String("...");
+}

src/plugins/texteditor/basetexteditor.h

@@ -507,6 +507,11 @@ protected:
 
     void maybeClearSomeExtraSelections(const QTextCursor &cursor);
 
+    /*!
+      Reimplement this function to change the default replacement text.
+      */
+    virtual QString foldReplacementText(const QTextBlock &block) const;
+
 protected slots:
     virtual void slotUpdateExtraAreaWidth();
     virtual void slotModificationChanged(bool);