Optimize checking keyframes in clipboard

Old implementation is expensive (~200ms) and this method is called
frequently. Also prevent pasting keyframes in the FormEditor.

Change-Id: Id083b553231893be31c7aab1d0da1809529316c8
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/integration/designdocument.cpp

@@ -50,6 +50,7 @@
 #include <coreplugin/idocument.h>
 #include <coreplugin/editormanager/editormanager.h>
 #include <utils/algorithm.h>
+#include <timelineactions.h>
 
 #include <qmljs/qmljsmodelmanagerinterface.h>
 
@@ -473,6 +474,9 @@ static void scatterItem(const ModelNode &pastedNode, const ModelNode &targetNode
 
 void DesignDocument::paste()
 {
+    if (TimelineActions::clipboardContainsKeyframes()) // pasting keyframes is handled in TimelineView
+        return;
+
     QScopedPointer<Model> pasteModel(DesignDocumentView::pasteToModel());
 
     if (!pasteModel)

src/plugins/qmldesigner/components/timelineeditor/timelineactions.cpp

@@ -33,13 +33,12 @@
 #include <designdocumentview.h>
 #include <nodelistproperty.h>
 #include <nodemetainfo.h>
-#include <rewritertransaction.h>
 #include <utils/algorithm.h>
 #include <utils/qtcassert.h>
 #include <variantproperty.h>
-#include <qmldesignerplugin.h>
 #include <qmlobjectnode.h>
 #include <qmltimelinekeyframegroup.h>
+#include <QClipboard>
 
 namespace QmlDesigner {
 
@@ -291,30 +290,8 @@ void TimelineActions::pasteKeyframes(AbstractView *timelineView, const QmlTimeli
 
 bool TimelineActions::clipboardContainsKeyframes()
 {
-    QScopedPointer<Model> pasteModel(DesignDocumentView::pasteToModel());
-
-    if (!pasteModel)
-        return false;
-
-    DesignDocumentView view;
-    pasteModel->attachView(&view);
-
-    if (!view.rootModelNode().isValid())
-        return false;
-
-    ModelNode rootNode = view.rootModelNode();
-
-    if (!rootNode.hasAnySubModelNodes())
-        return false;
-
-    //Sanity check
-    if (!QmlTimelineKeyframeGroup::checkKeyframesType(rootNode)) {
-        for (const ModelNode &node : rootNode.directSubModelNodes())
-            if (!QmlTimelineKeyframeGroup::checkKeyframesType(node))
-                return false;
-    }
-
-    return true;
+    QRegularExpression rxp("\\bKeyframe\\s*{.*}", QRegularExpression::DotMatchesEverythingOption);
+    return rxp.match(QApplication::clipboard()->text()).hasMatch();
 }
 
 } // namespace QmlDesigner