QmlDesigner: Allow to disable semantic checks in transaction

The semantic checks are slow and sometimes we knoe that they
are not required.

Change-Id: I43cae131e4c5f47d2a61d34975913dd8cb6370fc
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

src/plugins/qmldesigner/designercore/rewritertransaction.cpp

@@ -72,12 +72,23 @@ bool RewriterTransaction::isValid() const
     return m_valid;
 }
 
+void RewriterTransaction::ignoreSemanticChecks()
+{
+    m_ignoreSemanticChecks = true;
+}
+
 void RewriterTransaction::commit()
 {
     if (m_valid) {
         m_valid = false;
+        bool oldSemanticChecks = view()->rewriterView()->checkSemanticErrors();
+        if (m_ignoreSemanticChecks)
+            view()->rewriterView()->setCheckSemanticErrors(false);
+
         view()->emitRewriterEndTransaction();
 
+        view()->rewriterView()->setCheckSemanticErrors(oldSemanticChecks);
+
         if (m_activeIdentifier) {
             qDebug() << "Commit RewriterTransaction:" << m_identifier << m_identifierNumber;
             bool success = m_identifierList.removeOne(m_identifier + QByteArrayLiteral("-") + QByteArray::number(m_identifierNumber));

src/plugins/qmldesigner/designercore/rewritertransaction.h

@@ -46,6 +46,8 @@ public:
 
     bool isValid() const;
 
+    void ignoreSemanticChecks();
+
 protected:
     AbstractView *view();
 private:
@@ -55,6 +57,7 @@ private:
    int m_identifierNumber;
    static QList<QByteArray> m_identifierList;
    static bool m_activeIdentifier;
+   bool m_ignoreSemanticChecks = false;
 };
 
 } //QmlDesigner