QmlDesigner: Rewriters parses immediately

The rewriter needs to parse the file immediately and not use the timer.

Change-Id: I6399edc23201d301dcb7d8d33d1bd956dd087b4c
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/designercore/include/externaldependenciesinterface.h

@@ -37,6 +37,7 @@ public:
     virtual bool isQt6Import() const = 0;
     virtual bool hasStartupTarget() const = 0;
     virtual PuppetStartData puppetStartData(const class Model &model) const = 0;
+    virtual bool instantQmlTextUpdate() const = 0;
 };
 
 } // namespace QmlDesigner

src/plugins/qmldesigner/designercore/model/rewriterview.cpp

@@ -1084,7 +1084,7 @@ void RewriterView::qmlTextChanged()
         }
 
         case Amend: {
-            if (m_instantQmlTextUpdate) {
+            if (m_instantQmlTextUpdate || externalDependencies().instantQmlTextUpdate()) {
                 amendQmlText();
             } else {
                 if (externalDependencies().viewManagerUsesRewriterView(this)) {

src/plugins/qmldesigner/qmldesignerexternaldependencies.cpp

@@ -231,4 +231,9 @@ PuppetStartData ExternalDependencies::puppetStartData(const Model &model) const
     return data;
 }
 
+bool ExternalDependencies::instantQmlTextUpdate() const
+{
+    return false;
+}
+
 } // namespace QmlDesigner

src/plugins/qmldesigner/qmldesignerexternaldependencies.h

@@ -34,6 +34,7 @@ public:
     bool isQt6Import() const override;
     bool hasStartupTarget() const override;
     PuppetStartData puppetStartData(const class Model &model) const override;
+    bool instantQmlTextUpdate() const override;
 
 private:
     const DesignerSettings &m_designerSettings;

tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp

@@ -158,6 +158,7 @@ public:
     bool isQt6Import() const override { return true; }
     bool hasStartupTarget() const override { return true; }
     PuppetStartData puppetStartData(const class Model &) const override { return {}; }
+    bool instantQmlTextUpdate() const override { return true; }
 
 public:
     QSettings qsettings;