From 4613955f735837d8007f5558db6a07ec5efb9ab5 Mon Sep 17 00:00:00 2001
From: Aaron Kennedy <aaron.kennedy@nokia.com>
Date: Fri, 12 Mar 2010 17:33:06 +1000
Subject: Optimization: Use id notifier for QtScript bindings

---
 .../qml/qdeclarativecontextscriptclass.cpp         |  9 +++++---
 src/declarative/qml/qdeclarativeengine_p.h         |  5 ++++-
 src/declarative/qml/qdeclarativeexpression.cpp     | 24 +++++++++++++++++++++-
 3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/src/declarative/qml/qdeclarativecontextscriptclass.cpp b/src/declarative/qml/qdeclarativecontextscriptclass.cpp
index 874eeac..0e5066e 100644
--- a/src/declarative/qml/qdeclarativecontextscriptclass.cpp
+++ b/src/declarative/qml/qdeclarativecontextscriptclass.cpp
@@ -252,6 +252,9 @@ QDeclarativeContextScriptClass::property(Object *object, const Identifier &name)
         QScriptValue rv;
         if (lastPropertyIndex < cp->idValueCount) {
             rv =  ep->objectClass->newQObject(cp->idValues[lastPropertyIndex].data());
+
+            if (ep->captureProperties) 
+                ep->capturedProperties << QDeclarativeEnginePrivate::CapturedProperty(&cp->idValues[lastPropertyIndex].bindings);
         } else {
             const QVariant &value = cp->propertyValues.at(lastPropertyIndex);
             if (value.userType() == qMetaTypeId<QList<QObject*> >()) {
@@ -259,10 +262,10 @@ QDeclarativeContextScriptClass::property(Object *object, const Identifier &name)
             } else {
                 rv = ep->scriptValueFromVariant(value);
             }
-        }
 
-        if (ep->captureProperties) 
-            ep->capturedProperties << QDeclarativeEnginePrivate::CapturedProperty(bindContext, -1, lastPropertyIndex + cp->notifyIndex);
+            if (ep->captureProperties) 
+                ep->capturedProperties << QDeclarativeEnginePrivate::CapturedProperty(bindContext, -1, lastPropertyIndex + cp->notifyIndex);
+        }
 
 
         return Value(scriptEngine, rv);
diff --git a/src/declarative/qml/qdeclarativeengine_p.h b/src/declarative/qml/qdeclarativeengine_p.h
index c73a758..fb8c5e7 100644
--- a/src/declarative/qml/qdeclarativeengine_p.h
+++ b/src/declarative/qml/qdeclarativeengine_p.h
@@ -144,10 +144,13 @@ public:
 
     struct CapturedProperty {
         CapturedProperty(QObject *o, int c, int n)
-            : object(o), coreIndex(c), notifyIndex(n) {}
+            : object(o), coreIndex(c), notifier(0), notifyIndex(n) {}
+        CapturedProperty(QDeclarativeNotifier *n)
+            : object(0), coreIndex(-1), notifier(n), notifyIndex(-1) {}
 
         QObject *object;
         int coreIndex;
+        QDeclarativeNotifier *notifier;
         int notifyIndex;
     };
     bool captureProperties;
diff --git a/src/declarative/qml/qdeclarativeexpression.cpp b/src/declarative/qml/qdeclarativeexpression.cpp
index 5ff22f7..f3299ba 100644
--- a/src/declarative/qml/qdeclarativeexpression.cpp
+++ b/src/declarative/qml/qdeclarativeexpression.cpp
@@ -656,7 +656,29 @@ void QDeclarativeExpressionPrivate::updateGuards(const QPODVector<QDeclarativeEn
         guard.target = q;
         guard.targetMethod = notifyIdx;
 
-        if (property.notifyIndex != -1) {
+        if (property.notifier != 0) {
+
+            if (!noChanges && guard.isConnected(property.notifier)) {
+                // Nothing to do
+
+            } else {
+                noChanges = false;
+
+                bool existing = false;
+                for (int jj = 0; !existing && jj < ii; ++jj) 
+                    if (data->guardList[jj].isConnected(property.notifier)) 
+                        existing = true;
+
+                if (existing) {
+                    // duplicate
+                    guard.disconnect();
+                } else {
+                    guard.connect(property.notifier);
+                }
+            }
+
+
+        } else if (property.notifyIndex != -1) {
 
             if (!noChanges && guard.isConnected(property.object, property.notifyIndex)) {
                 // Nothing to do
-- 
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