Clean up manual reference counting of QQmlScriptData

QQmlScriptData is another data type that is best reference counted using
automatic means.

Change-Id: I9e25ac81ccdc03c2eefa35fcecc9cdfcc06dfe0a
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

src/qml/compiler/qv4compileddata.cpp

@@ -216,8 +216,6 @@ void CompilationUnit::unlink()
 
     propertyCaches.clear();
 
-    for (int ii = 0; ii < dependentScripts.count(); ++ii)
-        dependentScripts.at(ii)->release();
     dependentScripts.clear();
 
     typeNameCache = nullptr;

src/qml/compiler/qv4compileddata_p.h

@@ -969,7 +969,7 @@ public:
     int totalParserStatusCount = 0; // Number of instantiated types that are QQmlParserStatus subclasses
     int totalObjectCount = 0; // Number of objects explicitly instantiated
 
-    QVector<QQmlScriptData *> dependentScripts;
+    QVector<QQmlRefPointer<QQmlScriptData>> dependentScripts;
     ResolvedTypeReferenceMap resolvedTypes;
 
     bool verifyChecksum(const DependentTypesHasher &dependencyHasher) const;

src/qml/qml/qqmlobjectcreator.cpp

@@ -193,7 +193,7 @@ QObject *QQmlObjectCreator::create(int subComponentIndex, QObject *parent, QQmlI
         context->importedScripts.set(v4, scripts);
         QV4::ScopedValue v(scope);
         for (int i = 0; i < compilationUnit->dependentScripts.count(); ++i) {
-            QQmlScriptData *s = compilationUnit->dependentScripts.at(i);
+            QQmlRefPointer<QQmlScriptData> s = compilationUnit->dependentScripts.at(i);
             scripts->putIndexed(i, (v = s->scriptValueForContext(context)));
         }
     } else if (sharedState->creationContext) {

src/qml/qml/qqmltypeloader.cpp

@@ -2374,8 +2374,7 @@ void QQmlTypeData::done()
             }
 
             m_compiledData->typeNameCache->add(qualifier.toString(), scriptIndex, enclosingNamespace);
-            QQmlScriptData *scriptData = script.script->scriptData();
-            scriptData->addref();
+            QQmlRefPointer<QQmlScriptData> scriptData = script.script->scriptData();
             m_compiledData->dependentScripts << scriptData;
         }
     }
@@ -2947,19 +2946,15 @@ void QQmlScriptData::clear()
 }
 
 QQmlScriptBlob::QQmlScriptBlob(const QUrl &url, QQmlTypeLoader *loader)
-: QQmlTypeLoader::Blob(url, JavaScriptFile, loader), m_scriptData(nullptr)
+: QQmlTypeLoader::Blob(url, JavaScriptFile, loader)
 {
 }
 
 QQmlScriptBlob::~QQmlScriptBlob()
 {
-    if (m_scriptData) {
-        m_scriptData->release();
-        m_scriptData = nullptr;
-    }
 }
 
-QQmlScriptData *QQmlScriptBlob::scriptData() const
+QQmlRefPointer<QQmlScriptData> QQmlScriptBlob::scriptData() const
 {
     return m_scriptData;
 }
@@ -3101,7 +3096,7 @@ void QQmlScriptBlob::scriptImported(const QQmlRefPointer<QQmlScriptBlob> &blob,
 void QQmlScriptBlob::initializeFromCompilationUnit(const QQmlRefPointer<QV4::CompiledData::CompilationUnit> &unit)
 {
     Q_ASSERT(!m_scriptData);
-    m_scriptData = new QQmlScriptData();
+    m_scriptData.adopt(new QQmlScriptData());
     m_scriptData->url = finalUrl();
     m_scriptData->urlString = finalUrlString();
     m_scriptData->m_precompiledScript = unit;

src/qml/qml/qqmltypeloader_p.h

@@ -573,7 +573,7 @@ public:
         QQmlRefPointer<QQmlScriptBlob> script;
     };
 
-    QQmlScriptData *scriptData() const;
+    QQmlRefPointer<QQmlScriptData> scriptData() const;
 
 protected:
     void dataReceived(const SourceCodeData &) override;
@@ -587,7 +587,7 @@ private:
     void initializeFromCompilationUnit(const QQmlRefPointer<QV4::CompiledData::CompilationUnit> &unit);
 
     QList<ScriptReference> m_scripts;
-    QQmlScriptData *m_scriptData;
+    QQmlRefPointer<QQmlScriptData> m_scriptData;
 };
 
 class Q_AUTOTEST_EXPORT QQmlQmldirData : public QQmlTypeLoader::Blob