Rework custom parser integration

The custom parser design used to be so that the custom parser operates on the "AST",
creates its own binary representation of the data it needs, stores it in a QByteArray
and gets that at object instantiation time. That meant serializing everything necessary.
With the introduction of the "binary" QML data structure, that process of serialization
becomes obsolete and would require extra work in the custom parsers for example for QQuickStates
to store the translation parameters.

The clean solution is to eliminate this unnecessary serialization process and
instead let the custom parsers do a verification pass at type compile time and
then simply operate directly on the QV4::CompiledData::Bindings at object
instantiation time. That simplifies the code, and allows for support of
translations throughout all list model properties.

Additionally this speeds up the creation of state objects and reduces memory
consumption. Previously a text: qsTr("foo") binding in states would result in
an actual java script binding. After this patch it is merely stored as a string
and translated at object instantiation time.

Change-Id: I7550274513f54abb09a0ab4de51c4c0bcdb23cae
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 4 insertions, 6 deletions

diff --git a/src/qml/qml/qqmlcustomparser_p.h b/src/qml/qml/qqmlcustomparser_p.h
index 2ce6375870..9e3f810738 100644
--- a/src/qml/qml/qqmlcustomparser_p.h
+++ b/src/qml/qml/qqmlcustomparser_p.h
@@ -71,8 +71,6 @@ struct QQmlCustomParserCompilerBackend
 
     int evaluateEnum(const QString &scope, const QByteArray& enumValue, bool *ok) const;
     const QMetaObject *resolveType(const QString& name) const;
-
-    virtual QQmlBinding::Identifier bindingIdentifier(const QV4::CompiledData::Binding *, QQmlCustomParser *) { return QQmlBinding::Invalid; }
 };
 
 class Q_QML_PRIVATE_EXPORT QQmlCustomParser
@@ -92,8 +90,8 @@ public:
     void clearErrors();
     Flags flags() const { return m_flags; }
 
-    virtual QByteArray compile(const QV4::CompiledData::QmlUnit *qmlUnit, const QList<const QV4::CompiledData::Binding *> &bindings) = 0;
-    virtual void setCustomData(QObject *, const QByteArray &, QQmlCompiledData *cdata) = 0;
+    virtual void verifyBindings(const QV4::CompiledData::QmlUnit *, const QList<const QV4::CompiledData::Binding *> &) = 0;
+    virtual void applyBindings(QObject *, QQmlCompiledData *, const QList<const QV4::CompiledData::Binding *> &) = 0;
 
     QList<QQmlError> errors() const { return exceptions; }
 
@@ -108,13 +106,13 @@ protected:
 
     const QMetaObject *resolveType(const QString&) const;
 
-    QQmlBinding::Identifier bindingIdentifier(const QV4::CompiledData::Binding *binding);
-
 private:
     QList<QQmlError> exceptions;
     QQmlCustomParserCompilerBackend *compiler;
     Flags m_flags;
+    QBiPointer<const QQmlImports, QQmlTypeNameCache> imports;
     friend class QQmlPropertyValidator;
+    friend class QQmlObjectCreator;
 };
 Q_DECLARE_OPERATORS_FOR_FLAGS(QQmlCustomParser::Flags)