implement ability to dynamically change class of script objects

With an object created by QScriptEngine::newObject(), it should
be possible to call QScriptValue::setClass() to dynamically
change the behavior of that object. Similarly, it should be
possible to promote plain script objects to QObject (QVariant)
wrappers by calling the overload of QScriptEngine::newQObject()
(newVariant()) that takes a script object as the first argument.
This commit implements this capability.

The premise is the (internal) QScriptObject class, which inherits
JSC::JSObject. It reimplements all the methods for getting/setting
properties etc. Then there's a level of indirection to facilitate
dynamic change of the class: Each QScriptObject can have a
delegate associated with it that will handle operations on the
object. By default there is no delegate, so the object behaves as
a normal JS object, as you expect. However, once a delegate is set
(e.g., when QScriptValue::setScriptClass() is called),
QScriptObject will give the delegate the chance to handle the
object operation.

In addition to a delegate implementation for QScriptClass-based
objects, there are also delegates for QObject and QVariant
wrappers. These replace the QObjectWrapperObject and
QVariantWrapperObject classes.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/script/bridge/bridge.pri b/src/script/bridge/bridge.pri
index 585ccc0..cf8395a 100644
--- a/src/script/bridge/bridge.pri
+++ b/src/script/bridge/bridge.pri
@@ -1,9 +1,13 @@
 SOURCES += \
     $$PWD/qscriptfunction.cpp \
+    $$PWD/qscriptobject.cpp \
+    $$PWD/qscriptclassobject.cpp \
     $$PWD/qscriptvariant.cpp \
     $$PWD/qscriptqobject.cpp
 
 HEADERS += \
     $$PWD/qscriptfunction_p.h \
+    $$PWD/qscriptobject_p.h \
+    $$PWD/qscriptclassobject_p.h \
     $$PWD/qscriptvariant_p.h \
     $$PWD/qscriptqobject_p.h