void ScriptController::clearScriptObjects()
{
PluginObjectMap::iterator it = m_pluginObjects.begin();
for (; it != m_pluginObjects.end(); ++it) {
_NPN_UnregisterObject(it->value);
_NPN_ReleaseObject(it->value);
}
m_pluginObjects.clear();
#if ENABLE(NETSCAPE_PLUGIN_API)
if (m_wrappedWindowScriptNPObject) {
NPObjectWrapper* windowScriptObjectWrapper = NPObjectWrapper::getWrapper(m_wrappedWindowScriptNPObject);
ASSERT(windowScriptObjectWrapper);
NPObject* windowScriptNPObject = NPObjectWrapper::getUnderlyingNPObject(m_wrappedWindowScriptNPObject);
ASSERT(windowScriptNPObject);
// Call _NPN_DeallocateObject() instead of _NPN_ReleaseObject() so that we don't leak if a plugin fails to release the window
// script object properly.
// This shouldn't cause any problems for plugins since they should have already been stopped and destroyed at this point.
_NPN_DeallocateObject(windowScriptNPObject);
// Clear out the wrapped window script object pointer held by the wrapper.
windowScriptObjectWrapper->clear();
_NPN_ReleaseObject(m_wrappedWindowScriptNPObject);
m_wrappedWindowScriptNPObject = 0;
}
#endif
}
PassScriptInstance ScriptController::createScriptInstanceForWidget(Widget* widget)
{
ASSERT(widget);
if (widget->isFrameView())
return 0;
#if ENABLE(NETSCAPE_PLUGIN_API)
NPObject* npObject = PlatformBridge::pluginScriptableObject(widget);
if (!npObject)
return 0;
// Frame Memory Management for NPObjects
// -------------------------------------
// NPObjects are treated differently than other objects wrapped by JS.
// NPObjects can be created either by the browser (e.g. the main
// window object) or by the plugin (the main plugin object
// for a HTMLEmbedElement). Further, unlike most DOM Objects, the frame
// is especially careful to ensure NPObjects terminate at frame teardown because
// if a plugin leaks a reference, it could leak its objects (or the browser's objects).
//
// The Frame maintains a list of plugin objects (m_pluginObjects)
// which it can use to quickly find the wrapped embed object.
//
// Inside the NPRuntime, we've added a few methods for registering
// wrapped NPObjects. The purpose of the registration is because
// javascript garbage collection is non-deterministic, yet we need to
// be able to tear down the plugin objects immediately. When an object
// is registered, javascript can use it. When the object is destroyed,
// or when the object's "owning" object is destroyed, the object will
// be un-registered, and the javascript engine must not use it.
//
// Inside the javascript engine, the engine can keep a reference to the
// NPObject as part of its wrapper. However, before accessing the object
// it must consult the _NPN_Registry.
v8::Local<v8::Object> wrapper = createV8ObjectForNPObject(npObject, 0);
#ifdef ANDROID_FIX
// TODO: this should be up streamed.
// HTMLEmbedElement::getInstance() will call this function with its closest
// ancestor who has the objectTag. So this "widget" may be already in the
// HashMap. If it does, even m_pluginObjects.set() is a no-op, we do need to
// call _NPN_ReleaseObject on the npObject to balance the reference count.
PluginObjectMap::iterator it = m_pluginObjects.find(widget);
if (it != m_pluginObjects.end()) {
ASSERT(it->second == npObject);
_NPN_ReleaseObject(it->second);
}
#endif
// Track the plugin object. We've been given a reference to the object.
m_pluginObjects.set(widget, npObject);
return V8ScriptInstance::create(wrapper);
#else
return 0;
#endif
}
void HTMLPlugInElement::detach(const AttachContext& context)
{
// Update the widget the next time we attach (detaching destroys the plugin).
// FIXME: None of this "needsWidgetUpdate" related code looks right.
if (renderer() && !useFallbackContent())
setNeedsWidgetUpdate(true);
if (m_isDelayingLoadEvent) {
m_isDelayingLoadEvent = false;
document().decrementLoadEventDelayCount();
}
// Only try to persist a plugin widget we actually own.
Widget* plugin = ownedWidget();
if (plugin && plugin->pluginShouldPersist())
m_persistedPluginWidget = plugin;
resetInstance();
// FIXME - is this next line necessary?
setWidget(nullptr);
if (m_isCapturingMouseEvents) {
if (LocalFrame* frame = document().frame())
frame->eventHandler().setCapturingMouseEventsNode(nullptr);
m_isCapturingMouseEvents = false;
}
if (m_NPObject) {
_NPN_ReleaseObject(m_NPObject);
m_NPObject = 0;
}
HTMLFrameOwnerElement::detach(context);
}
void ScriptController::cleanupScriptObjectsForPlugin(Widget* nativeHandle)
{
PluginObjectMap::iterator it = m_pluginObjects.find(nativeHandle);
if (it == m_pluginObjects.end())
return;
_NPN_UnregisterObject(it->value);
_NPN_ReleaseObject(it->value);
m_pluginObjects.remove(it);
}
void ScriptController::clearScriptObjects()
{
PluginObjectMap::iterator it = m_pluginObjects.begin();
for (; it != m_pluginObjects.end(); ++it) {
_NPN_UnregisterObject(it->value);
_NPN_ReleaseObject(it->value);
}
m_pluginObjects.clear();
if (m_windowScriptNPObject) {
// Dispose of the underlying V8 object before releasing our reference
// to it, so that if a plugin fails to release it properly we will
// only leak the NPObject wrapper, not the object, its document, or
// anything else they reference.
disposeUnderlyingV8Object(m_isolate, m_windowScriptNPObject);
_NPN_ReleaseObject(m_windowScriptNPObject);
m_windowScriptNPObject = 0;
}
}
void forgetV8ObjectForNPObject(NPObject* object)
{
v8::Isolate* isolate = v8::Isolate::GetCurrent();
v8::HandleScope scope(isolate);
v8::Handle<v8::Object> wrapper = staticNPObjectMap().getNewLocal(isolate, object);
if (!wrapper.IsEmpty()) {
V8DOMWrapper::clearNativeInfo(wrapper, npObjectTypeInfo());
staticNPObjectMap().removeAndDispose(object);
_NPN_ReleaseObject(object);
}
}
void ScriptController::cleanupScriptObjectsForPlugin(Widget* nativeHandle)
{
#if ENABLE(NETSCAPE_PLUGIN_API)
PluginObjectMap::iterator it = m_pluginObjects.find(nativeHandle);
if (it == m_pluginObjects.end())
return;
_NPN_UnregisterObject(it->second);
_NPN_ReleaseObject(it->second);
m_pluginObjects.remove(it);
#endif
}
inline void DOMWrapperMap<NPObject>::makeWeakCallback(v8::Isolate* isolate, v8::Persistent<v8::Object>* wrapper, DOMWrapperMap<NPObject>*)
{
NPObject* npObject = static_cast<NPObject*>(toNative(*wrapper));
ASSERT(npObject);
ASSERT(staticNPObjectMap().get(npObject) == *wrapper);
// Must remove from our map before calling _NPN_ReleaseObject(). _NPN_ReleaseObject can
// call forgetV8ObjectForNPObject, which uses the table as well.
staticNPObjectMap().removeAndDispose(npObject);
if (_NPN_IsAlive(npObject))
_NPN_ReleaseObject(npObject);
}
void _NPN_ReleaseVariantValue (NPVariant *variant)
{
assert (variant);
if (variant->type == NPVariantType_Object) {
_NPN_ReleaseObject (variant->value.objectValue);
variant->value.objectValue = 0;
}
else if (variant->type == NPVariantType_String) {
free ((void *)variant->value.stringValue.UTF8Characters);
variant->value.stringValue.UTF8Characters = 0;
variant->value.stringValue.UTF8Length = 0;
}
variant->type = NPVariantType_Void;
}
void ScriptController::clearScriptObjects()
{
PluginObjectMap::iterator it = m_pluginObjects.begin();
for (; it != m_pluginObjects.end(); ++it) {
_NPN_UnregisterObject(it->second);
_NPN_ReleaseObject(it->second);
}
m_pluginObjects.clear();
#if ENABLE(NETSCAPE_PLUGIN_API)
if (m_windowScriptNPObject) {
// Call _NPN_DeallocateObject() instead of _NPN_ReleaseObject() so that we don't leak if a plugin fails to release the window
// script object properly.
// This shouldn't cause any problems for plugins since they should have already been stopped and destroyed at this point.
_NPN_DeallocateObject(m_windowScriptNPObject);
m_windowScriptNPObject = 0;
}
#endif
}
void WebBindings::releaseObject(NPObject* object)
{
return _NPN_ReleaseObject(object);
}
CInstance::~CInstance()
{
_NPN_ReleaseObject(_object);
}
void NPN_ReleaseObject(NPObject *obj) {
_NPN_ReleaseObject(obj);
}