C++ HTMLPlugInElement类代码示例

static void addPlugInsFromNodeListMatchingOriginHash(HTMLPlugInImageElementList& plugInList, PassRefPtr<NodeList> collection, unsigned originHash)
{
    for (unsigned i = 0, length = collection->length(); i < length; i++) {
        Node* node = collection->item(i);
        if (node->isPluginElement()) {
            HTMLPlugInElement* plugInElement = toHTMLPlugInElement(node);
            if (plugInElement->isPlugInImageElement() && plugInElement->displayState() <= HTMLPlugInElement::DisplayingSnapshot && plugInElement->plugInOriginHash() == originHash)
                plugInList.append(toHTMLPlugInImageElement(node));
        }
    }
}

static Instance* pluginInstance(Node* node)
{
    if (!node)
        return 0;
    if (!(node->hasTagName(objectTag) || node->hasTagName(embedTag) || node->hasTagName(appletTag)))
        return 0;
    HTMLPlugInElement* plugInElement = static_cast<HTMLPlugInElement*>(node);
    // The plugin element holds an owning reference, so we don't have to.
    Instance* instance = plugInElement->getInstance().get();
    if (!instance || !instance->rootObject())
        return 0;
    return instance;
}

v8::Handle<v8::Value> npObjectIndexedGetter(uint32_t index, const v8::AccessorInfo& info)
{
    HTMLPlugInElement* imp = C::toNative(info.Holder());
    ScriptInstance scriptInstance = imp->getInstance();
    if (!scriptInstance)
        return v8Undefined();

    v8::Local<v8::Object> instance = v8::Local<v8::Object>::New(scriptInstance->instance());
    if (instance.IsEmpty())
        return v8Undefined();

    return npObjectGetIndexedProperty(instance, index, info);
}

static v8::Handle<v8::Value> npObjectNamedSetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::AccessorInfo& info)
{
    HTMLPlugInElement* imp = C::toNative(info.Holder());
    ScriptInstance scriptInstance = imp->getInstance();
    if (!scriptInstance)
        return v8Undefined();

    v8::Local<v8::Object> instance = v8::Local<v8::Object>::New(scriptInstance->instance());
    if (instance.IsEmpty())
        return v8Undefined();

    return npObjectSetNamedProperty(instance, name, value, info);
}

static void npObjectNamedSetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info)
{
    HTMLPlugInElement* imp = C::toNative(info.Holder());
    ScriptInstance scriptInstance = imp->getInstance();
    if (!scriptInstance)
        return;

    v8::Local<v8::Object> instance = scriptInstance->newLocal(v8::Isolate::GetCurrent());
    if (instance.IsEmpty())
        return;

    npObjectSetNamedProperty(instance, name, value, info);
}

void npObjectIndexedGetter(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
{
    HTMLPlugInElement* imp = C::toNative(info.Holder());
    ScriptInstance scriptInstance = imp->getInstance();
    if (!scriptInstance)
        return;

    v8::Local<v8::Object> instance = scriptInstance->newLocal(v8::Isolate::GetCurrent());
    if (instance.IsEmpty())
        return;

    npObjectGetIndexedProperty(instance, index, info);
}

Instance* pluginInstance(Node* node)
{
    if (!node)
        return 0;
    if (!isPluginElement(node))
        return 0;

    HTMLPlugInElement* plugInElement = static_cast<HTMLPlugInElement*>(node);
    // The plugin element holds an owning reference, so we don't have to.
    Instance* instance = plugInElement->getInstance().get();
    if (!instance || !instance->rootObject())
        return 0;
    return instance;
}

static void addPlugInsFromNodeListMatchingPlugInOrigin(HTMLPlugInImageElementList& plugInList, PassRefPtr<NodeList> collection, const String& plugInOrigin, const String& mimeType)
{
    for (unsigned i = 0, length = collection->length(); i < length; i++) {
        Node* node = collection->item(i);
        if (node->isPluginElement()) {
            HTMLPlugInElement* plugInElement = toHTMLPlugInElement(node);
            if (plugInElement->isPlugInImageElement()) {
                HTMLPlugInImageElement* plugInImageElement = toHTMLPlugInImageElement(node);
                const KURL& loadedURL = plugInImageElement->loadedUrl();
                String otherMimeType = plugInImageElement->loadedMimeType();
                if (plugInOrigin == loadedURL.host() && mimeType == otherMimeType)
                    plugInList.append(plugInImageElement);
            }
        }
    }
}

void RenderEmbeddedObject::handleMissingPluginIndicatorEvent(Event* event)
{
    if (Page* page = document()->page()) {
        if (!page->chrome()->client()->shouldMissingPluginMessageBeButton())
            return;
    }
    
    if (!event->isMouseEvent())
        return;
    
    MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
    HTMLPlugInElement* element = static_cast<HTMLPlugInElement*>(node());
    if (event->type() == eventNames().mousedownEvent && static_cast<MouseEvent*>(event)->button() == LeftButton) {
        m_mouseDownWasInMissingPluginIndicator = isInMissingPluginIndicator(mouseEvent);
        if (m_mouseDownWasInMissingPluginIndicator) {
            if (Frame* frame = document()->frame()) {
                frame->eventHandler()->setCapturingMouseEventsNode(element);
                element->setIsCapturingMouseEvents(true);
            }
            setMissingPluginIndicatorIsPressed(true);
        }
        event->setDefaultHandled();
    }        
    if (event->type() == eventNames().mouseupEvent && static_cast<MouseEvent*>(event)->button() == LeftButton) {
        if (m_missingPluginIndicatorIsPressed) {
            if (Frame* frame = document()->frame()) {
                frame->eventHandler()->setCapturingMouseEventsNode(0);
                element->setIsCapturingMouseEvents(false);
            }
            setMissingPluginIndicatorIsPressed(false);
        }
        if (m_mouseDownWasInMissingPluginIndicator && isInMissingPluginIndicator(mouseEvent)) {
            if (Page* page = document()->page())
                page->chrome()->client()->missingPluginButtonClicked(element);            
        }
        m_mouseDownWasInMissingPluginIndicator = false;
        event->setDefaultHandled();
    }
    if (event->type() == eventNames().mousemoveEvent) {
        setMissingPluginIndicatorIsPressed(m_mouseDownWasInMissingPluginIndicator && isInMissingPluginIndicator(mouseEvent));
        event->setDefaultHandled();
    }
}

void DOMTimer::scriptDidInteractWithPlugin(HTMLPlugInElement& pluginElement)
{
    if (!DOMTimerFireState::current)
        return;

    if (pluginElement.isUserObservable())
        DOMTimerFireState::current->scriptDidInteractWithUserObservablePlugin = true;
    else
        DOMTimerFireState::current->scriptDidInteractWithNonUserObservablePlugin = true;
}

void RenderEmbeddedObject::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    if (!element() || !element()->isPluginElement())
        return;

    HTMLPlugInElement* plugInElement = toHTMLPlugInElement(element());

    if (plugInElement->displayState() > HTMLPlugInElement::DisplayingSnapshot) {
        RenderPart::paintContents(paintInfo, paintOffset);
        if (!plugInElement->isRestartedPlugin())
            return;
    }

    if (!plugInElement->isPlugInImageElement())
        return;

    Image* snapshot = toHTMLPlugInImageElement(plugInElement)->snapshotImage();
    if (snapshot)
        paintSnapshotImage(paintInfo, paintOffset, snapshot);
}

JSObject* pluginScriptObject(ExecState* exec, JSHTMLElement* jsHTMLElement)
{
    HTMLElement* element = jsHTMLElement->impl();
    if (!isPluginElement(element))
        return 0;

    HTMLPlugInElement* pluginElement = static_cast<HTMLPlugInElement*>(element);

    // First, see if we can ask the plug-in view for its script object.
    if (JSObject* scriptObject = pluginScriptObjectFromPluginViewBase(pluginElement, jsHTMLElement->globalObject()))
        return scriptObject;

    // Otherwise, fall back to getting the object from the instance.

    // The plugin element holds an owning reference, so we don't have to.
    Instance* instance = pluginElement->getInstance().get();
    if (!instance || !instance->rootObject())
        return 0;

    return instance->createRuntimeObject(exec);
}

// FIXME: need comments.
// Params: holder could be HTMLEmbedElement or NPObject
static v8::Handle<v8::Value> npObjectInvokeImpl(const v8::Arguments& args, InvokeFunctionType functionId)
{
    NPObject* npObject;

    // These three types are subtypes of HTMLPlugInElement.
    if (V8HTMLAppletElement::HasInstance(args.Holder()) || V8HTMLEmbedElement::HasInstance(args.Holder())
        || V8HTMLObjectElement::HasInstance(args.Holder())) {
        // The holder object is a subtype of HTMLPlugInElement.
        HTMLPlugInElement* element = V8DOMWrapper::convertDOMWrapperToNode<HTMLPlugInElement>(args.Holder());
        ScriptInstance scriptInstance = element->getInstance();
        if (scriptInstance)
            npObject = V8DOMWrapper::convertToNativeObject<NPObject>(V8ClassIndex::NPOBJECT, scriptInstance->instance());
        else
            npObject = 0;
    } else {
        // The holder object is not a subtype of HTMLPlugInElement, it must be an NPObject which has three
        // internal fields.
        if (args.Holder()->InternalFieldCount() != V8Custom::kNPObjectInternalFieldCount)
          return throwError("NPMethod called on non-NPObject", V8Proxy::ReferenceError);

        npObject = V8DOMWrapper::convertToNativeObject<NPObject>(V8ClassIndex::NPOBJECT, args.Holder());
    }

    // Verify that our wrapper wasn't using a NPObject which has already been deleted.
    if (!npObject || !_NPN_IsAlive(npObject))
        return throwError("NPObject deleted", V8Proxy::ReferenceError);

    // Wrap up parameters.
    int numArgs = args.Length();
    OwnArrayPtr<NPVariant> npArgs(new NPVariant[numArgs]);

    for (int i = 0; i < numArgs; i++)
        convertV8ObjectToNPVariant(args[i], npObject, &npArgs[i]);

    NPVariant result;
    VOID_TO_NPVARIANT(result);

    switch (functionId) {
    case InvokeMethod:
        if (npObject->_class->invoke) {
            v8::Handle<v8::String> functionName(v8::String::Cast(*args.Data()));
            NPIdentifier identifier = getStringIdentifier(functionName);
            npObject->_class->invoke(npObject, identifier, npArgs.get(), numArgs, &result);
        }
        break;
    case InvokeConstruct:
        if (npObject->_class->construct)
            npObject->_class->construct(npObject, npArgs.get(), numArgs, &result);
        break;
    case InvokeDefault:
        if (npObject->_class->invokeDefault)
            npObject->_class->invokeDefault(npObject, npArgs.get(), numArgs, &result);
        break;
    default:
        break;
    }

    for (int i=0; i < numArgs; i++)
        _NPN_ReleaseVariantValue(&npArgs[i]);

    // Unwrap return values.
    v8::Handle<v8::Value> returnValue = convertNPVariantToV8Object(&result, npObject);
    _NPN_ReleaseVariantValue(&result);

    return returnValue;
}

// FIXME: need comments.
// Params: holder could be HTMLEmbedElement or NPObject
static void npObjectInvokeImpl(const v8::FunctionCallbackInfo<v8::Value>& args, InvokeFunctionType functionId)
{
    NPObject* npObject;

    WrapperWorldType currentWorldType = worldType(args.GetIsolate());
    // These three types are subtypes of HTMLPlugInElement.
    if (V8HTMLAppletElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType) || V8HTMLEmbedElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType)
        || V8HTMLObjectElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType)) {
        // The holder object is a subtype of HTMLPlugInElement.
        HTMLPlugInElement* element;
        if (V8HTMLAppletElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType))
            element = V8HTMLAppletElement::toNative(args.Holder());
        else if (V8HTMLEmbedElement::HasInstance(args.Holder(), args.GetIsolate(), currentWorldType))
            element = V8HTMLEmbedElement::toNative(args.Holder());
        else
            element = V8HTMLObjectElement::toNative(args.Holder());
        ScriptInstance scriptInstance = element->getInstance();
        if (scriptInstance) {
            v8::Isolate* isolate = v8::Isolate::GetCurrent();
            v8::HandleScope handleScope(isolate);
            npObject = v8ObjectToNPObject(scriptInstance->newLocal(isolate));
        } else
            npObject = 0;
    } else {
        // The holder object is not a subtype of HTMLPlugInElement, it must be an NPObject which has three
        // internal fields.
        if (args.Holder()->InternalFieldCount() != npObjectInternalFieldCount) {
            throwError(v8ReferenceError, "NPMethod called on non-NPObject", args.GetIsolate());
            return;
        }

        npObject = v8ObjectToNPObject(args.Holder());
    }

    // Verify that our wrapper wasn't using a NPObject which has already been deleted.
    if (!npObject || !_NPN_IsAlive(npObject)) {
        throwError(v8ReferenceError, "NPObject deleted", args.GetIsolate());
        return;
    }

    // Wrap up parameters.
    int numArgs = args.Length();
    OwnArrayPtr<NPVariant> npArgs = adoptArrayPtr(new NPVariant[numArgs]);

    for (int i = 0; i < numArgs; i++)
        convertV8ObjectToNPVariant(args[i], npObject, &npArgs[i]);

    NPVariant result;
    VOID_TO_NPVARIANT(result);

    bool retval = true;
    switch (functionId) {
    case InvokeMethod:
        if (npObject->_class->invoke) {
            v8::Handle<v8::String> functionName = v8::Handle<v8::String>::Cast(args.Data());
            NPIdentifier identifier = getStringIdentifier(functionName);
            retval = npObject->_class->invoke(npObject, identifier, npArgs.get(), numArgs, &result);
        }
        break;
    case InvokeConstruct:
        if (npObject->_class->construct)
            retval = npObject->_class->construct(npObject, npArgs.get(), numArgs, &result);
        break;
    case InvokeDefault:
        if (npObject->_class->invokeDefault)
            retval = npObject->_class->invokeDefault(npObject, npArgs.get(), numArgs, &result);
        break;
    default:
        break;
    }

    if (!retval)
        throwError(v8GeneralError, "Error calling method on NPObject.", args.GetIsolate());

    for (int i = 0; i < numArgs; i++)
        _NPN_ReleaseVariantValue(&npArgs[i]);

    // Unwrap return values.
    v8::Handle<v8::Value> returnValue;
    if (_NPN_IsAlive(npObject))
        returnValue = convertNPVariantToV8Object(&result, npObject, args.GetIsolate());
    _NPN_ReleaseVariantValue(&result);

    v8SetReturnValue(args, returnValue);
}

bool PluginView::platformGetValue(NPNVariable variable, void* value, NPError* result)
{
    switch (variable) {
        case NPNVWindowNPObject: {
            NPObject* windowScriptObject =
                    m_parentFrame->script()->windowScriptNPObject();

            // Return value is expected to be retained, as described
            // here:
            // <http://www.mozilla.org/projects/plugin/npruntime.html>
            if (windowScriptObject)
                _NPN_RetainObject(windowScriptObject);

            void** v = (void**)value;
            *v = windowScriptObject;

            *result = NPERR_NO_ERROR;
            return true;
        }

        case NPNVPluginElementNPObject: {
            NPObject* pluginScriptObject = 0;

            if (m_element->hasTagName(appletTag) ||
                m_element->hasTagName(embedTag) ||
                m_element->hasTagName(objectTag)) {
                HTMLPlugInElement* pluginElement =
                        static_cast<HTMLPlugInElement*>(m_element);
                pluginScriptObject = pluginElement->getNPObject();
            }

            // Return value is expected to be retained, as described
            // here:
            // <http://www.mozilla.org/projects/plugin/npruntime.html>
            if (pluginScriptObject)
                _NPN_RetainObject(pluginScriptObject);

            void** v = (void**)value;
            *v = pluginScriptObject;

           *result = NPERR_NO_ERROR;
            return true;
        }

        case NPNVnetscapeWindow: {
            // Return the top level WebView Java object associated
            // with this instance.
            jobject *retObject = static_cast<jobject*>(value);
            // TODO: Is it safe for this to be NULL? It looks from the NPNVWindowNPObject case that it is.
            *retObject = android::WebViewCore::getWebViewCore(parent())->getWebViewJavaObject();
            *result = NPERR_NO_ERROR;
            return true;
        }

        case NPNVisOfflineBool: {
            if (value == NULL) {
              *result = NPERR_GENERIC_ERROR;
              return true;
            }
            bool* retValue = static_cast<bool*>(value);
            *retValue = !networkStateNotifier().onLine();
            *result = NPERR_NO_ERROR;
            return true;
        }

        case kSupportedDrawingModel_ANPGetValue: {
            uint32_t* bits = reinterpret_cast<uint32_t*>(value);
            *bits = kBitmap_ANPDrawingModel & kSurface_ANPDrawingModel;
            *result = NPERR_NO_ERROR;
            return true;
        }

        case kJavaContext_ANPGetValue: {
            jobject* retObject = static_cast<jobject*>(value);
            // TODO: Is it safe for this to be NULL? It looks from the NPNVWindowNPObject case that it is.
            *retObject = android::WebViewCore::getWebViewCore(parent())->getContext();
            *result = NPERR_NO_ERROR;
            return true;
        }

        default: {
            NPError error = NPERR_GENERIC_ERROR;
            (void)anp_getInterface(variable, value, &error);
            *result = error;
            return true;
        }
    }
}