/platform/external/webkit/WebCore/bindings/v8/V8NPObject.cpp
https://github.com/aharish/totoro-gb-opensource-update2 · C++ · 401 lines · 266 code · 78 blank · 57 comment · 50 complexity · 3c0f6759c77a878526f324d595ff23b5 MD5 · raw file
- /*
- * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include "config.h"
- #include "V8NPObject.h"
- #include "HTMLPlugInElement.h"
- #include "IdentifierRep.h"
- #include "NPV8Object.h"
- #include "V8DOMMap.h"
- #include "V8HTMLAppletElement.h"
- #include "V8HTMLEmbedElement.h"
- #include "V8HTMLObjectElement.h"
- #include "V8Helpers.h"
- #include "V8NPUtils.h"
- #include "V8Proxy.h"
- #include "npruntime_impl.h"
- #include "npruntime_priv.h"
- #include <wtf/OwnArrayPtr.h>
- using namespace WebCore;
- enum InvokeFunctionType {
- InvokeMethod = 1,
- InvokeConstruct = 2,
- InvokeDefault = 3
- };
- // 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;
- if (V8HTMLAppletElement::HasInstance(args.Holder()))
- element = V8HTMLAppletElement::toNative(args.Holder());
- else if (V8HTMLEmbedElement::HasInstance(args.Holder()))
- element = V8HTMLEmbedElement::toNative(args.Holder());
- else
- element = V8HTMLObjectElement::toNative(args.Holder());
- ScriptInstance scriptInstance = element->getInstance();
- if (scriptInstance)
- npObject = v8ObjectToNPObject(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() != npObjectInternalFieldCount)
- return throwError("NPMethod called on non-NPObject", V8Proxy::ReferenceError);
- npObject = v8ObjectToNPObject(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);
- bool retval = true;
- switch (functionId) {
- case InvokeMethod:
- if (npObject->_class->invoke) {
- v8::Handle<v8::String> functionName(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("Error calling method on NPObject!", V8Proxy::GeneralError);
- 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;
- }
- v8::Handle<v8::Value> npObjectMethodHandler(const v8::Arguments& args)
- {
- return npObjectInvokeImpl(args, InvokeMethod);
- }
- v8::Handle<v8::Value> npObjectInvokeDefaultHandler(const v8::Arguments& args)
- {
- if (args.IsConstructCall())
- return npObjectInvokeImpl(args, InvokeConstruct);
- return npObjectInvokeImpl(args, InvokeDefault);
- }
- static void weakTemplateCallback(v8::Persistent<v8::Value>, void* parameter);
- // NPIdentifier is PrivateIdentifier*.
- static WeakReferenceMap<PrivateIdentifier, v8::FunctionTemplate> staticTemplateMap(&weakTemplateCallback);
- static void weakTemplateCallback(v8::Persistent<v8::Value> object, void* parameter)
- {
- PrivateIdentifier* identifier = static_cast<PrivateIdentifier*>(parameter);
- ASSERT(identifier);
- ASSERT(staticTemplateMap.contains(identifier));
- staticTemplateMap.forget(identifier);
- }
- static v8::Handle<v8::Value> npObjectGetProperty(v8::Local<v8::Object> self, NPIdentifier identifier, v8::Local<v8::Value> key)
- {
- NPObject* npObject = v8ObjectToNPObject(self);
- // 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);
- if (npObject->_class->hasProperty && npObject->_class->hasProperty(npObject, identifier)
- && npObject->_class->getProperty) {
- NPVariant result;
- VOID_TO_NPVARIANT(result);
- if (!npObject->_class->getProperty(npObject, identifier, &result))
- return v8::Handle<v8::Value>();
- v8::Handle<v8::Value> returnValue = convertNPVariantToV8Object(&result, npObject);
- _NPN_ReleaseVariantValue(&result);
- return returnValue;
- }
- if (key->IsString() && npObject->_class->hasMethod && npObject->_class->hasMethod(npObject, identifier)) {
- PrivateIdentifier* id = static_cast<PrivateIdentifier*>(identifier);
- v8::Persistent<v8::FunctionTemplate> functionTemplate = staticTemplateMap.get(id);
- // Cache templates using identifier as the key.
- if (functionTemplate.IsEmpty()) {
- // Create a new template.
- v8::Local<v8::FunctionTemplate> temp = v8::FunctionTemplate::New();
- temp->SetCallHandler(npObjectMethodHandler, key);
- functionTemplate = v8::Persistent<v8::FunctionTemplate>::New(temp);
- staticTemplateMap.set(id, functionTemplate);
- }
- // FunctionTemplate caches function for each context.
- v8::Local<v8::Function> v8Function = functionTemplate->GetFunction();
- v8Function->SetName(v8::Handle<v8::String>::Cast(key));
- return v8Function;
- }
- return v8::Handle<v8::Value>();
- }
- v8::Handle<v8::Value> npObjectNamedPropertyGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
- {
- NPIdentifier identifier = getStringIdentifier(name);
- return npObjectGetProperty(info.Holder(), identifier, name);
- }
- v8::Handle<v8::Value> npObjectIndexedPropertyGetter(uint32_t index, const v8::AccessorInfo& info)
- {
- NPIdentifier identifier = _NPN_GetIntIdentifier(index);
- return npObjectGetProperty(info.Holder(), identifier, v8::Number::New(index));
- }
- v8::Handle<v8::Value> npObjectGetNamedProperty(v8::Local<v8::Object> self, v8::Local<v8::String> name)
- {
- NPIdentifier identifier = getStringIdentifier(name);
- return npObjectGetProperty(self, identifier, name);
- }
- v8::Handle<v8::Value> npObjectGetIndexedProperty(v8::Local<v8::Object> self, uint32_t index)
- {
- NPIdentifier identifier = _NPN_GetIntIdentifier(index);
- return npObjectGetProperty(self, identifier, v8::Number::New(index));
- }
- static v8::Handle<v8::Value> npObjectSetProperty(v8::Local<v8::Object> self, NPIdentifier identifier, v8::Local<v8::Value> value)
- {
- NPObject* npObject = v8ObjectToNPObject(self);
- // Verify that our wrapper wasn't using a NPObject which has already been deleted.
- if (!npObject || !_NPN_IsAlive(npObject)) {
- throwError("NPObject deleted", V8Proxy::ReferenceError);
- return value; // Intercepted, but an exception was thrown.
- }
- if (npObject->_class->hasProperty && npObject->_class->hasProperty(npObject, identifier)
- && npObject->_class->setProperty) {
- NPVariant npValue;
- VOID_TO_NPVARIANT(npValue);
- convertV8ObjectToNPVariant(value, npObject, &npValue);
- bool success = npObject->_class->setProperty(npObject, identifier, &npValue);
- _NPN_ReleaseVariantValue(&npValue);
- if (success)
- return value; // Intercept the call.
- }
- return notHandledByInterceptor();
- }
- v8::Handle<v8::Value> npObjectNamedPropertySetter(v8::Local<v8::String> name, v8::Local<v8::Value> value, const v8::AccessorInfo& info)
- {
- NPIdentifier identifier = getStringIdentifier(name);
- return npObjectSetProperty(info.Holder(), identifier, value);
- }
- v8::Handle<v8::Value> npObjectIndexedPropertySetter(uint32_t index, v8::Local<v8::Value> value, const v8::AccessorInfo& info)
- {
- NPIdentifier identifier = _NPN_GetIntIdentifier(index);
- return npObjectSetProperty(info.Holder(), identifier, value);
- }
- v8::Handle<v8::Value> npObjectSetNamedProperty(v8::Local<v8::Object> self, v8::Local<v8::String> name, v8::Local<v8::Value> value)
- {
- NPIdentifier identifier = getStringIdentifier(name);
- return npObjectSetProperty(self, identifier, value);
- }
- v8::Handle<v8::Value> npObjectSetIndexedProperty(v8::Local<v8::Object> self, uint32_t index, v8::Local<v8::Value> value)
- {
- NPIdentifier identifier = _NPN_GetIntIdentifier(index);
- return npObjectSetProperty(self, identifier, value);
- }
- v8::Handle<v8::Array> npObjectPropertyEnumerator(const v8::AccessorInfo& info, bool namedProperty)
- {
- NPObject* npObject = v8ObjectToNPObject(info.Holder());
- // Verify that our wrapper wasn't using a NPObject which
- // has already been deleted.
- if (!npObject || !_NPN_IsAlive(npObject))
- throwError("NPObject deleted", V8Proxy::ReferenceError);
- if (NP_CLASS_STRUCT_VERSION_HAS_ENUM(npObject->_class) && npObject->_class->enumerate) {
- uint32_t count;
- NPIdentifier* identifiers;
- if (npObject->_class->enumerate(npObject, &identifiers, &count)) {
- v8::Handle<v8::Array> properties = v8::Array::New(count);
- for (uint32_t i = 0; i < count; ++i) {
- IdentifierRep* identifier = static_cast<IdentifierRep*>(identifiers[i]);
- if (namedProperty)
- properties->Set(v8::Integer::New(i), v8::String::New(identifier->string()));
- else
- properties->Set(v8::Integer::New(i), v8::Integer::New(identifier->number()));
- }
- return properties;
- }
- }
- return v8::Handle<v8::Array>();
- }
- v8::Handle<v8::Array> npObjectNamedPropertyEnumerator(const v8::AccessorInfo& info)
- {
- return npObjectPropertyEnumerator(info, true);
- }
- v8::Handle<v8::Array> npObjectIndexedPropertyEnumerator(const v8::AccessorInfo& info)
- {
- return npObjectPropertyEnumerator(info, false);
- }
- static void weakNPObjectCallback(v8::Persistent<v8::Value>, void* parameter);
- static DOMWrapperMap<NPObject> staticNPObjectMap(&weakNPObjectCallback);
- static void weakNPObjectCallback(v8::Persistent<v8::Value> object, void* parameter)
- {
- NPObject* npObject = static_cast<NPObject*>(parameter);
- ASSERT(staticNPObjectMap.contains(npObject));
- ASSERT(npObject);
- // Must remove from our map before calling _NPN_ReleaseObject(). _NPN_ReleaseObject can call ForgetV8ObjectForNPObject, which
- // uses the table as well.
- staticNPObjectMap.forget(npObject);
- if (_NPN_IsAlive(npObject))
- _NPN_ReleaseObject(npObject);
- }
- v8::Local<v8::Object> createV8ObjectForNPObject(NPObject* object, NPObject* root)
- {
- static v8::Persistent<v8::FunctionTemplate> npObjectDesc;
- ASSERT(v8::Context::InContext());
- // If this is a v8 object, just return it.
- if (object->_class == npScriptObjectClass) {
- V8NPObject* v8NPObject = reinterpret_cast<V8NPObject*>(object);
- return v8::Local<v8::Object>::New(v8NPObject->v8Object);
- }
- // If we've already wrapped this object, just return it.
- if (staticNPObjectMap.contains(object))
- return v8::Local<v8::Object>::New(staticNPObjectMap.get(object));
- // FIXME: we should create a Wrapper type as a subclass of JSObject. It has two internal fields, field 0 is the wrapped
- // pointer, and field 1 is the type. There should be an api function that returns unused type id. The same Wrapper type
- // can be used by DOM bindings.
- if (npObjectDesc.IsEmpty()) {
- npObjectDesc = v8::Persistent<v8::FunctionTemplate>::New(v8::FunctionTemplate::New());
- npObjectDesc->InstanceTemplate()->SetInternalFieldCount(npObjectInternalFieldCount);
- npObjectDesc->InstanceTemplate()->SetNamedPropertyHandler(npObjectNamedPropertyGetter, npObjectNamedPropertySetter, 0, 0, npObjectNamedPropertyEnumerator);
- npObjectDesc->InstanceTemplate()->SetIndexedPropertyHandler(npObjectIndexedPropertyGetter, npObjectIndexedPropertySetter, 0, 0, npObjectIndexedPropertyEnumerator);
- npObjectDesc->InstanceTemplate()->SetCallAsFunctionHandler(npObjectInvokeDefaultHandler);
- }
- v8::Handle<v8::Function> v8Function = npObjectDesc->GetFunction();
- v8::Local<v8::Object> value = SafeAllocation::newInstance(v8Function);
- // If we were unable to allocate the instance, we avoid wrapping and registering the NP object.
- if (value.IsEmpty())
- return value;
- wrapNPObject(value, object);
- // KJS retains the object as part of its wrapper (see Bindings::CInstance).
- _NPN_RetainObject(object);
- _NPN_RegisterObject(object, root);
- // Maintain a weak pointer for v8 so we can cleanup the object.
- v8::Persistent<v8::Object> weakRef = v8::Persistent<v8::Object>::New(value);
- staticNPObjectMap.set(object, weakRef);
- return value;
- }
- void forgetV8ObjectForNPObject(NPObject* object)
- {
- if (staticNPObjectMap.contains(object)) {
- v8::HandleScope scope;
- v8::Persistent<v8::Object> handle(staticNPObjectMap.get(object));
- V8DOMWrapper::setDOMWrapper(handle, WebCore::V8ClassIndex::NPOBJECT, 0);
- staticNPObjectMap.forget(object);
- _NPN_ReleaseObject(object);
- }
- }