| /* |
| * 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 "npruntime_priv.h" |
| #include "NPV8Object.h" |
| #include "V8CustomBinding.h" |
| #include "V8DOMMap.h" |
| #include "V8Helpers.h" |
| #include "V8HTMLAppletElement.h" |
| #include "V8HTMLEmbedElement.h" |
| #include "V8HTMLObjectElement.h" |
| #include "V8NPUtils.h" |
| #include "V8Proxy.h" |
| #include "wtf/OwnArrayPtr.h" |
| |
| using namespace WebCore; |
| |
| enum InvokeFunctionType { |
| INVOKE_METHOD = 1, |
| INVOKE_CONSTRUCT = 2, |
| INVOKE_DEFAULT = 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 = V8Proxy::DOMWrapperToNode<HTMLPlugInElement>(args.Holder()); |
| ScriptInstance scriptInstance = element->getInstance(); |
| if (scriptInstance) |
| npObject = V8Proxy::ToNativeObject<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::REFERENCE_ERROR); |
| |
| npObject = V8Proxy::ToNativeObject<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::REFERENCE_ERROR); |
| |
| // 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 INVOKE_METHOD: |
| 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 INVOKE_CONSTRUCT: |
| if (npObject->_class->construct) |
| npObject->_class->construct(npObject, npArgs.get(), numArgs, &result); |
| break; |
| case INVOKE_DEFAULT: |
| 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; |
| } |
| |
| |
| v8::Handle<v8::Value> npObjectMethodHandler(const v8::Arguments& args) |
| { |
| return npObjectInvokeImpl(args, INVOKE_METHOD); |
| } |
| |
| |
| v8::Handle<v8::Value> npObjectInvokeDefaultHandler(const v8::Arguments& args) |
| { |
| if (args.IsConstructCall()) |
| return npObjectInvokeImpl(args, INVOKE_CONSTRUCT); |
| else |
| return npObjectInvokeImpl(args, INVOKE_DEFAULT); |
| } |
| |
| |
| 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 = V8Proxy::ToNativeObject<NPObject>(V8ClassIndex::NPOBJECT, 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::REFERENCE_ERROR); |
| |
| |
| 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; |
| |
| } else 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 = V8Proxy::ToNativeObject<NPObject>(V8ClassIndex::NPOBJECT, self); |
| |
| // Verify that our wrapper wasn't using a NPObject which |
| // has already been deleted. |
| if (!npObject || !_NPN_IsAlive(npObject)) { |
| throwError("NPObject deleted", V8Proxy::REFERENCE_ERROR); |
| 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 v8::Local<v8::Value>(); // Do not intercept the call. |
| } |
| |
| |
| 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); |
| } |
| |
| |
| 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(V8Custom::kNPObjectInternalFieldCount); |
| npObjectDesc->InstanceTemplate()->SetNamedPropertyHandler(npObjectNamedPropertyGetter, npObjectNamedPropertySetter); |
| npObjectDesc->InstanceTemplate()->SetIndexedPropertyHandler(npObjectIndexedPropertyGetter, npObjectIndexedPropertySetter); |
| 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)); |
| WebCore::V8Proxy::SetDOMWrapper(handle, WebCore::V8ClassIndex::NPOBJECT, 0); |
| staticNPObjectMap.forget(object); |
| NPN_ReleaseObject(object); |
| } |
| } |