--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/v8/V8NPObject.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,419 @@
+/*
+* 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 "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>
+
+namespace WebCore {
+
+enum InvokeFunctionType {
+ InvokeMethod = 1,
+ InvokeConstruct = 2,
+ InvokeDefault = 3
+};
+
+struct IdentifierRep {
+ int number() const { return m_isString ? 0 : m_value.m_number; }
+ const char* string() const { return m_isString ? m_value.m_string : 0; }
+
+ union {
+ const char* m_string;
+ int m_number;
+ } m_value;
+ bool m_isString;
+};
+
+// 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));
+}
+
+v8::Handle<v8::Integer> npObjectQueryProperty(v8::Local<v8::String> name, const v8::AccessorInfo& info)
+{
+ NPIdentifier identifier = getStringIdentifier(name);
+ return npObjectGetProperty(info.Holder(), identifier, name).IsEmpty() ? v8::Handle<v8::Integer>() : v8::Integer::New(v8::None);
+}
+
+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, npObjectQueryProperty, 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;
+
+ V8DOMWrapper::setDOMWrapper(value, npObjectTypeInfo(), 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, npObjectTypeInfo(), 0);
+ staticNPObjectMap.forget(object);
+ _NPN_ReleaseObject(object);
+ }
+}
+
+} // namespace WebCore