| /* |
| * Copyright (C) 2013 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 "bindings/v8/V8CustomElementLifecycleCallbacks.h" |
| |
| #include "V8Element.h" |
| #include "bindings/v8/CustomElementBinding.h" |
| #include "bindings/v8/DOMDataStore.h" |
| #include "bindings/v8/ScriptController.h" |
| #include "bindings/v8/V8Binding.h" |
| #include "bindings/v8/V8HiddenPropertyName.h" |
| #include "bindings/v8/V8PerContextData.h" |
| #include "core/dom/ScriptExecutionContext.h" |
| #include "wtf/PassOwnPtr.h" |
| |
| namespace WebCore { |
| |
| #define CALLBACK_LIST(V) \ |
| V(created, Created) \ |
| V(enteredDocument, EnteredDocument) \ |
| V(leftDocument, LeftDocument) \ |
| V(attributeChanged, AttributeChanged) |
| |
| PassRefPtr<V8CustomElementLifecycleCallbacks> V8CustomElementLifecycleCallbacks::create(ScriptExecutionContext* scriptExecutionContext, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> enteredDocument, v8::Handle<v8::Function> leftDocument, v8::Handle<v8::Function> attributeChanged) |
| { |
| // A given object can only be used as a Custom Element prototype |
| // once; see customElementIsInterfacePrototypeObject |
| #define SET_HIDDEN_PROPERTY(Value, Name) \ |
| ASSERT(prototype->GetHiddenValue(V8HiddenPropertyName::customElement##Name()).IsEmpty()); \ |
| if (!Value.IsEmpty()) \ |
| prototype->SetHiddenValue(V8HiddenPropertyName::customElement##Name(), Value); |
| |
| CALLBACK_LIST(SET_HIDDEN_PROPERTY) |
| #undef SET_HIDDEN_PROPERTY |
| |
| return adoptRef(new V8CustomElementLifecycleCallbacks(scriptExecutionContext, prototype, created, enteredDocument, leftDocument, attributeChanged)); |
| } |
| |
| static CustomElementLifecycleCallbacks::CallbackType flagSet(v8::Handle<v8::Function> enteredDocument, v8::Handle<v8::Function> leftDocument, v8::Handle<v8::Function> attributeChanged) |
| { |
| // V8 Custom Elements always run created to swizzle prototypes. |
| int flags = CustomElementLifecycleCallbacks::Created; |
| |
| if (!enteredDocument.IsEmpty()) |
| flags |= CustomElementLifecycleCallbacks::EnteredDocument; |
| |
| if (!leftDocument.IsEmpty()) |
| flags |= CustomElementLifecycleCallbacks::LeftDocument; |
| |
| if (!attributeChanged.IsEmpty()) |
| flags |= CustomElementLifecycleCallbacks::AttributeChanged; |
| |
| return CustomElementLifecycleCallbacks::CallbackType(flags); |
| } |
| |
| template <typename T> |
| static void weakCallback(v8::Isolate*, v8::Persistent<T>*, ScopedPersistent<T>* handle) |
| { |
| handle->clear(); |
| } |
| |
| V8CustomElementLifecycleCallbacks::V8CustomElementLifecycleCallbacks(ScriptExecutionContext* scriptExecutionContext, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> enteredDocument, v8::Handle<v8::Function> leftDocument, v8::Handle<v8::Function> attributeChanged) |
| : CustomElementLifecycleCallbacks(flagSet(enteredDocument, leftDocument, attributeChanged)) |
| , ActiveDOMCallback(scriptExecutionContext) |
| , m_world(DOMWrapperWorld::current()) |
| , m_prototype(prototype) |
| , m_created(created) |
| , m_enteredDocument(enteredDocument) |
| , m_leftDocument(leftDocument) |
| , m_attributeChanged(attributeChanged) |
| , m_owner(0) |
| { |
| m_prototype.makeWeak(&m_prototype, weakCallback<v8::Object>); |
| |
| #define MAKE_WEAK(Var, _) \ |
| if (!m_##Var.isEmpty()) \ |
| m_##Var.makeWeak(&m_##Var, weakCallback<v8::Function>); |
| |
| CALLBACK_LIST(MAKE_WEAK) |
| #undef MAKE_WEAK |
| } |
| |
| V8PerContextData* V8CustomElementLifecycleCallbacks::creationContextData() |
| { |
| if (!scriptExecutionContext()) |
| return 0; |
| |
| v8::Handle<v8::Context> context = toV8Context(scriptExecutionContext(), m_world.get()); |
| if (context.IsEmpty()) |
| return 0; |
| |
| return V8PerContextData::from(context); |
| } |
| |
| V8CustomElementLifecycleCallbacks::~V8CustomElementLifecycleCallbacks() |
| { |
| if (!m_owner) |
| return; |
| |
| v8::HandleScope handleScope; |
| if (V8PerContextData* perContextData = creationContextData()) |
| perContextData->clearCustomElementBinding(m_owner); |
| } |
| |
| bool V8CustomElementLifecycleCallbacks::setBinding(CustomElementDefinition* owner, PassOwnPtr<CustomElementBinding> binding) |
| { |
| ASSERT(!m_owner); |
| |
| V8PerContextData* perContextData = creationContextData(); |
| if (!perContextData) |
| return false; |
| |
| m_owner = owner; |
| |
| // Bindings retrieve the prototype when needed from per-context data. |
| perContextData->addCustomElementBinding(owner, binding); |
| |
| return true; |
| } |
| |
| void V8CustomElementLifecycleCallbacks::created(Element* element) |
| { |
| if (!canInvokeCallback()) |
| return; |
| |
| element->setCustomElementState(Element::Upgraded); |
| |
| v8::HandleScope handleScope; |
| v8::Handle<v8::Context> context = toV8Context(scriptExecutionContext(), m_world.get()); |
| if (context.IsEmpty()) |
| return; |
| |
| v8::Context::Scope scope(context); |
| v8::Isolate* isolate = context->GetIsolate(); |
| |
| v8::Handle<v8::Object> receiver = DOMDataStore::current(isolate)->get<V8Element>(element, isolate); |
| if (!receiver.IsEmpty()) { |
| // Swizzle the prototype of the existing wrapper. We don't need to |
| // worry about non-existent wrappers; they will get the right |
| // prototype when wrapped. |
| v8::Handle<v8::Object> prototype = m_prototype.newLocal(isolate); |
| if (prototype.IsEmpty()) |
| return; |
| receiver->SetPrototype(prototype); |
| } |
| |
| v8::Handle<v8::Function> callback = m_created.newLocal(isolate); |
| if (callback.IsEmpty()) |
| return; |
| |
| if (receiver.IsEmpty()) |
| receiver = toV8(element, context->Global(), isolate).As<v8::Object>(); |
| |
| ASSERT(!receiver.IsEmpty()); |
| |
| v8::TryCatch exceptionCatcher; |
| exceptionCatcher.SetVerbose(true); |
| ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, receiver, 0, 0); |
| } |
| |
| void V8CustomElementLifecycleCallbacks::enteredDocument(Element* element) |
| { |
| call(m_enteredDocument, element); |
| } |
| |
| void V8CustomElementLifecycleCallbacks::leftDocument(Element* element) |
| { |
| call(m_leftDocument, element); |
| } |
| |
| void V8CustomElementLifecycleCallbacks::attributeChanged(Element* element, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue) |
| { |
| if (!canInvokeCallback()) |
| return; |
| |
| v8::HandleScope handleScope; |
| v8::Handle<v8::Context> context = toV8Context(scriptExecutionContext(), m_world.get()); |
| if (context.IsEmpty()) |
| return; |
| |
| v8::Context::Scope scope(context); |
| v8::Isolate* isolate = context->GetIsolate(); |
| |
| v8::Handle<v8::Object> receiver = toV8(element, context->Global(), isolate).As<v8::Object>(); |
| ASSERT(!receiver.IsEmpty()); |
| |
| v8::Handle<v8::Function> callback = m_attributeChanged.newLocal(isolate); |
| if (callback.IsEmpty()) |
| return; |
| |
| v8::Handle<v8::Value> argv[] = { |
| v8String(name, isolate), |
| oldValue.isNull() ? v8::Handle<v8::Value>(v8::Null()) : v8::Handle<v8::Value>(v8String(oldValue, isolate)), |
| newValue.isNull() ? v8::Handle<v8::Value>(v8::Null()) : v8::Handle<v8::Value>(v8String(newValue, isolate)) |
| }; |
| |
| v8::TryCatch exceptionCatcher; |
| exceptionCatcher.SetVerbose(true); |
| ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, receiver, WTF_ARRAY_LENGTH(argv), argv); |
| } |
| |
| void V8CustomElementLifecycleCallbacks::call(const ScopedPersistent<v8::Function>& weakCallback, Element* element) |
| { |
| if (!canInvokeCallback()) |
| return; |
| |
| v8::HandleScope handleScope; |
| v8::Handle<v8::Context> context = toV8Context(scriptExecutionContext(), m_world.get()); |
| if (context.IsEmpty()) |
| return; |
| |
| v8::Context::Scope scope(context); |
| v8::Isolate* isolate = context->GetIsolate(); |
| |
| v8::Handle<v8::Function> callback = weakCallback.newLocal(isolate); |
| if (callback.IsEmpty()) |
| return; |
| |
| v8::Handle<v8::Object> receiver = toV8(element, context->Global(), isolate).As<v8::Object>(); |
| ASSERT(!receiver.IsEmpty()); |
| |
| v8::TryCatch exceptionCatcher; |
| exceptionCatcher.SetVerbose(true); |
| ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, receiver, 0, 0); |
| } |
| |
| } // namespace WebCore |