Moved files under Source/bindings/v8 to Source/bindings/core/v8.

Source/bindings/v8/V8AbstractEventListener.cpp

-/*
- * 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 "bindings/v8/V8AbstractEventListener.h"
-
-#include "bindings/core/v8/V8Event.h"
-#include "bindings/core/v8/V8EventTarget.h"
-#include "bindings/v8/V8Binding.h"
-#include "bindings/v8/V8EventListenerList.h"
-#include "bindings/v8/V8HiddenValue.h"
-#include "core/events/BeforeUnloadEvent.h"
-#include "core/events/Event.h"
-#include "core/inspector/InspectorCounters.h"
-#include "core/workers/WorkerGlobalScope.h"
-
-namespace WebCore {
-
-V8AbstractEventListener::V8AbstractEventListener(bool isAttribute, ScriptState* scriptState)
-    : EventListener(JSEventListenerType)
-    , m_isAttribute(isAttribute)
-    , m_scriptState(scriptState)
-    , m_isolate(scriptState->isolate())
-{
-    if (isMainThread())
-        InspectorCounters::incrementCounter(InspectorCounters::JSEventListenerCounter);
-}
-
-V8AbstractEventListener::V8AbstractEventListener(bool isAttribute, v8::Isolate* isolate)
-    : EventListener(JSEventListenerType)
-    , m_isAttribute(isAttribute)
-    , m_scriptState(nullptr)
-    , m_isolate(isolate)
-{
-    if (isMainThread())
-        InspectorCounters::incrementCounter(InspectorCounters::JSEventListenerCounter);
-}
-
-V8AbstractEventListener::~V8AbstractEventListener()
-{
-    if (!m_listener.isEmpty()) {
-        v8::HandleScope scope(m_isolate);
-        V8EventListenerList::clearWrapper(m_listener.newLocal(isolate()), m_isAttribute, isolate());
-    }
-    if (isMainThread())
-        InspectorCounters::decrementCounter(InspectorCounters::JSEventListenerCounter);
-}
-
-void V8AbstractEventListener::handleEvent(ExecutionContext*, Event* event)
-{
-    // Don't reenter V8 if execution was terminated in this instance of V8.
-    if (scriptState()->executionContext()->isJSExecutionForbidden())
-        return;
-
-    ASSERT(event);
-
-    // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it.
-    // See issue 889829.
-    RefPtr<V8AbstractEventListener> protect(this);
-
-    if (scriptState()->contextIsEmpty())
-        return;
-    ScriptState::Scope scope(scriptState());
-
-    // Get the V8 wrapper for the event object.
-    v8::Handle<v8::Value> jsEvent = toV8(event, scriptState()->context()->Global(), isolate());
-    if (jsEvent.IsEmpty())
-        return;
-    invokeEventHandler(event, v8::Local<v8::Value>::New(isolate(), jsEvent));
-}
-
-void V8AbstractEventListener::setListenerObject(v8::Handle<v8::Object> listener)
-{
-    m_listener.set(isolate(), listener);
-    m_listener.setWeak(this, &setWeakCallback);
-}
-
-void V8AbstractEventListener::invokeEventHandler(Event* event, v8::Local<v8::Value> jsEvent)
-{
-    // If jsEvent is empty, attempt to set it as a hidden value would crash v8.
-    if (jsEvent.IsEmpty())
-        return;
-
-    ASSERT(!scriptState()->contextIsEmpty());
-    v8::Local<v8::Value> returnValue;
-    {
-        // Catch exceptions thrown in the event handler so they do not propagate to javascript code that caused the event to fire.
-        v8::TryCatch tryCatch;
-        tryCatch.SetVerbose(true);
-
-        // Save the old 'event' property so we can restore it later.
-        v8::Local<v8::Value> savedEvent = V8HiddenValue::getHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()));
-        tryCatch.Reset();
-
-        // Make the event available in the global object, so LocalDOMWindow can expose it.
-        V8HiddenValue::setHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()), jsEvent);
-        tryCatch.Reset();
-
-        returnValue = callListenerFunction(jsEvent, event);
-        if (tryCatch.HasCaught())
-            event->target()->uncaughtExceptionInEventHandler();
-
-        if (!tryCatch.CanContinue()) { // Result of TerminateExecution().
-            if (scriptState()->executionContext()->isWorkerGlobalScope())
-                toWorkerGlobalScope(scriptState()->executionContext())->script()->forbidExecution();
-            return;
-        }
-        tryCatch.Reset();
-
-        // Restore the old event. This must be done for all exit paths through this method.
-        if (savedEvent.IsEmpty())
-            V8HiddenValue::setHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()), v8::Undefined(isolate()));
-        else
-            V8HiddenValue::setHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()), savedEvent);
-        tryCatch.Reset();
-    }
-
-    if (returnValue.IsEmpty())
-        return;
-
-    if (m_isAttribute && !returnValue->IsNull() && !returnValue->IsUndefined() && event->isBeforeUnloadEvent()) {
-        TOSTRING_VOID(V8StringResource<>, stringReturnValue, returnValue);
-        toBeforeUnloadEvent(event)->setReturnValue(stringReturnValue);
-    }
-
-    if (m_isAttribute && shouldPreventDefault(returnValue))
-        event->preventDefault();
-}
-
-bool V8AbstractEventListener::shouldPreventDefault(v8::Local<v8::Value> returnValue)
-{
-    // Prevent default action if the return value is false in accord with the spec
-    // http://www.w3.org/TR/html5/webappapis.html#event-handler-attributes
-    return returnValue->IsBoolean() && !returnValue->BooleanValue();
-}
-
-v8::Local<v8::Object> V8AbstractEventListener::getReceiverObject(Event* event)
-{
-    v8::Local<v8::Object> listener = m_listener.newLocal(isolate());
-    if (!m_listener.isEmpty() && !listener->IsFunction())
-        return listener;
-
-    EventTarget* target = event->currentTarget();
-    v8::Handle<v8::Value> value = toV8(target, scriptState()->context()->Global(), isolate());
-    if (value.IsEmpty())
-        return v8::Local<v8::Object>();
-    return v8::Local<v8::Object>::New(isolate(), v8::Handle<v8::Object>::Cast(value));
-}
-
-bool V8AbstractEventListener::belongsToTheCurrentWorld() const
-{
-    return isolate()->InContext() && &world() == &DOMWrapperWorld::current(isolate());
-}
-
-void V8AbstractEventListener::setWeakCallback(const v8::WeakCallbackData<v8::Object, V8AbstractEventListener> &data)
-{
-    data.GetParameter()->m_listener.clear();
-}
-
-} // namespace WebCore