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/*
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "JSEventListener.h"
#include "Event.h"
#include "Frame.h"
#include "JSEvent.h"
#include "JSEventTarget.h"
#include "JSMainThreadExecState.h"
#include <runtime/JSLock.h>
#include <wtf/RefCountedLeakCounter.h>
using namespace JSC;
namespace WebCore {
JSEventListener::JSEventListener(JSObject* function, JSObject* wrapper, bool isAttribute, DOMWrapperWorld* isolatedWorld)
: EventListener(JSEventListenerType)
, m_wrapper(*isolatedWorld->globalData(), wrapper)
, m_isAttribute(isAttribute)
, m_isolatedWorld(isolatedWorld)
{
m_jsFunction.set(*m_isolatedWorld->globalData(), wrapper, function);
}
JSEventListener::~JSEventListener()
{
}
JSObject* JSEventListener::initializeJSFunction(ScriptExecutionContext*) const
{
ASSERT_NOT_REACHED();
return 0;
}
void JSEventListener::markJSFunction(MarkStack& markStack)
{
if (m_jsFunction)
markStack.append(&m_jsFunction);
}
void JSEventListener::handleEvent(ScriptExecutionContext* scriptExecutionContext, Event* event)
{
ASSERT(scriptExecutionContext);
if (!scriptExecutionContext || scriptExecutionContext->isJSExecutionTerminated())
return;
JSLock lock(SilenceAssertionsOnly);
JSObject* jsFunction = this->jsFunction(scriptExecutionContext);
if (!jsFunction)
return;
JSDOMGlobalObject* globalObject = toJSDOMGlobalObject(scriptExecutionContext, m_isolatedWorld.get());
if (!globalObject)
return;
if (scriptExecutionContext->isDocument()) {
JSDOMWindow* window = static_cast<JSDOMWindow*>(globalObject);
Frame* frame = window->impl()->frame();
if (!frame)
return;
// The window must still be active in its frame. See <https://bugs.webkit.org/show_bug.cgi?id=21921>.
// FIXME: A better fix for this may be to change DOMWindow::frame() to not return a frame the detached window used to be in.
if (frame->domWindow() != window->impl())
return;
// FIXME: Is this check needed for other contexts?
ScriptController* script = frame->script();
if (!script->canExecuteScripts(AboutToExecuteScript) || script->isPaused())
return;
}
ExecState* exec = globalObject->globalExec();
JSValue handleEventFunction = jsFunction->get(exec, Identifier(exec, "handleEvent"));
CallData callData;
CallType callType = getCallData(handleEventFunction, callData);
if (callType == CallTypeNone) {
handleEventFunction = JSValue();
callType = jsFunction->getCallData(callData);
}
if (callType != CallTypeNone) {
ref();
MarkedArgumentBuffer args;
args.append(toJS(exec, globalObject, event));
Event* savedEvent = globalObject->currentEvent();
globalObject->setCurrentEvent(event);
JSGlobalData& globalData = globalObject->globalData();
DynamicGlobalObjectScope globalObjectScope(globalData, globalData.dynamicGlobalObject ? globalData.dynamicGlobalObject : globalObject);
globalData.timeoutChecker.start();
JSValue retval;
if (handleEventFunction) {
retval = scriptExecutionContext->isDocument()
? JSMainThreadExecState::call(exec, handleEventFunction, callType, callData, jsFunction, args)
: JSC::call(exec, handleEventFunction, callType, callData, jsFunction, args);
} else {
JSValue currentTarget = toJS(exec, globalObject, event->currentTarget());
retval = scriptExecutionContext->isDocument()
? JSMainThreadExecState::call(exec, jsFunction, callType, callData, currentTarget, args)
: JSC::call(exec, jsFunction, callType, callData, currentTarget, args);
}
globalData.timeoutChecker.stop();
globalObject->setCurrentEvent(savedEvent);
if (exec->hadException()) {
event->target()->uncaughtExceptionInEventHandler();
reportCurrentException(exec);
} else {
if (!retval.isUndefinedOrNull() && event->storesResultAsString())
event->storeResult(ustringToString(retval.toString(exec)));
if (m_isAttribute) {
bool retvalbool;
if (retval.getBoolean(retvalbool) && !retvalbool)
event->preventDefault();
}
}
deref();
}
}
bool JSEventListener::virtualisAttribute() const
{
return m_isAttribute;
}
bool JSEventListener::operator==(const EventListener& listener)
{
if (const JSEventListener* jsEventListener = JSEventListener::cast(&listener))
return m_jsFunction == jsEventListener->m_jsFunction && m_isAttribute == jsEventListener->m_isAttribute;
return false;
}
} // namespace WebCore
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