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/*
* Copyright (C) 2008 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "ScriptExecutionContext.h"
#include "ActiveDOMObject.h"
#include "Document.h"
#include "MessagePort.h"
#include "SecurityOrigin.h"
#include "WorkerContext.h"
#include "WorkerThread.h"
#include <wtf/MainThread.h>
#include <wtf/PassRefPtr.h>
namespace WebCore {
class ProcessMessagesSoonTask : public ScriptExecutionContext::Task {
public:
static PassRefPtr<ProcessMessagesSoonTask> create()
{
return adoptRef(new ProcessMessagesSoonTask);
}
virtual void performTask(ScriptExecutionContext* context)
{
context->dispatchMessagePortEvents();
}
};
ScriptExecutionContext::ScriptExecutionContext()
{
}
ScriptExecutionContext::~ScriptExecutionContext()
{
HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT(iter->first->scriptExecutionContext() == this);
iter->first->contextDestroyed();
}
HashSet<MessagePort*>::iterator messagePortsEnd = m_messagePorts.end();
for (HashSet<MessagePort*>::iterator iter = m_messagePorts.begin(); iter != messagePortsEnd; ++iter) {
ASSERT((*iter)->scriptExecutionContext() == this);
(*iter)->contextDestroyed();
}
}
void ScriptExecutionContext::processMessagePortMessagesSoon()
{
postTask(ProcessMessagesSoonTask::create());
}
void ScriptExecutionContext::dispatchMessagePortEvents()
{
RefPtr<ScriptExecutionContext> protect(this);
// Make a frozen copy.
Vector<MessagePort*> ports;
copyToVector(m_messagePorts, ports);
unsigned portCount = ports.size();
for (unsigned i = 0; i < portCount; ++i) {
MessagePort* port = ports[i];
// The port may be destroyed, and another one created at the same address, but this is safe, as the worst that can happen
// as a result is that dispatchMessages() will be called needlessly.
if (m_messagePorts.contains(port) && port->started())
port->dispatchMessages();
}
}
void ScriptExecutionContext::createdMessagePort(MessagePort* port)
{
ASSERT(port);
#if ENABLE(WORKERS)
ASSERT((isDocument() && isMainThread())
|| (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
#endif
m_messagePorts.add(port);
}
void ScriptExecutionContext::destroyedMessagePort(MessagePort* port)
{
ASSERT(port);
#if ENABLE(WORKERS)
ASSERT((isDocument() && isMainThread())
|| (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
#endif
m_messagePorts.remove(port);
}
bool ScriptExecutionContext::canSuspendActiveDOMObjects()
{
// No protection against m_activeDOMObjects changing during iteration: canSuspend() shouldn't execute arbitrary JS.
HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT(iter->first->scriptExecutionContext() == this);
if (!iter->first->canSuspend())
return false;
}
return true;
}
void ScriptExecutionContext::suspendActiveDOMObjects()
{
// No protection against m_activeDOMObjects changing during iteration: suspend() shouldn't execute arbitrary JS.
HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT(iter->first->scriptExecutionContext() == this);
iter->first->suspend();
}
}
void ScriptExecutionContext::resumeActiveDOMObjects()
{
// No protection against m_activeDOMObjects changing during iteration: resume() shouldn't execute arbitrary JS.
HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT(iter->first->scriptExecutionContext() == this);
iter->first->resume();
}
}
void ScriptExecutionContext::stopActiveDOMObjects()
{
// No protection against m_activeDOMObjects changing during iteration: stop() shouldn't execute arbitrary JS.
HashMap<ActiveDOMObject*, void*>::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (HashMap<ActiveDOMObject*, void*>::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT(iter->first->scriptExecutionContext() == this);
iter->first->stop();
}
}
void ScriptExecutionContext::createdActiveDOMObject(ActiveDOMObject* object, void* upcastPointer)
{
ASSERT(object);
ASSERT(upcastPointer);
m_activeDOMObjects.add(object, upcastPointer);
}
void ScriptExecutionContext::destroyedActiveDOMObject(ActiveDOMObject* object)
{
ASSERT(object);
m_activeDOMObjects.remove(object);
}
void ScriptExecutionContext::setSecurityOrigin(PassRefPtr<SecurityOrigin> securityOrigin)
{
m_securityOrigin = securityOrigin;
}
void ScriptExecutionContext::addTimeout(int timeoutId, DOMTimer* timer)
{
ASSERT(!m_timeouts.contains(timeoutId));
m_timeouts.set(timeoutId, timer);
}
void ScriptExecutionContext::removeTimeout(int timeoutId)
{
m_timeouts.remove(timeoutId);
}
DOMTimer* ScriptExecutionContext::findTimeout(int timeoutId)
{
return m_timeouts.get(timeoutId);
}
ScriptExecutionContext::Task::~Task()
{
}
} // namespace WebCore
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