ScriptExecutionContext.cpp [plain text]
#include "config.h"
#include "ScriptExecutionContext.h"
#include "CachedScript.h"
#include "DOMTimer.h"
#include "ErrorEvent.h"
#include "MessagePort.h"
#include "PublicURLManager.h"
#include "ScriptCallStack.h"
#include "Settings.h"
#include "WorkerContext.h"
#include "WorkerThread.h"
#include <wtf/MainThread.h>
#include "JSDOMWindow.h"
#if PLATFORM(IOS)
#include "Document.h"
#endif
#if ENABLE(SQL_DATABASE)
#include "DatabaseContext.h"
#endif
namespace WebCore {
class ProcessMessagesSoonTask : public ScriptExecutionContext::Task {
public:
static PassOwnPtr<ProcessMessagesSoonTask> create()
{
return adoptPtr(new ProcessMessagesSoonTask);
}
virtual void performTask(ScriptExecutionContext* context)
{
context->dispatchMessagePortEvents();
}
};
class ScriptExecutionContext::PendingException {
WTF_MAKE_NONCOPYABLE(PendingException);
public:
PendingException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
: m_errorMessage(errorMessage)
, m_lineNumber(lineNumber)
, m_columnNumber(columnNumber)
, m_sourceURL(sourceURL)
, m_callStack(callStack)
{
}
String m_errorMessage;
int m_lineNumber;
int m_columnNumber;
String m_sourceURL;
RefPtr<ScriptCallStack> m_callStack;
};
void ScriptExecutionContext::AddConsoleMessageTask::performTask(ScriptExecutionContext* context)
{
context->addConsoleMessage(m_source, m_level, m_message);
}
ScriptExecutionContext::ScriptExecutionContext()
: m_iteratingActiveDOMObjects(false)
, m_inDestructor(false)
, m_circularSequentialID(0)
, m_inDispatchErrorEvent(false)
, m_activeDOMObjectsAreSuspended(false)
, m_reasonForSuspendingActiveDOMObjects(static_cast<ActiveDOMObject::ReasonForSuspension>(-1))
, m_activeDOMObjectsAreStopped(false)
{
}
ScriptExecutionContext::~ScriptExecutionContext()
{
m_inDestructor = true;
for (HashSet<ContextDestructionObserver*>::iterator iter = m_destructionObservers.begin(); iter != m_destructionObservers.end(); iter = m_destructionObservers.begin()) {
ContextDestructionObserver* observer = *iter;
m_destructionObservers.remove(observer);
ASSERT(observer->scriptExecutionContext() == this);
observer->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();
}
#if ENABLE(BLOB)
if (m_publicURLManager)
m_publicURLManager->contextDestroyed();
#endif
}
void ScriptExecutionContext::processMessagePortMessagesSoon()
{
postTask(ProcessMessagesSoonTask::create());
}
void ScriptExecutionContext::dispatchMessagePortEvents()
{
RefPtr<ScriptExecutionContext> protect(this);
Vector<MessagePort*> ports;
copyToVector(m_messagePorts, ports);
unsigned portCount = ports.size();
for (unsigned i = 0; i < portCount; ++i) {
MessagePort* port = ports[i];
if (m_messagePorts.contains(port) && port->started())
port->dispatchMessages();
}
}
void ScriptExecutionContext::createdMessagePort(MessagePort* port)
{
ASSERT(port);
#if ENABLE(WORKERS)
#if PLATFORM(IOS)
ASSERT((isDocument() && (isMainThread() || pthread_main_np()))
|| (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
#else
ASSERT((isDocument() && isMainThread())
|| (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
#endif
#endif
m_messagePorts.add(port);
}
void ScriptExecutionContext::destroyedMessagePort(MessagePort* port)
{
ASSERT(port);
#if ENABLE(WORKERS)
#if PLATFORM(IOS)
ASSERT((isDocument() && (isMainThread() || pthread_main_np()))
|| (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
#else
ASSERT((isDocument() && isMainThread())
|| (isWorkerContext() && currentThread() == static_cast<WorkerContext*>(this)->thread()->threadID()));
#endif
#endif
m_messagePorts.remove(port);
}
bool ScriptExecutionContext::canSuspendActiveDOMObjects()
{
m_iteratingActiveDOMObjects = true;
ActiveDOMObjectsSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (ActiveDOMObjectsSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT((*iter)->scriptExecutionContext() == this);
ASSERT((*iter)->suspendIfNeededCalled());
if (!(*iter)->canSuspend()) {
m_iteratingActiveDOMObjects = false;
return false;
}
}
m_iteratingActiveDOMObjects = false;
return true;
}
void ScriptExecutionContext::suspendActiveDOMObjects(ActiveDOMObject::ReasonForSuspension why)
{
#if PLATFORM(IOS)
if (m_activeDOMObjectsAreSuspended) {
ASSERT(m_reasonForSuspendingActiveDOMObjects == ActiveDOMObject::DocumentWillBePaused);
return;
}
#endif
m_iteratingActiveDOMObjects = true;
ActiveDOMObjectsSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (ActiveDOMObjectsSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT((*iter)->scriptExecutionContext() == this);
ASSERT((*iter)->suspendIfNeededCalled());
(*iter)->suspend(why);
}
m_iteratingActiveDOMObjects = false;
m_activeDOMObjectsAreSuspended = true;
m_reasonForSuspendingActiveDOMObjects = why;
}
void ScriptExecutionContext::resumeActiveDOMObjects(ActiveDOMObject::ReasonForSuspension why)
{
if (m_reasonForSuspendingActiveDOMObjects != why)
return;
m_activeDOMObjectsAreSuspended = false;
m_iteratingActiveDOMObjects = true;
ActiveDOMObjectsSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (ActiveDOMObjectsSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT((*iter)->scriptExecutionContext() == this);
ASSERT((*iter)->suspendIfNeededCalled());
(*iter)->resume();
}
m_iteratingActiveDOMObjects = false;
}
void ScriptExecutionContext::stopActiveDOMObjects()
{
if (m_activeDOMObjectsAreStopped)
return;
m_activeDOMObjectsAreStopped = true;
m_iteratingActiveDOMObjects = true;
ActiveDOMObjectsSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
for (ActiveDOMObjectsSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
ASSERT((*iter)->scriptExecutionContext() == this);
ASSERT((*iter)->suspendIfNeededCalled());
(*iter)->stop();
}
m_iteratingActiveDOMObjects = false;
closeMessagePorts();
}
void ScriptExecutionContext::suspendActiveDOMObjectIfNeeded(ActiveDOMObject* object)
{
ASSERT(m_activeDOMObjects.contains(object));
if (m_activeDOMObjectsAreSuspended)
object->suspend(m_reasonForSuspendingActiveDOMObjects);
if (m_activeDOMObjectsAreStopped)
object->stop();
}
void ScriptExecutionContext::didCreateActiveDOMObject(ActiveDOMObject* object)
{
ASSERT(object);
ASSERT(!m_inDestructor);
if (m_iteratingActiveDOMObjects)
CRASH();
m_activeDOMObjects.add(object);
}
void ScriptExecutionContext::willDestroyActiveDOMObject(ActiveDOMObject* object)
{
ASSERT(object);
if (m_iteratingActiveDOMObjects)
CRASH();
m_activeDOMObjects.remove(object);
}
void ScriptExecutionContext::didCreateDestructionObserver(ContextDestructionObserver* observer)
{
ASSERT(observer);
ASSERT(!m_inDestructor);
m_destructionObservers.add(observer);
}
void ScriptExecutionContext::willDestroyDestructionObserver(ContextDestructionObserver* observer)
{
ASSERT(observer);
m_destructionObservers.remove(observer);
}
void ScriptExecutionContext::closeMessagePorts() {
HashSet<MessagePort*>::iterator messagePortsEnd = m_messagePorts.end();
for (HashSet<MessagePort*>::iterator iter = m_messagePorts.begin(); iter != messagePortsEnd; ++iter) {
ASSERT((*iter)->scriptExecutionContext() == this);
(*iter)->close();
}
}
bool ScriptExecutionContext::sanitizeScriptError(String& errorMessage, int& lineNumber, String& sourceURL, CachedScript* cachedScript)
{
KURL targetURL = completeURL(sourceURL);
if (securityOrigin()->canRequest(targetURL) || (cachedScript && cachedScript->passesAccessControlCheck(securityOrigin())))
return false;
errorMessage = "Script error.";
sourceURL = String();
lineNumber = 0;
return true;
}
void ScriptExecutionContext::reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack, CachedScript* cachedScript)
{
if (m_inDispatchErrorEvent) {
if (!m_pendingExceptions)
m_pendingExceptions = adoptPtr(new Vector<OwnPtr<PendingException> >());
m_pendingExceptions->append(adoptPtr(new PendingException(errorMessage, lineNumber, columnNumber, sourceURL, callStack)));
return;
}
if (!dispatchErrorEvent(errorMessage, lineNumber, sourceURL, cachedScript))
logExceptionToConsole(errorMessage, sourceURL, lineNumber, columnNumber, callStack);
if (!m_pendingExceptions)
return;
for (size_t i = 0; i < m_pendingExceptions->size(); i++) {
PendingException* e = m_pendingExceptions->at(i).get();
logExceptionToConsole(e->m_errorMessage, e->m_sourceURL, e->m_lineNumber, e->m_columnNumber, e->m_callStack);
}
m_pendingExceptions.clear();
}
void ScriptExecutionContext::addConsoleMessage(MessageSource source, MessageLevel level, const String& message, const String& sourceURL, unsigned lineNumber, unsigned columnNumber, ScriptState* state, unsigned long requestIdentifier)
{
addMessage(source, level, message, sourceURL, lineNumber, columnNumber, 0, state, requestIdentifier);
}
bool ScriptExecutionContext::dispatchErrorEvent(const String& errorMessage, int lineNumber, const String& sourceURL, CachedScript* cachedScript)
{
EventTarget* target = errorEventTarget();
if (!target)
return false;
#if PLATFORM(IOS)
if (target == target->toDOMWindow() && isDocument()) {
Document* document = static_cast<Document*>(this);
if (document->settings() && !document->settings()->shouldDispatchJavaScriptWindowOnErrorEvents())
return false;
}
#endif
String message = errorMessage;
int line = lineNumber;
String sourceName = sourceURL;
sanitizeScriptError(message, line, sourceName, cachedScript);
ASSERT(!m_inDispatchErrorEvent);
m_inDispatchErrorEvent = true;
RefPtr<ErrorEvent> errorEvent = ErrorEvent::create(message, sourceName, line);
target->dispatchEvent(errorEvent);
m_inDispatchErrorEvent = false;
return errorEvent->defaultPrevented();
}
int ScriptExecutionContext::circularSequentialID()
{
++m_circularSequentialID;
if (m_circularSequentialID <= 0)
m_circularSequentialID = 1;
return m_circularSequentialID;
}
#if ENABLE(BLOB)
PublicURLManager& ScriptExecutionContext::publicURLManager()
{
if (!m_publicURLManager)
m_publicURLManager = PublicURLManager::create();
return *m_publicURLManager;
}
#endif
void ScriptExecutionContext::adjustMinimumTimerInterval(double oldMinimumTimerInterval)
{
if (minimumTimerInterval() != oldMinimumTimerInterval) {
for (TimeoutMap::iterator iter = m_timeouts.begin(); iter != m_timeouts.end(); ++iter) {
DOMTimer* timer = iter->value;
timer->adjustMinimumTimerInterval(oldMinimumTimerInterval);
}
}
}
double ScriptExecutionContext::minimumTimerInterval() const
{
return Settings::defaultMinDOMTimerInterval();
}
void ScriptExecutionContext::didChangeTimerAlignmentInterval()
{
for (TimeoutMap::iterator iter = m_timeouts.begin(); iter != m_timeouts.end(); ++iter) {
DOMTimer* timer = iter->value;
timer->didChangeAlignmentInterval();
}
}
double ScriptExecutionContext::timerAlignmentInterval() const
{
return Settings::defaultDOMTimerAlignmentInterval();
}
ScriptExecutionContext::Task::~Task()
{
}
JSC::VM* ScriptExecutionContext::vm()
{
if (isDocument())
return JSDOMWindow::commonVM();
#if ENABLE(WORKERS)
if (isWorkerContext())
return static_cast<WorkerContext*>(this)->script()->vm();
#endif
ASSERT_NOT_REACHED();
return 0;
}
#if ENABLE(SQL_DATABASE)
void ScriptExecutionContext::setDatabaseContext(DatabaseContext* databaseContext)
{
ASSERT(!m_databaseContext);
m_databaseContext = databaseContext;
}
#endif
}