Source/core/dom/ExecutionContext.cpp

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This source file includes following definitions.
m_callStack
m_activeDOMObjectsAreStopped
hasPendingActivity
suspendActiveDOMObjects
resumeActiveDOMObjects
stopActiveDOMObjects
activeDOMObjectCount
suspendScheduledTasks
resumeScheduledTasks
suspendActiveDOMObjectIfNeeded
shouldSanitizeScriptError
reportException
addConsoleMessage
addConsoleMessage
dispatchErrorEvent
circularSequentialID
installNewTimeout
removeTimeoutByID
publicURLManager
didChangeTimerAlignmentInterval
securityOrigin
contentSecurityPolicy
url
completeURL
disableEval
executingWindow
userAgent
timerAlignmentInterval
postTask
postTask
createLifecycleNotifier
lifecycleNotifier
isIteratingOverObservers
enforceSandboxFlags
/*
 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
 * Copyright (C) 2012 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:
 * 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 "core/dom/ExecutionContext.h"

#include "core/dom/AddConsoleMessageTask.h"
#include "core/dom/ContextLifecycleNotifier.h"
#include "core/dom/ExecutionContextTask.h"
#include "core/events/EventTarget.h"
#include "core/html/PublicURLManager.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/inspector/ScriptCallStack.h"
#include "core/workers/WorkerGlobalScope.h"
#include "core/workers/WorkerThread.h"
#include "wtf/MainThread.h"

namespace WebCore {

class ExecutionContext::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;
};

ExecutionContext::ExecutionContext()
    : m_client(0)
    , m_sandboxFlags(SandboxNone)
    , m_circularSequentialID(0)
    , m_inDispatchErrorEvent(false)
    , m_activeDOMObjectsAreSuspended(false)
    , m_activeDOMObjectsAreStopped(false)
{
}

ExecutionContext::~ExecutionContext()
{
}

bool ExecutionContext::hasPendingActivity()
{
    return lifecycleNotifier().hasPendingActivity();
}

void ExecutionContext::suspendActiveDOMObjects()
{
    lifecycleNotifier().notifySuspendingActiveDOMObjects();
    m_activeDOMObjectsAreSuspended = true;
}

void ExecutionContext::resumeActiveDOMObjects()
{
    m_activeDOMObjectsAreSuspended = false;
    lifecycleNotifier().notifyResumingActiveDOMObjects();
}

void ExecutionContext::stopActiveDOMObjects()
{
    m_activeDOMObjectsAreStopped = true;
    lifecycleNotifier().notifyStoppingActiveDOMObjects();
}

unsigned ExecutionContext::activeDOMObjectCount()
{
    return lifecycleNotifier().activeDOMObjects().size();
}

void ExecutionContext::suspendScheduledTasks()
{
    suspendActiveDOMObjects();
    if (m_client)
        m_client->tasksWereSuspended();
}

void ExecutionContext::resumeScheduledTasks()
{
    resumeActiveDOMObjects();
    if (m_client)
        m_client->tasksWereResumed();
}

void ExecutionContext::suspendActiveDOMObjectIfNeeded(ActiveDOMObject* object)
{
    ASSERT(lifecycleNotifier().contains(object));
    // Ensure all ActiveDOMObjects are suspended also newly created ones.
    if (m_activeDOMObjectsAreSuspended)
        object->suspend();
}

bool ExecutionContext::shouldSanitizeScriptError(const String& sourceURL, AccessControlStatus corsStatus)
{
    return !(securityOrigin()->canRequest(completeURL(sourceURL)) || corsStatus == SharableCrossOrigin);
}

void ExecutionContext::reportException(PassRefPtrWillBeRawPtr<ErrorEvent> event, PassRefPtr<ScriptCallStack> callStack, AccessControlStatus corsStatus)
{
    RefPtrWillBeRawPtr<ErrorEvent> errorEvent = event;
    if (m_inDispatchErrorEvent) {
        if (!m_pendingExceptions)
            m_pendingExceptions = adoptPtr(new Vector<OwnPtr<PendingException> >());
        m_pendingExceptions->append(adoptPtr(new PendingException(errorEvent->messageForConsole(), errorEvent->lineno(), errorEvent->colno(), errorEvent->filename(), callStack)));
        return;
    }

    // First report the original exception and only then all the nested ones.
    if (!dispatchErrorEvent(errorEvent, corsStatus) && m_client)
        m_client->logExceptionToConsole(errorEvent->messageForConsole(), errorEvent->filename(), errorEvent->lineno(), errorEvent->colno(), callStack);

    if (!m_pendingExceptions)
        return;

    for (size_t i = 0; i < m_pendingExceptions->size(); i++) {
        PendingException* e = m_pendingExceptions->at(i).get();
        if (m_client)
            m_client->logExceptionToConsole(e->m_errorMessage, e->m_sourceURL, e->m_lineNumber, e->m_columnNumber, e->m_callStack);
    }
    m_pendingExceptions.clear();
}

void ExecutionContext::addConsoleMessage(MessageSource source, MessageLevel level, const String& message, const String& sourceURL, unsigned lineNumber)
{
    if (!m_client)
        return;
    m_client->addMessage(source, level, message, sourceURL, lineNumber, 0);
}

void ExecutionContext::addConsoleMessage(MessageSource source, MessageLevel level, const String& message, ScriptState* state)
{
    if (!m_client)
        return;
    m_client->addMessage(source, level, message, String(), 0, state);
}

bool ExecutionContext::dispatchErrorEvent(PassRefPtrWillBeRawPtr<ErrorEvent> event, AccessControlStatus corsStatus)
{
    if (!m_client)
        return false;
    EventTarget* target = m_client->errorEventTarget();
    if (!target)
        return false;

    RefPtrWillBeRawPtr<ErrorEvent> errorEvent = event;
    if (shouldSanitizeScriptError(errorEvent->filename(), corsStatus))
        errorEvent = ErrorEvent::createSanitizedError(errorEvent->world());

    ASSERT(!m_inDispatchErrorEvent);
    m_inDispatchErrorEvent = true;
    target->dispatchEvent(errorEvent);
    m_inDispatchErrorEvent = false;
    return errorEvent->defaultPrevented();
}

int ExecutionContext::circularSequentialID()
{
    ++m_circularSequentialID;
    if (m_circularSequentialID <= 0)
        m_circularSequentialID = 1;
    return m_circularSequentialID;
}

int ExecutionContext::installNewTimeout(PassOwnPtr<ScheduledAction> action, int timeout, bool singleShot)
{
    int timeoutID;
    while (true) {
        timeoutID = circularSequentialID();
        if (!m_timeouts.contains(timeoutID))
            break;
    }
    TimeoutMap::AddResult result = m_timeouts.add(timeoutID, DOMTimer::create(this, action, timeout, singleShot, timeoutID));
    ASSERT(result.isNewEntry);
    DOMTimer* timer = result.storedValue->value.get();

    timer->suspendIfNeeded();

    return timer->timeoutID();
}

void ExecutionContext::removeTimeoutByID(int timeoutID)
{
    if (timeoutID <= 0)
        return;
    m_timeouts.remove(timeoutID);
}

PublicURLManager& ExecutionContext::publicURLManager()
{
    if (!m_publicURLManager)
        m_publicURLManager = PublicURLManager::create(this);
    return *m_publicURLManager;
}

void ExecutionContext::didChangeTimerAlignmentInterval()
{
    for (TimeoutMap::iterator iter = m_timeouts.begin(); iter != m_timeouts.end(); ++iter)
        iter->value->didChangeAlignmentInterval();
}

SecurityOrigin* ExecutionContext::securityOrigin() const
{
    RELEASE_ASSERT(m_client);
    return m_client->securityContext().securityOrigin();
}

ContentSecurityPolicy* ExecutionContext::contentSecurityPolicy() const
{
    RELEASE_ASSERT(m_client);
    return m_client->securityContext().contentSecurityPolicy();
}

const KURL& ExecutionContext::url() const
{
    if (!m_client) {
        DEFINE_STATIC_LOCAL(KURL, emptyURL, ());
        return emptyURL;
    }

    return m_client->virtualURL();
}

KURL ExecutionContext::completeURL(const String& url) const
{

    if (!m_client) {
        DEFINE_STATIC_LOCAL(KURL, emptyURL, ());
        return emptyURL;
    }

    return m_client->virtualCompleteURL(url);
}

void ExecutionContext::disableEval(const String& errorMessage)
{
    if (!m_client)
        return;
    return m_client->disableEval(errorMessage);
}

DOMWindow* ExecutionContext::executingWindow() const
{
    RELEASE_ASSERT(m_client);
    return m_client->executingWindow();
}

String ExecutionContext::userAgent(const KURL& url) const
{
    if (!m_client)
        return String();
    return m_client->userAgent(url);
}

double ExecutionContext::timerAlignmentInterval() const
{
    if (!m_client)
        return DOMTimer::visiblePageAlignmentInterval();
    return m_client->timerAlignmentInterval();
}

void ExecutionContext::postTask(PassOwnPtr<ExecutionContextTask> task)
{
    if (!m_client)
        return;
    m_client->postTask(task);
}

void ExecutionContext::postTask(const Closure& closure)
{
    if (!m_client)
        return;
    m_client->postTask(CallClosureTask::create(closure));
}

PassOwnPtr<LifecycleNotifier<ExecutionContext> > ExecutionContext::createLifecycleNotifier()
{
    return ContextLifecycleNotifier::create(this);
}

ContextLifecycleNotifier& ExecutionContext::lifecycleNotifier()
{
    return static_cast<ContextLifecycleNotifier&>(LifecycleContext<ExecutionContext>::lifecycleNotifier());
}

bool ExecutionContext::isIteratingOverObservers() const
{
    return m_lifecycleNotifier && m_lifecycleNotifier->isIteratingOverObservers();
}

void ExecutionContext::enforceSandboxFlags(SandboxFlags mask)
{
    m_sandboxFlags |= mask;

    RELEASE_ASSERT(m_client);
    // The SandboxOrigin is stored redundantly in the security origin.
    if (isSandboxed(SandboxOrigin) && m_client->securityContext().securityOrigin() && !m_client->securityContext().securityOrigin()->isUnique()) {
        m_client->securityContext().setSecurityOrigin(SecurityOrigin::createUnique());
        m_client->didUpdateSecurityOrigin();
    }
}

} // namespace WebCore
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root/Source/core/dom/ExecutionContext.cpp

DEFINITIONS
