third_party/WebKit/Source/core/frame/DOMWindowTimers.cpp

/*
 * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 * Copyright (C) 2013 Samsung Electronics. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
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 * notice, this list of conditions and the following disclaimer.
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#include "core/frame/DOMWindowTimers.h"

#include "bindings/core/v8/V8GCForContextDispose.h"
#include "core/dom/Document.h"
#include "core/dom/ExecutionContext.h"
#include "core/events/EventTarget.h"
#include "core/frame/DOMTimer.h"
#include "core/frame/csp/ContentSecurityPolicy.h"
#include "core/workers/WorkerGlobalScope.h"

namespace blink {

namespace DOMWindowTimers {

static bool isAllowed(ScriptState* scriptState, ExecutionContext* executionContext, bool isEval)
{
    if (executionContext->isDocument()) {
        Document* document = static_cast<Document*>(executionContext);
        if (isEval && !document->contentSecurityPolicy()->allowEval(scriptState, ContentSecurityPolicy::SendReport, ContentSecurityPolicy::WillNotThrowException))
            return false;
        return true;
    }
    if (executionContext->isWorkerGlobalScope()) {
        WorkerGlobalScope* workerGlobalScope = static_cast<WorkerGlobalScope*>(executionContext);
        if (!workerGlobalScope->scriptController())
            return false;
        ContentSecurityPolicy* policy = workerGlobalScope->contentSecurityPolicy();
        if (isEval && policy && !policy->allowEval(scriptState, ContentSecurityPolicy::SendReport, ContentSecurityPolicy::WillNotThrowException))
            return false;
        return true;
    }
    ASSERT_NOT_REACHED();
    return false;
}

int setTimeout(ScriptState* scriptState, EventTarget& eventTarget, const ScriptValue& handler, int timeout, const Vector<ScriptValue>& arguments)
{
    ExecutionContext* executionContext = eventTarget.getExecutionContext();
    if (!isAllowed(scriptState, executionContext, false))
        return 0;
    if (timeout >= 0 && executionContext->isDocument()) {
        // FIXME: Crude hack that attempts to pass idle time to V8. This should
        // be done using the scheduler instead.
        V8GCForContextDispose::instance().notifyIdle();
    }
    ScheduledAction* action = ScheduledAction::create(scriptState, handler, arguments);
    return DOMTimer::install(executionContext, action, timeout, true);
}

int setTimeout(ScriptState* scriptState, EventTarget& eventTarget, const String& handler, int timeout, const Vector<ScriptValue>&)
{
    ExecutionContext* executionContext = eventTarget.getExecutionContext();
    if (!isAllowed(scriptState, executionContext, true))
        return 0;
    // Don't allow setting timeouts to run empty functions.  Was historically a
    // perfomance issue.
    if (handler.isEmpty())
        return 0;
    if (timeout >= 0 && executionContext->isDocument()) {
        // FIXME: Crude hack that attempts to pass idle time to V8. This should
        // be done using the scheduler instead.
        V8GCForContextDispose::instance().notifyIdle();
    }
    ScheduledAction* action = ScheduledAction::create(scriptState, handler);
    return DOMTimer::install(executionContext, action, timeout, true);
}

int setInterval(ScriptState* scriptState, EventTarget& eventTarget, const ScriptValue& handler, int timeout, const Vector<ScriptValue>& arguments)
{
    ExecutionContext* executionContext = eventTarget.getExecutionContext();
    if (!isAllowed(scriptState, executionContext, false))
        return 0;
    ScheduledAction* action = ScheduledAction::create(scriptState, handler, arguments);
    return DOMTimer::install(executionContext, action, timeout, false);
}

int setInterval(ScriptState* scriptState, EventTarget& eventTarget, const String& handler, int timeout, const Vector<ScriptValue>&)
{
    ExecutionContext* executionContext = eventTarget.getExecutionContext();
    if (!isAllowed(scriptState, executionContext, true))
        return 0;
    // Don't allow setting timeouts to run empty functions.  Was historically a
    // perfomance issue.
    if (handler.isEmpty())
        return 0;
    ScheduledAction* action = ScheduledAction::create(scriptState, handler);
    return DOMTimer::install(executionContext, action, timeout, false);
}

void clearTimeout(EventTarget& eventTarget, int timeoutID)
{
    if (ExecutionContext* context = eventTarget.getExecutionContext())
        DOMTimer::removeByID(context, timeoutID);
}

void clearInterval(EventTarget& eventTarget, int timeoutID)
{
    if (ExecutionContext* context = eventTarget.getExecutionContext())
        DOMTimer::removeByID(context, timeoutID);
}

} // namespace DOMWindowTimers

} // namespace blink