1/*
2 * Copyright (C) 2010 Google, Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ScriptRunner_h
27#define ScriptRunner_h
28
29#include "CachedResourceHandle.h"
30#include "Timer.h"
31#include <wtf/Noncopyable.h>
32#include <wtf/PassRefPtr.h>
33#include <wtf/Vector.h>
34
35namespace WebCore {
36
37class CachedScript;
38class Document;
39class PendingScript;
40class ScriptElement;
41
42class ScriptRunner {
43    WTF_MAKE_NONCOPYABLE(ScriptRunner); WTF_MAKE_FAST_ALLOCATED;
44public:
45    static PassOwnPtr<ScriptRunner> create(Document* document) { return new ScriptRunner(document); }
46    ~ScriptRunner();
47
48    enum ExecutionType { ASYNC_EXECUTION, IN_ORDER_EXECUTION };
49    void queueScriptForExecution(ScriptElement*, CachedResourceHandle<CachedScript>, ExecutionType);
50    bool hasPendingScripts() const { return !m_scriptsToExecuteSoon.isEmpty() || !m_scriptsToExecuteInOrder.isEmpty(); }
51    void suspend();
52    void resume();
53    void notifyInOrderScriptReady();
54
55private:
56    ScriptRunner(Document*);
57
58    void timerFired(Timer<ScriptRunner>*);
59
60    Document* m_document;
61    Vector<PendingScript> m_scriptsToExecuteInOrder;
62    Vector<PendingScript> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
63    Timer<ScriptRunner> m_timer;
64};
65
66}
67
68#endif
69