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/HashMap.h>
32#include <wtf/Noncopyable.h>
33#include <wtf/PassOwnPtr.h>
34#include <wtf/PassRefPtr.h>
35#include <wtf/Vector.h>
36
37namespace WebCore {
38
39class CachedScript;
40class Document;
41class PendingScript;
42class ScriptElement;
43
44class ScriptRunner {
45    WTF_MAKE_NONCOPYABLE(ScriptRunner); WTF_MAKE_FAST_ALLOCATED;
46public:
47    static PassOwnPtr<ScriptRunner> create(Document* document) { return adoptPtr(new ScriptRunner(document)); }
48    ~ScriptRunner();
49
50    enum ExecutionType { ASYNC_EXECUTION, IN_ORDER_EXECUTION };
51    void queueScriptForExecution(ScriptElement*, CachedResourceHandle<CachedScript>, ExecutionType);
52    bool hasPendingScripts() const { return !m_scriptsToExecuteSoon.isEmpty() || !m_scriptsToExecuteInOrder.isEmpty() || !m_pendingAsyncScripts.isEmpty(); }
53    void suspend();
54    void resume();
55    void notifyScriptReady(ScriptElement*, ExecutionType);
56
57private:
58    explicit ScriptRunner(Document*);
59
60    void timerFired(Timer<ScriptRunner>*);
61
62    Document* m_document;
63    Vector<PendingScript> m_scriptsToExecuteInOrder;
64    Vector<PendingScript> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
65    HashMap<ScriptElement*, PendingScript> m_pendingAsyncScripts;
66    Timer<ScriptRunner> m_timer;
67};
68
69}
70
71#endif
72