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 "core/fetch/ResourcePtr.h"
30#include "platform/Timer.h"
31#include "platform/heap/Handle.h"
32#include "wtf/HashMap.h"
33#include "wtf/Noncopyable.h"
34#include "wtf/PassOwnPtr.h"
35#include "wtf/Vector.h"
36
37namespace blink {
38
39class ScriptResource;
40class Document;
41class PendingScript;
42class ScriptLoader;
43
44class ScriptRunner FINAL : public NoBaseWillBeGarbageCollectedFinalized<ScriptRunner> {
45    WTF_MAKE_NONCOPYABLE(ScriptRunner); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
46public:
47    static PassOwnPtrWillBeRawPtr<ScriptRunner> create(Document* document)
48    {
49        return adoptPtrWillBeNoop(new ScriptRunner(document));
50    }
51    ~ScriptRunner();
52
53    enum ExecutionType { ASYNC_EXECUTION, IN_ORDER_EXECUTION };
54    void queueScriptForExecution(ScriptLoader*, ResourcePtr<ScriptResource>, ExecutionType);
55    bool hasPendingScripts() const { return !m_scriptsToExecuteSoon.isEmpty() || !m_scriptsToExecuteInOrder.isEmpty() || !m_pendingAsyncScripts.isEmpty(); }
56    void suspend();
57    void resume();
58    void notifyScriptReady(ScriptLoader*, ExecutionType);
59    void notifyScriptLoadError(ScriptLoader*, ExecutionType);
60
61    void movePendingAsyncScript(ScriptRunner*, ScriptLoader*);
62
63    void trace(Visitor*);
64
65private:
66    explicit ScriptRunner(Document*);
67
68    void timerFired(Timer<ScriptRunner>*);
69
70    void addPendingAsyncScript(ScriptLoader*, const PendingScript&);
71
72    RawPtrWillBeMember<Document> m_document;
73    // FIXME: Oilpan: consider using heap vectors and hash map here;
74    // PendingScript does have a (trivial) destructor, however.
75    Vector<PendingScript> m_scriptsToExecuteInOrder;
76    Vector<PendingScript> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
77    WillBeHeapHashMap<ScriptLoader*, PendingScript> m_pendingAsyncScripts;
78    Timer<ScriptRunner> m_timer;
79};
80
81}
82
83#endif
84