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#include "config.h"
27#include "core/dom/PendingScript.h"
28
29#include "bindings/core/v8/ScriptSourceCode.h"
30#include "bindings/core/v8/ScriptStreamer.h"
31#include "core/dom/Element.h"
32#include "core/fetch/ScriptResource.h"
33
34namespace blink {
35
36PendingScript::~PendingScript()
37{
38}
39
40void PendingScript::watchForLoad(ScriptResourceClient* client)
41{
42    ASSERT(!m_watchingForLoad);
43    ASSERT(!isReady());
44    if (m_streamer) {
45        m_streamer->addClient(client);
46    } else {
47        // addClient() will call notifyFinished() if the load is
48        // complete. Callers do not expect to be re-entered from this call, so
49        // they should not become a client of an already-loaded Resource.
50        resource()->addClient(client);
51    }
52    m_watchingForLoad = true;
53}
54
55void PendingScript::stopWatchingForLoad(ScriptResourceClient* client)
56{
57    if (!m_watchingForLoad)
58        return;
59    ASSERT(resource());
60    if (m_streamer) {
61        m_streamer->cancel();
62        m_streamer->removeClient(client);
63        m_streamer.clear();
64    } else {
65        resource()->removeClient(client);
66    }
67    m_watchingForLoad = false;
68}
69
70PassRefPtrWillBeRawPtr<Element> PendingScript::releaseElementAndClear()
71{
72    setScriptResource(0);
73    m_watchingForLoad = false;
74    m_startingPosition = TextPosition::belowRangePosition();
75    m_streamer.release();
76    return m_element.release();
77}
78
79void PendingScript::setScriptResource(ScriptResource* resource)
80{
81    setResource(resource);
82}
83
84void PendingScript::notifyFinished(Resource* resource)
85{
86    if (m_streamer)
87        m_streamer->notifyFinished(resource);
88}
89
90void PendingScript::notifyAppendData(ScriptResource* resource)
91{
92    if (m_streamer)
93        m_streamer->notifyAppendData(resource);
94}
95
96void PendingScript::trace(Visitor* visitor)
97{
98    visitor->trace(m_element);
99}
100
101ScriptSourceCode PendingScript::getSource(const KURL& documentURL, bool& errorOccurred) const
102{
103    if (resource()) {
104        errorOccurred = resource()->errorOccurred();
105        ASSERT(resource()->isLoaded());
106        if (m_streamer && !m_streamer->streamingSuppressed())
107            return ScriptSourceCode(m_streamer, resource());
108        return ScriptSourceCode(resource());
109    }
110    errorOccurred = false;
111    return ScriptSourceCode(m_element->textContent(), documentURL, startingPosition());
112}
113
114bool PendingScript::isReady() const
115{
116    if (resource() && !resource()->isLoaded())
117        return false;
118    if (m_streamer && !m_streamer->isFinished())
119        return false;
120    return true;
121}
122
123}
124