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 "ScriptRunner.h"
28
29#include "CachedScript.h"
30#include "Document.h"
31#include "Element.h"
32#include "PendingScript.h"
33#include "ScriptElement.h"
34
35namespace WebCore {
36
37ScriptRunner::ScriptRunner(Document* document)
38    : m_document(document)
39    , m_timer(this, &ScriptRunner::timerFired)
40{
41    ASSERT(document);
42}
43
44ScriptRunner::~ScriptRunner()
45{
46    for (size_t i = 0; i < m_scriptsToExecuteSoon.size(); ++i)
47        m_document->decrementLoadEventDelayCount();
48    for (size_t i = 0; i < m_scriptsToExecuteInOrder.size(); ++i)
49        m_document->decrementLoadEventDelayCount();
50}
51
52void ScriptRunner::queueScriptForExecution(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript, ExecutionType executionType)
53{
54    ASSERT(scriptElement);
55
56    Element* element = scriptElement->element();
57    ASSERT(element);
58    ASSERT(element->inDocument());
59
60    m_document->incrementLoadEventDelayCount();
61
62    switch (executionType) {
63    case ASYNC_EXECUTION:
64        m_scriptsToExecuteSoon.append(PendingScript(element, cachedScript.get()));
65        if (!m_timer.isActive())
66            m_timer.startOneShot(0);
67        break;
68
69    case IN_ORDER_EXECUTION:
70        m_scriptsToExecuteInOrder.append(PendingScript(element, cachedScript.get()));
71        break;
72
73    default:
74        ASSERT_NOT_REACHED();
75    }
76}
77
78void ScriptRunner::suspend()
79{
80    m_timer.stop();
81}
82
83void ScriptRunner::resume()
84{
85    if (hasPendingScripts())
86        m_timer.startOneShot(0);
87}
88
89void ScriptRunner::notifyInOrderScriptReady()
90{
91    ASSERT(!m_scriptsToExecuteInOrder.isEmpty());
92    m_timer.startOneShot(0);
93}
94
95void ScriptRunner::timerFired(Timer<ScriptRunner>* timer)
96{
97    ASSERT_UNUSED(timer, timer == &m_timer);
98
99    RefPtr<Document> protect(m_document);
100
101    Vector<PendingScript> scripts;
102    scripts.swap(m_scriptsToExecuteSoon);
103
104    size_t numInOrderScriptsToExecute = 0;
105    for (; numInOrderScriptsToExecute < m_scriptsToExecuteInOrder.size() && m_scriptsToExecuteInOrder[numInOrderScriptsToExecute].cachedScript()->isLoaded(); ++numInOrderScriptsToExecute)
106        scripts.append(m_scriptsToExecuteInOrder[numInOrderScriptsToExecute]);
107    if (numInOrderScriptsToExecute)
108        m_scriptsToExecuteInOrder.remove(0, numInOrderScriptsToExecute);
109
110    size_t size = scripts.size();
111    for (size_t i = 0; i < size; ++i) {
112        CachedScript* cachedScript = scripts[i].cachedScript();
113        RefPtr<Element> element = scripts[i].releaseElementAndClear();
114        toScriptElement(element.get())->execute(cachedScript);
115        m_document->decrementLoadEventDelayCount();
116    }
117}
118
119}
120