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 "Element.h"
31#include "PendingScript.h"
32#include "ScriptElement.h"
33
34namespace WebCore {
35
36ScriptRunner::ScriptRunner(Document& document)
37    : m_document(document)
38    , m_timer(this, &ScriptRunner::timerFired)
39{
40}
41
42ScriptRunner::~ScriptRunner()
43{
44    for (size_t i = 0; i < m_scriptsToExecuteSoon.size(); ++i)
45        m_document.decrementLoadEventDelayCount();
46    for (size_t i = 0; i < m_scriptsToExecuteInOrder.size(); ++i)
47        m_document.decrementLoadEventDelayCount();
48    for (int i = 0; i < m_pendingAsyncScripts.size(); ++i)
49        m_document.decrementLoadEventDelayCount();
50}
51
52void ScriptRunner::queueScriptForExecution(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript, ExecutionType executionType)
53{
54    ASSERT(scriptElement);
55    ASSERT(cachedScript.get());
56
57    Element& element = scriptElement->element();
58    ASSERT(element.inDocument());
59
60    m_document.incrementLoadEventDelayCount();
61
62    switch (executionType) {
63    case ASYNC_EXECUTION:
64        m_pendingAsyncScripts.add(scriptElement, PendingScript(&element, cachedScript.get()));
65        break;
66
67    case IN_ORDER_EXECUTION:
68        m_scriptsToExecuteInOrder.append(PendingScript(&element, cachedScript.get()));
69        break;
70    }
71}
72
73void ScriptRunner::suspend()
74{
75    m_timer.stop();
76}
77
78void ScriptRunner::resume()
79{
80    if (hasPendingScripts())
81        m_timer.startOneShot(0);
82}
83
84void ScriptRunner::notifyScriptReady(ScriptElement* scriptElement, ExecutionType executionType)
85{
86    switch (executionType) {
87    case ASYNC_EXECUTION:
88        ASSERT(m_pendingAsyncScripts.contains(scriptElement));
89        m_scriptsToExecuteSoon.append(m_pendingAsyncScripts.take(scriptElement));
90        break;
91
92    case IN_ORDER_EXECUTION:
93        ASSERT(!m_scriptsToExecuteInOrder.isEmpty());
94        break;
95    }
96    m_timer.startOneShot(0);
97}
98
99void ScriptRunner::timerFired(Timer<ScriptRunner>& timer)
100{
101    ASSERT_UNUSED(timer, &timer == &m_timer);
102
103    Ref<Document> protect(m_document);
104
105    Vector<PendingScript> scripts;
106    scripts.swap(m_scriptsToExecuteSoon);
107
108    size_t numInOrderScriptsToExecute = 0;
109    for (; numInOrderScriptsToExecute < m_scriptsToExecuteInOrder.size() && m_scriptsToExecuteInOrder[numInOrderScriptsToExecute].cachedScript()->isLoaded(); ++numInOrderScriptsToExecute)
110        scripts.append(m_scriptsToExecuteInOrder[numInOrderScriptsToExecute]);
111    if (numInOrderScriptsToExecute)
112        m_scriptsToExecuteInOrder.remove(0, numInOrderScriptsToExecute);
113
114    size_t size = scripts.size();
115    for (size_t i = 0; i < size; ++i) {
116        CachedScript* cachedScript = scripts[i].cachedScript();
117        RefPtr<Element> element = scripts[i].releaseElementAndClear();
118        toScriptElementIfPossible(element.get())->execute(cachedScript);
119        m_document.decrementLoadEventDelayCount();
120    }
121}
122
123}
124