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/ScriptRunner.h"
28
29 #include "core/dom/Document.h"
30 #include "core/dom/Element.h"
31 #include "core/dom/PendingScript.h"
32 #include "core/dom/ScriptLoader.h"
33 #include "core/fetch/ScriptResource.h"
34 #include "platform/heap/Handle.h"
35
36 namespace blink {
37
ScriptRunner(Document * document)38 ScriptRunner::ScriptRunner(Document* document)
39 : m_document(document)
40 , m_timer(this, &ScriptRunner::timerFired)
41 {
42 ASSERT(document);
43 }
44
~ScriptRunner()45 ScriptRunner::~ScriptRunner()
46 {
47 }
48
addPendingAsyncScript(ScriptLoader * scriptLoader,const PendingScript & pendingScript)49 void ScriptRunner::addPendingAsyncScript(ScriptLoader* scriptLoader, const PendingScript& pendingScript)
50 {
51 m_document->incrementLoadEventDelayCount();
52 m_pendingAsyncScripts.add(scriptLoader, pendingScript);
53 }
54
queueScriptForExecution(ScriptLoader * scriptLoader,ResourcePtr<ScriptResource> resource,ExecutionType executionType)55 void ScriptRunner::queueScriptForExecution(ScriptLoader* scriptLoader, ResourcePtr<ScriptResource> resource, ExecutionType executionType)
56 {
57 ASSERT(scriptLoader);
58 ASSERT(resource.get());
59
60 Element* element = scriptLoader->element();
61 ASSERT(element);
62 ASSERT(element->inDocument());
63
64 switch (executionType) {
65 case ASYNC_EXECUTION:
66 addPendingAsyncScript(scriptLoader, PendingScript(element, resource.get()));
67 break;
68
69 case IN_ORDER_EXECUTION:
70 m_document->incrementLoadEventDelayCount();
71 m_scriptsToExecuteInOrder.append(PendingScript(element, resource.get()));
72 break;
73 }
74 }
75
suspend()76 void ScriptRunner::suspend()
77 {
78 m_timer.stop();
79 }
80
resume()81 void ScriptRunner::resume()
82 {
83 if (hasPendingScripts())
84 m_timer.startOneShot(0, FROM_HERE);
85 }
86
notifyScriptReady(ScriptLoader * scriptLoader,ExecutionType executionType)87 void ScriptRunner::notifyScriptReady(ScriptLoader* scriptLoader, ExecutionType executionType)
88 {
89 switch (executionType) {
90 case ASYNC_EXECUTION:
91 ASSERT(m_pendingAsyncScripts.contains(scriptLoader));
92 m_scriptsToExecuteSoon.append(m_pendingAsyncScripts.take(scriptLoader));
93 break;
94
95 case IN_ORDER_EXECUTION:
96 ASSERT(!m_scriptsToExecuteInOrder.isEmpty());
97 break;
98 }
99 m_timer.startOneShot(0, FROM_HERE);
100 }
101
notifyScriptLoadError(ScriptLoader * scriptLoader,ExecutionType executionType)102 void ScriptRunner::notifyScriptLoadError(ScriptLoader* scriptLoader, ExecutionType executionType)
103 {
104 switch (executionType) {
105 case ASYNC_EXECUTION:
106 ASSERT(m_pendingAsyncScripts.contains(scriptLoader));
107 m_pendingAsyncScripts.remove(scriptLoader);
108 m_document->decrementLoadEventDelayCount();
109 break;
110
111 case IN_ORDER_EXECUTION:
112 ASSERT(!m_scriptsToExecuteInOrder.isEmpty());
113 break;
114 }
115 }
116
movePendingAsyncScript(ScriptRunner * newRunner,ScriptLoader * scriptLoader)117 void ScriptRunner::movePendingAsyncScript(ScriptRunner* newRunner, ScriptLoader* scriptLoader)
118 {
119 if (m_pendingAsyncScripts.contains(scriptLoader)) {
120 newRunner->addPendingAsyncScript(scriptLoader, m_pendingAsyncScripts.take(scriptLoader));
121 m_document->decrementLoadEventDelayCount();
122 }
123 }
124
timerFired(Timer<ScriptRunner> * timer)125 void ScriptRunner::timerFired(Timer<ScriptRunner>* timer)
126 {
127 ASSERT_UNUSED(timer, timer == &m_timer);
128
129 RefPtrWillBeRawPtr<Document> protect(m_document.get());
130
131 Vector<PendingScript> scripts;
132 scripts.swap(m_scriptsToExecuteSoon);
133
134 size_t numInOrderScriptsToExecute = 0;
135 for (; numInOrderScriptsToExecute < m_scriptsToExecuteInOrder.size() && m_scriptsToExecuteInOrder[numInOrderScriptsToExecute].resource()->isLoaded(); ++numInOrderScriptsToExecute)
136 scripts.append(m_scriptsToExecuteInOrder[numInOrderScriptsToExecute]);
137 if (numInOrderScriptsToExecute)
138 m_scriptsToExecuteInOrder.remove(0, numInOrderScriptsToExecute);
139
140 size_t size = scripts.size();
141 for (size_t i = 0; i < size; ++i) {
142 ScriptResource* resource = scripts[i].resource();
143 RefPtrWillBeRawPtr<Element> element = scripts[i].releaseElementAndClear();
144 toScriptLoaderIfPossible(element.get())->execute(resource);
145 m_document->decrementLoadEventDelayCount();
146 }
147 }
148
trace(Visitor * visitor)149 void ScriptRunner::trace(Visitor* visitor)
150 {
151 #if ENABLE(OILPAN)
152 visitor->trace(m_document);
153 visitor->trace(m_scriptsToExecuteInOrder);
154 visitor->trace(m_scriptsToExecuteSoon);
155 visitor->trace(m_pendingAsyncScripts);
156 #endif
157 }
158
159 }
160