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
35 namespace WebCore {
36
ScriptRunner(Document * document)37 ScriptRunner::ScriptRunner(Document* document)
38 : m_document(document)
39 , m_timer(this, &ScriptRunner::timerFired)
40 {
41 ASSERT(document);
42 }
43
~ScriptRunner()44 ScriptRunner::~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
queueScriptForExecution(ScriptElement * scriptElement,CachedResourceHandle<CachedScript> cachedScript,ExecutionType executionType)52 void 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
suspend()78 void ScriptRunner::suspend()
79 {
80 m_timer.stop();
81 }
82
resume()83 void ScriptRunner::resume()
84 {
85 if (hasPendingScripts())
86 m_timer.startOneShot(0);
87 }
88
notifyInOrderScriptReady()89 void ScriptRunner::notifyInOrderScriptReady()
90 {
91 ASSERT(!m_scriptsToExecuteInOrder.isEmpty());
92 m_timer.startOneShot(0);
93 }
94
timerFired(Timer<ScriptRunner> * timer)95 void 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