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1 /* | |
2 * Copyright (C) 2013 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 * | |
8 * 1. Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright | |
11 * notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * 3. Neither the name of Google Inc. nor the names of its contributors | |
15 * may be used to endorse or promote products derived from this | |
16 * software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #include "core/dom/custom/CustomElementProcessingStack.h" | |
32 | |
33 #include "core/dom/custom/CustomElementCallbackQueue.h" | |
34 #include "core/dom/custom/CustomElementScheduler.h" | |
35 | |
36 namespace blink { | |
37 | |
38 size_t CustomElementProcessingStack::s_elementQueueStart = 0; | |
39 | |
40 // The base of the stack has a null sentinel value. | |
41 size_t CustomElementProcessingStack::s_elementQueueEnd = kNumSentinels; | |
42 | |
43 CustomElementProcessingStack& CustomElementProcessingStack::instance() | |
44 { | |
45 DEFINE_STATIC_LOCAL(CustomElementProcessingStack, instance, (new CustomEleme
ntProcessingStack)); | |
46 return instance; | |
47 } | |
48 | |
49 // Dispatches callbacks when popping the processing stack. | |
50 void CustomElementProcessingStack::processElementQueueAndPop() | |
51 { | |
52 instance().processElementQueueAndPop(s_elementQueueStart, s_elementQueueEnd)
; | |
53 } | |
54 | |
55 void CustomElementProcessingStack::processElementQueueAndPop(size_t start, size_
t end) | |
56 { | |
57 DCHECK(isMainThread()); | |
58 CustomElementCallbackQueue::ElementQueueId thisQueue = currentElementQueue()
; | |
59 | |
60 for (size_t i = start; i < end; ++i) { | |
61 { | |
62 // The created callback may schedule entered document | |
63 // callbacks. | |
64 CallbackDeliveryScope deliveryScope; | |
65 m_flattenedProcessingStack[i]->processInElementQueue(thisQueue); | |
66 } | |
67 | |
68 DCHECK_EQ(start, s_elementQueueStart); | |
69 DCHECK_EQ(end, s_elementQueueEnd); | |
70 } | |
71 | |
72 // Pop the element queue from the processing stack | |
73 m_flattenedProcessingStack.resize(start); | |
74 s_elementQueueEnd = start; | |
75 | |
76 if (s_elementQueueStart == kNumSentinels) | |
77 CustomElementScheduler::callbackDispatcherDidFinish(); | |
78 } | |
79 | |
80 void CustomElementProcessingStack::enqueue(CustomElementCallbackQueue* callbackQ
ueue) | |
81 { | |
82 DCHECK(inCallbackDeliveryScope()); | |
83 | |
84 if (callbackQueue->owner() == currentElementQueue()) | |
85 return; | |
86 | |
87 callbackQueue->setOwner(currentElementQueue()); | |
88 | |
89 m_flattenedProcessingStack.append(callbackQueue); | |
90 ++s_elementQueueEnd; | |
91 } | |
92 | |
93 DEFINE_TRACE(CustomElementProcessingStack) | |
94 { | |
95 visitor->trace(m_flattenedProcessingStack); | |
96 } | |
97 | |
98 } // namespace blink | |
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