1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Google Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/dom/custom/CustomElementCallbackDispatcher.h"
#include "core/dom/custom/CustomElementCallbackQueue.h"
#include "core/dom/custom/CustomElementCallbackScheduler.h"
#include "wtf/MainThread.h"
namespace WebCore {
size_t CustomElementCallbackDispatcher::s_elementQueueStart = 0;
// The base of the stack has a null sentinel value.
size_t CustomElementCallbackDispatcher::s_elementQueueEnd = kNumSentinels;
CustomElementCallbackDispatcher& CustomElementCallbackDispatcher::instance()
{
DEFINE_STATIC_LOCAL(CustomElementCallbackDispatcher, instance, ());
return instance;
}
bool CustomElementCallbackDispatcher::dispatch()
{
ASSERT(isMainThread());
if (inCallbackDeliveryScope())
return false;
bool didWork = m_baseElementQueue.dispatch(baseElementQueue());
CustomElementCallbackScheduler::clearElementCallbackQueueMap();
return didWork;
}
// Dispatches callbacks when popping the processing stack.
void CustomElementCallbackDispatcher::processElementQueueAndPop()
{
instance().processElementQueueAndPop(s_elementQueueStart, s_elementQueueEnd);
}
void CustomElementCallbackDispatcher::processElementQueueAndPop(size_t start, size_t end)
{
ASSERT(isMainThread());
ElementQueue thisQueue = currentElementQueue();
for (size_t i = start; i < end; i++) {
{
// The created callback may schedule entered document
// callbacks.
CallbackDeliveryScope deliveryScope;
m_flattenedProcessingStack[i]->processInElementQueue(thisQueue);
}
ASSERT(start == s_elementQueueStart);
ASSERT(end == s_elementQueueEnd);
}
// Pop the element queue from the processing stack
m_flattenedProcessingStack.resize(start);
s_elementQueueEnd = start;
if (start == kNumSentinels && m_baseElementQueue.isEmpty())
CustomElementCallbackScheduler::clearElementCallbackQueueMap();
}
void CustomElementCallbackDispatcher::enqueue(CustomElementCallbackQueue* callbackQueue)
{
if (callbackQueue->owner() == currentElementQueue())
return;
callbackQueue->setOwner(currentElementQueue());
if (inCallbackDeliveryScope()) {
m_flattenedProcessingStack.append(callbackQueue);
++s_elementQueueEnd;
} else {
m_baseElementQueue.enqueue(callbackQueue);
}
}
} // namespace WebCore
|
