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 "config.h"
32 #include "core/dom/PostAttachCallbacks.h"
33
34 #include "core/dom/Node.h"
35 #include "wtf/RefPtr.h"
36
37 namespace WebCore {
38
39 typedef std::pair<PostAttachCallbacks::Callback, RefPtr<Node> > CallbackInfo;
40 typedef Vector<CallbackInfo> CallbackQueue;
41
42 static size_t s_attachDepth;
43
callbackQueue()44 static CallbackQueue& callbackQueue()
45 {
46 DEFINE_STATIC_LOCAL(CallbackQueue, callbackQueue, ());
47 return callbackQueue;
48 }
49
queueCallback(Callback callback,Node * node)50 void PostAttachCallbacks::queueCallback(Callback callback, Node* node)
51 {
52 callbackQueue().append(CallbackInfo(callback, node));
53 }
54
SuspendScope()55 PostAttachCallbacks::SuspendScope::SuspendScope()
56 {
57 ++s_attachDepth;
58 }
59
~SuspendScope()60 PostAttachCallbacks::SuspendScope::~SuspendScope()
61 {
62 if (s_attachDepth == 1) {
63 // We recalculate size() each time through the loop because a callback
64 // can add more callbacks to the end of the queue.
65 CallbackQueue& queue = callbackQueue();
66 for (size_t i = 0; i < queue.size(); ++i) {
67 const CallbackInfo& info = queue[i];
68 info.first(info.second.get());
69 }
70 queue.clear();
71 }
72 --s_attachDepth;
73 }
74
75 } // namespace WebCore
76