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
|
/*
* 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_NODE_CHILD_REMOVAL_TRACKER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_NODE_CHILD_REMOVAL_TRACKER_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class NodeChildRemovalTracker {
STACK_ALLOCATED();
public:
explicit NodeChildRemovalTracker(const Node&);
~NodeChildRemovalTracker();
static bool IsBeingRemoved(const Node&);
private:
const Node& GetNode() const { return *node_; }
NodeChildRemovalTracker* Previous() { return previous_; }
Member<const Node> node_;
// Using raw pointers are safe because these NodeChildRemovalTrackers are
// guaranteed to be on a stack.
NodeChildRemovalTracker* previous_;
CORE_EXPORT static NodeChildRemovalTracker* last_;
};
inline NodeChildRemovalTracker::NodeChildRemovalTracker(const Node& node)
: node_(node), previous_(last_) {
last_ = this;
}
inline NodeChildRemovalTracker::~NodeChildRemovalTracker() {
last_ = previous_;
}
inline bool NodeChildRemovalTracker::IsBeingRemoved(const Node& node) {
for (NodeChildRemovalTracker* removal = last_; removal;
removal = removal->Previous()) {
if (removal->GetNode().IsShadowIncludingInclusiveAncestorOf(node))
return true;
}
return false;
}
} // namespace blink
#endif
|