1/*
2 * Copyright (C) 2012 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Neither the name of Google Inc. nor the names of its
11 * contributors may be used to endorse or promote products derived from
12 * this software without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "core/dom/UserActionElementSet.h"
29
30#include "core/dom/Element.h"
31#include "core/dom/Node.h"
32
33namespace blink {
34
35UserActionElementSet::UserActionElementSet()
36{
37}
38
39UserActionElementSet::~UserActionElementSet()
40{
41}
42
43void UserActionElementSet::didDetach(Node* node)
44{
45    ASSERT(node->isUserActionElement());
46    clearFlags(toElement(node), IsActiveFlag | InActiveChainFlag | IsHoveredFlag);
47}
48
49#if !ENABLE(OILPAN)
50void UserActionElementSet::documentDidRemoveLastRef()
51{
52    m_elements.clear();
53}
54#endif
55
56bool UserActionElementSet::hasFlags(const Node* node, unsigned flags) const
57{
58    ASSERT(node->isUserActionElement() && node->isElementNode());
59    return hasFlags(toElement(node), flags);
60}
61
62void UserActionElementSet::setFlags(Node* node, unsigned flags)
63{
64    if (!node->isElementNode())
65        return;
66    return setFlags(toElement(node), flags);
67}
68
69void UserActionElementSet::clearFlags(Node* node, unsigned flags)
70{
71    if (!node->isElementNode())
72        return;
73    return clearFlags(toElement(node), flags);
74}
75
76inline bool UserActionElementSet::hasFlags(const Element* element, unsigned flags) const
77{
78    ASSERT(element->isUserActionElement());
79    ElementFlagMap::const_iterator found = m_elements.find(const_cast<Element*>(element));
80    if (found == m_elements.end())
81        return false;
82    return found->value & flags;
83}
84
85inline void UserActionElementSet::clearFlags(Element* element, unsigned flags)
86{
87    if (!element->isUserActionElement()) {
88        ASSERT(m_elements.end() == m_elements.find(element));
89        return;
90    }
91
92    ElementFlagMap::iterator found = m_elements.find(element);
93    if (found == m_elements.end()) {
94        element->setUserActionElement(false);
95        return;
96    }
97
98    unsigned updated = found->value & ~flags;
99    if (!updated) {
100        element->setUserActionElement(false);
101        m_elements.remove(found);
102        return;
103    }
104
105    found->value = updated;
106}
107
108inline void UserActionElementSet::setFlags(Element* element, unsigned flags)
109{
110    ElementFlagMap::iterator result = m_elements.find(element);
111    if (result != m_elements.end()) {
112        ASSERT(element->isUserActionElement());
113        result->value |= flags;
114        return;
115    }
116
117    element->setUserActionElement(true);
118    m_elements.add(element, flags);
119}
120
121void UserActionElementSet::trace(Visitor* visitor)
122{
123#if ENABLE(OILPAN)
124    visitor->trace(m_elements);
125#endif
126}
127
128}
129