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 WebCore {
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
49void UserActionElementSet::documentDidRemoveLastRef()
50{
51    m_elements.clear();
52}
53
54bool UserActionElementSet::hasFlags(const Node* node, unsigned flags) const
55{
56    ASSERT(node->isUserActionElement() && node->isElementNode());
57    return hasFlags(toElement(node), flags);
58}
59
60void UserActionElementSet::setFlags(Node* node, unsigned flags)
61{
62    if (!node->isElementNode())
63        return;
64    return setFlags(toElement(node), flags);
65}
66
67void UserActionElementSet::clearFlags(Node* node, unsigned flags)
68{
69    if (!node->isElementNode())
70        return;
71    return clearFlags(toElement(node), flags);
72}
73
74inline bool UserActionElementSet::hasFlags(const Element* element, unsigned flags) const
75{
76    ASSERT(element->isUserActionElement());
77    ElementFlagMap::const_iterator found = m_elements.find(const_cast<Element*>(element));
78    if (found == m_elements.end())
79        return false;
80    return found->value & flags;
81}
82
83inline void UserActionElementSet::clearFlags(Element* element, unsigned flags)
84{
85    if (!element->isUserActionElement()) {
86        ASSERT(m_elements.end() == m_elements.find(element));
87        return;
88    }
89
90    ElementFlagMap::iterator found = m_elements.find(element);
91    if (found == m_elements.end()) {
92        element->setUserActionElement(false);
93        return;
94    }
95
96    unsigned updated = found->value & ~flags;
97    if (!updated) {
98        element->setUserActionElement(false);
99        m_elements.remove(found);
100        return;
101    }
102
103    found->value = updated;
104}
105
106inline void UserActionElementSet::setFlags(Element* element, unsigned flags)
107{
108    ElementFlagMap::iterator result = m_elements.find(element);
109    if (result != m_elements.end()) {
110        ASSERT(element->isUserActionElement());
111        result->value |= flags;
112        return;
113    }
114
115    element->setUserActionElement(true);
116    m_elements.add(element, flags);
117}
118
119}
120