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      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 
     33 namespace WebCore {
     34 
     35 UserActionElementSet::UserActionElementSet()
     36 {
     37 }
     38 
     39 UserActionElementSet::~UserActionElementSet()
     40 {
     41 }
     42 
     43 void UserActionElementSet::didDetach(Node* node)
     44 {
     45     ASSERT(node->isUserActionElement());
     46     clearFlags(toElement(node), IsActiveFlag | InActiveChainFlag | IsHoveredFlag);
     47 }
     48 
     49 #if !ENABLE(OILPAN)
     50 void UserActionElementSet::documentDidRemoveLastRef()
     51 {
     52     m_elements.clear();
     53 }
     54 #endif
     55 
     56 bool UserActionElementSet::hasFlags(const Node* node, unsigned flags) const
     57 {
     58     ASSERT(node->isUserActionElement() && node->isElementNode());
     59     return hasFlags(toElement(node), flags);
     60 }
     61 
     62 void UserActionElementSet::setFlags(Node* node, unsigned flags)
     63 {
     64     if (!node->isElementNode())
     65         return;
     66     return setFlags(toElement(node), flags);
     67 }
     68 
     69 void UserActionElementSet::clearFlags(Node* node, unsigned flags)
     70 {
     71     if (!node->isElementNode())
     72         return;
     73     return clearFlags(toElement(node), flags);
     74 }
     75 
     76 inline 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 
     85 inline 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 
    108 inline 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 
    121 void UserActionElementSet::trace(Visitor* visitor)
    122 {
    123     visitor->trace(m_elements);
    124 }
    125 
    126 }
    127