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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 void UserActionElementSet::documentDidRemoveLastRef()
     50 {
     51     m_elements.clear();
     52 }
     53 
     54 bool UserActionElementSet::hasFlags(const Node* node, unsigned flags) const
     55 {
     56     ASSERT(node->isUserActionElement() && node->isElementNode());
     57     return hasFlags(toElement(node), flags);
     58 }
     59 
     60 void UserActionElementSet::setFlags(Node* node, unsigned flags)
     61 {
     62     if (!node->isElementNode())
     63         return;
     64     return setFlags(toElement(node), flags);
     65 }
     66 
     67 void UserActionElementSet::clearFlags(Node* node, unsigned flags)
     68 {
     69     if (!node->isElementNode())
     70         return;
     71     return clearFlags(toElement(node), flags);
     72 }
     73 
     74 inline 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 
     83 inline 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 
    106 inline 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