third_party/WebKit/Source/core/html/HTMLMapElement.cpp

   1 /*
   2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
   4  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  */
  21
  22 #include "config.h"
  23 #include "core/html/HTMLMapElement.h"
  24
  25 #include "core/HTMLNames.h"
  26 #include "core/dom/Document.h"
  27 #include "core/dom/ElementTraversal.h"
  28 #include "core/dom/NodeListsNodeData.h"
  29 #include "core/frame/UseCounter.h"
  30 #include "core/html/HTMLAreaElement.h"
  31 #include "core/html/HTMLCollection.h"
  32 #include "core/html/HTMLImageElement.h"
  33 #include "core/layout/HitTestResult.h"
  34
  35 namespace blink {
  36
  37 using namespace HTMLNames;
  38
  39 inline HTMLMapElement::HTMLMapElement(Document& document)
  40     : HTMLElement(mapTag, document)
  41 {
  42     UseCounter::count(document, UseCounter::MapElement);
  43 }
  44
  45 DEFINE_NODE_FACTORY(HTMLMapElement)
  46
  47 HTMLMapElement::~HTMLMapElement()
  48 {
  49 }
  50
  51 HTMLAreaElement* HTMLMapElement::areaForPoint(LayoutPoint location, const LayoutSize& containerSize)
  52 {
  53     HTMLAreaElement* defaultArea = nullptr;
  54     for (HTMLAreaElement& area : Traversal<HTMLAreaElement>::descendantsOf(*this)) {
  55         if (area.isDefault() && !defaultArea)
  56             defaultArea = &area;
  57         else if (area.pointInArea(location, containerSize))
  58             return &area;
  59     }
  60
  61     return defaultArea;
  62 }
  63
  64 HTMLImageElement* HTMLMapElement::imageElement()
  65 {
  66     RefPtrWillBeRawPtr<HTMLCollection> images = document().images();
  67     for (unsigned i = 0; Element* curr = images->item(i); ++i) {
  68         ASSERT(isHTMLImageElement(curr));
  69
  70         // The HTMLImageElement's useMap() value includes the '#' symbol at the beginning,
  71         // which has to be stripped off.
  72         HTMLImageElement& imageElement = toHTMLImageElement(*curr);
  73         String useMapName = imageElement.getAttribute(usemapAttr).string().substring(1);
  74         if (equalIgnoringCase(useMapName, m_name))
  75             return &imageElement;
  76     }
  77
  78     return nullptr;
  79 }
  80
  81 void HTMLMapElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
  82 {
  83     // FIXME: This logic seems wrong for XML documents.
  84     // Either the id or name will be used depending on the order the attributes are parsed.
  85
  86     if (name == idAttr || name == nameAttr) {
  87         if (name == idAttr) {
  88             // Call base class so that hasID bit gets set.
  89             HTMLElement::parseAttribute(name, value);
  90             if (document().isHTMLDocument())
  91                 return;
  92         }
  93         if (inDocument())
  94             treeScope().removeImageMap(this);
  95         String mapName = value;
  96         if (mapName[0] == '#')
  97             mapName = mapName.substring(1);
  98         m_name = AtomicString(document().isHTMLDocument() ? mapName.lower() : mapName);
  99         if (inDocument())
 100             treeScope().addImageMap(this);
 101
 102         return;
 103     }
 104
 105     HTMLElement::parseAttribute(name, value);
 106 }
 107
 108 PassRefPtrWillBeRawPtr<HTMLCollection> HTMLMapElement::areas()
 109 {
 110     return ensureCachedCollection<HTMLCollection>(MapAreas);
 111 }
 112
 113 Node::InsertionNotificationRequest HTMLMapElement::insertedInto(ContainerNode* insertionPoint)
 114 {
 115     if (insertionPoint->inDocument())
 116         treeScope().addImageMap(this);
 117     return HTMLElement::insertedInto(insertionPoint);
 118 }
 119
 120 void HTMLMapElement::removedFrom(ContainerNode* insertionPoint)
 121 {
 122     if (insertionPoint->inDocument())
 123         treeScope().removeImageMap(this);
 124     HTMLElement::removedFrom(insertionPoint);
 125 }
 126
 127 }