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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) 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/rendering/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 bool HTMLMapElement::mapMouseEvent(LayoutPoint location, const LayoutSize& size, HitTestResult& result)
     52 {
     53     HTMLAreaElement* defaultArea = 0;
     54     for (HTMLAreaElement* area = Traversal<HTMLAreaElement>::firstWithin(*this); area; area = Traversal<HTMLAreaElement>::next(*area, this)) {
     55         if (area->isDefault()) {
     56             if (!defaultArea)
     57                 defaultArea = area;
     58         } else if (area->mapMouseEvent(location, size, result)) {
     59             return true;
     60         }
     61     }
     62 
     63     if (defaultArea) {
     64         result.setInnerNode(defaultArea);
     65         result.setURLElement(defaultArea);
     66     }
     67     return defaultArea;
     68 }
     69 
     70 HTMLImageElement* HTMLMapElement::imageElement()
     71 {
     72     RefPtrWillBeRawPtr<HTMLCollection> images = document().images();
     73     for (unsigned i = 0; Element* curr = images->item(i); ++i) {
     74         ASSERT(isHTMLImageElement(curr));
     75 
     76         // The HTMLImageElement's useMap() value includes the '#' symbol at the beginning,
     77         // which has to be stripped off.
     78         HTMLImageElement& imageElement = toHTMLImageElement(*curr);
     79         String useMapName = imageElement.getAttribute(usemapAttr).string().substring(1);
     80         if (equalIgnoringCase(useMapName, m_name))
     81             return &imageElement;
     82     }
     83 
     84     return 0;
     85 }
     86 
     87 void HTMLMapElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     88 {
     89     // FIXME: This logic seems wrong for XML documents.
     90     // Either the id or name will be used depending on the order the attributes are parsed.
     91 
     92     if (isIdAttributeName(name) || name == nameAttr) {
     93         if (isIdAttributeName(name)) {
     94             // Call base class so that hasID bit gets set.
     95             HTMLElement::parseAttribute(name, value);
     96             if (document().isHTMLDocument())
     97                 return;
     98         }
     99         if (inDocument())
    100             treeScope().removeImageMap(this);
    101         String mapName = value;
    102         if (mapName[0] == '#')
    103             mapName = mapName.substring(1);
    104         m_name = AtomicString(document().isHTMLDocument() ? mapName.lower() : mapName);
    105         if (inDocument())
    106             treeScope().addImageMap(this);
    107 
    108         return;
    109     }
    110 
    111     HTMLElement::parseAttribute(name, value);
    112 }
    113 
    114 PassRefPtrWillBeRawPtr<HTMLCollection> HTMLMapElement::areas()
    115 {
    116     return ensureCachedCollection<HTMLCollection>(MapAreas);
    117 }
    118 
    119 Node::InsertionNotificationRequest HTMLMapElement::insertedInto(ContainerNode* insertionPoint)
    120 {
    121     if (insertionPoint->inDocument())
    122         treeScope().addImageMap(this);
    123     return HTMLElement::insertedInto(insertionPoint);
    124 }
    125 
    126 void HTMLMapElement::removedFrom(ContainerNode* insertionPoint)
    127 {
    128     if (insertionPoint->inDocument())
    129         treeScope().removeImageMap(this);
    130     HTMLElement::removedFrom(insertionPoint);
    131 }
    132 
    133 }
    134