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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 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 "HTMLMapElement.h"
     24 
     25 #include "Document.h"
     26 #include "HTMLAreaElement.h"
     27 #include "HTMLCollection.h"
     28 #include "HTMLImageElement.h"
     29 #include "HTMLNames.h"
     30 #include "HitTestResult.h"
     31 #include "IntSize.h"
     32 #include "MappedAttribute.h"
     33 #include "RenderObject.h"
     34 
     35 using namespace std;
     36 
     37 namespace WebCore {
     38 
     39 using namespace HTMLNames;
     40 
     41 HTMLMapElement::HTMLMapElement(const QualifiedName& tagName, Document* doc)
     42     : HTMLElement(tagName, doc)
     43 {
     44     ASSERT(hasTagName(mapTag));
     45 }
     46 
     47 HTMLMapElement::~HTMLMapElement()
     48 {
     49     document()->removeImageMap(this);
     50 }
     51 
     52 bool HTMLMapElement::checkDTD(const Node* newChild)
     53 {
     54     return inEitherTagList(newChild) || newChild->hasTagName(areaTag) // HTML 4 DTD
     55         || newChild->hasTagName(scriptTag); // extensions
     56 }
     57 
     58 bool HTMLMapElement::mapMouseEvent(int x, int y, const IntSize& size, HitTestResult& result)
     59 {
     60     HTMLAreaElement* defaultArea = 0;
     61     Node *node = this;
     62     while ((node = node->traverseNextNode(this))) {
     63         if (node->hasTagName(areaTag)) {
     64             HTMLAreaElement* areaElt = static_cast<HTMLAreaElement*>(node);
     65             if (areaElt->isDefault()) {
     66                 if (!defaultArea)
     67                     defaultArea = areaElt;
     68             } else if (areaElt->mapMouseEvent(x, y, size, result))
     69                 return true;
     70         }
     71     }
     72 
     73     if (defaultArea) {
     74         result.setInnerNode(defaultArea);
     75         result.setURLElement(defaultArea);
     76     }
     77     return defaultArea;
     78 }
     79 
     80 HTMLImageElement* HTMLMapElement::imageElement() const
     81 {
     82     RefPtr<HTMLCollection> coll = renderer()->document()->images();
     83     for (Node* curr = coll->firstItem(); curr; curr = coll->nextItem()) {
     84         if (!curr->hasTagName(imgTag))
     85             continue;
     86 
     87         // The HTMLImageElement's useMap() value includes the '#' symbol at the beginning,
     88         // which has to be stripped off.
     89         HTMLImageElement* imageElement = static_cast<HTMLImageElement*>(curr);
     90         String useMapName = imageElement->getAttribute(usemapAttr).string().substring(1);
     91         if (equalIgnoringCase(useMapName, m_name))
     92             return imageElement;
     93     }
     94 
     95     return 0;
     96 }
     97 
     98 void HTMLMapElement::parseMappedAttribute(MappedAttribute* attr)
     99 {
    100     const QualifiedName& attrName = attr->name();
    101     if (attrName == idAttributeName() || attrName == nameAttr) {
    102         Document* doc = document();
    103         if (attrName == idAttributeName()) {
    104             // Call base class so that hasID bit gets set.
    105             HTMLElement::parseMappedAttribute(attr);
    106             if (doc->isHTMLDocument())
    107                 return;
    108         }
    109         doc->removeImageMap(this);
    110         String mapName = attr->value();
    111         if (mapName[0] == '#')
    112             mapName = mapName.substring(1);
    113         m_name = doc->isHTMLDocument() ? mapName.lower() : mapName;
    114         doc->addImageMap(this);
    115     } else
    116         HTMLElement::parseMappedAttribute(attr);
    117 }
    118 
    119 PassRefPtr<HTMLCollection> HTMLMapElement::areas()
    120 {
    121     return HTMLCollection::create(this, MapAreas);
    122 }
    123 
    124 String HTMLMapElement::name() const
    125 {
    126     return getAttribute(nameAttr);
    127 }
    128 
    129 void HTMLMapElement::setName(const String& value)
    130 {
    131     setAttribute(nameAttr, value);
    132 }
    133 
    134 }
    135