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/rendering/HitTestResult.h"
34
35namespace blink {
36
37using namespace HTMLNames;
38
39inline HTMLMapElement::HTMLMapElement(Document& document)
40    : HTMLElement(mapTag, document)
41{
42    UseCounter::count(document, UseCounter::MapElement);
43}
44
45DEFINE_NODE_FACTORY(HTMLMapElement)
46
47HTMLMapElement::~HTMLMapElement()
48{
49}
50
51bool 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
70HTMLImageElement* 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
87void 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
114PassRefPtrWillBeRawPtr<HTMLCollection> HTMLMapElement::areas()
115{
116    return ensureCachedCollection<HTMLCollection>(MapAreas);
117}
118
119Node::InsertionNotificationRequest HTMLMapElement::insertedInto(ContainerNode* insertionPoint)
120{
121    if (insertionPoint->inDocument())
122        treeScope().addImageMap(this);
123    return HTMLElement::insertedInto(insertionPoint);
124}
125
126void HTMLMapElement::removedFrom(ContainerNode* insertionPoint)
127{
128    if (insertionPoint->inDocument())
129        treeScope().removeImageMap(this);
130    HTMLElement::removedFrom(insertionPoint);
131}
132
133}
134