1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2009, 2011 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "HTMLAreaElement.h"
#include "AffineTransform.h"
#include "Attribute.h"
#include "Frame.h"
#include "HTMLImageElement.h"
#include "HTMLMapElement.h"
#include "HTMLNames.h"
#include "HitTestResult.h"
#include "Path.h"
#include "RenderImage.h"
using namespace std;
namespace WebCore {
using namespace HTMLNames;
inline HTMLAreaElement::HTMLAreaElement(const QualifiedName& tagName, Document* document)
: HTMLAnchorElement(tagName, document)
, m_coordsLen(0)
, m_lastSize(-1, -1)
, m_shape(Unknown)
{
ASSERT(hasTagName(areaTag));
setIeForbidsInsertHTML();
}
PassRefPtr<HTMLAreaElement> HTMLAreaElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new HTMLAreaElement(tagName, document));
}
void HTMLAreaElement::parseMappedAttribute(Attribute* attr)
{
if (attr->name() == shapeAttr) {
if (equalIgnoringCase(attr->value(), "default"))
m_shape = Default;
else if (equalIgnoringCase(attr->value(), "circle"))
m_shape = Circle;
else if (equalIgnoringCase(attr->value(), "poly"))
m_shape = Poly;
else if (equalIgnoringCase(attr->value(), "rect"))
m_shape = Rect;
} else if (attr->name() == coordsAttr) {
m_coords = newCoordsArray(attr->value().string(), m_coordsLen);
} else if (attr->name() == altAttr || attr->name() == accesskeyAttr) {
// Do nothing.
} else
HTMLAnchorElement::parseMappedAttribute(attr);
}
bool HTMLAreaElement::mapMouseEvent(int x, int y, const IntSize& size, HitTestResult& result)
{
if (m_lastSize != size) {
m_region = adoptPtr(new Path(getRegion(size)));
m_lastSize = size;
}
if (!m_region->contains(IntPoint(x, y)))
return false;
result.setInnerNode(this);
result.setURLElement(this);
return true;
}
Path HTMLAreaElement::computePath(RenderObject* obj) const
{
if (!obj)
return Path();
// FIXME: This doesn't work correctly with transforms.
FloatPoint absPos = obj->localToAbsolute();
// Default should default to the size of the containing object.
IntSize size = m_lastSize;
if (m_shape == Default)
size = obj->absoluteOutlineBounds().size();
Path p = getRegion(size);
float zoomFactor = document()->frame()->pageZoomFactor();
if (zoomFactor != 1.0f) {
AffineTransform zoomTransform;
zoomTransform.scale(zoomFactor);
p.transform(zoomTransform);
}
p.translate(absPos - FloatPoint());
return p;
}
IntRect HTMLAreaElement::computeRect(RenderObject* obj) const
{
return enclosingIntRect(computePath(obj).boundingRect());
}
Path HTMLAreaElement::getRegion(const IntSize& size) const
{
if (!m_coords && m_shape != Default)
return Path();
int width = size.width();
int height = size.height();
// If element omits the shape attribute, select shape based on number of coordinates.
Shape shape = m_shape;
if (shape == Unknown) {
if (m_coordsLen == 3)
shape = Circle;
else if (m_coordsLen == 4)
shape = Rect;
else if (m_coordsLen >= 6)
shape = Poly;
}
Path path;
switch (shape) {
case Poly:
if (m_coordsLen >= 6) {
int numPoints = m_coordsLen / 2;
path.moveTo(FloatPoint(m_coords[0].calcMinValue(width), m_coords[1].calcMinValue(height)));
for (int i = 1; i < numPoints; ++i)
path.addLineTo(FloatPoint(m_coords[i * 2].calcMinValue(width), m_coords[i * 2 + 1].calcMinValue(height)));
path.closeSubpath();
}
break;
case Circle:
if (m_coordsLen >= 3) {
Length radius = m_coords[2];
int r = min(radius.calcMinValue(width), radius.calcMinValue(height));
path.addEllipse(FloatRect(m_coords[0].calcMinValue(width) - r, m_coords[1].calcMinValue(height) - r, 2 * r, 2 * r));
}
break;
case Rect:
if (m_coordsLen >= 4) {
int x0 = m_coords[0].calcMinValue(width);
int y0 = m_coords[1].calcMinValue(height);
int x1 = m_coords[2].calcMinValue(width);
int y1 = m_coords[3].calcMinValue(height);
path.addRect(FloatRect(x0, y0, x1 - x0, y1 - y0));
}
break;
case Default:
path.addRect(FloatRect(0, 0, width, height));
break;
case Unknown:
break;
}
return path;
}
HTMLImageElement* HTMLAreaElement::imageElement() const
{
Node* mapElement = parentNode();
if (!mapElement || !mapElement->hasTagName(mapTag))
return 0;
return static_cast<HTMLMapElement*>(mapElement)->imageElement();
}
bool HTMLAreaElement::isKeyboardFocusable(KeyboardEvent*) const
{
return isFocusable();
}
bool HTMLAreaElement::isMouseFocusable() const
{
return isFocusable();
}
bool HTMLAreaElement::isFocusable() const
{
return supportsFocus() && Element::tabIndex() >= 0;
}
void HTMLAreaElement::setFocus(bool shouldBeFocused)
{
if (focused() == shouldBeFocused)
return;
HTMLAnchorElement::setFocus(shouldBeFocused);
HTMLImageElement* imageElement = this->imageElement();
if (!imageElement)
return;
RenderObject* renderer = imageElement->renderer();
if (!renderer || !renderer->isImage())
return;
toRenderImage(renderer)->areaElementFocusChanged(this);
}
void HTMLAreaElement::updateFocusAppearance(bool restorePreviousSelection)
{
if (!isFocusable())
return;
HTMLImageElement* imageElement = this->imageElement();
if (!imageElement)
return;
imageElement->updateFocusAppearance(restorePreviousSelection);
}
bool HTMLAreaElement::supportsFocus() const
{
// If the AREA element was a link, it should support focus.
// The inherited method is not used because it assumes that a render object must exist
// for the element to support focus. AREA elements do not have render objects.
return isLink();
}
String HTMLAreaElement::target() const
{
return getAttribute(targetAttr);
}
}
|
