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, 2008 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 "HTMLImageElement.h"
24
25 #include "CSSHelper.h"
26 #include "CSSPropertyNames.h"
27 #include "CSSValueKeywords.h"
28 #include "EventNames.h"
29 #include "Frame.h"
30 #include "HTMLDocument.h"
31 #include "HTMLFormElement.h"
32 #include "HTMLNames.h"
33 #include "MappedAttribute.h"
34 #include "RenderImage.h"
35 #include "ScriptEventListener.h"
36
37 using namespace std;
38
39 namespace WebCore {
40
41 using namespace HTMLNames;
42
HTMLImageElement(const QualifiedName & tagName,Document * doc,HTMLFormElement * form)43 HTMLImageElement::HTMLImageElement(const QualifiedName& tagName, Document* doc, HTMLFormElement* form)
44 : HTMLElement(tagName, doc)
45 , m_imageLoader(this)
46 , ismap(false)
47 , m_form(form)
48 , m_compositeOperator(CompositeSourceOver)
49 {
50 ASSERT(hasTagName(imgTag));
51 if (form)
52 form->registerImgElement(this);
53 }
54
~HTMLImageElement()55 HTMLImageElement::~HTMLImageElement()
56 {
57 if (m_form)
58 m_form->removeImgElement(this);
59 }
60
mapToEntry(const QualifiedName & attrName,MappedAttributeEntry & result) const61 bool HTMLImageElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
62 {
63 if (attrName == widthAttr ||
64 attrName == heightAttr ||
65 attrName == vspaceAttr ||
66 attrName == hspaceAttr ||
67 attrName == valignAttr) {
68 result = eUniversal;
69 return false;
70 }
71
72 if (attrName == borderAttr || attrName == alignAttr) {
73 result = eReplaced; // Shared with embed and iframe elements.
74 return false;
75 }
76
77 return HTMLElement::mapToEntry(attrName, result);
78 }
79
parseMappedAttribute(MappedAttribute * attr)80 void HTMLImageElement::parseMappedAttribute(MappedAttribute* attr)
81 {
82 const QualifiedName& attrName = attr->name();
83 if (attrName == altAttr) {
84 if (renderer() && renderer()->isImage())
85 toRenderImage(renderer())->updateAltText();
86 } else if (attrName == srcAttr)
87 m_imageLoader.updateFromElementIgnoringPreviousError();
88 else if (attrName == widthAttr)
89 addCSSLength(attr, CSSPropertyWidth, attr->value());
90 else if (attrName == heightAttr)
91 addCSSLength(attr, CSSPropertyHeight, attr->value());
92 else if (attrName == borderAttr) {
93 // border="noborder" -> border="0"
94 addCSSLength(attr, CSSPropertyBorderWidth, attr->value().toInt() ? attr->value() : "0");
95 addCSSProperty(attr, CSSPropertyBorderTopStyle, CSSValueSolid);
96 addCSSProperty(attr, CSSPropertyBorderRightStyle, CSSValueSolid);
97 addCSSProperty(attr, CSSPropertyBorderBottomStyle, CSSValueSolid);
98 addCSSProperty(attr, CSSPropertyBorderLeftStyle, CSSValueSolid);
99 } else if (attrName == vspaceAttr) {
100 addCSSLength(attr, CSSPropertyMarginTop, attr->value());
101 addCSSLength(attr, CSSPropertyMarginBottom, attr->value());
102 } else if (attrName == hspaceAttr) {
103 addCSSLength(attr, CSSPropertyMarginLeft, attr->value());
104 addCSSLength(attr, CSSPropertyMarginRight, attr->value());
105 } else if (attrName == alignAttr)
106 addHTMLAlignment(attr);
107 else if (attrName == valignAttr)
108 addCSSProperty(attr, CSSPropertyVerticalAlign, attr->value());
109 else if (attrName == usemapAttr) {
110 if (attr->value().string()[0] == '#')
111 usemap = attr->value();
112 else
113 usemap = document()->completeURL(deprecatedParseURL(attr->value())).string();
114 setIsLink(!attr->isNull());
115 } else if (attrName == ismapAttr)
116 ismap = true;
117 else if (attrName == onabortAttr)
118 setAttributeEventListener(eventNames().abortEvent, createAttributeEventListener(this, attr));
119 else if (attrName == onloadAttr)
120 setAttributeEventListener(eventNames().loadEvent, createAttributeEventListener(this, attr));
121 else if (attrName == compositeAttr) {
122 if (!parseCompositeOperator(attr->value(), m_compositeOperator))
123 m_compositeOperator = CompositeSourceOver;
124 } else if (attrName == nameAttr) {
125 const AtomicString& newName = attr->value();
126 if (inDocument() && document()->isHTMLDocument()) {
127 HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
128 document->removeNamedItem(m_name);
129 document->addNamedItem(newName);
130 }
131 m_name = newName;
132 } else if (attr->name() == idAttr) {
133 const AtomicString& newId = attr->value();
134 if (inDocument() && document()->isHTMLDocument()) {
135 HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
136 document->removeExtraNamedItem(m_id);
137 document->addExtraNamedItem(newId);
138 }
139 m_id = newId;
140 // also call superclass
141 HTMLElement::parseMappedAttribute(attr);
142 } else
143 HTMLElement::parseMappedAttribute(attr);
144 }
145
altText() const146 String HTMLImageElement::altText() const
147 {
148 // lets figure out the alt text.. magic stuff
149 // http://www.w3.org/TR/1998/REC-html40-19980424/appendix/notes.html#altgen
150 // also heavily discussed by Hixie on bugzilla
151 String alt = getAttribute(altAttr);
152 // fall back to title attribute
153 if (alt.isNull())
154 alt = getAttribute(titleAttr);
155 return alt;
156 }
157
createRenderer(RenderArena * arena,RenderStyle * style)158 RenderObject* HTMLImageElement::createRenderer(RenderArena* arena, RenderStyle* style)
159 {
160 if (style->contentData())
161 return RenderObject::createObject(this, style);
162
163 return new (arena) RenderImage(this);
164 }
165
attach()166 void HTMLImageElement::attach()
167 {
168 HTMLElement::attach();
169
170 if (renderer() && renderer()->isImage()) {
171 RenderImage* imageObj = toRenderImage(renderer());
172 if (imageObj->hasImage())
173 return;
174 imageObj->setCachedImage(m_imageLoader.image());
175
176 // If we have no image at all because we have no src attribute, set
177 // image height and width for the alt text instead.
178 if (!m_imageLoader.image() && !imageObj->cachedImage())
179 imageObj->setImageSizeForAltText();
180 }
181 }
182
insertedIntoDocument()183 void HTMLImageElement::insertedIntoDocument()
184 {
185 if (document()->isHTMLDocument()) {
186 HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
187 document->addNamedItem(m_name);
188 document->addExtraNamedItem(m_id);
189 }
190
191 // If we have been inserted from a renderer-less document,
192 // our loader may have not fetched the image, so do it now.
193 if (!m_imageLoader.image())
194 m_imageLoader.updateFromElement();
195
196 HTMLElement::insertedIntoDocument();
197 }
198
removedFromDocument()199 void HTMLImageElement::removedFromDocument()
200 {
201 if (document()->isHTMLDocument()) {
202 HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
203 document->removeNamedItem(m_name);
204 document->removeExtraNamedItem(m_id);
205 }
206
207 HTMLElement::removedFromDocument();
208 }
209
width(bool ignorePendingStylesheets) const210 int HTMLImageElement::width(bool ignorePendingStylesheets) const
211 {
212 if (!renderer()) {
213 // check the attribute first for an explicit pixel value
214 bool ok;
215 int width = getAttribute(widthAttr).toInt(&ok);
216 if (ok)
217 return width;
218
219 // if the image is available, use its width
220 if (m_imageLoader.image()) {
221 float zoomFactor = document()->frame() ? document()->frame()->pageZoomFactor() : 1.0f;
222 return m_imageLoader.image()->imageSize(zoomFactor).width();
223 }
224 }
225
226 if (ignorePendingStylesheets)
227 document()->updateLayoutIgnorePendingStylesheets();
228 else
229 document()->updateLayout();
230
231 return renderBox() ? renderBox()->contentWidth() : 0;
232 }
233
height(bool ignorePendingStylesheets) const234 int HTMLImageElement::height(bool ignorePendingStylesheets) const
235 {
236 if (!renderer()) {
237 // check the attribute first for an explicit pixel value
238 bool ok;
239 int height = getAttribute(heightAttr).toInt(&ok);
240 if (ok)
241 return height;
242
243 // if the image is available, use its height
244 if (m_imageLoader.image()) {
245 float zoomFactor = document()->frame() ? document()->frame()->pageZoomFactor() : 1.0f;
246 return m_imageLoader.image()->imageSize(zoomFactor).height();
247 }
248 }
249
250 if (ignorePendingStylesheets)
251 document()->updateLayoutIgnorePendingStylesheets();
252 else
253 document()->updateLayout();
254
255 return renderBox() ? renderBox()->contentHeight() : 0;
256 }
257
naturalWidth() const258 int HTMLImageElement::naturalWidth() const
259 {
260 if (!m_imageLoader.image())
261 return 0;
262
263 return m_imageLoader.image()->imageSize(1.0f).width();
264 }
265
naturalHeight() const266 int HTMLImageElement::naturalHeight() const
267 {
268 if (!m_imageLoader.image())
269 return 0;
270
271 return m_imageLoader.image()->imageSize(1.0f).height();
272 }
273
isURLAttribute(Attribute * attr) const274 bool HTMLImageElement::isURLAttribute(Attribute* attr) const
275 {
276 return attr->name() == srcAttr
277 || attr->name() == lowsrcAttr
278 || attr->name() == longdescAttr
279 || (attr->name() == usemapAttr && attr->value().string()[0] != '#');
280 }
281
name() const282 String HTMLImageElement::name() const
283 {
284 return getAttribute(nameAttr);
285 }
286
setName(const String & value)287 void HTMLImageElement::setName(const String& value)
288 {
289 setAttribute(nameAttr, value);
290 }
291
align() const292 String HTMLImageElement::align() const
293 {
294 return getAttribute(alignAttr);
295 }
296
setAlign(const String & value)297 void HTMLImageElement::setAlign(const String& value)
298 {
299 setAttribute(alignAttr, value);
300 }
301
alt() const302 String HTMLImageElement::alt() const
303 {
304 return getAttribute(altAttr);
305 }
306
setAlt(const String & value)307 void HTMLImageElement::setAlt(const String& value)
308 {
309 setAttribute(altAttr, value);
310 }
311
border() const312 String HTMLImageElement::border() const
313 {
314 return getAttribute(borderAttr);
315 }
316
setBorder(const String & value)317 void HTMLImageElement::setBorder(const String& value)
318 {
319 setAttribute(borderAttr, value);
320 }
321
draggable() const322 bool HTMLImageElement::draggable() const
323 {
324 // Image elements are draggable by default.
325 return !equalIgnoringCase(getAttribute(draggableAttr), "false");
326 }
327
setHeight(int value)328 void HTMLImageElement::setHeight(int value)
329 {
330 setAttribute(heightAttr, String::number(value));
331 }
332
hspace() const333 int HTMLImageElement::hspace() const
334 {
335 // ### return actual value
336 return getAttribute(hspaceAttr).toInt();
337 }
338
setHspace(int value)339 void HTMLImageElement::setHspace(int value)
340 {
341 setAttribute(hspaceAttr, String::number(value));
342 }
343
isMap() const344 bool HTMLImageElement::isMap() const
345 {
346 return !getAttribute(ismapAttr).isNull();
347 }
348
setIsMap(bool isMap)349 void HTMLImageElement::setIsMap(bool isMap)
350 {
351 setAttribute(ismapAttr, isMap ? "" : 0);
352 }
353
longDesc() const354 KURL HTMLImageElement::longDesc() const
355 {
356 return document()->completeURL(getAttribute(longdescAttr));
357 }
358
setLongDesc(const String & value)359 void HTMLImageElement::setLongDesc(const String& value)
360 {
361 setAttribute(longdescAttr, value);
362 }
363
lowsrc() const364 KURL HTMLImageElement::lowsrc() const
365 {
366 return document()->completeURL(getAttribute(lowsrcAttr));
367 }
368
setLowsrc(const String & value)369 void HTMLImageElement::setLowsrc(const String& value)
370 {
371 setAttribute(lowsrcAttr, value);
372 }
373
src() const374 KURL HTMLImageElement::src() const
375 {
376 return document()->completeURL(getAttribute(srcAttr));
377 }
378
setSrc(const String & value)379 void HTMLImageElement::setSrc(const String& value)
380 {
381 setAttribute(srcAttr, value);
382 }
383
useMap() const384 String HTMLImageElement::useMap() const
385 {
386 return getAttribute(usemapAttr);
387 }
388
setUseMap(const String & value)389 void HTMLImageElement::setUseMap(const String& value)
390 {
391 setAttribute(usemapAttr, value);
392 }
393
vspace() const394 int HTMLImageElement::vspace() const
395 {
396 // ### return actual vspace
397 return getAttribute(vspaceAttr).toInt();
398 }
399
setVspace(int value)400 void HTMLImageElement::setVspace(int value)
401 {
402 setAttribute(vspaceAttr, String::number(value));
403 }
404
setWidth(int value)405 void HTMLImageElement::setWidth(int value)
406 {
407 setAttribute(widthAttr, String::number(value));
408 }
409
x() const410 int HTMLImageElement::x() const
411 {
412 RenderObject* r = renderer();
413 if (!r)
414 return 0;
415
416 // FIXME: This doesn't work correctly with transforms.
417 FloatPoint absPos = r->localToAbsolute();
418 return absPos.x();
419 }
420
y() const421 int HTMLImageElement::y() const
422 {
423 RenderObject* r = renderer();
424 if (!r)
425 return 0;
426
427 // FIXME: This doesn't work correctly with transforms.
428 FloatPoint absPos = r->localToAbsolute();
429 return absPos.y();
430 }
431
complete() const432 bool HTMLImageElement::complete() const
433 {
434 return m_imageLoader.imageComplete();
435 }
436
addSubresourceAttributeURLs(ListHashSet<KURL> & urls) const437 void HTMLImageElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
438 {
439 HTMLElement::addSubresourceAttributeURLs(urls);
440
441 addSubresourceURL(urls, src());
442 addSubresourceURL(urls, document()->completeURL(useMap()));
443 }
444
445 }
446