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  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Library General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Library General Public License for more details.
16  *
17  * You should have received a copy of the GNU Library General Public License
18  * along with this library; see the file COPYING.LIB.  If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20  * Boston, MA 02110-1301, USA.
21  *
22  */
23 
24 #include "config.h"
25 #include "HTMLElement.h"
26 
27 #include "Attribute.h"
28 #include "CSSPropertyNames.h"
29 #include "CSSValueKeywords.h"
30 #include "DocumentFragment.h"
31 #include "Event.h"
32 #include "EventListener.h"
33 #include "EventNames.h"
34 #include "ExceptionCode.h"
35 #include "Frame.h"
36 #include "HTMLBRElement.h"
37 #include "HTMLCollection.h"
38 #include "HTMLDocument.h"
39 #include "HTMLElementFactory.h"
40 #include "HTMLFormElement.h"
41 #include "HTMLNames.h"
42 #include "HTMLParserIdioms.h"
43 #include "RenderWordBreak.h"
44 #include "ScriptEventListener.h"
45 #include "Settings.h"
46 #include "Text.h"
47 #include "TextIterator.h"
48 #include "markup.h"
49 #include <wtf/StdLibExtras.h>
50 #include <wtf/text/CString.h>
51 
52 namespace WebCore {
53 
54 using namespace HTMLNames;
55 
56 using std::min;
57 using std::max;
58 
create(const QualifiedName & tagName,Document * document)59 PassRefPtr<HTMLElement> HTMLElement::create(const QualifiedName& tagName, Document* document)
60 {
61     return adoptRef(new HTMLElement(tagName, document));
62 }
63 
nodeName() const64 String HTMLElement::nodeName() const
65 {
66     // FIXME: Would be nice to have an atomicstring lookup based off uppercase
67     // chars that does not have to copy the string on a hit in the hash.
68     // FIXME: We should have a way to detect XHTML elements and replace the hasPrefix() check with it.
69     if (document()->isHTMLDocument() && !tagQName().hasPrefix())
70         return tagQName().localNameUpper();
71     return Element::nodeName();
72 }
73 
ieForbidsInsertHTML() const74 bool HTMLElement::ieForbidsInsertHTML() const
75 {
76     // FIXME: Supposedly IE disallows settting innerHTML, outerHTML
77     // and createContextualFragment on these tags.  We have no tests to
78     // verify this however, so this list could be totally wrong.
79     // This list was moved from the previous endTagRequirement() implementation.
80     // This is also called from editing and assumed to be the list of tags
81     // for which no end tag should be serialized. It's unclear if the list for
82     // IE compat and the list for serialization sanity are the same.
83     if (hasLocalName(areaTag)
84         || hasLocalName(baseTag)
85         || hasLocalName(basefontTag)
86         || hasLocalName(brTag)
87         || hasLocalName(colTag)
88         || hasLocalName(embedTag)
89         || hasLocalName(frameTag)
90         || hasLocalName(hrTag)
91         || hasLocalName(imageTag)
92         || hasLocalName(imgTag)
93         || hasLocalName(inputTag)
94         || hasLocalName(isindexTag)
95         || hasLocalName(linkTag)
96         || hasLocalName(metaTag)
97         || hasLocalName(paramTag)
98         || hasLocalName(sourceTag)
99         || hasLocalName(wbrTag))
100         return true;
101     // FIXME: I'm not sure why dashboard mode would want to change the
102     // serialization of <canvas>, that seems like a bad idea.
103 #if ENABLE(DASHBOARD_SUPPORT)
104     if (hasLocalName(canvasTag)) {
105         Settings* settings = document()->settings();
106         if (settings && settings->usesDashboardBackwardCompatibilityMode())
107             return true;
108     }
109 #endif
110     return false;
111 }
112 
mapToEntry(const QualifiedName & attrName,MappedAttributeEntry & result) const113 bool HTMLElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
114 {
115     if (attrName == alignAttr
116         || attrName == contenteditableAttr
117         || attrName == hiddenAttr) {
118         result = eUniversal;
119         return false;
120     }
121     if (attrName == dirAttr) {
122         result = hasLocalName(bdoTag) ? eBDO : eUniversal;
123         return true;
124     }
125 
126     return StyledElement::mapToEntry(attrName, result);
127 }
128 
parseMappedAttribute(Attribute * attr)129 void HTMLElement::parseMappedAttribute(Attribute* attr)
130 {
131     if (isIdAttributeName(attr->name()) || attr->name() == classAttr || attr->name() == styleAttr)
132         return StyledElement::parseMappedAttribute(attr);
133 
134     String indexstring;
135     if (attr->name() == alignAttr) {
136         if (equalIgnoringCase(attr->value(), "middle"))
137             addCSSProperty(attr, CSSPropertyTextAlign, "center");
138         else
139             addCSSProperty(attr, CSSPropertyTextAlign, attr->value());
140     } else if (attr->name() == contenteditableAttr) {
141         setContentEditable(attr);
142     } else if (attr->name() == hiddenAttr) {
143         addCSSProperty(attr, CSSPropertyDisplay, CSSValueNone);
144     } else if (attr->name() == tabindexAttr) {
145         indexstring = getAttribute(tabindexAttr);
146         int tabindex = 0;
147         if (!indexstring.length()) {
148             clearTabIndexExplicitly();
149         } else if (parseHTMLInteger(indexstring, tabindex)) {
150             // Clamp tabindex to the range of 'short' to match Firefox's behavior.
151             setTabIndexExplicitly(max(static_cast<int>(std::numeric_limits<short>::min()), min(tabindex, static_cast<int>(std::numeric_limits<short>::max()))));
152         }
153     } else if (attr->name() == langAttr) {
154         // FIXME: Implement
155     } else if (attr->name() == dirAttr) {
156         if (!equalIgnoringCase(attr->value(), "auto"))
157             addCSSProperty(attr, CSSPropertyDirection, attr->value());
158         dirAttributeChanged(attr);
159         addCSSProperty(attr, CSSPropertyUnicodeBidi, hasLocalName(bdoTag) ? CSSValueBidiOverride : CSSValueEmbed);
160     } else if (attr->name() == draggableAttr) {
161         const AtomicString& value = attr->value();
162         if (equalIgnoringCase(value, "true")) {
163             addCSSProperty(attr, CSSPropertyWebkitUserDrag, CSSValueElement);
164             addCSSProperty(attr, CSSPropertyWebkitUserSelect, CSSValueNone);
165         } else if (equalIgnoringCase(value, "false"))
166             addCSSProperty(attr, CSSPropertyWebkitUserDrag, CSSValueNone);
167     }
168 // standard events
169     else if (attr->name() == onclickAttr) {
170         setAttributeEventListener(eventNames().clickEvent, createAttributeEventListener(this, attr));
171     } else if (attr->name() == oncontextmenuAttr) {
172         setAttributeEventListener(eventNames().contextmenuEvent, createAttributeEventListener(this, attr));
173     } else if (attr->name() == ondblclickAttr) {
174         setAttributeEventListener(eventNames().dblclickEvent, createAttributeEventListener(this, attr));
175     } else if (attr->name() == onmousedownAttr) {
176         setAttributeEventListener(eventNames().mousedownEvent, createAttributeEventListener(this, attr));
177     } else if (attr->name() == onmousemoveAttr) {
178         setAttributeEventListener(eventNames().mousemoveEvent, createAttributeEventListener(this, attr));
179     } else if (attr->name() == onmouseoutAttr) {
180         setAttributeEventListener(eventNames().mouseoutEvent, createAttributeEventListener(this, attr));
181     } else if (attr->name() == onmouseoverAttr) {
182         setAttributeEventListener(eventNames().mouseoverEvent, createAttributeEventListener(this, attr));
183     } else if (attr->name() == onmouseupAttr) {
184         setAttributeEventListener(eventNames().mouseupEvent, createAttributeEventListener(this, attr));
185     } else if (attr->name() == onmousewheelAttr) {
186         setAttributeEventListener(eventNames().mousewheelEvent, createAttributeEventListener(this, attr));
187     } else if (attr->name() == onfocusAttr) {
188         setAttributeEventListener(eventNames().focusEvent, createAttributeEventListener(this, attr));
189     } else if (attr->name() == onfocusinAttr) {
190         setAttributeEventListener(eventNames().focusinEvent, createAttributeEventListener(this, attr));
191     } else if (attr->name() == onfocusoutAttr) {
192         setAttributeEventListener(eventNames().focusoutEvent, createAttributeEventListener(this, attr));
193     } else if (attr->name() == onblurAttr) {
194         setAttributeEventListener(eventNames().blurEvent, createAttributeEventListener(this, attr));
195     } else if (attr->name() == onkeydownAttr) {
196         setAttributeEventListener(eventNames().keydownEvent, createAttributeEventListener(this, attr));
197     } else if (attr->name() == onkeypressAttr) {
198         setAttributeEventListener(eventNames().keypressEvent, createAttributeEventListener(this, attr));
199     } else if (attr->name() == onkeyupAttr) {
200         setAttributeEventListener(eventNames().keyupEvent, createAttributeEventListener(this, attr));
201     } else if (attr->name() == onscrollAttr) {
202         setAttributeEventListener(eventNames().scrollEvent, createAttributeEventListener(this, attr));
203     } else if (attr->name() == onbeforecutAttr) {
204         setAttributeEventListener(eventNames().beforecutEvent, createAttributeEventListener(this, attr));
205     } else if (attr->name() == oncutAttr) {
206         setAttributeEventListener(eventNames().cutEvent, createAttributeEventListener(this, attr));
207     } else if (attr->name() == onbeforecopyAttr) {
208         setAttributeEventListener(eventNames().beforecopyEvent, createAttributeEventListener(this, attr));
209     } else if (attr->name() == oncopyAttr) {
210         setAttributeEventListener(eventNames().copyEvent, createAttributeEventListener(this, attr));
211     } else if (attr->name() == onbeforepasteAttr) {
212         setAttributeEventListener(eventNames().beforepasteEvent, createAttributeEventListener(this, attr));
213     } else if (attr->name() == onpasteAttr) {
214         setAttributeEventListener(eventNames().pasteEvent, createAttributeEventListener(this, attr));
215     } else if (attr->name() == ondragenterAttr) {
216         setAttributeEventListener(eventNames().dragenterEvent, createAttributeEventListener(this, attr));
217     } else if (attr->name() == ondragoverAttr) {
218         setAttributeEventListener(eventNames().dragoverEvent, createAttributeEventListener(this, attr));
219     } else if (attr->name() == ondragleaveAttr) {
220         setAttributeEventListener(eventNames().dragleaveEvent, createAttributeEventListener(this, attr));
221     } else if (attr->name() == ondropAttr) {
222         setAttributeEventListener(eventNames().dropEvent, createAttributeEventListener(this, attr));
223     } else if (attr->name() == ondragstartAttr) {
224         setAttributeEventListener(eventNames().dragstartEvent, createAttributeEventListener(this, attr));
225     } else if (attr->name() == ondragAttr) {
226         setAttributeEventListener(eventNames().dragEvent, createAttributeEventListener(this, attr));
227     } else if (attr->name() == ondragendAttr) {
228         setAttributeEventListener(eventNames().dragendEvent, createAttributeEventListener(this, attr));
229     } else if (attr->name() == onselectstartAttr) {
230         setAttributeEventListener(eventNames().selectstartEvent, createAttributeEventListener(this, attr));
231     } else if (attr->name() == onsubmitAttr) {
232         setAttributeEventListener(eventNames().submitEvent, createAttributeEventListener(this, attr));
233     } else if (attr->name() == onerrorAttr) {
234         setAttributeEventListener(eventNames().errorEvent, createAttributeEventListener(this, attr));
235     } else if (attr->name() == onwebkitanimationstartAttr) {
236         setAttributeEventListener(eventNames().webkitAnimationStartEvent, createAttributeEventListener(this, attr));
237     } else if (attr->name() == onwebkitanimationiterationAttr) {
238         setAttributeEventListener(eventNames().webkitAnimationIterationEvent, createAttributeEventListener(this, attr));
239     } else if (attr->name() == onwebkitanimationendAttr) {
240         setAttributeEventListener(eventNames().webkitAnimationEndEvent, createAttributeEventListener(this, attr));
241     } else if (attr->name() == onwebkittransitionendAttr) {
242         setAttributeEventListener(eventNames().webkitTransitionEndEvent, createAttributeEventListener(this, attr));
243     } else if (attr->name() == oninputAttr) {
244         setAttributeEventListener(eventNames().inputEvent, createAttributeEventListener(this, attr));
245     } else if (attr->name() == oninvalidAttr) {
246         setAttributeEventListener(eventNames().invalidEvent, createAttributeEventListener(this, attr));
247     } else if (attr->name() == ontouchstartAttr) {
248         setAttributeEventListener(eventNames().touchstartEvent, createAttributeEventListener(this, attr));
249     } else if (attr->name() == ontouchmoveAttr) {
250         setAttributeEventListener(eventNames().touchmoveEvent, createAttributeEventListener(this, attr));
251     } else if (attr->name() == ontouchendAttr) {
252         setAttributeEventListener(eventNames().touchendEvent, createAttributeEventListener(this, attr));
253     } else if (attr->name() == ontouchcancelAttr) {
254         setAttributeEventListener(eventNames().touchcancelEvent, createAttributeEventListener(this, attr));
255 #if ENABLE(FULLSCREEN_API)
256     } else if (attr->name() == onwebkitfullscreenchangeAttr) {
257         setAttributeEventListener(eventNames().webkitfullscreenchangeEvent, createAttributeEventListener(this, attr));
258 #endif
259     }
260 }
261 
innerHTML() const262 String HTMLElement::innerHTML() const
263 {
264     return createMarkup(this, ChildrenOnly);
265 }
266 
outerHTML() const267 String HTMLElement::outerHTML() const
268 {
269     return createMarkup(this);
270 }
271 
272 // FIXME: This logic should move into Range::createContextualFragment
deprecatedCreateContextualFragment(const String & markup,FragmentScriptingPermission scriptingPermission)273 PassRefPtr<DocumentFragment> HTMLElement::deprecatedCreateContextualFragment(const String& markup, FragmentScriptingPermission scriptingPermission)
274 {
275     // The following is in accordance with the definition as used by IE.
276     if (ieForbidsInsertHTML())
277         return 0;
278 
279     if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag)
280         || hasLocalName(headTag) || hasLocalName(styleTag) || hasLocalName(titleTag))
281         return 0;
282 
283     return Element::deprecatedCreateContextualFragment(markup, scriptingPermission);
284 }
285 
hasOneChild(ContainerNode * node)286 static inline bool hasOneChild(ContainerNode* node)
287 {
288     Node* firstChild = node->firstChild();
289     return firstChild && !firstChild->nextSibling();
290 }
291 
hasOneTextChild(ContainerNode * node)292 static inline bool hasOneTextChild(ContainerNode* node)
293 {
294     return hasOneChild(node) && node->firstChild()->isTextNode();
295 }
296 
replaceChildrenWithFragment(HTMLElement * element,PassRefPtr<DocumentFragment> fragment,ExceptionCode & ec)297 static void replaceChildrenWithFragment(HTMLElement* element, PassRefPtr<DocumentFragment> fragment, ExceptionCode& ec)
298 {
299     if (!fragment->firstChild()) {
300         element->removeChildren();
301         return;
302     }
303 
304     if (hasOneTextChild(element) && hasOneTextChild(fragment.get())) {
305         static_cast<Text*>(element->firstChild())->setData(static_cast<Text*>(fragment->firstChild())->data(), ec);
306         return;
307     }
308 
309     if (hasOneChild(element)) {
310         element->replaceChild(fragment, element->firstChild(), ec);
311         return;
312     }
313 
314     element->removeChildren();
315     element->appendChild(fragment, ec);
316 }
317 
replaceChildrenWithText(HTMLElement * element,const String & text,ExceptionCode & ec)318 static void replaceChildrenWithText(HTMLElement* element, const String& text, ExceptionCode& ec)
319 {
320     if (hasOneTextChild(element)) {
321         static_cast<Text*>(element->firstChild())->setData(text, ec);
322         return;
323     }
324 
325     RefPtr<Text> textNode = Text::create(element->document(), text);
326 
327     if (hasOneChild(element)) {
328         element->replaceChild(textNode.release(), element->firstChild(), ec);
329         return;
330     }
331 
332     element->removeChildren();
333     element->appendChild(textNode.release(), ec);
334 }
335 
336 // We may want to move a version of this function into DocumentFragment.h/cpp
createFragmentFromSource(const String & markup,Element * contextElement,ExceptionCode & ec)337 static PassRefPtr<DocumentFragment> createFragmentFromSource(const String& markup, Element* contextElement, ExceptionCode& ec)
338 {
339     Document* document = contextElement->document();
340     RefPtr<DocumentFragment> fragment;
341 
342     fragment = DocumentFragment::create(document);
343     if (document->isHTMLDocument()) {
344         fragment->parseHTML(markup, contextElement);
345         return fragment;
346     }
347 
348     bool wasValid = fragment->parseXML(markup, contextElement);
349     if (!wasValid) {
350         ec = INVALID_STATE_ERR;
351         return 0;
352     }
353     return fragment;
354 }
355 
setInnerHTML(const String & html,ExceptionCode & ec)356 void HTMLElement::setInnerHTML(const String& html, ExceptionCode& ec)
357 {
358     RefPtr<DocumentFragment> fragment = createFragmentFromSource(html, this, ec);
359     if (fragment)
360         replaceChildrenWithFragment(this, fragment.release(), ec);
361 }
362 
mergeWithNextTextNode(PassRefPtr<Node> node,ExceptionCode & ec)363 static void mergeWithNextTextNode(PassRefPtr<Node> node, ExceptionCode& ec)
364 {
365     ASSERT(node && node->isTextNode());
366     Node* next = node->nextSibling();
367     if (!next || !next->isTextNode())
368         return;
369 
370     RefPtr<Text> textNode = static_cast<Text*>(node.get());
371     RefPtr<Text> textNext = static_cast<Text*>(next);
372     textNode->appendData(textNext->data(), ec);
373     if (ec)
374         return;
375     if (textNext->parentNode()) // Might have been removed by mutation event.
376         textNext->remove(ec);
377 }
378 
setOuterHTML(const String & html,ExceptionCode & ec)379 void HTMLElement::setOuterHTML(const String& html, ExceptionCode& ec)
380 {
381     Node* p = parentNode();
382     if (!p || !p->isHTMLElement()) {
383         ec = NO_MODIFICATION_ALLOWED_ERR;
384         return;
385     }
386     RefPtr<HTMLElement> parent = static_cast<HTMLElement*>(p);
387     RefPtr<Node> prev = previousSibling();
388     RefPtr<Node> next = nextSibling();
389 
390     RefPtr<DocumentFragment> fragment = createFragmentFromSource(html, parent.get(), ec);
391     if (ec)
392         return;
393 
394     parent->replaceChild(fragment.release(), this, ec);
395     RefPtr<Node> node = next ? next->previousSibling() : 0;
396     if (!ec && node && node->isTextNode())
397         mergeWithNextTextNode(node.release(), ec);
398 
399     if (!ec && prev && prev->isTextNode())
400         mergeWithNextTextNode(prev.release(), ec);
401 }
402 
textToFragment(const String & text,ExceptionCode & ec)403 PassRefPtr<DocumentFragment> HTMLElement::textToFragment(const String& text, ExceptionCode& ec)
404 {
405     RefPtr<DocumentFragment> fragment = DocumentFragment::create(document());
406     unsigned int i, length = text.length();
407     UChar c = 0;
408     for (unsigned int start = 0; start < length; ) {
409 
410         // Find next line break.
411         for (i = start; i < length; i++) {
412           c = text[i];
413           if (c == '\r' || c == '\n')
414               break;
415         }
416 
417         fragment->appendChild(Text::create(document(), text.substring(start, i - start)), ec);
418         if (ec)
419             return 0;
420 
421         if (c == '\r' || c == '\n') {
422             fragment->appendChild(HTMLBRElement::create(document()), ec);
423             if (ec)
424                 return 0;
425             // Make sure \r\n doesn't result in two line breaks.
426             if (c == '\r' && i + 1 < length && text[i + 1] == '\n')
427                 i++;
428         }
429 
430         start = i + 1; // Character after line break.
431     }
432 
433     return fragment;
434 }
435 
setInnerText(const String & text,ExceptionCode & ec)436 void HTMLElement::setInnerText(const String& text, ExceptionCode& ec)
437 {
438     if (ieForbidsInsertHTML()) {
439         ec = NO_MODIFICATION_ALLOWED_ERR;
440         return;
441     }
442     if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) ||
443         hasLocalName(headTag) || hasLocalName(htmlTag) || hasLocalName(tableTag) ||
444         hasLocalName(tbodyTag) || hasLocalName(tfootTag) || hasLocalName(theadTag) ||
445         hasLocalName(trTag)) {
446         ec = NO_MODIFICATION_ALLOWED_ERR;
447         return;
448     }
449 
450     // FIXME: This doesn't take whitespace collapsing into account at all.
451 
452     if (!text.contains('\n') && !text.contains('\r')) {
453         if (text.isEmpty()) {
454             removeChildren();
455             return;
456         }
457         replaceChildrenWithText(this, text, ec);
458         return;
459     }
460 
461     // FIXME: Do we need to be able to detect preserveNewline style even when there's no renderer?
462     // FIXME: Can the renderer be out of date here? Do we need to call updateStyleIfNeeded?
463     // For example, for the contents of textarea elements that are display:none?
464     RenderObject* r = renderer();
465     if (r && r->style()->preserveNewline()) {
466         if (!text.contains('\r')) {
467             replaceChildrenWithText(this, text, ec);
468             return;
469         }
470         String textWithConsistentLineBreaks = text;
471         textWithConsistentLineBreaks.replace("\r\n", "\n");
472         textWithConsistentLineBreaks.replace('\r', '\n');
473         replaceChildrenWithText(this, textWithConsistentLineBreaks, ec);
474         return;
475     }
476 
477     // Add text nodes and <br> elements.
478     ec = 0;
479     RefPtr<DocumentFragment> fragment = textToFragment(text, ec);
480     if (!ec)
481         replaceChildrenWithFragment(this, fragment.release(), ec);
482 }
483 
setOuterText(const String & text,ExceptionCode & ec)484 void HTMLElement::setOuterText(const String &text, ExceptionCode& ec)
485 {
486     if (ieForbidsInsertHTML()) {
487         ec = NO_MODIFICATION_ALLOWED_ERR;
488         return;
489     }
490     if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) ||
491         hasLocalName(headTag) || hasLocalName(htmlTag) || hasLocalName(tableTag) ||
492         hasLocalName(tbodyTag) || hasLocalName(tfootTag) || hasLocalName(theadTag) ||
493         hasLocalName(trTag)) {
494         ec = NO_MODIFICATION_ALLOWED_ERR;
495         return;
496     }
497 
498     ContainerNode* parent = parentNode();
499     if (!parent) {
500         ec = NO_MODIFICATION_ALLOWED_ERR;
501         return;
502     }
503 
504     RefPtr<Node> prev = previousSibling();
505     RefPtr<Node> next = nextSibling();
506     RefPtr<Node> newChild;
507     ec = 0;
508 
509     // Convert text to fragment with <br> tags instead of linebreaks if needed.
510     if (text.contains('\r') || text.contains('\n'))
511         newChild = textToFragment(text, ec);
512     else
513         newChild = Text::create(document(), text);
514 
515     if (!this || !parentNode())
516         ec = HIERARCHY_REQUEST_ERR;
517     if (ec)
518         return;
519     parent->replaceChild(newChild.release(), this, ec);
520 
521     RefPtr<Node> node = next ? next->previousSibling() : 0;
522     if (!ec && node && node->isTextNode())
523         mergeWithNextTextNode(node.release(), ec);
524 
525     if (!ec && prev && prev->isTextNode())
526         mergeWithNextTextNode(prev.release(), ec);
527 }
528 
insertAdjacent(const String & where,Node * newChild,ExceptionCode & ec)529 Node* HTMLElement::insertAdjacent(const String& where, Node* newChild, ExceptionCode& ec)
530 {
531     // In Internet Explorer if the element has no parent and where is "beforeBegin" or "afterEnd",
532     // a document fragment is created and the elements appended in the correct order. This document
533     // fragment isn't returned anywhere.
534     //
535     // This is impossible for us to implement as the DOM tree does not allow for such structures,
536     // Opera also appears to disallow such usage.
537 
538     if (equalIgnoringCase(where, "beforeBegin")) {
539         ContainerNode* parent = this->parentNode();
540         return (parent && parent->insertBefore(newChild, this, ec)) ? newChild : 0;
541     }
542 
543     if (equalIgnoringCase(where, "afterBegin"))
544         return insertBefore(newChild, firstChild(), ec) ? newChild : 0;
545 
546     if (equalIgnoringCase(where, "beforeEnd"))
547         return appendChild(newChild, ec) ? newChild : 0;
548 
549     if (equalIgnoringCase(where, "afterEnd")) {
550         ContainerNode* parent = this->parentNode();
551         return (parent && parent->insertBefore(newChild, nextSibling(), ec)) ? newChild : 0;
552     }
553 
554     // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative.
555     ec = NOT_SUPPORTED_ERR;
556     return 0;
557 }
558 
insertAdjacentElement(const String & where,Element * newChild,ExceptionCode & ec)559 Element* HTMLElement::insertAdjacentElement(const String& where, Element* newChild, ExceptionCode& ec)
560 {
561     if (!newChild) {
562         // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative.
563         ec = TYPE_MISMATCH_ERR;
564         return 0;
565     }
566 
567     Node* returnValue = insertAdjacent(where, newChild, ec);
568     ASSERT(!returnValue || returnValue->isElementNode());
569     return static_cast<Element*>(returnValue);
570 }
571 
572 // Step 3 of http://www.whatwg.org/specs/web-apps/current-work/multipage/apis-in-html-documents.html#insertadjacenthtml()
contextElementForInsertion(const String & where,Element * element,ExceptionCode & ec)573 static Element* contextElementForInsertion(const String& where, Element* element, ExceptionCode& ec)
574 {
575     if (equalIgnoringCase(where, "beforeBegin") || equalIgnoringCase(where, "afterEnd")) {
576         ContainerNode* parent = element->parentNode();
577         if (parent && parent->isDocumentNode()) {
578             ec = NO_MODIFICATION_ALLOWED_ERR;
579             return 0;
580         }
581         ASSERT(!parent || parent->isElementNode());
582         return static_cast<Element*>(parent);
583     }
584     if (equalIgnoringCase(where, "afterBegin") || equalIgnoringCase(where, "beforeEnd"))
585         return element;
586     ec =  SYNTAX_ERR;
587     return 0;
588 }
589 
insertAdjacentHTML(const String & where,const String & markup,ExceptionCode & ec)590 void HTMLElement::insertAdjacentHTML(const String& where, const String& markup, ExceptionCode& ec)
591 {
592     RefPtr<DocumentFragment> fragment = document()->createDocumentFragment();
593     Element* contextElement = contextElementForInsertion(where, this, ec);
594     if (!contextElement)
595         return;
596 
597     if (document()->isHTMLDocument())
598          fragment->parseHTML(markup, contextElement);
599     else {
600         if (!fragment->parseXML(markup, contextElement))
601             // FIXME: We should propagate a syntax error exception out here.
602             return;
603     }
604 
605     insertAdjacent(where, fragment.get(), ec);
606 }
607 
insertAdjacentText(const String & where,const String & text,ExceptionCode & ec)608 void HTMLElement::insertAdjacentText(const String& where, const String& text, ExceptionCode& ec)
609 {
610     RefPtr<Text> textNode = document()->createTextNode(text);
611     insertAdjacent(where, textNode.get(), ec);
612 }
613 
addHTMLAlignment(Attribute * attr)614 void HTMLElement::addHTMLAlignment(Attribute* attr)
615 {
616     addHTMLAlignmentToStyledElement(this, attr);
617 }
618 
addHTMLAlignmentToStyledElement(StyledElement * element,Attribute * attr)619 void HTMLElement::addHTMLAlignmentToStyledElement(StyledElement* element, Attribute* attr)
620 {
621     // Vertical alignment with respect to the current baseline of the text
622     // right or left means floating images.
623     int floatValue = CSSValueInvalid;
624     int verticalAlignValue = CSSValueInvalid;
625 
626     const AtomicString& alignment = attr->value();
627     if (equalIgnoringCase(alignment, "absmiddle"))
628         verticalAlignValue = CSSValueMiddle;
629     else if (equalIgnoringCase(alignment, "absbottom"))
630         verticalAlignValue = CSSValueBottom;
631     else if (equalIgnoringCase(alignment, "left")) {
632         floatValue = CSSValueLeft;
633         verticalAlignValue = CSSValueTop;
634     } else if (equalIgnoringCase(alignment, "right")) {
635         floatValue = CSSValueRight;
636         verticalAlignValue = CSSValueTop;
637     } else if (equalIgnoringCase(alignment, "top"))
638         verticalAlignValue = CSSValueTop;
639     else if (equalIgnoringCase(alignment, "middle"))
640         verticalAlignValue = CSSValueWebkitBaselineMiddle;
641     else if (equalIgnoringCase(alignment, "center"))
642         verticalAlignValue = CSSValueMiddle;
643     else if (equalIgnoringCase(alignment, "bottom"))
644         verticalAlignValue = CSSValueBaseline;
645     else if (equalIgnoringCase(alignment, "texttop"))
646         verticalAlignValue = CSSValueTextTop;
647 
648     if (floatValue != CSSValueInvalid)
649         element->addCSSProperty(attr, CSSPropertyFloat, floatValue);
650 
651     if (verticalAlignValue != CSSValueInvalid)
652         element->addCSSProperty(attr, CSSPropertyVerticalAlign, verticalAlignValue);
653 }
654 
supportsFocus() const655 bool HTMLElement::supportsFocus() const
656 {
657     return Element::supportsFocus() || (rendererIsEditable() && parentNode() && !parentNode()->rendererIsEditable());
658 }
659 
contentEditable() const660 String HTMLElement::contentEditable() const
661 {
662     const AtomicString& value = fastGetAttribute(contenteditableAttr);
663 
664     if (value.isNull())
665         return "inherit";
666     if (value.isEmpty() || equalIgnoringCase(value, "true"))
667         return "true";
668     if (equalIgnoringCase(value, "false"))
669          return "false";
670     if (equalIgnoringCase(value, "plaintext-only"))
671         return "plaintext-only";
672 
673     return "inherit";
674 }
675 
setContentEditable(Attribute * attr)676 void HTMLElement::setContentEditable(Attribute* attr)
677 {
678     const AtomicString& enabled = attr->value();
679     if (enabled.isEmpty() || equalIgnoringCase(enabled, "true")) {
680         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueReadWrite);
681         addCSSProperty(attr, CSSPropertyWordWrap, CSSValueBreakWord);
682         addCSSProperty(attr, CSSPropertyWebkitNbspMode, CSSValueSpace);
683         addCSSProperty(attr, CSSPropertyWebkitLineBreak, CSSValueAfterWhiteSpace);
684     } else if (equalIgnoringCase(enabled, "false")) {
685         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueReadOnly);
686         attr->decl()->removeProperty(CSSPropertyWordWrap, false);
687         attr->decl()->removeProperty(CSSPropertyWebkitNbspMode, false);
688         attr->decl()->removeProperty(CSSPropertyWebkitLineBreak, false);
689     } else if (equalIgnoringCase(enabled, "plaintext-only")) {
690         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueReadWritePlaintextOnly);
691         addCSSProperty(attr, CSSPropertyWordWrap, CSSValueBreakWord);
692         addCSSProperty(attr, CSSPropertyWebkitNbspMode, CSSValueSpace);
693         addCSSProperty(attr, CSSPropertyWebkitLineBreak, CSSValueAfterWhiteSpace);
694     }
695 }
696 
setContentEditable(const String & enabled,ExceptionCode & ec)697 void HTMLElement::setContentEditable(const String& enabled, ExceptionCode& ec)
698 {
699     if (equalIgnoringCase(enabled, "true"))
700         setAttribute(contenteditableAttr, "true", ec);
701     else if (equalIgnoringCase(enabled, "false"))
702         setAttribute(contenteditableAttr, "false", ec);
703     else if (equalIgnoringCase(enabled, "plaintext-only"))
704         setAttribute(contenteditableAttr, "plaintext-only");
705     else if (equalIgnoringCase(enabled, "inherit"))
706         removeAttribute(contenteditableAttr, ec);
707     else
708         ec = SYNTAX_ERR;
709 }
710 
draggable() const711 bool HTMLElement::draggable() const
712 {
713     return equalIgnoringCase(getAttribute(draggableAttr), "true");
714 }
715 
setDraggable(bool value)716 void HTMLElement::setDraggable(bool value)
717 {
718     setAttribute(draggableAttr, value ? "true" : "false");
719 }
720 
spellcheck() const721 bool HTMLElement::spellcheck() const
722 {
723     return isSpellCheckingEnabled();
724 }
725 
setSpellcheck(bool enable)726 void HTMLElement::setSpellcheck(bool enable)
727 {
728     setAttribute(spellcheckAttr, enable ? "true" : "false");
729 }
730 
731 
click()732 void HTMLElement::click()
733 {
734     dispatchSimulatedClick(0, false, false);
735 }
736 
737 // accessKeyAction is used by the accessibility support code
738 // to send events to elements that our JavaScript caller does
739 // does not.  The elements JS is interested in have subclasses
740 // that override this method to direct the click appropriately.
741 // Here in the base class, then, we only send the click if
742 // the caller wants it to go to any HTMLElement, and we say
743 // to send the mouse events in addition to the click.
accessKeyAction(bool sendToAnyElement)744 void HTMLElement::accessKeyAction(bool sendToAnyElement)
745 {
746     if (sendToAnyElement)
747         dispatchSimulatedClick(0, true);
748 }
749 
title() const750 String HTMLElement::title() const
751 {
752     return getAttribute(titleAttr);
753 }
754 
tabIndex() const755 short HTMLElement::tabIndex() const
756 {
757     if (supportsFocus())
758         return Element::tabIndex();
759     return -1;
760 }
761 
setTabIndex(int value)762 void HTMLElement::setTabIndex(int value)
763 {
764     setAttribute(tabindexAttr, String::number(value));
765 }
766 
children()767 PassRefPtr<HTMLCollection> HTMLElement::children()
768 {
769     return HTMLCollection::create(this, NodeChildren);
770 }
771 
rendererIsNeeded(RenderStyle * style)772 bool HTMLElement::rendererIsNeeded(RenderStyle *style)
773 {
774     if (hasLocalName(noscriptTag)) {
775         Frame* frame = document()->frame();
776 #if ENABLE(XHTMLMP)
777         if (!document()->shouldProcessNoscriptElement())
778             return false;
779 #else
780         if (frame && frame->script()->canExecuteScripts(NotAboutToExecuteScript))
781             return false;
782 #endif
783     } else if (hasLocalName(noembedTag)) {
784         Frame* frame = document()->frame();
785         if (frame && frame->loader()->subframeLoader()->allowPlugins(NotAboutToInstantiatePlugin))
786             return false;
787     }
788     return StyledElement::rendererIsNeeded(style);
789 }
790 
createRenderer(RenderArena * arena,RenderStyle * style)791 RenderObject* HTMLElement::createRenderer(RenderArena* arena, RenderStyle* style)
792 {
793     if (hasLocalName(wbrTag))
794         return new (arena) RenderWordBreak(this);
795     return RenderObject::createObject(this, style);
796 }
797 
findFormAncestor() const798 HTMLFormElement* HTMLElement::findFormAncestor() const
799 {
800     for (ContainerNode* ancestor = parentNode(); ancestor; ancestor = ancestor->parentNode()) {
801         if (ancestor->hasTagName(formTag))
802             return static_cast<HTMLFormElement*>(ancestor);
803     }
804     return 0;
805 }
806 
virtualForm() const807 HTMLFormElement* HTMLElement::virtualForm() const
808 {
809     return findFormAncestor();
810 }
811 
setHasDirAutoFlagRecursively(Node * firstNode,bool flag,Node * lastNode=0)812 static void setHasDirAutoFlagRecursively(Node* firstNode, bool flag, Node* lastNode = 0)
813 {
814     firstNode->setSelfOrAncestorHasDirAutoAttribute(flag);
815 
816     Node* node = firstNode->firstChild();
817 
818     while (node) {
819         if (node->selfOrAncestorHasDirAutoAttribute() == flag)
820             return;
821 
822         if (node->isHTMLElement() && toElement(node)->hasAttribute(dirAttr)) {
823             if (node == lastNode)
824                 return;
825             node = node->traverseNextSibling(firstNode);
826             continue;
827         }
828         node->setSelfOrAncestorHasDirAutoAttribute(flag);
829         if (node == lastNode)
830             return;
831         node = node->traverseNextNode(firstNode);
832     }
833 }
834 
childrenChanged(bool changedByParser,Node * beforeChange,Node * afterChange,int childCountDelta)835 void HTMLElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
836 {
837     StyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
838     adjustDirectionalityIfNeededAfterChildrenChanged(beforeChange, childCountDelta);
839 }
840 
directionalityIfhasDirAutoAttribute(bool & isAuto) const841 TextDirection HTMLElement::directionalityIfhasDirAutoAttribute(bool& isAuto) const
842 {
843     if (!(selfOrAncestorHasDirAutoAttribute() && equalIgnoringCase(getAttribute(dirAttr), "auto"))) {
844         isAuto = false;
845         return LTR;
846     }
847 
848     isAuto = true;
849     return directionality();
850 }
851 
directionality(Node ** strongDirectionalityTextNode) const852 TextDirection HTMLElement::directionality(Node** strongDirectionalityTextNode) const
853 {
854     Node* node = firstChild();
855     while (node) {
856         // Skip bdi, script and style elements
857         if (equalIgnoringCase(node->nodeName(), "bdi") || node->hasTagName(scriptTag) || node->hasTagName(styleTag)) {
858             node = node->traverseNextSibling(this);
859             continue;
860         }
861 
862         // Skip elements with valid dir attribute
863         if (node->isElementNode()) {
864             AtomicString dirAttributeValue = toElement(node)->fastGetAttribute(dirAttr);
865             if (equalIgnoringCase(dirAttributeValue, "rtl") || equalIgnoringCase(dirAttributeValue, "ltr") || equalIgnoringCase(dirAttributeValue, "auto")) {
866                 node = node->traverseNextSibling(this);
867                 continue;
868             }
869         }
870 
871         if (node->isTextNode()) {
872             bool hasStrongDirectionality;
873             WTF::Unicode::Direction textDirection = node->textContent(true).defaultWritingDirection(&hasStrongDirectionality);
874             if (hasStrongDirectionality) {
875                 if (strongDirectionalityTextNode)
876                     *strongDirectionalityTextNode = node;
877                 return (textDirection == WTF::Unicode::LeftToRight) ? LTR : RTL;
878             }
879         }
880         node = node->traverseNextNode(this);
881     }
882     if (strongDirectionalityTextNode)
883         *strongDirectionalityTextNode = 0;
884     return LTR;
885 }
886 
dirAttributeChanged(Attribute * attribute)887 void HTMLElement::dirAttributeChanged(Attribute* attribute)
888 {
889     Element* parent = parentElement();
890 
891     if (parent && parent->isHTMLElement() && parent->selfOrAncestorHasDirAutoAttribute())
892         toHTMLElement(parent)->adjustDirectionalityIfNeededAfterChildAttributeChanged(this);
893 
894     if (equalIgnoringCase(attribute->value(), "auto"))
895         calculateAndAdjustDirectionality();
896 }
897 
adjustDirectionalityIfNeededAfterChildAttributeChanged(Element * child)898 void HTMLElement::adjustDirectionalityIfNeededAfterChildAttributeChanged(Element* child)
899 {
900     ASSERT(selfOrAncestorHasDirAutoAttribute());
901     Node* strongDirectionalityTextNode;
902     TextDirection textDirection = directionality(&strongDirectionalityTextNode);
903     setHasDirAutoFlagRecursively(child, false);
904     if (renderer() && renderer()->style() && renderer()->style()->direction() != textDirection) {
905         Element* elementToAdjust = this;
906         for (; elementToAdjust; elementToAdjust = elementToAdjust->parentElement()) {
907             if (elementToAdjust->hasAttribute(dirAttr)) {
908                 elementToAdjust->setNeedsStyleRecalc();
909                 return;
910             }
911         }
912     }
913 }
914 
calculateAndAdjustDirectionality()915 void HTMLElement::calculateAndAdjustDirectionality()
916 {
917     Node* strongDirectionalityTextNode;
918     TextDirection textDirection = directionality(&strongDirectionalityTextNode);
919     setHasDirAutoFlagRecursively(this, true, strongDirectionalityTextNode);
920     if (renderer() && renderer()->style() && renderer()->style()->direction() != textDirection)
921         setNeedsStyleRecalc();
922 }
923 
adjustDirectionalityIfNeededAfterChildrenChanged(Node * beforeChange,int childCountDelta)924 void HTMLElement::adjustDirectionalityIfNeededAfterChildrenChanged(Node* beforeChange, int childCountDelta)
925 {
926     if ((!document() || document()->renderer()) && childCountDelta < 0) {
927         Node* node = beforeChange ? beforeChange->traverseNextSibling() : 0;
928         for (int counter = 0; node && counter < childCountDelta; counter++, node = node->traverseNextSibling()) {
929             if (node->isElementNode() && toElement(node)->hasAttribute(dirAttr))
930                 continue;
931 
932             setHasDirAutoFlagRecursively(node, false);
933         }
934     }
935 
936     if (!selfOrAncestorHasDirAutoAttribute())
937         return;
938 
939     Node* oldMarkedNode = beforeChange ? beforeChange->traverseNextSibling() : 0;
940     while (oldMarkedNode && oldMarkedNode->isHTMLElement() && toHTMLElement(oldMarkedNode)->hasAttribute(dirAttr))
941         oldMarkedNode = oldMarkedNode->traverseNextSibling(this);
942     if (oldMarkedNode)
943         setHasDirAutoFlagRecursively(oldMarkedNode, false);
944 
945     for (Element* elementToAdjust = this; elementToAdjust; elementToAdjust = elementToAdjust->parentElement()) {
946         if (elementToAdjust->isHTMLElement() && elementToAdjust->hasAttribute(dirAttr)) {
947             toHTMLElement(elementToAdjust)->calculateAndAdjustDirectionality();
948             return;
949         }
950     }
951 }
952 
953 } // namespace WebCore
954 
955 #ifndef NDEBUG
956 
957 // For use in the debugger
958 void dumpInnerHTML(WebCore::HTMLElement*);
959 
dumpInnerHTML(WebCore::HTMLElement * element)960 void dumpInnerHTML(WebCore::HTMLElement* element)
961 {
962     printf("%s\n", element->innerHTML().ascii().data());
963 }
964 #endif
965