WebCore/html/HTMLElement.cpp

   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 "CSSPropertyNames.h"
  28 #include "CSSValueKeywords.h"
  29 #include "DocumentFragment.h"
  30 #include "Event.h"
  31 #include "EventListener.h"
  32 #include "EventNames.h"
  33 #include "ExceptionCode.h"
  34 #include "Frame.h"
  35 #include "HTMLBRElement.h"
  36 #include "HTMLCollection.h"
  37 #include "HTMLDocument.h"
  38 #include "HTMLElementFactory.h"
  39 #include "HTMLFormElement.h"
  40 #include "HTMLNames.h"
  41 #include "HTMLTokenizer.h"
  42 #include "MappedAttribute.h"
  43 #include "RenderWordBreak.h"
  44 #include "ScriptEventListener.h"
  45 #include "Settings.h"
  46 #include "Text.h"
  47 #include "TextIterator.h"
  48 #include "XMLTokenizer.h"
  49 #include "markup.h"
  50 #include <wtf/StdLibExtras.h>
  51
  52 namespace WebCore {
  53
  54 using namespace HTMLNames;
  55
  56 using std::min;
  57 using std::max;
  58
  59 PassRefPtr<HTMLElement> HTMLElement::create(const QualifiedName& tagName, Document* document)
  60 {
  61     return adoptRef(new HTMLElement(tagName, document, CreateElement));
  62 }
  63
  64 String HTMLElement::nodeName() const
  65 {
  66     // FIXME: Would be nice to have an atomicstring lookup based off uppercase chars that does not have to copy
  67     // 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
  74 HTMLTagStatus HTMLElement::endTagRequirement() const
  75 {
  76     if (hasLocalName(wbrTag))
  77         return TagStatusForbidden;
  78     if (hasLocalName(dtTag) || hasLocalName(ddTag) || hasLocalName(rpTag) || hasLocalName(rtTag))
  79         return TagStatusOptional;
  80
  81     // Same values as <span>.  This way custom tag name elements will behave like inline spans.
  82     return TagStatusRequired;
  83 }
  84
  85 int HTMLElement::tagPriority() const
  86 {
  87     if (hasLocalName(wbrTag))
  88         return 0;
  89     if (hasLocalName(addressTag) || hasLocalName(ddTag) || hasLocalName(dtTag) || hasLocalName(noscriptTag) || hasLocalName(rpTag) || hasLocalName(rtTag))
  90         return 3;
  91     if (hasLocalName(centerTag) || hasLocalName(nobrTag) || hasLocalName(rubyTag) || hasLocalName(navTag))
  92         return 5;
  93     if (hasLocalName(noembedTag) || hasLocalName(noframesTag))
  94         return 10;
  95
  96     // Same values as <span>.  This way custom tag name elements will behave like inline spans.
  97     return 1;
  98 }
  99
 100 bool HTMLElement::mapToEntry(const QualifiedName& attrName, MappedAttributeEntry& result) const
 101 {
 102     if (attrName == alignAttr ||
 103         attrName == contenteditableAttr) {
 104         result = eUniversal;
 105         return false;
 106     }
 107     if (attrName == dirAttr) {
 108         result = hasLocalName(bdoTag) ? eBDO : eUniversal;
 109         return false;
 110     }
 111
 112     return StyledElement::mapToEntry(attrName, result);
 113 }
 114
 115 void HTMLElement::parseMappedAttribute(MappedAttribute *attr)
 116 {
 117     if (attr->name() == idAttr || attr->name() == classAttr || attr->name() == styleAttr)
 118         return StyledElement::parseMappedAttribute(attr);
 119
 120     String indexstring;
 121     if (attr->name() == alignAttr) {
 122         if (equalIgnoringCase(attr->value(), "middle"))
 123             addCSSProperty(attr, CSSPropertyTextAlign, "center");
 124         else
 125             addCSSProperty(attr, CSSPropertyTextAlign, attr->value());
 126     } else if (attr->name() == contenteditableAttr) {
 127         setContentEditable(attr);
 128     } else if (attr->name() == tabindexAttr) {
 129         indexstring = getAttribute(tabindexAttr);
 130         if (indexstring.length()) {
 131             bool parsedOK;
 132             int tabindex = indexstring.toIntStrict(&parsedOK);
 133             if (parsedOK)
 134                 // Clamp tabindex to the range of 'short' to match Firefox's behavior.
 135                 setTabIndexExplicitly(max(static_cast<int>(std::numeric_limits<short>::min()), min(tabindex, static_cast<int>(std::numeric_limits<short>::max()))));
 136         }
 137     } else if (attr->name() == langAttr) {
 138         // FIXME: Implement
 139     } else if (attr->name() == dirAttr) {
 140         addCSSProperty(attr, CSSPropertyDirection, attr->value());
 141         addCSSProperty(attr, CSSPropertyUnicodeBidi, hasLocalName(bdoTag) ? CSSValueBidiOverride : CSSValueEmbed);
 142     } else if (attr->name() == draggableAttr) {
 143         const AtomicString& value = attr->value();
 144         if (equalIgnoringCase(value, "true")) {
 145             addCSSProperty(attr, CSSPropertyWebkitUserDrag, CSSValueElement);
 146             addCSSProperty(attr, CSSPropertyWebkitUserSelect, CSSValueNone);
 147         } else if (equalIgnoringCase(value, "false"))
 148             addCSSProperty(attr, CSSPropertyWebkitUserDrag, CSSValueNone);
 149     }
 150 // standard events
 151     else if (attr->name() == onclickAttr) {
 152         setAttributeEventListener(eventNames().clickEvent, createAttributeEventListener(this, attr));
 153     } else if (attr->name() == oncontextmenuAttr) {
 154         setAttributeEventListener(eventNames().contextmenuEvent, createAttributeEventListener(this, attr));
 155     } else if (attr->name() == ondblclickAttr) {
 156         setAttributeEventListener(eventNames().dblclickEvent, createAttributeEventListener(this, attr));
 157     } else if (attr->name() == onmousedownAttr) {
 158         setAttributeEventListener(eventNames().mousedownEvent, createAttributeEventListener(this, attr));
 159     } else if (attr->name() == onmousemoveAttr) {
 160         setAttributeEventListener(eventNames().mousemoveEvent, createAttributeEventListener(this, attr));
 161     } else if (attr->name() == onmouseoutAttr) {
 162         setAttributeEventListener(eventNames().mouseoutEvent, createAttributeEventListener(this, attr));
 163     } else if (attr->name() == onmouseoverAttr) {
 164         setAttributeEventListener(eventNames().mouseoverEvent, createAttributeEventListener(this, attr));
 165     } else if (attr->name() == onmouseupAttr) {
 166         setAttributeEventListener(eventNames().mouseupEvent, createAttributeEventListener(this, attr));
 167     } else if (attr->name() == onmousewheelAttr) {
 168         setAttributeEventListener(eventNames().mousewheelEvent, createAttributeEventListener(this, attr));
 169     } else if (attr->name() == onfocusAttr) {
 170         setAttributeEventListener(eventNames().focusEvent, createAttributeEventListener(this, attr));
 171     } else if (attr->name() == onblurAttr) {
 172         setAttributeEventListener(eventNames().blurEvent, createAttributeEventListener(this, attr));
 173     } else if (attr->name() == onkeydownAttr) {
 174         setAttributeEventListener(eventNames().keydownEvent, createAttributeEventListener(this, attr));
 175     } else if (attr->name() == onkeypressAttr) {
 176         setAttributeEventListener(eventNames().keypressEvent, createAttributeEventListener(this, attr));
 177     } else if (attr->name() == onkeyupAttr) {
 178         setAttributeEventListener(eventNames().keyupEvent, createAttributeEventListener(this, attr));
 179     } else if (attr->name() == onscrollAttr) {
 180         setAttributeEventListener(eventNames().scrollEvent, createAttributeEventListener(this, attr));
 181     } else if (attr->name() == onbeforecutAttr) {
 182         setAttributeEventListener(eventNames().beforecutEvent, createAttributeEventListener(this, attr));
 183     } else if (attr->name() == oncutAttr) {
 184         setAttributeEventListener(eventNames().cutEvent, createAttributeEventListener(this, attr));
 185     } else if (attr->name() == onbeforecopyAttr) {
 186         setAttributeEventListener(eventNames().beforecopyEvent, createAttributeEventListener(this, attr));
 187     } else if (attr->name() == oncopyAttr) {
 188         setAttributeEventListener(eventNames().copyEvent, createAttributeEventListener(this, attr));
 189     } else if (attr->name() == onbeforepasteAttr) {
 190         setAttributeEventListener(eventNames().beforepasteEvent, createAttributeEventListener(this, attr));
 191     } else if (attr->name() == onpasteAttr) {
 192         setAttributeEventListener(eventNames().pasteEvent, createAttributeEventListener(this, attr));
 193     } else if (attr->name() == ondragenterAttr) {
 194         setAttributeEventListener(eventNames().dragenterEvent, createAttributeEventListener(this, attr));
 195     } else if (attr->name() == ondragoverAttr) {
 196         setAttributeEventListener(eventNames().dragoverEvent, createAttributeEventListener(this, attr));
 197     } else if (attr->name() == ondragleaveAttr) {
 198         setAttributeEventListener(eventNames().dragleaveEvent, createAttributeEventListener(this, attr));
 199     } else if (attr->name() == ondropAttr) {
 200         setAttributeEventListener(eventNames().dropEvent, createAttributeEventListener(this, attr));
 201     } else if (attr->name() == ondragstartAttr) {
 202         setAttributeEventListener(eventNames().dragstartEvent, createAttributeEventListener(this, attr));
 203     } else if (attr->name() == ondragAttr) {
 204         setAttributeEventListener(eventNames().dragEvent, createAttributeEventListener(this, attr));
 205     } else if (attr->name() == ondragendAttr) {
 206         setAttributeEventListener(eventNames().dragendEvent, createAttributeEventListener(this, attr));
 207     } else if (attr->name() == onselectstartAttr) {
 208         setAttributeEventListener(eventNames().selectstartEvent, createAttributeEventListener(this, attr));
 209     } else if (attr->name() == onsubmitAttr) {
 210         setAttributeEventListener(eventNames().submitEvent, createAttributeEventListener(this, attr));
 211     } else if (attr->name() == onerrorAttr) {
 212         setAttributeEventListener(eventNames().errorEvent, createAttributeEventListener(this, attr));
 213     } else if (attr->name() == onwebkitanimationstartAttr) {
 214         setAttributeEventListener(eventNames().webkitAnimationStartEvent, createAttributeEventListener(this, attr));
 215     } else if (attr->name() == onwebkitanimationiterationAttr) {
 216         setAttributeEventListener(eventNames().webkitAnimationIterationEvent, createAttributeEventListener(this, attr));
 217     } else if (attr->name() == onwebkitanimationendAttr) {
 218         setAttributeEventListener(eventNames().webkitAnimationEndEvent, createAttributeEventListener(this, attr));
 219     } else if (attr->name() == onwebkittransitionendAttr) {
 220         setAttributeEventListener(eventNames().webkitTransitionEndEvent, createAttributeEventListener(this, attr));
 221     } else if (attr->name() == oninputAttr) {
 222         setAttributeEventListener(eventNames().inputEvent, createAttributeEventListener(this, attr));
 223     } else if (attr->name() == oninvalidAttr) {
 224         setAttributeEventListener(eventNames().invalidEvent, createAttributeEventListener(this, attr));
 225     } else if (attr->name() == ontouchstartAttr) {
 226         setAttributeEventListener(eventNames().touchstartEvent, createAttributeEventListener(this, attr));
 227     } else if (attr->name() == ontouchmoveAttr) {
 228         setAttributeEventListener(eventNames().touchmoveEvent, createAttributeEventListener(this, attr));
 229     } else if (attr->name() == ontouchendAttr) {
 230         setAttributeEventListener(eventNames().touchendEvent, createAttributeEventListener(this, attr));
 231     }
 232 }
 233
 234 String HTMLElement::innerHTML() const
 235 {
 236     return createMarkup(this, ChildrenOnly);
 237 }
 238
 239 String HTMLElement::outerHTML() const
 240 {
 241     return createMarkup(this);
 242 }
 243
 244 PassRefPtr<DocumentFragment> HTMLElement::createContextualFragment(const String &html)
 245 {
 246     // the following is in accordance with the definition as used by IE
 247     if (endTagRequirement() == TagStatusForbidden)
 248         return 0;
 249
 250     if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) ||
 251         hasLocalName(headTag) || hasLocalName(styleTag) || hasLocalName(titleTag))
 252         return 0;
 253
 254     RefPtr<DocumentFragment> fragment = DocumentFragment::create(document());
 255
 256     if (document()->isHTMLDocument())
 257          parseHTMLDocumentFragment(html, fragment.get());
 258     else {
 259         if (!parseXMLDocumentFragment(html, fragment.get(), this))
 260             // FIXME: We should propagate a syntax error exception out here.
 261             return 0;
 262     }
 263
 264     // Exceptions are ignored because none ought to happen here.
 265     int ignoredExceptionCode;
 266
 267     // we need to pop <html> and <body> elements and remove <head> to
 268     // accommodate folks passing complete HTML documents to make the
 269     // child of an element.
 270
 271     RefPtr<Node> nextNode;
 272     for (RefPtr<Node> node = fragment->firstChild(); node; node = nextNode) {
 273         nextNode = node->nextSibling();
 274         if (node->hasTagName(htmlTag) || node->hasTagName(bodyTag)) {
 275             Node *firstChild = node->firstChild();
 276             if (firstChild)
 277                 nextNode = firstChild;
 278             RefPtr<Node> nextChild;
 279             for (RefPtr<Node> child = firstChild; child; child = nextChild) {
 280                 nextChild = child->nextSibling();
 281                 node->removeChild(child.get(), ignoredExceptionCode);
 282                 ASSERT(!ignoredExceptionCode);
 283                 fragment->insertBefore(child, node.get(), ignoredExceptionCode);
 284                 ASSERT(!ignoredExceptionCode);
 285             }
 286             fragment->removeChild(node.get(), ignoredExceptionCode);
 287             ASSERT(!ignoredExceptionCode);
 288         } else if (node->hasTagName(headTag)) {
 289             fragment->removeChild(node.get(), ignoredExceptionCode);
 290             ASSERT(!ignoredExceptionCode);
 291         }
 292     }
 293
 294     return fragment.release();
 295 }
 296
 297 static inline bool hasOneChild(ContainerNode* node)
 298 {
 299     Node* firstChild = node->firstChild();
 300     return firstChild && !firstChild->nextSibling();
 301 }
 302
 303 static inline bool hasOneTextChild(ContainerNode* node)
 304 {
 305     return hasOneChild(node) && node->firstChild()->isTextNode();
 306 }
 307
 308 static void replaceChildrenWithFragment(HTMLElement* element, PassRefPtr<DocumentFragment> fragment, ExceptionCode& ec)
 309 {
 310     if (!fragment->firstChild()) {
 311         element->removeChildren();
 312         return;
 313     }
 314
 315     if (hasOneTextChild(element) && hasOneTextChild(fragment.get())) {
 316         static_cast<Text*>(element->firstChild())->setData(static_cast<Text*>(fragment->firstChild())->data(), ec);
 317         return;
 318     }
 319
 320     if (hasOneChild(element)) {
 321         element->replaceChild(fragment, element->firstChild(), ec);
 322         return;
 323     }
 324
 325     element->removeChildren();
 326     element->appendChild(fragment, ec);
 327 }
 328
 329 static void replaceChildrenWithText(HTMLElement* element, const String& text, ExceptionCode& ec)
 330 {
 331     if (hasOneTextChild(element)) {
 332         static_cast<Text*>(element->firstChild())->setData(text, ec);
 333         return;
 334     }
 335
 336     RefPtr<Text> textNode = Text::create(element->document(), text);
 337
 338     if (hasOneChild(element)) {
 339         element->replaceChild(textNode.release(), element->firstChild(), ec);
 340         return;
 341     }
 342
 343     element->removeChildren();
 344     element->appendChild(textNode.release(), ec);
 345 }
 346
 347 void HTMLElement::setInnerHTML(const String& html, ExceptionCode& ec)
 348 {
 349     RefPtr<DocumentFragment> fragment = createContextualFragment(html);
 350     if (!fragment) {
 351         ec = NO_MODIFICATION_ALLOWED_ERR;
 352         return;
 353     }
 354
 355     replaceChildrenWithFragment(this, fragment.release(), ec);
 356 }
 357
 358 void HTMLElement::setOuterHTML(const String& html, ExceptionCode& ec)
 359 {
 360     Node* p = parent();
 361     if (!p || !p->isHTMLElement()) {
 362         ec = NO_MODIFICATION_ALLOWED_ERR;
 363         return;
 364     }
 365
 366     HTMLElement* parent = static_cast<HTMLElement*>(p);
 367     RefPtr<DocumentFragment> fragment = parent->createContextualFragment(html);
 368     if (!fragment) {
 369         ec = NO_MODIFICATION_ALLOWED_ERR;
 370         return;
 371     }
 372
 373     // FIXME: Why doesn't this have code to merge neighboring text nodes the way setOuterText does?
 374
 375     parent->replaceChild(fragment.release(), this, ec);
 376 }
 377
 378 void HTMLElement::setInnerText(const String& text, ExceptionCode& ec)
 379 {
 380     // follow the IE specs about when this is allowed
 381     if (endTagRequirement() == TagStatusForbidden) {
 382         ec = NO_MODIFICATION_ALLOWED_ERR;
 383         return;
 384     }
 385     if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) ||
 386         hasLocalName(headTag) || hasLocalName(htmlTag) || hasLocalName(tableTag) ||
 387         hasLocalName(tbodyTag) || hasLocalName(tfootTag) || hasLocalName(theadTag) ||
 388         hasLocalName(trTag)) {
 389         ec = NO_MODIFICATION_ALLOWED_ERR;
 390         return;
 391     }
 392
 393     // FIXME: This doesn't take whitespace collapsing into account at all.
 394
 395     if (!text.contains('\n') && !text.contains('\r')) {
 396         if (text.isEmpty()) {
 397             removeChildren();
 398             return;
 399         }
 400         replaceChildrenWithText(this, text, ec);
 401         return;
 402     }
 403
 404     // FIXME: Do we need to be able to detect preserveNewline style even when there's no renderer?
 405     // FIXME: Can the renderer be out of date here? Do we need to call updateStyleIfNeeded?
 406     // For example, for the contents of textarea elements that are display:none?
 407     RenderObject* r = renderer();
 408     if (r && r->style()->preserveNewline()) {
 409         if (!text.contains('\r')) {
 410             replaceChildrenWithText(this, text, ec);
 411             return;
 412         }
 413         String textWithConsistentLineBreaks = text;
 414         textWithConsistentLineBreaks.replace("\r\n", "\n");
 415         textWithConsistentLineBreaks.replace('\r', '\n');
 416         replaceChildrenWithText(this, textWithConsistentLineBreaks, ec);
 417         return;
 418     }
 419
 420     // Add text nodes and <br> elements.
 421     ec = 0;
 422     RefPtr<DocumentFragment> fragment = DocumentFragment::create(document());
 423     int lineStart = 0;
 424     UChar prev = 0;
 425     int length = text.length();
 426     for (int i = 0; i < length; ++i) {
 427         UChar c = text[i];
 428         if (c == '\n' || c == '\r') {
 429             if (i > lineStart) {
 430                 fragment->appendChild(Text::create(document(), text.substring(lineStart, i - lineStart)), ec);
 431                 if (ec)
 432                     return;
 433             }
 434             if (!(c == '\n' && i != 0 && prev == '\r')) {
 435                 fragment->appendChild(new HTMLBRElement(brTag, document()), ec);
 436                 if (ec)
 437                     return;
 438             }
 439             lineStart = i + 1;
 440         }
 441         prev = c;
 442     }
 443     if (length > lineStart)
 444         fragment->appendChild(Text::create(document(), text.substring(lineStart, length - lineStart)), ec);
 445     replaceChildrenWithFragment(this, fragment.release(), ec);
 446 }
 447
 448 void HTMLElement::setOuterText(const String &text, ExceptionCode& ec)
 449 {
 450     // follow the IE specs about when this is allowed
 451     if (endTagRequirement() == TagStatusForbidden) {
 452         ec = NO_MODIFICATION_ALLOWED_ERR;
 453         return;
 454     }
 455     if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) ||
 456         hasLocalName(headTag) || hasLocalName(htmlTag) || hasLocalName(tableTag) ||
 457         hasLocalName(tbodyTag) || hasLocalName(tfootTag) || hasLocalName(theadTag) ||
 458         hasLocalName(trTag)) {
 459         ec = NO_MODIFICATION_ALLOWED_ERR;
 460         return;
 461     }
 462
 463     Node* parent = parentNode();
 464     if (!parent) {
 465         ec = NO_MODIFICATION_ALLOWED_ERR;
 466         return;
 467     }
 468
 469     // FIXME: This creates a new text node even when the text is empty.
 470     // FIXME: This creates a single text node even when the text has CR and LF
 471     // characters in it. Instead it should create <br> elements.
 472     RefPtr<Text> t = Text::create(document(), text);
 473     ec = 0;
 474     parent->replaceChild(t, this, ec);
 475     if (ec)
 476         return;
 477
 478     // is previous node a text node? if so, merge into it
 479     Node* prev = t->previousSibling();
 480     if (prev && prev->isTextNode()) {
 481         Text* textPrev = static_cast<Text*>(prev);
 482         textPrev->appendData(t->data(), ec);
 483         if (ec)
 484             return;
 485         t->remove(ec);
 486         if (ec)
 487             return;
 488         t = textPrev;
 489     }
 490
 491     // is next node a text node? if so, merge it in
 492     Node* next = t->nextSibling();
 493     if (next && next->isTextNode()) {
 494         Text* textNext = static_cast<Text*>(next);
 495         t->appendData(textNext->data(), ec);
 496         if (ec)
 497             return;
 498         textNext->remove(ec);
 499         if (ec)
 500             return;
 501     }
 502 }
 503
 504 Node* HTMLElement::insertAdjacent(const String& where, Node* newChild, ExceptionCode& ec)
 505 {
 506     // In Internet Explorer if the element has no parent and where is "beforeBegin" or "afterEnd",
 507     // a document fragment is created and the elements appended in the correct order. This document
 508     // fragment isn't returned anywhere.
 509     //
 510     // This is impossible for us to implement as the DOM tree does not allow for such structures,
 511     // Opera also appears to disallow such usage.
 512
 513     if (equalIgnoringCase(where, "beforeBegin")) {
 514         if (Node* p = parent())
 515             return p->insertBefore(newChild, this, ec) ? newChild : 0;
 516         return 0;
 517     }
 518
 519     if (equalIgnoringCase(where, "afterBegin"))
 520         return insertBefore(newChild, firstChild(), ec) ? newChild : 0;
 521
 522     if (equalIgnoringCase(where, "beforeEnd"))
 523         return appendChild(newChild, ec) ? newChild : 0;
 524
 525     if (equalIgnoringCase(where, "afterEnd")) {
 526         if (Node* p = parent())
 527             return p->insertBefore(newChild, nextSibling(), ec) ? newChild : 0;
 528         return 0;
 529     }
 530
 531     // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative
 532     ec = NOT_SUPPORTED_ERR;
 533     return 0;
 534 }
 535
 536 Element* HTMLElement::insertAdjacentElement(const String& where, Element* newChild, ExceptionCode& ec)
 537 {
 538     if (!newChild) {
 539         // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative
 540         ec = TYPE_MISMATCH_ERR;
 541         return 0;
 542     }
 543
 544     Node* returnValue = insertAdjacent(where, newChild, ec);
 545     ASSERT(!returnValue || returnValue->isElementNode());
 546     return static_cast<Element*>(returnValue);
 547 }
 548
 549 void HTMLElement::insertAdjacentHTML(const String& where, const String& html, ExceptionCode& ec)
 550 {
 551     RefPtr<DocumentFragment> fragment = document()->createDocumentFragment();
 552     if (document()->isHTMLDocument())
 553          parseHTMLDocumentFragment(html, fragment.get());
 554     else {
 555         if (!parseXMLDocumentFragment(html, fragment.get(), this))
 556             // FIXME: We should propagate a syntax error exception out here.
 557             return;
 558     }
 559
 560     insertAdjacent(where, fragment.get(), ec);
 561 }
 562
 563 void HTMLElement::insertAdjacentText(const String& where, const String& text, ExceptionCode& ec)
 564 {
 565     RefPtr<Text> textNode = document()->createTextNode(text);
 566     insertAdjacent(where, textNode.get(), ec);
 567 }
 568
 569 void HTMLElement::addHTMLAlignment(MappedAttribute* attr)
 570 {
 571     addHTMLAlignmentToStyledElement(this, attr);
 572 }
 573
 574 void HTMLElement::addHTMLAlignmentToStyledElement(StyledElement* element, MappedAttribute* attr)
 575 {
 576     // vertical alignment with respect to the current baseline of the text
 577     // right or left means floating images
 578     int floatValue = CSSValueInvalid;
 579     int verticalAlignValue = CSSValueInvalid;
 580
 581     const AtomicString& alignment = attr->value();
 582     if (equalIgnoringCase(alignment, "absmiddle"))
 583         verticalAlignValue = CSSValueMiddle;
 584     else if (equalIgnoringCase(alignment, "absbottom"))
 585         verticalAlignValue = CSSValueBottom;
 586     else if (equalIgnoringCase(alignment, "left")) {
 587         floatValue = CSSValueLeft;
 588         verticalAlignValue = CSSValueTop;
 589     } else if (equalIgnoringCase(alignment, "right")) {
 590         floatValue = CSSValueRight;
 591         verticalAlignValue = CSSValueTop;
 592     } else if (equalIgnoringCase(alignment, "top"))
 593         verticalAlignValue = CSSValueTop;
 594     else if (equalIgnoringCase(alignment, "middle"))
 595         verticalAlignValue = CSSValueWebkitBaselineMiddle;
 596     else if (equalIgnoringCase(alignment, "center"))
 597         verticalAlignValue = CSSValueMiddle;
 598     else if (equalIgnoringCase(alignment, "bottom"))
 599         verticalAlignValue = CSSValueBaseline;
 600     else if (equalIgnoringCase(alignment, "texttop"))
 601         verticalAlignValue = CSSValueTextTop;
 602
 603     if (floatValue != CSSValueInvalid)
 604         element->addCSSProperty(attr, CSSPropertyFloat, floatValue);
 605
 606     if (verticalAlignValue != CSSValueInvalid)
 607         element->addCSSProperty(attr, CSSPropertyVerticalAlign, verticalAlignValue);
 608 }
 609
 610 bool HTMLElement::supportsFocus() const
 611 {
 612     return Element::supportsFocus() || (isContentEditable() && parent() && !parent()->isContentEditable());
 613 }
 614
 615 bool HTMLElement::isContentEditable() const
 616 {
 617     if (document()->frame() && document()->frame()->isContentEditable())
 618         return true;
 619
 620     // FIXME: this is a terrible thing to do here:
 621     // https://bugs.webkit.org/show_bug.cgi?id=21834
 622     document()->updateStyleIfNeeded();
 623
 624     if (!renderer()) {
 625         if (parentNode())
 626             return parentNode()->isContentEditable();
 627         else
 628             return false;
 629     }
 630
 631     return renderer()->style()->userModify() == READ_WRITE || renderer()->style()->userModify() == READ_WRITE_PLAINTEXT_ONLY;
 632 }
 633
 634 bool HTMLElement::isContentRichlyEditable() const
 635 {
 636     if (document()->frame() && document()->frame()->isContentEditable())
 637         return true;
 638
 639     document()->updateStyleIfNeeded();
 640
 641     if (!renderer()) {
 642         if (parentNode())
 643             return parentNode()->isContentEditable();
 644         else
 645             return false;
 646     }
 647
 648     return renderer()->style()->userModify() == READ_WRITE;
 649 }
 650
 651 String HTMLElement::contentEditable() const
 652 {
 653     document()->updateStyleIfNeeded();
 654
 655     if (!renderer())
 656         return "false";
 657
 658     switch (renderer()->style()->userModify()) {
 659         case READ_WRITE:
 660             return "true";
 661         case READ_ONLY:
 662             return "false";
 663         case READ_WRITE_PLAINTEXT_ONLY:
 664             return "plaintext-only";
 665         default:
 666             return "inherit";
 667     }
 668 }
 669
 670 void HTMLElement::setContentEditable(MappedAttribute* attr)
 671 {
 672     const AtomicString& enabled = attr->value();
 673     if (enabled.isEmpty() || equalIgnoringCase(enabled, "true")) {
 674         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueReadWrite);
 675         addCSSProperty(attr, CSSPropertyWordWrap, CSSValueBreakWord);
 676         addCSSProperty(attr, CSSPropertyWebkitNbspMode, CSSValueSpace);
 677         addCSSProperty(attr, CSSPropertyWebkitLineBreak, CSSValueAfterWhiteSpace);
 678     } else if (equalIgnoringCase(enabled, "false")) {
 679         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueReadOnly);
 680         attr->decl()->removeProperty(CSSPropertyWordWrap, false);
 681         attr->decl()->removeProperty(CSSPropertyWebkitNbspMode, false);
 682         attr->decl()->removeProperty(CSSPropertyWebkitLineBreak, false);
 683     } else if (equalIgnoringCase(enabled, "inherit")) {
 684         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueInherit);
 685         attr->decl()->removeProperty(CSSPropertyWordWrap, false);
 686         attr->decl()->removeProperty(CSSPropertyWebkitNbspMode, false);
 687         attr->decl()->removeProperty(CSSPropertyWebkitLineBreak, false);
 688     } else if (equalIgnoringCase(enabled, "plaintext-only")) {
 689         addCSSProperty(attr, CSSPropertyWebkitUserModify, CSSValueReadWritePlaintextOnly);
 690         addCSSProperty(attr, CSSPropertyWordWrap, CSSValueBreakWord);
 691         addCSSProperty(attr, CSSPropertyWebkitNbspMode, CSSValueSpace);
 692         addCSSProperty(attr, CSSPropertyWebkitLineBreak, CSSValueAfterWhiteSpace);
 693     }
 694 }
 695
 696 void HTMLElement::setContentEditable(const String &enabled)
 697 {
 698     if (enabled == "inherit") {
 699         ExceptionCode ec;
 700         removeAttribute(contenteditableAttr, ec);
 701     }
 702     else
 703         setAttribute(contenteditableAttr, enabled.isEmpty() ? "true" : enabled);
 704 }
 705
 706 bool HTMLElement::draggable() const
 707 {
 708     return equalIgnoringCase(getAttribute(draggableAttr), "true");
 709 }
 710
 711 void HTMLElement::setDraggable(bool value)
 712 {
 713     setAttribute(draggableAttr, value ? "true" : "false");
 714 }
 715
 716 void HTMLElement::click()
 717 {
 718     dispatchSimulatedClick(0, false, false);
 719 }
 720
 721 // accessKeyAction is used by the accessibility support code
 722 // to send events to elements that our JavaScript caller does
 723 // does not.  The elements JS is interested in have subclasses
 724 // that override this method to direct the click appropriately.
 725 // Here in the base class, then, we only send the click if
 726 // the caller wants it to go to any HTMLElement, and we say
 727 // to send the mouse events in addition to the click.
 728 void HTMLElement::accessKeyAction(bool sendToAnyElement)
 729 {
 730     if (sendToAnyElement)
 731         dispatchSimulatedClick(0, true);
 732 }
 733
 734 String HTMLElement::title() const
 735 {
 736     return getAttribute(titleAttr);
 737 }
 738
 739 short HTMLElement::tabIndex() const
 740 {
 741     if (supportsFocus())
 742         return Element::tabIndex();
 743     return -1;
 744 }
 745
 746 void HTMLElement::setTabIndex(int value)
 747 {
 748     setAttribute(tabindexAttr, String::number(value));
 749 }
 750
 751 PassRefPtr<HTMLCollection> HTMLElement::children()
 752 {
 753     return HTMLCollection::create(this, NodeChildren);
 754 }
 755
 756 // DOM Section 1.1.1
 757 bool HTMLElement::childAllowed(Node *newChild)
 758 {
 759     if (!Element::childAllowed(newChild))
 760         return false;
 761
 762     // For XML documents, we are non-validating and do not check against a DTD, even for HTML elements.
 763     if (!document()->isHTMLDocument())
 764         return true;
 765
 766     // Future-proof for XML content inside HTML documents (we may allow this some day).
 767     if (newChild->isElementNode() && !newChild->isHTMLElement())
 768         return true;
 769
 770     // Elements with forbidden tag status can never have children
 771     if (endTagRequirement() == TagStatusForbidden)
 772         return false;
 773
 774     // Comment nodes are always allowed.
 775     if (newChild->isCommentNode())
 776         return true;
 777
 778     // Now call checkDTD.
 779     return checkDTD(newChild);
 780 }
 781
 782 // DTD Stuff
 783 // This unfortunate function is only needed when checking against the DTD.  Other languages (like SVG) won't need this.
 784 bool HTMLElement::isRecognizedTagName(const QualifiedName& tagName)
 785 {
 786     DEFINE_STATIC_LOCAL(HashSet<AtomicStringImpl*>, tagList, ());
 787     if (tagList.isEmpty()) {
 788         size_t tagCount = 0;
 789         WebCore::QualifiedName** tags = HTMLNames::getHTMLTags(&tagCount);
 790         for (size_t i = 0; i < tagCount; i++)
 791             tagList.add(tags[i]->localName().impl());
 792     }
 793     return tagList.contains(tagName.localName().impl());
 794 }
 795
 796 // The terms inline and block are used here loosely.  Don't make the mistake of assuming all inlines or all blocks
 797 // need to be in these two lists.
 798 static HashSet<AtomicStringImpl*>* inlineTagList()
 799 {
 800     DEFINE_STATIC_LOCAL(HashSet<AtomicStringImpl*>, tagList, ());
 801     if (tagList.isEmpty()) {
 802         tagList.add(ttTag.localName().impl());
 803         tagList.add(iTag.localName().impl());
 804         tagList.add(bTag.localName().impl());
 805         tagList.add(uTag.localName().impl());
 806         tagList.add(sTag.localName().impl());
 807         tagList.add(strikeTag.localName().impl());
 808         tagList.add(bigTag.localName().impl());
 809         tagList.add(smallTag.localName().impl());
 810         tagList.add(emTag.localName().impl());
 811         tagList.add(strongTag.localName().impl());
 812         tagList.add(dfnTag.localName().impl());
 813         tagList.add(codeTag.localName().impl());
 814         tagList.add(sampTag.localName().impl());
 815         tagList.add(kbdTag.localName().impl());
 816         tagList.add(varTag.localName().impl());
 817         tagList.add(citeTag.localName().impl());
 818         tagList.add(abbrTag.localName().impl());
 819         tagList.add(acronymTag.localName().impl());
 820         tagList.add(aTag.localName().impl());
 821         tagList.add(canvasTag.localName().impl());
 822         tagList.add(imgTag.localName().impl());
 823         tagList.add(appletTag.localName().impl());
 824         tagList.add(objectTag.localName().impl());
 825         tagList.add(embedTag.localName().impl());
 826         tagList.add(fontTag.localName().impl());
 827         tagList.add(basefontTag.localName().impl());
 828         tagList.add(brTag.localName().impl());
 829         tagList.add(scriptTag.localName().impl());
 830         tagList.add(styleTag.localName().impl());
 831         tagList.add(linkTag.localName().impl());
 832         tagList.add(mapTag.localName().impl());
 833         tagList.add(qTag.localName().impl());
 834         tagList.add(subTag.localName().impl());
 835         tagList.add(supTag.localName().impl());
 836         tagList.add(spanTag.localName().impl());
 837         tagList.add(bdoTag.localName().impl());
 838         tagList.add(iframeTag.localName().impl());
 839         tagList.add(inputTag.localName().impl());
 840         tagList.add(keygenTag.localName().impl());
 841         tagList.add(selectTag.localName().impl());
 842         tagList.add(datagridTag.localName().impl());
 843         tagList.add(textareaTag.localName().impl());
 844         tagList.add(labelTag.localName().impl());
 845         tagList.add(buttonTag.localName().impl());
 846         tagList.add(datalistTag.localName().impl());
 847         tagList.add(insTag.localName().impl());
 848         tagList.add(delTag.localName().impl());
 849         tagList.add(nobrTag.localName().impl());
 850         tagList.add(wbrTag.localName().impl());
 851 #if ENABLE(VIDEO)
 852         tagList.add(audioTag.localName().impl());
 853         tagList.add(videoTag.localName().impl());
 854 #endif
 855         tagList.add(rpTag.localName().impl());
 856         tagList.add(rtTag.localName().impl());
 857         tagList.add(rubyTag.localName().impl());
 858     }
 859     return &tagList;
 860 }
 861
 862 static HashSet<AtomicStringImpl*>* blockTagList()
 863 {
 864     DEFINE_STATIC_LOCAL(HashSet<AtomicStringImpl*>, tagList, ());
 865     if (tagList.isEmpty()) {
 866         tagList.add(addressTag.localName().impl());
 867         tagList.add(blockquoteTag.localName().impl());
 868         tagList.add(centerTag.localName().impl());
 869         tagList.add(ddTag.localName().impl());
 870         tagList.add(dirTag.localName().impl());
 871         tagList.add(divTag.localName().impl());
 872         tagList.add(dlTag.localName().impl());
 873         tagList.add(dtTag.localName().impl());
 874         tagList.add(fieldsetTag.localName().impl());
 875         tagList.add(formTag.localName().impl());
 876         tagList.add(h1Tag.localName().impl());
 877         tagList.add(h2Tag.localName().impl());
 878         tagList.add(h3Tag.localName().impl());
 879         tagList.add(h4Tag.localName().impl());
 880         tagList.add(h5Tag.localName().impl());
 881         tagList.add(h6Tag.localName().impl());
 882         tagList.add(hrTag.localName().impl());
 883         tagList.add(isindexTag.localName().impl());
 884         tagList.add(layerTag.localName().impl());
 885         tagList.add(liTag.localName().impl());
 886         tagList.add(listingTag.localName().impl());
 887         tagList.add(marqueeTag.localName().impl());
 888         tagList.add(menuTag.localName().impl());
 889         tagList.add(navTag.localName().impl());
 890         tagList.add(noembedTag.localName().impl());
 891         tagList.add(noframesTag.localName().impl());
 892         tagList.add(nolayerTag.localName().impl());
 893         tagList.add(noscriptTag.localName().impl());
 894         tagList.add(olTag.localName().impl());
 895         tagList.add(pTag.localName().impl());
 896         tagList.add(plaintextTag.localName().impl());
 897         tagList.add(preTag.localName().impl());
 898         tagList.add(tableTag.localName().impl());
 899         tagList.add(ulTag.localName().impl());
 900         tagList.add(xmpTag.localName().impl());
 901     }
 902     return &tagList;
 903 }
 904
 905 bool HTMLElement::inEitherTagList(const Node* newChild)
 906 {
 907     if (newChild->isTextNode())
 908         return true;
 909
 910     if (newChild->isHTMLElement()) {
 911         const HTMLElement* child = static_cast<const HTMLElement*>(newChild);
 912         if (inlineTagList()->contains(child->tagQName().localName().impl())) {
 913 #if PLATFORM(MAC)
 914             if (child->tagQName().localName() == styleTag) {
 915                 // Leopard Mail doesn't expect <style> to be in the body of the document, so don't allow it in that case.
 916                 // See <rdar://problem/6621310>
 917                 Settings* settings = newChild->document() ? newChild->document()->settings() : 0;
 918                 if (settings && settings->needsLeopardMailQuirks())
 919                     return false;
 920             }
 921 #endif
 922             return true;
 923         }
 924         if (blockTagList()->contains(child->tagQName().localName().impl()))
 925             return true;
 926         return !isRecognizedTagName(child->tagQName()); // Accept custom html tags
 927     }
 928
 929     return false;
 930 }
 931
 932 bool HTMLElement::inInlineTagList(const Node* newChild)
 933 {
 934     if (newChild->isTextNode())
 935         return true;
 936
 937     if (newChild->isHTMLElement()) {
 938         const HTMLElement* child = static_cast<const HTMLElement*>(newChild);
 939         if (inlineTagList()->contains(child->tagQName().localName().impl()))
 940             return true;
 941         return !isRecognizedTagName(child->tagQName()); // Accept custom html tags
 942     }
 943
 944     return false;
 945 }
 946
 947 bool HTMLElement::inBlockTagList(const Node* newChild)
 948 {
 949     if (newChild->isTextNode())
 950         return true;
 951
 952     if (newChild->isHTMLElement()) {
 953         const HTMLElement* child = static_cast<const HTMLElement*>(newChild);
 954         return (blockTagList()->contains(child->tagQName().localName().impl()));
 955     }
 956
 957     return false;
 958 }
 959
 960 bool HTMLElement::checkDTD(const Node* newChild)
 961 {
 962     if (hasLocalName(addressTag) && newChild->hasTagName(pTag))
 963         return true;
 964     return inEitherTagList(newChild);
 965 }
 966
 967 bool HTMLElement::rendererIsNeeded(RenderStyle *style)
 968 {
 969 #if !ENABLE(XHTMLMP)
 970     if (hasLocalName(noscriptTag)) {
 971         Settings* settings = document()->settings();
 972         if (settings && settings->isJavaScriptEnabled())
 973             return false;
 974     }
 975 #endif
 976     return StyledElement::rendererIsNeeded(style);
 977 }
 978
 979 RenderObject* HTMLElement::createRenderer(RenderArena* arena, RenderStyle* style)
 980 {
 981     if (hasLocalName(wbrTag))
 982         return new (arena) RenderWordBreak(this);
 983     return RenderObject::createObject(this, style);
 984 }
 985
 986 HTMLFormElement* HTMLElement::findFormAncestor() const
 987 {
 988     for (Node* ancestor = parentNode(); ancestor; ancestor = ancestor->parentNode())
 989         if (ancestor->hasTagName(formTag))
 990             return static_cast<HTMLFormElement*>(ancestor);
 991     return 0;
 992 }
 993
 994 HTMLFormElement* HTMLElement::virtualForm() const
 995 {
 996     return findFormAncestor();
 997 }
 998
 999 } // namespace WebCore
1000
1001 #ifndef NDEBUG
1002
1003 // For use in the debugger
1004 void dumpInnerHTML(WebCore::HTMLElement*);
1005
1006 void dumpInnerHTML(WebCore::HTMLElement* element)
1007 {
1008     printf("%s\n", element->innerHTML().ascii().data());
1009 }
1010 #endif