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 * Copyright (C) 2011 Motorola Mobility. All rights reserved. 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIB. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 * 23 */ 24 25#include "config.h" 26#include "HTMLElement.h" 27 28#include "Attribute.h" 29#include "CSSParser.h" 30#include "CSSPropertyNames.h" 31#include "CSSValueKeywords.h" 32#include "CSSValuePool.h" 33#include "DOMSettableTokenList.h" 34#include "DocumentFragment.h" 35#include "Event.h" 36#include "EventListener.h" 37#include "EventNames.h" 38#include "ExceptionCode.h" 39#include "Frame.h" 40#include "FrameLoader.h" 41#include "HTMLBRElement.h" 42#include "HTMLCollection.h" 43#include "HTMLDocument.h" 44#include "HTMLElementFactory.h" 45#include "HTMLFormElement.h" 46#include "HTMLNames.h" 47#include "HTMLParserIdioms.h" 48#include "HTMLTemplateElement.h" 49#include "HTMLTextFormControlElement.h" 50#include "NodeTraversal.h" 51#include "RenderWordBreak.h" 52#include "ScriptController.h" 53#include "ScriptEventListener.h" 54#include "Settings.h" 55#include "StylePropertySet.h" 56#include "Text.h" 57#include "TextIterator.h" 58#include "XMLNames.h" 59#include "markup.h" 60#include <wtf/StdLibExtras.h> 61#include <wtf/text/CString.h> 62 63#if ENABLE(MICRODATA) 64#include "HTMLPropertiesCollection.h" 65#include "MicroDataItemValue.h" 66#endif 67 68namespace WebCore { 69 70using namespace HTMLNames; 71using namespace WTF; 72 73using std::min; 74using std::max; 75 76PassRefPtr<HTMLElement> HTMLElement::create(const QualifiedName& tagName, Document* document) 77{ 78 return adoptRef(new HTMLElement(tagName, document)); 79} 80 81String HTMLElement::nodeName() const 82{ 83 // FIXME: Would be nice to have an atomicstring lookup based off uppercase 84 // chars that does not have to copy the string on a hit in the hash. 85 // FIXME: We should have a way to detect XHTML elements and replace the hasPrefix() check with it. 86 if (document()->isHTMLDocument() && !tagQName().hasPrefix()) 87 return tagQName().localNameUpper(); 88 return Element::nodeName(); 89} 90 91bool HTMLElement::ieForbidsInsertHTML() const 92{ 93 // FIXME: Supposedly IE disallows settting innerHTML, outerHTML 94 // and createContextualFragment on these tags. We have no tests to 95 // verify this however, so this list could be totally wrong. 96 // This list was moved from the previous endTagRequirement() implementation. 97 // This is also called from editing and assumed to be the list of tags 98 // for which no end tag should be serialized. It's unclear if the list for 99 // IE compat and the list for serialization sanity are the same. 100 if (hasLocalName(areaTag) 101 || hasLocalName(baseTag) 102 || hasLocalName(basefontTag) 103 || hasLocalName(brTag) 104 || hasLocalName(colTag) 105 || hasLocalName(embedTag) 106 || hasLocalName(frameTag) 107 || hasLocalName(hrTag) 108 || hasLocalName(imageTag) 109 || hasLocalName(imgTag) 110 || hasLocalName(inputTag) 111 || hasLocalName(isindexTag) 112 || hasLocalName(linkTag) 113 || hasLocalName(metaTag) 114 || hasLocalName(paramTag) 115 || hasLocalName(sourceTag) 116 || hasLocalName(wbrTag)) 117 return true; 118 // FIXME: I'm not sure why dashboard mode would want to change the 119 // serialization of <canvas>, that seems like a bad idea. 120#if ENABLE(DASHBOARD_SUPPORT) 121 if (hasLocalName(canvasTag)) { 122 Settings* settings = document()->settings(); 123 if (settings && settings->usesDashboardBackwardCompatibilityMode()) 124 return true; 125 } 126#endif 127 return false; 128} 129 130static inline int unicodeBidiAttributeForDirAuto(HTMLElement* element) 131{ 132 if (element->hasLocalName(preTag) || element->hasLocalName(textareaTag)) 133 return CSSValueWebkitPlaintext; 134 // FIXME: For bdo element, dir="auto" should result in "bidi-override isolate" but we don't support having multiple values in unicode-bidi yet. 135 // See https://bugs.webkit.org/show_bug.cgi?id=73164. 136 return CSSValueWebkitIsolate; 137} 138 139unsigned HTMLElement::parseBorderWidthAttribute(const AtomicString& value) const 140{ 141 unsigned borderWidth = 0; 142 if (value.isEmpty() || !parseHTMLNonNegativeInteger(value, borderWidth)) 143 return hasLocalName(tableTag) ? 1 : borderWidth; 144 return borderWidth; 145} 146 147void HTMLElement::applyBorderAttributeToStyle(const AtomicString& value, MutableStylePropertySet* style) 148{ 149 addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderWidth, parseBorderWidthAttribute(value), CSSPrimitiveValue::CSS_PX); 150 addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderStyle, CSSValueSolid); 151} 152 153void HTMLElement::mapLanguageAttributeToLocale(const AtomicString& value, MutableStylePropertySet* style) 154{ 155 if (!value.isEmpty()) { 156 // Have to quote so the locale id is treated as a string instead of as a CSS keyword. 157 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitLocale, quoteCSSString(value)); 158 } else { 159 // The empty string means the language is explicitly unknown. 160 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitLocale, CSSValueAuto); 161 } 162} 163 164bool HTMLElement::isPresentationAttribute(const QualifiedName& name) const 165{ 166 if (name == alignAttr || name == contenteditableAttr || name == hiddenAttr || name == langAttr || name.matches(XMLNames::langAttr) || name == draggableAttr || name == dirAttr) 167 return true; 168 return StyledElement::isPresentationAttribute(name); 169} 170 171void HTMLElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style) 172{ 173 if (name == alignAttr) { 174 if (equalIgnoringCase(value, "middle")) 175 addPropertyToPresentationAttributeStyle(style, CSSPropertyTextAlign, CSSValueCenter); 176 else 177 addPropertyToPresentationAttributeStyle(style, CSSPropertyTextAlign, value); 178 } else if (name == contenteditableAttr) { 179 if (value.isEmpty() || equalIgnoringCase(value, "true")) { 180 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitUserModify, CSSValueReadWrite); 181 addPropertyToPresentationAttributeStyle(style, CSSPropertyWordWrap, CSSValueBreakWord); 182 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitNbspMode, CSSValueSpace); 183 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitLineBreak, CSSValueAfterWhiteSpace); 184 } else if (equalIgnoringCase(value, "plaintext-only")) { 185 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitUserModify, CSSValueReadWritePlaintextOnly); 186 addPropertyToPresentationAttributeStyle(style, CSSPropertyWordWrap, CSSValueBreakWord); 187 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitNbspMode, CSSValueSpace); 188 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitLineBreak, CSSValueAfterWhiteSpace); 189 } else if (equalIgnoringCase(value, "false")) 190 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitUserModify, CSSValueReadOnly); 191 } else if (name == hiddenAttr) { 192 addPropertyToPresentationAttributeStyle(style, CSSPropertyDisplay, CSSValueNone); 193 } else if (name == draggableAttr) { 194 if (equalIgnoringCase(value, "true")) { 195 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitUserDrag, CSSValueElement); 196 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitUserSelect, CSSValueNone); 197 } else if (equalIgnoringCase(value, "false")) 198 addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitUserDrag, CSSValueNone); 199 } else if (name == dirAttr) { 200 if (equalIgnoringCase(value, "auto")) 201 addPropertyToPresentationAttributeStyle(style, CSSPropertyUnicodeBidi, unicodeBidiAttributeForDirAuto(this)); 202 else { 203 addPropertyToPresentationAttributeStyle(style, CSSPropertyDirection, value); 204 if (!hasTagName(bdiTag) && !hasTagName(bdoTag) && !hasTagName(outputTag)) 205 addPropertyToPresentationAttributeStyle(style, CSSPropertyUnicodeBidi, CSSValueEmbed); 206 } 207 } else if (name.matches(XMLNames::langAttr)) 208 mapLanguageAttributeToLocale(value, style); 209 else if (name == langAttr) { 210 // xml:lang has a higher priority than lang. 211 if (!fastHasAttribute(XMLNames::langAttr)) 212 mapLanguageAttributeToLocale(value, style); 213 } else 214 StyledElement::collectStyleForPresentationAttribute(name, value, style); 215} 216 217AtomicString HTMLElement::eventNameForAttributeName(const QualifiedName& attrName) const 218{ 219 if (!attrName.namespaceURI().isNull()) 220 return AtomicString(); 221 222 typedef HashMap<AtomicString, AtomicString> StringToStringMap; 223 DEFINE_STATIC_LOCAL(StringToStringMap, attributeNameToEventNameMap, ()); 224 if (!attributeNameToEventNameMap.size()) { 225 attributeNameToEventNameMap.set(onclickAttr.localName(), eventNames().clickEvent); 226 attributeNameToEventNameMap.set(oncontextmenuAttr.localName(), eventNames().contextmenuEvent); 227 attributeNameToEventNameMap.set(ondblclickAttr.localName(), eventNames().dblclickEvent); 228 attributeNameToEventNameMap.set(onmousedownAttr.localName(), eventNames().mousedownEvent); 229 attributeNameToEventNameMap.set(onmouseenterAttr.localName(), eventNames().mouseenterEvent); 230 attributeNameToEventNameMap.set(onmouseleaveAttr.localName(), eventNames().mouseleaveEvent); 231 attributeNameToEventNameMap.set(onmousemoveAttr.localName(), eventNames().mousemoveEvent); 232 attributeNameToEventNameMap.set(onmouseoutAttr.localName(), eventNames().mouseoutEvent); 233 attributeNameToEventNameMap.set(onmouseoverAttr.localName(), eventNames().mouseoverEvent); 234 attributeNameToEventNameMap.set(onmouseupAttr.localName(), eventNames().mouseupEvent); 235 attributeNameToEventNameMap.set(onmousewheelAttr.localName(), eventNames().mousewheelEvent); 236 attributeNameToEventNameMap.set(onfocusAttr.localName(), eventNames().focusEvent); 237 attributeNameToEventNameMap.set(onfocusinAttr.localName(), eventNames().focusinEvent); 238 attributeNameToEventNameMap.set(onfocusoutAttr.localName(), eventNames().focusoutEvent); 239 attributeNameToEventNameMap.set(onblurAttr.localName(), eventNames().blurEvent); 240 attributeNameToEventNameMap.set(onkeydownAttr.localName(), eventNames().keydownEvent); 241 attributeNameToEventNameMap.set(onkeypressAttr.localName(), eventNames().keypressEvent); 242 attributeNameToEventNameMap.set(onkeyupAttr.localName(), eventNames().keyupEvent); 243 attributeNameToEventNameMap.set(onscrollAttr.localName(), eventNames().scrollEvent); 244 attributeNameToEventNameMap.set(onbeforecutAttr.localName(), eventNames().beforecutEvent); 245 attributeNameToEventNameMap.set(oncutAttr.localName(), eventNames().cutEvent); 246 attributeNameToEventNameMap.set(onbeforecopyAttr.localName(), eventNames().beforecopyEvent); 247 attributeNameToEventNameMap.set(oncopyAttr.localName(), eventNames().copyEvent); 248 attributeNameToEventNameMap.set(onbeforepasteAttr.localName(), eventNames().beforepasteEvent); 249 attributeNameToEventNameMap.set(onpasteAttr.localName(), eventNames().pasteEvent); 250 attributeNameToEventNameMap.set(ondragenterAttr.localName(), eventNames().dragenterEvent); 251 attributeNameToEventNameMap.set(ondragoverAttr.localName(), eventNames().dragoverEvent); 252 attributeNameToEventNameMap.set(ondragleaveAttr.localName(), eventNames().dragleaveEvent); 253 attributeNameToEventNameMap.set(ondropAttr.localName(), eventNames().dropEvent); 254 attributeNameToEventNameMap.set(ondragstartAttr.localName(), eventNames().dragstartEvent); 255 attributeNameToEventNameMap.set(ondragAttr.localName(), eventNames().dragEvent); 256 attributeNameToEventNameMap.set(ondragendAttr.localName(), eventNames().dragendEvent); 257 attributeNameToEventNameMap.set(onselectstartAttr.localName(), eventNames().selectstartEvent); 258 attributeNameToEventNameMap.set(onsubmitAttr.localName(), eventNames().submitEvent); 259 attributeNameToEventNameMap.set(onerrorAttr.localName(), eventNames().errorEvent); 260 attributeNameToEventNameMap.set(onwebkitanimationstartAttr.localName(), eventNames().webkitAnimationStartEvent); 261 attributeNameToEventNameMap.set(onwebkitanimationiterationAttr.localName(), eventNames().webkitAnimationIterationEvent); 262 attributeNameToEventNameMap.set(onwebkitanimationendAttr.localName(), eventNames().webkitAnimationEndEvent); 263 attributeNameToEventNameMap.set(onwebkittransitionendAttr.localName(), eventNames().webkitTransitionEndEvent); 264 attributeNameToEventNameMap.set(ontransitionendAttr.localName(), eventNames().webkitTransitionEndEvent); 265 attributeNameToEventNameMap.set(oninputAttr.localName(), eventNames().inputEvent); 266 attributeNameToEventNameMap.set(oninvalidAttr.localName(), eventNames().invalidEvent); 267 attributeNameToEventNameMap.set(ontouchstartAttr.localName(), eventNames().touchstartEvent); 268 attributeNameToEventNameMap.set(ontouchmoveAttr.localName(), eventNames().touchmoveEvent); 269 attributeNameToEventNameMap.set(ontouchendAttr.localName(), eventNames().touchendEvent); 270 attributeNameToEventNameMap.set(ontouchcancelAttr.localName(), eventNames().touchcancelEvent); 271#if ENABLE(FULLSCREEN_API) 272 attributeNameToEventNameMap.set(onwebkitfullscreenchangeAttr.localName(), eventNames().webkitfullscreenchangeEvent); 273 attributeNameToEventNameMap.set(onwebkitfullscreenerrorAttr.localName(), eventNames().webkitfullscreenerrorEvent); 274#endif 275 attributeNameToEventNameMap.set(onabortAttr.localName(), eventNames().abortEvent); 276 attributeNameToEventNameMap.set(oncanplayAttr.localName(), eventNames().canplayEvent); 277 attributeNameToEventNameMap.set(oncanplaythroughAttr.localName(), eventNames().canplaythroughEvent); 278 attributeNameToEventNameMap.set(onchangeAttr.localName(), eventNames().changeEvent); 279 attributeNameToEventNameMap.set(ondurationchangeAttr.localName(), eventNames().durationchangeEvent); 280 attributeNameToEventNameMap.set(onemptiedAttr.localName(), eventNames().emptiedEvent); 281 attributeNameToEventNameMap.set(onendedAttr.localName(), eventNames().endedEvent); 282 attributeNameToEventNameMap.set(onloadeddataAttr.localName(), eventNames().loadeddataEvent); 283 attributeNameToEventNameMap.set(onloadedmetadataAttr.localName(), eventNames().loadedmetadataEvent); 284 attributeNameToEventNameMap.set(onloadstartAttr.localName(), eventNames().loadstartEvent); 285 attributeNameToEventNameMap.set(onpauseAttr.localName(), eventNames().pauseEvent); 286 attributeNameToEventNameMap.set(onplayAttr.localName(), eventNames().playEvent); 287 attributeNameToEventNameMap.set(onplayingAttr.localName(), eventNames().playingEvent); 288 attributeNameToEventNameMap.set(onprogressAttr.localName(), eventNames().progressEvent); 289 attributeNameToEventNameMap.set(onratechangeAttr.localName(), eventNames().ratechangeEvent); 290 attributeNameToEventNameMap.set(onresetAttr.localName(), eventNames().resetEvent); 291 attributeNameToEventNameMap.set(onseekedAttr.localName(), eventNames().seekedEvent); 292 attributeNameToEventNameMap.set(onseekingAttr.localName(), eventNames().seekingEvent); 293 attributeNameToEventNameMap.set(onselectAttr.localName(), eventNames().selectEvent); 294 attributeNameToEventNameMap.set(onstalledAttr.localName(), eventNames().stalledEvent); 295 attributeNameToEventNameMap.set(onsuspendAttr.localName(), eventNames().suspendEvent); 296 attributeNameToEventNameMap.set(ontimeupdateAttr.localName(), eventNames().timeupdateEvent); 297 attributeNameToEventNameMap.set(onvolumechangeAttr.localName(), eventNames().volumechangeEvent); 298 attributeNameToEventNameMap.set(onwaitingAttr.localName(), eventNames().waitingEvent); 299 attributeNameToEventNameMap.set(onloadAttr.localName(), eventNames().loadEvent); 300 } 301 302 return attributeNameToEventNameMap.get(attrName.localName()); 303} 304 305void HTMLElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 306{ 307 if (isIdAttributeName(name) || name == classAttr || name == styleAttr) 308 return StyledElement::parseAttribute(name, value); 309 310 if (name == dirAttr) 311 dirAttributeChanged(value); 312 else if (name == tabindexAttr) { 313 int tabindex = 0; 314 if (value.isEmpty()) 315 clearTabIndexExplicitlyIfNeeded(); 316 else if (parseHTMLInteger(value, tabindex)) { 317 // Clamp tabindex to the range of 'short' to match Firefox's behavior. 318 setTabIndexExplicitly(max(static_cast<int>(std::numeric_limits<short>::min()), min(tabindex, static_cast<int>(std::numeric_limits<short>::max())))); 319 } 320#if ENABLE(MICRODATA) 321 } else if (name == itempropAttr) { 322 setItemProp(value); 323 } else if (name == itemrefAttr) { 324 setItemRef(value); 325 } else if (name == itemtypeAttr) { 326 setItemType(value); 327#endif 328 } else { 329 AtomicString eventName = eventNameForAttributeName(name); 330 if (!eventName.isNull()) 331 setAttributeEventListener(eventName, createAttributeEventListener(this, name, value)); 332 } 333} 334 335String HTMLElement::innerHTML() const 336{ 337 return createMarkup(this, ChildrenOnly); 338} 339 340String HTMLElement::outerHTML() const 341{ 342 return createMarkup(this); 343} 344 345void HTMLElement::setInnerHTML(const String& html, ExceptionCode& ec) 346{ 347 if (RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(html, this, AllowScriptingContent, ec)) { 348 ContainerNode* container = this; 349#if ENABLE(TEMPLATE_ELEMENT) 350 if (hasLocalName(templateTag)) 351 container = toHTMLTemplateElement(this)->content(); 352#endif 353 replaceChildrenWithFragment(container, fragment.release(), ec); 354 } 355} 356 357static void mergeWithNextTextNode(PassRefPtr<Node> node, ExceptionCode& ec) 358{ 359 ASSERT(node && node->isTextNode()); 360 Node* next = node->nextSibling(); 361 if (!next || !next->isTextNode()) 362 return; 363 364 RefPtr<Text> textNode = toText(node.get()); 365 RefPtr<Text> textNext = toText(next); 366 textNode->appendData(textNext->data(), ec); 367 if (ec) 368 return; 369 if (textNext->parentNode()) // Might have been removed by mutation event. 370 textNext->remove(ec); 371} 372 373void HTMLElement::setOuterHTML(const String& html, ExceptionCode& ec) 374{ 375 Node* p = parentNode(); 376 if (!p || !p->isHTMLElement()) { 377 ec = NO_MODIFICATION_ALLOWED_ERR; 378 return; 379 } 380 RefPtr<HTMLElement> parent = toHTMLElement(p); 381 RefPtr<Node> prev = previousSibling(); 382 RefPtr<Node> next = nextSibling(); 383 384 RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(html, parent.get(), AllowScriptingContent, ec); 385 if (ec) 386 return; 387 388 parent->replaceChild(fragment.release(), this, ec); 389 RefPtr<Node> node = next ? next->previousSibling() : 0; 390 if (!ec && node && node->isTextNode()) 391 mergeWithNextTextNode(node.release(), ec); 392 393 if (!ec && prev && prev->isTextNode()) 394 mergeWithNextTextNode(prev.release(), ec); 395} 396 397PassRefPtr<DocumentFragment> HTMLElement::textToFragment(const String& text, ExceptionCode& ec) 398{ 399 RefPtr<DocumentFragment> fragment = DocumentFragment::create(document()); 400 unsigned int i, length = text.length(); 401 UChar c = 0; 402 for (unsigned int start = 0; start < length; ) { 403 404 // Find next line break. 405 for (i = start; i < length; i++) { 406 c = text[i]; 407 if (c == '\r' || c == '\n') 408 break; 409 } 410 411 fragment->appendChild(Text::create(document(), text.substring(start, i - start)), ec); 412 if (ec) 413 return 0; 414 415 if (c == '\r' || c == '\n') { 416 fragment->appendChild(HTMLBRElement::create(document()), ec); 417 if (ec) 418 return 0; 419 // Make sure \r\n doesn't result in two line breaks. 420 if (c == '\r' && i + 1 < length && text[i + 1] == '\n') 421 i++; 422 } 423 424 start = i + 1; // Character after line break. 425 } 426 427 return fragment; 428} 429 430void HTMLElement::setInnerText(const String& text, ExceptionCode& ec) 431{ 432 if (ieForbidsInsertHTML()) { 433 ec = NO_MODIFICATION_ALLOWED_ERR; 434 return; 435 } 436 if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) || 437 hasLocalName(headTag) || hasLocalName(htmlTag) || hasLocalName(tableTag) || 438 hasLocalName(tbodyTag) || hasLocalName(tfootTag) || hasLocalName(theadTag) || 439 hasLocalName(trTag)) { 440 ec = NO_MODIFICATION_ALLOWED_ERR; 441 return; 442 } 443 444 // FIXME: This doesn't take whitespace collapsing into account at all. 445 446 if (!text.contains('\n') && !text.contains('\r')) { 447 if (text.isEmpty()) { 448 removeChildren(); 449 return; 450 } 451 replaceChildrenWithText(this, text, ec); 452 return; 453 } 454 455 // FIXME: Do we need to be able to detect preserveNewline style even when there's no renderer? 456 // FIXME: Can the renderer be out of date here? Do we need to call updateStyleIfNeeded? 457 // For example, for the contents of textarea elements that are display:none? 458 RenderObject* r = renderer(); 459 if (r && r->style()->preserveNewline()) { 460 if (!text.contains('\r')) { 461 replaceChildrenWithText(this, text, ec); 462 return; 463 } 464 String textWithConsistentLineBreaks = text; 465 textWithConsistentLineBreaks.replace("\r\n", "\n"); 466 textWithConsistentLineBreaks.replace('\r', '\n'); 467 replaceChildrenWithText(this, textWithConsistentLineBreaks, ec); 468 return; 469 } 470 471 // Add text nodes and <br> elements. 472 ec = 0; 473 RefPtr<DocumentFragment> fragment = textToFragment(text, ec); 474 if (!ec) 475 replaceChildrenWithFragment(this, fragment.release(), ec); 476} 477 478void HTMLElement::setOuterText(const String &text, ExceptionCode& ec) 479{ 480 if (ieForbidsInsertHTML()) { 481 ec = NO_MODIFICATION_ALLOWED_ERR; 482 return; 483 } 484 if (hasLocalName(colTag) || hasLocalName(colgroupTag) || hasLocalName(framesetTag) || 485 hasLocalName(headTag) || hasLocalName(htmlTag) || hasLocalName(tableTag) || 486 hasLocalName(tbodyTag) || hasLocalName(tfootTag) || hasLocalName(theadTag) || 487 hasLocalName(trTag)) { 488 ec = NO_MODIFICATION_ALLOWED_ERR; 489 return; 490 } 491 492 ContainerNode* parent = parentNode(); 493 if (!parent) { 494 ec = NO_MODIFICATION_ALLOWED_ERR; 495 return; 496 } 497 498 RefPtr<Node> prev = previousSibling(); 499 RefPtr<Node> next = nextSibling(); 500 RefPtr<Node> newChild; 501 ec = 0; 502 503 // Convert text to fragment with <br> tags instead of linebreaks if needed. 504 if (text.contains('\r') || text.contains('\n')) 505 newChild = textToFragment(text, ec); 506 else 507 newChild = Text::create(document(), text); 508 509 if (!this || !parentNode()) 510 ec = HIERARCHY_REQUEST_ERR; 511 if (ec) 512 return; 513 parent->replaceChild(newChild.release(), this, ec); 514 515 RefPtr<Node> node = next ? next->previousSibling() : 0; 516 if (!ec && node && node->isTextNode()) 517 mergeWithNextTextNode(node.release(), ec); 518 519 if (!ec && prev && prev->isTextNode()) 520 mergeWithNextTextNode(prev.release(), ec); 521} 522 523Node* HTMLElement::insertAdjacent(const String& where, Node* newChild, ExceptionCode& ec) 524{ 525 // In Internet Explorer if the element has no parent and where is "beforeBegin" or "afterEnd", 526 // a document fragment is created and the elements appended in the correct order. This document 527 // fragment isn't returned anywhere. 528 // 529 // This is impossible for us to implement as the DOM tree does not allow for such structures, 530 // Opera also appears to disallow such usage. 531 532 if (equalIgnoringCase(where, "beforeBegin")) { 533 ContainerNode* parent = this->parentNode(); 534 return (parent && parent->insertBefore(newChild, this, ec)) ? newChild : 0; 535 } 536 537 if (equalIgnoringCase(where, "afterBegin")) 538 return insertBefore(newChild, firstChild(), ec) ? newChild : 0; 539 540 if (equalIgnoringCase(where, "beforeEnd")) 541 return appendChild(newChild, ec) ? newChild : 0; 542 543 if (equalIgnoringCase(where, "afterEnd")) { 544 ContainerNode* parent = this->parentNode(); 545 return (parent && parent->insertBefore(newChild, nextSibling(), ec)) ? newChild : 0; 546 } 547 548 // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative. 549 ec = NOT_SUPPORTED_ERR; 550 return 0; 551} 552 553Element* HTMLElement::insertAdjacentElement(const String& where, Element* newChild, ExceptionCode& ec) 554{ 555 if (!newChild) { 556 // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative. 557 ec = TYPE_MISMATCH_ERR; 558 return 0; 559 } 560 561 Node* returnValue = insertAdjacent(where, newChild, ec); 562 ASSERT_WITH_SECURITY_IMPLICATION(!returnValue || returnValue->isElementNode()); 563 return toElement(returnValue); 564} 565 566// Step 3 of http://www.whatwg.org/specs/web-apps/current-work/multipage/apis-in-html-documents.html#insertadjacenthtml() 567static Element* contextElementForInsertion(const String& where, Element* element, ExceptionCode& ec) 568{ 569 if (equalIgnoringCase(where, "beforeBegin") || equalIgnoringCase(where, "afterEnd")) { 570 ContainerNode* parent = element->parentNode(); 571 if (parent && !parent->isElementNode()) { 572 ec = NO_MODIFICATION_ALLOWED_ERR; 573 return 0; 574 } 575 ASSERT_WITH_SECURITY_IMPLICATION(!parent || parent->isElementNode()); 576 return toElement(parent); 577 } 578 if (equalIgnoringCase(where, "afterBegin") || equalIgnoringCase(where, "beforeEnd")) 579 return element; 580 ec = SYNTAX_ERR; 581 return 0; 582} 583 584void HTMLElement::insertAdjacentHTML(const String& where, const String& markup, ExceptionCode& ec) 585{ 586 Element* contextElement = contextElementForInsertion(where, this, ec); 587 if (!contextElement) 588 return; 589 RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(markup, contextElement, AllowScriptingContent, ec); 590 if (!fragment) 591 return; 592 insertAdjacent(where, fragment.get(), ec); 593} 594 595void HTMLElement::insertAdjacentText(const String& where, const String& text, ExceptionCode& ec) 596{ 597 RefPtr<Text> textNode = document()->createTextNode(text); 598 insertAdjacent(where, textNode.get(), ec); 599} 600 601void HTMLElement::applyAlignmentAttributeToStyle(const AtomicString& alignment, MutableStylePropertySet* style) 602{ 603 // Vertical alignment with respect to the current baseline of the text 604 // right or left means floating images. 605 int floatValue = CSSValueInvalid; 606 int verticalAlignValue = CSSValueInvalid; 607 608 if (equalIgnoringCase(alignment, "absmiddle")) 609 verticalAlignValue = CSSValueMiddle; 610 else if (equalIgnoringCase(alignment, "absbottom")) 611 verticalAlignValue = CSSValueBottom; 612 else if (equalIgnoringCase(alignment, "left")) { 613 floatValue = CSSValueLeft; 614 verticalAlignValue = CSSValueTop; 615 } else if (equalIgnoringCase(alignment, "right")) { 616 floatValue = CSSValueRight; 617 verticalAlignValue = CSSValueTop; 618 } else if (equalIgnoringCase(alignment, "top")) 619 verticalAlignValue = CSSValueTop; 620 else if (equalIgnoringCase(alignment, "middle")) 621 verticalAlignValue = CSSValueWebkitBaselineMiddle; 622 else if (equalIgnoringCase(alignment, "center")) 623 verticalAlignValue = CSSValueMiddle; 624 else if (equalIgnoringCase(alignment, "bottom")) 625 verticalAlignValue = CSSValueBaseline; 626 else if (equalIgnoringCase(alignment, "texttop")) 627 verticalAlignValue = CSSValueTextTop; 628 629 if (floatValue != CSSValueInvalid) 630 addPropertyToPresentationAttributeStyle(style, CSSPropertyFloat, floatValue); 631 632 if (verticalAlignValue != CSSValueInvalid) 633 addPropertyToPresentationAttributeStyle(style, CSSPropertyVerticalAlign, verticalAlignValue); 634} 635 636bool HTMLElement::hasCustomFocusLogic() const 637{ 638 return false; 639} 640 641bool HTMLElement::supportsFocus() const 642{ 643 return Element::supportsFocus() || (rendererIsEditable() && parentNode() && !parentNode()->rendererIsEditable()); 644} 645 646String HTMLElement::contentEditable() const 647{ 648 const AtomicString& value = fastGetAttribute(contenteditableAttr); 649 650 if (value.isNull()) 651 return "inherit"; 652 if (value.isEmpty() || equalIgnoringCase(value, "true")) 653 return "true"; 654 if (equalIgnoringCase(value, "false")) 655 return "false"; 656 if (equalIgnoringCase(value, "plaintext-only")) 657 return "plaintext-only"; 658 659 return "inherit"; 660} 661 662void HTMLElement::setContentEditable(const String& enabled, ExceptionCode& ec) 663{ 664 if (equalIgnoringCase(enabled, "true")) 665 setAttribute(contenteditableAttr, "true"); 666 else if (equalIgnoringCase(enabled, "false")) 667 setAttribute(contenteditableAttr, "false"); 668 else if (equalIgnoringCase(enabled, "plaintext-only")) 669 setAttribute(contenteditableAttr, "plaintext-only"); 670 else if (equalIgnoringCase(enabled, "inherit")) 671 removeAttribute(contenteditableAttr); 672 else 673 ec = SYNTAX_ERR; 674} 675 676bool HTMLElement::draggable() const 677{ 678 return equalIgnoringCase(getAttribute(draggableAttr), "true"); 679} 680 681void HTMLElement::setDraggable(bool value) 682{ 683 setAttribute(draggableAttr, value ? "true" : "false"); 684} 685 686bool HTMLElement::spellcheck() const 687{ 688 return isSpellCheckingEnabled(); 689} 690 691void HTMLElement::setSpellcheck(bool enable) 692{ 693 setAttribute(spellcheckAttr, enable ? "true" : "false"); 694} 695 696 697void HTMLElement::click() 698{ 699 dispatchSimulatedClick(0, SendNoEvents, DoNotShowPressedLook); 700} 701 702void HTMLElement::accessKeyAction(bool sendMouseEvents) 703{ 704 dispatchSimulatedClick(0, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents); 705} 706 707String HTMLElement::title() const 708{ 709 return getAttribute(titleAttr); 710} 711 712short HTMLElement::tabIndex() const 713{ 714 if (supportsFocus()) 715 return Element::tabIndex(); 716 return -1; 717} 718 719void HTMLElement::setTabIndex(int value) 720{ 721 setAttribute(tabindexAttr, String::number(value)); 722} 723 724TranslateAttributeMode HTMLElement::translateAttributeMode() const 725{ 726 const AtomicString& value = getAttribute(translateAttr); 727 728 if (value == nullAtom) 729 return TranslateAttributeInherit; 730 if (equalIgnoringCase(value, "yes") || equalIgnoringCase(value, "")) 731 return TranslateAttributeYes; 732 if (equalIgnoringCase(value, "no")) 733 return TranslateAttributeNo; 734 735 return TranslateAttributeInherit; 736} 737 738bool HTMLElement::translate() const 739{ 740 for (const Node* n = this; n; n = n->parentNode()) { 741 if (n->isHTMLElement()) { 742 TranslateAttributeMode mode = static_cast<const HTMLElement*>(n)->translateAttributeMode(); 743 if (mode != TranslateAttributeInherit) { 744 ASSERT(mode == TranslateAttributeYes || mode == TranslateAttributeNo); 745 return mode == TranslateAttributeYes; 746 } 747 } 748 } 749 750 // Default on the root element is translate=yes. 751 return true; 752} 753 754void HTMLElement::setTranslate(bool enable) 755{ 756 setAttribute(translateAttr, enable ? "yes" : "no"); 757} 758 759 760PassRefPtr<HTMLCollection> HTMLElement::children() 761{ 762 return ensureCachedHTMLCollection(NodeChildren); 763} 764 765bool HTMLElement::rendererIsNeeded(const NodeRenderingContext& context) 766{ 767 if (hasLocalName(noscriptTag)) { 768 Frame* frame = document()->frame(); 769 if (frame && frame->script()->canExecuteScripts(NotAboutToExecuteScript)) 770 return false; 771 } else if (hasLocalName(noembedTag)) { 772 Frame* frame = document()->frame(); 773 if (frame && frame->loader()->subframeLoader()->allowPlugins(NotAboutToInstantiatePlugin)) 774 return false; 775 } 776 return StyledElement::rendererIsNeeded(context); 777} 778 779RenderObject* HTMLElement::createRenderer(RenderArena* arena, RenderStyle* style) 780{ 781 if (hasLocalName(wbrTag)) 782 return new (arena) RenderWordBreak(this); 783 return RenderObject::createObject(this, style); 784} 785 786HTMLFormElement* HTMLElement::findFormAncestor() const 787{ 788 for (ContainerNode* ancestor = parentNode(); ancestor; ancestor = ancestor->parentNode()) { 789 if (ancestor->hasTagName(formTag)) 790 return static_cast<HTMLFormElement*>(ancestor); 791 } 792 return 0; 793} 794 795HTMLFormElement* HTMLElement::virtualForm() const 796{ 797 return findFormAncestor(); 798} 799 800static inline bool elementAffectsDirectionality(const Node* node) 801{ 802 return node->isHTMLElement() && (node->hasTagName(bdiTag) || toHTMLElement(node)->hasAttribute(dirAttr)); 803} 804 805static void setHasDirAutoFlagRecursively(Node* firstNode, bool flag, Node* lastNode = 0) 806{ 807 firstNode->setSelfOrAncestorHasDirAutoAttribute(flag); 808 809 Node* node = firstNode->firstChild(); 810 811 while (node) { 812 if (node->selfOrAncestorHasDirAutoAttribute() == flag) 813 return; 814 815 if (elementAffectsDirectionality(node)) { 816 if (node == lastNode) 817 return; 818 node = NodeTraversal::nextSkippingChildren(node, firstNode); 819 continue; 820 } 821 node->setSelfOrAncestorHasDirAutoAttribute(flag); 822 if (node == lastNode) 823 return; 824 node = NodeTraversal::next(node, firstNode); 825 } 826} 827 828void HTMLElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) 829{ 830 StyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta); 831 adjustDirectionalityIfNeededAfterChildrenChanged(beforeChange, childCountDelta); 832} 833 834bool HTMLElement::hasDirectionAuto() const 835{ 836 const AtomicString& direction = fastGetAttribute(dirAttr); 837 return (hasTagName(bdiTag) && direction == nullAtom) || equalIgnoringCase(direction, "auto"); 838} 839 840TextDirection HTMLElement::directionalityIfhasDirAutoAttribute(bool& isAuto) const 841{ 842 if (!(selfOrAncestorHasDirAutoAttribute() && hasDirectionAuto())) { 843 isAuto = false; 844 return LTR; 845 } 846 847 isAuto = true; 848 return directionality(); 849} 850 851TextDirection HTMLElement::directionality(Node** strongDirectionalityTextNode) const 852{ 853 if (isHTMLTextFormControlElement(this)) { 854 HTMLTextFormControlElement* textElement = toHTMLTextFormControlElement(const_cast<HTMLElement*>(this)); 855 bool hasStrongDirectionality; 856 Unicode::Direction textDirection = textElement->value().defaultWritingDirection(&hasStrongDirectionality); 857 if (strongDirectionalityTextNode) 858 *strongDirectionalityTextNode = hasStrongDirectionality ? textElement : 0; 859 return (textDirection == Unicode::LeftToRight) ? LTR : RTL; 860 } 861 862 Node* node = firstChild(); 863 while (node) { 864 // Skip bdi, script, style and text form controls. 865 if (equalIgnoringCase(node->nodeName(), "bdi") || node->hasTagName(scriptTag) || node->hasTagName(styleTag) 866 || (node->isElementNode() && toElement(node)->isTextFormControl())) { 867 node = NodeTraversal::nextSkippingChildren(node, this); 868 continue; 869 } 870 871 // Skip elements with valid dir attribute 872 if (node->isElementNode()) { 873 AtomicString dirAttributeValue = toElement(node)->fastGetAttribute(dirAttr); 874 if (equalIgnoringCase(dirAttributeValue, "rtl") || equalIgnoringCase(dirAttributeValue, "ltr") || equalIgnoringCase(dirAttributeValue, "auto")) { 875 node = NodeTraversal::nextSkippingChildren(node, this); 876 continue; 877 } 878 } 879 880 if (node->isTextNode()) { 881 bool hasStrongDirectionality; 882 WTF::Unicode::Direction textDirection = node->textContent(true).defaultWritingDirection(&hasStrongDirectionality); 883 if (hasStrongDirectionality) { 884 if (strongDirectionalityTextNode) 885 *strongDirectionalityTextNode = node; 886 return (textDirection == WTF::Unicode::LeftToRight) ? LTR : RTL; 887 } 888 } 889 node = NodeTraversal::next(node, this); 890 } 891 if (strongDirectionalityTextNode) 892 *strongDirectionalityTextNode = 0; 893 return LTR; 894} 895 896void HTMLElement::dirAttributeChanged(const AtomicString& value) 897{ 898 Element* parent = parentElement(); 899 900 if (parent && parent->isHTMLElement() && parent->selfOrAncestorHasDirAutoAttribute()) 901 toHTMLElement(parent)->adjustDirectionalityIfNeededAfterChildAttributeChanged(this); 902 903 if (equalIgnoringCase(value, "auto")) 904 calculateAndAdjustDirectionality(); 905} 906 907void HTMLElement::adjustDirectionalityIfNeededAfterChildAttributeChanged(Element* child) 908{ 909 ASSERT(selfOrAncestorHasDirAutoAttribute()); 910 Node* strongDirectionalityTextNode; 911 TextDirection textDirection = directionality(&strongDirectionalityTextNode); 912 setHasDirAutoFlagRecursively(child, false); 913 if (renderer() && renderer()->style() && renderer()->style()->direction() != textDirection) { 914 Element* elementToAdjust = this; 915 for (; elementToAdjust; elementToAdjust = elementToAdjust->parentElement()) { 916 if (elementAffectsDirectionality(elementToAdjust)) { 917 elementToAdjust->setNeedsStyleRecalc(); 918 return; 919 } 920 } 921 } 922} 923 924void HTMLElement::calculateAndAdjustDirectionality() 925{ 926 Node* strongDirectionalityTextNode; 927 TextDirection textDirection = directionality(&strongDirectionalityTextNode); 928 setHasDirAutoFlagRecursively(this, true, strongDirectionalityTextNode); 929 if (renderer() && renderer()->style() && renderer()->style()->direction() != textDirection) 930 setNeedsStyleRecalc(); 931} 932 933void HTMLElement::adjustDirectionalityIfNeededAfterChildrenChanged(Node* beforeChange, int childCountDelta) 934{ 935 if ((!document() || document()->renderer()) && childCountDelta < 0) { 936 Node* node = beforeChange ? NodeTraversal::nextSkippingChildren(beforeChange) : 0; 937 for (int counter = 0; node && counter < childCountDelta; counter++, node = NodeTraversal::nextSkippingChildren(node)) { 938 if (elementAffectsDirectionality(node)) 939 continue; 940 941 setHasDirAutoFlagRecursively(node, false); 942 } 943 } 944 945 if (!selfOrAncestorHasDirAutoAttribute()) 946 return; 947 948 Node* oldMarkedNode = beforeChange ? NodeTraversal::nextSkippingChildren(beforeChange) : 0; 949 while (oldMarkedNode && elementAffectsDirectionality(oldMarkedNode)) 950 oldMarkedNode = NodeTraversal::nextSkippingChildren(oldMarkedNode, this); 951 if (oldMarkedNode) 952 setHasDirAutoFlagRecursively(oldMarkedNode, false); 953 954 for (Element* elementToAdjust = this; elementToAdjust; elementToAdjust = elementToAdjust->parentElement()) { 955 if (elementAffectsDirectionality(elementToAdjust)) { 956 toHTMLElement(elementToAdjust)->calculateAndAdjustDirectionality(); 957 return; 958 } 959 } 960} 961 962bool HTMLElement::isURLAttribute(const Attribute& attribute) const 963{ 964#if ENABLE(MICRODATA) 965 if (attribute.name() == itemidAttr) 966 return true; 967#endif 968 return StyledElement::isURLAttribute(attribute); 969} 970 971#if ENABLE(MICRODATA) 972void HTMLElement::setItemValue(const String& value, ExceptionCode& ec) 973{ 974 if (!hasAttribute(itempropAttr) || hasAttribute(itemscopeAttr)) { 975 ec = INVALID_ACCESS_ERR; 976 return; 977 } 978 979 setItemValueText(value, ec); 980} 981 982PassRefPtr<MicroDataItemValue> HTMLElement::itemValue() const 983{ 984 if (!hasAttribute(itempropAttr)) 985 return 0; 986 987 if (hasAttribute(itemscopeAttr)) 988 return MicroDataItemValue::createFromNode(const_cast<HTMLElement* const>(this)); 989 990 return MicroDataItemValue::createFromString(itemValueText()); 991} 992 993String HTMLElement::itemValueText() const 994{ 995 return textContent(true); 996} 997 998void HTMLElement::setItemValueText(const String& value, ExceptionCode& ec) 999{ 1000 setTextContent(value, ec); 1001} 1002 1003PassRefPtr<HTMLPropertiesCollection> HTMLElement::properties() 1004{ 1005 return static_cast<HTMLPropertiesCollection*>(ensureCachedHTMLCollection(ItemProperties).get()); 1006} 1007 1008void HTMLElement::getItemRefElements(Vector<HTMLElement*>& itemRefElements) 1009{ 1010 if (!fastHasAttribute(itemscopeAttr)) 1011 return; 1012 1013 if (!fastHasAttribute(itemrefAttr) || !itemRef()->length()) { 1014 itemRefElements.append(this); 1015 return; 1016 } 1017 1018 DOMSettableTokenList* itemRefs = itemRef(); 1019 RefPtr<DOMSettableTokenList> processedItemRef = DOMSettableTokenList::create(); 1020 1021 Node* rootNode; 1022 if (inDocument()) 1023 rootNode = document(); 1024 else { 1025 rootNode = this; 1026 while (Node* parent = rootNode->parentNode()) 1027 rootNode = parent; 1028 } 1029 1030 for (Node* current = rootNode; current; current = NodeTraversal::next(current, rootNode)) { 1031 if (!current->isHTMLElement()) 1032 continue; 1033 HTMLElement* element = toHTMLElement(current); 1034 1035 if (element == this) { 1036 itemRefElements.append(element); 1037 continue; 1038 } 1039 1040 const AtomicString& id = element->getIdAttribute(); 1041 if (!processedItemRef->tokens().contains(id) && itemRefs->tokens().contains(id)) { 1042 processedItemRef->setValue(id); 1043 if (!element->isDescendantOf(this)) 1044 itemRefElements.append(element); 1045 } 1046 } 1047} 1048#endif 1049 1050void HTMLElement::addHTMLLengthToStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, const String& value) 1051{ 1052 // FIXME: This function should not spin up the CSS parser, but should instead just figure out the correct 1053 // length unit and make the appropriate parsed value. 1054 1055 // strip attribute garbage.. 1056 StringImpl* v = value.impl(); 1057 if (v) { 1058 unsigned int l = 0; 1059 1060 while (l < v->length() && (*v)[l] <= ' ') 1061 l++; 1062 1063 for (; l < v->length(); l++) { 1064 UChar cc = (*v)[l]; 1065 if (cc > '9') 1066 break; 1067 if (cc < '0') { 1068 if (cc == '%' || cc == '*') 1069 l++; 1070 if (cc != '.') 1071 break; 1072 } 1073 } 1074 1075 if (l != v->length()) { 1076 addPropertyToPresentationAttributeStyle(style, propertyID, v->substring(0, l)); 1077 return; 1078 } 1079 } 1080 1081 addPropertyToPresentationAttributeStyle(style, propertyID, value); 1082} 1083 1084static RGBA32 parseColorStringWithCrazyLegacyRules(const String& colorString) 1085{ 1086 // Per spec, only look at the first 128 digits of the string. 1087 const size_t maxColorLength = 128; 1088 // We'll pad the buffer with two extra 0s later, so reserve two more than the max. 1089 Vector<char, maxColorLength+2> digitBuffer; 1090 1091 size_t i = 0; 1092 // Skip a leading #. 1093 if (colorString[0] == '#') 1094 i = 1; 1095 1096 // Grab the first 128 characters, replacing non-hex characters with 0. 1097 // Non-BMP characters are replaced with "00" due to them appearing as two "characters" in the String. 1098 for (; i < colorString.length() && digitBuffer.size() < maxColorLength; i++) { 1099 if (!isASCIIHexDigit(colorString[i])) 1100 digitBuffer.append('0'); 1101 else 1102 digitBuffer.append(colorString[i]); 1103 } 1104 1105 if (!digitBuffer.size()) 1106 return Color::black; 1107 1108 // Pad the buffer out to at least the next multiple of three in size. 1109 digitBuffer.append('0'); 1110 digitBuffer.append('0'); 1111 1112 if (digitBuffer.size() < 6) 1113 return makeRGB(toASCIIHexValue(digitBuffer[0]), toASCIIHexValue(digitBuffer[1]), toASCIIHexValue(digitBuffer[2])); 1114 1115 // Split the digits into three components, then search the last 8 digits of each component. 1116 ASSERT(digitBuffer.size() >= 6); 1117 size_t componentLength = digitBuffer.size() / 3; 1118 size_t componentSearchWindowLength = min<size_t>(componentLength, 8); 1119 size_t redIndex = componentLength - componentSearchWindowLength; 1120 size_t greenIndex = componentLength * 2 - componentSearchWindowLength; 1121 size_t blueIndex = componentLength * 3 - componentSearchWindowLength; 1122 // Skip digits until one of them is non-zero, or we've only got two digits left in the component. 1123 while (digitBuffer[redIndex] == '0' && digitBuffer[greenIndex] == '0' && digitBuffer[blueIndex] == '0' && (componentLength - redIndex) > 2) { 1124 redIndex++; 1125 greenIndex++; 1126 blueIndex++; 1127 } 1128 ASSERT(redIndex + 1 < componentLength); 1129 ASSERT(greenIndex >= componentLength); 1130 ASSERT(greenIndex + 1 < componentLength * 2); 1131 ASSERT(blueIndex >= componentLength * 2); 1132 ASSERT_WITH_SECURITY_IMPLICATION(blueIndex + 1 < digitBuffer.size()); 1133 1134 int redValue = toASCIIHexValue(digitBuffer[redIndex], digitBuffer[redIndex + 1]); 1135 int greenValue = toASCIIHexValue(digitBuffer[greenIndex], digitBuffer[greenIndex + 1]); 1136 int blueValue = toASCIIHexValue(digitBuffer[blueIndex], digitBuffer[blueIndex + 1]); 1137 return makeRGB(redValue, greenValue, blueValue); 1138} 1139 1140// Color parsing that matches HTML's "rules for parsing a legacy color value" 1141void HTMLElement::addHTMLColorToStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, const String& attributeValue) 1142{ 1143 // An empty string doesn't apply a color. (One containing only whitespace does, which is why this check occurs before stripping.) 1144 if (attributeValue.isEmpty()) 1145 return; 1146 1147 String colorString = attributeValue.stripWhiteSpace(); 1148 1149 // "transparent" doesn't apply a color either. 1150 if (equalIgnoringCase(colorString, "transparent")) 1151 return; 1152 1153 // If the string is a named CSS color or a 3/6-digit hex color, use that. 1154 Color parsedColor(colorString); 1155 if (!parsedColor.isValid()) 1156 parsedColor.setRGB(parseColorStringWithCrazyLegacyRules(colorString)); 1157 1158 style->setProperty(propertyID, cssValuePool().createColorValue(parsedColor.rgb())); 1159} 1160 1161} // namespace WebCore 1162 1163#ifndef NDEBUG 1164 1165// For use in the debugger 1166void dumpInnerHTML(WebCore::HTMLElement*); 1167 1168void dumpInnerHTML(WebCore::HTMLElement* element) 1169{ 1170 printf("%s\n", element->innerHTML().ascii().data()); 1171} 1172#endif 1173