1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * (C) 2001 Peter Kelly (pmk@post.com)
5 * (C) 2001 Dirk Mueller (mueller@kde.org)
6 * (C) 2007 David Smith (catfish.man@gmail.com)
7 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
8 * (C) 2007 Eric Seidel (eric@webkit.org)
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
19 *
20 * You should have received a copy of the GNU Library General Public License
21 * along with this library; see the file COPYING.LIB. If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
24 */
25
26 #include "config.h"
27 #include "core/dom/Element.h"
28
29 #include "bindings/core/v8/DOMDataStore.h"
30 #include "bindings/core/v8/Dictionary.h"
31 #include "bindings/core/v8/ExceptionMessages.h"
32 #include "bindings/core/v8/ExceptionState.h"
33 #include "bindings/core/v8/V8DOMWrapper.h"
34 #include "bindings/core/v8/V8PerContextData.h"
35 #include "core/CSSValueKeywords.h"
36 #include "core/SVGNames.h"
37 #include "core/XLinkNames.h"
38 #include "core/XMLNames.h"
39 #include "core/accessibility/AXObjectCache.h"
40 #include "core/animation/AnimationTimeline.h"
41 #include "core/animation/css/CSSAnimations.h"
42 #include "core/css/CSSImageValue.h"
43 #include "core/css/CSSStyleSheet.h"
44 #include "core/css/CSSValuePool.h"
45 #include "core/css/PropertySetCSSStyleDeclaration.h"
46 #include "core/css/StylePropertySet.h"
47 #include "core/css/parser/CSSParser.h"
48 #include "core/css/resolver/StyleResolver.h"
49 #include "core/css/resolver/StyleResolverParentScope.h"
50 #include "core/dom/Attr.h"
51 #include "core/dom/CSSSelectorWatch.h"
52 #include "core/dom/ClientRect.h"
53 #include "core/dom/ClientRectList.h"
54 #include "core/dom/DatasetDOMStringMap.h"
55 #include "core/dom/ElementDataCache.h"
56 #include "core/dom/ElementRareData.h"
57 #include "core/dom/ElementTraversal.h"
58 #include "core/dom/ExceptionCode.h"
59 #include "core/dom/Fullscreen.h"
60 #include "core/dom/MutationObserverInterestGroup.h"
61 #include "core/dom/MutationRecord.h"
62 #include "core/dom/NamedNodeMap.h"
63 #include "core/dom/NodeRenderStyle.h"
64 #include "core/dom/PresentationAttributeStyle.h"
65 #include "core/dom/PseudoElement.h"
66 #include "core/dom/RenderTreeBuilder.h"
67 #include "core/dom/ScriptableDocumentParser.h"
68 #include "core/dom/SelectorQuery.h"
69 #include "core/dom/StyleEngine.h"
70 #include "core/dom/Text.h"
71 #include "core/dom/custom/CustomElement.h"
72 #include "core/dom/custom/CustomElementRegistrationContext.h"
73 #include "core/dom/shadow/InsertionPoint.h"
74 #include "core/dom/shadow/ShadowRoot.h"
75 #include "core/editing/FrameSelection.h"
76 #include "core/editing/TextIterator.h"
77 #include "core/editing/htmlediting.h"
78 #include "core/editing/markup.h"
79 #include "core/events/EventDispatcher.h"
80 #include "core/events/FocusEvent.h"
81 #include "core/frame/FrameView.h"
82 #include "core/frame/LocalFrame.h"
83 #include "core/frame/Settings.h"
84 #include "core/frame/UseCounter.h"
85 #include "core/frame/csp/ContentSecurityPolicy.h"
86 #include "core/html/ClassList.h"
87 #include "core/html/HTMLCanvasElement.h"
88 #include "core/html/HTMLCollection.h"
89 #include "core/html/HTMLDocument.h"
90 #include "core/html/HTMLElement.h"
91 #include "core/html/HTMLFormControlsCollection.h"
92 #include "core/html/HTMLFrameElementBase.h"
93 #include "core/html/HTMLFrameOwnerElement.h"
94 #include "core/html/HTMLOptionsCollection.h"
95 #include "core/html/HTMLPlugInElement.h"
96 #include "core/html/HTMLTableRowsCollection.h"
97 #include "core/html/HTMLTemplateElement.h"
98 #include "core/html/parser/HTMLParserIdioms.h"
99 #include "core/inspector/InspectorInstrumentation.h"
100 #include "core/page/Chrome.h"
101 #include "core/page/ChromeClient.h"
102 #include "core/page/FocusController.h"
103 #include "core/page/Page.h"
104 #include "core/page/PointerLockController.h"
105 #include "core/rendering/RenderLayer.h"
106 #include "core/rendering/RenderView.h"
107 #include "core/rendering/compositing/RenderLayerCompositor.h"
108 #include "core/svg/SVGDocumentExtensions.h"
109 #include "core/svg/SVGElement.h"
110 #include "platform/EventDispatchForbiddenScope.h"
111 #include "platform/RuntimeEnabledFeatures.h"
112 #include "platform/UserGestureIndicator.h"
113 #include "platform/scroll/ScrollableArea.h"
114 #include "wtf/BitVector.h"
115 #include "wtf/HashFunctions.h"
116 #include "wtf/text/CString.h"
117 #include "wtf/text/StringBuilder.h"
118 #include "wtf/text/TextPosition.h"
119
120 namespace blink {
121
122 using namespace HTMLNames;
123 using namespace XMLNames;
124
125 typedef WillBeHeapVector<RefPtrWillBeMember<Attr> > AttrNodeList;
126
findAttrNodeInList(const AttrNodeList & attrNodeList,const QualifiedName & name)127 static Attr* findAttrNodeInList(const AttrNodeList& attrNodeList, const QualifiedName& name)
128 {
129 AttrNodeList::const_iterator end = attrNodeList.end();
130 for (AttrNodeList::const_iterator it = attrNodeList.begin(); it != end; ++it) {
131 if ((*it)->qualifiedName() == name)
132 return it->get();
133 }
134 return 0;
135 }
136
create(const QualifiedName & tagName,Document * document)137 PassRefPtrWillBeRawPtr<Element> Element::create(const QualifiedName& tagName, Document* document)
138 {
139 return adoptRefWillBeNoop(new Element(tagName, document, CreateElement));
140 }
141
Element(const QualifiedName & tagName,Document * document,ConstructionType type)142 Element::Element(const QualifiedName& tagName, Document* document, ConstructionType type)
143 : ContainerNode(document, type)
144 , m_tagName(tagName)
145 {
146 }
147
~Element()148 Element::~Element()
149 {
150 ASSERT(needsAttach());
151
152 #if !ENABLE(OILPAN)
153 if (hasRareData())
154 elementRareData()->clearShadow();
155
156 if (isCustomElement())
157 CustomElement::wasDestroyed(this);
158
159 if (hasSyntheticAttrChildNodes())
160 detachAllAttrNodesFromElement();
161
162 // With Oilpan, either the Element has been removed from the Document
163 // or the Document is dead as well. If the Element has been removed from
164 // the Document the element has already been removed from the pending
165 // resources. If the document is also dead, there is no need to remove
166 // the element from the pending resources.
167 if (hasPendingResources()) {
168 document().accessSVGExtensions().removeElementFromPendingResources(this);
169 ASSERT(!hasPendingResources());
170 }
171 #endif
172 }
173
elementRareData() const174 inline ElementRareData* Element::elementRareData() const
175 {
176 ASSERT(hasRareData());
177 return static_cast<ElementRareData*>(rareData());
178 }
179
ensureElementRareData()180 inline ElementRareData& Element::ensureElementRareData()
181 {
182 return static_cast<ElementRareData&>(ensureRareData());
183 }
184
hasElementFlagInternal(ElementFlags mask) const185 bool Element::hasElementFlagInternal(ElementFlags mask) const
186 {
187 return elementRareData()->hasElementFlag(mask);
188 }
189
setElementFlag(ElementFlags mask,bool value)190 void Element::setElementFlag(ElementFlags mask, bool value)
191 {
192 if (!hasRareData() && !value)
193 return;
194 ensureElementRareData().setElementFlag(mask, value);
195 }
196
clearElementFlag(ElementFlags mask)197 void Element::clearElementFlag(ElementFlags mask)
198 {
199 if (!hasRareData())
200 return;
201 elementRareData()->clearElementFlag(mask);
202 }
203
clearTabIndexExplicitlyIfNeeded()204 void Element::clearTabIndexExplicitlyIfNeeded()
205 {
206 if (hasRareData())
207 elementRareData()->clearTabIndexExplicitly();
208 }
209
setTabIndexExplicitly(short tabIndex)210 void Element::setTabIndexExplicitly(short tabIndex)
211 {
212 ensureElementRareData().setTabIndexExplicitly(tabIndex);
213 }
214
setTabIndex(int value)215 void Element::setTabIndex(int value)
216 {
217 setIntegralAttribute(tabindexAttr, value);
218 }
219
tabIndex() const220 short Element::tabIndex() const
221 {
222 return hasRareData() ? elementRareData()->tabIndex() : 0;
223 }
224
rendererIsFocusable() const225 bool Element::rendererIsFocusable() const
226 {
227 // Elements in canvas fallback content are not rendered, but they are allowed to be
228 // focusable as long as their canvas is displayed and visible.
229 if (isInCanvasSubtree()) {
230 const HTMLCanvasElement* canvas = Traversal<HTMLCanvasElement>::firstAncestorOrSelf(*this);
231 ASSERT(canvas);
232 return canvas->renderer() && canvas->renderer()->style()->visibility() == VISIBLE;
233 }
234
235 // FIXME: These asserts should be in Node::isFocusable, but there are some
236 // callsites like Document::setFocusedElement that would currently fail on
237 // them. See crbug.com/251163
238 if (!renderer()) {
239 // We can't just use needsStyleRecalc() because if the node is in a
240 // display:none tree it might say it needs style recalc but the whole
241 // document is actually up to date.
242 // In addition, style cannot be cleared out for non-active documents,
243 // so in that case the childNeedsStyleRecalc check is invalid.
244 ASSERT(!document().isActive() || !document().childNeedsStyleRecalc());
245 }
246
247 // FIXME: Even if we are not visible, we might have a child that is visible.
248 // Hyatt wants to fix that some day with a "has visible content" flag or the like.
249 if (!renderer() || renderer()->style()->visibility() != VISIBLE)
250 return false;
251
252 return true;
253 }
254
cloneNode(bool deep)255 PassRefPtrWillBeRawPtr<Node> Element::cloneNode(bool deep)
256 {
257 return deep ? cloneElementWithChildren() : cloneElementWithoutChildren();
258 }
259
cloneElementWithChildren()260 PassRefPtrWillBeRawPtr<Element> Element::cloneElementWithChildren()
261 {
262 RefPtrWillBeRawPtr<Element> clone = cloneElementWithoutChildren();
263 cloneChildNodes(clone.get());
264 return clone.release();
265 }
266
cloneElementWithoutChildren()267 PassRefPtrWillBeRawPtr<Element> Element::cloneElementWithoutChildren()
268 {
269 RefPtrWillBeRawPtr<Element> clone = cloneElementWithoutAttributesAndChildren();
270 // This will catch HTML elements in the wrong namespace that are not correctly copied.
271 // This is a sanity check as HTML overloads some of the DOM methods.
272 ASSERT(isHTMLElement() == clone->isHTMLElement());
273
274 clone->cloneDataFromElement(*this);
275 return clone.release();
276 }
277
cloneElementWithoutAttributesAndChildren()278 PassRefPtrWillBeRawPtr<Element> Element::cloneElementWithoutAttributesAndChildren()
279 {
280 return document().createElement(tagQName(), false);
281 }
282
detachAttribute(size_t index)283 PassRefPtrWillBeRawPtr<Attr> Element::detachAttribute(size_t index)
284 {
285 ASSERT(elementData());
286 const Attribute& attribute = elementData()->attributes().at(index);
287 RefPtrWillBeRawPtr<Attr> attrNode = attrIfExists(attribute.name());
288 if (attrNode)
289 detachAttrNodeAtIndex(attrNode.get(), index);
290 else {
291 attrNode = Attr::create(document(), attribute.name(), attribute.value());
292 removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
293 }
294 return attrNode.release();
295 }
296
detachAttrNodeAtIndex(Attr * attr,size_t index)297 void Element::detachAttrNodeAtIndex(Attr* attr, size_t index)
298 {
299 ASSERT(attr);
300 ASSERT(elementData());
301
302 const Attribute& attribute = elementData()->attributes().at(index);
303 ASSERT(attribute.name() == attr->qualifiedName());
304 detachAttrNodeFromElementWithValue(attr, attribute.value());
305 removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
306 }
307
removeAttribute(const QualifiedName & name)308 void Element::removeAttribute(const QualifiedName& name)
309 {
310 if (!elementData())
311 return;
312
313 size_t index = elementData()->attributes().findIndex(name);
314 if (index == kNotFound)
315 return;
316
317 removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
318 }
319
setBooleanAttribute(const QualifiedName & name,bool value)320 void Element::setBooleanAttribute(const QualifiedName& name, bool value)
321 {
322 if (value)
323 setAttribute(name, emptyAtom);
324 else
325 removeAttribute(name);
326 }
327
attributesForBindings() const328 NamedNodeMap* Element::attributesForBindings() const
329 {
330 ElementRareData& rareData = const_cast<Element*>(this)->ensureElementRareData();
331 if (NamedNodeMap* attributeMap = rareData.attributeMap())
332 return attributeMap;
333
334 rareData.setAttributeMap(NamedNodeMap::create(const_cast<Element*>(this)));
335 return rareData.attributeMap();
336 }
337
activeAnimations() const338 ActiveAnimations* Element::activeAnimations() const
339 {
340 if (hasRareData())
341 return elementRareData()->activeAnimations();
342 return 0;
343 }
344
ensureActiveAnimations()345 ActiveAnimations& Element::ensureActiveAnimations()
346 {
347 ElementRareData& rareData = ensureElementRareData();
348 if (!rareData.activeAnimations())
349 rareData.setActiveAnimations(adoptPtrWillBeNoop(new ActiveAnimations()));
350 return *rareData.activeAnimations();
351 }
352
hasActiveAnimations() const353 bool Element::hasActiveAnimations() const
354 {
355 if (!hasRareData())
356 return false;
357
358 ActiveAnimations* activeAnimations = elementRareData()->activeAnimations();
359 return activeAnimations && !activeAnimations->isEmpty();
360 }
361
nodeType() const362 Node::NodeType Element::nodeType() const
363 {
364 return ELEMENT_NODE;
365 }
366
hasAttribute(const QualifiedName & name) const367 bool Element::hasAttribute(const QualifiedName& name) const
368 {
369 return hasAttributeNS(name.namespaceURI(), name.localName());
370 }
371
synchronizeAllAttributes() const372 void Element::synchronizeAllAttributes() const
373 {
374 if (!elementData())
375 return;
376 // NOTE: anyAttributeMatches in SelectorChecker.cpp
377 // currently assumes that all lazy attributes have a null namespace.
378 // If that ever changes we'll need to fix that code.
379 if (elementData()->m_styleAttributeIsDirty) {
380 ASSERT(isStyledElement());
381 synchronizeStyleAttributeInternal();
382 }
383 if (elementData()->m_animatedSVGAttributesAreDirty) {
384 ASSERT(isSVGElement());
385 toSVGElement(this)->synchronizeAnimatedSVGAttribute(anyQName());
386 }
387 }
388
synchronizeAttribute(const QualifiedName & name) const389 inline void Element::synchronizeAttribute(const QualifiedName& name) const
390 {
391 if (!elementData())
392 return;
393 if (UNLIKELY(name == styleAttr && elementData()->m_styleAttributeIsDirty)) {
394 ASSERT(isStyledElement());
395 synchronizeStyleAttributeInternal();
396 return;
397 }
398 if (UNLIKELY(elementData()->m_animatedSVGAttributesAreDirty)) {
399 ASSERT(isSVGElement());
400 // See comment in the AtomicString version of synchronizeAttribute()
401 // also.
402 toSVGElement(this)->synchronizeAnimatedSVGAttribute(name);
403 }
404 }
405
synchronizeAttribute(const AtomicString & localName) const406 void Element::synchronizeAttribute(const AtomicString& localName) const
407 {
408 // This version of synchronizeAttribute() is streamlined for the case where you don't have a full QualifiedName,
409 // e.g when called from DOM API.
410 if (!elementData())
411 return;
412 if (elementData()->m_styleAttributeIsDirty && equalPossiblyIgnoringCase(localName, styleAttr.localName(), shouldIgnoreAttributeCase())) {
413 ASSERT(isStyledElement());
414 synchronizeStyleAttributeInternal();
415 return;
416 }
417 if (elementData()->m_animatedSVGAttributesAreDirty) {
418 // We're not passing a namespace argument on purpose. SVGNames::*Attr are defined w/o namespaces as well.
419
420 // FIXME: this code is called regardless of whether name is an
421 // animated SVG Attribute. It would seem we should only call this method
422 // if SVGElement::isAnimatableAttribute is true, but the list of
423 // animatable attributes in isAnimatableAttribute does not suffice to
424 // pass all layout tests. Also, m_animatedSVGAttributesAreDirty stays
425 // dirty unless synchronizeAnimatedSVGAttribute is called with
426 // anyQName(). This means that even if Element::synchronizeAttribute()
427 // is called on all attributes, m_animatedSVGAttributesAreDirty remains
428 // true.
429 toSVGElement(this)->synchronizeAnimatedSVGAttribute(QualifiedName(nullAtom, localName, nullAtom));
430 }
431 }
432
getAttribute(const QualifiedName & name) const433 const AtomicString& Element::getAttribute(const QualifiedName& name) const
434 {
435 if (!elementData())
436 return nullAtom;
437 synchronizeAttribute(name);
438 if (const Attribute* attribute = elementData()->attributes().find(name))
439 return attribute->value();
440 return nullAtom;
441 }
442
shouldIgnoreAttributeCase() const443 bool Element::shouldIgnoreAttributeCase() const
444 {
445 return isHTMLElement() && document().isHTMLDocument();
446 }
447
scrollIntoView(bool alignToTop)448 void Element::scrollIntoView(bool alignToTop)
449 {
450 document().updateLayoutIgnorePendingStylesheets();
451
452 if (!renderer())
453 return;
454
455 LayoutRect bounds = boundingBox();
456 // Align to the top / bottom and to the closest edge.
457 if (alignToTop)
458 renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
459 else
460 renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignBottomAlways);
461 }
462
scrollIntoViewIfNeeded(bool centerIfNeeded)463 void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
464 {
465 document().updateLayoutIgnorePendingStylesheets();
466
467 if (!renderer())
468 return;
469
470 LayoutRect bounds = boundingBox();
471 if (centerIfNeeded)
472 renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignCenterIfNeeded, ScrollAlignment::alignCenterIfNeeded);
473 else
474 renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);
475 }
476
localZoomForRenderer(RenderObject & renderer)477 static float localZoomForRenderer(RenderObject& renderer)
478 {
479 // FIXME: This does the wrong thing if two opposing zooms are in effect and canceled each
480 // other out, but the alternative is that we'd have to crawl up the whole render tree every
481 // time (or store an additional bit in the RenderStyle to indicate that a zoom was specified).
482 float zoomFactor = 1;
483 if (renderer.style()->effectiveZoom() != 1) {
484 // Need to find the nearest enclosing RenderObject that set up
485 // a differing zoom, and then we divide our result by it to eliminate the zoom.
486 RenderObject* prev = &renderer;
487 for (RenderObject* curr = prev->parent(); curr; curr = curr->parent()) {
488 if (curr->style()->effectiveZoom() != prev->style()->effectiveZoom()) {
489 zoomFactor = prev->style()->zoom();
490 break;
491 }
492 prev = curr;
493 }
494 if (prev->isRenderView())
495 zoomFactor = prev->style()->zoom();
496 }
497 return zoomFactor;
498 }
499
adjustForLocalZoom(LayoutUnit value,RenderObject & renderer)500 static double adjustForLocalZoom(LayoutUnit value, RenderObject& renderer)
501 {
502 float zoomFactor = localZoomForRenderer(renderer);
503 if (zoomFactor == 1)
504 return value.toDouble();
505 return value.toDouble() / zoomFactor;
506 }
507
offsetLeft()508 int Element::offsetLeft()
509 {
510 document().updateLayoutIgnorePendingStylesheets();
511 if (RenderBoxModelObject* renderer = renderBoxModelObject())
512 return lroundf(adjustForLocalZoom(renderer->offsetLeft(), *renderer));
513 return 0;
514 }
515
offsetTop()516 int Element::offsetTop()
517 {
518 document().updateLayoutIgnorePendingStylesheets();
519 if (RenderBoxModelObject* renderer = renderBoxModelObject())
520 return lroundf(adjustForLocalZoom(renderer->pixelSnappedOffsetTop(), *renderer));
521 return 0;
522 }
523
offsetWidth()524 int Element::offsetWidth()
525 {
526 document().updateLayoutIgnorePendingStylesheets();
527 if (RenderBoxModelObject* renderer = renderBoxModelObject())
528 return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetWidth(), *renderer).round();
529 return 0;
530 }
531
offsetHeight()532 int Element::offsetHeight()
533 {
534 document().updateLayoutIgnorePendingStylesheets();
535 if (RenderBoxModelObject* renderer = renderBoxModelObject())
536 return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetHeight(), *renderer).round();
537 return 0;
538 }
539
offsetParentForBindings()540 Element* Element::offsetParentForBindings()
541 {
542 Element* element = offsetParent();
543 if (!element || !element->isInShadowTree())
544 return element;
545 return element->containingShadowRoot()->shouldExposeToBindings() ? element : 0;
546 }
547
offsetParent()548 Element* Element::offsetParent()
549 {
550 document().updateLayoutIgnorePendingStylesheets();
551 if (RenderObject* renderer = this->renderer())
552 return renderer->offsetParent();
553 return 0;
554 }
555
clientLeft()556 int Element::clientLeft()
557 {
558 document().updateLayoutIgnorePendingStylesheets();
559
560 if (RenderBox* renderer = renderBox())
561 return adjustLayoutUnitForAbsoluteZoom(roundToInt(renderer->clientLeft()), *renderer);
562 return 0;
563 }
564
clientTop()565 int Element::clientTop()
566 {
567 document().updateLayoutIgnorePendingStylesheets();
568
569 if (RenderBox* renderer = renderBox())
570 return adjustLayoutUnitForAbsoluteZoom(roundToInt(renderer->clientTop()), *renderer);
571 return 0;
572 }
573
clientWidth()574 int Element::clientWidth()
575 {
576 document().updateLayoutIgnorePendingStylesheets();
577
578 // When in strict mode, clientWidth for the document element should return the width of the containing frame.
579 // When in quirks mode, clientWidth for the body element should return the width of the containing frame.
580 bool inQuirksMode = document().inQuirksMode();
581 if ((!inQuirksMode && document().documentElement() == this)
582 || (inQuirksMode && isHTMLElement() && document().body() == this)) {
583 if (FrameView* view = document().view()) {
584 if (RenderView* renderView = document().renderView())
585 return adjustLayoutUnitForAbsoluteZoom(view->layoutSize().width(), *renderView);
586 }
587 }
588
589 if (RenderBox* renderer = renderBox())
590 return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientWidth(), *renderer).round();
591 return 0;
592 }
593
clientHeight()594 int Element::clientHeight()
595 {
596 document().updateLayoutIgnorePendingStylesheets();
597
598 // When in strict mode, clientHeight for the document element should return the height of the containing frame.
599 // When in quirks mode, clientHeight for the body element should return the height of the containing frame.
600 bool inQuirksMode = document().inQuirksMode();
601
602 if ((!inQuirksMode && document().documentElement() == this)
603 || (inQuirksMode && isHTMLElement() && document().body() == this)) {
604 if (FrameView* view = document().view()) {
605 if (RenderView* renderView = document().renderView())
606 return adjustLayoutUnitForAbsoluteZoom(view->layoutSize().height(), *renderView);
607 }
608 }
609
610 if (RenderBox* renderer = renderBox())
611 return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientHeight(), *renderer).round();
612 return 0;
613 }
614
scrollLeft()615 double Element::scrollLeft()
616 {
617 document().updateLayoutIgnorePendingStylesheets();
618
619 if (document().documentElement() != this) {
620 if (RenderBox* rend = renderBox())
621 return adjustScrollForAbsoluteZoom(rend->scrollLeft(), *rend);
622 return 0;
623 }
624
625 if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
626 if (document().inQuirksMode())
627 return 0;
628
629 if (FrameView* view = document().view()) {
630 if (RenderView* renderView = document().renderView())
631 return adjustScrollForAbsoluteZoom(view->scrollX(), *renderView);
632 }
633 }
634
635 return 0;
636 }
637
scrollTop()638 double Element::scrollTop()
639 {
640 document().updateLayoutIgnorePendingStylesheets();
641
642 if (document().documentElement() != this) {
643 if (RenderBox* rend = renderBox())
644 return adjustScrollForAbsoluteZoom(rend->scrollTop(), *rend);
645 return 0;
646 }
647
648 if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
649 if (document().inQuirksMode())
650 return 0;
651
652 if (FrameView* view = document().view()) {
653 if (RenderView* renderView = document().renderView())
654 return adjustScrollForAbsoluteZoom(view->scrollY(), *renderView);
655 }
656 }
657
658 return 0;
659 }
660
setScrollLeft(double newLeft)661 void Element::setScrollLeft(double newLeft)
662 {
663 document().updateLayoutIgnorePendingStylesheets();
664
665 if (document().documentElement() != this) {
666 if (RenderBox* rend = renderBox())
667 rend->setScrollLeft(LayoutUnit::fromFloatRound(newLeft * rend->style()->effectiveZoom()));
668 return;
669 }
670
671 if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
672 if (document().inQuirksMode())
673 return;
674
675 LocalFrame* frame = document().frame();
676 if (!frame)
677 return;
678 FrameView* view = frame->view();
679 if (!view)
680 return;
681
682 view->setScrollPosition(IntPoint(roundf(newLeft * frame->pageZoomFactor()), view->scrollY()));
683 }
684 }
685
setScrollLeft(const Dictionary & scrollOptionsHorizontal,ExceptionState & exceptionState)686 void Element::setScrollLeft(const Dictionary& scrollOptionsHorizontal, ExceptionState& exceptionState)
687 {
688 String scrollBehaviorString;
689 ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
690 if (DictionaryHelper::get(scrollOptionsHorizontal, "behavior", scrollBehaviorString)) {
691 if (!ScrollableArea::scrollBehaviorFromString(scrollBehaviorString, scrollBehavior)) {
692 exceptionState.throwTypeError("The ScrollBehavior provided is invalid.");
693 return;
694 }
695 }
696
697 double position;
698 if (!DictionaryHelper::get(scrollOptionsHorizontal, "x", position)) {
699 exceptionState.throwTypeError("ScrollOptionsHorizontal must include an 'x' member.");
700 return;
701 }
702
703 // FIXME: Use scrollBehavior to decide whether to scroll smoothly or instantly.
704 setScrollLeft(position);
705 }
706
setScrollTop(double newTop)707 void Element::setScrollTop(double newTop)
708 {
709 document().updateLayoutIgnorePendingStylesheets();
710
711 if (document().documentElement() != this) {
712 if (RenderBox* rend = renderBox())
713 rend->setScrollTop(LayoutUnit::fromFloatRound(newTop * rend->style()->effectiveZoom()));
714 return;
715 }
716
717 if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
718 if (document().inQuirksMode())
719 return;
720
721 LocalFrame* frame = document().frame();
722 if (!frame)
723 return;
724 FrameView* view = frame->view();
725 if (!view)
726 return;
727
728 view->setScrollPosition(IntPoint(view->scrollX(), roundf(newTop * frame->pageZoomFactor())));
729 }
730 }
731
setScrollTop(const Dictionary & scrollOptionsVertical,ExceptionState & exceptionState)732 void Element::setScrollTop(const Dictionary& scrollOptionsVertical, ExceptionState& exceptionState)
733 {
734 String scrollBehaviorString;
735 ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
736 if (DictionaryHelper::get(scrollOptionsVertical, "behavior", scrollBehaviorString)) {
737 if (!ScrollableArea::scrollBehaviorFromString(scrollBehaviorString, scrollBehavior)) {
738 exceptionState.throwTypeError("The ScrollBehavior provided is invalid.");
739 return;
740 }
741 }
742
743 double position;
744 if (!DictionaryHelper::get(scrollOptionsVertical, "y", position)) {
745 exceptionState.throwTypeError("ScrollOptionsVertical must include a 'y' member.");
746 return;
747 }
748
749 // FIXME: Use scrollBehavior to decide whether to scroll smoothly or instantly.
750 setScrollTop(position);
751 }
752
scrollWidth()753 int Element::scrollWidth()
754 {
755 document().updateLayoutIgnorePendingStylesheets();
756 if (RenderBox* rend = renderBox())
757 return adjustLayoutUnitForAbsoluteZoom(rend->scrollWidth(), *rend).toDouble();
758 return 0;
759 }
760
scrollHeight()761 int Element::scrollHeight()
762 {
763 document().updateLayoutIgnorePendingStylesheets();
764 if (RenderBox* rend = renderBox())
765 return adjustLayoutUnitForAbsoluteZoom(rend->scrollHeight(), *rend).toDouble();
766 return 0;
767 }
768
boundsInRootViewSpace()769 IntRect Element::boundsInRootViewSpace()
770 {
771 document().updateLayoutIgnorePendingStylesheets();
772
773 FrameView* view = document().view();
774 if (!view)
775 return IntRect();
776
777 Vector<FloatQuad> quads;
778 if (isSVGElement() && renderer()) {
779 // Get the bounding rectangle from the SVG model.
780 SVGElement* svgElement = toSVGElement(this);
781 FloatRect localRect;
782 if (svgElement->getBoundingBox(localRect))
783 quads.append(renderer()->localToAbsoluteQuad(localRect));
784 } else {
785 // Get the bounding rectangle from the box model.
786 if (renderBoxModelObject())
787 renderBoxModelObject()->absoluteQuads(quads);
788 }
789
790 if (quads.isEmpty())
791 return IntRect();
792
793 IntRect result = quads[0].enclosingBoundingBox();
794 for (size_t i = 1; i < quads.size(); ++i)
795 result.unite(quads[i].enclosingBoundingBox());
796
797 result = view->contentsToRootView(result);
798 return result;
799 }
800
getClientRects()801 PassRefPtrWillBeRawPtr<ClientRectList> Element::getClientRects()
802 {
803 document().updateLayoutIgnorePendingStylesheets();
804
805 RenderBoxModelObject* renderBoxModelObject = this->renderBoxModelObject();
806 if (!renderBoxModelObject)
807 return ClientRectList::create();
808
809 // FIXME: Handle SVG elements.
810 // FIXME: Handle table/inline-table with a caption.
811
812 Vector<FloatQuad> quads;
813 renderBoxModelObject->absoluteQuads(quads);
814 document().adjustFloatQuadsForScrollAndAbsoluteZoom(quads, *renderBoxModelObject);
815 return ClientRectList::create(quads);
816 }
817
getBoundingClientRect()818 PassRefPtrWillBeRawPtr<ClientRect> Element::getBoundingClientRect()
819 {
820 document().updateLayoutIgnorePendingStylesheets();
821
822 Vector<FloatQuad> quads;
823 if (isSVGElement() && renderer() && !renderer()->isSVGRoot()) {
824 // Get the bounding rectangle from the SVG model.
825 SVGElement* svgElement = toSVGElement(this);
826 FloatRect localRect;
827 if (svgElement->getBoundingBox(localRect))
828 quads.append(renderer()->localToAbsoluteQuad(localRect));
829 } else {
830 // Get the bounding rectangle from the box model.
831 if (renderBoxModelObject())
832 renderBoxModelObject()->absoluteQuads(quads);
833 }
834
835 if (quads.isEmpty())
836 return ClientRect::create();
837
838 FloatRect result = quads[0].boundingBox();
839 for (size_t i = 1; i < quads.size(); ++i)
840 result.unite(quads[i].boundingBox());
841
842 ASSERT(renderer());
843 document().adjustFloatRectForScrollAndAbsoluteZoom(result, *renderer());
844 return ClientRect::create(result);
845 }
846
screenRect() const847 IntRect Element::screenRect() const
848 {
849 if (!renderer())
850 return IntRect();
851 // FIXME: this should probably respect transforms
852 return document().view()->contentsToScreen(renderer()->absoluteBoundingBoxRectIgnoringTransforms());
853 }
854
getAttribute(const AtomicString & localName) const855 const AtomicString& Element::getAttribute(const AtomicString& localName) const
856 {
857 if (!elementData())
858 return nullAtom;
859 synchronizeAttribute(localName);
860 if (const Attribute* attribute = elementData()->attributes().find(localName, shouldIgnoreAttributeCase()))
861 return attribute->value();
862 return nullAtom;
863 }
864
getAttributeNS(const AtomicString & namespaceURI,const AtomicString & localName) const865 const AtomicString& Element::getAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const
866 {
867 return getAttribute(QualifiedName(nullAtom, localName, namespaceURI));
868 }
869
setAttribute(const AtomicString & localName,const AtomicString & value,ExceptionState & exceptionState)870 void Element::setAttribute(const AtomicString& localName, const AtomicString& value, ExceptionState& exceptionState)
871 {
872 if (!Document::isValidName(localName)) {
873 exceptionState.throwDOMException(InvalidCharacterError, "'" + localName + "' is not a valid attribute name.");
874 return;
875 }
876
877 synchronizeAttribute(localName);
878 const AtomicString& caseAdjustedLocalName = shouldIgnoreAttributeCase() ? localName.lower() : localName;
879
880 if (!elementData()) {
881 setAttributeInternal(kNotFound, QualifiedName(nullAtom, caseAdjustedLocalName, nullAtom), value, NotInSynchronizationOfLazyAttribute);
882 return;
883 }
884
885 AttributeCollection attributes = elementData()->attributes();
886 size_t index = attributes.findIndex(caseAdjustedLocalName, false);
887 const QualifiedName& qName = index != kNotFound ? attributes[index].name() : QualifiedName(nullAtom, caseAdjustedLocalName, nullAtom);
888 setAttributeInternal(index, qName, value, NotInSynchronizationOfLazyAttribute);
889 }
890
setAttribute(const QualifiedName & name,const AtomicString & value)891 void Element::setAttribute(const QualifiedName& name, const AtomicString& value)
892 {
893 synchronizeAttribute(name);
894 size_t index = elementData() ? elementData()->attributes().findIndex(name) : kNotFound;
895 setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
896 }
897
setSynchronizedLazyAttribute(const QualifiedName & name,const AtomicString & value)898 void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const AtomicString& value)
899 {
900 size_t index = elementData() ? elementData()->attributes().findIndex(name) : kNotFound;
901 setAttributeInternal(index, name, value, InSynchronizationOfLazyAttribute);
902 }
903
setAttributeInternal(size_t index,const QualifiedName & name,const AtomicString & newValue,SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)904 ALWAYS_INLINE void Element::setAttributeInternal(size_t index, const QualifiedName& name, const AtomicString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
905 {
906 if (newValue.isNull()) {
907 if (index != kNotFound)
908 removeAttributeInternal(index, inSynchronizationOfLazyAttribute);
909 return;
910 }
911
912 if (index == kNotFound) {
913 appendAttributeInternal(name, newValue, inSynchronizationOfLazyAttribute);
914 return;
915 }
916
917 const Attribute& existingAttribute = elementData()->attributes().at(index);
918 QualifiedName existingAttributeName = existingAttribute.name();
919
920 if (!inSynchronizationOfLazyAttribute)
921 willModifyAttribute(existingAttributeName, existingAttribute.value(), newValue);
922
923 if (newValue != existingAttribute.value()) {
924 // If there is an Attr node hooked to this attribute, the Attr::setValue() call below
925 // will write into the ElementData.
926 // FIXME: Refactor this so it makes some sense.
927 if (RefPtrWillBeRawPtr<Attr> attrNode = inSynchronizationOfLazyAttribute ? nullptr : attrIfExists(existingAttributeName))
928 attrNode->setValue(newValue);
929 else
930 ensureUniqueElementData().attributes().at(index).setValue(newValue);
931 }
932
933 if (!inSynchronizationOfLazyAttribute)
934 didModifyAttribute(existingAttributeName, newValue);
935 }
936
makeIdForStyleResolution(const AtomicString & value,bool inQuirksMode)937 static inline AtomicString makeIdForStyleResolution(const AtomicString& value, bool inQuirksMode)
938 {
939 if (inQuirksMode)
940 return value.lower();
941 return value;
942 }
943
attributeChanged(const QualifiedName & name,const AtomicString & newValue,AttributeModificationReason reason)944 void Element::attributeChanged(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
945 {
946 if (ElementShadow* parentElementShadow = shadowWhereNodeCanBeDistributed(*this)) {
947 if (shouldInvalidateDistributionWhenAttributeChanged(parentElementShadow, name, newValue))
948 parentElementShadow->setNeedsDistributionRecalc();
949 }
950
951 parseAttribute(name, newValue);
952
953 document().incDOMTreeVersion();
954
955 StyleResolver* styleResolver = document().styleResolver();
956 bool testShouldInvalidateStyle = inActiveDocument() && styleResolver && styleChangeType() < SubtreeStyleChange;
957
958 if (isStyledElement() && name == styleAttr) {
959 styleAttributeChanged(newValue, reason);
960 } else if (isStyledElement() && isPresentationAttribute(name)) {
961 elementData()->m_presentationAttributeStyleIsDirty = true;
962 setNeedsStyleRecalc(LocalStyleChange);
963 }
964
965 if (isIdAttributeName(name)) {
966 AtomicString oldId = elementData()->idForStyleResolution();
967 AtomicString newId = makeIdForStyleResolution(newValue, document().inQuirksMode());
968 if (newId != oldId) {
969 elementData()->setIdForStyleResolution(newId);
970 if (testShouldInvalidateStyle)
971 styleResolver->ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForIdChange(oldId, newId, *this);
972 }
973 } else if (name == classAttr) {
974 classAttributeChanged(newValue);
975 } else if (name == HTMLNames::nameAttr) {
976 setHasName(!newValue.isNull());
977 }
978
979 invalidateNodeListCachesInAncestors(&name, this);
980
981 // If there is currently no StyleResolver, we can't be sure that this attribute change won't affect style.
982 if (!styleResolver)
983 setNeedsStyleRecalc(SubtreeStyleChange);
984
985 if (AXObjectCache* cache = document().existingAXObjectCache())
986 cache->handleAttributeChanged(name, this);
987 }
988
hasLegalLinkAttribute(const QualifiedName &) const989 bool Element::hasLegalLinkAttribute(const QualifiedName&) const
990 {
991 return false;
992 }
993
subResourceAttributeName() const994 const QualifiedName& Element::subResourceAttributeName() const
995 {
996 return QualifiedName::null();
997 }
998
attributeChangedFromParserOrByCloning(const QualifiedName & name,const AtomicString & newValue,AttributeModificationReason reason)999 inline void Element::attributeChangedFromParserOrByCloning(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
1000 {
1001 if (name == isAttr)
1002 CustomElementRegistrationContext::setTypeExtension(this, newValue);
1003 attributeChanged(name, newValue, reason);
1004 }
1005
1006 template <typename CharacterType>
classStringHasClassName(const CharacterType * characters,unsigned length)1007 static inline bool classStringHasClassName(const CharacterType* characters, unsigned length)
1008 {
1009 ASSERT(length > 0);
1010
1011 unsigned i = 0;
1012 do {
1013 if (isNotHTMLSpace<CharacterType>(characters[i]))
1014 break;
1015 ++i;
1016 } while (i < length);
1017
1018 return i < length;
1019 }
1020
classStringHasClassName(const AtomicString & newClassString)1021 static inline bool classStringHasClassName(const AtomicString& newClassString)
1022 {
1023 unsigned length = newClassString.length();
1024
1025 if (!length)
1026 return false;
1027
1028 if (newClassString.is8Bit())
1029 return classStringHasClassName(newClassString.characters8(), length);
1030 return classStringHasClassName(newClassString.characters16(), length);
1031 }
1032
classAttributeChanged(const AtomicString & newClassString)1033 void Element::classAttributeChanged(const AtomicString& newClassString)
1034 {
1035 StyleResolver* styleResolver = document().styleResolver();
1036 bool testShouldInvalidateStyle = inActiveDocument() && styleResolver && styleChangeType() < SubtreeStyleChange;
1037
1038 ASSERT(elementData());
1039 if (classStringHasClassName(newClassString)) {
1040 const bool shouldFoldCase = document().inQuirksMode();
1041 const SpaceSplitString oldClasses = elementData()->classNames();
1042 elementData()->setClass(newClassString, shouldFoldCase);
1043 const SpaceSplitString& newClasses = elementData()->classNames();
1044 if (testShouldInvalidateStyle)
1045 styleResolver->ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForClassChange(oldClasses, newClasses, *this);
1046 } else {
1047 const SpaceSplitString& oldClasses = elementData()->classNames();
1048 if (testShouldInvalidateStyle)
1049 styleResolver->ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForClassChange(oldClasses, *this);
1050 elementData()->clearClass();
1051 }
1052
1053 if (hasRareData())
1054 elementRareData()->clearClassListValueForQuirksMode();
1055 }
1056
shouldInvalidateDistributionWhenAttributeChanged(ElementShadow * elementShadow,const QualifiedName & name,const AtomicString & newValue)1057 bool Element::shouldInvalidateDistributionWhenAttributeChanged(ElementShadow* elementShadow, const QualifiedName& name, const AtomicString& newValue)
1058 {
1059 ASSERT(elementShadow);
1060 const SelectRuleFeatureSet& featureSet = elementShadow->ensureSelectFeatureSet();
1061
1062 if (isIdAttributeName(name)) {
1063 AtomicString oldId = elementData()->idForStyleResolution();
1064 AtomicString newId = makeIdForStyleResolution(newValue, document().inQuirksMode());
1065 if (newId != oldId) {
1066 if (!oldId.isEmpty() && featureSet.hasSelectorForId(oldId))
1067 return true;
1068 if (!newId.isEmpty() && featureSet.hasSelectorForId(newId))
1069 return true;
1070 }
1071 }
1072
1073 if (name == HTMLNames::classAttr) {
1074 const AtomicString& newClassString = newValue;
1075 if (classStringHasClassName(newClassString)) {
1076 const bool shouldFoldCase = document().inQuirksMode();
1077 const SpaceSplitString& oldClasses = elementData()->classNames();
1078 const SpaceSplitString newClasses(newClassString, shouldFoldCase);
1079 if (featureSet.checkSelectorsForClassChange(oldClasses, newClasses))
1080 return true;
1081 } else {
1082 const SpaceSplitString& oldClasses = elementData()->classNames();
1083 if (featureSet.checkSelectorsForClassChange(oldClasses))
1084 return true;
1085 }
1086 }
1087
1088 return featureSet.hasSelectorForAttribute(name.localName());
1089 }
1090
1091 // Returns true is the given attribute is an event handler.
1092 // We consider an event handler any attribute that begins with "on".
1093 // It is a simple solution that has the advantage of not requiring any
1094 // code or configuration change if a new event handler is defined.
1095
isEventHandlerAttribute(const Attribute & attribute)1096 static inline bool isEventHandlerAttribute(const Attribute& attribute)
1097 {
1098 return attribute.name().namespaceURI().isNull() && attribute.name().localName().startsWith("on");
1099 }
1100
isJavaScriptURLAttribute(const Attribute & attribute) const1101 bool Element::isJavaScriptURLAttribute(const Attribute& attribute) const
1102 {
1103 return isURLAttribute(attribute) && protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(attribute.value()));
1104 }
1105
stripScriptingAttributes(Vector<Attribute> & attributeVector) const1106 void Element::stripScriptingAttributes(Vector<Attribute>& attributeVector) const
1107 {
1108 size_t destination = 0;
1109 for (size_t source = 0; source < attributeVector.size(); ++source) {
1110 if (isEventHandlerAttribute(attributeVector[source])
1111 || isJavaScriptURLAttribute(attributeVector[source])
1112 || isHTMLContentAttribute(attributeVector[source]))
1113 continue;
1114
1115 if (source != destination)
1116 attributeVector[destination] = attributeVector[source];
1117
1118 ++destination;
1119 }
1120 attributeVector.shrink(destination);
1121 }
1122
parserSetAttributes(const Vector<Attribute> & attributeVector)1123 void Element::parserSetAttributes(const Vector<Attribute>& attributeVector)
1124 {
1125 ASSERT(!inDocument());
1126 ASSERT(!parentNode());
1127 ASSERT(!m_elementData);
1128
1129 if (attributeVector.isEmpty())
1130 return;
1131
1132 if (document().elementDataCache())
1133 m_elementData = document().elementDataCache()->cachedShareableElementDataWithAttributes(attributeVector);
1134 else
1135 m_elementData = ShareableElementData::createWithAttributes(attributeVector);
1136
1137 // Use attributeVector instead of m_elementData because attributeChanged might modify m_elementData.
1138 for (unsigned i = 0; i < attributeVector.size(); ++i)
1139 attributeChangedFromParserOrByCloning(attributeVector[i].name(), attributeVector[i].value(), ModifiedDirectly);
1140 }
1141
hasEquivalentAttributes(const Element * other) const1142 bool Element::hasEquivalentAttributes(const Element* other) const
1143 {
1144 synchronizeAllAttributes();
1145 other->synchronizeAllAttributes();
1146 if (elementData() == other->elementData())
1147 return true;
1148 if (elementData())
1149 return elementData()->isEquivalent(other->elementData());
1150 if (other->elementData())
1151 return other->elementData()->isEquivalent(elementData());
1152 return true;
1153 }
1154
nodeName() const1155 String Element::nodeName() const
1156 {
1157 return m_tagName.toString();
1158 }
1159
setPrefix(const AtomicString & prefix,ExceptionState & exceptionState)1160 void Element::setPrefix(const AtomicString& prefix, ExceptionState& exceptionState)
1161 {
1162 UseCounter::countDeprecation(document(), UseCounter::ElementSetPrefix);
1163
1164 if (!prefix.isEmpty() && !Document::isValidName(prefix)) {
1165 exceptionState.throwDOMException(InvalidCharacterError, "The prefix '" + prefix + "' is not a valid name.");
1166 return;
1167 }
1168
1169 // FIXME: Raise NamespaceError if prefix is malformed per the Namespaces in XML specification.
1170
1171 const AtomicString& nodeNamespaceURI = namespaceURI();
1172 if (nodeNamespaceURI.isEmpty() && !prefix.isEmpty()) {
1173 exceptionState.throwDOMException(NamespaceError, "No namespace is set, so a namespace prefix may not be set.");
1174 return;
1175 }
1176
1177 if (prefix == xmlAtom && nodeNamespaceURI != XMLNames::xmlNamespaceURI) {
1178 exceptionState.throwDOMException(NamespaceError, "The prefix '" + xmlAtom + "' may not be set on namespace '" + nodeNamespaceURI + "'.");
1179 return;
1180 }
1181
1182 if (exceptionState.hadException())
1183 return;
1184
1185 m_tagName.setPrefix(prefix.isEmpty() ? AtomicString() : prefix);
1186 }
1187
locateNamespacePrefix(const AtomicString & namespaceToLocate) const1188 const AtomicString& Element::locateNamespacePrefix(const AtomicString& namespaceToLocate) const
1189 {
1190 if (!prefix().isNull() && namespaceURI() == namespaceToLocate)
1191 return prefix();
1192
1193 AttributeCollection attributes = this->attributes();
1194 AttributeCollection::iterator end = attributes.end();
1195 for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
1196 if (it->prefix() == xmlnsAtom && it->value() == namespaceToLocate)
1197 return it->localName();
1198 }
1199
1200 if (Element* parent = parentElement())
1201 return parent->locateNamespacePrefix(namespaceToLocate);
1202
1203 return nullAtom;
1204 }
1205
baseURI() const1206 KURL Element::baseURI() const
1207 {
1208 const AtomicString& baseAttribute = fastGetAttribute(baseAttr);
1209 KURL base(KURL(), baseAttribute);
1210 if (!base.protocol().isEmpty())
1211 return base;
1212
1213 ContainerNode* parent = parentNode();
1214 if (!parent)
1215 return base;
1216
1217 const KURL& parentBase = parent->baseURI();
1218 if (parentBase.isNull())
1219 return base;
1220
1221 return KURL(parentBase, baseAttribute);
1222 }
1223
imageSourceURL() const1224 const AtomicString Element::imageSourceURL() const
1225 {
1226 return getAttribute(srcAttr);
1227 }
1228
rendererIsNeeded(const RenderStyle & style)1229 bool Element::rendererIsNeeded(const RenderStyle& style)
1230 {
1231 return style.display() != NONE;
1232 }
1233
createRenderer(RenderStyle * style)1234 RenderObject* Element::createRenderer(RenderStyle* style)
1235 {
1236 return RenderObject::createObject(this, style);
1237 }
1238
insertedInto(ContainerNode * insertionPoint)1239 Node::InsertionNotificationRequest Element::insertedInto(ContainerNode* insertionPoint)
1240 {
1241 // need to do superclass processing first so inDocument() is true
1242 // by the time we reach updateId
1243 ContainerNode::insertedInto(insertionPoint);
1244
1245 if (containsFullScreenElement() && parentElement() && !parentElement()->containsFullScreenElement())
1246 setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(true);
1247
1248 ASSERT(!hasRareData() || !elementRareData()->hasPseudoElements());
1249
1250 if (!insertionPoint->isInTreeScope())
1251 return InsertionDone;
1252
1253 if (hasRareData())
1254 elementRareData()->clearClassListValueForQuirksMode();
1255
1256 if (isUpgradedCustomElement() && inDocument())
1257 CustomElement::didAttach(this, document());
1258
1259 TreeScope& scope = insertionPoint->treeScope();
1260 if (scope != treeScope())
1261 return InsertionDone;
1262
1263 const AtomicString& idValue = getIdAttribute();
1264 if (!idValue.isNull())
1265 updateId(scope, nullAtom, idValue);
1266
1267 const AtomicString& nameValue = getNameAttribute();
1268 if (!nameValue.isNull())
1269 updateName(nullAtom, nameValue);
1270
1271 if (parentElement() && parentElement()->isInCanvasSubtree())
1272 setIsInCanvasSubtree(true);
1273
1274 return InsertionDone;
1275 }
1276
removedFrom(ContainerNode * insertionPoint)1277 void Element::removedFrom(ContainerNode* insertionPoint)
1278 {
1279 bool wasInDocument = insertionPoint->inDocument();
1280
1281 ASSERT(!hasRareData() || !elementRareData()->hasPseudoElements());
1282
1283 if (containsFullScreenElement())
1284 setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(false);
1285
1286 if (Fullscreen* fullscreen = Fullscreen::fromIfExists(document()))
1287 fullscreen->elementRemoved(*this);
1288
1289 if (document().page())
1290 document().page()->pointerLockController().elementRemoved(this);
1291
1292 setSavedLayerScrollOffset(IntSize());
1293
1294 if (insertionPoint->isInTreeScope() && treeScope() == document()) {
1295 const AtomicString& idValue = getIdAttribute();
1296 if (!idValue.isNull())
1297 updateId(insertionPoint->treeScope(), idValue, nullAtom);
1298
1299 const AtomicString& nameValue = getNameAttribute();
1300 if (!nameValue.isNull())
1301 updateName(nameValue, nullAtom);
1302 }
1303
1304 ContainerNode::removedFrom(insertionPoint);
1305 if (wasInDocument) {
1306 if (hasPendingResources())
1307 document().accessSVGExtensions().removeElementFromPendingResources(this);
1308
1309 if (isUpgradedCustomElement())
1310 CustomElement::didDetach(this, insertionPoint->document());
1311 }
1312
1313 document().removeFromTopLayer(this);
1314
1315 clearElementFlag(IsInCanvasSubtree);
1316
1317 if (hasRareData())
1318 elementRareData()->clearRestyleFlags();
1319 }
1320
attach(const AttachContext & context)1321 void Element::attach(const AttachContext& context)
1322 {
1323 ASSERT(document().inStyleRecalc());
1324
1325 // We've already been through detach when doing an attach, but we might
1326 // need to clear any state that's been added since then.
1327 if (hasRareData() && styleChangeType() == NeedsReattachStyleChange) {
1328 ElementRareData* data = elementRareData();
1329 data->clearComputedStyle();
1330 }
1331
1332 RenderTreeBuilder(this, context.resolvedStyle).createRendererForElementIfNeeded();
1333
1334 addCallbackSelectors();
1335
1336 StyleResolverParentScope parentScope(*this);
1337
1338 createPseudoElementIfNeeded(BEFORE);
1339
1340 // When a shadow root exists, it does the work of attaching the children.
1341 if (ElementShadow* shadow = this->shadow())
1342 shadow->attach(context);
1343
1344 ContainerNode::attach(context);
1345
1346 createPseudoElementIfNeeded(AFTER);
1347 createPseudoElementIfNeeded(BACKDROP);
1348
1349 if (hasRareData() && !renderer()) {
1350 if (ActiveAnimations* activeAnimations = elementRareData()->activeAnimations()) {
1351 activeAnimations->cssAnimations().cancel();
1352 activeAnimations->setAnimationStyleChange(false);
1353 }
1354 }
1355 }
1356
detach(const AttachContext & context)1357 void Element::detach(const AttachContext& context)
1358 {
1359 HTMLFrameOwnerElement::UpdateSuspendScope suspendWidgetHierarchyUpdates;
1360 cancelFocusAppearanceUpdate();
1361 removeCallbackSelectors();
1362 if (svgFilterNeedsLayerUpdate())
1363 document().unscheduleSVGFilterLayerUpdateHack(*this);
1364 if (hasRareData()) {
1365 ElementRareData* data = elementRareData();
1366 data->clearPseudoElements();
1367
1368 // attach() will clear the computed style for us when inside recalcStyle.
1369 if (!document().inStyleRecalc())
1370 data->clearComputedStyle();
1371
1372 if (ActiveAnimations* activeAnimations = data->activeAnimations()) {
1373 if (context.performingReattach) {
1374 // FIXME: We call detach from within style recalc, so compositingState is not up to date.
1375 // https://code.google.com/p/chromium/issues/detail?id=339847
1376 DisableCompositingQueryAsserts disabler;
1377
1378 // FIXME: restart compositor animations rather than pull back to the main thread
1379 activeAnimations->cancelAnimationOnCompositor();
1380 } else {
1381 activeAnimations->cssAnimations().cancel();
1382 activeAnimations->setAnimationStyleChange(false);
1383 }
1384 }
1385
1386 if (ElementShadow* shadow = data->shadow())
1387 shadow->detach(context);
1388 }
1389 ContainerNode::detach(context);
1390 }
1391
pseudoStyleCacheIsInvalid(const RenderStyle * currentStyle,RenderStyle * newStyle)1392 bool Element::pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle)
1393 {
1394 ASSERT(currentStyle == renderStyle());
1395 ASSERT(renderer());
1396
1397 if (!currentStyle)
1398 return false;
1399
1400 const PseudoStyleCache* pseudoStyleCache = currentStyle->cachedPseudoStyles();
1401 if (!pseudoStyleCache)
1402 return false;
1403
1404 size_t cacheSize = pseudoStyleCache->size();
1405 for (size_t i = 0; i < cacheSize; ++i) {
1406 RefPtr<RenderStyle> newPseudoStyle;
1407 PseudoId pseudoId = pseudoStyleCache->at(i)->styleType();
1408 if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED)
1409 newPseudoStyle = renderer()->uncachedFirstLineStyle(newStyle);
1410 else
1411 newPseudoStyle = renderer()->getUncachedPseudoStyle(PseudoStyleRequest(pseudoId), newStyle, newStyle);
1412 if (!newPseudoStyle)
1413 return true;
1414 if (*newPseudoStyle != *pseudoStyleCache->at(i)) {
1415 if (pseudoId < FIRST_INTERNAL_PSEUDOID)
1416 newStyle->setHasPseudoStyle(pseudoId);
1417 newStyle->addCachedPseudoStyle(newPseudoStyle);
1418 if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED) {
1419 // FIXME: We should do an actual diff to determine whether a repaint vs. layout
1420 // is needed, but for now just assume a layout will be required. The diff code
1421 // in RenderObject::setStyle would need to be factored out so that it could be reused.
1422 renderer()->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
1423 }
1424 return true;
1425 }
1426 }
1427 return false;
1428 }
1429
styleForRenderer()1430 PassRefPtr<RenderStyle> Element::styleForRenderer()
1431 {
1432 ASSERT(document().inStyleRecalc());
1433
1434 RefPtr<RenderStyle> style;
1435
1436 // FIXME: Instead of clearing updates that may have been added from calls to styleForElement
1437 // outside recalcStyle, we should just never set them if we're not inside recalcStyle.
1438 if (ActiveAnimations* activeAnimations = this->activeAnimations())
1439 activeAnimations->cssAnimations().setPendingUpdate(nullptr);
1440
1441 if (hasCustomStyleCallbacks())
1442 style = customStyleForRenderer();
1443 if (!style)
1444 style = originalStyleForRenderer();
1445 ASSERT(style);
1446
1447 // styleForElement() might add active animations so we need to get it again.
1448 if (ActiveAnimations* activeAnimations = this->activeAnimations()) {
1449 activeAnimations->cssAnimations().maybeApplyPendingUpdate(this);
1450 activeAnimations->updateAnimationFlags(*style);
1451 }
1452
1453 if (style->hasTransform()) {
1454 if (const StylePropertySet* inlineStyle = this->inlineStyle())
1455 style->setHasInlineTransform(inlineStyle->hasProperty(CSSPropertyTransform) || inlineStyle->hasProperty(CSSPropertyWebkitTransform));
1456 }
1457
1458 document().didRecalculateStyleForElement();
1459 return style.release();
1460 }
1461
originalStyleForRenderer()1462 PassRefPtr<RenderStyle> Element::originalStyleForRenderer()
1463 {
1464 ASSERT(document().inStyleRecalc());
1465 return document().ensureStyleResolver().styleForElement(this);
1466 }
1467
recalcStyle(StyleRecalcChange change,Text * nextTextSibling)1468 void Element::recalcStyle(StyleRecalcChange change, Text* nextTextSibling)
1469 {
1470 ASSERT(document().inStyleRecalc());
1471 ASSERT(!parentOrShadowHostNode()->needsStyleRecalc());
1472
1473 if (hasCustomStyleCallbacks())
1474 willRecalcStyle(change);
1475
1476 if (change >= Inherit || needsStyleRecalc()) {
1477 if (hasRareData()) {
1478 ElementRareData* data = elementRareData();
1479 data->clearComputedStyle();
1480
1481 if (change >= Inherit) {
1482 if (ActiveAnimations* activeAnimations = data->activeAnimations())
1483 activeAnimations->setAnimationStyleChange(false);
1484 }
1485 }
1486 if (parentRenderStyle())
1487 change = recalcOwnStyle(change);
1488 clearNeedsStyleRecalc();
1489 }
1490
1491 // If we reattached we don't need to recalc the style of our descendants anymore.
1492 if ((change >= UpdatePseudoElements && change < Reattach) || childNeedsStyleRecalc()) {
1493 StyleResolverParentScope parentScope(*this);
1494
1495 updatePseudoElement(BEFORE, change);
1496
1497 if (change > UpdatePseudoElements || childNeedsStyleRecalc()) {
1498 for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
1499 if (root->shouldCallRecalcStyle(change))
1500 root->recalcStyle(change);
1501 }
1502 recalcChildStyle(change);
1503 }
1504
1505 updatePseudoElement(AFTER, change);
1506 updatePseudoElement(BACKDROP, change);
1507
1508 clearChildNeedsStyleRecalc();
1509 }
1510
1511 if (hasCustomStyleCallbacks())
1512 didRecalcStyle(change);
1513
1514 if (change == Reattach)
1515 reattachWhitespaceSiblings(nextTextSibling);
1516 }
1517
recalcOwnStyle(StyleRecalcChange change)1518 StyleRecalcChange Element::recalcOwnStyle(StyleRecalcChange change)
1519 {
1520 ASSERT(document().inStyleRecalc());
1521 ASSERT(!parentOrShadowHostNode()->needsStyleRecalc());
1522 ASSERT(change >= Inherit || needsStyleRecalc());
1523 ASSERT(parentRenderStyle());
1524
1525 RefPtr<RenderStyle> oldStyle = renderStyle();
1526 RefPtr<RenderStyle> newStyle = styleForRenderer();
1527 StyleRecalcChange localChange = RenderStyle::stylePropagationDiff(oldStyle.get(), newStyle.get());
1528
1529 ASSERT(newStyle);
1530
1531 if (localChange == Reattach) {
1532 AttachContext reattachContext;
1533 reattachContext.resolvedStyle = newStyle.get();
1534 bool rendererWillChange = needsAttach() || renderer();
1535 reattach(reattachContext);
1536 if (rendererWillChange || renderer())
1537 return Reattach;
1538 return ReattachNoRenderer;
1539 }
1540
1541 ASSERT(oldStyle);
1542
1543 if (localChange != NoChange)
1544 updateCallbackSelectors(oldStyle.get(), newStyle.get());
1545
1546 if (RenderObject* renderer = this->renderer()) {
1547 if (localChange != NoChange || pseudoStyleCacheIsInvalid(oldStyle.get(), newStyle.get()) || svgFilterNeedsLayerUpdate()) {
1548 renderer->setStyle(newStyle.get());
1549 } else {
1550 // Although no change occurred, we use the new style so that the cousin style sharing code won't get
1551 // fooled into believing this style is the same.
1552 // FIXME: We may be able to remove this hack, see discussion in
1553 // https://codereview.chromium.org/30453002/
1554 renderer->setStyleInternal(newStyle.get());
1555 }
1556 }
1557
1558 if (styleChangeType() >= SubtreeStyleChange)
1559 return Force;
1560
1561 if (change > Inherit || localChange > Inherit)
1562 return max(localChange, change);
1563
1564 if (localChange < Inherit && (oldStyle->hasPseudoElementStyle() || newStyle->hasPseudoElementStyle()))
1565 return UpdatePseudoElements;
1566
1567 return localChange;
1568 }
1569
updateCallbackSelectors(RenderStyle * oldStyle,RenderStyle * newStyle)1570 void Element::updateCallbackSelectors(RenderStyle* oldStyle, RenderStyle* newStyle)
1571 {
1572 Vector<String> emptyVector;
1573 const Vector<String>& oldCallbackSelectors = oldStyle ? oldStyle->callbackSelectors() : emptyVector;
1574 const Vector<String>& newCallbackSelectors = newStyle ? newStyle->callbackSelectors() : emptyVector;
1575 if (oldCallbackSelectors.isEmpty() && newCallbackSelectors.isEmpty())
1576 return;
1577 if (oldCallbackSelectors != newCallbackSelectors)
1578 CSSSelectorWatch::from(document()).updateSelectorMatches(oldCallbackSelectors, newCallbackSelectors);
1579 }
1580
addCallbackSelectors()1581 void Element::addCallbackSelectors()
1582 {
1583 updateCallbackSelectors(0, renderStyle());
1584 }
1585
removeCallbackSelectors()1586 void Element::removeCallbackSelectors()
1587 {
1588 updateCallbackSelectors(renderStyle(), 0);
1589 }
1590
shadow() const1591 ElementShadow* Element::shadow() const
1592 {
1593 return hasRareData() ? elementRareData()->shadow() : 0;
1594 }
1595
ensureShadow()1596 ElementShadow& Element::ensureShadow()
1597 {
1598 return ensureElementRareData().ensureShadow();
1599 }
1600
pseudoStateChanged(CSSSelector::PseudoType pseudo)1601 void Element::pseudoStateChanged(CSSSelector::PseudoType pseudo)
1602 {
1603 StyleResolver* styleResolver = document().styleResolver();
1604
1605 if (inActiveDocument() && styleResolver && styleChangeType() < SubtreeStyleChange)
1606 styleResolver->ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForPseudoChange(pseudo, *this);
1607
1608 if (ElementShadow* elementShadow = shadowWhereNodeCanBeDistributed(*this))
1609 elementShadow->distributedNodePseudoStateChanged(pseudo);
1610 }
1611
setAnimationStyleChange(bool animationStyleChange)1612 void Element::setAnimationStyleChange(bool animationStyleChange)
1613 {
1614 if (animationStyleChange && document().inStyleRecalc())
1615 return;
1616 if (ActiveAnimations* activeAnimations = elementRareData()->activeAnimations())
1617 activeAnimations->setAnimationStyleChange(animationStyleChange);
1618 }
1619
setNeedsAnimationStyleRecalc()1620 void Element::setNeedsAnimationStyleRecalc()
1621 {
1622 if (styleChangeType() != NoStyleChange)
1623 return;
1624
1625 setNeedsStyleRecalc(LocalStyleChange);
1626 setAnimationStyleChange(true);
1627 }
1628
setNeedsCompositingUpdate()1629 void Element::setNeedsCompositingUpdate()
1630 {
1631 if (!document().isActive())
1632 return;
1633 RenderBoxModelObject* renderer = renderBoxModelObject();
1634 if (!renderer)
1635 return;
1636 if (!renderer->hasLayer())
1637 return;
1638 renderer->layer()->setNeedsCompositingInputsUpdate();
1639 }
1640
setCustomElementDefinition(PassRefPtr<CustomElementDefinition> definition)1641 void Element::setCustomElementDefinition(PassRefPtr<CustomElementDefinition> definition)
1642 {
1643 if (!hasRareData() && !definition)
1644 return;
1645 ASSERT(!customElementDefinition());
1646 ensureElementRareData().setCustomElementDefinition(definition);
1647 }
1648
customElementDefinition() const1649 CustomElementDefinition* Element::customElementDefinition() const
1650 {
1651 if (hasRareData())
1652 return elementRareData()->customElementDefinition();
1653 return 0;
1654 }
1655
createShadowRoot(ExceptionState & exceptionState)1656 PassRefPtrWillBeRawPtr<ShadowRoot> Element::createShadowRoot(ExceptionState& exceptionState)
1657 {
1658 if (alwaysCreateUserAgentShadowRoot())
1659 ensureUserAgentShadowRoot();
1660
1661 // Some elements make assumptions about what kind of renderers they allow
1662 // as children so we can't allow author shadows on them for now. An override
1663 // flag is provided for testing how author shadows interact on these elements.
1664 if (!areAuthorShadowsAllowed() && !RuntimeEnabledFeatures::authorShadowDOMForAnyElementEnabled()) {
1665 exceptionState.throwDOMException(HierarchyRequestError, "Author-created shadow roots are disabled for this element.");
1666 return nullptr;
1667 }
1668
1669 return PassRefPtrWillBeRawPtr<ShadowRoot>(ensureShadow().addShadowRoot(*this, ShadowRoot::AuthorShadowRoot));
1670 }
1671
shadowRoot() const1672 ShadowRoot* Element::shadowRoot() const
1673 {
1674 ElementShadow* elementShadow = shadow();
1675 if (!elementShadow)
1676 return 0;
1677 ShadowRoot* shadowRoot = elementShadow->youngestShadowRoot();
1678 if (shadowRoot->type() == ShadowRoot::AuthorShadowRoot)
1679 return shadowRoot;
1680 return 0;
1681 }
1682
userAgentShadowRoot() const1683 ShadowRoot* Element::userAgentShadowRoot() const
1684 {
1685 if (ElementShadow* elementShadow = shadow()) {
1686 if (ShadowRoot* shadowRoot = elementShadow->oldestShadowRoot()) {
1687 ASSERT(shadowRoot->type() == ShadowRoot::UserAgentShadowRoot);
1688 return shadowRoot;
1689 }
1690 }
1691
1692 return 0;
1693 }
1694
ensureUserAgentShadowRoot()1695 ShadowRoot& Element::ensureUserAgentShadowRoot()
1696 {
1697 if (ShadowRoot* shadowRoot = userAgentShadowRoot())
1698 return *shadowRoot;
1699 ShadowRoot& shadowRoot = ensureShadow().addShadowRoot(*this, ShadowRoot::UserAgentShadowRoot);
1700 didAddUserAgentShadowRoot(shadowRoot);
1701 return shadowRoot;
1702 }
1703
childTypeAllowed(NodeType type) const1704 bool Element::childTypeAllowed(NodeType type) const
1705 {
1706 switch (type) {
1707 case ELEMENT_NODE:
1708 case TEXT_NODE:
1709 case COMMENT_NODE:
1710 case PROCESSING_INSTRUCTION_NODE:
1711 case CDATA_SECTION_NODE:
1712 return true;
1713 default:
1714 break;
1715 }
1716 return false;
1717 }
1718
checkForEmptyStyleChange()1719 void Element::checkForEmptyStyleChange()
1720 {
1721 RenderStyle* style = renderStyle();
1722
1723 if (!style && !styleAffectedByEmpty())
1724 return;
1725 if (styleChangeType() >= SubtreeStyleChange)
1726 return;
1727 if (!inActiveDocument())
1728 return;
1729 if (!document().styleResolver())
1730 return;
1731
1732 if (!style || (styleAffectedByEmpty() && (!style->emptyState() || hasChildren())))
1733 document().styleResolver()->ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForPseudoChange(CSSSelector::PseudoEmpty, *this);
1734 }
1735
childrenChanged(const ChildrenChange & change)1736 void Element::childrenChanged(const ChildrenChange& change)
1737 {
1738 ContainerNode::childrenChanged(change);
1739
1740 checkForEmptyStyleChange();
1741 if (!change.byParser && change.isChildElementChange())
1742 checkForSiblingStyleChanges(change.type == ElementRemoved ? SiblingElementRemoved : SiblingElementInserted, change.siblingBeforeChange, change.siblingAfterChange);
1743
1744 if (ElementShadow* shadow = this->shadow())
1745 shadow->setNeedsDistributionRecalc();
1746 }
1747
finishParsingChildren()1748 void Element::finishParsingChildren()
1749 {
1750 setIsFinishedParsingChildren(true);
1751 checkForEmptyStyleChange();
1752 checkForSiblingStyleChanges(FinishedParsingChildren, lastChild(), nullptr);
1753 }
1754
1755 #ifndef NDEBUG
formatForDebugger(char * buffer,unsigned length) const1756 void Element::formatForDebugger(char* buffer, unsigned length) const
1757 {
1758 StringBuilder result;
1759 String s;
1760
1761 result.append(nodeName());
1762
1763 s = getIdAttribute();
1764 if (s.length() > 0) {
1765 if (result.length() > 0)
1766 result.appendLiteral("; ");
1767 result.appendLiteral("id=");
1768 result.append(s);
1769 }
1770
1771 s = getAttribute(classAttr);
1772 if (s.length() > 0) {
1773 if (result.length() > 0)
1774 result.appendLiteral("; ");
1775 result.appendLiteral("class=");
1776 result.append(s);
1777 }
1778
1779 strncpy(buffer, result.toString().utf8().data(), length - 1);
1780 }
1781 #endif
1782
attrNodeList()1783 WillBeHeapVector<RefPtrWillBeMember<Attr> >* Element::attrNodeList()
1784 {
1785 return hasRareData() ? elementRareData()->attrNodeList() : 0;
1786 }
1787
ensureAttrNodeList()1788 WillBeHeapVector<RefPtrWillBeMember<Attr> >& Element::ensureAttrNodeList()
1789 {
1790 setHasSyntheticAttrChildNodes(true);
1791 return ensureElementRareData().ensureAttrNodeList();
1792 }
1793
removeAttrNodeList()1794 void Element::removeAttrNodeList()
1795 {
1796 ASSERT(hasSyntheticAttrChildNodes());
1797 if (hasRareData())
1798 elementRareData()->removeAttrNodeList();
1799 setHasSyntheticAttrChildNodes(false);
1800 }
1801
setAttributeNode(Attr * attrNode,ExceptionState & exceptionState)1802 PassRefPtrWillBeRawPtr<Attr> Element::setAttributeNode(Attr* attrNode, ExceptionState& exceptionState)
1803 {
1804 if (!attrNode) {
1805 exceptionState.throwDOMException(TypeMismatchError, ExceptionMessages::argumentNullOrIncorrectType(1, "Attr"));
1806 return nullptr;
1807 }
1808
1809 RefPtrWillBeRawPtr<Attr> oldAttrNode = attrIfExists(attrNode->qualifiedName());
1810 if (oldAttrNode.get() == attrNode)
1811 return attrNode; // This Attr is already attached to the element.
1812
1813 // InUseAttributeError: Raised if node is an Attr that is already an attribute of another Element object.
1814 // The DOM user must explicitly clone Attr nodes to re-use them in other elements.
1815 if (attrNode->ownerElement()) {
1816 exceptionState.throwDOMException(InUseAttributeError, "The node provided is an attribute node that is already an attribute of another Element; attribute nodes must be explicitly cloned.");
1817 return nullptr;
1818 }
1819
1820 synchronizeAllAttributes();
1821 const UniqueElementData& elementData = ensureUniqueElementData();
1822
1823 AttributeCollection attributes = elementData.attributes();
1824 size_t index = attributes.findIndex(attrNode->qualifiedName(), shouldIgnoreAttributeCase());
1825 AtomicString localName;
1826 if (index != kNotFound) {
1827 const Attribute& attr = attributes[index];
1828
1829 // If the name of the ElementData attribute doesn't
1830 // (case-sensitively) match that of the Attr node, record it
1831 // on the Attr so that it can correctly resolve the value on
1832 // the Element.
1833 if (!attr.name().matches(attrNode->qualifiedName()))
1834 localName = attr.localName();
1835
1836 if (oldAttrNode) {
1837 detachAttrNodeFromElementWithValue(oldAttrNode.get(), attr.value());
1838 } else {
1839 // FIXME: using attrNode's name rather than the
1840 // Attribute's for the replaced Attr is compatible with
1841 // all but Gecko (and, arguably, the DOM Level1 spec text.)
1842 // Consider switching.
1843 oldAttrNode = Attr::create(document(), attrNode->qualifiedName(), attr.value());
1844 }
1845 }
1846
1847 setAttributeInternal(index, attrNode->qualifiedName(), attrNode->value(), NotInSynchronizationOfLazyAttribute);
1848
1849 attrNode->attachToElement(this, localName);
1850 treeScope().adoptIfNeeded(*attrNode);
1851 ensureAttrNodeList().append(attrNode);
1852
1853 return oldAttrNode.release();
1854 }
1855
setAttributeNodeNS(Attr * attr,ExceptionState & exceptionState)1856 PassRefPtrWillBeRawPtr<Attr> Element::setAttributeNodeNS(Attr* attr, ExceptionState& exceptionState)
1857 {
1858 return setAttributeNode(attr, exceptionState);
1859 }
1860
removeAttributeNode(Attr * attr,ExceptionState & exceptionState)1861 PassRefPtrWillBeRawPtr<Attr> Element::removeAttributeNode(Attr* attr, ExceptionState& exceptionState)
1862 {
1863 if (!attr) {
1864 exceptionState.throwDOMException(TypeMismatchError, ExceptionMessages::argumentNullOrIncorrectType(1, "Attr"));
1865 return nullptr;
1866 }
1867 if (attr->ownerElement() != this) {
1868 exceptionState.throwDOMException(NotFoundError, "The node provided is owned by another element.");
1869 return nullptr;
1870 }
1871
1872 ASSERT(document() == attr->document());
1873
1874 synchronizeAttribute(attr->qualifiedName());
1875
1876 size_t index = elementData()->attributes().findIndex(attr);
1877 if (index == kNotFound) {
1878 exceptionState.throwDOMException(NotFoundError, "The attribute was not found on this element.");
1879 return nullptr;
1880 }
1881
1882 RefPtrWillBeRawPtr<Attr> guard(attr);
1883 detachAttrNodeAtIndex(attr, index);
1884 return guard.release();
1885 }
1886
parseAttribute(const QualifiedName & name,const AtomicString & value)1887 void Element::parseAttribute(const QualifiedName& name, const AtomicString& value)
1888 {
1889 if (name == tabindexAttr) {
1890 int tabindex = 0;
1891 if (value.isEmpty()) {
1892 clearTabIndexExplicitlyIfNeeded();
1893 if (treeScope().adjustedFocusedElement() == this) {
1894 // We might want to call blur(), but it's dangerous to dispatch
1895 // events here.
1896 document().setNeedsFocusedElementCheck();
1897 }
1898 } else if (parseHTMLInteger(value, tabindex)) {
1899 // Clamp tabindex to the range of 'short' to match Firefox's behavior.
1900 setTabIndexExplicitly(max(static_cast<int>(std::numeric_limits<short>::min()), std::min(tabindex, static_cast<int>(std::numeric_limits<short>::max()))));
1901 }
1902 }
1903 }
1904
parseAttributeName(QualifiedName & out,const AtomicString & namespaceURI,const AtomicString & qualifiedName,ExceptionState & exceptionState)1905 bool Element::parseAttributeName(QualifiedName& out, const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState& exceptionState)
1906 {
1907 AtomicString prefix, localName;
1908 if (!Document::parseQualifiedName(qualifiedName, prefix, localName, exceptionState))
1909 return false;
1910 ASSERT(!exceptionState.hadException());
1911
1912 QualifiedName qName(prefix, localName, namespaceURI);
1913
1914 if (!Document::hasValidNamespaceForAttributes(qName)) {
1915 exceptionState.throwDOMException(NamespaceError, "'" + namespaceURI + "' is an invalid namespace for attributes.");
1916 return false;
1917 }
1918
1919 out = qName;
1920 return true;
1921 }
1922
setAttributeNS(const AtomicString & namespaceURI,const AtomicString & qualifiedName,const AtomicString & value,ExceptionState & exceptionState)1923 void Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionState& exceptionState)
1924 {
1925 QualifiedName parsedName = anyName;
1926 if (!parseAttributeName(parsedName, namespaceURI, qualifiedName, exceptionState))
1927 return;
1928 setAttribute(parsedName, value);
1929 }
1930
removeAttributeInternal(size_t index,SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)1931 void Element::removeAttributeInternal(size_t index, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
1932 {
1933 MutableAttributeCollection attributes = ensureUniqueElementData().attributes();
1934 ASSERT_WITH_SECURITY_IMPLICATION(index < attributes.size());
1935
1936 QualifiedName name = attributes[index].name();
1937 AtomicString valueBeingRemoved = attributes[index].value();
1938
1939 if (!inSynchronizationOfLazyAttribute) {
1940 if (!valueBeingRemoved.isNull())
1941 willModifyAttribute(name, valueBeingRemoved, nullAtom);
1942 }
1943
1944 if (RefPtrWillBeRawPtr<Attr> attrNode = attrIfExists(name))
1945 detachAttrNodeFromElementWithValue(attrNode.get(), attributes[index].value());
1946
1947 attributes.remove(index);
1948
1949 if (!inSynchronizationOfLazyAttribute)
1950 didRemoveAttribute(name);
1951 }
1952
appendAttributeInternal(const QualifiedName & name,const AtomicString & value,SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)1953 void Element::appendAttributeInternal(const QualifiedName& name, const AtomicString& value, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
1954 {
1955 if (!inSynchronizationOfLazyAttribute)
1956 willModifyAttribute(name, nullAtom, value);
1957 ensureUniqueElementData().attributes().append(name, value);
1958 if (!inSynchronizationOfLazyAttribute)
1959 didAddAttribute(name, value);
1960 }
1961
removeAttribute(const AtomicString & name)1962 void Element::removeAttribute(const AtomicString& name)
1963 {
1964 if (!elementData())
1965 return;
1966
1967 AtomicString localName = shouldIgnoreAttributeCase() ? name.lower() : name;
1968 size_t index = elementData()->attributes().findIndex(localName, false);
1969 if (index == kNotFound) {
1970 if (UNLIKELY(localName == styleAttr) && elementData()->m_styleAttributeIsDirty && isStyledElement())
1971 removeAllInlineStyleProperties();
1972 return;
1973 }
1974
1975 removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
1976 }
1977
removeAttributeNS(const AtomicString & namespaceURI,const AtomicString & localName)1978 void Element::removeAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName)
1979 {
1980 removeAttribute(QualifiedName(nullAtom, localName, namespaceURI));
1981 }
1982
getAttributeNode(const AtomicString & localName)1983 PassRefPtrWillBeRawPtr<Attr> Element::getAttributeNode(const AtomicString& localName)
1984 {
1985 if (!elementData())
1986 return nullptr;
1987 synchronizeAttribute(localName);
1988 const Attribute* attribute = elementData()->attributes().find(localName, shouldIgnoreAttributeCase());
1989 if (!attribute)
1990 return nullptr;
1991 return ensureAttr(attribute->name());
1992 }
1993
getAttributeNodeNS(const AtomicString & namespaceURI,const AtomicString & localName)1994 PassRefPtrWillBeRawPtr<Attr> Element::getAttributeNodeNS(const AtomicString& namespaceURI, const AtomicString& localName)
1995 {
1996 if (!elementData())
1997 return nullptr;
1998 QualifiedName qName(nullAtom, localName, namespaceURI);
1999 synchronizeAttribute(qName);
2000 const Attribute* attribute = elementData()->attributes().find(qName);
2001 if (!attribute)
2002 return nullptr;
2003 return ensureAttr(attribute->name());
2004 }
2005
hasAttribute(const AtomicString & localName) const2006 bool Element::hasAttribute(const AtomicString& localName) const
2007 {
2008 if (!elementData())
2009 return false;
2010 synchronizeAttribute(localName);
2011 return elementData()->attributes().findIndex(shouldIgnoreAttributeCase() ? localName.lower() : localName, false) != kNotFound;
2012 }
2013
hasAttributeNS(const AtomicString & namespaceURI,const AtomicString & localName) const2014 bool Element::hasAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const
2015 {
2016 if (!elementData())
2017 return false;
2018 QualifiedName qName(nullAtom, localName, namespaceURI);
2019 synchronizeAttribute(qName);
2020 return elementData()->attributes().find(qName);
2021 }
2022
focus(bool restorePreviousSelection,FocusType type)2023 void Element::focus(bool restorePreviousSelection, FocusType type)
2024 {
2025 if (!inDocument())
2026 return;
2027
2028 if (document().focusedElement() == this)
2029 return;
2030
2031 if (!document().isActive())
2032 return;
2033
2034 document().updateLayoutIgnorePendingStylesheets();
2035 if (!isFocusable())
2036 return;
2037
2038 RefPtrWillBeRawPtr<Node> protect(this);
2039 if (!document().page()->focusController().setFocusedElement(this, document().frame(), type))
2040 return;
2041
2042 // Setting the focused node above might have invalidated the layout due to scripts.
2043 document().updateLayoutIgnorePendingStylesheets();
2044 if (!isFocusable())
2045 return;
2046
2047 cancelFocusAppearanceUpdate();
2048 updateFocusAppearance(restorePreviousSelection);
2049
2050 if (UserGestureIndicator::processedUserGestureSinceLoad()) {
2051 // Bring up the keyboard in the context of anything triggered by a user
2052 // gesture. Since tracking that across arbitrary boundaries (eg.
2053 // animations) is difficult, for now we match IE's heuristic and bring
2054 // up the keyboard if there's been any gesture since load.
2055 document().page()->chrome().client().showImeIfNeeded();
2056 }
2057 }
2058
updateFocusAppearance(bool)2059 void Element::updateFocusAppearance(bool /*restorePreviousSelection*/)
2060 {
2061 if (isRootEditableElement()) {
2062 // Taking the ownership since setSelection() may release the last reference to |frame|.
2063 RefPtrWillBeRawPtr<LocalFrame> frame(document().frame());
2064 if (!frame)
2065 return;
2066
2067 // When focusing an editable element in an iframe, don't reset the selection if it already contains a selection.
2068 if (this == frame->selection().rootEditableElement())
2069 return;
2070
2071 // FIXME: We should restore the previous selection if there is one.
2072 VisibleSelection newSelection = VisibleSelection(firstPositionInOrBeforeNode(this), DOWNSTREAM);
2073 // Passing DoNotSetFocus as this function is called after FocusController::setFocusedElement()
2074 // and we don't want to change the focus to a new Element.
2075 frame->selection().setSelection(newSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle | FrameSelection::DoNotSetFocus);
2076 frame->selection().revealSelection();
2077 } else if (renderer() && !renderer()->isWidget())
2078 renderer()->scrollRectToVisible(boundingBox());
2079 }
2080
blur()2081 void Element::blur()
2082 {
2083 cancelFocusAppearanceUpdate();
2084 if (treeScope().adjustedFocusedElement() == this) {
2085 Document& doc = document();
2086 if (doc.page())
2087 doc.page()->focusController().setFocusedElement(0, doc.frame());
2088 else
2089 doc.setFocusedElement(nullptr);
2090 }
2091 }
2092
supportsFocus() const2093 bool Element::supportsFocus() const
2094 {
2095 // FIXME: supportsFocus() can be called when layout is not up to date.
2096 // Logic that deals with the renderer should be moved to rendererIsFocusable().
2097 // But supportsFocus must return true when the element is editable, or else
2098 // it won't be focusable. Furthermore, supportsFocus cannot just return true
2099 // always or else tabIndex() will change for all HTML elements.
2100 return hasElementFlag(TabIndexWasSetExplicitly) || (hasEditableStyle() && parentNode() && !parentNode()->hasEditableStyle())
2101 || supportsSpatialNavigationFocus();
2102 }
2103
supportsSpatialNavigationFocus() const2104 bool Element::supportsSpatialNavigationFocus() const
2105 {
2106 // This function checks whether the element satisfies the extended criteria
2107 // for the element to be focusable, introduced by spatial navigation feature,
2108 // i.e. checks if click or keyboard event handler is specified.
2109 // This is the way to make it possible to navigate to (focus) elements
2110 // which web designer meant for being active (made them respond to click events).
2111
2112 if (!document().settings() || !document().settings()->spatialNavigationEnabled())
2113 return false;
2114 if (hasEventListeners(EventTypeNames::click)
2115 || hasEventListeners(EventTypeNames::keydown)
2116 || hasEventListeners(EventTypeNames::keypress)
2117 || hasEventListeners(EventTypeNames::keyup))
2118 return true;
2119 if (!isSVGElement())
2120 return false;
2121 return (hasEventListeners(EventTypeNames::focus)
2122 || hasEventListeners(EventTypeNames::blur)
2123 || hasEventListeners(EventTypeNames::focusin)
2124 || hasEventListeners(EventTypeNames::focusout));
2125 }
2126
isFocusable() const2127 bool Element::isFocusable() const
2128 {
2129 return inDocument() && supportsFocus() && !isInert() && rendererIsFocusable();
2130 }
2131
isKeyboardFocusable() const2132 bool Element::isKeyboardFocusable() const
2133 {
2134 return isFocusable() && tabIndex() >= 0;
2135 }
2136
isMouseFocusable() const2137 bool Element::isMouseFocusable() const
2138 {
2139 return isFocusable();
2140 }
2141
dispatchFocusEvent(Element * oldFocusedElement,FocusType type)2142 void Element::dispatchFocusEvent(Element* oldFocusedElement, FocusType type)
2143 {
2144 RefPtrWillBeRawPtr<FocusEvent> event = FocusEvent::create(EventTypeNames::focus, false, false, document().domWindow(), 0, oldFocusedElement);
2145 EventDispatcher::dispatchEvent(this, FocusEventDispatchMediator::create(event.release()));
2146 }
2147
dispatchBlurEvent(Element * newFocusedElement)2148 void Element::dispatchBlurEvent(Element* newFocusedElement)
2149 {
2150 RefPtrWillBeRawPtr<FocusEvent> event = FocusEvent::create(EventTypeNames::blur, false, false, document().domWindow(), 0, newFocusedElement);
2151 EventDispatcher::dispatchEvent(this, BlurEventDispatchMediator::create(event.release()));
2152 }
2153
dispatchFocusInEvent(const AtomicString & eventType,Element * oldFocusedElement,FocusType)2154 void Element::dispatchFocusInEvent(const AtomicString& eventType, Element* oldFocusedElement, FocusType)
2155 {
2156 ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden());
2157 ASSERT(eventType == EventTypeNames::focusin || eventType == EventTypeNames::DOMFocusIn);
2158 dispatchScopedEventDispatchMediator(FocusInEventDispatchMediator::create(FocusEvent::create(eventType, true, false, document().domWindow(), 0, oldFocusedElement)));
2159 }
2160
dispatchFocusOutEvent(const AtomicString & eventType,Element * newFocusedElement)2161 void Element::dispatchFocusOutEvent(const AtomicString& eventType, Element* newFocusedElement)
2162 {
2163 ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden());
2164 ASSERT(eventType == EventTypeNames::focusout || eventType == EventTypeNames::DOMFocusOut);
2165 dispatchScopedEventDispatchMediator(FocusOutEventDispatchMediator::create(FocusEvent::create(eventType, true, false, document().domWindow(), 0, newFocusedElement)));
2166 }
2167
innerHTML() const2168 String Element::innerHTML() const
2169 {
2170 return createMarkup(this, ChildrenOnly);
2171 }
2172
outerHTML() const2173 String Element::outerHTML() const
2174 {
2175 return createMarkup(this);
2176 }
2177
setInnerHTML(const String & html,ExceptionState & exceptionState)2178 void Element::setInnerHTML(const String& html, ExceptionState& exceptionState)
2179 {
2180 if (RefPtrWillBeRawPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(html, this, AllowScriptingContent, "innerHTML", exceptionState)) {
2181 ContainerNode* container = this;
2182 if (isHTMLTemplateElement(*this))
2183 container = toHTMLTemplateElement(this)->content();
2184 replaceChildrenWithFragment(container, fragment.release(), exceptionState);
2185 }
2186 }
2187
setOuterHTML(const String & html,ExceptionState & exceptionState)2188 void Element::setOuterHTML(const String& html, ExceptionState& exceptionState)
2189 {
2190 Node* p = parentNode();
2191 if (!p) {
2192 exceptionState.throwDOMException(NoModificationAllowedError, "This element has no parent node.");
2193 return;
2194 }
2195 if (!p->isElementNode()) {
2196 exceptionState.throwDOMException(NoModificationAllowedError, "This element's parent is of type '" + p->nodeName() + "', which is not an element node.");
2197 return;
2198 }
2199
2200 RefPtrWillBeRawPtr<Element> parent = toElement(p);
2201 RefPtrWillBeRawPtr<Node> prev = previousSibling();
2202 RefPtrWillBeRawPtr<Node> next = nextSibling();
2203
2204 RefPtrWillBeRawPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(html, parent.get(), AllowScriptingContent, "outerHTML", exceptionState);
2205 if (exceptionState.hadException())
2206 return;
2207
2208 parent->replaceChild(fragment.release(), this, exceptionState);
2209 RefPtrWillBeRawPtr<Node> node = next ? next->previousSibling() : 0;
2210 if (!exceptionState.hadException() && node && node->isTextNode())
2211 mergeWithNextTextNode(toText(node.get()), exceptionState);
2212
2213 if (!exceptionState.hadException() && prev && prev->isTextNode())
2214 mergeWithNextTextNode(toText(prev.get()), exceptionState);
2215 }
2216
insertAdjacent(const String & where,Node * newChild,ExceptionState & exceptionState)2217 Node* Element::insertAdjacent(const String& where, Node* newChild, ExceptionState& exceptionState)
2218 {
2219 if (equalIgnoringCase(where, "beforeBegin")) {
2220 if (ContainerNode* parent = this->parentNode()) {
2221 parent->insertBefore(newChild, this, exceptionState);
2222 if (!exceptionState.hadException())
2223 return newChild;
2224 }
2225 return 0;
2226 }
2227
2228 if (equalIgnoringCase(where, "afterBegin")) {
2229 insertBefore(newChild, firstChild(), exceptionState);
2230 return exceptionState.hadException() ? 0 : newChild;
2231 }
2232
2233 if (equalIgnoringCase(where, "beforeEnd")) {
2234 appendChild(newChild, exceptionState);
2235 return exceptionState.hadException() ? 0 : newChild;
2236 }
2237
2238 if (equalIgnoringCase(where, "afterEnd")) {
2239 if (ContainerNode* parent = this->parentNode()) {
2240 parent->insertBefore(newChild, nextSibling(), exceptionState);
2241 if (!exceptionState.hadException())
2242 return newChild;
2243 }
2244 return 0;
2245 }
2246
2247 exceptionState.throwDOMException(SyntaxError, "The value provided ('" + where + "') is not one of 'beforeBegin', 'afterBegin', 'beforeEnd', or 'afterEnd'.");
2248 return 0;
2249 }
2250
2251 // Step 1 of http://domparsing.spec.whatwg.org/#insertadjacenthtml()
contextElementForInsertion(const String & where,Element * element,ExceptionState & exceptionState)2252 static Element* contextElementForInsertion(const String& where, Element* element, ExceptionState& exceptionState)
2253 {
2254 if (equalIgnoringCase(where, "beforeBegin") || equalIgnoringCase(where, "afterEnd")) {
2255 Element* parent = element->parentElement();
2256 if (!parent) {
2257 exceptionState.throwDOMException(NoModificationAllowedError, "The element has no parent.");
2258 return 0;
2259 }
2260 return parent;
2261 }
2262 if (equalIgnoringCase(where, "afterBegin") || equalIgnoringCase(where, "beforeEnd"))
2263 return element;
2264 exceptionState.throwDOMException(SyntaxError, "The value provided ('" + where + "') is not one of 'beforeBegin', 'afterBegin', 'beforeEnd', or 'afterEnd'.");
2265 return 0;
2266 }
2267
insertAdjacentElement(const String & where,Element * newChild,ExceptionState & exceptionState)2268 Element* Element::insertAdjacentElement(const String& where, Element* newChild, ExceptionState& exceptionState)
2269 {
2270 if (!newChild) {
2271 // IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative.
2272 exceptionState.throwTypeError("The node provided is null.");
2273 return 0;
2274 }
2275
2276 Node* returnValue = insertAdjacent(where, newChild, exceptionState);
2277 return toElement(returnValue);
2278 }
2279
insertAdjacentText(const String & where,const String & text,ExceptionState & exceptionState)2280 void Element::insertAdjacentText(const String& where, const String& text, ExceptionState& exceptionState)
2281 {
2282 insertAdjacent(where, document().createTextNode(text).get(), exceptionState);
2283 }
2284
insertAdjacentHTML(const String & where,const String & markup,ExceptionState & exceptionState)2285 void Element::insertAdjacentHTML(const String& where, const String& markup, ExceptionState& exceptionState)
2286 {
2287 RefPtrWillBeRawPtr<Element> contextElement = contextElementForInsertion(where, this, exceptionState);
2288 if (!contextElement)
2289 return;
2290
2291 RefPtrWillBeRawPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(markup, contextElement.get(), AllowScriptingContent, "insertAdjacentHTML", exceptionState);
2292 if (!fragment)
2293 return;
2294 insertAdjacent(where, fragment.get(), exceptionState);
2295 }
2296
innerText()2297 String Element::innerText()
2298 {
2299 // We need to update layout, since plainText uses line boxes in the render tree.
2300 document().updateLayoutIgnorePendingStylesheets();
2301
2302 if (!renderer())
2303 return textContent(true);
2304
2305 return plainText(rangeOfContents(const_cast<Element*>(this)).get());
2306 }
2307
outerText()2308 String Element::outerText()
2309 {
2310 // Getting outerText is the same as getting innerText, only
2311 // setting is different. You would think this should get the plain
2312 // text for the outer range, but this is wrong, <br> for instance
2313 // would return different values for inner and outer text by such
2314 // a rule, but it doesn't in WinIE, and we want to match that.
2315 return innerText();
2316 }
2317
textFromChildren()2318 String Element::textFromChildren()
2319 {
2320 Text* firstTextNode = 0;
2321 bool foundMultipleTextNodes = false;
2322 unsigned totalLength = 0;
2323
2324 for (Node* child = firstChild(); child; child = child->nextSibling()) {
2325 if (!child->isTextNode())
2326 continue;
2327 Text* text = toText(child);
2328 if (!firstTextNode)
2329 firstTextNode = text;
2330 else
2331 foundMultipleTextNodes = true;
2332 unsigned length = text->data().length();
2333 if (length > std::numeric_limits<unsigned>::max() - totalLength)
2334 return emptyString();
2335 totalLength += length;
2336 }
2337
2338 if (!firstTextNode)
2339 return emptyString();
2340
2341 if (firstTextNode && !foundMultipleTextNodes) {
2342 firstTextNode->atomize();
2343 return firstTextNode->data();
2344 }
2345
2346 StringBuilder content;
2347 content.reserveCapacity(totalLength);
2348 for (Node* child = firstTextNode; child; child = child->nextSibling()) {
2349 if (!child->isTextNode())
2350 continue;
2351 content.append(toText(child)->data());
2352 }
2353
2354 ASSERT(content.length() == totalLength);
2355 return content.toString();
2356 }
2357
shadowPseudoId() const2358 const AtomicString& Element::shadowPseudoId() const
2359 {
2360 if (ShadowRoot* root = containingShadowRoot()) {
2361 if (root->type() == ShadowRoot::UserAgentShadowRoot)
2362 return fastGetAttribute(pseudoAttr);
2363 }
2364 return nullAtom;
2365 }
2366
setShadowPseudoId(const AtomicString & id)2367 void Element::setShadowPseudoId(const AtomicString& id)
2368 {
2369 ASSERT(CSSSelector::parsePseudoType(id, false) == CSSSelector::PseudoWebKitCustomElement || CSSSelector::parsePseudoType(id, false) == CSSSelector::PseudoUserAgentCustomElement);
2370 setAttribute(pseudoAttr, id);
2371 }
2372
isInDescendantTreeOf(const Element * shadowHost) const2373 bool Element::isInDescendantTreeOf(const Element* shadowHost) const
2374 {
2375 ASSERT(shadowHost);
2376 ASSERT(isShadowHost(shadowHost));
2377
2378 const ShadowRoot* shadowRoot = containingShadowRoot();
2379 while (shadowRoot) {
2380 const Element* ancestorShadowHost = shadowRoot->shadowHost();
2381 if (ancestorShadowHost == shadowHost)
2382 return true;
2383 shadowRoot = ancestorShadowHost->containingShadowRoot();
2384 }
2385 return false;
2386 }
2387
minimumSizeForResizing() const2388 LayoutSize Element::minimumSizeForResizing() const
2389 {
2390 return hasRareData() ? elementRareData()->minimumSizeForResizing() : defaultMinimumSizeForResizing();
2391 }
2392
setMinimumSizeForResizing(const LayoutSize & size)2393 void Element::setMinimumSizeForResizing(const LayoutSize& size)
2394 {
2395 if (!hasRareData() && size == defaultMinimumSizeForResizing())
2396 return;
2397 ensureElementRareData().setMinimumSizeForResizing(size);
2398 }
2399
computedStyle(PseudoId pseudoElementSpecifier)2400 RenderStyle* Element::computedStyle(PseudoId pseudoElementSpecifier)
2401 {
2402 if (PseudoElement* element = pseudoElement(pseudoElementSpecifier))
2403 return element->computedStyle();
2404
2405 if (!inActiveDocument()) {
2406 // FIXME: Try to do better than this. Ensure that styleForElement() works for elements that are not in the
2407 // document tree and figure out when to destroy the computed style for such elements.
2408 return 0;
2409 }
2410
2411 // FIXME: Find and use the renderer from the pseudo element instead of the actual element so that the 'length'
2412 // properties, which are only known by the renderer because it did the layout, will be correct and so that the
2413 // values returned for the ":selection" pseudo-element will be correct.
2414 RenderStyle* elementStyle = renderStyle();
2415 if (!elementStyle) {
2416 ElementRareData& rareData = ensureElementRareData();
2417 if (!rareData.computedStyle())
2418 rareData.setComputedStyle(document().styleForElementIgnoringPendingStylesheets(this));
2419 elementStyle = rareData.computedStyle();
2420 }
2421
2422 if (!pseudoElementSpecifier)
2423 return elementStyle;
2424
2425 if (RenderStyle* pseudoElementStyle = elementStyle->getCachedPseudoStyle(pseudoElementSpecifier))
2426 return pseudoElementStyle;
2427
2428 RefPtr<RenderStyle> result = document().ensureStyleResolver().pseudoStyleForElement(this, PseudoStyleRequest(pseudoElementSpecifier, PseudoStyleRequest::ForComputedStyle), elementStyle);
2429 ASSERT(result);
2430 return elementStyle->addCachedPseudoStyle(result.release());
2431 }
2432
computeInheritedLanguage() const2433 AtomicString Element::computeInheritedLanguage() const
2434 {
2435 const Node* n = this;
2436 AtomicString value;
2437 // The language property is inherited, so we iterate over the parents to find the first language.
2438 do {
2439 if (n->isElementNode()) {
2440 if (const ElementData* elementData = toElement(n)->elementData()) {
2441 AttributeCollection attributes = elementData->attributes();
2442 // Spec: xml:lang takes precedence -- http://www.w3.org/TR/xhtml1/#C_7
2443 if (const Attribute* attribute = attributes.find(XMLNames::langAttr))
2444 value = attribute->value();
2445 else if (const Attribute* attribute = attributes.find(HTMLNames::langAttr))
2446 value = attribute->value();
2447 }
2448 } else if (n->isDocumentNode()) {
2449 // checking the MIME content-language
2450 value = toDocument(n)->contentLanguage();
2451 }
2452
2453 n = n->parentNode();
2454 } while (n && value.isNull());
2455
2456 return value;
2457 }
2458
locale() const2459 Locale& Element::locale() const
2460 {
2461 return document().getCachedLocale(computeInheritedLanguage());
2462 }
2463
cancelFocusAppearanceUpdate()2464 void Element::cancelFocusAppearanceUpdate()
2465 {
2466 if (document().focusedElement() == this)
2467 document().cancelFocusAppearanceUpdate();
2468 }
2469
normalizeAttributes()2470 void Element::normalizeAttributes()
2471 {
2472 if (!hasAttributes())
2473 return;
2474 WillBeHeapVector<RefPtrWillBeMember<Attr> >* attrNodes = attrNodeList();
2475 if (!attrNodes)
2476 return;
2477 // Copy the Attr Vector because Node::normalize() can fire synchronous JS
2478 // events (e.g. DOMSubtreeModified) and a JS listener could add / remove
2479 // attributes while we are iterating.
2480 WillBeHeapVector<RefPtrWillBeMember<Attr> > attrNodesCopy(*attrNodes);
2481 for (size_t i = 0; i < attrNodesCopy.size(); ++i)
2482 attrNodesCopy[i]->normalize();
2483 }
2484
updatePseudoElement(PseudoId pseudoId,StyleRecalcChange change)2485 void Element::updatePseudoElement(PseudoId pseudoId, StyleRecalcChange change)
2486 {
2487 ASSERT(!needsStyleRecalc());
2488 PseudoElement* element = pseudoElement(pseudoId);
2489 if (element && (change == UpdatePseudoElements || element->shouldCallRecalcStyle(change))) {
2490
2491 // Need to clear the cached style if the PseudoElement wants a recalc so it
2492 // computes a new style.
2493 if (element->needsStyleRecalc())
2494 renderer()->style()->removeCachedPseudoStyle(pseudoId);
2495
2496 // PseudoElement styles hang off their parent element's style so if we needed
2497 // a style recalc we should Force one on the pseudo.
2498 // FIXME: We should figure out the right text sibling to pass.
2499 element->recalcStyle(change == UpdatePseudoElements ? Force : change);
2500
2501 // Wait until our parent is not displayed or pseudoElementRendererIsNeeded
2502 // is false, otherwise we could continously create and destroy PseudoElements
2503 // when RenderObject::isChildAllowed on our parent returns false for the
2504 // PseudoElement's renderer for each style recalc.
2505 if (!renderer() || !pseudoElementRendererIsNeeded(renderer()->getCachedPseudoStyle(pseudoId)))
2506 elementRareData()->setPseudoElement(pseudoId, nullptr);
2507 } else if (change >= UpdatePseudoElements) {
2508 createPseudoElementIfNeeded(pseudoId);
2509 }
2510 }
2511
createPseudoElementIfNeeded(PseudoId pseudoId)2512 void Element::createPseudoElementIfNeeded(PseudoId pseudoId)
2513 {
2514 if (isPseudoElement())
2515 return;
2516
2517 // Document::ensureStyleResolver is not inlined and shows up on profiles, avoid it here.
2518 StyleEngine* engine = document().styleEngine();
2519 RefPtrWillBeRawPtr<PseudoElement> element = engine->ensureResolver().createPseudoElementIfNeeded(*this, pseudoId);
2520 if (!element)
2521 return;
2522
2523 if (pseudoId == BACKDROP)
2524 document().addToTopLayer(element.get(), this);
2525 element->insertedInto(this);
2526 element->attach();
2527
2528 InspectorInstrumentation::pseudoElementCreated(element.get());
2529
2530 ensureElementRareData().setPseudoElement(pseudoId, element.release());
2531 }
2532
pseudoElement(PseudoId pseudoId) const2533 PseudoElement* Element::pseudoElement(PseudoId pseudoId) const
2534 {
2535 return hasRareData() ? elementRareData()->pseudoElement(pseudoId) : 0;
2536 }
2537
pseudoElementRenderer(PseudoId pseudoId) const2538 RenderObject* Element::pseudoElementRenderer(PseudoId pseudoId) const
2539 {
2540 if (PseudoElement* element = pseudoElement(pseudoId))
2541 return element->renderer();
2542 return 0;
2543 }
2544
matches(const String & selectors,ExceptionState & exceptionState)2545 bool Element::matches(const String& selectors, ExceptionState& exceptionState)
2546 {
2547 SelectorQuery* selectorQuery = document().selectorQueryCache().add(AtomicString(selectors), document(), exceptionState);
2548 if (!selectorQuery)
2549 return false;
2550 return selectorQuery->matches(*this);
2551 }
2552
classList()2553 DOMTokenList& Element::classList()
2554 {
2555 ElementRareData& rareData = ensureElementRareData();
2556 if (!rareData.classList())
2557 rareData.setClassList(ClassList::create(this));
2558 return *rareData.classList();
2559 }
2560
dataset()2561 DOMStringMap& Element::dataset()
2562 {
2563 ElementRareData& rareData = ensureElementRareData();
2564 if (!rareData.dataset())
2565 rareData.setDataset(DatasetDOMStringMap::create(this));
2566 return *rareData.dataset();
2567 }
2568
hrefURL() const2569 KURL Element::hrefURL() const
2570 {
2571 // FIXME: These all have href() or url(), but no common super class. Why doesn't
2572 // <link> implement URLUtils?
2573 if (isHTMLAnchorElement(*this) || isHTMLAreaElement(*this) || isHTMLLinkElement(*this))
2574 return getURLAttribute(hrefAttr);
2575 if (isSVGAElement(*this))
2576 return getURLAttribute(XLinkNames::hrefAttr);
2577 return KURL();
2578 }
2579
getURLAttribute(const QualifiedName & name) const2580 KURL Element::getURLAttribute(const QualifiedName& name) const
2581 {
2582 #if ENABLE(ASSERT)
2583 if (elementData()) {
2584 if (const Attribute* attribute = attributes().find(name))
2585 ASSERT(isURLAttribute(*attribute));
2586 }
2587 #endif
2588 return document().completeURL(stripLeadingAndTrailingHTMLSpaces(getAttribute(name)));
2589 }
2590
getNonEmptyURLAttribute(const QualifiedName & name) const2591 KURL Element::getNonEmptyURLAttribute(const QualifiedName& name) const
2592 {
2593 #if ENABLE(ASSERT)
2594 if (elementData()) {
2595 if (const Attribute* attribute = attributes().find(name))
2596 ASSERT(isURLAttribute(*attribute));
2597 }
2598 #endif
2599 String value = stripLeadingAndTrailingHTMLSpaces(getAttribute(name));
2600 if (value.isEmpty())
2601 return KURL();
2602 return document().completeURL(value);
2603 }
2604
getIntegralAttribute(const QualifiedName & attributeName) const2605 int Element::getIntegralAttribute(const QualifiedName& attributeName) const
2606 {
2607 return getAttribute(attributeName).toInt();
2608 }
2609
setIntegralAttribute(const QualifiedName & attributeName,int value)2610 void Element::setIntegralAttribute(const QualifiedName& attributeName, int value)
2611 {
2612 setAttribute(attributeName, AtomicString::number(value));
2613 }
2614
setUnsignedIntegralAttribute(const QualifiedName & attributeName,unsigned value)2615 void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
2616 {
2617 // Range restrictions are enforced for unsigned IDL attributes that
2618 // reflect content attributes,
2619 // http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#reflecting-content-attributes-in-idl-attributes
2620 if (value > 0x7fffffffu)
2621 value = 0;
2622 setAttribute(attributeName, AtomicString::number(value));
2623 }
2624
getFloatingPointAttribute(const QualifiedName & attributeName,double fallbackValue) const2625 double Element::getFloatingPointAttribute(const QualifiedName& attributeName, double fallbackValue) const
2626 {
2627 return parseToDoubleForNumberType(getAttribute(attributeName), fallbackValue);
2628 }
2629
setFloatingPointAttribute(const QualifiedName & attributeName,double value)2630 void Element::setFloatingPointAttribute(const QualifiedName& attributeName, double value)
2631 {
2632 setAttribute(attributeName, AtomicString::number(value));
2633 }
2634
setContainsFullScreenElement(bool flag)2635 void Element::setContainsFullScreenElement(bool flag)
2636 {
2637 setElementFlag(ContainsFullScreenElement, flag);
2638 setNeedsStyleRecalc(SubtreeStyleChange);
2639 }
2640
parentCrossingFrameBoundaries(Element * element)2641 static Element* parentCrossingFrameBoundaries(Element* element)
2642 {
2643 ASSERT(element);
2644 return element->parentElement() ? element->parentElement() : element->document().ownerElement();
2645 }
2646
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool flag)2647 void Element::setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool flag)
2648 {
2649 for (Element* element = parentCrossingFrameBoundaries(this); element; element = parentCrossingFrameBoundaries(element))
2650 element->setContainsFullScreenElement(flag);
2651 }
2652
setIsInTopLayer(bool inTopLayer)2653 void Element::setIsInTopLayer(bool inTopLayer)
2654 {
2655 if (isInTopLayer() == inTopLayer)
2656 return;
2657 setElementFlag(IsInTopLayer, inTopLayer);
2658
2659 // We must ensure a reattach occurs so the renderer is inserted in the correct sibling order under RenderView according to its
2660 // top layer position, or in its usual place if not in the top layer.
2661 lazyReattachIfAttached();
2662 }
2663
requestPointerLock()2664 void Element::requestPointerLock()
2665 {
2666 if (document().page())
2667 document().page()->pointerLockController().requestPointerLock(this);
2668 }
2669
spellcheckAttributeState() const2670 SpellcheckAttributeState Element::spellcheckAttributeState() const
2671 {
2672 const AtomicString& value = fastGetAttribute(spellcheckAttr);
2673 if (value == nullAtom)
2674 return SpellcheckAttributeDefault;
2675 if (equalIgnoringCase(value, "true") || equalIgnoringCase(value, ""))
2676 return SpellcheckAttributeTrue;
2677 if (equalIgnoringCase(value, "false"))
2678 return SpellcheckAttributeFalse;
2679
2680 return SpellcheckAttributeDefault;
2681 }
2682
isSpellCheckingEnabled() const2683 bool Element::isSpellCheckingEnabled() const
2684 {
2685 for (const Element* element = this; element; element = element->parentOrShadowHostElement()) {
2686 switch (element->spellcheckAttributeState()) {
2687 case SpellcheckAttributeTrue:
2688 return true;
2689 case SpellcheckAttributeFalse:
2690 return false;
2691 case SpellcheckAttributeDefault:
2692 break;
2693 }
2694 }
2695
2696 return true;
2697 }
2698
2699 #if ENABLE(ASSERT)
fastAttributeLookupAllowed(const QualifiedName & name) const2700 bool Element::fastAttributeLookupAllowed(const QualifiedName& name) const
2701 {
2702 if (name == HTMLNames::styleAttr)
2703 return false;
2704
2705 if (isSVGElement())
2706 return !toSVGElement(this)->isAnimatableAttribute(name);
2707
2708 return true;
2709 }
2710 #endif
2711
2712 #ifdef DUMP_NODE_STATISTICS
hasNamedNodeMap() const2713 bool Element::hasNamedNodeMap() const
2714 {
2715 return hasRareData() && elementRareData()->attributeMap();
2716 }
2717 #endif
2718
updateName(const AtomicString & oldName,const AtomicString & newName)2719 inline void Element::updateName(const AtomicString& oldName, const AtomicString& newName)
2720 {
2721 if (!inDocument() || isInShadowTree())
2722 return;
2723
2724 if (oldName == newName)
2725 return;
2726
2727 if (shouldRegisterAsNamedItem())
2728 updateNamedItemRegistration(oldName, newName);
2729 }
2730
updateId(const AtomicString & oldId,const AtomicString & newId)2731 inline void Element::updateId(const AtomicString& oldId, const AtomicString& newId)
2732 {
2733 if (!isInTreeScope())
2734 return;
2735
2736 if (oldId == newId)
2737 return;
2738
2739 updateId(treeScope(), oldId, newId);
2740 }
2741
updateId(TreeScope & scope,const AtomicString & oldId,const AtomicString & newId)2742 inline void Element::updateId(TreeScope& scope, const AtomicString& oldId, const AtomicString& newId)
2743 {
2744 ASSERT(isInTreeScope());
2745 ASSERT(oldId != newId);
2746
2747 if (!oldId.isEmpty())
2748 scope.removeElementById(oldId, this);
2749 if (!newId.isEmpty())
2750 scope.addElementById(newId, this);
2751
2752 if (shouldRegisterAsExtraNamedItem())
2753 updateExtraNamedItemRegistration(oldId, newId);
2754 }
2755
willModifyAttribute(const QualifiedName & name,const AtomicString & oldValue,const AtomicString & newValue)2756 void Element::willModifyAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue)
2757 {
2758 if (isIdAttributeName(name)) {
2759 updateId(oldValue, newValue);
2760 } else if (name == HTMLNames::nameAttr) {
2761 updateName(oldValue, newValue);
2762 }
2763
2764 if (oldValue != newValue) {
2765 if (inActiveDocument() && document().styleResolver() && styleChangeType() < SubtreeStyleChange)
2766 document().ensureStyleResolver().ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForAttributeChange(name, *this);
2767
2768 if (isUpgradedCustomElement())
2769 CustomElement::attributeDidChange(this, name.localName(), oldValue, newValue);
2770 }
2771
2772 if (OwnPtrWillBeRawPtr<MutationObserverInterestGroup> recipients = MutationObserverInterestGroup::createForAttributesMutation(*this, name))
2773 recipients->enqueueMutationRecord(MutationRecord::createAttributes(this, name, oldValue));
2774
2775 attributeWillChange(name, oldValue, newValue);
2776
2777 InspectorInstrumentation::willModifyDOMAttr(this, oldValue, newValue);
2778 }
2779
didAddAttribute(const QualifiedName & name,const AtomicString & value)2780 void Element::didAddAttribute(const QualifiedName& name, const AtomicString& value)
2781 {
2782 attributeChanged(name, value);
2783 InspectorInstrumentation::didModifyDOMAttr(this, name.localName(), value);
2784 dispatchSubtreeModifiedEvent();
2785 }
2786
didModifyAttribute(const QualifiedName & name,const AtomicString & value)2787 void Element::didModifyAttribute(const QualifiedName& name, const AtomicString& value)
2788 {
2789 attributeChanged(name, value);
2790 InspectorInstrumentation::didModifyDOMAttr(this, name.localName(), value);
2791 // Do not dispatch a DOMSubtreeModified event here; see bug 81141.
2792 }
2793
didRemoveAttribute(const QualifiedName & name)2794 void Element::didRemoveAttribute(const QualifiedName& name)
2795 {
2796 attributeChanged(name, nullAtom);
2797 InspectorInstrumentation::didRemoveDOMAttr(this, name.localName());
2798 dispatchSubtreeModifiedEvent();
2799 }
2800
needsURLResolutionForInlineStyle(const Element & element,const Document & oldDocument,const Document & newDocument)2801 static bool needsURLResolutionForInlineStyle(const Element& element, const Document& oldDocument, const Document& newDocument)
2802 {
2803 if (oldDocument == newDocument)
2804 return false;
2805 if (oldDocument.baseURL() == newDocument.baseURL())
2806 return false;
2807 const StylePropertySet* style = element.inlineStyle();
2808 if (!style)
2809 return false;
2810 for (unsigned i = 0; i < style->propertyCount(); ++i) {
2811 // FIXME: Should handle all URL-based properties: CSSImageSetValue, CSSCursorImageValue, etc.
2812 if (style->propertyAt(i).value()->isImageValue())
2813 return true;
2814 }
2815 return false;
2816 }
2817
reResolveURLsInInlineStyle(const Document & document,MutableStylePropertySet & style)2818 static void reResolveURLsInInlineStyle(const Document& document, MutableStylePropertySet& style)
2819 {
2820 for (unsigned i = 0; i < style.propertyCount(); ++i) {
2821 StylePropertySet::PropertyReference property = style.propertyAt(i);
2822 // FIXME: Should handle all URL-based properties: CSSImageSetValue, CSSCursorImageValue, etc.
2823 if (property.value()->isImageValue())
2824 toCSSImageValue(property.value())->reResolveURL(document);
2825 }
2826 }
2827
didMoveToNewDocument(Document & oldDocument)2828 void Element::didMoveToNewDocument(Document& oldDocument)
2829 {
2830 Node::didMoveToNewDocument(oldDocument);
2831
2832 // If the documents differ by quirks mode then they differ by case sensitivity
2833 // for class and id names so we need to go through the attribute change logic
2834 // to pick up the new casing in the ElementData.
2835 if (oldDocument.inQuirksMode() != document().inQuirksMode()) {
2836 if (hasID())
2837 setIdAttribute(getIdAttribute());
2838 if (hasClass())
2839 setAttribute(HTMLNames::classAttr, getClassAttribute());
2840 }
2841
2842 if (needsURLResolutionForInlineStyle(*this, oldDocument, document()))
2843 reResolveURLsInInlineStyle(document(), ensureMutableInlineStyle());
2844 }
2845
updateNamedItemRegistration(const AtomicString & oldName,const AtomicString & newName)2846 void Element::updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName)
2847 {
2848 if (!document().isHTMLDocument())
2849 return;
2850
2851 if (!oldName.isEmpty())
2852 toHTMLDocument(document()).removeNamedItem(oldName);
2853
2854 if (!newName.isEmpty())
2855 toHTMLDocument(document()).addNamedItem(newName);
2856 }
2857
updateExtraNamedItemRegistration(const AtomicString & oldId,const AtomicString & newId)2858 void Element::updateExtraNamedItemRegistration(const AtomicString& oldId, const AtomicString& newId)
2859 {
2860 if (!document().isHTMLDocument())
2861 return;
2862
2863 if (!oldId.isEmpty())
2864 toHTMLDocument(document()).removeExtraNamedItem(oldId);
2865
2866 if (!newId.isEmpty())
2867 toHTMLDocument(document()).addExtraNamedItem(newId);
2868 }
2869
scheduleSVGFilterLayerUpdateHack()2870 void Element::scheduleSVGFilterLayerUpdateHack()
2871 {
2872 document().scheduleSVGFilterLayerUpdateHack(*this);
2873 }
2874
savedLayerScrollOffset() const2875 IntSize Element::savedLayerScrollOffset() const
2876 {
2877 return hasRareData() ? elementRareData()->savedLayerScrollOffset() : IntSize();
2878 }
2879
setSavedLayerScrollOffset(const IntSize & size)2880 void Element::setSavedLayerScrollOffset(const IntSize& size)
2881 {
2882 if (size.isZero() && !hasRareData())
2883 return;
2884 ensureElementRareData().setSavedLayerScrollOffset(size);
2885 }
2886
attrIfExists(const QualifiedName & name)2887 PassRefPtrWillBeRawPtr<Attr> Element::attrIfExists(const QualifiedName& name)
2888 {
2889 if (AttrNodeList* attrNodeList = this->attrNodeList())
2890 return findAttrNodeInList(*attrNodeList, name);
2891 return nullptr;
2892 }
2893
ensureAttr(const QualifiedName & name)2894 PassRefPtrWillBeRawPtr<Attr> Element::ensureAttr(const QualifiedName& name)
2895 {
2896 AttrNodeList& attrNodeList = ensureAttrNodeList();
2897 RefPtrWillBeRawPtr<Attr> attrNode = findAttrNodeInList(attrNodeList, name);
2898 if (!attrNode) {
2899 attrNode = Attr::create(*this, name);
2900 treeScope().adoptIfNeeded(*attrNode);
2901 attrNodeList.append(attrNode);
2902 }
2903 return attrNode.release();
2904 }
2905
detachAttrNodeFromElementWithValue(Attr * attrNode,const AtomicString & value)2906 void Element::detachAttrNodeFromElementWithValue(Attr* attrNode, const AtomicString& value)
2907 {
2908 ASSERT(hasSyntheticAttrChildNodes());
2909 attrNode->detachFromElementWithValue(value);
2910
2911 AttrNodeList* list = attrNodeList();
2912 for (unsigned i = 0; i < list->size(); ++i) {
2913 if (list->at(i)->qualifiedName() == attrNode->qualifiedName()) {
2914 list->remove(i);
2915 if (list->isEmpty())
2916 removeAttrNodeList();
2917 return;
2918 }
2919 }
2920 ASSERT_NOT_REACHED();
2921 }
2922
detachAllAttrNodesFromElement()2923 void Element::detachAllAttrNodesFromElement()
2924 {
2925 AttrNodeList* list = this->attrNodeList();
2926 ASSERT(list);
2927
2928 AttributeCollection attributes = elementData()->attributes();
2929 AttributeCollection::iterator end = attributes.end();
2930 for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) {
2931 if (RefPtrWillBeRawPtr<Attr> attrNode = findAttrNodeInList(*list, it->name()))
2932 attrNode->detachFromElementWithValue(it->value());
2933 }
2934
2935 removeAttrNodeList();
2936 }
2937
willRecalcStyle(StyleRecalcChange)2938 void Element::willRecalcStyle(StyleRecalcChange)
2939 {
2940 ASSERT(hasCustomStyleCallbacks());
2941 }
2942
didRecalcStyle(StyleRecalcChange)2943 void Element::didRecalcStyle(StyleRecalcChange)
2944 {
2945 ASSERT(hasCustomStyleCallbacks());
2946 }
2947
2948
customStyleForRenderer()2949 PassRefPtr<RenderStyle> Element::customStyleForRenderer()
2950 {
2951 ASSERT(hasCustomStyleCallbacks());
2952 return nullptr;
2953 }
2954
cloneAttributesFromElement(const Element & other)2955 void Element::cloneAttributesFromElement(const Element& other)
2956 {
2957 if (hasSyntheticAttrChildNodes())
2958 detachAllAttrNodesFromElement();
2959
2960 other.synchronizeAllAttributes();
2961 if (!other.m_elementData) {
2962 m_elementData.clear();
2963 return;
2964 }
2965
2966 const AtomicString& oldID = getIdAttribute();
2967 const AtomicString& newID = other.getIdAttribute();
2968
2969 if (!oldID.isNull() || !newID.isNull())
2970 updateId(oldID, newID);
2971
2972 const AtomicString& oldName = getNameAttribute();
2973 const AtomicString& newName = other.getNameAttribute();
2974
2975 if (!oldName.isNull() || !newName.isNull())
2976 updateName(oldName, newName);
2977
2978 // Quirks mode makes class and id not case sensitive. We can't share the ElementData
2979 // if the idForStyleResolution and the className need different casing.
2980 bool ownerDocumentsHaveDifferentCaseSensitivity = false;
2981 if (other.hasClass() || other.hasID())
2982 ownerDocumentsHaveDifferentCaseSensitivity = other.document().inQuirksMode() != document().inQuirksMode();
2983
2984 // If 'other' has a mutable ElementData, convert it to an immutable one so we can share it between both elements.
2985 // We can only do this if there are no presentation attributes and sharing the data won't result in different case sensitivity of class or id.
2986 if (other.m_elementData->isUnique()
2987 && !ownerDocumentsHaveDifferentCaseSensitivity
2988 && !other.m_elementData->presentationAttributeStyle())
2989 const_cast<Element&>(other).m_elementData = toUniqueElementData(other.m_elementData)->makeShareableCopy();
2990
2991 if (!other.m_elementData->isUnique() && !ownerDocumentsHaveDifferentCaseSensitivity && !needsURLResolutionForInlineStyle(other, other.document(), document()))
2992 m_elementData = other.m_elementData;
2993 else
2994 m_elementData = other.m_elementData->makeUniqueCopy();
2995
2996 AttributeCollection attributes = m_elementData->attributes();
2997 AttributeCollection::iterator end = attributes.end();
2998 for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it)
2999 attributeChangedFromParserOrByCloning(it->name(), it->value(), ModifiedByCloning);
3000 }
3001
cloneDataFromElement(const Element & other)3002 void Element::cloneDataFromElement(const Element& other)
3003 {
3004 cloneAttributesFromElement(other);
3005 copyNonAttributePropertiesFromElement(other);
3006 }
3007
createUniqueElementData()3008 void Element::createUniqueElementData()
3009 {
3010 if (!m_elementData)
3011 m_elementData = UniqueElementData::create();
3012 else {
3013 ASSERT(!m_elementData->isUnique());
3014 m_elementData = toShareableElementData(m_elementData)->makeUniqueCopy();
3015 }
3016 }
3017
inputMethodContext()3018 InputMethodContext& Element::inputMethodContext()
3019 {
3020 return ensureElementRareData().ensureInputMethodContext(toHTMLElement(this));
3021 }
3022
hasInputMethodContext() const3023 bool Element::hasInputMethodContext() const
3024 {
3025 return hasRareData() && elementRareData()->hasInputMethodContext();
3026 }
3027
synchronizeStyleAttributeInternal() const3028 void Element::synchronizeStyleAttributeInternal() const
3029 {
3030 ASSERT(isStyledElement());
3031 ASSERT(elementData());
3032 ASSERT(elementData()->m_styleAttributeIsDirty);
3033 elementData()->m_styleAttributeIsDirty = false;
3034 const StylePropertySet* inlineStyle = this->inlineStyle();
3035 const_cast<Element*>(this)->setSynchronizedLazyAttribute(styleAttr,
3036 inlineStyle ? AtomicString(inlineStyle->asText()) : nullAtom);
3037 }
3038
style()3039 CSSStyleDeclaration* Element::style()
3040 {
3041 if (!isStyledElement())
3042 return 0;
3043 return &ensureElementRareData().ensureInlineCSSStyleDeclaration(this);
3044 }
3045
ensureMutableInlineStyle()3046 MutableStylePropertySet& Element::ensureMutableInlineStyle()
3047 {
3048 ASSERT(isStyledElement());
3049 RefPtrWillBeMember<StylePropertySet>& inlineStyle = ensureUniqueElementData().m_inlineStyle;
3050 if (!inlineStyle) {
3051 CSSParserMode mode = (!isHTMLElement() || document().inQuirksMode()) ? HTMLQuirksMode : HTMLStandardMode;
3052 inlineStyle = MutableStylePropertySet::create(mode);
3053 } else if (!inlineStyle->isMutable()) {
3054 inlineStyle = inlineStyle->mutableCopy();
3055 }
3056 return *toMutableStylePropertySet(inlineStyle);
3057 }
3058
clearMutableInlineStyleIfEmpty()3059 void Element::clearMutableInlineStyleIfEmpty()
3060 {
3061 if (ensureMutableInlineStyle().isEmpty()) {
3062 ensureUniqueElementData().m_inlineStyle.clear();
3063 }
3064 }
3065
setInlineStyleFromString(const AtomicString & newStyleString)3066 inline void Element::setInlineStyleFromString(const AtomicString& newStyleString)
3067 {
3068 ASSERT(isStyledElement());
3069 RefPtrWillBeMember<StylePropertySet>& inlineStyle = elementData()->m_inlineStyle;
3070
3071 // Avoid redundant work if we're using shared attribute data with already parsed inline style.
3072 if (inlineStyle && !elementData()->isUnique())
3073 return;
3074
3075 // We reconstruct the property set instead of mutating if there is no CSSOM wrapper.
3076 // This makes wrapperless property sets immutable and so cacheable.
3077 if (inlineStyle && !inlineStyle->isMutable())
3078 inlineStyle.clear();
3079
3080 if (!inlineStyle) {
3081 inlineStyle = CSSParser::parseInlineStyleDeclaration(newStyleString, this);
3082 } else {
3083 ASSERT(inlineStyle->isMutable());
3084 static_cast<MutableStylePropertySet*>(inlineStyle.get())->parseDeclaration(newStyleString, document().elementSheet().contents());
3085 }
3086 }
3087
styleAttributeChanged(const AtomicString & newStyleString,AttributeModificationReason modificationReason)3088 void Element::styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason modificationReason)
3089 {
3090 ASSERT(isStyledElement());
3091 WTF::OrdinalNumber startLineNumber = WTF::OrdinalNumber::beforeFirst();
3092 if (document().scriptableDocumentParser() && !document().isInDocumentWrite())
3093 startLineNumber = document().scriptableDocumentParser()->lineNumber();
3094
3095 if (newStyleString.isNull()) {
3096 ensureUniqueElementData().m_inlineStyle.clear();
3097 } else if (modificationReason == ModifiedByCloning || document().contentSecurityPolicy()->allowInlineStyle(document().url(), startLineNumber)) {
3098 setInlineStyleFromString(newStyleString);
3099 }
3100
3101 elementData()->m_styleAttributeIsDirty = false;
3102
3103 setNeedsStyleRecalc(LocalStyleChange);
3104 InspectorInstrumentation::didInvalidateStyleAttr(this);
3105 }
3106
inlineStyleChanged()3107 void Element::inlineStyleChanged()
3108 {
3109 ASSERT(isStyledElement());
3110 setNeedsStyleRecalc(LocalStyleChange);
3111 ASSERT(elementData());
3112 elementData()->m_styleAttributeIsDirty = true;
3113 InspectorInstrumentation::didInvalidateStyleAttr(this);
3114 }
3115
setInlineStyleProperty(CSSPropertyID propertyID,CSSValueID identifier,bool important)3116 bool Element::setInlineStyleProperty(CSSPropertyID propertyID, CSSValueID identifier, bool important)
3117 {
3118 ASSERT(isStyledElement());
3119 ensureMutableInlineStyle().setProperty(propertyID, cssValuePool().createIdentifierValue(identifier), important);
3120 inlineStyleChanged();
3121 return true;
3122 }
3123
setInlineStyleProperty(CSSPropertyID propertyID,double value,CSSPrimitiveValue::UnitType unit,bool important)3124 bool Element::setInlineStyleProperty(CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitType unit, bool important)
3125 {
3126 ASSERT(isStyledElement());
3127 ensureMutableInlineStyle().setProperty(propertyID, cssValuePool().createValue(value, unit), important);
3128 inlineStyleChanged();
3129 return true;
3130 }
3131
setInlineStyleProperty(CSSPropertyID propertyID,const String & value,bool important)3132 bool Element::setInlineStyleProperty(CSSPropertyID propertyID, const String& value, bool important)
3133 {
3134 ASSERT(isStyledElement());
3135 bool changes = ensureMutableInlineStyle().setProperty(propertyID, value, important, document().elementSheet().contents());
3136 if (changes)
3137 inlineStyleChanged();
3138 return changes;
3139 }
3140
removeInlineStyleProperty(CSSPropertyID propertyID)3141 bool Element::removeInlineStyleProperty(CSSPropertyID propertyID)
3142 {
3143 ASSERT(isStyledElement());
3144 if (!inlineStyle())
3145 return false;
3146 bool changes = ensureMutableInlineStyle().removeProperty(propertyID);
3147 if (changes)
3148 inlineStyleChanged();
3149 return changes;
3150 }
3151
removeAllInlineStyleProperties()3152 void Element::removeAllInlineStyleProperties()
3153 {
3154 ASSERT(isStyledElement());
3155 if (!inlineStyle())
3156 return;
3157 ensureMutableInlineStyle().clear();
3158 inlineStyleChanged();
3159 }
3160
updatePresentationAttributeStyle()3161 void Element::updatePresentationAttributeStyle()
3162 {
3163 synchronizeAllAttributes();
3164 // ShareableElementData doesn't store presentation attribute style, so make sure we have a UniqueElementData.
3165 UniqueElementData& elementData = ensureUniqueElementData();
3166 elementData.m_presentationAttributeStyleIsDirty = false;
3167 elementData.m_presentationAttributeStyle = computePresentationAttributeStyle(*this);
3168 }
3169
addPropertyToPresentationAttributeStyle(MutableStylePropertySet * style,CSSPropertyID propertyID,CSSValueID identifier)3170 void Element::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, CSSValueID identifier)
3171 {
3172 ASSERT(isStyledElement());
3173 style->setProperty(propertyID, cssValuePool().createIdentifierValue(identifier));
3174 }
3175
addPropertyToPresentationAttributeStyle(MutableStylePropertySet * style,CSSPropertyID propertyID,double value,CSSPrimitiveValue::UnitType unit)3176 void Element::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitType unit)
3177 {
3178 ASSERT(isStyledElement());
3179 style->setProperty(propertyID, cssValuePool().createValue(value, unit));
3180 }
3181
addPropertyToPresentationAttributeStyle(MutableStylePropertySet * style,CSSPropertyID propertyID,const String & value)3182 void Element::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, const String& value)
3183 {
3184 ASSERT(isStyledElement());
3185 style->setProperty(propertyID, value, false);
3186 }
3187
supportsStyleSharing() const3188 bool Element::supportsStyleSharing() const
3189 {
3190 if (!isStyledElement() || !parentOrShadowHostElement())
3191 return false;
3192 // If the element has inline style it is probably unique.
3193 if (inlineStyle())
3194 return false;
3195 if (isSVGElement() && toSVGElement(this)->animatedSMILStyleProperties())
3196 return false;
3197 // Ids stop style sharing if they show up in the stylesheets.
3198 if (hasID() && document().ensureStyleResolver().hasRulesForId(idForStyleResolution()))
3199 return false;
3200 // :active and :hover elements always make a chain towards the document node
3201 // and no siblings or cousins will have the same state. There's also only one
3202 // :focus element per scope so we don't need to attempt to share.
3203 if (isUserActionElement())
3204 return false;
3205 if (!parentOrShadowHostElement()->childrenSupportStyleSharing())
3206 return false;
3207 if (this == document().cssTarget())
3208 return false;
3209 if (isHTMLElement() && toHTMLElement(this)->hasDirectionAuto())
3210 return false;
3211 if (hasActiveAnimations())
3212 return false;
3213 // Turn off style sharing for elements that can gain layers for reasons outside of the style system.
3214 // See comments in RenderObject::setStyle().
3215 // FIXME: Why does gaining a layer from outside the style system require disabling sharing?
3216 if (isHTMLFrameElementBase(*this) || isHTMLPlugInElement(*this) || isHTMLCanvasElement(*this))
3217 return false;
3218 if (Fullscreen::isActiveFullScreenElement(*this))
3219 return false;
3220 return true;
3221 }
3222
trace(Visitor * visitor)3223 void Element::trace(Visitor* visitor)
3224 {
3225 #if ENABLE(OILPAN)
3226 if (hasRareData())
3227 visitor->trace(elementRareData());
3228 visitor->trace(m_elementData);
3229 #endif
3230 ContainerNode::trace(visitor);
3231 }
3232
wrap(v8::Handle<v8::Object> creationContext,v8::Isolate * isolate)3233 v8::Handle<v8::Object> Element::wrap(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
3234 {
3235 if (isCustomElement())
3236 return wrapCustomElement(creationContext, isolate);
3237 return ContainerNode::wrap(creationContext, isolate);
3238 }
3239
wrapCustomElement(v8::Handle<v8::Object> creationContext,v8::Isolate * isolate)3240 v8::Handle<v8::Object> Element::wrapCustomElement(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
3241 {
3242 // It's possible that no one except for the new wrapper owns this object at
3243 // this moment, so we have to prevent GC to collect this object until the
3244 // object gets associated with the wrapper.
3245 RefPtrWillBeRawPtr<Element> protect(this);
3246
3247 ASSERT(!DOMDataStore::containsWrapperNonTemplate(this, isolate));
3248
3249 ASSERT(!creationContext.IsEmpty());
3250 v8::Handle<v8::Context> context = creationContext->CreationContext();
3251
3252 if (!isUpgradedCustomElement() || DOMWrapperWorld::world(context).isIsolatedWorld())
3253 return ContainerNode::wrap(creationContext, isolate);
3254
3255 V8PerContextData* perContextData = V8PerContextData::from(context);
3256 if (!perContextData)
3257 return v8::Handle<v8::Object>();
3258
3259 CustomElementBinding* binding = perContextData->customElementBinding(customElementDefinition());
3260 const WrapperTypeInfo* wrapperType = wrapperTypeInfo();
3261 v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, wrapperType, toScriptWrappableBase(), isolate);
3262 if (wrapper.IsEmpty())
3263 return v8::Handle<v8::Object>();
3264
3265 wrapper->SetPrototype(binding->prototype());
3266
3267 return V8DOMWrapper::associateObjectWithWrapperNonTemplate(this, wrapperType, wrapper, isolate);
3268 }
3269
3270 } // namespace blink
3271