1 /* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "core/html/shadow/HTMLShadowElement.h" 33 34 #include "HTMLNames.h" 35 #include "core/dom/shadow/ShadowRoot.h" 36 37 namespace WebCore { 38 39 class Document; 40 41 inline HTMLShadowElement::HTMLShadowElement(const QualifiedName& tagName, Document* document) 42 : InsertionPoint(tagName, document) 43 { 44 ASSERT(hasTagName(HTMLNames::shadowTag)); 45 ScriptWrappable::init(this); 46 } 47 48 PassRefPtr<HTMLShadowElement> HTMLShadowElement::create(const QualifiedName& tagName, Document* document) 49 { 50 return adoptRef(new HTMLShadowElement(tagName, document)); 51 } 52 53 HTMLShadowElement::~HTMLShadowElement() 54 { 55 } 56 57 ShadowRoot* HTMLShadowElement::olderShadowRoot() 58 { 59 ShadowRoot* containingRoot = containingShadowRoot(); 60 if (!containingRoot) 61 return 0; 62 63 document()->updateDistributionForNodeIfNeeded(this); 64 65 ShadowRoot* older = containingRoot->olderShadowRoot(); 66 if (!older || !older->shouldExposeToBindings() || older->insertionPoint() != this) 67 return 0; 68 69 ASSERT(older->shouldExposeToBindings()); 70 return older; 71 } 72 73 static inline Element* hostForOldestAuthorShadowRoot(ShadowRoot* root) 74 { 75 return root && root->isOldestAuthorShadowRoot() ? root->host() : 0; 76 } 77 78 bool HTMLShadowElement::shouldSelect() const 79 { 80 Element* host = hostForOldestAuthorShadowRoot(containingShadowRoot()); 81 return !host || host->supportsShadowElementForUserAgentShadow(); 82 } 83 84 Node::InsertionNotificationRequest HTMLShadowElement::insertedInto(ContainerNode* insertionPoint) 85 { 86 if (insertionPoint->inDocument() && !shouldSelect()) { 87 String message = String::format("<shadow> doesn't work for %s element host.", containingShadowRoot()->host()->nodeName().utf8().data()); 88 document()->addConsoleMessage(RenderingMessageSource, WarningMessageLevel, message); 89 } 90 return InsertionPoint::insertedInto(insertionPoint); 91 } 92 93 } // namespace WebCore 94 95