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/HTMLShadowElement.h" 33 34 #include "core/HTMLNames.h" 35 #include "core/dom/shadow/ShadowRoot.h" 36 37 namespace WebCore { 38 39 class Document; 40 41 inline HTMLShadowElement::HTMLShadowElement(Document& document) 42 : InsertionPoint(HTMLNames::shadowTag, document) 43 { 44 ScriptWrappable::init(this); 45 } 46 47 DEFINE_NODE_FACTORY(HTMLShadowElement) 48 49 HTMLShadowElement::~HTMLShadowElement() 50 { 51 } 52 53 ShadowRoot* HTMLShadowElement::olderShadowRoot() 54 { 55 ShadowRoot* containingRoot = containingShadowRoot(); 56 if (!containingRoot) 57 return 0; 58 59 document().updateDistributionForNodeIfNeeded(this); 60 61 ShadowRoot* older = containingRoot->olderShadowRoot(); 62 if (!older || !older->shouldExposeToBindings() || older->shadowInsertionPointOfYoungerShadowRoot() != this) 63 return 0; 64 65 ASSERT(older->shouldExposeToBindings()); 66 return older; 67 } 68 69 Node::InsertionNotificationRequest HTMLShadowElement::insertedInto(ContainerNode* insertionPoint) 70 { 71 if (insertionPoint->inDocument()) { 72 // Warn if trying to reproject between user agent and author shadows. 73 ShadowRoot* root = containingShadowRoot(); 74 if (root && root->olderShadowRoot() && root->type() != root->olderShadowRoot()->type()) { 75 String message = String::format("<shadow> doesn't work for %s element host.", root->host()->tagName().utf8().data()); 76 document().addConsoleMessage(RenderingMessageSource, WarningMessageLevel, message); 77 } 78 } 79 return InsertionPoint::insertedInto(insertionPoint); 80 } 81 82 } // namespace WebCore 83 84