1 /* 2 * Copyright (C) 2007, 2008, 2009 Apple 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "JSStyleSheet.h" 28 29 #include "CSSStyleSheet.h" 30 #include "Node.h" 31 #include "JSCSSStyleSheet.h" 32 #include "JSNode.h" 33 34 using namespace JSC; 35 36 namespace WebCore { 37 38 JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, StyleSheet* styleSheet) 39 { 40 if (!styleSheet) 41 return jsNull(); 42 43 DOMObject* wrapper = getCachedDOMObjectWrapper(exec, styleSheet); 44 if (wrapper) 45 return wrapper; 46 47 if (styleSheet->isCSSStyleSheet()) 48 wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, CSSStyleSheet, styleSheet); 49 else 50 wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, StyleSheet, styleSheet); 51 52 return wrapper; 53 } 54 55 void JSStyleSheet::markChildren(MarkStack& markStack) 56 { 57 Base::markChildren(markStack); 58 59 StyleSheet* sheet = impl(); 60 JSGlobalData& globalData = *Heap::heap(this)->globalData(); 61 62 unsigned length = sheet->length(); 63 for (unsigned i = 0; i < length; ++i) 64 markDOMObjectWrapper(markStack, globalData, sheet->item(i)); 65 66 // This prevents us from having a style sheet with a dangling ownerNode pointer. 67 // A better solution would be to handle this on the DOM side -- if the style sheet 68 // is kept around, then we want the node to stay around too. One possibility would 69 // be to make ref/deref on the style sheet ref/deref the node instead, but there's 70 // a lot of disentangling of the CSS DOM objects that would need to happen first. 71 if (Node* ownerNode = sheet->ownerNode()) 72 markDOMNodeWrapper(markStack, ownerNode->document(), ownerNode); 73 } 74 75 } // namespace WebCore 76
