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| 1 /* | |
| 2 * Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org> | |
| 3 * Copyright (C) Research In Motion Limited 2010. All rights reserved. | |
| 4 * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved. | |
| 5 * | |
| 6 * This library is free software; you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU Library General Public | |
| 8 * License as published by the Free Software Foundation; either | |
| 9 * version 2 of the License, or (at your option) any later version. | |
| 10 * | |
| 11 * This library is distributed in the hope that it will be useful, | |
| 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * Library General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU Library General Public License | |
| 17 * along with this library; see the file COPYING.LIB. If not, write to | |
| 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 19 * Boston, MA 02110-1301, USA. | |
| 20 */ | |
| 21 | |
| 22 #include "config.h" | |
| 23 | |
| 24 #include "core/svg/SVGElementInstance.h" | |
| 25 | |
| 26 #include "core/dom/ContainerNodeAlgorithms.h" | |
| 27 #include "core/events/Event.h" | |
| 28 #include "core/events/EventListener.h" | |
| 29 #include "core/svg/SVGElement.h" | |
| 30 #include "core/svg/SVGUseElement.h" | |
| 31 | |
| 32 #include "wtf/RefCountedLeakCounter.h" | |
| 33 | |
| 34 namespace WebCore { | |
| 35 | |
| 36 DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, instanceCounter, ("WebCoreS
VGElementInstance")); | |
| 37 | |
| 38 PassRefPtrWillBeRawPtr<SVGElementInstance> SVGElementInstance::create(SVGUseElem
ent* correspondingUseElement, SVGUseElement* directUseElement, PassRefPtrWillBeR
awPtr<SVGElement> originalElement) | |
| 39 { | |
| 40 return adoptRefWillBeRefCountedGarbageCollected(new SVGElementInstance(corre
spondingUseElement, directUseElement, originalElement)); | |
| 41 } | |
| 42 | |
| 43 SVGElementInstance::SVGElementInstance(SVGUseElement* correspondingUseElement, S
VGUseElement* directUseElement, PassRefPtrWillBeRawPtr<SVGElement> originalEleme
nt) | |
| 44 : m_parentInstance(nullptr) | |
| 45 , m_correspondingUseElement(correspondingUseElement) | |
| 46 , m_directUseElement(directUseElement) | |
| 47 , m_element(originalElement) | |
| 48 , m_previousSibling(nullptr) | |
| 49 , m_nextSibling(nullptr) | |
| 50 , m_firstChild(nullptr) | |
| 51 , m_lastChild(nullptr) | |
| 52 { | |
| 53 ASSERT(m_correspondingUseElement); | |
| 54 ASSERT(m_element); | |
| 55 ScriptWrappable::init(this); | |
| 56 | |
| 57 #ifndef NDEBUG | |
| 58 instanceCounter.increment(); | |
| 59 #endif | |
| 60 } | |
| 61 | |
| 62 SVGElementInstance::~SVGElementInstance() | |
| 63 { | |
| 64 #ifndef NDEBUG | |
| 65 instanceCounter.decrement(); | |
| 66 #endif | |
| 67 | |
| 68 #if !ENABLE(OILPAN) | |
| 69 // Call detach because we may be deleted directly if we are a child of a det
ached instance. | |
| 70 detach(); | |
| 71 m_element = nullptr; | |
| 72 #endif | |
| 73 } | |
| 74 | |
| 75 // It's important not to inline removedLastRef, because we don't want to inline
the code to | |
| 76 // delete an SVGElementInstance at each deref call site. | |
| 77 #if !ENABLE(OILPAN) | |
| 78 void SVGElementInstance::removedLastRef() | |
| 79 { | |
| 80 #if SECURITY_ASSERT_ENABLED | |
| 81 m_deletionHasBegun = true; | |
| 82 #endif | |
| 83 delete this; | |
| 84 } | |
| 85 #endif | |
| 86 | |
| 87 void SVGElementInstance::detach() | |
| 88 { | |
| 89 // Clear all pointers. When the node is detached from the shadow DOM it shou
ld be removed but, | |
| 90 // due to ref counting, it may not be. So clear everything to avoid dangling
pointers. | |
| 91 | |
| 92 for (SVGElementInstance* node = firstChild(); node; node = node->nextSibling
()) | |
| 93 node->detach(); | |
| 94 | |
| 95 // Deregister as instance for passed element, if we haven't already. | |
| 96 if (shadowTreeElement() && m_element->instancesForElement().contains(shadowT
reeElement())) | |
| 97 m_element->removeInstanceMapping(shadowTreeElement()); | |
| 98 | |
| 99 m_shadowTreeElement = nullptr; | |
| 100 | |
| 101 m_directUseElement = nullptr; | |
| 102 m_correspondingUseElement = nullptr; | |
| 103 | |
| 104 #if !ENABLE(OILPAN) | |
| 105 removeDetachedChildrenInContainer<SVGElementInstance, SVGElementInstance>(*t
his); | |
| 106 #endif | |
| 107 } | |
| 108 | |
| 109 void SVGElementInstance::setShadowTreeElement(SVGElement* element) | |
| 110 { | |
| 111 ASSERT(element); | |
| 112 m_shadowTreeElement = element; | |
| 113 // Register as instance for passed element. | |
| 114 m_element->mapInstanceToElement(shadowTreeElement()); | |
| 115 | |
| 116 } | |
| 117 | |
| 118 void SVGElementInstance::appendChild(PassRefPtrWillBeRawPtr<SVGElementInstance>
child) | |
| 119 { | |
| 120 appendChildToContainer<SVGElementInstance, SVGElementInstance>(*child, *this
); | |
| 121 } | |
| 122 | |
| 123 void SVGElementInstance::trace(Visitor* visitor) | |
| 124 { | |
| 125 visitor->trace(m_parentInstance); | |
| 126 visitor->trace(m_correspondingUseElement); | |
| 127 visitor->trace(m_directUseElement); | |
| 128 visitor->trace(m_element); | |
| 129 visitor->trace(m_shadowTreeElement); | |
| 130 visitor->trace(m_previousSibling); | |
| 131 visitor->trace(m_nextSibling); | |
| 132 visitor->trace(m_firstChild); | |
| 133 visitor->trace(m_lastChild); | |
| 134 } | |
| 135 | |
| 136 } | |
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Chromium Code Reviews
Issue 272523002:
Remove SVGElementInstance (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master