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| 1 /* | |
| 2 * Copyright (C) 2013 Adobe Systems Inc. All rights reserved. | |
| 3 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 4 * Copyright (C) 2011 Apple Inc. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * | |
| 15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include "core/layout/svg/ReferenceFilterBuilder.h" | |
| 29 | |
| 30 #include "core/dom/Element.h" | |
| 31 #include "core/fetch/DocumentResource.h" | |
| 32 #include "core/style/FilterOperation.h" | |
| 33 #include "core/svg/SVGDocumentExtensions.h" | |
| 34 #include "core/svg/SVGFilterElement.h" | |
| 35 | |
| 36 namespace blink { | |
| 37 | |
| 38 namespace { | |
| 39 | |
| 40 using ResourceReferenceMap = | |
| 41 PersistentHeapHashMap<WeakMember<const FilterOperation>, | |
| 42 Member<DocumentResourceReference>>; | |
| 43 | |
| 44 ResourceReferenceMap& documentResourceReferences() { | |
| 45 DEFINE_STATIC_LOCAL(ResourceReferenceMap, documentResourceReferences, ()); | |
| 46 return documentResourceReferences; | |
| 47 } | |
| 48 | |
| 49 } // namespace | |
| 50 | |
| 51 DocumentResourceReference* ReferenceFilterBuilder::documentResourceReference( | |
| 52 const FilterOperation* filterOperation) { | |
| 53 return documentResourceReferences().get(filterOperation); | |
| 54 } | |
| 55 | |
| 56 void ReferenceFilterBuilder::setDocumentResourceReference( | |
| 57 const FilterOperation* filterOperation, | |
| 58 DocumentResourceReference* documentResourceReference) { | |
| 59 ASSERT(!documentResourceReferences().contains(filterOperation)); | |
| 60 documentResourceReferences().add(filterOperation, documentResourceReference); | |
| 61 } | |
| 62 | |
| 63 SVGFilterElement* ReferenceFilterBuilder::resolveFilterReference( | |
| 64 const ReferenceFilterOperation& filterOperation, | |
| 65 Element& element) { | |
| 66 TreeScope* treeScope = &element.treeScope(); | |
| 67 | |
| 68 if (DocumentResourceReference* documentResourceRef = | |
| 69 documentResourceReference(&filterOperation)) { | |
| 70 // If we have an SVG document, this is an external reference. Otherwise | |
| 71 // we look up the referenced node in the current document. | |
| 72 if (DocumentResource* cachedSVGDocument = documentResourceRef->document()) | |
| 73 treeScope = cachedSVGDocument->document(); | |
| 74 } | |
| 75 | |
| 76 if (!treeScope) | |
| 77 return nullptr; | |
| 78 | |
| 79 Element* filter = treeScope->getElementById(filterOperation.fragment()); | |
| 80 | |
| 81 if (!filter) { | |
| 82 // Although we did not find the referenced filter, it might exist later | |
| 83 // in the document. | |
| 84 treeScope->document().accessSVGExtensions().addPendingResource( | |
| 85 filterOperation.fragment(), &element); | |
| 86 return nullptr; | |
| 87 } | |
| 88 | |
| 89 if (!isSVGFilterElement(*filter)) | |
| 90 return nullptr; | |
| 91 | |
| 92 return toSVGFilterElement(filter); | |
| 93 } | |
| 94 | |
| 95 } // namespace blink | |
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Chromium Code Reviews
Issue 2490163002:
Reland of "Tracking reference filter mutation via SVGElementProxy" (Closed)
