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comparison: dom/smil/nsSMILTargetIdentifier.h
dom/smil/nsSMILTargetIdentifier.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef NS_SMILTARGETIDENTIFIER_H_ | |
| 7 #define NS_SMILTARGETIDENTIFIER_H_ | |
| 8 | |
| 9 #include "mozilla/dom/Element.h" | |
| 10 #include "nsAutoPtr.h" | |
| 11 | |
| 12 /** | |
| 13 * Struct: nsSMILTargetIdentifier | |
| 14 * | |
| 15 * Tuple of: { Animated Element, Attribute Name, Attribute Type (CSS vs. XML) } | |
| 16 * | |
| 17 * Used in nsSMILAnimationController as hash key for mapping an animation | |
| 18 * target to the nsSMILCompositor for that target. | |
| 19 * | |
| 20 * NOTE: Need a nsRefPtr for the element & attribute name, because | |
| 21 * nsSMILAnimationController retain its hash table for one sample into the | |
| 22 * future, and we need to make sure their target isn't deleted in that time. | |
| 23 */ | |
| 24 | |
| 25 struct nsSMILTargetIdentifier | |
| 26 { | |
| 27 nsSMILTargetIdentifier() | |
| 28 : mElement(nullptr), mAttributeName(nullptr), | |
| 29 mAttributeNamespaceID(kNameSpaceID_Unknown), mIsCSS(false) {} | |
| 30 | |
| 31 inline bool Equals(const nsSMILTargetIdentifier& aOther) const | |
| 32 { | |
| 33 return (aOther.mElement == mElement && | |
| 34 aOther.mAttributeName == mAttributeName && | |
| 35 aOther.mAttributeNamespaceID == mAttributeNamespaceID && | |
| 36 aOther.mIsCSS == mIsCSS); | |
| 37 } | |
| 38 | |
| 39 nsRefPtr<mozilla::dom::Element> mElement; | |
| 40 nsRefPtr<nsIAtom> mAttributeName; | |
| 41 int32_t mAttributeNamespaceID; | |
| 42 bool mIsCSS; | |
| 43 }; | |
| 44 | |
| 45 /** | |
| 46 * Class: nsSMILWeakTargetIdentifier | |
| 47 * | |
| 48 * Version of the above struct that uses non-owning pointers. These are kept | |
| 49 * private, to ensure that they aren't ever dereferenced (or used at all, | |
| 50 * outside of Equals()). | |
| 51 * | |
| 52 * This is solely for comparisons to determine if a target has changed | |
| 53 * from one sample to the next. | |
| 54 */ | |
| 55 class nsSMILWeakTargetIdentifier | |
| 56 { | |
| 57 public: | |
| 58 // Trivial constructor | |
| 59 nsSMILWeakTargetIdentifier() | |
| 60 : mElement(nullptr), mAttributeName(nullptr), mIsCSS(false) {} | |
| 61 | |
| 62 // Allow us to update a weak identifier to match a given non-weak identifier | |
| 63 nsSMILWeakTargetIdentifier& | |
| 64 operator=(const nsSMILTargetIdentifier& aOther) | |
| 65 { | |
| 66 mElement = aOther.mElement; | |
| 67 mAttributeName = aOther.mAttributeName; | |
| 68 mIsCSS = aOther.mIsCSS; | |
| 69 return *this; | |
| 70 } | |
| 71 | |
| 72 // Allow for comparison vs. non-weak identifier | |
| 73 inline bool Equals(const nsSMILTargetIdentifier& aOther) const | |
| 74 { | |
| 75 return (aOther.mElement == mElement && | |
| 76 aOther.mAttributeName == mAttributeName && | |
| 77 aOther.mIsCSS == mIsCSS); | |
| 78 } | |
| 79 | |
| 80 private: | |
| 81 const nsIContent* mElement; | |
| 82 const nsIAtom* mAttributeName; | |
| 83 bool mIsCSS; | |
| 84 }; | |
| 85 | |
| 86 #endif // NS_SMILTARGETIDENTIFIER_H_ |
