The Tor Browser / file comparison
comparison: accessible/src/base/nsAccCache.h
accessible/src/base/nsAccCache.h
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:f70cd93f9d86 |
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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 _nsAccCache_H_ | |
| 7 #define _nsAccCache_H_ | |
| 8 | |
| 9 #include "nsIAccessible.h" | |
| 10 #include "nsRefPtrHashtable.h" | |
| 11 #include "nsCycleCollectionParticipant.h" | |
| 12 | |
| 13 //////////////////////////////////////////////////////////////////////////////// | |
| 14 // Accessible cache utils | |
| 15 //////////////////////////////////////////////////////////////////////////////// | |
| 16 | |
| 17 /** | |
| 18 * Shutdown and removes the accessible from cache. | |
| 19 */ | |
| 20 template <class T> | |
| 21 static PLDHashOperator | |
| 22 ClearCacheEntry(const void* aKey, nsRefPtr<T>& aAccessible, void* aUserArg) | |
| 23 { | |
| 24 NS_ASSERTION(aAccessible, "Calling ClearCacheEntry with a nullptr pointer!"); | |
| 25 if (aAccessible) | |
| 26 aAccessible->Shutdown(); | |
| 27 | |
| 28 return PL_DHASH_REMOVE; | |
| 29 } | |
| 30 | |
| 31 /** | |
| 32 * Clear the cache and shutdown the accessibles. | |
| 33 */ | |
| 34 | |
| 35 static void | |
| 36 ClearCache(mozilla::a11y::AccessibleHashtable& aCache) | |
| 37 { | |
| 38 aCache.Enumerate(ClearCacheEntry<mozilla::a11y::Accessible>, nullptr); | |
| 39 } | |
| 40 | |
| 41 /** | |
| 42 * Traverse the accessible cache entry for cycle collector. | |
| 43 */ | |
| 44 template <class T> | |
| 45 static PLDHashOperator | |
| 46 CycleCollectorTraverseCacheEntry(const void *aKey, T *aAccessible, | |
| 47 void *aUserArg) | |
| 48 { | |
| 49 nsCycleCollectionTraversalCallback *cb = | |
| 50 static_cast<nsCycleCollectionTraversalCallback*>(aUserArg); | |
| 51 | |
| 52 NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb, "accessible cache entry"); | |
| 53 | |
| 54 nsISupports *supports = static_cast<nsIAccessible*>(aAccessible); | |
| 55 cb->NoteXPCOMChild(supports); | |
| 56 return PL_DHASH_NEXT; | |
| 57 } | |
| 58 | |
| 59 /** | |
| 60 * Unlink the accessible cache for the cycle collector. | |
| 61 */ | |
| 62 inline void | |
| 63 ImplCycleCollectionUnlink(mozilla::a11y::AccessibleHashtable& aCache) | |
| 64 { | |
| 65 ClearCache(aCache); | |
| 66 } | |
| 67 | |
| 68 /** | |
| 69 * Traverse the accessible cache for cycle collector. | |
| 70 */ | |
| 71 inline void | |
| 72 ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback, | |
| 73 mozilla::a11y::AccessibleHashtable& aCache, | |
| 74 const char* aName, | |
| 75 uint32_t aFlags = 0) | |
| 76 { | |
| 77 aCache.EnumerateRead(CycleCollectorTraverseCacheEntry<mozilla::a11y::Accessible>, | |
| 78 &aCallback); | |
| 79 } | |
| 80 | |
| 81 #endif |
