accessible/src/base/nsAccCache.h@6474c204b198 (annotated)
accessible/src/base/nsAccCache.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef _nsAccCache_H_ |
| michael@0 | 7 | #define _nsAccCache_H_ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "nsIAccessible.h" |
| michael@0 | 10 | #include "nsRefPtrHashtable.h" |
| michael@0 | 11 | #include "nsCycleCollectionParticipant.h" |
| michael@0 | 12 | |
| michael@0 | 13 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 14 | // Accessible cache utils |
| michael@0 | 15 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 16 | |
| michael@0 | 17 | /** |
| michael@0 | 18 | * Shutdown and removes the accessible from cache. |
| michael@0 | 19 | */ |
| michael@0 | 20 | template <class T> |
| michael@0 | 21 | static PLDHashOperator |
| michael@0 | 22 | ClearCacheEntry(const void* aKey, nsRefPtr<T>& aAccessible, void* aUserArg) |
| michael@0 | 23 | { |
| michael@0 | 24 | NS_ASSERTION(aAccessible, "Calling ClearCacheEntry with a nullptr pointer!"); |
| michael@0 | 25 | if (aAccessible) |
| michael@0 | 26 | aAccessible->Shutdown(); |
| michael@0 | 27 | |
| michael@0 | 28 | return PL_DHASH_REMOVE; |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | /** |
| michael@0 | 32 | * Clear the cache and shutdown the accessibles. |
| michael@0 | 33 | */ |
| michael@0 | 34 | |
| michael@0 | 35 | static void |
| michael@0 | 36 | ClearCache(mozilla::a11y::AccessibleHashtable& aCache) |
| michael@0 | 37 | { |
| michael@0 | 38 | aCache.Enumerate(ClearCacheEntry<mozilla::a11y::Accessible>, nullptr); |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | /** |
| michael@0 | 42 | * Traverse the accessible cache entry for cycle collector. |
| michael@0 | 43 | */ |
| michael@0 | 44 | template <class T> |
| michael@0 | 45 | static PLDHashOperator |
| michael@0 | 46 | CycleCollectorTraverseCacheEntry(const void *aKey, T *aAccessible, |
| michael@0 | 47 | void *aUserArg) |
| michael@0 | 48 | { |
| michael@0 | 49 | nsCycleCollectionTraversalCallback *cb = |
| michael@0 | 50 | static_cast<nsCycleCollectionTraversalCallback*>(aUserArg); |
| michael@0 | 51 | |
| michael@0 | 52 | NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb, "accessible cache entry"); |
| michael@0 | 53 | |
| michael@0 | 54 | nsISupports *supports = static_cast<nsIAccessible*>(aAccessible); |
| michael@0 | 55 | cb->NoteXPCOMChild(supports); |
| michael@0 | 56 | return PL_DHASH_NEXT; |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | /** |
| michael@0 | 60 | * Unlink the accessible cache for the cycle collector. |
| michael@0 | 61 | */ |
| michael@0 | 62 | inline void |
| michael@0 | 63 | ImplCycleCollectionUnlink(mozilla::a11y::AccessibleHashtable& aCache) |
| michael@0 | 64 | { |
| michael@0 | 65 | ClearCache(aCache); |
| michael@0 | 66 | } |
| michael@0 | 67 | |
| michael@0 | 68 | /** |
| michael@0 | 69 | * Traverse the accessible cache for cycle collector. |
| michael@0 | 70 | */ |
| michael@0 | 71 | inline void |
| michael@0 | 72 | ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback, |
| michael@0 | 73 | mozilla::a11y::AccessibleHashtable& aCache, |
| michael@0 | 74 | const char* aName, |
| michael@0 | 75 | uint32_t aFlags = 0) |
| michael@0 | 76 | { |
| michael@0 | 77 | aCache.EnumerateRead(CycleCollectorTraverseCacheEntry<mozilla::a11y::Accessible>, |
| michael@0 | 78 | &aCallback); |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | #endif |
