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comparison: accessible/src/base/AccCollector.h
accessible/src/base/AccCollector.h
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef mozilla_a11y_AccCollector_h__ | |
| 6 #define mozilla_a11y_AccCollector_h__ | |
| 7 | |
| 8 #include "Filters.h" | |
| 9 | |
| 10 #include "nsTArray.h" | |
| 11 | |
| 12 namespace mozilla { | |
| 13 namespace a11y { | |
| 14 | |
| 15 class Accessible; | |
| 16 | |
| 17 /** | |
| 18 * Collect accessible children complying with filter function. Provides quick | |
| 19 * access to accessible by index. | |
| 20 */ | |
| 21 class AccCollector | |
| 22 { | |
| 23 public: | |
| 24 AccCollector(Accessible* aRoot, filters::FilterFuncPtr aFilterFunc); | |
| 25 virtual ~AccCollector(); | |
| 26 | |
| 27 /** | |
| 28 * Return accessible count within the collection. | |
| 29 */ | |
| 30 uint32_t Count(); | |
| 31 | |
| 32 /** | |
| 33 * Return an accessible from the collection at the given index. | |
| 34 */ | |
| 35 Accessible* GetAccessibleAt(uint32_t aIndex); | |
| 36 | |
| 37 /** | |
| 38 * Return index of the given accessible within the collection. | |
| 39 */ | |
| 40 virtual int32_t GetIndexAt(Accessible* aAccessible); | |
| 41 | |
| 42 protected: | |
| 43 /** | |
| 44 * Ensure accessible at the given index is stored and return it. | |
| 45 */ | |
| 46 Accessible* EnsureNGetObject(uint32_t aIndex); | |
| 47 | |
| 48 /** | |
| 49 * Ensure index for the given accessible is stored and return it. | |
| 50 */ | |
| 51 int32_t EnsureNGetIndex(Accessible* aAccessible); | |
| 52 | |
| 53 /** | |
| 54 * Append the object to collection. | |
| 55 */ | |
| 56 virtual void AppendObject(Accessible* aAccessible); | |
| 57 | |
| 58 filters::FilterFuncPtr mFilterFunc; | |
| 59 Accessible* mRoot; | |
| 60 uint32_t mRootChildIdx; | |
| 61 | |
| 62 nsTArray<Accessible*> mObjects; | |
| 63 | |
| 64 private: | |
| 65 AccCollector(); | |
| 66 AccCollector(const AccCollector&); | |
| 67 AccCollector& operator =(const AccCollector&); | |
| 68 }; | |
| 69 | |
| 70 /** | |
| 71 * Collect embedded objects. Provide quick access to accessible by index and | |
| 72 * vice versa. | |
| 73 */ | |
| 74 class EmbeddedObjCollector : public AccCollector | |
| 75 { | |
| 76 public: | |
| 77 virtual ~EmbeddedObjCollector() { } | |
| 78 | |
| 79 public: | |
| 80 virtual int32_t GetIndexAt(Accessible* aAccessible); | |
| 81 | |
| 82 protected: | |
| 83 // Make sure it's used by Accessible class only. | |
| 84 EmbeddedObjCollector(Accessible* aRoot) : | |
| 85 AccCollector(aRoot, filters::GetEmbeddedObject) { } | |
| 86 | |
| 87 virtual void AppendObject(Accessible* aAccessible); | |
| 88 | |
| 89 friend class Accessible; | |
| 90 }; | |
| 91 | |
| 92 } // namespace a11y | |
| 93 } // namespace mozilla | |
| 94 | |
| 95 #endif |
