The Tor Browser / file comparison
comparison: accessible/src/generic/ImageAccessible.h
accessible/src/generic/ImageAccessible.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:9999d7e0779d |
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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 mozilla_a11y_ImageAccessible_h__ | |
| 7 #define mozilla_a11y_ImageAccessible_h__ | |
| 8 | |
| 9 #include "BaseAccessibles.h" | |
| 10 #include "nsIAccessibleImage.h" | |
| 11 | |
| 12 class nsGenericHTMLElement; | |
| 13 | |
| 14 namespace mozilla { | |
| 15 namespace a11y { | |
| 16 | |
| 17 /* Accessible for supporting images | |
| 18 * supports: | |
| 19 * - gets name, role | |
| 20 * - support basic state | |
| 21 */ | |
| 22 class ImageAccessible : public LinkableAccessible, | |
| 23 public nsIAccessibleImage | |
| 24 { | |
| 25 public: | |
| 26 ImageAccessible(nsIContent* aContent, DocAccessible* aDoc); | |
| 27 | |
| 28 // nsISupports | |
| 29 NS_DECL_ISUPPORTS_INHERITED | |
| 30 | |
| 31 // nsIAccessible | |
| 32 NS_IMETHOD GetActionName(uint8_t aIndex, nsAString& aName); | |
| 33 NS_IMETHOD DoAction(uint8_t index); | |
| 34 | |
| 35 // nsIAccessibleImage | |
| 36 NS_DECL_NSIACCESSIBLEIMAGE | |
| 37 | |
| 38 // Accessible | |
| 39 virtual a11y::role NativeRole(); | |
| 40 virtual uint64_t NativeState(); | |
| 41 virtual already_AddRefed<nsIPersistentProperties> NativeAttributes() MOZ_OVERRIDE; | |
| 42 | |
| 43 // ActionAccessible | |
| 44 virtual uint8_t ActionCount(); | |
| 45 | |
| 46 protected: | |
| 47 // Accessible | |
| 48 virtual ENameValueFlag NativeName(nsString& aName) MOZ_OVERRIDE; | |
| 49 | |
| 50 private: | |
| 51 /** | |
| 52 * Return whether the element has a longdesc URI. | |
| 53 */ | |
| 54 bool HasLongDesc() const | |
| 55 { | |
| 56 nsCOMPtr<nsIURI> uri = GetLongDescURI(); | |
| 57 return uri; | |
| 58 } | |
| 59 | |
| 60 /** | |
| 61 * Return an URI for showlongdesc action if any. | |
| 62 */ | |
| 63 already_AddRefed<nsIURI> GetLongDescURI() const; | |
| 64 | |
| 65 /** | |
| 66 * Used by GetActionName and DoAction to ensure the index for opening the | |
| 67 * longdesc URL is valid. | |
| 68 * It is always assumed that the highest possible index opens the longdesc. | |
| 69 * This doesn't check that there is actually a longdesc, just that the index | |
| 70 * would be correct if there was one. | |
| 71 * | |
| 72 * @param aIndex The 0-based index to be tested. | |
| 73 * | |
| 74 * @returns true if index is valid for longdesc action. | |
| 75 */ | |
| 76 inline bool IsLongDescIndex(uint8_t aIndex); | |
| 77 | |
| 78 }; | |
| 79 | |
| 80 //////////////////////////////////////////////////////////////////////////////// | |
| 81 // Accessible downcasting method | |
| 82 | |
| 83 inline ImageAccessible* | |
| 84 Accessible::AsImage() | |
| 85 { | |
| 86 return IsImage() ? static_cast<ImageAccessible*>(this) : nullptr; | |
| 87 } | |
| 88 | |
| 89 } // namespace a11y | |
| 90 } // namespace mozilla | |
| 91 | |
| 92 #endif | |
| 93 |
