/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef mozilla_a11y_ImageAccessible_h__ #define mozilla_a11y_ImageAccessible_h__ #include "BaseAccessibles.h" namespace mozilla { namespace a11y { /* Accessible for supporting images * supports: * - gets name, role * - support basic state */ class ImageAccessible : public LinkableAccessible { public: ImageAccessible(nsIContent* aContent, DocAccessible* aDoc); // Accessible virtual a11y::role NativeRole() override; virtual uint64_t NativeState() override; virtual already_AddRefed<nsIPersistentProperties> NativeAttributes() override; // ActionAccessible virtual uint8_t ActionCount() override; virtual void ActionNameAt(uint8_t aIndex, nsAString& aName) override; virtual bool DoAction(uint8_t aIndex) override; // ImageAccessible nsIntPoint Position(uint32_t aCoordType); nsIntSize Size(); protected: virtual ~ImageAccessible(); // Accessible virtual ENameValueFlag NativeName(nsString& aName) override; private: /** * Return whether the element has a longdesc URI. */ bool HasLongDesc() const { nsCOMPtr<nsIURI> uri = GetLongDescURI(); return uri; } /** * Return an URI for showlongdesc action if any. */ already_AddRefed<nsIURI> GetLongDescURI() const; /** * Used by ActionNameAt and DoAction to ensure the index for opening the * longdesc URL is valid. * It is always assumed that the highest possible index opens the longdesc. * This doesn't check that there is actually a longdesc, just that the index * would be correct if there was one. * * @param aIndex The 0-based index to be tested. * * @returns true if index is valid for longdesc action. */ inline bool IsLongDescIndex(uint8_t aIndex); }; //////////////////////////////////////////////////////////////////////////////// // Accessible downcasting method inline ImageAccessible* Accessible::AsImage() { return IsImage() ? static_cast<ImageAccessible*>(this) : nullptr; } } // namespace a11y } // namespace mozilla #endif