accessible/html/HTMLLinkAccessible.h

   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_HTMLLinkAccessible_h__
   7 #define mozilla_a11y_HTMLLinkAccessible_h__
   8
   9 #include "HyperTextAccessibleWrap.h"
  10
  11 namespace mozilla {
  12 namespace a11y {
  13
  14 class HTMLLinkAccessible : public HyperTextAccessibleWrap {
  15  public:
  16   HTMLLinkAccessible(nsIContent* aContent, DocAccessible* aDoc);
  17
  18   NS_INLINE_DECL_REFCOUNTING_INHERITED(HTMLLinkAccessible,
  19                                        HyperTextAccessibleWrap)
  20
  21   // LocalAccessible
  22   virtual void Value(nsString& aValue) const override;
  23   virtual a11y::role NativeRole() const override;
  24   virtual uint64_t NativeState() const override;
  25   virtual uint64_t NativeLinkState() const override;
  26   virtual uint64_t NativeInteractiveState() const override;
  27
  28   // ActionAccessible
  29   virtual uint8_t ActionCount() const override;
  30   virtual void ActionNameAt(uint8_t aIndex, nsAString& aName) override;
  31   virtual bool DoAction(uint8_t aIndex) const override;
  32
  33   // HyperLinkAccessible
  34   virtual bool IsLink() const override;
  35   virtual already_AddRefed<nsIURI> AnchorURIAt(
  36       uint32_t aAnchorIndex) const override;
  37
  38   /**
  39    * Returns true if the link has href attribute.
  40    */
  41   bool IsLinked() const;
  42
  43  protected:
  44   virtual ~HTMLLinkAccessible() {}
  45
  46   virtual bool AttributeChangesState(nsAtom* aAttribute) override;
  47
  48   virtual void DOMAttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  49                                    int32_t aModType,
  50                                    const nsAttrValue* aOldValue,
  51                                    uint64_t aOldState) override;
  52
  53   enum { eAction_Jump = 0 };
  54 };
  55
  56 inline HTMLLinkAccessible* LocalAccessible::AsHTMLLink() {
  57   return IsHTMLLink() ? static_cast<HTMLLinkAccessible*>(this) : nullptr;
  58 }
  59
  60 }  // namespace a11y
  61 }  // namespace mozilla
  62
  63 #endif