accessible/html/HTMLImageMapAccessible.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_HTMLImageMapAccessible_h__
   7 #define mozilla_a11y_HTMLImageMapAccessible_h__
   8
   9 #include "HTMLLinkAccessible.h"
  10 #include "ImageAccessible.h"
  11
  12 namespace mozilla {
  13 namespace a11y {
  14
  15 /**
  16  * Used for HTML image maps.
  17  */
  18 class HTMLImageMapAccessible final : public ImageAccessible {
  19  public:
  20   HTMLImageMapAccessible(nsIContent* aContent, DocAccessible* aDoc);
  21
  22   // nsISupports and cycle collector
  23   NS_INLINE_DECL_REFCOUNTING_INHERITED(HTMLImageMapAccessible, ImageAccessible)
  24
  25   // LocalAccessible
  26   virtual a11y::role NativeRole() const override;
  27
  28   /**
  29    * Update area children of the image map.
  30    */
  31   void UpdateChildAreas(bool aDoFireEvents = true);
  32
  33   /**
  34    * Return accessible of child node.
  35    */
  36   LocalAccessible* GetChildAccessibleFor(const nsINode* aNode) const;
  37
  38  protected:
  39   virtual ~HTMLImageMapAccessible() {}
  40 };
  41
  42 /**
  43  * Accessible for image map areas - must be child of image.
  44  */
  45 class HTMLAreaAccessible final : public HTMLLinkAccessible {
  46  public:
  47   HTMLAreaAccessible(nsIContent* aContent, DocAccessible* aDoc);
  48
  49   // LocalAccessible
  50   virtual void Description(nsString& aDescription) const override;
  51   virtual LocalAccessible* LocalChildAtPoint(
  52       int32_t aX, int32_t aY, EWhichChildAtPoint aWhichChild) override;
  53   virtual nsRect RelativeBounds(nsIFrame** aBoundingFrame) const override;
  54   virtual nsRect ParentRelativeBounds() override;
  55
  56   // HyperLinkAccessible
  57   virtual uint32_t StartOffset() override;
  58   virtual uint32_t EndOffset() override;
  59
  60   virtual bool IsAcceptableChild(nsIContent* aEl) const override {
  61     return false;
  62   }
  63
  64   // LocalAccessible
  65   virtual role NativeRole() const override;
  66
  67  protected:
  68   // LocalAccessible
  69   virtual ENameValueFlag NativeName(nsString& aName) const override;
  70 };
  71
  72 ////////////////////////////////////////////////////////////////////////////////
  73 // LocalAccessible downcasting method
  74
  75 inline HTMLImageMapAccessible* LocalAccessible::AsImageMap() {
  76   return IsImageMap() ? static_cast<HTMLImageMapAccessible*>(this) : nullptr;
  77 }
  78
  79 }  // namespace a11y
  80 }  // namespace mozilla
  81
  82 #endif