accessible/atk/AccessibleWrap.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef __NS_ACCESSIBLE_WRAP_H__
   8 #define __NS_ACCESSIBLE_WRAP_H__
   9
  10 #include "nsCOMPtr.h"
  11 #include "LocalAccessible.h"
  12
  13 struct _AtkObject;
  14 typedef struct _AtkObject AtkObject;
  15
  16 enum AtkProperty {
  17   PROP_0,  // gobject convention
  18   PROP_NAME,
  19   PROP_DESCRIPTION,
  20   PROP_PARENT,  // ancestry has changed
  21   PROP_ROLE,
  22   PROP_LAYER,
  23   PROP_MDI_ZORDER,
  24   PROP_TABLE_CAPTION,
  25   PROP_TABLE_COLUMN_DESCRIPTION,
  26   PROP_TABLE_COLUMN_HEADER,
  27   PROP_TABLE_ROW_DESCRIPTION,
  28   PROP_TABLE_ROW_HEADER,
  29   PROP_TABLE_SUMMARY,
  30   PROP_LAST  // gobject convention
  31 };
  32
  33 struct AtkPropertyChange {
  34   int32_t type;  // property type as listed above
  35   void* oldvalue;
  36   void* newvalue;
  37 };
  38
  39 namespace mozilla {
  40 namespace a11y {
  41
  42 class MaiHyperlink;
  43
  44 /**
  45  * AccessibleWrap, and its descendents in atk directory provide the
  46  * implementation of AtkObject.
  47  */
  48 class AccessibleWrap : public LocalAccessible {
  49  public:
  50   AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc);
  51   virtual ~AccessibleWrap();
  52   void ShutdownAtkObject();
  53
  54   virtual void Shutdown() override;
  55
  56   // return the atk object for this AccessibleWrap
  57   virtual void GetNativeInterface(void** aOutAccessible) override;
  58   virtual nsresult HandleAccEvent(AccEvent* aEvent) override;
  59
  60   AtkObject* GetAtkObject(void);
  61   static AtkObject* GetAtkObject(LocalAccessible* aAccessible);
  62
  63   bool IsValidObject();
  64
  65   static const char* ReturnString(nsAString& aString) {
  66     static nsCString returnedString;
  67     CopyUTF16toUTF8(aString, returnedString);
  68     return returnedString.get();
  69   }
  70
  71   static void GetKeyBinding(LocalAccessible* aAccessible, nsAString& aResult);
  72
  73   static LocalAccessible* GetColumnHeader(TableAccessible* aAccessible,
  74                                           int32_t aColIdx);
  75   static LocalAccessible* GetRowHeader(TableAccessible* aAccessible,
  76                                        int32_t aRowIdx);
  77
  78  protected:
  79   nsresult FireAtkStateChangeEvent(AccEvent* aEvent, AtkObject* aObject);
  80   nsresult FireAtkTextChangedEvent(AccEvent* aEvent, AtkObject* aObject);
  81
  82   AtkObject* mAtkObject;
  83
  84  private:
  85   uint16_t CreateMaiInterfaces();
  86 };
  87
  88 }  // namespace a11y
  89 }  // namespace mozilla
  90
  91 #endif /* __NS_ACCESSIBLE_WRAP_H__ */