tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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AccessibleWrap.h (2594B)

      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 * Atk specific functionality for an accessibility tree node that originated in
     46 * mDoc's content process.
     47 *
     48 * AccessibleWrap, and its descendents in atk directory provide the
     49 * implementation of AtkObject.
     50 */
     51 class AccessibleWrap : public LocalAccessible {
     52 public:
     53  AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc);
     54  virtual ~AccessibleWrap();
     55  void ShutdownAtkObject();
     56 
     57  virtual void Shutdown() override;
     58 
     59  // return the atk object for this AccessibleWrap
     60  virtual void GetNativeInterface(void** aOutAccessible) override;
     61 
     62  AtkObject* GetAtkObject(void);
     63  static AtkObject* GetAtkObject(LocalAccessible* aAccessible);
     64 
     65  bool IsValidObject();
     66 
     67  /**
     68   * ATK has a bunch of getters that expect a borrowed reference to raw char*
     69   * pointers. To simulate this, we have a method that uses a static nsCString
     70   * return a temporary buffer that gets wiped on the next call.
     71   */
     72  static const char* ReturnString(nsAString& aString);
     73 
     74  static void GetKeyBinding(Accessible* aAccessible, nsAString& aResult);
     75 
     76  static Accessible* GetColumnHeader(TableAccessible* aAccessible,
     77                                     int32_t aColIdx);
     78  static Accessible* GetRowHeader(TableAccessible* aAccessible,
     79                                  int32_t aRowIdx);
     80 
     81 protected:
     82  nsresult FireAtkStateChangeEvent(AccEvent* aEvent, AtkObject* aObject);
     83  nsresult FireAtkTextChangedEvent(AccEvent* aEvent, AtkObject* aObject);
     84 
     85  AtkObject* mAtkObject;
     86 };
     87 
     88 }  // namespace a11y
     89 }  // namespace mozilla
     90 
     91 #endif /* __NS_ACCESSIBLE_WRAP_H__ */