/* 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 NS_ACCESSIBLE_WRAP_H_
#define NS_ACCESSIBLE_WRAP_H_

#include "nsCOMPtr.h"
#include "LocalAccessible.h"

struct _AtkObject;
typedef struct _AtkObject AtkObject;

enum AtkProperty {
  PROP_0,  // gobject convention
  PROP_NAME,
  PROP_DESCRIPTION,
  PROP_PARENT,  // ancestry has changed
  PROP_ROLE,
  PROP_LAYER,
  PROP_MDI_ZORDER,
  PROP_TABLE_CAPTION,
  PROP_TABLE_COLUMN_DESCRIPTION,
  PROP_TABLE_COLUMN_HEADER,
  PROP_TABLE_ROW_DESCRIPTION,
  PROP_TABLE_ROW_HEADER,
  PROP_TABLE_SUMMARY,
  PROP_LAST  // gobject convention
};

struct AtkPropertyChange {
  int32_t type;  // property type as listed above
  void* oldvalue;
  void* newvalue;
};

namespace mozilla {
namespace a11y {

class MaiHyperlink;

/**
 * Atk specific functionality for an accessibility tree node that originated in
 * mDoc's content process.
 *
 * AccessibleWrap, and its descendents in atk directory provide the
 * implementation of AtkObject.
 */
class AccessibleWrap : public LocalAccessible {
 public:
  AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc);
  virtual ~AccessibleWrap();
  void ShutdownAtkObject();

  virtual void Shutdown() override;

  // return the atk object for this AccessibleWrap
  virtual void GetNativeInterface(void** aOutAccessible) override;

  AtkObject* GetAtkObject(void);
  static AtkObject* GetAtkObject(LocalAccessible* aAccessible);

  bool IsValidObject();

  /**
   * ATK has a bunch of getters that expect a borrowed reference to raw char*
   * pointers. To simulate this, we have a method that uses a static nsCString
   * return a temporary buffer that gets wiped on the next call.
   */
  static const char* ReturnString(nsAString& aString);

  static void GetKeyBinding(Accessible* aAccessible, nsAString& aResult);

  static Accessible* GetColumnHeader(TableAccessible* aAccessible,
                                     int32_t aColIdx);
  static Accessible* GetRowHeader(TableAccessible* aAccessible,
                                  int32_t aRowIdx);

 protected:
  nsresult FireAtkStateChangeEvent(AccEvent* aEvent, AtkObject* aObject);
  nsresult FireAtkTextChangedEvent(AccEvent* aEvent, AtkObject* aObject);

  AtkObject* mAtkObject;
};

}  // namespace a11y
}  // namespace mozilla

#endif /* NS_ACCESSIBLE_WRAP_H_ */