/*
 * BRLTTY - A background process providing access to the console screen (when in
 *          text mode) for a blind person using a refreshable braille display.
 *
 * Copyright (C) 1995-2021 by The BRLTTY Developers.
 *
 * BRLTTY comes with ABSOLUTELY NO WARRANTY.
 *
 * This is free software, placed under the terms of the
 * GNU Lesser General Public License, as published by the Free Software
 * Foundation; either version 2.1 of the License, or (at your option) any
 * later version. Please see the file LICENSE-LGPL for details.
 *
 * Web Page: http://brltty.app/
 *
 * This software is maintained by Dave Mielke <dave@mielke.cc>.
 */

#ifndef BRLTTY_INCLUDED_KTB_TYPES
#define BRLTTY_INCLUDED_KTB_TYPES

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define MAX_KEYS_PER_GROUP 0X100
#define KTB_KEY_ANY 0XFF
#define KTB_KEY_MAX 0XFE

typedef unsigned char KeyGroup;
typedef unsigned char KeyNumber;

typedef struct {
  KeyGroup group;
  KeyNumber number;
} KeyValue;

typedef struct {
  const char *name;
  KeyValue value;
} KeyNameEntry;

#define KEY_NAME_TABLE(name) keyNameTable_##name
#define KEY_NAME_TABLE_DECLARATION(name) const KeyNameEntry KEY_NAME_TABLE(name)[]
#define KEY_NAME_ENTRY(keyNumber,keyName) {.value.number=keyNumber, .name=keyName}
#define KEY_GROUP_ENTRY(keyGroup,keyName) {.value={.group=keyGroup, .number=KTB_KEY_ANY}, .name=keyName}
#define LAST_KEY_NAME_ENTRY {.name=NULL}
#define BEGIN_KEY_NAME_TABLE(name) static KEY_NAME_TABLE_DECLARATION(name) = {
#define END_KEY_NAME_TABLE LAST_KEY_NAME_ENTRY};
#define KEY_NAME_SUBTABLE(name,count) (KEY_NAME_TABLE(name) + (ARRAY_COUNT(KEY_NAME_TABLE(name)) - 1 - (count)))

#define KEY_NAME_TABLES(name) keyNameTables_##name
#define KEY_NAME_TABLES_REFERENCE const KeyNameEntry *const *
#define KEY_NAME_TABLES_DECLARATION(name) const KeyNameEntry *const KEY_NAME_TABLES(name)[]
#define LAST_KEY_NAME_TABLE NULL
#define BEGIN_KEY_NAME_TABLES(name) static KEY_NAME_TABLES_DECLARATION(name) = {
#define END_KEY_NAME_TABLES LAST_KEY_NAME_TABLE};

typedef struct {
  const char *bindings;
  KEY_NAME_TABLES_REFERENCE names;
} KeyTableDefinition;

#define KEY_TABLE_DEFINITION(name) keyTableDefinition_##name
#define KEY_TABLE_DECLARATION(name) const KeyTableDefinition KEY_TABLE_DEFINITION(name)
#define KEY_TABLE_INITIALIZER(name) = {.bindings=#name, .names=KEY_NAME_TABLES(name)}
#define DEFINE_KEY_TABLE(name) \
  static KEY_TABLE_DECLARATION(name) KEY_TABLE_INITIALIZER(name);
#define PUBLIC_KEY_TABLE(name) \
  KEY_TABLE_DECLARATION(name) KEY_TABLE_INITIALIZER(name);
#define EXTERNAL_KEY_TABLE(name) extern KEY_TABLE_DECLARATION(name);

typedef enum {
  KTS_UNBOUND,
  KTS_MODIFIERS,
  KTS_COMMAND,
  KTS_HOTKEY
} KeyTableState;

typedef struct KeyTableStruct KeyTable;

typedef enum {
  KTB_CTX_MENU,
  KTB_CTX_WAITING,
  KTB_CTX_DEFAULT /* this one must be defined last */
} KeyTableCommandContext;

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* BRLTTY_INCLUDED_KTB_TYPES */
