/**
* mds — A micro-display server
* Copyright © 2014, 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_MDS_KKBD_H
#define MDS_MDS_KKBD_H
#include "mds-base.h"
/**
* The keyboard listener thread's main function
*
* @param data Input data
* @return Output data
*/
void* keyboard_loop(void* data);
/**
* Handle the received message
*
* @return Zero on success, -1 on error
*/
int handle_message(void);
/**
* Handle the received message after it has been
* identified to contain `Command: enumerate-keyboards`
*
* @param recv_client_id The value of the `Client ID`-header, "0:0" if omitted
* @param recv_message_id The value of the `Message ID`-header
* @param recv_modify_id The value of the `Modify ID`-header, `NULL` if omitted
* @return Zero on success, -1 on error
*/
int handle_enumerate_keyboards(const char* recv_client_id, const char* recv_message_id,
const char* recv_modify_id);
/**
* Handle the received message after it has been
* identified to contain `Command: keyboard-enumeration`
*
* @param recv_modify_id The value of the `Modify ID`-header, `NULL` if omitted
* @return Zero on success, -1 on error
*/
int handle_keyboard_enumeration(const char* recv_modify_id);
/**
* Handle the received message after it has been
* identified to contain `Command: set-keyboard-leds`
*
* @param recv_active The value of the `Active`-header, `NULL` if omitted
* @param recv_mask The value of the `Mask`-header, `NULL` if omitted
* @param recv_keyboard The value of the `Keyboard`-header, `NULL` if omitted
* @return Zero on success, -1 on error
*/
int handle_set_keyboard_leds(const char* recv_active, const char* recv_mask,
const char* recv_keyboard);
/**
* Handle the received message after it has been
* identified to contain `Command: get-keyboard-leds`
*
* @param recv_client_id The value of the `Client ID`-header, "0:0" if omitted
* @param recv_message_id The value of the `Message ID`-header
* @param recv_keyboard The value of the `Keyboard`-header, `NULL` if omitted
* @return Zero on success, -1 on error
*/
int handle_get_keyboard_leds(const char* recv_client_id, const char* recv_message_id,
const char* recv_keyboard);
/**
* Handle the received message after it has been
* identified to contain `Command: keycode-map`
*
* @param recv_client_id The value of the `Client ID`-header, "0:0" if omitted
* @param recv_message_id The value of the `Message ID`-header
* @param recv_action The value of the `Action`-header, `NULL` if omitted
* @param recv_keyboard The value of the `Keyboard`-header, `NULL` if omitted
* @return Zero on success, -1 on error
*/
int handle_keycode_map(const char* recv_client_id, const char* recv_message_id,
const char* recv_action, const char* recv_keyboard);
/**
* Send a full message even if interrupted
*
* @param message The message to send
* @param length The length of the message
* @return Non-zero on success
*/
int full_send(const char* message, size_t length);
/**
* Acquire access of the keyboard's LED:s
*
* @return Zero on success, -1 on error
*/
int open_leds(void);
/**
* Release access of the keyboard's LED:s
*/
void close_leds(void);
/**
* Get active LED:s on the keyboard
*
* @return Active LED:s, -1 on error
*/
int get_leds(void);
/**
* Set active LED:s on the keyboard
*
* @param leds Active LED:s
* @return Zero on success, -1 on error
*/
int set_leds(int leds);
/**
* Acquire access of keyboard input
*
* @return Zero on success, -1 on error
*/
int open_input(void);
/**
* Release access of keyboard input
*/
void close_input(void);
/**
* Broadcast a keyboard input event
*
* @param scancode The scancode
* @param trio Whether the scancode has three integers rather than one
* @return Zero on success, -1 on error
*/
int send_key(int* restrict scancode, int trio);
/**
* Fetch and broadcast keys until interrupted
*
* @return Zero on success, -1 on error
*/
int fetch_keys(void);
/**
* Send a response with an error number
*
* @param error The error number
* @param recv_client_id The client's ID
* @param recv_message_id The message ID of the message the client sent
* @return Zero on success, -1 on error
*/
int send_errno(int error, const char* recv_client_id, const char* recv_message_id);
/**
* Attempt to shrink `mapping`
*/
void shrink_map(void);
#endif
