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/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016, 2017 Mattias Andrée (maandree@kth.se)
*
* 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
*/
__attribute__((nonnull(1, 2)))
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
*/
__attribute__((nonnull(1, 2)))
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: map-keyboard-leds`
*
* @param recv_keyboard The value of the `Keyboard`-header, `NULL` if omitted
* @return Zero on success, -1 on error
*/
int handle_map_keyboard_leds(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
*/
__attribute__((nonnull(1, 2)))
int handle_keycode_map(const char *recv_client_id, const char *recv_message_id,
const char *recv_action, const char *recv_keyboard);
/**
* Remap a LED, from the command line
*
* @param arg The name of the LED to remap, the new position of the LED,
* either zero-based index or name of the original LED with
* that position; delimited by an equals-sign
* @return Zero on success, -1 on error
*/
__attribute__((nonnull))
int remap_led_cmdline(char *arg);
/**
* 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
*/
__attribute__((nonnull))
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
*/
__attribute__((nonnull))
int send_errno(int error, const char *recv_client_id, const char *recv_message_id);
/**
* Attempt to shrink `mapping`
*/
void shrink_map(void);
#endif
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