/*
* screens_commands.c
* This file is part of LCDd, the lcdproc server.
*
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
*
* Copyright (c) 1999, William Ferrell, Scott Scriven
* 2002, Joris Robijn
*
*
* This contains definitions for all the functions which clients can run.
* The functions here are to be called only from parse.c's interpreter.
*
* The client's available function set is defined here, as is the syntax
* for each command.
*
* This particular file defines actions concerning screens.
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "shared/report.h"
#include "shared/sockets.h"
#include "client.h"
#include "screen.h"
#include "render.h"
/***************************************************************
* Tells the server the client has another screen to offer
*
* Usage: screen_add <id>
*/
int
screen_add_func (Client * c, int argc, char **argv)
{
int err = 0;
Screen * s;
if (!c->ack)
return 1;
if (argc != 2) {
sock_send_error(c->sock, "Usage: screen_add <screenid>\n");
return 0;
}
debug(RPT_DEBUG, "screen_add: Adding screen %s", argv[1]);
s = client_find_screen (c, argv[1]);
if (s) {
sock_send_error(c->sock, "Screen already exists\n");
return 0;
}
s = screen_create (argv[1], c);
if (!s) {
sock_send_error(c->sock, "failed to create screen\n");
return 0;
}
err = client_add_screen (c, s);
if (err == 0) {
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "failed to add screen\n");
}
report(RPT_INFO, "Client on socket %d added added screen \"%s\"", c->sock, s->id);
return 0;
}
/****************************************************************
* Client requests that the server forget about a screen
*
* Usage: screen_del <screenid>
*/
int
screen_del_func (Client * c, int argc, char **argv)
{
int err = 0;
Screen * s;
if (!c->ack)
return 1;
if (argc != 2) {
sock_send_error(c->sock, "Usage: screen_del <screenid>\n");
return 0;
}
debug (RPT_DEBUG, "screen_del: Deleting screen %s", argv[1]);
s = client_find_screen (c, argv[1]);
if (!s) {
sock_send_error(c->sock, "Unknown screen id\n");
return 0;
}
err = client_remove_screen (c, s);
if ( err == 0 )
sock_send_string(c->sock, "success\n");
else if (err < 0) {
sock_send_error(c->sock, "failed to remove screen\n");
} else
sock_send_error(c->sock, "Unknown screen id\n");
report(RPT_INFO, "Client on socket %d removed screen \"%s\"", c->sock, s->id);
screen_destroy(s);
return 0;
}
/***************************************************************
* Configures info about a particular screen, such as its
* name, priority, or duration
*
* Usage: screen_set <id> [-name <name>] [-wid <width>] [-hgt <height>]
* [-priority <prio>] [-duration <int>] [-timeout <int>]
* [-heartbeat <type>] [-backlight <type>]
* [-cursor <type>] [-cursor_x <xpos>] [-cursor_y <ypos>]
*/
int
screen_set_func (Client * c, int argc, char **argv)
{
int i;
int number;
char *id;
Screen * s;
if (!c->ack)
return 1;
if (argc == 1) {
sock_send_error(c->sock, "Usage: screen_set <id> [-name <name>]"
" [-wid <width>] [-hgt <height>] [-priority <int>]"
" [-duration <int>] [-timeout <int>]"
" [-heartbeat <type>] [-backlight <type>]"
" [-cursor <type>]"
" [-cursor_x <xpos>] [-cursor_y <ypos>]\n");
return 0;
} else if (argc == 2) {
sock_send_error(c->sock, "What do you want to set?\n");
return 0;
}
id = argv[1];
s = client_find_screen (c, id);
if (!s) {
sock_send_error(c->sock, "Unknown screen id\n");
return 0;
}
/* Handle the rest of the parameters*/
for (i = 2; i < argc; i++) {
char *p;
/* The following code allows us to use p for comparisions,
* ignoring a (valid) single leading '-' - reduces string comparisons
* by half.
*/
p = argv[i];
if (*p == '-')
p++;
/* Handle the "name" parameter*/
if (strcmp (p, "name") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: name=\"%s\"", argv[i]);
/* set the name...*/
if (s->name)
free (s->name);
s->name = strdup (argv[i]);
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-name requires a parameter\n");
}
}
/* Handle the "priority" parameter*/
else if (strcmp (p, "priority") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: priority=\"%s\"", argv[i]);
/* first try to interpret it as a number */
number = atoi (argv[i]);
if (number > 0) {
if (number <= 64) {
s->priority = PRI_FOREGROUND;
} else if (number < 192) {
s->priority = PRI_INFO;
} else {
s->priority = PRI_BACKGROUND;
}
} else {
/* Try if it is a priority class */
number = screen_pri_name_to_pri (argv[i]);
}
if (number >= 0) {
s->priority = number;
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "invalid argument at -priority\n");
}
} else {
sock_send_error(c->sock, "-priority requires a parameter\n");
}
}
/* Handle the "duration" parameter*/
else if (strcmp (p, "duration") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: duration=\"%s\"", argv[i]);
/* set the duration...*/
number = atoi (argv[i]);
if (number > 0)
s->duration = number;
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-duration requires a parameter\n");
}
}
/* Handle the "heartbeat" parameter*/
else if (strcmp (p, "heartbeat") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: heartbeat=\"%s\"", argv[i]);
/* set the heartbeat type...*/
if (0 == strcmp (argv[i], "on"))
s->heartbeat = HEARTBEAT_ON;
else if (0 == strcmp (argv[i], "off"))
s->heartbeat = HEARTBEAT_OFF;
else if (0 == strcmp (argv[i], "open"))
s->heartbeat = HEARTBEAT_OPEN;
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-heartbeat requires a parameter\n");
}
}
/* Handle the "wid" parameter*/
else if (strcmp (p, "wid") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: wid=\"%s\"", argv[i]);
/* set the duration...*/
number = atoi (argv[i]);
if (number > 0)
s->width = number;
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-wid requires a parameter\n");
}
}
/* Handle the "hgt" parameter*/
else if (strcmp (p, "hgt") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: hgt=\"%s\"", argv[i]);
/* set the duration...*/
number = atoi (argv[i]);
if (number > 0)
s->height = number;
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-hgt requires a parameter\n");
}
}
/* Handle the "timeout" parameter*/
else if (strcmp (p, "timeout") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: timeout=\"%s\"", argv[i]);
/* set the duration...*/
number = atoi (argv[i]);
/* Add the timeout value (count of TIME_UNITS)
* to struct, TIME_UNIT is 1/8th of a second
*/
if (number > 0) {
s->timeout = number;
report(RPT_NOTICE, "Timeout set.");
}
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-timeout requires a parameter\n");
}
}
/* Handle the "backlight" parameter*/
else if (strcmp (p, "backlight") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: backlight=\"%s\"", argv[i]);
/* set the backlight status based on what the client has set*/
switch(c->backlight) {
case BACKLIGHT_OPEN:
if (strcmp ("on", argv[i]) == 0)
s->backlight = BACKLIGHT_ON;
if (strcmp ("off", argv[i]) == 0)
s->backlight = BACKLIGHT_OFF;
if (strcmp ("toggle", argv[i]) == 0) {
if (s->backlight == BACKLIGHT_ON)
s->backlight = BACKLIGHT_OFF;
else if (s-backlight == BACKLIGHT_OFF)
s->backlight = BACKLIGHT_ON;
}
if (strcmp ("blink", argv[i]) == 0)
s->backlight |= BACKLIGHT_BLINK;
if (strcmp ("flash", argv[i]) == 0)
s->backlight |= BACKLIGHT_FLASH;
break;
default:
/*If the backlight is not OPEN then inherit its state*/
s->backlight = c->backlight;
break;
}
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-backlight requires a parameter\n");
}
}
/* Handle the "cursor" parameter */
else if (strcmp (p, "cursor") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: cursor=\"%s\"", argv[i]);
/* set the heartbeat type...*/
if (0 == strcmp (argv[i], "off"))
s->cursor = CURSOR_OFF;
if (0 == strcmp (argv[i], "on"))
s->cursor = CURSOR_DEFAULT_ON;
if (0 == strcmp (argv[i], "under"))
s->cursor = CURSOR_UNDER;
if (0 == strcmp (argv[i], "block"))
s->cursor = CURSOR_BLOCK;
sock_send_string(c->sock, "success\n");
} else {
sock_send_error(c->sock, "-cursor requires a parameter\n");
}
}
/* Handle the "cursor_x" parameter */
else if (strcmp (p, "cursor_x") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: cursor_x=\"%s\"", argv[i]);
/* set the position...*/
number = atoi (argv[i]);
if (number > 0 && number <= s->width) {
s->cursor_x = number;
sock_send_string(c->sock, "success\n");
}
else {
sock_send_error(c->sock, "Cursor position outside screen\n");
}
} else {
sock_send_error(c->sock, "-cursor_x requires a parameter\n");
}
}
/* Handle the "cursor_y" parameter */
else if (strcmp (p, "cursor_y") == 0) {
if (argc > i + 1) {
i++;
debug (RPT_DEBUG, "screen_set: cursor_y=\"%s\"", argv[i]);
/* set the position...*/
number = atoi (argv[i]);
if (number > 0 && number <= s->height) {
s->cursor_y = number;
sock_send_string(c->sock, "success\n");
}
else {
sock_send_error(c->sock, "Cursor position outside screen\n");
}
} else {
sock_send_error(c->sock, "-cursor_y requires a parameter\n");
}
}
else sock_send_error(c->sock, "invalid parameter\n");
}/* done checking argv*/
return 0;
}
/**********************************************************************
* Tells the server the client would like to accept keypresses
* of a particular type when the given screen is active on the display
*
* Usage: screen_add_key <screenid> <keylist>
*/
int
screen_add_key_func (Client * c, int argc, char **argv)
{
/*widget * w ;*/ /* Keys are stored on a WID_KEYS widget */
Screen * s ; /* Attached to a specific screen */
char * id ; /* Screen ID */
char * keys ; /* Keys wanted */
if (!c->ack)
return 1;
if (argc != 3) {
switch (argc) {
case 1:
sock_send_error(c->sock, "Usage: screen_add_key <screenid> <keylist>\n");
break;
case 2:
sock_send_error(c->sock, "You must specify a key list\n");
break;
default:
sock_send_error(c->sock, "Too many parameters...\n");
break;
}
return 0;
}
id = argv[1];
keys = argv[2];
debug(RPT_DEBUG, "screen_add_key: Adding key(s) %s to screen %s", keys, id);
/* Find the screen*/
s = client_find_screen (c, id);
if (!s) {
sock_send_error(c->sock, "Unknown screen id\n");
return 0;
}
/* Save the keys*/
if (!s->keys) {
/* Save supplied key list*/
s->keys = strdup( keys );
} else {
/* Add supplied keys to existing list
* NOTE: There could be duplicates in the resulting list
* That's OK, it's the existence of the key in the list
* that's important. We'll be more careful in the delete
* key function.
*/
char * new_keys ;
new_keys = realloc( s->keys, strlen(s->keys) + strlen(keys) +1 );
if (new_keys) {
strcpy (new_keys, s->keys);
strcat (new_keys, keys );
free (s->keys);
s->keys = new_keys;
} else {
sock_send_error(c->sock, "Could not add new keys\n");
return 0;
}
}
if (!s->keys) {
sock_send_error(c->sock, "failed\n");
} else
sock_send_string(c->sock, "success\n");
return 0;
}
/*************************************************************************
* Tells the server the client would NOT like to accept keypresses
* of a particular type when the given screen is active on the display
*
* Usage: screen_del_key <screenid> <keylist>
*/
int
screen_del_key_func (Client * c, int argc, char **argv)
{
/*widget * w ;*/ /* Keys are stored on a WID_KEYS widget */
Screen * s ; /* Attached to a specific screen */
char * id ; /* Screen ID */
char * keys ; /* Keys wanted */
if (!c->ack)
return 1;
if (argc != 3) {
switch (argc) {
case 1:
sock_send_error(c->sock, "Usage: screen_del_key <screenid> <keylist>\n");
break;
case 2:
sock_send_error(c->sock, "You must specify a key list\n");
break;
default:
sock_send_error(c->sock, "Too many parameters\n");
break;
}
return 0;
}
id = argv[1] ;
keys = argv[2] ;
debug(RPT_DEBUG, "screen_del_key: Deleting key(s) %s from screen %s", keys, id);
/* Find the screen*/
s = client_find_screen (c, id);
if (!s) {
sock_send_error(c->sock, "Unknown screen id\n");
return 0;
}
/* Do we have keys?*/
if (s->keys) {
/* Have keys, remove keys from the list
* NOTE: We let malloc/realloc remember the length
* of the allocated storage. If keys are later
* added, realloc (in add_key above) will make
* sure there is enough space at s->keys
*/
char * from ;
char * to ;
to = from = s->keys ;
while( *from ) {
/* Is this key to be deleted from the list?*/
if( strchr( keys, *from ) ) {
/* Yes, skip it*/
++from ;
} else {
/* No, save it*/
*to++ = *from++ ;
}
}
to = '\0'; /* terminates the new keys string...*/
}
sock_send_string(c->sock, "success\n");
return 0;
}
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