subscribe.c

   1 /* Copyright (c) 2012, Bastien Dejean
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1. Redistributions of source code must retain the above copyright notice, this
   8  *    list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright notice,
  10  *    this list of conditions and the following disclaimer in the documentation
  11  *    and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  17  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  20  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <ctype.h>
  28 #include <stdarg.h>
  29 #include "bspwm.h"
  30 #include "desktop.h"
  31 #include "settings.h"
  32 #include "subscribe.h"
  33
  34 subscriber_list_t *make_subscriber_list(FILE *stream, int field)
  35 {
  36         subscriber_list_t *sb = malloc(sizeof(subscriber_list_t));
  37         sb->prev = sb->next = NULL;
  38         sb->stream = stream;
  39         sb->field = field;
  40         return sb;
  41 }
  42
  43 void remove_subscriber(subscriber_list_t *sb)
  44 {
  45         if (sb == NULL) {
  46                 return;
  47         }
  48         subscriber_list_t *a = sb->prev;
  49         subscriber_list_t *b = sb->next;
  50         if (a != NULL) {
  51                 a->next = b;
  52         }
  53         if (b != NULL) {
  54                 b->prev = a;
  55         }
  56         if (sb == subscribe_head) {
  57                 subscribe_head = b;
  58         }
  59         if (sb == subscribe_tail) {
  60                 subscribe_tail = a;
  61         }
  62         fclose(sb->stream);
  63         free(sb);
  64 }
  65
  66 void add_subscriber(FILE *stream, int field)
  67 {
  68         subscriber_list_t *sb = make_subscriber_list(stream, field);
  69         if (subscribe_head == NULL) {
  70                 subscribe_head = subscribe_tail = sb;
  71         } else {
  72                 subscribe_tail->next = sb;
  73                 sb->prev = subscribe_tail;
  74                 subscribe_tail = sb;
  75         }
  76         if (sb->field & SBSC_MASK_REPORT) {
  77                 print_report(sb->stream);
  78         }
  79 }
  80
  81 int print_report(FILE *stream)
  82 {
  83         fprintf(stream, "%s", status_prefix);
  84         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
  85                 fprintf(stream, "%c%s", (mon == m ? 'M' : 'm'), m->name);
  86                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
  87                         char c = (is_urgent(d) ? 'u' : (d->root == NULL ? 'f' : 'o'));
  88                         if (m->desk == d) {
  89                                 c = toupper(c);
  90                         }
  91                         fprintf(stream, ":%c%s", c, d->name);
  92                 }
  93                 if (m->desk != NULL) {
  94                         fprintf(stream, ":L%c", LAYOUT_CHR(m->desk->layout));
  95                         if (m->desk->focus != NULL) {
  96                                 node_t *n = m->desk->focus;
  97                                 if (n->client != NULL) {
  98                                         fprintf(stream, ":T%c", STATE_CHR(n->client->state));
  99                                 } else {
 100                                         fprintf(stream, ":T@");
 101                                 }
 102                                 int i = 0;
 103                                 char flags[4];
 104                                 if (n->sticky) {
 105                                         flags[i++] = 'S';
 106                                 }
 107                                 if (n->private) {
 108                                         flags[i++] = 'P';
 109                                 }
 110                                 if (n->locked) {
 111                                         flags[i++] = 'L';
 112                                 }
 113                                 flags[i] = '\0';
 114                                 fprintf(stream, ":G%s", flags);
 115                         }
 116                 }
 117                 if (m != mon_tail) {
 118                         fprintf(stream, "%s", ":");
 119                 }
 120         }
 121         fprintf(stream, "%s", "\n");
 122         return fflush(stream);
 123 }
 124
 125 void put_status(subscriber_mask_t mask, ...)
 126 {
 127         subscriber_list_t *sb = subscribe_head;
 128         int ret;
 129         while (sb != NULL) {
 130                 subscriber_list_t *next = sb->next;
 131                 if (sb->field & mask) {
 132                         if (mask == SBSC_MASK_REPORT) {
 133                                 ret = print_report(sb->stream);
 134                         } else {
 135                                 char *fmt;
 136                                 va_list args;
 137                                 va_start(args, mask);
 138                                 fmt = va_arg(args, char *);
 139                                 vfprintf(sb->stream, fmt, args);
 140                                 va_end(args);
 141                                 ret = fflush(sb->stream);
 142                         }
 143                         if (ret != 0) {
 144                                 remove_subscriber(sb);
 145                         }
 146                 }
 147                 sb = next;
 148         }
 149 }