src/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, int count)
  35 {
  36         subscriber_list_t *sb = calloc(1, sizeof(subscriber_list_t));
  37         sb->prev = sb->next = NULL;
  38         sb->stream = stream;
  39         sb->field = field;
  40         sb->count = count;
  41         return sb;
  42 }
  43
  44 void remove_subscriber(subscriber_list_t *sb)
  45 {
  46         if (sb == NULL) {
  47                 return;
  48         }
  49         subscriber_list_t *a = sb->prev;
  50         subscriber_list_t *b = sb->next;
  51         if (a != NULL) {
  52                 a->next = b;
  53         }
  54         if (b != NULL) {
  55                 b->prev = a;
  56         }
  57         if (sb == subscribe_head) {
  58                 subscribe_head = b;
  59         }
  60         if (sb == subscribe_tail) {
  61                 subscribe_tail = a;
  62         }
  63         fclose(sb->stream);
  64         free(sb);
  65 }
  66
  67 void add_subscriber(FILE *stream, int field, int count)
  68 {
  69         subscriber_list_t *sb = make_subscriber_list(stream, field, count);
  70         if (subscribe_head == NULL) {
  71                 subscribe_head = subscribe_tail = sb;
  72         } else {
  73                 subscribe_tail->next = sb;
  74                 sb->prev = subscribe_tail;
  75                 subscribe_tail = sb;
  76         }
  77         if (sb->field & SBSC_MASK_REPORT) {
  78                 print_report(sb->stream);
  79         }
  80 }
  81
  82 int print_report(FILE *stream)
  83 {
  84         fprintf(stream, "%s", status_prefix);
  85         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
  86                 fprintf(stream, "%c%s", (mon == m ? 'M' : 'm'), m->name);
  87                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
  88                         char c = (is_urgent(d) ? 'u' : (d->root == NULL ? 'f' : 'o'));
  89                         if (m->desk == d) {
  90                                 c = toupper(c);
  91                         }
  92                         fprintf(stream, ":%c%s", c, d->name);
  93                 }
  94                 if (m->desk != NULL) {
  95                         fprintf(stream, ":L%c", LAYOUT_CHR(m->desk->layout));
  96                         if (m->desk->focus != NULL) {
  97                                 node_t *n = m->desk->focus;
  98                                 if (n->client != NULL) {
  99                                         fprintf(stream, ":T%c", STATE_CHR(n->client->state));
 100                                 } else {
 101                                         fprintf(stream, ":T@");
 102                                 }
 103                                 int i = 0;
 104                                 char flags[4];
 105                                 if (n->sticky) {
 106                                         flags[i++] = 'S';
 107                                 }
 108                                 if (n->private) {
 109                                         flags[i++] = 'P';
 110                                 }
 111                                 if (n->locked) {
 112                                         flags[i++] = 'L';
 113                                 }
 114                                 flags[i] = '\0';
 115                                 fprintf(stream, ":G%s", flags);
 116                         }
 117                 }
 118                 if (m != mon_tail) {
 119                         fprintf(stream, "%s", ":");
 120                 }
 121         }
 122         fprintf(stream, "%s", "\n");
 123         return fflush(stream);
 124 }
 125
 126 void put_status(subscriber_mask_t mask, ...)
 127 {
 128         subscriber_list_t *sb = subscribe_head;
 129         int ret;
 130         while (sb != NULL) {
 131                 subscriber_list_t *next = sb->next;
 132                 if (sb->field & mask) {
 133                         if (sb->count > 0) {
 134                                 sb->count--;
 135                         }
 136                         if (mask == SBSC_MASK_REPORT) {
 137                                 ret = print_report(sb->stream);
 138                         } else {
 139                                 char *fmt;
 140                                 va_list args;
 141                                 va_start(args, mask);
 142                                 fmt = va_arg(args, char *);
 143                                 vfprintf(sb->stream, fmt, args);
 144                                 va_end(args);
 145                                 ret = fflush(sb->stream);
 146                         }
 147                         if (ret != 0 || sb->count == 0) {
 148                                 remove_subscriber(sb);
 149                         }
 150                 }
 151                 sb = next;
 152         }
 153 }