focus.c

   1 /*
   2  * focus.c - focus management
   3  *
   4  * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "util.h"
  23 #include "tag.h"
  24 #include "focus.h"
  25 #include "client.h"
  26
  27 extern AwesomeConf globalconf;
  28
  29 static FocusList *
  30 focus_get_node_by_client(Client *c)
  31 {
  32     FocusList *fl;
  33
  34     for(fl = globalconf.focus; fl; fl = fl->prev)
  35         if(fl->client == c)
  36             return fl;
  37
  38     return NULL;
  39 }
  40
  41 static FocusList *
  42 focus_detach_node(FocusList *fl)
  43 {
  44     FocusList *tmp;
  45
  46     if(globalconf.focus == fl)
  47         globalconf.focus = fl->prev;
  48     else
  49     {
  50         for(tmp = globalconf.focus; tmp && tmp->prev != fl; tmp = tmp->prev);
  51         tmp->prev = fl->prev;
  52     }
  53
  54     return fl;
  55 }
  56
  57 static FocusList *
  58 focus_attach_node(FocusList *fl)
  59 {
  60     FocusList *old_head;
  61
  62     old_head = globalconf.focus;
  63     globalconf.focus = fl;
  64     fl->prev = old_head;
  65
  66     return fl;
  67 }
  68
  69 void
  70 focus_add_client(Client *c)
  71 {
  72     FocusList *new_fh;
  73
  74     /* if we don't find this node, create a new one */
  75     if(!(new_fh = focus_get_node_by_client(c)))
  76     {
  77         new_fh = p_new(FocusList, 1);
  78         new_fh->client = c;
  79     }
  80     else /* if we've got a node, detach it */
  81         focus_detach_node(new_fh);
  82
  83     focus_attach_node(new_fh);
  84 }
  85
  86 void
  87 focus_delete_client(Client *c)
  88 {
  89     FocusList *target = focus_get_node_by_client(c);
  90
  91     if(target)
  92     {
  93         focus_detach_node(target);
  94         p_delete(&target);
  95     }
  96 }
  97
  98 static Client *
  99 focus_get_latest_client_for_tags(Tag **t, int nindex)
 100 {
 101     FocusList *fl;
 102     Tag **tags;
 103     int i = 0;
 104
 105     for(fl = globalconf.focus; fl; fl = fl->prev)
 106         if(fl->client && !fl->client->skip)
 107             for(tags = t; *tags; tags++)
 108                 if(is_client_tagged(fl->client, *tags))
 109                 {
 110                     if(i == nindex)
 111                         return fl->client;
 112                     else
 113                         i--;
 114                 }
 115
 116     return NULL;
 117 }
 118
 119 Client *
 120 focus_get_current_client(int screen)
 121 {
 122     Tag **curtags = get_current_tags(screen);
 123     Client *sel = focus_get_latest_client_for_tags(curtags, 0);
 124     p_delete(&curtags);
 125
 126     return sel;
 127 }
 128
 129 /** Jump in focus history stack
 130  * \param screen Screen ID
 131  * \param arg Integer argument
 132  * \ingroup ui_callback
 133  */
 134 void
 135 uicb_focus_history(int screen, char *arg)
 136 {
 137     int i;
 138     Tag **curtags;
 139     Client *c;
 140
 141     if(arg)
 142     {
 143         i = atoi(arg);
 144
 145         if(i < 0)
 146         {
 147             curtags = get_current_tags(screen);
 148             c = focus_get_latest_client_for_tags(curtags, i);
 149             p_delete(&curtags);
 150             if(c)
 151                 focus(c, True, screen);
 152         }
 153     }
 154 }
 155
 156 void
 157 uicb_focus_client_byname(int screen, char *arg)
 158 {
 159     Client *c;
 160     Tag **curtags, **tag;
 161
 162     if(arg)
 163     {
 164         curtags = get_current_tags(screen);
 165         if((c = get_client_byname(globalconf.clients, arg)))
 166            for(tag = curtags; *tag; tag++)
 167                if(is_client_tagged(c, *tag))
 168                    focus(c, True, screen);
 169         p_delete(&curtags);
 170     }
 171 }
 172
 173 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80