plugins/focus.c

   1 #include "../kernel/dispatch.h"
   2 #include "../kernel/screen.h"
   3 #include "../kernel/client.h"
   4 #include "../kernel/stacking.h"
   5
   6 static GSList **focus_order = NULL;
   7
   8 static void events(ObEvent *e, void *foo)
   9 {
  10     guint i;
  11     guint new, old;
  12     GSList *it;
  13
  14     switch (e->type) {
  15     case Event_Client_Mapped:
  16         /* focus new normal windows */
  17         if (client_normal(e->data.c.client))
  18             client_focus(e->data.c.client);
  19         break;
  20
  21     case Event_Ob_NumDesktops:
  22         new = e->data.o.num[0];
  23         old = e->data.o.num[1];
  24         /* free our lists for the desktops which have disappeared */
  25         for (i = new; i < old; ++i)
  26             g_slist_free(focus_order[i]);
  27         /* realloc the array */
  28         focus_order = g_renew(GSList*, focus_order, new);
  29         /* set the new lists to be empty */
  30         for (i = old; i < new; ++i)
  31             focus_order[i] = NULL;
  32         break;
  33
  34     case Event_Client_Desktop:
  35         old = e->data.c.num[1];
  36         if (old != DESKTOP_ALL)
  37             focus_order[old] = g_slist_remove(focus_order[old],
  38                                               e->data.c.client);
  39         else
  40             for (i = 0; i < screen_num_desktops; ++i)
  41                 focus_order[i] = g_slist_remove(focus_order[i],
  42                                                 e->data.c.client);
  43         break;
  44
  45     case Event_Ob_Desktop:
  46         for (it = focus_order[e->data.o.num[0]]; it != NULL; it = it->next)
  47             if (client_focus(it->data))
  48                 break;
  49         break;
  50
  51     case Event_Client_Focus:
  52         /* move to the top of the list */
  53         focus_order[e->data.c.num[1]] =
  54         g_slist_remove(focus_order[e->data.c.num[1]], e->data.c.client);
  55         focus_order[e->data.c.num[1]] =
  56         g_slist_prepend(focus_order[e->data.c.num[1]], e->data.c.client);
  57         break;
  58
  59     default:
  60         g_assert_not_reached();
  61     }
  62 }
  63
  64 void plugin_startup()
  65 {
  66     guint i;
  67
  68     dispatch_register(Event_Client_Mapped | Event_Ob_Desktop |
  69                       Event_Ob_NumDesktops | Event_Client_Focus |
  70                       Event_Client_Desktop, (EventHandler)events, NULL);
  71
  72     focus_order = g_new(GSList*, screen_num_desktops);
  73     for (i = 0; i < screen_num_desktops; ++i)
  74         focus_order[i] = NULL;
  75 }
  76
  77 void plugin_shutdown()
  78 {
  79     guint i;
  80
  81     dispatch_register(0, (EventHandler)events, NULL);
  82
  83     for (i = 0; i < screen_num_desktops; ++i)
  84         g_slist_free(focus_order[i]);
  85     g_free(focus_order);
  86 }