plugins/focus.c

   1 #include "../kernel/dispatch.h"
   2 #include "../kernel/screen.h"
   3 #include "../kernel/client.h"
   4 #include "../kernel/focus.h"
   5 #include "../kernel/stacking.h"
   6 #include "../kernel/openbox.h"
   7
   8 static GSList **focus_order = NULL;
   9
  10 static void focus_fallback(guint desk, gboolean warp)
  11 {
  12     GSList *it;
  13
  14     for (it = focus_order[desk]; it != NULL; it = it->next)
  15         if (client_focus(it->data)) {
  16             if (warp) { /* XXX make this configurable */
  17                 Client *c = it->data;
  18                 XWarpPointer(ob_display, None, c->window, 0, 0, 0, 0,
  19                              c->area.width / 2, c->area.height / 2);
  20             }
  21             break;
  22         }
  23 }
  24
  25 static void events(ObEvent *e, void *foo)
  26 {
  27     guint i;
  28     guint new, old;
  29
  30     switch (e->type) {
  31     case Event_Client_Mapped:
  32         /* focus new normal windows */
  33         if (client_normal(e->data.c.client))
  34             client_focus(e->data.c.client);
  35         break;
  36
  37     case Event_Client_Destroy:
  38         i = e->data.c.client->desktop;
  39         focus_order[i] = g_slist_remove(focus_order[i], e->data.c.client);
  40         break;
  41
  42     case Event_Ob_NumDesktops:
  43         new = e->data.o.num[0];
  44         old = e->data.o.num[1];
  45         /* free our lists for the desktops which have disappeared */
  46         for (i = new; i < old; ++i)
  47             g_slist_free(focus_order[i]);
  48         /* realloc the array */
  49         focus_order = g_renew(GSList*, focus_order, new);
  50         /* set the new lists to be empty */
  51         for (i = old; i < new; ++i)
  52             focus_order[i] = NULL;
  53         break;
  54
  55     case Event_Client_Desktop:
  56         old = e->data.c.num[1];
  57         if (old != DESKTOP_ALL)
  58             focus_order[old] = g_slist_remove(focus_order[old],
  59                                               e->data.c.client);
  60         else
  61             for (i = 0; i < screen_num_desktops; ++i)
  62                 focus_order[i] = g_slist_remove(focus_order[i],
  63                                                 e->data.c.client);
  64         break;
  65
  66     case Event_Ob_Desktop:
  67         /* focus the next available target */
  68         focus_fallback(e->data.o.num[0], TRUE);
  69         break;
  70
  71     case Event_Client_Unfocus:
  72         /* nothing is left with focus! */
  73         if (focus_client == NULL)
  74             /* focus the next available target */
  75             focus_fallback(screen_desktop, FALSE);
  76         break;
  77
  78     case Event_Client_Focus:
  79         /* move to the top of the list */
  80         focus_order[e->data.c.num[1]] =
  81         g_slist_remove(focus_order[e->data.c.num[1]], e->data.c.client);
  82         focus_order[e->data.c.num[1]] =
  83         g_slist_prepend(focus_order[e->data.c.num[1]], e->data.c.client);
  84         break;
  85
  86     case Event_X_EnterNotify:
  87         if (e->data.x.client && client_normal(e->data.x.client))
  88             client_focus(e->data.x.client);
  89         break;
  90
  91     default:
  92         g_assert_not_reached();
  93     }
  94 }
  95
  96 void plugin_startup()
  97 {
  98     guint i;
  99
 100     dispatch_register(Event_Client_Mapped | Event_Client_Destroy |
 101                       Event_Ob_Desktop | Event_Ob_NumDesktops |
 102                       Event_Client_Focus | Event_Client_Unfocus |
 103                       Event_X_EnterNotify |
 104                       Event_Client_Desktop,
 105                       (EventHandler)events, NULL);
 106
 107     focus_order = g_new(GSList*, screen_num_desktops);
 108     for (i = 0; i < screen_num_desktops; ++i)
 109         focus_order[i] = NULL;
 110 }
 111
 112 void plugin_shutdown()
 113 {
 114     guint i;
 115
 116     dispatch_register(0, (EventHandler)events, NULL);
 117
 118     for (i = 0; i < screen_num_desktops; ++i)
 119         g_slist_free(focus_order[i]);
 120     g_free(focus_order);
 121 }