openbox/focus.c

   1 #include "openbox.h"
   2 #include "client.h"
   3 #include "screen.h"
   4 #include "prop.h"
   5 #include "dispatch.h"
   6
   7 #include <X11/Xlib.h>
   8 #include <glib.h>
   9
  10 Client *focus_client = NULL;
  11 GList **focus_order = NULL;
  12
  13 Window focus_backup = None;
  14
  15 void focus_set_client(Client *client);
  16
  17 void focus_startup()
  18 {
  19     guint i;
  20
  21     /* create the window which gets focus when no clients get it. Have to
  22        make it override-redirect so we don't try manage it, since it is
  23        mapped. */
  24     XSetWindowAttributes attrib;
  25
  26     attrib.override_redirect = TRUE;
  27     focus_backup = XCreateWindow(ob_display, ob_root,
  28                                  -100, -100, 1, 1, 0, 0, InputOnly,
  29                                  CopyFromParent, CWOverrideRedirect, &attrib);
  30     XMapRaised(ob_display, focus_backup);
  31
  32     focus_order = g_new(GList*, screen_num_desktops);
  33     for (i = 0; i < screen_num_desktops; ++i)
  34         focus_order[i] = NULL;
  35
  36     /* start with nothing focused */
  37     focus_set_client(NULL);
  38 }
  39
  40 void focus_shutdown()
  41 {
  42     guint i;
  43
  44     for (i = 0; i < screen_num_desktops; ++i)
  45         g_list_free(focus_order[i]);
  46     g_free(focus_order);
  47
  48     /* reset focus to root */
  49     XSetInputFocus(ob_display, PointerRoot, RevertToNone, CurrentTime);
  50 }
  51
  52 void focus_set_client(Client *client)
  53 {
  54     Window active;
  55     Client *old;
  56     guint desktop;
  57
  58     /* uninstall the old colormap, and install the new one */
  59     screen_install_colormap(focus_client, FALSE);
  60     screen_install_colormap(client, TRUE);
  61
  62
  63     if (client == NULL) {
  64         /* when nothing will be focused, send focus to the backup target */
  65         XSetInputFocus(ob_display, focus_backup, RevertToNone, CurrentTime);
  66     }
  67
  68     old = focus_client;
  69     focus_client = client;
  70
  71     /* move to the top of the list */
  72     if (client != NULL) {
  73         desktop = client->desktop;
  74         if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  75         focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  76         focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  77     }
  78
  79     /* set the NET_ACTIVE_WINDOW hint */
  80     active = client ? client->window : None;
  81     PROP_SET32(ob_root, net_active_window, window, active);
  82
  83     if (focus_client != NULL)
  84         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
  85     if (old != NULL)
  86         dispatch_client(Event_Client_Unfocus, old, 0, 0);
  87 }