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