openbox/focus.c

   1 #include "event.h"
   2 #include "config.h"
   3 #include "openbox.h"
   4 #include "client.h"
   5 #include "frame.h"
   6 #include "screen.h"
   7 #include "prop.h"
   8 #include "dispatch.h"
   9 #include "focus.h"
  10
  11 #include <X11/Xlib.h>
  12 #include <glib.h>
  13
  14 Client *focus_client = NULL;
  15 GList **focus_order = NULL; /* these lists are created when screen_startup
  16                                sets the number of desktops */
  17
  18 Window focus_backup = None;
  19
  20 void focus_startup()
  21 {
  22     /* create the window which gets focus when no clients get it. Have to
  23        make it override-redirect so we don't try manage it, since it is
  24        mapped. */
  25     XSetWindowAttributes attrib;
  26
  27     focus_client = NULL;
  28
  29     attrib.override_redirect = TRUE;
  30     focus_backup = XCreateWindow(ob_display, ob_root,
  31                                  -100, -100, 1, 1, 0, 0, InputOnly,
  32                                  CopyFromParent, CWOverrideRedirect, &attrib);
  33     XMapRaised(ob_display, focus_backup);
  34
  35     /* start with nothing focused */
  36     focus_set_client(NULL);
  37 }
  38
  39 void focus_shutdown()
  40 {
  41     guint i;
  42
  43     for (i = 0; i < screen_num_desktops; ++i)
  44         g_list_free(focus_order[i]);
  45     g_free(focus_order);
  46     focus_order = NULL;
  47
  48     XDestroyWindow(ob_display, focus_backup);
  49
  50     /* reset focus to root */
  51     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  52                    event_lasttime);
  53 }
  54
  55 void focus_set_client(Client *client)
  56 {
  57     Window active;
  58     Client *old;
  59     guint desktop;
  60
  61     if (client == focus_client) return;
  62
  63     /* uninstall the old colormap, and install the new one */
  64     screen_install_colormap(focus_client, FALSE);
  65     screen_install_colormap(client, TRUE);
  66
  67     if (client == NULL) {
  68         /* when nothing will be focused, send focus to the backup target */
  69         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  70                        event_lasttime);
  71     }
  72
  73     old = focus_client;
  74     focus_client = client;
  75
  76     /* move to the top of the list */
  77     if (client != NULL) {
  78         desktop = client->desktop;
  79         if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  80         focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  81         focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  82     }
  83
  84     /* set the NET_ACTIVE_WINDOW hint */
  85     active = client ? client->window : None;
  86     PROP_SET32(ob_root, net_active_window, window, active);
  87
  88     if (focus_client != NULL)
  89         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
  90     if (old != NULL)
  91         dispatch_client(Event_Client_Unfocus, old, 0, 0);
  92 }
  93
  94 static gboolean focus_under_pointer()
  95 {
  96     Window w;
  97     int i, x, y;
  98     guint u;
  99     GList *it;
 100
 101     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u))
 102     {
 103         for (it = stacking_list; it != NULL; it = it->next) {
 104             Client *c = it->data;
 105             if (c->desktop == screen_desktop &&
 106                 RECT_CONTAINS(c->frame->area, x, y))
 107                 break;
 108         }
 109         if (it != NULL) {
 110             g_message("fallback (pointer) trying %lx", ((Client*)it->data)->window);
 111             return client_normal(it->data) && client_focus(it->data);
 112         }
 113     }
 114     return FALSE;
 115 }
 116
 117 void focus_fallback(gboolean switching_desks)
 118 {
 119     ConfigValue focus_follow;
 120     GList *it;
 121     gboolean under = TRUE;
 122
 123     if (!switching_desks) {
 124         if (!config_get("focusFollowsMouse", Config_Bool, &focus_follow))
 125             g_assert_not_reached();
 126         if (focus_follow.bool)
 127             under = focus_under_pointer();
 128     }
 129
 130     if (!under) {
 131         for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 132             if (it->data != focus_client && client_normal(it->data)) {
 133                 g_message("fallback trying %lx", ((Client*)it->data)->window);
 134                 if (client_focus(it->data))
 135                     break;
 136             }
 137         if (it == NULL) /* nothing to focus */
 138             focus_set_client(NULL);
 139     }
 140 }