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,
  32                                  CopyFromParent, InputOutput, CopyFromParent,
  33                                  CWOverrideRedirect, &attrib);
  34     XMapRaised(ob_display, focus_backup);
  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     focus_order = NULL;
  48
  49     XDestroyWindow(ob_display, focus_backup);
  50
  51     /* reset focus to root */
  52     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  53                    event_lasttime);
  54 }
  55
  56 void focus_set_client(Client *client)
  57 {
  58     Window active;
  59     Client *old;
  60     guint desktop;
  61
  62     /* uninstall the old colormap, and install the new one */
  63     screen_install_colormap(focus_client, FALSE);
  64     screen_install_colormap(client, TRUE);
  65
  66     if (client == NULL) {
  67         /* when nothing will be focused, send focus to the backup target */
  68         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  69                        event_lasttime);
  70     }
  71
  72     old = focus_client;
  73     focus_client = client;
  74
  75     /* move to the top of the list */
  76     if (client != NULL) {
  77         desktop = client->desktop;
  78         if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  79         focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  80         focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  81     }
  82
  83     /* set the NET_ACTIVE_WINDOW hint */
  84     active = client ? client->window : None;
  85     PROP_SET32(ob_root, net_active_window, window, active);
  86
  87     if (focus_client != NULL)
  88         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
  89     if (old != NULL)
  90         dispatch_client(Event_Client_Unfocus, old, 0, 0);
  91 }
  92
  93 static gboolean focus_under_pointer()
  94 {
  95     Window w;
  96     int i, x, y;
  97     guint u;
  98     GList *it;
  99
 100     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 101         for (it = stacking_list; it != NULL; it = it->next) {
 102             Client *c = it->data;
 103             if (c->desktop == screen_desktop &&
 104                 RECT_CONTAINS(c->frame->area, x, y))
 105                 break;
 106         }
 107         if (it != NULL)
 108             return client_normal(it->data) && client_focus(it->data);
 109     }
 110     return FALSE;
 111 }
 112
 113 void focus_fallback(gboolean switching_desks)
 114 {
 115     ConfigValue focus_follow;
 116     GList *it;
 117     gboolean under = FALSE;
 118
 119     if (switching_desks) {
 120         /* don't skip any windows when switching desktops */
 121         focus_client = NULL;
 122     } else {
 123         if (!config_get("focusFollowsMouse", Config_Bool, &focus_follow))
 124             g_assert_not_reached();
 125         if (focus_follow.bool)
 126             under = focus_under_pointer();
 127     }
 128
 129     if (!under) {
 130         for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 131             if (it->data != focus_client && client_normal(it->data))
 132                 if (client_focus(it->data))
 133                     break;
 134         if (it == NULL) /* nothing to focus */
 135             focus_set_client(NULL);
 136     }
 137 }