openbox/focus.c

   1 #include "event.h"
   2 #include "openbox.h"
   3 #include "client.h"
   4 #include "config.h"
   5 #include "frame.h"
   6 #include "screen.h"
   7 #include "group.h"
   8 #include "prop.h"
   9 #include "dispatch.h"
  10 #include "focus.h"
  11 #include "parse.h"
  12 #include "engine.h"
  13
  14 #include <X11/Xlib.h>
  15 #include <glib.h>
  16
  17 Client *focus_client = NULL;
  18 GList **focus_order = NULL; /* these lists are created when screen_startup
  19                                sets the number of desktops */
  20
  21 Window focus_backup = None;
  22
  23 static gboolean noreorder = 0;
  24
  25 void focus_startup()
  26 {
  27     /* create the window which gets focus when no clients get it. Have to
  28        make it override-redirect so we don't try manage it, since it is
  29        mapped. */
  30     XSetWindowAttributes attrib;
  31
  32     focus_client = NULL;
  33
  34     attrib.override_redirect = TRUE;
  35     focus_backup = XCreateWindow(ob_display, ob_root,
  36                                  -100, -100, 1, 1, 0,
  37                                  CopyFromParent, InputOutput, CopyFromParent,
  38                                  CWOverrideRedirect, &attrib);
  39     XMapRaised(ob_display, focus_backup);
  40
  41     /* start with nothing focused */
  42     focus_set_client(NULL);
  43 }
  44
  45 void focus_shutdown()
  46 {
  47     guint i;
  48
  49     for (i = 0; i < screen_num_desktops; ++i)
  50         g_list_free(focus_order[i]);
  51     g_free(focus_order);
  52     focus_order = NULL;
  53
  54     XDestroyWindow(ob_display, focus_backup);
  55
  56     /* reset focus to root */
  57     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  58                    event_lasttime);
  59 }
  60
  61 static void push_to_top(Client *client)
  62 {
  63     guint desktop;
  64
  65     desktop = client->desktop;
  66     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  67     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  68     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  69 }
  70
  71 void focus_set_client(Client *client)
  72 {
  73     Window active;
  74     Client *old;
  75
  76     /* uninstall the old colormap, and install the new one */
  77     screen_install_colormap(focus_client, FALSE);
  78     screen_install_colormap(client, TRUE);
  79
  80     if (client == NULL) {
  81         /* when nothing will be focused, send focus to the backup target */
  82         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  83                        event_lasttime);
  84         XSync(ob_display, FALSE);
  85     }
  86
  87     old = focus_client;
  88     focus_client = client;
  89
  90     /* move to the top of the list */
  91     if (noreorder)
  92         --noreorder;
  93     else if (client != NULL)
  94         push_to_top(client);
  95
  96     /* set the NET_ACTIVE_WINDOW hint */
  97     active = client ? client->window : None;
  98     PROP_SET32(ob_root, net_active_window, window, active);
  99
 100     if (focus_client != NULL)
 101         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 102     if (old != NULL)
 103         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 104 }
 105
 106 static gboolean focus_under_pointer()
 107 {
 108     Window w;
 109     int i, x, y;
 110     guint u;
 111     GList *it;
 112
 113     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 114         for (it = stacking_list; it != NULL; it = it->next) {
 115             Client *c = it->data;
 116             if (c->desktop == screen_desktop &&
 117                 RECT_CONTAINS(c->frame->area, x, y))
 118                 break;
 119         }
 120         if (it != NULL)
 121             return client_normal(it->data) && client_focus(it->data);
 122     }
 123     return FALSE;
 124 }
 125
 126 void focus_fallback(FallbackType type)
 127 {
 128     GList *it;
 129     Client *old = NULL;
 130
 131     old = focus_client;
 132
 133     /* unfocus any focused clients.. they can be focused by Pointer events
 134        and such, and then when I try focus them, I won't get a FocusIn event
 135        at all for them.
 136     */
 137     focus_set_client(NULL);
 138
 139     if (!(type == Fallback_Desktop ?
 140           config_focus_last_on_desktop : config_focus_last)) {
 141         if (config_focus_follow) focus_under_pointer();
 142         return;
 143     }
 144
 145     if (type == Fallback_Unfocusing && old && old->transient_for) {
 146         if (old->transient_for == TRAN_GROUP) {
 147             for (it = focus_order[screen_desktop]; it != NULL; it = it->next) {
 148                 GSList *sit;
 149
 150                 for (sit = old->group->members; sit; sit = sit->next)
 151                     if (sit->data == it->data && client_focus(sit->data))
 152                         return;
 153             }
 154         } else {
 155             if (client_normal(old->transient_for))
 156                 if (client_focus(old->transient_for))
 157                     return;
 158         }
 159     }
 160
 161     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 162         if (type != Fallback_Unfocusing || it->data != old)
 163             if (client_normal(it->data) && client_focus(it->data))
 164                 return;
 165
 166     /* nothing to focus */
 167     focus_set_client(NULL);
 168 }
 169
 170 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 171                  gboolean cancel)
 172 {
 173     static Client *first = NULL;
 174     static Client *t = NULL;
 175     static GList *order = NULL;
 176     GList *it, *start, *list;
 177     Client *ft;
 178
 179     if (cancel) {
 180         if (first) client_focus(first);
 181         goto done_cycle;
 182     } else if (done) {
 183         if (focus_client) {
 184             push_to_top(focus_client); /* move to top of focus_order */
 185             stacking_raise(focus_client);
 186         }
 187         goto done_cycle;
 188     }
 189     if (!first) first = focus_client;
 190
 191     if (linear) list = client_list;
 192     else        list = focus_order[screen_desktop];
 193
 194     start = it = g_list_find(list, focus_client);
 195     if (!start) /* switched desktops or something? */
 196         start = it = forward ? g_list_last(list) : g_list_first(list);
 197     if (!start) goto done_cycle;
 198
 199     do {
 200         if (forward) {
 201             it = it->next;
 202             if (it == NULL) it = list;
 203         } else {
 204             it = it->prev;
 205             if (it == NULL) it = g_list_last(list);
 206         }
 207         ft = client_focus_target(it->data);
 208         if (ft == it->data && focus_client != ft && client_normal(ft) &&
 209             client_focus(ft)) {
 210             noreorder++; /* avoid reordering the focus_order */
 211             return ft;
 212         }
 213     } while (it != start);
 214     return NULL;
 215
 216 done_cycle:
 217     t = NULL;
 218     first = NULL;
 219     g_list_free(order);
 220     order = NULL;
 221     return NULL;
 222 }