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