openbox/focus.c

   1 #include "event.h"
   2 #include "openbox.h"
   3 #include "client.h"
   4 #include "frame.h"
   5 #include "screen.h"
   6 #include "group.h"
   7 #include "prop.h"
   8 #include "dispatch.h"
   9 #include "focus.h"
  10 #include "parse.h"
  11 #include "engine.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 gboolean focus_new = TRUE;
  22 gboolean focus_follow = FALSE;
  23 static gboolean focus_last = TRUE;
  24 static gboolean focus_last_on_desktop = TRUE;
  25
  26 static gboolean noreorder = 0;
  27
  28 static void parse_assign(char *name, ParseToken *value)
  29 {
  30     if (!g_ascii_strcasecmp(name, "focusnew")) {
  31         if (value->type != TOKEN_BOOL)
  32             yyerror("invalid value");
  33         else {
  34             focus_new = value->data.bool;
  35         }
  36     } else if (!g_ascii_strcasecmp(name, "followmouse")) {
  37         if (value->type != TOKEN_BOOL)
  38             yyerror("invalid value");
  39         else {
  40             focus_follow = value->data.bool;
  41         }
  42     } else if (!g_ascii_strcasecmp(name, "focuslast")) {
  43         if (value->type != TOKEN_BOOL)
  44             yyerror("invalid value");
  45         else {
  46             focus_last = value->data.bool;
  47         }
  48     } else if (!g_ascii_strcasecmp(name, "focuslastondesktop")) {
  49         if (value->type != TOKEN_BOOL)
  50             yyerror("invalid value");
  51         else {
  52             focus_last_on_desktop = value->data.bool;
  53         }
  54     } else
  55         yyerror("invalid option");
  56     parse_free_token(value);
  57 }
  58
  59 void focus_startup()
  60 {
  61     /* create the window which gets focus when no clients get it. Have to
  62        make it override-redirect so we don't try manage it, since it is
  63        mapped. */
  64     XSetWindowAttributes attrib;
  65
  66     focus_client = NULL;
  67     focus_new = TRUE;
  68     focus_follow = FALSE;
  69     focus_last = TRUE;
  70     focus_last_on_desktop = TRUE;
  71
  72     attrib.override_redirect = TRUE;
  73     focus_backup = XCreateWindow(ob_display, ob_root,
  74                                  -100, -100, 1, 1, 0,
  75                                  CopyFromParent, InputOutput, CopyFromParent,
  76                                  CWOverrideRedirect, &attrib);
  77     XMapRaised(ob_display, focus_backup);
  78
  79     /* start with nothing focused */
  80     focus_set_client(NULL);
  81
  82     parse_reg_section("focus", NULL, parse_assign);
  83 }
  84
  85 void focus_shutdown()
  86 {
  87     guint i;
  88
  89     for (i = 0; i < screen_num_desktops; ++i)
  90         g_list_free(focus_order[i]);
  91     g_free(focus_order);
  92     focus_order = NULL;
  93
  94     XDestroyWindow(ob_display, focus_backup);
  95
  96     /* reset focus to root */
  97     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  98                    event_lasttime);
  99 }
 100
 101 static void push_to_top(Client *client)
 102 {
 103     guint desktop;
 104
 105     desktop = client->desktop;
 106     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
 107     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
 108     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
 109 }
 110
 111 void focus_set_client(Client *client)
 112 {
 113     Window active;
 114     Client *old;
 115
 116     /* uninstall the old colormap, and install the new one */
 117     screen_install_colormap(focus_client, FALSE);
 118     screen_install_colormap(client, TRUE);
 119
 120     if (client == NULL) {
 121         /* when nothing will be focused, send focus to the backup target */
 122         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
 123                        event_lasttime);
 124         XSync(ob_display, FALSE);
 125     }
 126
 127     old = focus_client;
 128     focus_client = client;
 129
 130     /* move to the top of the list */
 131     if (noreorder)
 132         --noreorder;
 133     else if (client != NULL)
 134         push_to_top(client);
 135
 136     /* set the NET_ACTIVE_WINDOW hint */
 137     active = client ? client->window : None;
 138     PROP_SET32(ob_root, net_active_window, window, active);
 139
 140     if (focus_client != NULL)
 141         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 142     if (old != NULL)
 143         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 144 }
 145
 146 static gboolean focus_under_pointer()
 147 {
 148     Window w;
 149     int i, x, y;
 150     guint u;
 151     GList *it;
 152
 153     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 154         for (it = stacking_list; it != NULL; it = it->next) {
 155             Client *c = it->data;
 156             if (c->desktop == screen_desktop &&
 157                 RECT_CONTAINS(c->frame->area, x, y))
 158                 break;
 159         }
 160         if (it != NULL)
 161             return client_normal(it->data) && client_focus(it->data);
 162     }
 163     return FALSE;
 164 }
 165
 166 void focus_fallback(gboolean switching_desks)
 167 {
 168     GList *it;
 169     Client *old = NULL;
 170
 171     old = focus_client;
 172
 173     /* unfocus any focused clients.. they can be focused by Pointer events
 174        and such, and then when I try focus them, I won't get a FocusIn event
 175        at all for them.
 176     */
 177     focus_set_client(NULL);
 178
 179     if (switching_desks) {
 180         /* don't skip any windows when switching desktops */
 181         old = NULL;
 182     }
 183
 184     if (!(switching_desks ? focus_last_on_desktop : focus_last)) {
 185         if (focus_follow) focus_under_pointer();
 186         return;
 187     }
 188
 189     if (old && old->transient_for) {
 190         if (old->transient_for == TRAN_GROUP) {
 191             for (it = focus_order[screen_desktop]; it != NULL; it = it->next) {
 192                 GSList *sit;
 193
 194                 for (sit = old->group->members; sit; sit = sit->next)
 195                     if (sit->data == it->data && client_focus(sit->data))
 196                         return;
 197             }
 198         } else {
 199             if (client_focus(old->transient_for))
 200                 return;
 201         }
 202     }
 203
 204     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 205         if (it->data != old && client_normal(it->data))
 206             if (client_focus(it->data))
 207                 return;
 208
 209     /* nothing to focus */
 210     focus_set_client(NULL);
 211 }
 212
 213 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 214                  gboolean cancel)
 215 {
 216     static Client *first = NULL;
 217     static Client *t = NULL;
 218     static GList *order = NULL;
 219     GList *it, *start, *list;
 220     Client *ft;
 221
 222     if (cancel) {
 223         if (first) client_focus(first);
 224         goto done_cycle;
 225     } else if (done) {
 226         if (focus_client) {
 227             push_to_top(focus_client); /* move to top of focus_order */
 228             stacking_raise(focus_client);
 229         }
 230         goto done_cycle;
 231     }
 232     if (!first) first = focus_client;
 233
 234     if (linear) list = client_list;
 235     else        list = focus_order[screen_desktop];
 236
 237     start = it = g_list_find(list, focus_client);
 238     if (!start) /* switched desktops or something? */
 239         start = it = forward ? g_list_last(list) : g_list_first(list);
 240     if (!start) goto done_cycle;
 241
 242     do {
 243         if (forward) {
 244             it = it->next;
 245             if (it == NULL) it = list;
 246         } else {
 247             it = it->prev;
 248             if (it == NULL) it = g_list_last(list);
 249         }
 250         ft = client_focus_target(it->data);
 251         if (ft == it->data && focus_client != ft && client_normal(ft) &&
 252             client_focusable(ft)) {
 253             if (client_focus(ft)) {
 254                 noreorder++; /* avoid reordering the focus_order */
 255                 return ft;
 256             }
 257         }
 258     } while (it != start);
 259     return NULL;
 260
 261 done_cycle:
 262     t = NULL;
 263     first = NULL;
 264     g_list_free(order);
 265     order = NULL;
 266     return NULL;
 267 }