Dogcows Code - chaz/openbox/blob - openbox/stacking.c

   1 #include "openbox.h"
   2 #include "prop.h"
   3 #include "focus.h"
   4 #include "client.h"
   5 #include "group.h"
   6 #include "frame.h"
   7 #include "window.h"
   8 #include <glib.h>
   9
  10 GList  *stacking_list = NULL;
  11
  12 void stacking_set_list()
  13 {
  14     Window *windows, *win_it;
  15     GList *it;
  16     guint size = g_list_length(stacking_list);
  17
  18     /* on shutdown, don't update the properties, so that we can read it back
  19        in on startup and re-stack the windows as they were before we shut down
  20     */
  21     if (ob_state == State_Exiting) return;
  22
  23     /* create an array of the window ids (from bottom to top,
  24        reverse order!) */
  25     if (size > 0) {
  26         windows = g_new(Window, size);
  27         win_it = windows;
  28         for (it = g_list_last(stacking_list); it != NULL;
  29              it = it->prev)
  30             if (WINDOW_IS_CLIENT(it->data)) {
  31                 *win_it = WINDOW_AS_CLIENT(it->data)->window;
  32                 ++win_it;
  33             }
  34     } else
  35         windows = win_it = NULL;
  36
  37     PROP_SETA32(ob_root, net_client_list_stacking, window,
  38                 (guint32*)windows, win_it - windows);
  39
  40     if (windows)
  41         g_free(windows);
  42 }
  43
  44 static void do_restack(GList *wins, GList *before)
  45 {
  46     GList *it, *next;
  47     Window *win;
  48     int i;
  49
  50     /* pls only restack stuff in the same layer at a time */
  51     for (it = wins; it; it = next) {
  52         next = g_list_next(it);
  53         if (!next) break;
  54         g_assert (window_layer(it->data) == window_layer(next->data));
  55     }
  56
  57
  58     win = g_new(Window, g_list_length(wins) + 1);
  59
  60     if (before == stacking_list)
  61         win[0] = focus_backup;
  62     else if (!before)
  63         win[0] = window_top(g_list_last(stacking_list)->data);
  64     else
  65         win[0] = window_top(g_list_previous(before)->data);
  66
  67     for (i = 1, it = wins; it; ++i, it = g_list_next(it)) {
  68         win[i] = window_top(it->data);
  69         stacking_list = g_list_insert_before(stacking_list, before, it->data);
  70     }
  71
  72     /* XXX some debug checking of the stacking list's order */
  73     for (it = stacking_list; ; it = next) {
  74         next = g_list_next(it);
  75         if (!next) break;
  76         g_assert(window_layer(it->data) >= window_layer(next->data));
  77     }
  78
  79     XRestackWindows(ob_display, win, i);
  80     g_free(win);
  81 }
  82
  83 static void raise(GList *wins)
  84 {
  85     GList *it;
  86     GList *layer[NUM_STACKLAYER] = {NULL};
  87     int i;
  88
  89     for (it = wins; it; it = g_list_next(it)) {
  90         StackLayer l;
  91
  92         l = window_layer(it->data);
  93         layer[l] = g_list_append(layer[l], it->data);
  94     }
  95
  96     it = stacking_list;
  97     for (i = NUM_STACKLAYER - 1; i >= 0; --i) {
  98         if (layer[i]) {
  99             for (; it; it = g_list_next(it)) {
 100                 /* look for the top of the layer */
 101                 if (window_layer(it->data) <= (StackLayer) i)
 102                     break;
 103             }
 104             do_restack(layer[i], it);
 105             g_list_free(layer[i]);
 106         }
 107     }
 108 }
 109
 110 static void lower(GList *wins)
 111 {
 112     GList *it;
 113     GList *layer[NUM_STACKLAYER] = {NULL};
 114     int i;
 115
 116     for (it = wins; it; it = g_list_next(it)) {
 117         StackLayer l;
 118
 119         l = window_layer(it->data);
 120         layer[l] = g_list_append(layer[l], it->data);
 121     }
 122
 123     it = stacking_list;
 124     for (i = NUM_STACKLAYER - 1; i >= 0; --i) {
 125         if (layer[i]) {
 126             for (; it; it = g_list_next(it)) {
 127                 /* look for the top of the next layer down */
 128                 if (window_layer(it->data) < (StackLayer) i)
 129                     break;
 130             }
 131             do_restack(layer[i], it);
 132             g_list_free(layer[i]);
 133         }
 134     }
 135 }
 136
 137 static GList *pick_windows(ObWindow *win)
 138 {
 139     GList *ret = NULL;
 140     GList *it, *next;
 141     GSList *sit;
 142     Client *c;
 143     int i, n;
 144
 145     if (!WINDOW_IS_CLIENT(win)) {
 146         ret = g_list_append(ret, win);
 147         stacking_list = g_list_remove(stacking_list, win);
 148         return ret;
 149     }
 150
 151     c = WINDOW_AS_CLIENT(win);
 152
 153     /* remove first so we can't run into ourself */
 154     stacking_list = g_list_remove(stacking_list, win);
 155
 156     /* add transient children in their stacking order */
 157     i = 0;
 158     n = g_slist_length(c->transients);
 159     for (it = stacking_list; i < n && it; it = next) {
 160         next = g_list_next(it);
 161         if ((sit = g_slist_find(c->transients, it->data))) {
 162             ++i;
 163             ret = g_list_concat(ret, pick_windows(sit->data));
 164             it = stacking_list;
 165         }
 166     }
 167
 168     /* add itself */
 169     ret = g_list_append(ret, win);
 170
 171     return ret;
 172 }
 173
 174 static GList *pick_group_windows(ObWindow *win)
 175 {
 176     GList *ret = NULL;
 177     GList *it, *next;
 178     GSList *sit;
 179     Client *c;
 180     int i, n;
 181
 182     if (!WINDOW_IS_CLIENT(win))
 183         return NULL;
 184
 185     c = WINDOW_AS_CLIENT(win);
 186
 187     /* add group members in their stacking order */
 188     if (c->group) {
 189         i = 0;
 190         n = g_slist_length(c->group->members) - 1;
 191         for (it = stacking_list; i < n && it; it = next) {
 192             next = g_list_next(it);
 193             if ((sit = g_slist_find(c->group->members, it->data))) {
 194                 ++i;
 195                 ret = g_list_concat(ret, pick_windows(sit->data));
 196                 it = stacking_list;
 197             }
 198         }
 199     }
 200     return ret;
 201 }
 202
 203 static ObWindow *top_transient(ObWindow *window)
 204 {
 205     Client *client;
 206
 207     if (!WINDOW_IS_CLIENT(window))
 208         return window;
 209
 210     client = WINDOW_AS_CLIENT(window);
 211
 212     /* move up the transient chain as far as possible */
 213     if (client->transient_for) {
 214         if (client->transient_for != TRAN_GROUP) {
 215             return top_transient(CLIENT_AS_WINDOW(client->transient_for));
 216         } else {
 217             GSList *it;
 218
 219             for (it = client->group->members; it; it = it->next) {
 220                 Client *c = it->data;
 221
 222                 /* checking transient_for prevents infinate loops! */
 223                 if (c != client && !c->transient_for)
 224                     break;
 225             }
 226             if (it)
 227                 return it->data;
 228         }
 229     }
 230
 231     return window;
 232 }
 233
 234 void stacking_raise(ObWindow *window)
 235 {
 236     GList *wins;
 237
 238     window = top_transient(window);
 239     wins = pick_windows(window);
 240     wins = g_list_concat(wins, pick_group_windows(window));
 241     raise(wins);
 242     g_list_free(wins);
 243 }
 244
 245 void stacking_lower(ObWindow *window)
 246 {
 247     GList *wins;
 248
 249     window = top_transient(window);
 250     wins = pick_windows(window);
 251     wins = g_list_concat(wins, pick_group_windows(window));
 252     lower(wins);
 253     g_list_free(wins);
 254 }
 255
 256 void stacking_add(ObWindow *win)
 257 {
 258     StackLayer l;
 259     GList *wins, *it;
 260
 261     l = window_layer(win);
 262     wins = g_list_append(NULL, win); /* list of 1 element */
 263
 264     for (it = stacking_list; it; it = g_list_next(it))
 265         if (window_layer(it->data) <= l)
 266             break;
 267     do_restack(wins, it);
 268     g_list_free(wins);
 269
 270     stacking_raise(win);
 271 }
 272
 273 void stacking_add_nonintrusive(ObWindow *win)
 274 {
 275     Client *client;
 276     Client *parent = NULL;
 277     GList *it_before = NULL;
 278
 279     if (!WINDOW_IS_CLIENT(win)) {
 280         stacking_add(win); /* no special rules for others */
 281         return;
 282     }
 283
 284     client = WINDOW_AS_CLIENT(win);
 285
 286     /* insert above its highest parent */
 287     if (client->transient_for) {
 288         if (client->transient_for != TRAN_GROUP) {
 289             parent = client->transient_for;
 290         } else {
 291             GSList *sit;
 292             GList *it;
 293
 294             if (client->group)
 295                 for (it = stacking_list; !parent && it; it = it->next) {
 296                     if ((sit = g_slist_find(client->group->members, it->data)))
 297                 for (sit = client->group->members; !parent && sit;
 298                      sit = sit->next) {
 299                     Client *c = sit->data;
 300                     /* checking transient_for prevents infinate loops! */
 301                     if (sit->data == it->data && !c->transient_for)
 302                         parent = it->data;
 303                 }
 304             }
 305         }
 306     }
 307
 308     if (!(it_before = g_list_find(stacking_list, parent))) {
 309         /* no parent to put above, try find the focused client to go
 310            under */
 311         if (focus_client && focus_client->layer == client->layer) {
 312             if ((it_before = g_list_find(stacking_list, focus_client)))
 313                 it_before = it_before->next;
 314         }
 315     }
 316     if (!it_before) {
 317         /* out of ideas, just add it normally... */
 318         stacking_add(win);
 319     } else {
 320         GList *wins = g_list_append(NULL, win);
 321         do_restack(wins, it_before);
 322         g_list_free(wins);
 323     }
 324 }