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

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    stacking.c for the Openbox window manager
   4    Copyright (c) 2003        Ben Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "openbox.h"
  20 #include "prop.h"
  21 #include "screen.h"
  22 #include "focus.h"
  23 #include "client.h"
  24 #include "group.h"
  25 #include "frame.h"
  26 #include "window.h"
  27
  28 GList  *stacking_list = NULL;
  29
  30 void stacking_set_list()
  31 {
  32     Window *windows = NULL;
  33     GList *it;
  34     guint i = 0;
  35
  36     /* on shutdown, don't update the properties, so that we can read it back
  37        in on startup and re-stack the windows as they were before we shut down
  38     */
  39     if (ob_state() == OB_STATE_EXITING) return;
  40
  41     /* create an array of the window ids (from bottom to top,
  42        reverse order!) */
  43     if (stacking_list) {
  44         windows = g_new(Window, g_list_length(stacking_list));
  45         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
  46             if (WINDOW_IS_CLIENT(it->data))
  47                 windows[i++] = WINDOW_AS_CLIENT(it->data)->window;
  48         }
  49     }
  50
  51     PROP_SETA32(RootWindow(ob_display, ob_screen),
  52                 net_client_list_stacking, window, (gulong*)windows, i);
  53
  54     g_free(windows);
  55 }
  56
  57 static void do_restack(GList *wins, GList *before)
  58 {
  59     GList *it;
  60     Window *win;
  61     gint i;
  62
  63 #ifdef DEBUG
  64     GList *next;
  65     /* pls only restack stuff in the same layer at a time */
  66     for (it = wins; it; it = next) {
  67         next = g_list_next(it);
  68         if (!next) break;
  69         g_assert (window_layer(it->data) == window_layer(next->data));
  70     }
  71     if (before)
  72         g_assert(window_layer(it->data) >= window_layer(before->data));
  73 #endif
  74
  75     win = g_new(Window, g_list_length(wins) + 1);
  76
  77     if (before == stacking_list)
  78         win[0] = screen_support_win;
  79     else if (!before)
  80         win[0] = window_top(g_list_last(stacking_list)->data);
  81     else
  82         win[0] = window_top(g_list_previous(before)->data);
  83
  84     for (i = 1, it = wins; it; ++i, it = g_list_next(it)) {
  85         win[i] = window_top(it->data);
  86         g_assert(win[i] != None); /* better not call stacking shit before
  87                                      setting your top level window value */
  88         stacking_list = g_list_insert_before(stacking_list, before, it->data);
  89     }
  90
  91 #ifdef DEBUG
  92     /* some debug checking of the stacking list's order */
  93     for (it = stacking_list; ; it = next) {
  94         next = g_list_next(it);
  95         if (!next) break;
  96         g_assert(window_layer(it->data) >= window_layer(next->data));
  97     }
  98 #endif
  99
 100     XRestackWindows(ob_display, win, i);
 101     g_free(win);
 102
 103     stacking_set_list();
 104 }
 105
 106 static void do_raise(GList *wins)
 107 {
 108     GList *it;
 109     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 110     gint i;
 111
 112     for (it = wins; it; it = g_list_next(it)) {
 113         ObStackingLayer l;
 114
 115         l = window_layer(it->data);
 116         layer[l] = g_list_append(layer[l], it->data);
 117     }
 118
 119     it = stacking_list;
 120     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 121         if (layer[i]) {
 122             for (; it; it = g_list_next(it)) {
 123                 /* look for the top of the layer */
 124                 if (window_layer(it->data) <= (ObStackingLayer) i)
 125                     break;
 126             }
 127             do_restack(layer[i], it);
 128             g_list_free(layer[i]);
 129         }
 130     }
 131 }
 132
 133 static void do_lower(GList *wins)
 134 {
 135     GList *it;
 136     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 137     gint i;
 138
 139     for (it = wins; it; it = g_list_next(it)) {
 140         ObStackingLayer l;
 141
 142         l = window_layer(it->data);
 143         layer[l] = g_list_append(layer[l], it->data);
 144     }
 145
 146     it = stacking_list;
 147     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 148         if (layer[i]) {
 149             for (; it; it = g_list_next(it)) {
 150                 /* look for the top of the next layer down */
 151                 if (window_layer(it->data) < (ObStackingLayer) i)
 152                     break;
 153             }
 154             do_restack(layer[i], it);
 155             g_list_free(layer[i]);
 156         }
 157     }
 158 }
 159
 160 static GList *pick_windows(ObClient *top, ObClient *selected, gboolean raise)
 161 {
 162     GList *ret = NULL;
 163     GList *it, *next, *prev;
 164     GSList *sit;
 165     gint i, n;
 166     GList *modals = NULL;
 167     GList *trans = NULL;
 168     GList *modal_sel = NULL; /* the selected guys if modal */
 169     GList *trans_sel = NULL; /* the selected guys if not */
 170
 171     /* remove first so we can't run into ourself */
 172     if ((it = g_list_find(stacking_list, top)))
 173         stacking_list = g_list_delete_link(stacking_list, it);
 174     else
 175         return NULL;
 176
 177     i = 0;
 178     n = g_slist_length(top->transients);
 179     for (it = stacking_list; i < n && it; it = next) {
 180         prev = g_list_previous(it);
 181         next = g_list_next(it);
 182
 183         if ((sit = g_slist_find(top->transients, it->data))) {
 184             ObClient *c = sit->data;
 185             gboolean sel_child;
 186
 187             ++i;
 188
 189             if (c == selected)
 190                 sel_child = TRUE;
 191             else
 192                 sel_child = client_search_transient(c, selected) != NULL;
 193
 194             if (!c->modal) {
 195                 if (!sel_child) {
 196                     trans = g_list_concat(trans,
 197                                           pick_windows(c, selected, raise));
 198                 } else {
 199                     trans_sel = g_list_concat(trans_sel,
 200                                                  pick_windows(c, selected,
 201                                                               raise));
 202                 }
 203             } else {
 204                 if (!sel_child) {
 205                     modals = g_list_concat(modals,
 206                                            pick_windows(c, selected, raise));
 207                 } else {
 208                     modal_sel = g_list_concat(modal_sel,
 209                                                  pick_windows(c, selected,
 210                                                               raise));
 211                 }
 212             }
 213             /* if we dont have a prev then start back at the beginning,
 214                otherwise skip back to the prev's next */
 215             next = prev ? g_list_next(prev) : stacking_list;
 216         }
 217     }
 218
 219     ret = g_list_concat((raise ? modal_sel : modals),
 220                         (raise ? modals : modal_sel));
 221
 222     ret = g_list_concat(ret, (raise ? trans_sel : trans));
 223     ret = g_list_concat(ret, (raise ? trans : trans_sel));
 224
 225
 226     /* add itself */
 227     ret = g_list_append(ret, top);
 228
 229     return ret;
 230 }
 231
 232 static GList *pick_group_windows(ObClient *top, ObClient *selected,
 233                                  gboolean raise, gboolean normal)
 234 {
 235     GList *ret = NULL;
 236     GList *it, *next, *prev;
 237     GSList *sit;
 238     gint i, n;
 239
 240     /* add group members in their stacking order */
 241     if (top->group) {
 242         i = 0;
 243         n = g_slist_length(top->group->members) - 1;
 244         for (it = stacking_list; i < n && it; it = next) {
 245             prev = g_list_previous(it);
 246             next = g_list_next(it);
 247
 248             if ((sit = g_slist_find(top->group->members, it->data))) {
 249                 ObClient *c;
 250                 ObClientType t;
 251
 252                 ++i;
 253                 c = it->data;
 254                 t = c->type;
 255
 256                 if ((c->desktop == selected->desktop ||
 257                      c->desktop == DESKTOP_ALL) &&
 258                     (t == OB_CLIENT_TYPE_TOOLBAR ||
 259                      t == OB_CLIENT_TYPE_MENU ||
 260                      t == OB_CLIENT_TYPE_UTILITY ||
 261                      (normal && t == OB_CLIENT_TYPE_NORMAL)))
 262                 {
 263                     ret = g_list_concat(ret,
 264                                         pick_windows(sit->data,
 265                                                      selected, raise));
 266                     /* if we dont have a prev then start back at the beginning,
 267                        otherwise skip back to the prev's next */
 268                     next = prev ? g_list_next(prev) : stacking_list;
 269                 }
 270             }
 271         }
 272     }
 273     return ret;
 274 }
 275
 276 void stacking_raise(ObWindow *window, gboolean group)
 277 {
 278     GList *wins;
 279
 280     if (WINDOW_IS_CLIENT(window)) {
 281         ObClient *c;
 282         ObClient *selected;
 283         selected = WINDOW_AS_CLIENT(window);
 284         c = client_search_top_transient(selected);
 285         wins = pick_windows(c, selected, TRUE);
 286         wins = g_list_concat(wins, pick_group_windows(c, selected, TRUE, group));
 287     } else {
 288         wins = g_list_append(NULL, window);
 289         stacking_list = g_list_remove(stacking_list, window);
 290     }
 291     do_raise(wins);
 292     g_list_free(wins);
 293 }
 294
 295 void stacking_lower(ObWindow *window, gboolean group)
 296 {
 297     GList *wins;
 298
 299     if (WINDOW_IS_CLIENT(window)) {
 300         ObClient *c;
 301         ObClient *selected;
 302         selected = WINDOW_AS_CLIENT(window);
 303         c = client_search_top_transient(selected);
 304         wins = pick_windows(c, selected, FALSE);
 305         wins = g_list_concat(pick_group_windows(c, selected, FALSE, group), wins);
 306     } else {
 307         wins = g_list_append(NULL, window);
 308         stacking_list = g_list_remove(stacking_list, window);
 309     }
 310     do_lower(wins);
 311     g_list_free(wins);
 312 }
 313
 314 void stacking_below(ObWindow *window, ObWindow *below)
 315 {
 316     GList *wins, *before;
 317
 318     if (window_layer(window) != window_layer(below))
 319         return;
 320
 321     wins = g_list_append(NULL, window);
 322     stacking_list = g_list_remove(stacking_list, window);
 323     before = g_list_next(g_list_find(stacking_list, below));
 324     do_restack(wins, before);
 325     g_list_free(wins);
 326 }
 327
 328 void stacking_add(ObWindow *win)
 329 {
 330     ObStackingLayer l;
 331     GList *wins;
 332
 333     g_assert(screen_support_win != None); /* make sure I dont break this in the
 334                                              future */
 335
 336     l = window_layer(win);
 337     wins = g_list_append(NULL, win); /* list of 1 element */
 338
 339     stacking_list = g_list_append(stacking_list, win);
 340     stacking_raise(win, FALSE);
 341 }
 342
 343 void stacking_add_nonintrusive(ObWindow *win)
 344 {
 345     ObClient *client;
 346     ObClient *parent = NULL;
 347     GList *it_before = NULL;
 348
 349     if (!WINDOW_IS_CLIENT(win)) {
 350         stacking_add(win); /* no special rules for others */
 351         return;
 352     }
 353
 354     client = WINDOW_AS_CLIENT(win);
 355
 356     /* insert above its highest parent */
 357     if (client->transient_for) {
 358         if (client->transient_for != OB_TRAN_GROUP) {
 359             parent = client->transient_for;
 360         } else {
 361             GSList *sit;
 362             GList *it;
 363
 364             if (client->group)
 365                 for (it = stacking_list; !parent && it; it = g_list_next(it)) {
 366                     if ((sit = g_slist_find(client->group->members, it->data)))
 367                 for (sit = client->group->members; !parent && sit;
 368                      sit = g_slist_next(sit))
 369                 {
 370                     ObClient *c = sit->data;
 371                     /* checking transient_for prevents infinate loops! */
 372                     if (sit->data == it->data && !c->transient_for)
 373                         parent = it->data;
 374                 }
 375             }
 376         }
 377     }
 378
 379     if (!(it_before = g_list_find(stacking_list, parent))) {
 380         /* no parent to put above, try find the focused client to go
 381            under */
 382         if (focus_client && focus_client->layer == client->layer) {
 383             if ((it_before = g_list_find(stacking_list, focus_client)))
 384                 it_before = it_before->next;
 385         }
 386     }
 387     if (!it_before) {
 388         /* out of ideas, just add it normally... */
 389         stacking_add(win);
 390     } else {
 391         GList *wins = g_list_append(NULL, win);
 392         do_restack(wins, it_before);
 393         g_list_free(wins);
 394     }
 395 }