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) 2006        Mikael Magnusson
   5    Copyright (c) 2003        Ben Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "openbox.h"
  21 #include "prop.h"
  22 #include "screen.h"
  23 #include "focus.h"
  24 #include "client.h"
  25 #include "group.h"
  26 #include "frame.h"
  27 #include "window.h"
  28
  29 GList  *stacking_list = NULL;
  30
  31 void stacking_set_list()
  32 {
  33     Window *windows = NULL;
  34     GList *it;
  35     guint i = 0;
  36
  37     /* on shutdown, don't update the properties, so that we can read it back
  38        in on startup and re-stack the windows as they were before we shut down
  39     */
  40     if (ob_state() == OB_STATE_EXITING) return;
  41
  42     /* create an array of the window ids (from bottom to top,
  43        reverse order!) */
  44     if (stacking_list) {
  45         windows = g_new(Window, g_list_length(stacking_list));
  46         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
  47             if (WINDOW_IS_CLIENT(it->data))
  48                 windows[i++] = WINDOW_AS_CLIENT(it->data)->window;
  49         }
  50     }
  51
  52     PROP_SETA32(RootWindow(ob_display, ob_screen),
  53                 net_client_list_stacking, window, (gulong*)windows, i);
  54
  55     g_free(windows);
  56 }
  57
  58 static void do_restack(GList *wins, GList *before)
  59 {
  60     GList *it;
  61     Window *win;
  62     gint i;
  63
  64 #ifdef DEBUG
  65     GList *next;
  66     /* pls only restack stuff in the same layer at a time */
  67     for (it = wins; it; it = next) {
  68         next = g_list_next(it);
  69         if (!next) break;
  70         g_assert (window_layer(it->data) == window_layer(next->data));
  71     }
  72     if (before)
  73         g_assert(window_layer(it->data) >= window_layer(before->data));
  74 #endif
  75
  76     win = g_new(Window, g_list_length(wins) + 1);
  77
  78     if (before == stacking_list)
  79         win[0] = screen_support_win;
  80     else if (!before)
  81         win[0] = window_top(g_list_last(stacking_list)->data);
  82     else
  83         win[0] = window_top(g_list_previous(before)->data);
  84
  85     for (i = 1, it = wins; it; ++i, it = g_list_next(it)) {
  86         win[i] = window_top(it->data);
  87         g_assert(win[i] != None); /* better not call stacking shit before
  88                                      setting your top level window value */
  89         stacking_list = g_list_insert_before(stacking_list, before, it->data);
  90     }
  91
  92 #ifdef DEBUG
  93     /* some debug checking of the stacking list's order */
  94     for (it = stacking_list; ; it = next) {
  95         next = g_list_next(it);
  96         if (!next) break;
  97         g_assert(window_layer(it->data) >= window_layer(next->data));
  98     }
  99 #endif
 100
 101     XRestackWindows(ob_display, win, i);
 102     g_free(win);
 103
 104     stacking_set_list();
 105 }
 106
 107 static void do_raise(GList *wins)
 108 {
 109     GList *it;
 110     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 111     gint i;
 112
 113     for (it = wins; it; it = g_list_next(it)) {
 114         ObStackingLayer l;
 115
 116         l = window_layer(it->data);
 117         layer[l] = g_list_append(layer[l], it->data);
 118     }
 119
 120     it = stacking_list;
 121     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 122         if (layer[i]) {
 123             for (; it; it = g_list_next(it)) {
 124                 /* look for the top of the layer */
 125                 if (window_layer(it->data) <= (ObStackingLayer) i)
 126                     break;
 127             }
 128             do_restack(layer[i], it);
 129             g_list_free(layer[i]);
 130         }
 131     }
 132 }
 133
 134 static void do_lower(GList *wins)
 135 {
 136     GList *it;
 137     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 138     gint i;
 139
 140     for (it = wins; it; it = g_list_next(it)) {
 141         ObStackingLayer l;
 142
 143         l = window_layer(it->data);
 144         layer[l] = g_list_append(layer[l], it->data);
 145     }
 146
 147     it = stacking_list;
 148     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 149         if (layer[i]) {
 150             for (; it; it = g_list_next(it)) {
 151                 /* look for the top of the next layer down */
 152                 if (window_layer(it->data) < (ObStackingLayer) i)
 153                     break;
 154             }
 155             do_restack(layer[i], it);
 156             g_list_free(layer[i]);
 157         }
 158     }
 159 }
 160
 161 static GList *pick_windows(ObClient *top, ObClient *selected, gboolean raise)
 162 {
 163     GList *ret = NULL;
 164     GList *it, *next, *prev;
 165     GSList *sit;
 166     gint i, n;
 167     GList *modals = NULL;
 168     GList *trans = NULL;
 169     GList *modal_sel = NULL; /* the selected guys if modal */
 170     GList *trans_sel = NULL; /* the selected guys if not */
 171
 172     /* remove first so we can't run into ourself */
 173     if ((it = g_list_find(stacking_list, top)))
 174         stacking_list = g_list_delete_link(stacking_list, it);
 175     else
 176         return NULL;
 177
 178     i = 0;
 179     n = g_slist_length(top->transients);
 180     for (it = stacking_list; i < n && it; it = next) {
 181         prev = g_list_previous(it);
 182         next = g_list_next(it);
 183
 184         if ((sit = g_slist_find(top->transients, it->data))) {
 185             ObClient *c = sit->data;
 186             gboolean sel_child;
 187
 188             ++i;
 189
 190             if (c == selected)
 191                 sel_child = TRUE;
 192             else
 193                 sel_child = client_search_transient(c, selected) != NULL;
 194
 195             if (!c->modal) {
 196                 if (!sel_child) {
 197                     trans = g_list_concat(trans,
 198                                           pick_windows(c, selected, raise));
 199                 } else {
 200                     trans_sel = g_list_concat(trans_sel,
 201                                                  pick_windows(c, selected,
 202                                                               raise));
 203                 }
 204             } else {
 205                 if (!sel_child) {
 206                     modals = g_list_concat(modals,
 207                                            pick_windows(c, selected, raise));
 208                 } else {
 209                     modal_sel = g_list_concat(modal_sel,
 210                                                  pick_windows(c, selected,
 211                                                               raise));
 212                 }
 213             }
 214             /* if we dont have a prev then start back at the beginning,
 215                otherwise skip back to the prev's next */
 216             next = prev ? g_list_next(prev) : stacking_list;
 217         }
 218     }
 219
 220     ret = g_list_concat((raise ? modal_sel : modals),
 221                         (raise ? modals : modal_sel));
 222
 223     ret = g_list_concat(ret, (raise ? trans_sel : trans));
 224     ret = g_list_concat(ret, (raise ? trans : trans_sel));
 225
 226
 227     /* add itself */
 228     ret = g_list_append(ret, top);
 229
 230     return ret;
 231 }
 232
 233 static GList *pick_group_windows(ObClient *top, ObClient *selected,
 234                                  gboolean raise, gboolean normal)
 235 {
 236     GList *ret = NULL;
 237     GList *it, *next, *prev;
 238     GSList *sit;
 239     gint i, n;
 240
 241     /* add group members in their stacking order */
 242     if (top->group) {
 243         i = 0;
 244         n = g_slist_length(top->group->members) - 1;
 245         for (it = stacking_list; i < n && it; it = next) {
 246             prev = g_list_previous(it);
 247             next = g_list_next(it);
 248
 249             if ((sit = g_slist_find(top->group->members, it->data))) {
 250                 ObClient *c;
 251                 ObClientType t;
 252
 253                 ++i;
 254                 c = it->data;
 255                 t = c->type;
 256
 257                 if ((c->desktop == selected->desktop ||
 258                      c->desktop == DESKTOP_ALL) &&
 259                     (t == OB_CLIENT_TYPE_TOOLBAR ||
 260                      t == OB_CLIENT_TYPE_MENU ||
 261                      t == OB_CLIENT_TYPE_UTILITY ||
 262                      (normal && t == OB_CLIENT_TYPE_NORMAL)))
 263                 {
 264                     ret = g_list_concat(ret,
 265                                         pick_windows(sit->data,
 266                                                      selected, raise));
 267                     /* if we dont have a prev then start back at the beginning,
 268                        otherwise skip back to the prev's next */
 269                     next = prev ? g_list_next(prev) : stacking_list;
 270                 }
 271             }
 272         }
 273     }
 274     return ret;
 275 }
 276
 277 void stacking_raise(ObWindow *window, gboolean group)
 278 {
 279     GList *wins;
 280
 281     if (WINDOW_IS_CLIENT(window)) {
 282         ObClient *c;
 283         ObClient *selected;
 284         selected = WINDOW_AS_CLIENT(window);
 285         c = client_search_top_transient(selected);
 286         wins = pick_windows(c, selected, TRUE);
 287         wins = g_list_concat(wins,
 288                              pick_group_windows(c, selected, TRUE, group));
 289     } else {
 290         wins = g_list_append(NULL, window);
 291         stacking_list = g_list_remove(stacking_list, window);
 292     }
 293     do_raise(wins);
 294     g_list_free(wins);
 295 }
 296
 297 void stacking_lower(ObWindow *window, gboolean group)
 298 {
 299     GList *wins;
 300
 301     if (WINDOW_IS_CLIENT(window)) {
 302         ObClient *c;
 303         ObClient *selected;
 304         selected = WINDOW_AS_CLIENT(window);
 305         c = client_search_top_transient(selected);
 306         wins = pick_windows(c, selected, FALSE);
 307         wins = g_list_concat(pick_group_windows(c, selected, FALSE, group),
 308                              wins);
 309     } else {
 310         wins = g_list_append(NULL, window);
 311         stacking_list = g_list_remove(stacking_list, window);
 312     }
 313     do_lower(wins);
 314     g_list_free(wins);
 315 }
 316
 317 void stacking_below(ObWindow *window, ObWindow *below)
 318 {
 319     GList *wins, *before;
 320
 321     if (window_layer(window) != window_layer(below))
 322         return;
 323
 324     wins = g_list_append(NULL, window);
 325     stacking_list = g_list_remove(stacking_list, window);
 326     before = g_list_next(g_list_find(stacking_list, below));
 327     do_restack(wins, before);
 328     g_list_free(wins);
 329 }
 330
 331 void stacking_add(ObWindow *win)
 332 {
 333     g_assert(screen_support_win != None); /* make sure I dont break this in the
 334                                              future */
 335
 336     stacking_list = g_list_append(stacking_list, win);
 337     stacking_raise(win, FALSE);
 338 }
 339
 340 void stacking_add_nonintrusive(ObWindow *win)
 341 {
 342     ObClient *client;
 343     ObClient *parent = NULL;
 344     GList *it_before = NULL;
 345
 346     if (!WINDOW_IS_CLIENT(win)) {
 347         stacking_add(win); /* no special rules for others */
 348         return;
 349     }
 350
 351     client = WINDOW_AS_CLIENT(win);
 352
 353     /* insert above its highest parent */
 354     if (client->transient_for) {
 355         if (client->transient_for != OB_TRAN_GROUP) {
 356             parent = client->transient_for;
 357         } else {
 358             GSList *sit;
 359             GList *it;
 360
 361             if (client->group)
 362                 for (it = stacking_list; !parent && it; it = g_list_next(it)) {
 363                     if ((sit = g_slist_find(client->group->members, it->data)))
 364                 for (sit = client->group->members; !parent && sit;
 365                      sit = g_slist_next(sit))
 366                 {
 367                     ObClient *c = sit->data;
 368                     /* checking transient_for prevents infinate loops! */
 369                     if (sit->data == it->data && !c->transient_for)
 370                         parent = it->data;
 371                 }
 372             }
 373         }
 374     }
 375
 376     if (!(it_before = g_list_find(stacking_list, parent))) {
 377         /* no parent to put above, try find the focused client to go
 378            under */
 379         if (focus_client && focus_client->layer == client->layer) {
 380             if ((it_before = g_list_find(stacking_list, focus_client)))
 381                 it_before = it_before->next;
 382         }
 383     }
 384     if (!it_before) {
 385         /* out of ideas, just add it normally... */
 386         stacking_add(win);
 387     } else {
 388         GList *wins = g_list_append(NULL, win);
 389         do_restack(wins, it_before);
 390         g_list_free(wins);
 391     }
 392 }