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, (guint32*)windows, i);
  53
  54     g_free(windows);
  55 }
  56
  57 static void do_restack(GList *wins, GList *before)
  58 {
  59     GList *it, *next;
  60     Window *win;
  61     int i;
  62
  63 #ifdef DEBUG
  64     /* pls only restack stuff in the same layer at a time */
  65     for (it = wins; it; it = next) {
  66         next = g_list_next(it);
  67         if (!next) break;
  68         g_assert (window_layer(it->data) == window_layer(next->data));
  69     }
  70     if (before)
  71         g_assert(window_layer(it->data) >= window_layer(before->data));
  72 #endif
  73
  74     win = g_new(Window, g_list_length(wins) + 1);
  75
  76     if (before == stacking_list)
  77         win[0] = screen_support_win;
  78     else if (!before)
  79         win[0] = window_top(g_list_last(stacking_list)->data);
  80     else
  81         win[0] = window_top(g_list_previous(before)->data);
  82
  83     for (i = 1, it = wins; it; ++i, it = g_list_next(it)) {
  84         win[i] = window_top(it->data);
  85         g_assert(win[i] != None); /* better not call stacking shit before
  86                                      setting your top level window value */
  87         stacking_list = g_list_insert_before(stacking_list, before, it->data);
  88     }
  89
  90 #ifdef DEBUG
  91     /* some debug checking of the stacking list's order */
  92     for (it = stacking_list; ; it = next) {
  93         next = g_list_next(it);
  94         if (!next) break;
  95         g_assert(window_layer(it->data) >= window_layer(next->data));
  96     }
  97 #endif
  98
  99     XRestackWindows(ob_display, win, i);
 100     g_free(win);
 101
 102     stacking_set_list();
 103 }
 104
 105 static void do_raise(GList *wins)
 106 {
 107     GList *it;
 108     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 109     int i;
 110
 111     for (it = wins; it; it = g_list_next(it)) {
 112         ObStackingLayer l;
 113
 114         l = window_layer(it->data);
 115         layer[l] = g_list_append(layer[l], it->data);
 116     }
 117
 118     it = stacking_list;
 119     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 120         if (layer[i]) {
 121             for (; it; it = g_list_next(it)) {
 122                 /* look for the top of the layer */
 123                 if (window_layer(it->data) <= (ObStackingLayer) i)
 124                     break;
 125             }
 126             do_restack(layer[i], it);
 127             g_list_free(layer[i]);
 128         }
 129     }
 130 }
 131
 132 static void do_lower(GList *wins)
 133 {
 134     GList *it;
 135     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 136     int i;
 137
 138     for (it = wins; it; it = g_list_next(it)) {
 139         ObStackingLayer l;
 140
 141         l = window_layer(it->data);
 142         layer[l] = g_list_append(layer[l], it->data);
 143     }
 144
 145     it = stacking_list;
 146     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 147         if (layer[i]) {
 148             for (; it; it = g_list_next(it)) {
 149                 /* look for the top of the next layer down */
 150                 if (window_layer(it->data) < (ObStackingLayer) i)
 151                     break;
 152             }
 153             do_restack(layer[i], it);
 154             g_list_free(layer[i]);
 155         }
 156     }
 157 }
 158
 159 static GList *pick_windows(ObClient *top, ObClient *selected, gboolean raise)
 160 {
 161     GList *ret = NULL;
 162     GList *it, *next, *prev;
 163     GSList *sit;
 164     int i, n;
 165     GList *modals = NULL;
 166     GList *trans = NULL;
 167     GList *modal_sel = NULL; /* the selected guys if modal */
 168     GList *trans_sel = NULL; /* the selected guys if not */
 169
 170     /* remove first so we can't run into ourself */
 171     if ((it = g_list_find(stacking_list, top)))
 172         stacking_list = g_list_delete_link(stacking_list, it);
 173     else
 174         return NULL;
 175
 176     i = 0;
 177     n = g_slist_length(top->transients);
 178     for (it = stacking_list; i < n && it; it = next) {
 179         prev = g_list_previous(it);
 180         next = g_list_next(it);
 181
 182         if ((sit = g_slist_find(top->transients, it->data))) {
 183             ObClient *c = sit->data;
 184             gboolean sel_child;
 185
 186             ++i;
 187
 188             if (c == selected)
 189                 sel_child = TRUE;
 190             else
 191                 sel_child = client_search_transient(c, selected) != NULL;
 192
 193             if (!c->modal) {
 194                 if (!sel_child) {
 195                     trans = g_list_concat(trans,
 196                                           pick_windows(c, selected, raise));
 197                 } else {
 198                     trans_sel = g_list_concat(trans_sel,
 199                                                  pick_windows(c, selected,
 200                                                               raise));
 201                 }
 202             } else {
 203                 if (!sel_child) {
 204                     modals = g_list_concat(modals,
 205                                            pick_windows(c, selected, raise));
 206                 } else {
 207                     modal_sel = g_list_concat(modal_sel,
 208                                                  pick_windows(c, selected,
 209                                                               raise));
 210                 }
 211             }
 212             /* if we dont have a prev then start back at the beginning,
 213                otherwise skip back to the prev's next */
 214             next = prev ? g_list_next(prev) : stacking_list;
 215         }
 216     }
 217
 218     ret = g_list_concat((raise ? modal_sel : modals),
 219                         (raise ? modals : modal_sel));
 220
 221     ret = g_list_concat(ret, (raise ? trans_sel : trans));
 222     ret = g_list_concat(ret, (raise ? trans : trans_sel));
 223
 224
 225     /* add itself */
 226     ret = g_list_append(ret, top);
 227
 228     return ret;
 229 }
 230
 231 static GList *pick_group_windows(ObClient *top, ObClient *selected,
 232                                  gboolean raise)
 233 {
 234     GList *ret = NULL;
 235     GList *it, *next, *prev;
 236     GSList *sit;
 237     int i, n;
 238
 239     /* add group members in their stacking order */
 240     if (top->group) {
 241         i = 0;
 242         n = g_slist_length(top->group->members) - 1;
 243         for (it = stacking_list; i < n && it; it = next) {
 244             prev = g_list_previous(it);
 245             next = g_list_next(it);
 246
 247             if ((sit = g_slist_find(top->group->members, it->data))) {
 248                 ObClientType t;
 249
 250                 ++i;
 251
 252                 t = ((ObClient*)it->data)->type;
 253
 254                 if (t == OB_CLIENT_TYPE_TOOLBAR ||
 255                     t == OB_CLIENT_TYPE_MENU ||
 256                     t == OB_CLIENT_TYPE_UTILITY)
 257                 {
 258                     ret = g_list_concat(ret,
 259                                         pick_windows(sit->data,
 260                                                      selected, raise));
 261                     /* if we dont have a prev then start back at the beginning,
 262                        otherwise skip back to the prev's next */
 263                     next = prev ? g_list_next(prev) : stacking_list;
 264                 }
 265             }
 266         }
 267     }
 268     return ret;
 269 }
 270
 271 void stacking_raise(ObWindow *window)
 272 {
 273     GList *wins;
 274
 275     if (WINDOW_IS_CLIENT(window)) {
 276         ObClient *c;
 277         ObClient *selected;
 278         selected = WINDOW_AS_CLIENT(window);
 279         c = client_search_top_transient(selected);
 280         wins = pick_windows(c, selected, TRUE);
 281         wins = g_list_concat(wins, pick_group_windows(c, selected, TRUE));
 282     } else {
 283         wins = g_list_append(NULL, window);
 284         stacking_list = g_list_remove(stacking_list, window);
 285     }
 286     do_raise(wins);
 287     g_list_free(wins);
 288 }
 289
 290 void stacking_lower(ObWindow *window)
 291 {
 292     GList *wins;
 293
 294     if (WINDOW_IS_CLIENT(window)) {
 295         ObClient *c;
 296         ObClient *selected;
 297         selected = WINDOW_AS_CLIENT(window);
 298         c = client_search_top_transient(selected);
 299         wins = pick_windows(c, selected, FALSE);
 300         wins = g_list_concat(pick_group_windows(c, selected, FALSE), wins);
 301     } else {
 302         wins = g_list_append(NULL, window);
 303         stacking_list = g_list_remove(stacking_list, window);
 304     }
 305     do_lower(wins);
 306     g_list_free(wins);
 307 }
 308
 309 void stacking_below(ObWindow *window, ObWindow *below)
 310 {
 311     GList *wins, *before;
 312
 313     if (window_layer(window) != window_layer(below))
 314         return;
 315
 316     wins = g_list_append(NULL, window);
 317     stacking_list = g_list_remove(stacking_list, window);
 318     before = g_list_next(g_list_find(stacking_list, below));
 319     do_restack(wins, before);
 320     g_list_free(wins);
 321 }
 322
 323 void stacking_add(ObWindow *win)
 324 {
 325     ObStackingLayer l;
 326     GList *wins;
 327
 328     g_assert(screen_support_win != None); /* make sure I dont break this in the
 329                                        future */
 330
 331     l = window_layer(win);
 332     wins = g_list_append(NULL, win); /* list of 1 element */
 333
 334     stacking_list = g_list_append(stacking_list, win);
 335     stacking_raise(win);
 336 }
 337
 338 void stacking_add_nonintrusive(ObWindow *win)
 339 {
 340     ObClient *client;
 341     ObClient *parent = NULL;
 342     GList *it_before = NULL;
 343
 344     if (!WINDOW_IS_CLIENT(win)) {
 345         stacking_add(win); /* no special rules for others */
 346         return;
 347     }
 348
 349     client = WINDOW_AS_CLIENT(win);
 350
 351     /* insert above its highest parent */
 352     if (client->transient_for) {
 353         if (client->transient_for != OB_TRAN_GROUP) {
 354             parent = client->transient_for;
 355         } else {
 356             GSList *sit;
 357             GList *it;
 358
 359             if (client->group)
 360                 for (it = stacking_list; !parent && it; it = it->next) {
 361                     if ((sit = g_slist_find(client->group->members, it->data)))
 362                 for (sit = client->group->members; !parent && sit;
 363                      sit = sit->next) {
 364                     ObClient *c = sit->data;
 365                     /* checking transient_for prevents infinate loops! */
 366                     if (sit->data == it->data && !c->transient_for)
 367                         parent = it->data;
 368                 }
 369             }
 370         }
 371     }
 372
 373     if (!(it_before = g_list_find(stacking_list, parent))) {
 374         /* no parent to put above, try find the focused client to go
 375            under */
 376         if (focus_client && focus_client->layer == client->layer) {
 377             if ((it_before = g_list_find(stacking_list, focus_client)))
 378                 it_before = it_before->next;
 379         }
 380     }
 381     if (!it_before) {
 382         /* out of ideas, just add it normally... */
 383         stacking_add(win);
 384     } else {
 385         GList *wins = g_list_append(NULL, win);
 386         do_restack(wins, it_before);
 387         g_list_free(wins);
 388     }
 389 }