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

   1 #include "openbox.h"
   2 #include "prop.h"
   3 #include "screen.h"
   4 #include "focus.h"
   5 #include "client.h"
   6 #include "group.h"
   7 #include "frame.h"
   8 #include "window.h"
   9
  10 GList  *stacking_list = NULL;
  11
  12 void stacking_set_list()
  13 {
  14     Window *windows = NULL;
  15     GList *it;
  16     guint i = 0;
  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() == OB_STATE_EXITING) return;
  22
  23     /* create an array of the window ids (from bottom to top,
  24        reverse order!) */
  25     if (stacking_list) {
  26         windows = g_new(Window, g_list_length(stacking_list));
  27         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
  28             if (WINDOW_IS_CLIENT(it->data))
  29                 windows[i++] = WINDOW_AS_CLIENT(it->data)->window;
  30         }
  31     }
  32
  33     PROP_SETA32(RootWindow(ob_display, ob_screen),
  34                 net_client_list_stacking, window, (guint32*)windows, i);
  35
  36     g_free(windows);
  37 }
  38
  39 static void do_restack(GList *wins, GList *before)
  40 {
  41     GList *it, *next;
  42     Window *win;
  43     int i;
  44
  45     /* pls only restack stuff in the same layer at a time */
  46     for (it = wins; it; it = next) {
  47         next = g_list_next(it);
  48         if (!next) break;
  49         g_assert (window_layer(it->data) == window_layer(next->data));
  50     }
  51
  52
  53     win = g_new(Window, g_list_length(wins) + 1);
  54
  55     if (before == stacking_list)
  56         win[0] = screen_support_win;
  57     else if (!before)
  58         win[0] = window_top(g_list_last(stacking_list)->data);
  59     else
  60         win[0] = window_top(g_list_previous(before)->data);
  61
  62     for (i = 1, it = wins; it; ++i, it = g_list_next(it)) {
  63         win[i] = window_top(it->data);
  64         g_assert(win[i] != None); /* better not call stacking shit before
  65                                      setting your top level window value */
  66         stacking_list = g_list_insert_before(stacking_list, before, it->data);
  67     }
  68
  69     /* XXX some debug checking of the stacking list's order */
  70     for (it = stacking_list; ; it = next) {
  71         next = g_list_next(it);
  72         if (!next) break;
  73         g_assert(window_layer(it->data) >= window_layer(next->data));
  74     }
  75
  76     XRestackWindows(ob_display, win, i);
  77     g_free(win);
  78
  79     stacking_set_list();
  80 }
  81
  82 static void do_raise(GList *wins)
  83 {
  84     GList *it;
  85     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
  86     int i;
  87
  88     for (it = wins; it; it = g_list_next(it)) {
  89         ObStackingLayer l;
  90
  91         l = window_layer(it->data);
  92         layer[l] = g_list_append(layer[l], it->data);
  93     }
  94
  95     it = stacking_list;
  96     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
  97         if (layer[i]) {
  98             for (; it; it = g_list_next(it)) {
  99                 /* look for the top of the layer */
 100                 if (window_layer(it->data) <= (ObStackingLayer) i)
 101                     break;
 102             }
 103             do_restack(layer[i], it);
 104             g_list_free(layer[i]);
 105         }
 106     }
 107 }
 108
 109 static void do_lower(GList *wins)
 110 {
 111     GList *it;
 112     GList *layer[OB_NUM_STACKING_LAYERS] = {NULL};
 113     int i;
 114
 115     for (it = wins; it; it = g_list_next(it)) {
 116         ObStackingLayer l;
 117
 118         l = window_layer(it->data);
 119         layer[l] = g_list_append(layer[l], it->data);
 120     }
 121
 122     it = stacking_list;
 123     for (i = OB_NUM_STACKING_LAYERS - 1; i >= 0; --i) {
 124         if (layer[i]) {
 125             for (; it; it = g_list_next(it)) {
 126                 /* look for the top of the next layer down */
 127                 if (window_layer(it->data) < (ObStackingLayer) i)
 128                     break;
 129             }
 130             do_restack(layer[i], it);
 131             g_list_free(layer[i]);
 132         }
 133     }
 134 }
 135
 136 static GList *pick_windows(ObClient *top, ObClient *selected, gboolean raise)
 137 {
 138     GList *ret = NULL;
 139     GList *it, *next, *prev;
 140     GSList *sit;
 141     int i, n;
 142     GList *modals = NULL;
 143     GList *trans = NULL;
 144     GList *modal_sel_it = NULL; /* the selected guy if modal */
 145     GList *trans_sel_it = NULL; /* the selected guy if not */
 146
 147     /* remove first so we can't run into ourself */
 148     stacking_list = g_list_remove(stacking_list, top);
 149
 150     i = 0;
 151     n = g_slist_length(top->transients);
 152     for (it = stacking_list; i < n && it; it = next) {
 153         prev = g_list_previous(it);
 154         next = g_list_next(it);
 155
 156         if ((sit = g_slist_find(top->transients, it->data))) {
 157             ObClient *c = sit->data;
 158
 159             ++i;
 160
 161             if (!c->modal) {
 162                 if (c != selected) {
 163                     trans = g_list_concat(trans,
 164                                            pick_windows(c, selected, raise));
 165                 } else {
 166                     g_assert(modal_sel_it == NULL);
 167                     g_assert(trans_sel_it == NULL);
 168                     trans_sel_it = pick_windows(c, selected, raise);
 169                 }
 170             } else {
 171                 if (c != selected) {
 172                     modals = g_list_concat(modals,
 173                                            pick_windows(c, selected, raise));
 174                 } else {
 175                     g_assert(modal_sel_it == NULL);
 176                     g_assert(trans_sel_it == NULL);
 177                     modal_sel_it = pick_windows(c, selected, raise);
 178                 }
 179             }
 180             /* if we dont have a prev then start back at the beginning,
 181                otherwise skip back to the prev's next */
 182             next = prev ? g_list_next(prev) : stacking_list;
 183         }
 184     }
 185
 186     ret = g_list_concat((raise ? modal_sel_it : modals),
 187                         (raise ? modals : modal_sel_it));
 188
 189     ret = g_list_concat(ret, (raise ? trans_sel_it : trans));
 190     ret = g_list_concat(ret, (raise ? trans : trans_sel_it));
 191
 192
 193     /* add itself */
 194     ret = g_list_append(ret, top);
 195
 196     return ret;
 197 }
 198
 199 static GList *pick_group_windows(ObClient *top, ObClient *selected, gboolean raise)
 200 {
 201     GList *ret = NULL;
 202     GList *it, *next, *prev;
 203     GSList *sit;
 204     int i, n;
 205
 206     /* add group members in their stacking order */
 207     if (top->group) {
 208         i = 0;
 209         n = g_slist_length(top->group->members) - 1;
 210         for (it = stacking_list; i < n && it; it = next) {
 211             prev = g_list_previous(it);
 212             next = g_list_next(it);
 213
 214             if ((sit = g_slist_find(top->group->members, it->data))) {
 215                 ++i;
 216                 ret = g_list_concat(ret,
 217                                     pick_windows(sit->data, selected, raise));
 218                 /* if we dont have a prev then start back at the beginning,
 219                    otherwise skip back to the prev's next */
 220                 next = prev ? g_list_next(prev) : stacking_list;
 221             }
 222         }
 223     }
 224     return ret;
 225 }
 226
 227 void stacking_raise(ObWindow *window)
 228 {
 229     GList *wins;
 230
 231     if (WINDOW_IS_CLIENT(window)) {
 232         ObClient *c;
 233         ObClient *selected;
 234         selected = WINDOW_AS_CLIENT(window);
 235         c = client_search_top_transient(selected);
 236         wins = pick_windows(c, selected, TRUE);
 237         wins = g_list_concat(wins, pick_group_windows(c, selected, TRUE));
 238     } else {
 239         wins = g_list_append(NULL, window);
 240         stacking_list = g_list_remove(stacking_list, window);
 241     }
 242     do_raise(wins);
 243     g_list_free(wins);
 244 }
 245
 246 void stacking_lower(ObWindow *window)
 247 {
 248     GList *wins;
 249
 250     if (WINDOW_IS_CLIENT(window)) {
 251         ObClient *c;
 252         ObClient *selected;
 253         selected = WINDOW_AS_CLIENT(window);
 254         c = client_search_top_transient(selected);
 255         wins = pick_windows(c, selected, FALSE);
 256         wins = g_list_concat(pick_group_windows(c, selected, FALSE), wins);
 257     } else {
 258         wins = g_list_append(NULL, window);
 259         stacking_list = g_list_remove(stacking_list, window);
 260     }
 261     do_lower(wins);
 262     g_list_free(wins);
 263 }
 264
 265 void stacking_add(ObWindow *win)
 266 {
 267     ObStackingLayer l;
 268     GList *wins;
 269
 270     g_assert(screen_support_win != None); /* make sure I dont break this in the
 271                                        future */
 272
 273     l = window_layer(win);
 274     wins = g_list_append(NULL, win); /* list of 1 element */
 275
 276     stacking_list = g_list_append(stacking_list, win);
 277     stacking_raise(win);
 278 }
 279
 280 void stacking_add_nonintrusive(ObWindow *win)
 281 {
 282     ObClient *client;
 283     ObClient *parent = NULL;
 284     GList *it_before = NULL;
 285
 286     if (!WINDOW_IS_CLIENT(win)) {
 287         stacking_add(win); /* no special rules for others */
 288         return;
 289     }
 290
 291     client = WINDOW_AS_CLIENT(win);
 292
 293     /* insert above its highest parent */
 294     if (client->transient_for) {
 295         if (client->transient_for != OB_TRAN_GROUP) {
 296             parent = client->transient_for;
 297         } else {
 298             GSList *sit;
 299             GList *it;
 300
 301             if (client->group)
 302                 for (it = stacking_list; !parent && it; it = it->next) {
 303                     if ((sit = g_slist_find(client->group->members, it->data)))
 304                 for (sit = client->group->members; !parent && sit;
 305                      sit = sit->next) {
 306                     ObClient *c = sit->data;
 307                     /* checking transient_for prevents infinate loops! */
 308                     if (sit->data == it->data && !c->transient_for)
 309                         parent = it->data;
 310                 }
 311             }
 312         }
 313     }
 314
 315     if (!(it_before = g_list_find(stacking_list, parent))) {
 316         /* no parent to put above, try find the focused client to go
 317            under */
 318         if (focus_client && focus_client->layer == client->layer) {
 319             if ((it_before = g_list_find(stacking_list, focus_client)))
 320                 it_before = it_before->next;
 321         }
 322     }
 323     if (!it_before) {
 324         /* out of ideas, just add it normally... */
 325         stacking_add(win);
 326     } else {
 327         GList *wins = g_list_append(NULL, win);
 328         do_restack(wins, it_before);
 329         g_list_free(wins);
 330     }
 331 }