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 = 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 == 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(ob_root, net_client_list_stacking, window,
  34                 (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] = focus_backup;
  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         stacking_list = g_list_insert_before(stacking_list, before, it->data);
  65     }
  66
  67     /* XXX some debug checking of the stacking list's order */
  68     for (it = stacking_list; ; it = next) {
  69         next = g_list_next(it);
  70         if (!next) break;
  71         g_assert(window_layer(it->data) >= window_layer(next->data));
  72     }
  73
  74     XRestackWindows(ob_display, win, i);
  75     g_free(win);
  76
  77     stacking_set_list();
  78 }
  79
  80 static void raise(GList *wins)
  81 {
  82     GList *it;
  83     GList *layer[NUM_STACKLAYER] = {NULL};
  84     int i;
  85
  86     for (it = wins; it; it = g_list_next(it)) {
  87         StackLayer l;
  88
  89         l = window_layer(it->data);
  90         layer[l] = g_list_append(layer[l], it->data);
  91     }
  92
  93     it = stacking_list;
  94     for (i = NUM_STACKLAYER - 1; i >= 0; --i) {
  95         if (layer[i]) {
  96             for (; it; it = g_list_next(it)) {
  97                 /* look for the top of the layer */
  98                 if (window_layer(it->data) <= (StackLayer) i)
  99                     break;
 100             }
 101             do_restack(layer[i], it);
 102             g_list_free(layer[i]);
 103         }
 104     }
 105 }
 106
 107 static void lower(GList *wins)
 108 {
 109     GList *it;
 110     GList *layer[NUM_STACKLAYER] = {NULL};
 111     int i;
 112
 113     for (it = wins; it; it = g_list_next(it)) {
 114         StackLayer 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 = NUM_STACKLAYER - 1; i >= 0; --i) {
 122         if (layer[i]) {
 123             for (; it; it = g_list_next(it)) {
 124                 /* look for the top of the next layer down */
 125                 if (window_layer(it->data) < (StackLayer) i)
 126                     break;
 127             }
 128             do_restack(layer[i], it);
 129             g_list_free(layer[i]);
 130         }
 131     }
 132 }
 133
 134 static GList *pick_windows(ObWindow *win)
 135 {
 136     GList *ret = NULL;
 137     GList *it, *next;
 138     GSList *sit;
 139     Client *c;
 140     int i, n;
 141
 142     if (!WINDOW_IS_CLIENT(win)) {
 143         ret = g_list_append(ret, win);
 144         stacking_list = g_list_remove(stacking_list, win);
 145         return ret;
 146     }
 147
 148     c = WINDOW_AS_CLIENT(win);
 149
 150     /* remove first so we can't run into ourself */
 151     stacking_list = g_list_remove(stacking_list, win);
 152
 153     /* add transient children in their stacking order */
 154     i = 0;
 155     n = g_slist_length(c->transients);
 156     for (it = stacking_list; i < n && it; it = next) {
 157         next = g_list_next(it);
 158         if ((sit = g_slist_find(c->transients, it->data))) {
 159             ++i;
 160             ret = g_list_concat(ret, pick_windows(sit->data));
 161             it = stacking_list;
 162         }
 163     }
 164
 165     /* add itself */
 166     ret = g_list_append(ret, win);
 167
 168     return ret;
 169 }
 170
 171 static GList *pick_group_windows(ObWindow *win)
 172 {
 173     GList *ret = NULL;
 174     GList *it, *next;
 175     GSList *sit;
 176     Client *c;
 177     int i, n;
 178
 179     if (!WINDOW_IS_CLIENT(win))
 180         return NULL;
 181
 182     c = WINDOW_AS_CLIENT(win);
 183
 184     /* add group members in their stacking order */
 185     if (c->group) {
 186         i = 0;
 187         n = g_slist_length(c->group->members) - 1;
 188         for (it = stacking_list; i < n && it; it = next) {
 189             next = g_list_next(it);
 190             if ((sit = g_slist_find(c->group->members, it->data))) {
 191                 ++i;
 192                 ret = g_list_concat(ret, pick_windows(sit->data));
 193                 it = stacking_list;
 194             }
 195         }
 196     }
 197     return ret;
 198 }
 199
 200 static ObWindow *top_transient(ObWindow *window)
 201 {
 202     Client *client;
 203
 204     if (!WINDOW_IS_CLIENT(window))
 205         return window;
 206
 207     client = WINDOW_AS_CLIENT(window);
 208
 209     /* move up the transient chain as far as possible */
 210     if (client->transient_for) {
 211         if (client->transient_for != TRAN_GROUP) {
 212             return top_transient(CLIENT_AS_WINDOW(client->transient_for));
 213         } else {
 214             GSList *it;
 215
 216             for (it = client->group->members; it; it = it->next) {
 217                 Client *c = it->data;
 218
 219                 /* checking transient_for prevents infinate loops! */
 220                 if (c != client && !c->transient_for)
 221                     break;
 222             }
 223             if (it)
 224                 return it->data;
 225         }
 226     }
 227
 228     return window;
 229 }
 230
 231 void stacking_raise(ObWindow *window)
 232 {
 233     GList *wins;
 234
 235     window = top_transient(window);
 236     wins = pick_windows(window);
 237     wins = g_list_concat(wins, pick_group_windows(window));
 238     raise(wins);
 239     g_list_free(wins);
 240 }
 241
 242 void stacking_lower(ObWindow *window)
 243 {
 244     GList *wins;
 245
 246     window = top_transient(window);
 247     wins = pick_windows(window);
 248     wins = g_list_concat(pick_group_windows(window), wins);
 249     lower(wins);
 250     g_list_free(wins);
 251 }
 252
 253 void stacking_add(ObWindow *win)
 254 {
 255     StackLayer l;
 256     GList *wins, *it;
 257
 258     l = window_layer(win);
 259     wins = g_list_append(NULL, win); /* list of 1 element */
 260
 261     stacking_list = g_list_append(stacking_list, win);
 262     stacking_raise(win);
 263 }
 264
 265 void stacking_add_nonintrusive(ObWindow *win)
 266 {
 267     Client *client;
 268     Client *parent = NULL;
 269     GList *it_before = NULL;
 270
 271     if (!WINDOW_IS_CLIENT(win)) {
 272         stacking_add(win); /* no special rules for others */
 273         return;
 274     }
 275
 276     client = WINDOW_AS_CLIENT(win);
 277
 278     /* insert above its highest parent */
 279     if (client->transient_for) {
 280         if (client->transient_for != TRAN_GROUP) {
 281             parent = client->transient_for;
 282         } else {
 283             GSList *sit;
 284             GList *it;
 285
 286             if (client->group)
 287                 for (it = stacking_list; !parent && it; it = it->next) {
 288                     if ((sit = g_slist_find(client->group->members, it->data)))
 289                 for (sit = client->group->members; !parent && sit;
 290                      sit = sit->next) {
 291                     Client *c = sit->data;
 292                     /* checking transient_for prevents infinate loops! */
 293                     if (sit->data == it->data && !c->transient_for)
 294                         parent = it->data;
 295                 }
 296             }
 297         }
 298     }
 299
 300     if (!(it_before = g_list_find(stacking_list, parent))) {
 301         /* no parent to put above, try find the focused client to go
 302            under */
 303         if (focus_client && focus_client->layer == client->layer) {
 304             if ((it_before = g_list_find(stacking_list, focus_client)))
 305                 it_before = it_before->next;
 306         }
 307     }
 308     if (!it_before) {
 309         /* out of ideas, just add it normally... */
 310         stacking_add(win);
 311     } else {
 312         GList *wins = g_list_append(NULL, win);
 313         do_restack(wins, it_before);
 314         g_list_free(wins);
 315     }
 316 }