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         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 raise(GList *wins)
  83 {
  84     GList *it;
  85     GList *layer[NUM_STACKLAYER] = {NULL};
  86     int i;
  87
  88     for (it = wins; it; it = g_list_next(it)) {
  89         StackLayer 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 = NUM_STACKLAYER - 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) <= (StackLayer) i)
 101                     break;
 102             }
 103             do_restack(layer[i], it);
 104             g_list_free(layer[i]);
 105         }
 106     }
 107 }
 108
 109 static void lower(GList *wins)
 110 {
 111     GList *it;
 112     GList *layer[NUM_STACKLAYER] = {NULL};
 113     int i;
 114
 115     for (it = wins; it; it = g_list_next(it)) {
 116         StackLayer 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 = NUM_STACKLAYER - 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) < (StackLayer) 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(ObWindow *win)
 137 {
 138     GList *ret = NULL;
 139     GList *it, *next;
 140     GSList *sit;
 141     Client *c;
 142     int i, n;
 143
 144     if (!WINDOW_IS_CLIENT(win)) {
 145         ret = g_list_append(ret, win);
 146         stacking_list = g_list_remove(stacking_list, win);
 147         return ret;
 148     }
 149
 150     c = WINDOW_AS_CLIENT(win);
 151
 152     /* remove first so we can't run into ourself */
 153     stacking_list = g_list_remove(stacking_list, win);
 154
 155     /* add transient children in their stacking order */
 156     i = 0;
 157     n = g_slist_length(c->transients);
 158     for (it = stacking_list; i < n && it; it = next) {
 159         next = g_list_next(it);
 160         if ((sit = g_slist_find(c->transients, it->data))) {
 161             ++i;
 162             ret = g_list_concat(ret, pick_windows(sit->data));
 163             it = stacking_list;
 164         }
 165     }
 166
 167     /* add itself */
 168     ret = g_list_append(ret, win);
 169
 170     return ret;
 171 }
 172
 173 static GList *pick_group_windows(ObWindow *win)
 174 {
 175     GList *ret = NULL;
 176     GList *it, *next;
 177     GSList *sit;
 178     Client *c;
 179     int i, n;
 180
 181     if (!WINDOW_IS_CLIENT(win))
 182         return NULL;
 183
 184     c = WINDOW_AS_CLIENT(win);
 185
 186     /* add group members in their stacking order */
 187     if (c->group) {
 188         i = 0;
 189         n = g_slist_length(c->group->members) - 1;
 190         for (it = stacking_list; i < n && it; it = next) {
 191             next = g_list_next(it);
 192             if ((sit = g_slist_find(c->group->members, it->data))) {
 193                 ++i;
 194                 ret = g_list_concat(ret, pick_windows(sit->data));
 195                 it = stacking_list;
 196             }
 197         }
 198     }
 199     return ret;
 200 }
 201
 202 static ObWindow *top_transient(ObWindow *window)
 203 {
 204     Client *client;
 205
 206     if (!WINDOW_IS_CLIENT(window))
 207         return window;
 208
 209     client = WINDOW_AS_CLIENT(window);
 210
 211     /* move up the transient chain as far as possible */
 212     if (client->transient_for) {
 213         if (client->transient_for != TRAN_GROUP) {
 214             return top_transient(CLIENT_AS_WINDOW(client->transient_for));
 215         } else {
 216             GSList *it;
 217
 218             for (it = client->group->members; it; it = it->next) {
 219                 Client *c = it->data;
 220
 221                 /* checking transient_for prevents infinate loops! */
 222                 if (c != client && !c->transient_for)
 223                     break;
 224             }
 225             if (it)
 226                 return it->data;
 227         }
 228     }
 229
 230     return window;
 231 }
 232
 233 void stacking_raise(ObWindow *window)
 234 {
 235     GList *wins;
 236
 237     window = top_transient(window);
 238     wins = pick_windows(window);
 239     wins = g_list_concat(wins, pick_group_windows(window));
 240     raise(wins);
 241     g_list_free(wins);
 242 }
 243
 244 void stacking_lower(ObWindow *window)
 245 {
 246     GList *wins;
 247
 248     window = top_transient(window);
 249     wins = pick_windows(window);
 250     wins = g_list_concat(pick_group_windows(window), wins);
 251     lower(wins);
 252     g_list_free(wins);
 253 }
 254
 255 void stacking_add(ObWindow *win)
 256 {
 257     StackLayer l;
 258     GList *wins;
 259
 260     g_assert(focus_backup != None); /* make sure I dont break this in the
 261                                        future */
 262
 263     l = window_layer(win);
 264     wins = g_list_append(NULL, win); /* list of 1 element */
 265
 266     stacking_list = g_list_append(stacking_list, win);
 267     stacking_raise(win);
 268 }
 269
 270 void stacking_add_nonintrusive(ObWindow *win)
 271 {
 272     Client *client;
 273     Client *parent = NULL;
 274     GList *it_before = NULL;
 275
 276     if (!WINDOW_IS_CLIENT(win)) {
 277         stacking_add(win); /* no special rules for others */
 278         return;
 279     }
 280
 281     client = WINDOW_AS_CLIENT(win);
 282
 283     /* insert above its highest parent */
 284     if (client->transient_for) {
 285         if (client->transient_for != TRAN_GROUP) {
 286             parent = client->transient_for;
 287         } else {
 288             GSList *sit;
 289             GList *it;
 290
 291             if (client->group)
 292                 for (it = stacking_list; !parent && it; it = it->next) {
 293                     if ((sit = g_slist_find(client->group->members, it->data)))
 294                 for (sit = client->group->members; !parent && sit;
 295                      sit = sit->next) {
 296                     Client *c = sit->data;
 297                     /* checking transient_for prevents infinate loops! */
 298                     if (sit->data == it->data && !c->transient_for)
 299                         parent = it->data;
 300                 }
 301             }
 302         }
 303     }
 304
 305     if (!(it_before = g_list_find(stacking_list, parent))) {
 306         /* no parent to put above, try find the focused client to go
 307            under */
 308         if (focus_client && focus_client->layer == client->layer) {
 309             if ((it_before = g_list_find(stacking_list, focus_client)))
 310                 it_before = it_before->next;
 311         }
 312     }
 313     if (!it_before) {
 314         /* out of ideas, just add it normally... */
 315         stacking_add(win);
 316     } else {
 317         GList *wins = g_list_append(NULL, win);
 318         do_restack(wins, it_before);
 319         g_list_free(wins);
 320     }
 321 }