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, *win_it;
  15     GList *it;
  16     guint size = g_list_length(stacking_list);
  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 (size > 0) {
  26         windows = g_new(Window, size);
  27         win_it = windows;
  28         for (it = g_list_last(stacking_list); it != NULL;
  29              it = it->prev)
  30             if (WINDOW_IS_CLIENT(it->data)) {
  31                 *win_it = WINDOW_AS_CLIENT(it->data)->window;
  32                 ++win_it;
  33             }
  34     } else
  35         windows = win_it = NULL;
  36
  37     PROP_SETA32(ob_root, net_client_list_stacking, window,
  38                 (guint32*)windows, win_it - windows);
  39
  40     if (windows)
  41         g_free(windows);
  42 }
  43
  44 static GList *find_lowest_transient(Client *c)
  45 {
  46     GList *it;
  47     GSList *sit;
  48
  49     for (it = g_list_last(stacking_list); it; it = it->prev)
  50         for (sit = c->transients; sit; sit = sit->next)
  51             if (it->data == sit->data) /* found a transient */
  52                 return it;
  53     return NULL;
  54 }
  55
  56 static void raise_recursive(ObWindow *window)
  57 {
  58     Window wins[2];  /* only ever restack 2 windows. */
  59     GList *it, *low;
  60     GSList *sit;
  61
  62     g_assert(stacking_list != NULL); /* this would be bad */
  63
  64     /* remove the window before looking so we can't run into ourselves and our
  65        transients can't either. */
  66     stacking_list = g_list_remove(stacking_list, window);
  67
  68     /* raise transients first */
  69     if (WINDOW_IS_CLIENT(window)) {
  70         Client *client = WINDOW_AS_CLIENT(window);
  71         for (sit = client->transients; sit; sit = sit->next)
  72             raise_recursive(sit->data);
  73     }
  74
  75     /* find 'it' where it is the positiion in the stacking order where
  76        'window' will be inserted *before* */
  77
  78     if (WINDOW_IS_CLIENT(window))
  79         low = find_lowest_transient(WINDOW_AS_CLIENT(window));
  80     else
  81         low = NULL;
  82     /* the stacking list is from highest to lowest */
  83     for (it = g_list_last(stacking_list); it; it = it->prev) {
  84         if (it == low || window_layer(window) < window_layer(it->data)) {
  85             it = it->next;
  86             break;
  87         }
  88         if (it == stacking_list)
  89             break;
  90     }
  91
  92     /*
  93       if our new position is the top, we want to stack under the focus_backup.
  94       otherwise, we want to stack under the previous window in the stack.
  95     */
  96     if (it == stacking_list)
  97         wins[0] = focus_backup;
  98     else if (it != NULL)
  99         wins[0] = window_top(it->prev->data);
 100     else
 101         wins[0] = window_top(g_list_last(stacking_list)->data);
 102     wins[1] = window_top(window);
 103
 104     stacking_list = g_list_insert_before(stacking_list, it, window);
 105
 106     XRestackWindows(ob_display, wins, 2);
 107 }
 108
 109 void stacking_raise(ObWindow *window)
 110 {
 111     g_assert(stacking_list != NULL); /* this would be bad */
 112
 113     if (WINDOW_IS_CLIENT(window)) {
 114         Client *client = WINDOW_AS_CLIENT(window);
 115
 116         /* move up the transient chain as far as possible first */
 117         if (client->transient_for) {
 118             if (client->transient_for != TRAN_GROUP) {
 119                 stacking_raise(CLIENT_AS_WINDOW(client->transient_for));
 120                 return;
 121             } else {
 122                 GSList *it;
 123                 gboolean raised = FALSE;
 124
 125                 for (it = client->group->members; it; it = it->next) {
 126                     Client *c = it->data;
 127
 128                     /* checking transient_for prevents infinate loops! */
 129                     if (c != client && !c->transient_for) {
 130                         stacking_raise(it->data);
 131                         raised = TRUE;
 132                     }
 133                 }
 134                 if (raised) return;
 135             }
 136         }
 137     }
 138
 139     raise_recursive(window);
 140
 141     stacking_set_list();
 142 }
 143
 144 static void lower_recursive(ObWindow *window, ObWindow *above)
 145 {
 146     Window wins[2];  /* only ever restack 2 windows. */
 147     GList *it;
 148     GSList *sit;
 149
 150     /* find 'it' where 'it' is the position in the stacking_list where the
 151        'window' will be placed *after* */
 152
 153     for (it = g_list_last(stacking_list); it != stacking_list; it = it->prev)
 154         if (window_layer(window) <= window_layer(it->data) &&
 155             it->data != above)
 156             break;
 157
 158     if (it->data != window) { /* not already the bottom */
 159         wins[0] = window_top(it->data);
 160         wins[1] = window_top(window);
 161
 162         stacking_list = g_list_remove(stacking_list, window);
 163         stacking_list = g_list_insert_before(stacking_list, it->next, window);
 164         XRestackWindows(ob_display, wins, 2);
 165     }
 166
 167     if (WINDOW_IS_CLIENT(window)) {
 168         Client *client = WINDOW_AS_CLIENT(window);
 169         for (sit = client->transients; sit; sit = sit->next)
 170             lower_recursive(CLIENT_AS_WINDOW(sit->data), window);
 171     }
 172 }
 173
 174 void stacking_lower(ObWindow *window)
 175 {
 176     g_assert(stacking_list != NULL); /* this would be bad */
 177
 178     if (WINDOW_IS_CLIENT(window)) {
 179         Client *client = WINDOW_AS_CLIENT(window);
 180         /* move up the transient chain as far as possible first */
 181         while (client->transient_for) {
 182             if (client->transient_for != TRAN_GROUP) {
 183                 stacking_lower(CLIENT_AS_WINDOW(client->transient_for));
 184                 return;
 185             } else {
 186                 GSList *it;
 187
 188                 for (it = client->group->members; it; it = it->next) {
 189                     Client *c = it->data;
 190
 191                     /* checking transient_for prevents infinate loops! */
 192                     if (c != client && !c->transient_for)
 193                         stacking_lower(it->data);
 194                 }
 195                 if (it == NULL) return;
 196             }
 197         }
 198         window = CLIENT_AS_WINDOW(client);
 199     }
 200
 201     lower_recursive(window, NULL);
 202
 203     stacking_set_list();
 204 }
 205
 206 void stacking_add(ObWindow *win)
 207 {
 208     stacking_list = g_list_append(stacking_list, win);
 209     stacking_raise(win);
 210 }
 211
 212 void stacking_add_nonintrusive(ObWindow *win)
 213 {
 214     Window wins[2];  /* only ever restack 2 windows. */
 215
 216     if (!WINDOW_IS_CLIENT(win))
 217         stacking_add(win); /* no special rules for others */
 218     else {
 219         Client *client = WINDOW_AS_CLIENT(win);
 220         Client *parent = NULL;
 221         GList *it_before = NULL;
 222
 223         /* insert above its highest parent */
 224         if (client->transient_for) {
 225             if (client->transient_for != TRAN_GROUP) {
 226                 parent = client->transient_for;
 227             } else {
 228                 GSList *sit;
 229                 GList *it;
 230
 231                 for (it = stacking_list; !parent && it; it = it->next) {
 232                     for (sit = client->group->members; !parent && sit;
 233                          sit = sit->next) {
 234                         Client *c = sit->data;
 235                         /* checking transient_for prevents infinate loops! */
 236                         if (sit->data == it->data && !c->transient_for)
 237                             parent = it->data;
 238                     }
 239                 }
 240             }
 241         }
 242
 243         if (!(it_before = g_list_find(stacking_list, parent))) {
 244             /* no parent to put above, try find the focused client to go
 245                under */
 246             if ((it_before = g_list_find(stacking_list, focus_client)))
 247                 it_before = it_before->next;
 248             else {
 249                 /* out of ideas, just add it normally... */
 250                 stacking_add(win);
 251                 return;
 252             }
 253         }
 254         stacking_list = g_list_insert_before(stacking_list, it_before, win);
 255
 256         it_before = g_list_find(stacking_list, win)->prev;
 257         if (!it_before)
 258             wins[0] = focus_backup;
 259         else
 260             wins[0] = window_top(it_before->data);
 261         wins[1] = window_top(win);
 262
 263         XRestackWindows(ob_display, wins, 2);
 264     }
 265 }