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         /* move up the transient chain as far as possible first */
 116         while (client->transient_for) {
 117             if (client->transient_for != TRAN_GROUP) {
 118                 client = client->transient_for;
 119             } else {
 120                 GSList *it;
 121
 122                 /* the check for TRAN_GROUP is to prevent an infinate loop with
 123                    2 transients of the same group at the head of the group's
 124                    members list */
 125                 for (it = client->group->members; it; it = it->next) {
 126                     Client *c = it->data;
 127
 128                     if (c != client && c->transient_for != TRAN_GROUP) {
 129                         client = it->data;
 130                         break;
 131                     }
 132                 }
 133                 if (it == NULL) break;
 134             }
 135         }
 136         window = CLIENT_AS_WINDOW(client);
 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                 client = client->transient_for;
 184             } else {
 185                 GSList *it;
 186
 187                 /* the check for TRAN_GROUP is to prevent an infinate loop with
 188                    2 transients of the same group at the head of the group's
 189                    members list */
 190                 for (it = client->group->members; it; it = it->next) {
 191                     Client *c = it->data;
 192
 193                     if (c != client && c->transient_for != TRAN_GROUP) {
 194                         client = it->data;
 195                         break;
 196                     }
 197                 }
 198                 if (it == NULL) break;
 199             }
 200         }
 201         window = CLIENT_AS_WINDOW(client);
 202     }
 203
 204     lower_recursive(window, NULL);
 205
 206     stacking_set_list();
 207 }