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

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    place.c for the Openbox window manager
   4    Copyright (c) 2003        Ben Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "client.h"
  20 #include "group.h"
  21 #include "screen.h"
  22 #include "frame.h"
  23 #include "focus.h"
  24 #include "config.h"
  25
  26 static Rect* pick_head(ObClient *c)
  27 {
  28     /* try direct parent first */
  29     if (c->transient_for && c->transient_for != OB_TRAN_GROUP) {
  30         return screen_area_monitor(c->desktop,
  31                                    client_monitor(c->transient_for));
  32     }
  33
  34     /* more than one guy in his group (more than just him) */
  35     if (client_has_group_siblings(c)) {
  36         GSList *it;
  37
  38         /* try on the client's desktop */
  39         for (it = c->group->members; it; it = g_slist_next(it)) {
  40             ObClient *itc = it->data;
  41             if (itc != c &&
  42                 (itc->desktop == c->desktop ||
  43                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  44                 return screen_area_monitor(c->desktop,
  45                                            client_monitor(it->data));
  46         }
  47
  48         /* try on all desktops */
  49         for (it = c->group->members; it; it = g_slist_next(it)) {
  50             ObClient *itc = it->data;
  51             if (itc != c)
  52                 return screen_area_monitor(c->desktop,
  53                                            client_monitor(it->data));
  54         }
  55     }
  56
  57     return NULL;
  58 }
  59
  60 static gboolean place_random(ObClient *client, gint *x, gint *y)
  61 {
  62     int l, r, t, b;
  63     Rect *area;
  64
  65     area = pick_head(client);
  66     if (!area)
  67         area = screen_area_monitor(client->desktop,
  68                                    g_random_int_range(0, screen_num_monitors));
  69
  70     l = area->x;
  71     t = area->y;
  72     r = area->x + area->width - client->frame->area.width;
  73     b = area->y + area->height - client->frame->area.height;
  74
  75     if (r > l) *x = g_random_int_range(l, r + 1);
  76     else       *x = 0;
  77     if (b > t) *y = g_random_int_range(t, b + 1);
  78     else       *y = 0;
  79
  80     return TRUE;
  81 }
  82
  83 static GSList* area_add(GSList *list, Rect *a)
  84 {
  85     Rect *r = g_new(Rect, 1);
  86     *r = *a;
  87     return g_slist_prepend(list, r);
  88 }
  89
  90 static GSList* area_remove(GSList *list, Rect *a)
  91 {
  92     GSList *sit;
  93     GSList *result = NULL;
  94
  95     for (sit = list; sit; sit = g_slist_next(sit)) {
  96         Rect *r = sit->data;
  97
  98         if (!RECT_INTERSECTS_RECT(*r, *a)) {
  99             result = g_slist_prepend(result, r);
 100             r = NULL; /* dont free it */
 101         } else {
 102             Rect isect, extra;
 103
 104             /* Use an intersection of a and r to determine the space
 105                around r that we can use.
 106
 107                NOTE: the spaces calculated can overlap.
 108             */
 109
 110             RECT_SET_INTERSECTION(isect, *r, *a);
 111
 112             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 113                 RECT_SET(extra, r->x, r->y,
 114                          RECT_LEFT(isect) - r->x, r->height);
 115                 result = area_add(result, &extra);
 116             }
 117
 118             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 119                 RECT_SET(extra, r->x, r->y,
 120                          r->width, RECT_TOP(isect) - r->y + 1);
 121                 result = area_add(result, &extra);
 122             }
 123
 124             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 125                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 126                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 127                 result = area_add(result, &extra);
 128             }
 129
 130             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 131                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 132                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 133                 result = area_add(result, &extra);
 134             }
 135         }
 136
 137         g_free(r);
 138     }
 139     g_slist_free(list);
 140     return result;
 141 }
 142
 143 static gint area_cmp(gconstpointer p1, gconstpointer p2, gpointer data)
 144 {
 145     ObClient *c = data;
 146     Rect *carea = &c->frame->area;
 147     const Rect *a1 = p1, *a2 = p2;
 148     gboolean diffhead = FALSE;
 149     guint i;
 150     Rect *a;
 151
 152     for (i = 0; i < screen_num_monitors; ++i) {
 153         a = screen_physical_area_monitor(i);
 154         if (RECT_CONTAINS(*a, a1->x, a1->y) &&
 155             !RECT_CONTAINS(*a, a2->x, a2->y))
 156         {
 157             diffhead = TRUE;
 158             break;
 159         }
 160     }
 161
 162     /* has to be more than me in the group */
 163     if (diffhead && client_has_group_siblings(c)) {
 164         guint *num, most;
 165         GSList *it;
 166
 167         /* find how many clients in the group are on each monitor, use the
 168            monitor with the most in it */
 169         num = g_new0(guint, screen_num_monitors);
 170         for (it = c->group->members; it; it = g_slist_next(it))
 171             if (it->data != c)
 172                 ++num[client_monitor(it->data)];
 173         most = 0;
 174         for (i = 1; i < screen_num_monitors; ++i)
 175             if (num[i] > num[most])
 176                 most = i;
 177
 178         a = screen_physical_area_monitor(most);
 179         if (RECT_CONTAINS(*a, a1->x, a1->y))
 180             return -1;
 181         if (RECT_CONTAINS(*a, a2->x, a2->y))
 182             return 1;
 183     }
 184
 185     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 186         MIN((a2->width - carea->width), (a2->height - carea->height));
 187 }
 188
 189 typedef enum
 190 {
 191     SMART_FULL,
 192     SMART_GROUP,
 193     SMART_FOCUSED
 194 } ObSmartType;
 195
 196 #define SMART_IGNORE(placer, c) \
 197     (placer == c || !c->frame->visible || c->shaded || !client_normal(c) || \
 198      (c->desktop != DESKTOP_ALL && \
 199       c->desktop != (placer->desktop == DESKTOP_ALL ? \
 200                      screen_desktop : placer->desktop)))
 201
 202 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 203                             ObSmartType type)
 204 {
 205     guint i;
 206     gboolean ret = FALSE;
 207     GSList *spaces = NULL, *sit;
 208     GList *it;
 209
 210     for (i = 0; i < screen_num_monitors; ++i)
 211         spaces = area_add(spaces, screen_area_monitor(client->desktop, i));
 212
 213     /* stay out from under windows in higher layers */
 214     for (it = stacking_list; it; it = g_list_next(it)) {
 215         ObClient *c;
 216
 217         if (WINDOW_IS_CLIENT(it->data)) {
 218             c = it->data;
 219             if (c->fullscreen)
 220                 continue;
 221         } else
 222             continue;
 223
 224         if (c->layer > client->layer) {
 225             if (!SMART_IGNORE(client, c))
 226                 spaces = area_remove(spaces, &c->frame->area);
 227         } else
 228             break;
 229     }
 230
 231     if (client->type == OB_CLIENT_TYPE_NORMAL) {
 232         if (type == SMART_FULL || type == SMART_FOCUSED) {
 233             gboolean found_foc = FALSE, stop = FALSE;
 234             ObClient *foc;
 235             GList *list;
 236
 237             list = focus_order[client->desktop == DESKTOP_ALL ?
 238                                screen_desktop : client->desktop];
 239             foc = list ? list->data : NULL;
 240
 241             for (; it && !stop; it = g_list_next(it)) {
 242                 ObClient *c;
 243
 244                 if (WINDOW_IS_CLIENT(it->data)) {
 245                     c = it->data;
 246                     if (c->fullscreen)
 247                         continue;
 248                 } else
 249                     continue;
 250
 251                 if (!SMART_IGNORE(client, c)) {
 252                     if (type == SMART_FOCUSED)
 253                         if (found_foc)
 254                             stop = TRUE;
 255                     if (!stop)
 256                         spaces = area_remove(spaces, &c->frame->area);
 257                 }
 258
 259                 if (c == foc)
 260                     found_foc = TRUE;
 261             }
 262         } else if (type == SMART_GROUP) {
 263             /* has to be more than me in the group */
 264             if (!client_has_group_siblings(client))
 265                 return FALSE;
 266
 267             for (sit = client->group->members; sit; sit = g_slist_next(sit)) {
 268                 ObClient *c = sit->data;
 269                 if (!SMART_IGNORE(client, c))
 270                     spaces = area_remove(spaces, &c->frame->area);
 271             }
 272         } else
 273             g_assert_not_reached();
 274     }
 275
 276     spaces = g_slist_sort_with_data(spaces, area_cmp, client);
 277
 278     for (sit = spaces; sit; sit = g_slist_next(sit)) {
 279         Rect *r = sit->data;
 280
 281         if (!ret) {
 282             if (r->width >= client->frame->area.width &&
 283                 r->height >= client->frame->area.height) {
 284                 ret = TRUE;
 285                 if (client->type == OB_CLIENT_TYPE_DIALOG ||
 286                     type != SMART_FULL)
 287                 {
 288                     *x = r->x + (r->width - client->frame->area.width) / 2;
 289                     *y = r->y + (r->height - client->frame->area.height) / 2;
 290                 } else {
 291                     *x = r->x;
 292                     *y = r->y;
 293                 }
 294             }
 295         }
 296
 297         g_free(r);
 298     }
 299     g_slist_free(spaces);
 300
 301     return ret;
 302 }
 303
 304 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 305 {
 306     guint i;
 307     gint l, r, t, b;
 308     gint px, py;
 309     Rect *area;
 310
 311     screen_pointer_pos(&px, &py);
 312
 313     for (i = 0; i < screen_num_monitors; ++i) {
 314         area = screen_area_monitor(client->desktop, i);
 315         if (RECT_CONTAINS(*area, px, py))
 316             break;
 317     }
 318     if (i == screen_num_monitors)
 319         area = screen_area_monitor(client->desktop, 0);
 320
 321     l = area->x;
 322     t = area->y;
 323     r = area->x + area->width - client->frame->area.width;
 324     b = area->y + area->height - client->frame->area.height;
 325
 326     *x = px - client->area.width / 2 - client->frame->size.left;
 327     *x = MIN(MAX(*x, l), r);
 328     *y = py - client->area.height / 2 - client->frame->size.top;
 329     *y = MIN(MAX(*y, t), b);
 330
 331     return TRUE;
 332 }
 333
 334 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 335 {
 336     if (client->transient_for) {
 337         if (client->transient_for != OB_TRAN_GROUP) {
 338             ObClient *c = client;
 339             ObClient *p = client->transient_for;
 340             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 341                 p->frame->area.x;
 342             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 343                 p->frame->area.y;
 344             return TRUE;
 345         } else {
 346             GSList *it;
 347             gboolean first = TRUE;
 348             int l, r, t, b;
 349             for (it = client->group->members; it; it = it->next) {
 350                 ObClient *m = it->data;
 351                 if (!(m == client || m->transient_for)) {
 352                     if (first) {
 353                         l = RECT_LEFT(m->frame->area);
 354                         t = RECT_TOP(m->frame->area);
 355                         r = RECT_RIGHT(m->frame->area);
 356                         b = RECT_BOTTOM(m->frame->area);
 357                         first = FALSE;
 358                     } else {
 359                         l = MIN(l, RECT_LEFT(m->frame->area));
 360                         t = MIN(t, RECT_TOP(m->frame->area));
 361                         r = MAX(r, RECT_RIGHT(m->frame->area));
 362                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 363                     }
 364                 }
 365             }
 366             if (!first) {
 367                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 368                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 369                 return TRUE;
 370             }
 371         }
 372     }
 373     return FALSE;
 374 }
 375
 376 void place_client(ObClient *client, gint *x, gint *y)
 377 {
 378     if (client->positioned)
 379         return;
 380     if (place_transient(client, x, y)             ||
 381         ((config_place_policy == OB_PLACE_POLICY_MOUSE) ?
 382          place_under_mouse(client, x, y) :
 383          place_smart(client, x, y, SMART_FULL)    ||
 384          place_smart(client, x, y, SMART_GROUP)   ||
 385          place_smart(client, x, y, SMART_FOCUSED) ||
 386          place_random(client, x, y)))
 387     {
 388         /* get where the client should be */
 389         frame_frame_gravity(client->frame, x, y);
 390     } else
 391         g_assert_not_reached(); /* the last one better succeed */
 392 }