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) 2006        Mikael Magnusson
   5    Copyright (c) 2003        Ben Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "client.h"
  21 #include "group.h"
  22 #include "screen.h"
  23 #include "frame.h"
  24 #include "focus.h"
  25 #include "config.h"
  26
  27 static void add_choice(guint *choice, guint mychoice)
  28 {
  29     guint i;
  30     for (i = 0; i < screen_num_monitors; ++i) {
  31         if (choice[i] == mychoice)
  32             return;
  33         else if (choice[i] == screen_num_monitors) {
  34             choice[i] = mychoice;
  35             return;
  36         }
  37     }
  38 }
  39
  40 static Rect *pick_pointer_head(ObClient *c)
  41 {
  42     guint i;
  43     gint px, py;
  44
  45     screen_pointer_pos(&px, &py);
  46
  47     for (i = 0; i < screen_num_monitors; ++i) {
  48         if (RECT_CONTAINS(*screen_physical_area_monitor(i), px, py)) {
  49             return screen_area_monitor(c->desktop, i);
  50         }
  51     }
  52     g_assert_not_reached();
  53 }
  54
  55 static Rect **pick_head(ObClient *c)
  56 {
  57     Rect **area;
  58     guint *choice;
  59     guint i;
  60     gint px, py;
  61
  62     area = g_new(Rect*, screen_num_monitors);
  63     choice = g_new(guint, screen_num_monitors);
  64     for (i = 0; i < screen_num_monitors; ++i)
  65         choice[i] = screen_num_monitors; /* make them all invalid to start */
  66
  67     /* try direct parent first */
  68     if (c->transient_for && c->transient_for != OB_TRAN_GROUP) {
  69         add_choice(choice, client_monitor(c->transient_for));
  70     }
  71
  72     /* more than one window in its group (more than just this window) */
  73     if (client_has_group_siblings(c)) {
  74         GSList *it;
  75
  76         /* try on the client's desktop */
  77         for (it = c->group->members; it; it = g_slist_next(it)) {
  78             ObClient *itc = it->data;
  79             if (itc != c &&
  80                 (itc->desktop == c->desktop ||
  81                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  82                 add_choice(choice, client_monitor(it->data));
  83         }
  84
  85         /* try on all desktops */
  86         for (it = c->group->members; it; it = g_slist_next(it)) {
  87             ObClient *itc = it->data;
  88             if (itc != c)
  89                 add_choice(choice, client_monitor(it->data));
  90         }
  91     }
  92
  93     if (focus_client)
  94         add_choice(choice, client_monitor(focus_client));
  95
  96     screen_pointer_pos(&px, &py);
  97
  98     for (i = 0; i < screen_num_monitors; i++)
  99         if (RECT_CONTAINS(*screen_physical_area_monitor(i), px, py)) {
 100             add_choice(choice, i);
 101             break;
 102         }
 103
 104     /* add any leftover choices */
 105     for (i = 0; i < screen_num_monitors; ++i)
 106         add_choice(choice, i);
 107
 108     for (i = 0; i < screen_num_monitors; ++i)
 109         area[i] = screen_area_monitor(c->desktop, choice[i]);
 110
 111     return area;
 112 }
 113
 114 static gboolean place_random(ObClient *client, gint *x, gint *y)
 115 {
 116     gint l, r, t, b;
 117     Rect **areas;
 118     guint i;
 119
 120     areas = pick_head(client);
 121     i = g_random_int_range(0, screen_num_monitors);
 122
 123     l = areas[i]->x;
 124     t = areas[i]->y;
 125     r = areas[i]->x + areas[i]->width - client->frame->area.width;
 126     b = areas[i]->y + areas[i]->height - client->frame->area.height;
 127
 128     if (r > l) *x = g_random_int_range(l, r + 1);
 129     else       *x = 0;
 130     if (b > t) *y = g_random_int_range(t, b + 1);
 131     else       *y = 0;
 132
 133     g_free(areas);
 134
 135     return TRUE;
 136 }
 137
 138 static GSList* area_add(GSList *list, Rect *a)
 139 {
 140     Rect *r = g_new(Rect, 1);
 141     *r = *a;
 142     return g_slist_prepend(list, r);
 143 }
 144
 145 static GSList* area_remove(GSList *list, Rect *a)
 146 {
 147     GSList *sit;
 148     GSList *result = NULL;
 149
 150     for (sit = list; sit; sit = g_slist_next(sit)) {
 151         Rect *r = sit->data;
 152
 153         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 154             result = g_slist_prepend(result, r);
 155             r = NULL; /* dont free it */
 156         } else {
 157             Rect isect, extra;
 158
 159             /* Use an intersection of a and r to determine the space
 160                around r that we can use.
 161
 162                NOTE: the spaces calculated can overlap.
 163             */
 164
 165             RECT_SET_INTERSECTION(isect, *r, *a);
 166
 167             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 168                 RECT_SET(extra, r->x, r->y,
 169                          RECT_LEFT(isect) - r->x, r->height);
 170                 result = area_add(result, &extra);
 171             }
 172
 173             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 174                 RECT_SET(extra, r->x, r->y,
 175                          r->width, RECT_TOP(isect) - r->y + 1);
 176                 result = area_add(result, &extra);
 177             }
 178
 179             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 180                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 181                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 182                 result = area_add(result, &extra);
 183             }
 184
 185             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 186                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 187                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 188                 result = area_add(result, &extra);
 189             }
 190         }
 191
 192         g_free(r);
 193     }
 194     g_slist_free(list);
 195     return result;
 196 }
 197
 198 static gint area_cmp(gconstpointer p1, gconstpointer p2, gpointer data)
 199 {
 200     ObClient *c = data;
 201     Rect *carea = &c->frame->area;
 202     const Rect *a1 = p1, *a2 = p2;
 203     gboolean diffhead = FALSE;
 204     guint i;
 205     Rect *a;
 206
 207     for (i = 0; i < screen_num_monitors; ++i) {
 208         a = screen_physical_area_monitor(i);
 209         if (RECT_CONTAINS(*a, a1->x, a1->y) &&
 210             !RECT_CONTAINS(*a, a2->x, a2->y))
 211         {
 212             diffhead = TRUE;
 213             break;
 214         }
 215     }
 216
 217     /* has to be more than me in the group */
 218     if (diffhead && client_has_group_siblings(c)) {
 219         guint *num, most;
 220         GSList *it;
 221
 222         /* find how many clients in the group are on each monitor, use the
 223            monitor with the most in it */
 224         num = g_new0(guint, screen_num_monitors);
 225         for (it = c->group->members; it; it = g_slist_next(it))
 226             if (it->data != c)
 227                 ++num[client_monitor(it->data)];
 228         most = 0;
 229         for (i = 1; i < screen_num_monitors; ++i)
 230             if (num[i] > num[most])
 231                 most = i;
 232
 233         g_free(num);
 234
 235         a = screen_physical_area_monitor(most);
 236         if (RECT_CONTAINS(*a, a1->x, a1->y))
 237             return -1;
 238         if (RECT_CONTAINS(*a, a2->x, a2->y))
 239             return 1;
 240     }
 241
 242     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 243         MIN((a2->width - carea->width), (a2->height - carea->height));
 244 }
 245
 246 typedef enum
 247 {
 248     SMART_FULL,
 249     SMART_GROUP,
 250     SMART_FOCUSED
 251 } ObSmartType;
 252
 253 #define SMART_IGNORE(placer, c) \
 254     (placer == c || !c->frame->visible || c->shaded || !client_normal(c) || \
 255      (c->desktop != DESKTOP_ALL && \
 256       c->desktop != (placer->desktop == DESKTOP_ALL ? \
 257                      screen_desktop : placer->desktop)))
 258
 259 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 260                             ObSmartType type)
 261 {
 262     gboolean ret = FALSE;
 263     GSList *spaces = NULL, *sit;
 264     GList *it;
 265     Rect **areas;
 266     guint i;
 267
 268     if (type == SMART_GROUP) {
 269         /* has to be more than me in the group */
 270         if (!client_has_group_siblings(client))
 271             return FALSE;
 272     }
 273
 274     areas = pick_head(client);
 275
 276     for (i = 0; i < screen_num_monitors; ++i) {
 277         spaces = area_add(spaces, areas[i]);
 278
 279         /* stay out from under windows in higher layers */
 280         for (it = stacking_list; it; it = g_list_next(it)) {
 281             ObClient *c;
 282
 283             if (WINDOW_IS_CLIENT(it->data)) {
 284                 c = it->data;
 285                 if (c->fullscreen)
 286                     continue;
 287             } else
 288                 continue;
 289
 290             if (c->layer > client->layer) {
 291                 if (!SMART_IGNORE(client, c))
 292                     spaces = area_remove(spaces, &c->frame->area);
 293             } else
 294                 break;
 295         }
 296
 297         if (type == SMART_FULL || type == SMART_FOCUSED) {
 298             gboolean found_foc = FALSE, stop = FALSE;
 299             ObClient *foc;
 300             GList *list;
 301
 302             list = focus_order[client->desktop == DESKTOP_ALL ?
 303                                screen_desktop : client->desktop];
 304             foc = list ? list->data : NULL;
 305
 306             for (; it && !stop; it = g_list_next(it)) {
 307                 ObClient *c;
 308
 309                 if (WINDOW_IS_CLIENT(it->data)) {
 310                     c = it->data;
 311                     if (c->fullscreen)
 312                         continue;
 313                 } else
 314                     continue;
 315
 316                 if (!SMART_IGNORE(client, c)) {
 317                     if (type == SMART_FOCUSED)
 318                         if (found_foc)
 319                             stop = TRUE;
 320                     if (!stop)
 321                         spaces = area_remove(spaces, &c->frame->area);
 322                 }
 323
 324                 if (c == foc)
 325                     found_foc = TRUE;
 326             }
 327         } else if (type == SMART_GROUP) {
 328             for (sit = client->group->members; sit; sit = g_slist_next(sit)) {
 329                 ObClient *c = sit->data;
 330                 if (!SMART_IGNORE(client, c))
 331                     spaces = area_remove(spaces, &c->frame->area);
 332             }
 333         } else
 334             g_assert_not_reached();
 335
 336         spaces = g_slist_sort_with_data(spaces, area_cmp, client);
 337
 338         for (sit = spaces; sit; sit = g_slist_next(sit)) {
 339             Rect *r = sit->data;
 340
 341             if (!ret) {
 342                 if (r->width >= client->frame->area.width &&
 343                     r->height >= client->frame->area.height) {
 344                     ret = TRUE;
 345                     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 346                         type != SMART_FULL)
 347                     {
 348                         *x = r->x + (r->width - client->frame->area.width)/2;
 349                         *y = r->y + (r->height - client->frame->area.height)/2;
 350                     } else {
 351                         *x = r->x;
 352                         *y = r->y;
 353                     }
 354                 }
 355             }
 356
 357             g_free(r);
 358         }
 359         g_slist_free(spaces);
 360         spaces = NULL;
 361     }
 362
 363     g_free(areas);
 364
 365     return ret;
 366 }
 367
 368 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 369 {
 370     gint l, r, t, b;
 371     gint px, py;
 372     Rect *area;
 373
 374     area = pick_pointer_head(client);
 375
 376     l = area->x;
 377     t = area->y;
 378     r = area->x + area->width - client->frame->area.width;
 379     b = area->y + area->height - client->frame->area.height;
 380
 381     *x = px - client->area.width / 2 - client->frame->size.left;
 382     *x = MIN(MAX(*x, l), r);
 383     *y = py - client->area.height / 2 - client->frame->size.top;
 384     *y = MIN(MAX(*y, t), b);
 385
 386     return TRUE;
 387 }
 388
 389 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 390                                       ObAppSettings *settings)
 391 {
 392     Rect *screen;
 393
 394     if (!settings || (settings && !settings->pos_given))
 395         return FALSE;
 396
 397     /* Find which head the pointer is on */
 398     if (settings->head == -1)
 399         screen = pick_pointer_head(client);
 400     else
 401         screen = screen_area_monitor(client->desktop, settings->head);
 402
 403     if (settings->center_x)
 404         *x = screen->x + screen->width / 2 - client->area.width / 2;
 405     else
 406         *x = screen->x + settings->position.x;
 407
 408     if (settings->center_y)
 409         *y = screen->y + screen->height / 2 - client->area.height / 2;
 410     else
 411         *y = screen->y + settings->position.y;
 412
 413     return TRUE;
 414 }
 415
 416 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 417 {
 418     if (client->transient_for) {
 419         if (client->transient_for != OB_TRAN_GROUP) {
 420             ObClient *c = client;
 421             ObClient *p = client->transient_for;
 422             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 423                 p->frame->area.x;
 424             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 425                 p->frame->area.y;
 426             return TRUE;
 427         } else {
 428             GSList *it;
 429             gboolean first = TRUE;
 430             gint l, r, t, b;
 431             for (it = client->group->members; it; it = g_slist_next(it)) {
 432                 ObClient *m = it->data;
 433                 if (!(m == client || m->transient_for)) {
 434                     if (first) {
 435                         l = RECT_LEFT(m->frame->area);
 436                         t = RECT_TOP(m->frame->area);
 437                         r = RECT_RIGHT(m->frame->area);
 438                         b = RECT_BOTTOM(m->frame->area);
 439                         first = FALSE;
 440                     } else {
 441                         l = MIN(l, RECT_LEFT(m->frame->area));
 442                         t = MIN(t, RECT_TOP(m->frame->area));
 443                         r = MAX(r, RECT_RIGHT(m->frame->area));
 444                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 445                     }
 446                 }
 447             }
 448             if (!first) {
 449                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 450                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 451                 return TRUE;
 452             }
 453         }
 454     }
 455     return FALSE;
 456 }
 457
 458 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 459 gboolean place_client(ObClient *client, gint *x, gint *y,
 460                       ObAppSettings *settings)
 461 {
 462     gboolean ret = FALSE;
 463     if (client->positioned)
 464         return FALSE;
 465     if (place_transient(client, x, y))
 466         ret = TRUE;
 467     else if (!(
 468         place_per_app_setting(client, x, y, settings) ||
 469         ((config_place_policy == OB_PLACE_POLICY_MOUSE) ?
 470          place_under_mouse(client, x, y) :
 471          place_smart(client, x, y, SMART_FULL)    ||
 472          place_smart(client, x, y, SMART_GROUP)   ||
 473          place_smart(client, x, y, SMART_FOCUSED) ||
 474          place_random(client, x, y))))
 475         g_assert_not_reached(); /* the last one better succeed */
 476     /* get where the client should be */
 477     frame_frame_gravity(client->frame, x, y);
 478     return ret;
 479 }