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) 2003-2007   Dana 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 #include "debug.h"
  27
  28 static void add_choice(guint *choice, guint mychoice)
  29 {
  30     guint i;
  31     for (i = 0; i < screen_num_monitors; ++i) {
  32         if (choice[i] == mychoice)
  33             return;
  34         else if (choice[i] == screen_num_monitors) {
  35             choice[i] = mychoice;
  36             return;
  37         }
  38     }
  39 }
  40
  41 static Rect *pick_pointer_head(ObClient *c)
  42 {
  43     guint i;
  44     gint px, py;
  45
  46     screen_pointer_pos(&px, &py);
  47
  48     for (i = 0; i < screen_num_monitors; ++i) {
  49         if (RECT_CONTAINS(*screen_physical_area_monitor(i), px, py)) {
  50             return screen_area_monitor(c->desktop, i);
  51         }
  52     }
  53     g_assert_not_reached();
  54 }
  55
  56 /*! Pick a monitor to place a window on.
  57   The returned array value should be freed with g_free. The areas within the
  58   array should not be freed. */
  59 static Rect **pick_head(ObClient *c)
  60 {
  61     Rect **area;
  62     guint *choice;
  63     guint i;
  64     gint px, py;
  65
  66     area = g_new(Rect*, screen_num_monitors);
  67     choice = g_new(guint, screen_num_monitors);
  68     for (i = 0; i < screen_num_monitors; ++i)
  69         choice[i] = screen_num_monitors; /* make them all invalid to start */
  70
  71     /* try direct parent first */
  72     if (c->transient_for && c->transient_for != OB_TRAN_GROUP &&
  73         client_normal(c->transient_for))
  74     {
  75         add_choice(choice, client_monitor(c->transient_for));
  76         ob_debug("placement adding choice %d for parent\n",
  77                  client_monitor(c->transient_for));
  78     }
  79
  80     /* more than one window in its group (more than just this window) */
  81     if (client_has_group_siblings(c)) {
  82         GSList *it;
  83
  84         /* try on the client's desktop */
  85         for (it = c->group->members; it; it = g_slist_next(it)) {
  86             ObClient *itc = it->data;
  87             if (itc != c &&
  88                 (itc->desktop == c->desktop ||
  89                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  90             {
  91                 add_choice(choice, client_monitor(it->data));
  92                 ob_debug("placement adding choice %d for group sibling\n",
  93                          client_monitor(it->data));
  94             }
  95         }
  96
  97         /* try on all desktops */
  98         for (it = c->group->members; it; it = g_slist_next(it)) {
  99             ObClient *itc = it->data;
 100             if (itc != c) {
 101                 add_choice(choice, client_monitor(it->data));
 102                 ob_debug("placement adding choice %d for group sibling on "
 103                          "another desktop\n", client_monitor(it->data));
 104             }
 105         }
 106     }
 107
 108     if (focus_client) {
 109         add_choice(choice, client_monitor(focus_client));
 110         ob_debug("placement adding choice %d for focused window\n",
 111                  client_monitor(focus_client));
 112     }
 113
 114     screen_pointer_pos(&px, &py);
 115
 116     for (i = 0; i < screen_num_monitors; i++)
 117         if (RECT_CONTAINS(*screen_physical_area_monitor(i), px, py)) {
 118             add_choice(choice, i);
 119             ob_debug("placement adding choice %d for mouse pointer\n", i);
 120             break;
 121         }
 122
 123     /* add any leftover choices */
 124     for (i = 0; i < screen_num_monitors; ++i)
 125         add_choice(choice, i);
 126
 127     for (i = 0; i < screen_num_monitors; ++i)
 128         area[i] = screen_area_monitor(c->desktop, choice[i]);
 129
 130     return area;
 131 }
 132
 133 static gboolean place_random(ObClient *client, gint *x, gint *y)
 134 {
 135     gint l, r, t, b;
 136     Rect **areas;
 137     guint i;
 138
 139     areas = pick_head(client);
 140     i = g_random_int_range(0, screen_num_monitors);
 141
 142     l = areas[i]->x;
 143     t = areas[i]->y;
 144     r = areas[i]->x + areas[i]->width - client->frame->area.width;
 145     b = areas[i]->y + areas[i]->height - client->frame->area.height;
 146
 147     if (r > l) *x = g_random_int_range(l, r + 1);
 148     else       *x = areas[i]->x;
 149     if (b > t) *y = g_random_int_range(t, b + 1);
 150     else       *y = areas[i]->y;
 151
 152     g_free(areas);
 153
 154     return TRUE;
 155 }
 156
 157 static GSList* area_add(GSList *list, Rect *a)
 158 {
 159     Rect *r = g_new(Rect, 1);
 160     *r = *a;
 161     return g_slist_prepend(list, r);
 162 }
 163
 164 static GSList* area_remove(GSList *list, Rect *a)
 165 {
 166     GSList *sit;
 167     GSList *result = NULL;
 168
 169     for (sit = list; sit; sit = g_slist_next(sit)) {
 170         Rect *r = sit->data;
 171
 172         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 173             result = g_slist_prepend(result, r);
 174             r = NULL; /* dont free it */
 175         } else {
 176             Rect isect, extra;
 177
 178             /* Use an intersection of a and r to determine the space
 179                around r that we can use.
 180
 181                NOTE: the spaces calculated can overlap.
 182             */
 183
 184             RECT_SET_INTERSECTION(isect, *r, *a);
 185
 186             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 187                 RECT_SET(extra, r->x, r->y,
 188                          RECT_LEFT(isect) - r->x, r->height);
 189                 result = area_add(result, &extra);
 190             }
 191
 192             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 193                 RECT_SET(extra, r->x, r->y,
 194                          r->width, RECT_TOP(isect) - r->y + 1);
 195                 result = area_add(result, &extra);
 196             }
 197
 198             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 199                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 200                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 201                 result = area_add(result, &extra);
 202             }
 203
 204             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 205                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 206                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 207                 result = area_add(result, &extra);
 208             }
 209         }
 210
 211         g_free(r);
 212     }
 213     g_slist_free(list);
 214     return result;
 215 }
 216
 217 static gint area_cmp(gconstpointer p1, gconstpointer p2, gpointer data)
 218 {
 219     ObClient *c = data;
 220     Rect *carea = &c->frame->area;
 221     const Rect *a1 = p1, *a2 = p2;
 222     gboolean diffhead = FALSE;
 223     guint i;
 224     Rect *a;
 225
 226     for (i = 0; i < screen_num_monitors; ++i) {
 227         a = screen_physical_area_monitor(i);
 228         if (RECT_CONTAINS(*a, a1->x, a1->y) &&
 229             !RECT_CONTAINS(*a, a2->x, a2->y))
 230         {
 231             diffhead = TRUE;
 232             break;
 233         }
 234     }
 235
 236     /* has to be more than me in the group */
 237     if (diffhead && client_has_group_siblings(c)) {
 238         guint *num, most;
 239         GSList *it;
 240
 241         /* find how many clients in the group are on each monitor, use the
 242            monitor with the most in it */
 243         num = g_new0(guint, screen_num_monitors);
 244         for (it = c->group->members; it; it = g_slist_next(it))
 245             if (it->data != c)
 246                 ++num[client_monitor(it->data)];
 247         most = 0;
 248         for (i = 1; i < screen_num_monitors; ++i)
 249             if (num[i] > num[most])
 250                 most = i;
 251
 252         g_free(num);
 253
 254         a = screen_physical_area_monitor(most);
 255         if (RECT_CONTAINS(*a, a1->x, a1->y))
 256             return -1;
 257         if (RECT_CONTAINS(*a, a2->x, a2->y))
 258             return 1;
 259     }
 260
 261     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 262         MIN((a2->width - carea->width), (a2->height - carea->height));
 263 }
 264
 265 typedef enum
 266 {
 267     SMART_FULL,
 268     SMART_GROUP,
 269     SMART_FOCUSED
 270 } ObSmartType;
 271
 272 #define SMART_IGNORE(placer, c) \
 273     (placer == c || c->shaded || !c->frame->visible || \
 274      c->type == OB_CLIENT_TYPE_SPLASH || c->type == OB_CLIENT_TYPE_DESKTOP || \
 275      ((c->type == OB_CLIENT_TYPE_MENU || c->type == OB_CLIENT_TYPE_TOOLBAR) &&\
 276       client_has_parent(c)) || \
 277      (c->desktop != DESKTOP_ALL && \
 278       c->desktop != (placer->desktop == DESKTOP_ALL ? \
 279                      screen_desktop : placer->desktop)))
 280
 281 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 282                             ObSmartType type, gboolean ignore_max)
 283 {
 284     gboolean ret = FALSE;
 285     GSList *spaces = NULL, *sit;
 286     GList *it;
 287     Rect **areas;
 288     guint i;
 289
 290     if (type == SMART_GROUP) {
 291         /* has to be more than me in the group */
 292         if (!client_has_group_siblings(client))
 293             return FALSE;
 294     }
 295
 296     areas = pick_head(client);
 297
 298     for (i = 0; i < screen_num_monitors && !ret; ++i) {
 299         spaces = area_add(spaces, areas[i]);
 300
 301         /* stay out from under windows in higher layers */
 302         for (it = stacking_list; it; it = g_list_next(it)) {
 303             ObClient *c;
 304
 305             if (WINDOW_IS_CLIENT(it->data)) {
 306                 c = it->data;
 307                 if (ignore_max &&
 308                     (c->fullscreen || (c->max_vert && c->max_horz)))
 309                     continue;
 310             } else
 311                 continue;
 312
 313             if (c->layer > client->layer) {
 314                 if (!SMART_IGNORE(client, c))
 315                     spaces = area_remove(spaces, &c->frame->area);
 316             } else
 317                 break;
 318         }
 319
 320         if (type == SMART_FULL || type == SMART_FOCUSED) {
 321             gboolean found_foc = FALSE, stop = FALSE;
 322             ObClient *foc;
 323
 324             foc = focus_order_find_first(client->desktop == DESKTOP_ALL ?
 325                                          screen_desktop : client->desktop);
 326
 327             for (; it && !stop; it = g_list_next(it)) {
 328                 ObClient *c;
 329
 330                 if (WINDOW_IS_CLIENT(it->data)) {
 331                     c = it->data;
 332                     if (ignore_max &&
 333                         (c->fullscreen || (c->max_vert && c->max_horz)))
 334                         continue;
 335                 } else
 336                     continue;
 337
 338                 if (!SMART_IGNORE(client, c)) {
 339                     if (type == SMART_FOCUSED)
 340                         if (found_foc)
 341                             stop = TRUE;
 342                     if (!stop)
 343                         spaces = area_remove(spaces, &c->frame->area);
 344                 }
 345
 346                 if (c == foc)
 347                     found_foc = TRUE;
 348             }
 349         } else if (type == SMART_GROUP) {
 350             for (sit = client->group->members; sit; sit = g_slist_next(sit)) {
 351                 ObClient *c = sit->data;
 352                 if (!SMART_IGNORE(client, c))
 353                     spaces = area_remove(spaces, &c->frame->area);
 354             }
 355         } else
 356             g_assert_not_reached();
 357
 358         spaces = g_slist_sort_with_data(spaces, area_cmp, client);
 359
 360         for (sit = spaces; sit; sit = g_slist_next(sit)) {
 361             Rect *r = sit->data;
 362
 363             if (!ret) {
 364                 if (r->width >= client->frame->area.width &&
 365                     r->height >= client->frame->area.height) {
 366                     ret = TRUE;
 367                     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 368                         type != SMART_FULL)
 369                     {
 370                         *x = r->x + (r->width - client->frame->area.width)/2;
 371                         *y = r->y + (r->height - client->frame->area.height)/2;
 372                     } else {
 373                         *x = r->x;
 374                         *y = r->y;
 375                     }
 376                 }
 377             }
 378
 379             g_free(r);
 380         }
 381         g_slist_free(spaces);
 382         spaces = NULL;
 383     }
 384
 385     g_free(areas);
 386
 387     return ret;
 388 }
 389
 390 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 391 {
 392     gint l, r, t, b;
 393     gint px, py;
 394     Rect *area;
 395
 396     area = pick_pointer_head(client);
 397     screen_pointer_pos(&px, &py);
 398
 399     l = area->x;
 400     t = area->y;
 401     r = area->x + area->width - client->frame->area.width;
 402     b = area->y + area->height - client->frame->area.height;
 403
 404     *x = px - client->area.width / 2 - client->frame->size.left;
 405     *x = MIN(MAX(*x, l), r);
 406     *y = py - client->area.height / 2 - client->frame->size.top;
 407     *y = MIN(MAX(*y, t), b);
 408
 409     return TRUE;
 410 }
 411
 412 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 413                                       ObAppSettings *settings)
 414 {
 415     Rect *screen = NULL;
 416
 417     if (!settings || (settings && !settings->pos_given))
 418         return FALSE;
 419
 420     /* Find which head the pointer is on */
 421     if (settings->monitor == 0)
 422         screen = pick_pointer_head(client);
 423     else if (settings->monitor > 0 &&
 424              (guint)settings->monitor <= screen_num_monitors)
 425         screen = screen_area_monitor(client->desktop,
 426                                      (guint)settings->monitor - 1);
 427     else {
 428         Rect **all = NULL;
 429         all = pick_head(client);
 430         screen = all[0];
 431         g_free(all); /* the areas themselves don't need to be freed */
 432     }
 433
 434     if (settings->center_x)
 435         *x = screen->x + screen->width / 2 - client->area.width / 2;
 436     else
 437         *x = screen->x + settings->position.x;
 438
 439     if (settings->center_y)
 440         *y = screen->y + screen->height / 2 - client->area.height / 2;
 441     else
 442         *y = screen->y + settings->position.y;
 443
 444     return TRUE;
 445 }
 446
 447 static gboolean place_transient_splash(ObClient *client, gint *x, gint *y)
 448 {
 449     if (client->transient_for && client->type == OB_CLIENT_TYPE_DIALOG) {
 450         if (client->transient_for != OB_TRAN_GROUP && !client->iconic) {
 451             ObClient *c = client;
 452             ObClient *p = client->transient_for;
 453
 454             if (client_normal(p)) {
 455                 *x = (p->frame->area.width - c->frame->area.width) / 2 +
 456                     p->frame->area.x;
 457                 *y = (p->frame->area.height - c->frame->area.height) / 2 +
 458                     p->frame->area.y;
 459                 return TRUE;
 460             }
 461         } else {
 462             GSList *it;
 463             gboolean first = TRUE;
 464             gint l, r, t, b;
 465             for (it = client->group->members; it; it = g_slist_next(it)) {
 466                 ObClient *m = it->data;
 467                 if (!(m == client || m->transient_for) && client_normal(m) &&
 468                     !m->iconic)
 469                 {
 470                     if (first) {
 471                         l = RECT_LEFT(m->frame->area);
 472                         t = RECT_TOP(m->frame->area);
 473                         r = RECT_RIGHT(m->frame->area);
 474                         b = RECT_BOTTOM(m->frame->area);
 475                         first = FALSE;
 476                     } else {
 477                         l = MIN(l, RECT_LEFT(m->frame->area));
 478                         t = MIN(t, RECT_TOP(m->frame->area));
 479                         r = MAX(r, RECT_RIGHT(m->frame->area));
 480                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 481                     }
 482                 }
 483             }
 484             if (!first) {
 485                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 486                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 487                 return TRUE;
 488             }
 489         }
 490     }
 491
 492     if ((client->transient && client->type == OB_CLIENT_TYPE_DIALOG)
 493         || client->type == OB_CLIENT_TYPE_SPLASH)
 494     {
 495         Rect **areas;
 496
 497         areas = pick_head(client);
 498
 499         *x = (areas[0]->width - client->frame->area.width) / 2 + areas[0]->x;
 500         *y = (areas[0]->height - client->frame->area.height) / 2 + areas[0]->y;
 501
 502         g_free(areas);
 503         return TRUE;
 504     }
 505
 506     return FALSE;
 507 }
 508
 509 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 510 gboolean place_client(ObClient *client, gint *x, gint *y,
 511                       ObAppSettings *settings)
 512 {
 513     gboolean ret = FALSE;
 514     if (client->positioned)
 515         return FALSE;
 516     if (place_transient_splash(client, x, y))
 517         ret = TRUE;
 518     else if (!(
 519         place_per_app_setting(client, x, y, settings) ||
 520         ((config_place_policy == OB_PLACE_POLICY_MOUSE) ?
 521          place_under_mouse(client, x, y) :
 522          place_smart(client, x, y, SMART_FULL, FALSE)   ||
 523          place_smart(client, x, y, SMART_FULL, TRUE)    ||
 524          place_smart(client, x, y, SMART_GROUP, FALSE)  ||
 525          place_smart(client, x, y, SMART_GROUP, TRUE)   ||
 526          place_smart(client, x, y, SMART_FOCUSED, TRUE) ||
 527          place_random(client, x, y))))
 528         g_assert_not_reached(); /* the last one better succeed */
 529     /* get where the client should be */
 530     frame_frame_gravity(client->frame, x, y,
 531                         client->area.width, client->area.height);
 532     return ret;
 533 }