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