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