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         Rect *monitor = screen_physical_area_monitor(i);
  50         gboolean contain = RECT_CONTAINS(*monitor, px, py);
  51         g_free(monitor);
  52         if (contain)
  53             return screen_area_monitor(c->desktop, i, NULL);
  54     }
  55     g_assert_not_reached();
  56 }
  57
  58 /*! Pick a monitor to place a window on. */
  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         Rect *monitor = screen_physical_area_monitor(i);
 117         gboolean contain = RECT_CONTAINS(*monitor, px, py);
 118         g_free(monitor);
 119         if (contain) {
 120             add_choice(choice, i);
 121             ob_debug("placement adding choice %d for mouse pointer\n", i);
 122             break;
 123         }
 124     }
 125
 126     /* add any leftover choices */
 127     for (i = 0; i < screen_num_monitors; ++i)
 128         add_choice(choice, i);
 129
 130     for (i = 0; i < screen_num_monitors; ++i)
 131         area[i] = screen_area_monitor(c->desktop, choice[i], NULL);
 132
 133     return area;
 134 }
 135
 136 static gboolean place_random(ObClient *client, gint *x, gint *y)
 137 {
 138     gint l, r, t, b;
 139     Rect **areas;
 140     guint i;
 141
 142     areas = pick_head(client);
 143     i = g_random_int_range(0, screen_num_monitors);
 144
 145     l = areas[i]->x;
 146     t = areas[i]->y;
 147     r = areas[i]->x + areas[i]->width - client->frame->area.width;
 148     b = areas[i]->y + areas[i]->height - client->frame->area.height;
 149
 150     if (r > l) *x = g_random_int_range(l, r + 1);
 151     else       *x = areas[i]->x;
 152     if (b > t) *y = g_random_int_range(t, b + 1);
 153     else       *y = areas[i]->y;
 154
 155     for (i = 0; i < screen_num_monitors; ++i)
 156         g_free(areas[i]);
 157     g_free(areas);
 158
 159     return TRUE;
 160 }
 161
 162 static GSList* area_add(GSList *list, Rect *a)
 163 {
 164     Rect *r = g_new(Rect, 1);
 165     *r = *a;
 166     return g_slist_prepend(list, r);
 167 }
 168
 169 static GSList* area_remove(GSList *list, Rect *a)
 170 {
 171     GSList *sit;
 172     GSList *result = NULL;
 173
 174     for (sit = list; sit; sit = g_slist_next(sit)) {
 175         Rect *r = sit->data;
 176
 177         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 178             result = g_slist_prepend(result, r);
 179             r = NULL; /* dont free it */
 180         } else {
 181             Rect isect, extra;
 182
 183             /* Use an intersection of a and r to determine the space
 184                around r that we can use.
 185
 186                NOTE: the spaces calculated can overlap.
 187             */
 188
 189             RECT_SET_INTERSECTION(isect, *r, *a);
 190
 191             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 192                 RECT_SET(extra, r->x, r->y,
 193                          RECT_LEFT(isect) - r->x, r->height);
 194                 result = area_add(result, &extra);
 195             }
 196
 197             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 198                 RECT_SET(extra, r->x, r->y,
 199                          r->width, RECT_TOP(isect) - r->y + 1);
 200                 result = area_add(result, &extra);
 201             }
 202
 203             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 204                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 205                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 206                 result = area_add(result, &extra);
 207             }
 208
 209             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 210                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 211                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 212                 result = area_add(result, &extra);
 213             }
 214         }
 215
 216         g_free(r);
 217     }
 218     g_slist_free(list);
 219     return result;
 220 }
 221
 222 enum {
 223     IGNORE_FULLSCREEN = 1 << 0,
 224     IGNORE_MAXIMIZED  = 1 << 1,
 225     IGNORE_MENUTOOL   = 1 << 2,
 226     /*IGNORE_SHADED     = 1 << 3,*/
 227     IGNORE_NONGROUP   = 1 << 3,
 228     IGNORE_BELOW      = 1 << 4,
 229     IGNORE_NONFOCUS   = 1 << 5,
 230     IGNORE_END        = 1 << 6
 231 };
 232
 233 static gboolean place_nooverlap(ObClient *c, gint *x, gint *y)
 234 {
 235     Rect **areas;
 236     gint ignore;
 237     gboolean ret;
 238     gint maxsize;
 239     GSList *spaces = NULL, *sit, *maxit;
 240     guint i;
 241
 242     areas = pick_head(c);
 243     ret = FALSE;
 244     maxsize = 0;
 245     maxit = NULL;
 246
 247     /* try ignoring different things to find empty space */
 248     for (ignore = 0; ignore < IGNORE_END && !ret; ignore = (ignore << 1) + 1) {
 249         guint i;
 250
 251         /* try all monitors in order of preference */
 252         for (i = 0; i < screen_num_monitors && !ret; ++i) {
 253             GList *it;
 254
 255             /* add the whole monitor */
 256             spaces = area_add(spaces, areas[i]);
 257
 258             /* go thru all the windows */
 259             for (it = client_list; it; it = g_list_next(it)) {
 260                 ObClient *test = it->data;
 261
 262                 /* should we ignore this client? */
 263                 if (screen_showing_desktop) continue;
 264                 if (c == test) continue;
 265                 if (test->iconic) continue;
 266                 if (c->desktop != DESKTOP_ALL) {
 267                     if (test->desktop != c->desktop &&
 268                         test->desktop != DESKTOP_ALL) continue;
 269                 } else {
 270                     if (test->desktop != screen_desktop &&
 271                         test->desktop != DESKTOP_ALL) continue;
 272                 }
 273                 if (test->type == OB_CLIENT_TYPE_SPLASH ||
 274                     test->type == OB_CLIENT_TYPE_DESKTOP) continue;
 275
 276
 277                 if ((ignore & IGNORE_FULLSCREEN) &&
 278                     test->fullscreen) continue;
 279                 if ((ignore & IGNORE_MAXIMIZED) &&
 280                     test->max_horz && test->max_vert) continue;
 281                 if ((ignore & IGNORE_MENUTOOL) &&
 282                     (test->type == OB_CLIENT_TYPE_MENU ||
 283                      test->type == OB_CLIENT_TYPE_TOOLBAR) &&
 284                     client_has_parent(c)) continue;
 285                 /*
 286                 if ((ignore & IGNORE_SHADED) &&
 287                     test->shaded) continue;
 288                 */
 289                 if ((ignore & IGNORE_NONGROUP) &&
 290                     client_has_group_siblings(c) &&
 291                     test->group != c->group) continue;
 292                 if ((ignore & IGNORE_BELOW) &&
 293                     test->layer < c->layer) continue;
 294                 if ((ignore & IGNORE_NONFOCUS) &&
 295                     focus_client != test) continue;
 296
 297                 /* don't ignore this window, so remove it from the available
 298                    area */
 299                 spaces = area_remove(spaces, &test->frame->area);
 300             }
 301
 302             for (sit = spaces; sit; sit = g_slist_next(sit)) {
 303                 Rect *r = sit->data;
 304
 305                 if (r->width >= c->frame->area.width &&
 306                     r->height >= c->frame->area.height &&
 307                     r->width > maxsize)
 308                 {
 309                     maxsize = r->width;
 310                     maxit = sit;
 311                 }
 312             }
 313
 314             if (maxit) {
 315                 Rect *r = maxit->data;
 316
 317                 /* center it in the area */
 318                 *x = r->x + (r->width - c->frame->area.width) / 2;
 319                 *y = r->y + (r->height - c->frame->area.height) / 2;
 320                 ret = TRUE;
 321             }
 322
 323             while (spaces) {
 324                 g_free(spaces->data);
 325                 spaces = g_slist_delete_link(spaces, spaces);
 326             }
 327         }
 328     }
 329
 330     for (i = 0; i < screen_num_monitors; ++i)
 331         g_free(areas[i]);
 332     g_free(areas);
 333     return ret;
 334 }
 335
 336 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 337 {
 338     gint l, r, t, b;
 339     gint px, py;
 340     Rect *area;
 341
 342     if (!screen_pointer_pos(&px, &py))
 343         return FALSE;
 344     area = pick_pointer_head(client);
 345
 346     l = area->x;
 347     t = area->y;
 348     r = area->x + area->width - client->frame->area.width;
 349     b = area->y + area->height - client->frame->area.height;
 350
 351     *x = px - client->area.width / 2 - client->frame->size.left;
 352     *x = MIN(MAX(*x, l), r);
 353     *y = py - client->area.height / 2 - client->frame->size.top;
 354     *y = MIN(MAX(*y, t), b);
 355
 356     return TRUE;
 357 }
 358
 359 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 360                                       ObAppSettings *settings)
 361 {
 362     Rect *screen = NULL;
 363
 364     if (!settings || (settings && !settings->pos_given))
 365         return FALSE;
 366
 367     /* Find which head the pointer is on */
 368     if (settings->monitor == 0)
 369         screen = pick_pointer_head(client);
 370     else if (settings->monitor > 0 &&
 371              (guint)settings->monitor <= screen_num_monitors)
 372         screen = screen_area_monitor(client->desktop,
 373                                      (guint)settings->monitor - 1, NULL);
 374     else {
 375         Rect **areas;
 376         guint i;
 377
 378         areas = pick_head(client);
 379         screen = areas[0];
 380
 381         for (i = 0; i < screen_num_monitors; ++i)
 382             g_free(areas[i]);
 383         g_free(areas);
 384     }
 385
 386     if (settings->center_x)
 387         *x = screen->x + screen->width / 2 - client->area.width / 2;
 388     else if (settings->opposite_x)
 389         *x = screen->x + screen->width - client->frame->area.width -
 390             settings->position.x;
 391     else
 392         *x = screen->x + settings->position.x;
 393
 394     if (settings->center_y)
 395         *y = screen->y + screen->height / 2 - client->area.height / 2;
 396     else if (settings->opposite_y)
 397         *y = screen->y + screen->height - client->frame->area.height -
 398             settings->position.y;
 399     else
 400         *y = screen->y + settings->position.y;
 401
 402     return TRUE;
 403 }
 404
 405 static gboolean place_transient_splash(ObClient *client, gint *x, gint *y)
 406 {
 407     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 408         GSList *it;
 409         gboolean first = TRUE;
 410         gint l, r, t, b;
 411         for (it = client->parents; it; it = g_slist_next(it)) {
 412             ObClient *m = it->data;
 413             if (!m->iconic) {
 414                 if (first) {
 415                     l = RECT_LEFT(m->frame->area);
 416                     t = RECT_TOP(m->frame->area);
 417                     r = RECT_RIGHT(m->frame->area);
 418                     b = RECT_BOTTOM(m->frame->area);
 419                     first = FALSE;
 420                 } else {
 421                     l = MIN(l, RECT_LEFT(m->frame->area));
 422                     t = MIN(t, RECT_TOP(m->frame->area));
 423                     r = MAX(r, RECT_RIGHT(m->frame->area));
 424                     b = MAX(b, RECT_BOTTOM(m->frame->area));
 425                 }
 426             }
 427             if (!first) {
 428                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 429                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 430                 return TRUE;
 431             }
 432         }
 433     }
 434
 435     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 436         client->type == OB_CLIENT_TYPE_SPLASH)
 437     {
 438         Rect **areas;
 439         guint i;
 440
 441         areas = pick_head(client);
 442
 443         *x = (areas[0]->width - client->frame->area.width) / 2 + areas[0]->x;
 444         *y = (areas[0]->height - client->frame->area.height) / 2 + areas[0]->y;
 445
 446         for (i = 0; i < screen_num_monitors; ++i)
 447             g_free(areas[i]);
 448         g_free(areas);
 449         return TRUE;
 450     }
 451
 452     return FALSE;
 453 }
 454
 455 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 456 gboolean place_client(ObClient *client, gint *x, gint *y,
 457                       ObAppSettings *settings)
 458 {
 459     gboolean ret;
 460
 461     if (client->positioned)
 462         return FALSE;
 463
 464     /* try a number of methods */
 465     ret = place_transient_splash(client, x, y) ||
 466         place_per_app_setting(client, x, y, settings) ||
 467         (config_place_policy == OB_PLACE_POLICY_MOUSE &&
 468          place_under_mouse(client, x, y)) ||
 469         place_nooverlap(client, x, y) ||
 470         place_under_mouse(client, x, y) ||
 471         place_random(client, x, y);
 472     g_assert(ret);
 473
 474     /* get where the client should be */
 475     frame_frame_gravity(client->frame, x, y,
 476                         client->area.width, client->area.height);
 477     return ret;
 478 }