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 "dock.h"
  27 #include "debug.h"
  28
  29 extern ObDock *dock;
  30
  31 static void add_choice(guint *choice, guint mychoice)
  32 {
  33     guint i;
  34     for (i = 0; i < screen_num_monitors; ++i) {
  35         if (choice[i] == mychoice)
  36             return;
  37         else if (choice[i] == screen_num_monitors) {
  38             choice[i] = mychoice;
  39             return;
  40         }
  41     }
  42 }
  43
  44 static Rect *pick_pointer_head(ObClient *c)
  45 {
  46     guint i;
  47     gint px, py;
  48
  49     screen_pointer_pos(&px, &py);
  50
  51     for (i = 0; i < screen_num_monitors; ++i) {
  52         Rect *monitor = screen_physical_area_monitor(i);
  53         gboolean contain = RECT_CONTAINS(*monitor, px, py);
  54         g_free(monitor);
  55         if (contain)
  56             return screen_area(c->desktop, i, NULL);
  57     }
  58     g_assert_not_reached();
  59 }
  60
  61 /*! Pick a monitor to place a window on. */
  62 static Rect **pick_head(ObClient *c)
  63 {
  64     Rect **area;
  65     guint *choice;
  66     guint i;
  67     gint px, py;
  68     ObClient *p;
  69
  70     area = g_new(Rect*, screen_num_monitors);
  71     choice = g_new(guint, screen_num_monitors);
  72     for (i = 0; i < screen_num_monitors; ++i)
  73         choice[i] = screen_num_monitors; /* make them all invalid to start */
  74
  75     /* try direct parent first */
  76     if ((p = client_direct_parent(c))) {
  77         add_choice(choice, client_monitor(p));
  78         ob_debug("placement adding choice %d for parent\n",
  79                  client_monitor(p));
  80     }
  81
  82     /* more than one window in its group (more than just this window) */
  83     if (client_has_group_siblings(c)) {
  84         GSList *it;
  85
  86         /* try on the client's desktop */
  87         for (it = c->group->members; it; it = g_slist_next(it)) {
  88             ObClient *itc = it->data;
  89             if (itc != c &&
  90                 (itc->desktop == c->desktop ||
  91                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  92             {
  93                 add_choice(choice, client_monitor(it->data));
  94                 ob_debug("placement adding choice %d for group sibling\n",
  95                          client_monitor(it->data));
  96             }
  97         }
  98
  99         /* try on all desktops */
 100         for (it = c->group->members; it; it = g_slist_next(it)) {
 101             ObClient *itc = it->data;
 102             if (itc != c) {
 103                 add_choice(choice, client_monitor(it->data));
 104                 ob_debug("placement adding choice %d for group sibling on "
 105                          "another desktop\n", client_monitor(it->data));
 106             }
 107         }
 108     }
 109
 110     if (focus_client) {
 111         add_choice(choice, client_monitor(focus_client));
 112         ob_debug("placement adding choice %d for focused window\n",
 113                  client_monitor(focus_client));
 114     }
 115
 116     screen_pointer_pos(&px, &py);
 117
 118     for (i = 0; i < screen_num_monitors; i++) {
 119         Rect *monitor = screen_physical_area_monitor(i);
 120         gboolean contain = RECT_CONTAINS(*monitor, px, py);
 121         g_free(monitor);
 122         if (contain) {
 123             add_choice(choice, i);
 124             ob_debug("placement adding choice %d for mouse pointer\n", i);
 125             break;
 126         }
 127     }
 128
 129     /* add any leftover choices */
 130     for (i = 0; i < screen_num_monitors; ++i)
 131         add_choice(choice, i);
 132
 133     for (i = 0; i < screen_num_monitors; ++i)
 134         area[i] = screen_area(c->desktop, choice[i], NULL);
 135
 136     return area;
 137 }
 138
 139 static gboolean place_random(ObClient *client, gint *x, gint *y)
 140 {
 141     gint l, r, t, b;
 142     Rect **areas;
 143     guint i;
 144
 145     areas = pick_head(client);
 146     i = g_random_int_range(0, screen_num_monitors);
 147
 148     l = areas[i]->x;
 149     t = areas[i]->y;
 150     r = areas[i]->x + areas[i]->width - client->frame->area.width;
 151     b = areas[i]->y + areas[i]->height - client->frame->area.height;
 152
 153     if (r > l) *x = g_random_int_range(l, r + 1);
 154     else       *x = areas[i]->x;
 155     if (b > t) *y = g_random_int_range(t, b + 1);
 156     else       *y = areas[i]->y;
 157
 158     for (i = 0; i < screen_num_monitors; ++i)
 159         g_free(areas[i]);
 160     g_free(areas);
 161
 162     return TRUE;
 163 }
 164
 165 static GSList* area_add(GSList *list, Rect *a)
 166 {
 167     Rect *r = g_new(Rect, 1);
 168     *r = *a;
 169     return g_slist_prepend(list, r);
 170 }
 171
 172 static GSList* area_remove(GSList *list, Rect *a)
 173 {
 174     GSList *sit;
 175     GSList *result = NULL;
 176
 177     for (sit = list; sit; sit = g_slist_next(sit)) {
 178         Rect *r = sit->data;
 179
 180         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 181             result = g_slist_prepend(result, r);
 182             r = NULL; /* dont free it */
 183         } else {
 184             Rect isect, extra;
 185
 186             /* Use an intersection of a and r to determine the space
 187                around r that we can use.
 188
 189                NOTE: the spaces calculated can overlap.
 190             */
 191
 192             RECT_SET_INTERSECTION(isect, *r, *a);
 193
 194             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 195                 RECT_SET(extra, r->x, r->y,
 196                          RECT_LEFT(isect) - r->x, r->height);
 197                 result = area_add(result, &extra);
 198             }
 199
 200             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 201                 RECT_SET(extra, r->x, r->y,
 202                          r->width, RECT_TOP(isect) - r->y + 1);
 203                 result = area_add(result, &extra);
 204             }
 205
 206             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 207                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 208                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 209                 result = area_add(result, &extra);
 210             }
 211
 212             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 213                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 214                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 215                 result = area_add(result, &extra);
 216             }
 217         }
 218
 219         g_free(r);
 220     }
 221     g_slist_free(list);
 222     return result;
 223 }
 224
 225 enum {
 226     IGNORE_FULLSCREEN = 1,
 227     IGNORE_MAXIMIZED  = 2,
 228     IGNORE_MENUTOOL   = 3,
 229     /*IGNORE_SHADED     = 3,*/
 230     IGNORE_NONGROUP   = 4,
 231     IGNORE_BELOW      = 5,
 232     /*IGNORE_NONFOCUS   = 1 << 5,*/
 233     IGNORE_DOCK       = 6,
 234     IGNORE_END        = 7
 235 };
 236
 237 static gboolean place_nooverlap(ObClient *c, gint *x, gint *y)
 238 {
 239     Rect **areas;
 240     gint ignore;
 241     gboolean ret;
 242     gint maxsize;
 243     GSList *spaces = NULL, *sit, *maxit;
 244     guint i;
 245
 246     areas = pick_head(c);
 247     ret = FALSE;
 248     maxsize = 0;
 249     maxit = NULL;
 250
 251     /* try ignoring different things to find empty space */
 252     for (ignore = 0; ignore < IGNORE_END && !ret; ignore++) {
 253         guint i;
 254
 255         /* try all monitors in order of preference */
 256         for (i = 0; i < screen_num_monitors && !ret; ++i) {
 257             GList *it;
 258
 259             /* add the whole monitor */
 260             spaces = area_add(spaces, areas[i]);
 261
 262             /* go thru all the windows */
 263             for (it = client_list; it; it = g_list_next(it)) {
 264                 ObClient *test = it->data;
 265
 266                 /* should we ignore this client? */
 267                 if (screen_showing_desktop) continue;
 268                 if (c == test) continue;
 269                 if (test->iconic) continue;
 270                 if (c->desktop != DESKTOP_ALL) {
 271                     if (test->desktop != c->desktop &&
 272                         test->desktop != DESKTOP_ALL) continue;
 273                 } else {
 274                     if (test->desktop != screen_desktop &&
 275                         test->desktop != DESKTOP_ALL) continue;
 276                 }
 277                 if (test->type == OB_CLIENT_TYPE_SPLASH ||
 278                     test->type == OB_CLIENT_TYPE_DESKTOP) continue;
 279
 280
 281                 if ((ignore >= IGNORE_FULLSCREEN) &&
 282                     test->fullscreen) continue;
 283                 if ((ignore >= IGNORE_MAXIMIZED) &&
 284                     test->max_horz && test->max_vert) continue;
 285                 if ((ignore >= IGNORE_MENUTOOL) &&
 286                     (test->type == OB_CLIENT_TYPE_MENU ||
 287                      test->type == OB_CLIENT_TYPE_TOOLBAR) &&
 288                     client_has_parent(c)) continue;
 289                 /*
 290                 if ((ignore >= IGNORE_SHADED) &&
 291                     test->shaded) continue;
 292                 */
 293                 if ((ignore >= IGNORE_NONGROUP) &&
 294                     client_has_group_siblings(c) &&
 295                     test->group != c->group) continue;
 296                 if ((ignore >= IGNORE_BELOW) &&
 297                     test->layer < c->layer) continue;
 298                 /*
 299                 if ((ignore >= IGNORE_NONFOCUS) &&
 300                     focus_client != test) continue;
 301                 */
 302                 /* don't ignore this window, so remove it from the available
 303                    area */
 304                 spaces = area_remove(spaces, &test->frame->area);
 305             }
 306
 307             if (ignore < IGNORE_DOCK) {
 308                 Rect a;
 309                 dock_get_area(&a);
 310                 spaces = area_remove(spaces, &a);
 311             }
 312
 313             for (sit = spaces; sit; sit = g_slist_next(sit)) {
 314                 Rect *r = sit->data;
 315
 316                 if (r->width >= c->frame->area.width &&
 317                     r->height >= c->frame->area.height &&
 318                     r->width > maxsize)
 319                 {
 320                     maxsize = r->width;
 321                     maxit = sit;
 322                 }
 323             }
 324
 325             if (maxit) {
 326                 Rect *r = maxit->data;
 327
 328                 /* center it in the area */
 329                 *x = r->x;
 330                 *y = r->y;
 331                 if (config_place_center) {
 332                     *x += (r->width - c->frame->area.width) / 2;
 333                     *y += (r->height - c->frame->area.height) / 2;
 334                 }
 335                 ret = TRUE;
 336             }
 337
 338             while (spaces) {
 339                 g_free(spaces->data);
 340                 spaces = g_slist_delete_link(spaces, spaces);
 341             }
 342         }
 343     }
 344
 345     for (i = 0; i < screen_num_monitors; ++i)
 346         g_free(areas[i]);
 347     g_free(areas);
 348     return ret;
 349 }
 350
 351 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 352 {
 353     gint l, r, t, b;
 354     gint px, py;
 355     Rect *area;
 356
 357     if (!screen_pointer_pos(&px, &py))
 358         return FALSE;
 359     area = pick_pointer_head(client);
 360
 361     l = area->x;
 362     t = area->y;
 363     r = area->x + area->width - client->frame->area.width;
 364     b = area->y + area->height - client->frame->area.height;
 365
 366     *x = px - client->area.width / 2 - client->frame->size.left;
 367     *x = MIN(MAX(*x, l), r);
 368     *y = py - client->area.height / 2 - client->frame->size.top;
 369     *y = MIN(MAX(*y, t), b);
 370
 371     return TRUE;
 372 }
 373
 374 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 375                                       ObAppSettings *settings)
 376 {
 377     Rect *screen = NULL;
 378
 379     if (!settings || (settings && !settings->pos_given))
 380         return FALSE;
 381
 382     /* Find which head the pointer is on */
 383     if (settings->monitor == 0)
 384         screen = pick_pointer_head(client);
 385     else if (settings->monitor > 0 &&
 386              (guint)settings->monitor <= screen_num_monitors)
 387         screen = screen_area(client->desktop, (guint)settings->monitor - 1,
 388                              NULL);
 389     else {
 390         Rect **areas;
 391         guint i;
 392
 393         areas = pick_head(client);
 394         screen = areas[0];
 395
 396         for (i = 0; i < screen_num_monitors; ++i)
 397             g_free(areas[i]);
 398         g_free(areas);
 399     }
 400
 401     if (settings->center_x)
 402         *x = screen->x + screen->width / 2 - client->area.width / 2;
 403     else if (settings->opposite_x)
 404         *x = screen->x + screen->width - client->frame->area.width -
 405             settings->position.x;
 406     else
 407         *x = screen->x + settings->position.x;
 408
 409     if (settings->center_y)
 410         *y = screen->y + screen->height / 2 - client->area.height / 2;
 411     else if (settings->opposite_y)
 412         *y = screen->y + screen->height - client->frame->area.height -
 413             settings->position.y;
 414     else
 415         *y = screen->y + settings->position.y;
 416
 417     return TRUE;
 418 }
 419
 420 static gboolean place_transient_splash(ObClient *client, gint *x, gint *y)
 421 {
 422     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 423         GSList *it;
 424         gboolean first = TRUE;
 425         gint l, r, t, b;
 426         for (it = client->parents; it; it = g_slist_next(it)) {
 427             ObClient *m = it->data;
 428             if (!m->iconic) {
 429                 if (first) {
 430                     l = RECT_LEFT(m->frame->area);
 431                     t = RECT_TOP(m->frame->area);
 432                     r = RECT_RIGHT(m->frame->area);
 433                     b = RECT_BOTTOM(m->frame->area);
 434                     first = FALSE;
 435                 } else {
 436                     l = MIN(l, RECT_LEFT(m->frame->area));
 437                     t = MIN(t, RECT_TOP(m->frame->area));
 438                     r = MAX(r, RECT_RIGHT(m->frame->area));
 439                     b = MAX(b, RECT_BOTTOM(m->frame->area));
 440                 }
 441             }
 442             if (!first) {
 443                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 444                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 445                 return TRUE;
 446             }
 447         }
 448     }
 449
 450     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 451         client->type == OB_CLIENT_TYPE_SPLASH)
 452     {
 453         Rect **areas;
 454         guint i;
 455
 456         areas = pick_head(client);
 457
 458         *x = (areas[0]->width - client->frame->area.width) / 2 + areas[0]->x;
 459         *y = (areas[0]->height - client->frame->area.height) / 2 + areas[0]->y;
 460
 461         for (i = 0; i < screen_num_monitors; ++i)
 462             g_free(areas[i]);
 463         g_free(areas);
 464         return TRUE;
 465     }
 466
 467     return FALSE;
 468 }
 469
 470 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 471 gboolean place_client(ObClient *client, gint *x, gint *y,
 472                       ObAppSettings *settings)
 473 {
 474     gboolean ret;
 475
 476     /* per-app settings override program specified position
 477      * but not user specified */
 478     if ((client->positioned & USPosition) ||
 479         ((client->positioned & PPosition) && !(settings && settings->pos_given))
 480         )
 481         return FALSE;
 482
 483     /* try a number of methods */
 484     ret = place_transient_splash(client, x, y) ||
 485         place_per_app_setting(client, x, y, settings) ||
 486         (config_place_policy == OB_PLACE_POLICY_MOUSE &&
 487          place_under_mouse(client, x, y)) ||
 488         place_nooverlap(client, x, y) ||
 489         place_random(client, x, y);
 490     g_assert(ret);
 491
 492     /* get where the client should be */
 493     frame_frame_gravity(client->frame, x, y);
 494     return ret;
 495 }