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     if (screen_pointer_pos(&px, &py)) {
  50         for (i = 0; i < screen_num_monitors; ++i) {
  51             Rect *monitor = screen_physical_area_monitor(i);
  52             gboolean contain = RECT_CONTAINS(*monitor, px, py);
  53             g_free(monitor);
  54             if (contain)
  55                 return screen_area(c->desktop, i, NULL);
  56         }
  57         g_assert_not_reached();
  58     } else
  59         return NULL;
  60 }
  61
  62 /*! Pick a monitor to place a window on. */
  63 static Rect **pick_head(ObClient *c)
  64 {
  65     Rect **area;
  66     guint *choice;
  67     guint i;
  68     gint px, py;
  69     ObClient *p;
  70
  71     area = g_new(Rect*, screen_num_monitors);
  72     choice = g_new(guint, screen_num_monitors);
  73     for (i = 0; i < screen_num_monitors; ++i)
  74         choice[i] = screen_num_monitors; /* make them all invalid to start */
  75
  76     /* try direct parent first */
  77     if ((p = client_direct_parent(c))) {
  78         add_choice(choice, client_monitor(p));
  79         ob_debug("placement adding choice %d for parent\n",
  80                  client_monitor(p));
  81     }
  82
  83     /* more than one window in its group (more than just this window) */
  84     if (client_has_group_siblings(c)) {
  85         GSList *it;
  86
  87         /* try on the client's desktop */
  88         for (it = c->group->members; it; it = g_slist_next(it)) {
  89             ObClient *itc = it->data;
  90             if (itc != c &&
  91                 (itc->desktop == c->desktop ||
  92                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  93             {
  94                 add_choice(choice, client_monitor(it->data));
  95                 ob_debug("placement adding choice %d for group sibling\n",
  96                          client_monitor(it->data));
  97             }
  98         }
  99
 100         /* try on all desktops */
 101         for (it = c->group->members; it; it = g_slist_next(it)) {
 102             ObClient *itc = it->data;
 103             if (itc != c) {
 104                 add_choice(choice, client_monitor(it->data));
 105                 ob_debug("placement adding choice %d for group sibling on "
 106                          "another desktop\n", client_monitor(it->data));
 107             }
 108         }
 109     }
 110
 111     if (focus_client) {
 112         add_choice(choice, client_monitor(focus_client));
 113         ob_debug("placement adding choice %d for focused window\n",
 114                  client_monitor(focus_client));
 115     }
 116
 117     screen_pointer_pos(&px, &py);
 118
 119     for (i = 0; i < screen_num_monitors; i++) {
 120         Rect *monitor = screen_physical_area_monitor(i);
 121         gboolean contain = RECT_CONTAINS(*monitor, px, py);
 122         g_free(monitor);
 123         if (contain) {
 124             add_choice(choice, i);
 125             ob_debug("placement adding choice %d for mouse pointer\n", i);
 126             break;
 127         }
 128     }
 129
 130     /* add any leftover choices */
 131     for (i = 0; i < screen_num_monitors; ++i)
 132         add_choice(choice, i);
 133
 134     for (i = 0; i < screen_num_monitors; ++i)
 135         area[i] = screen_area(c->desktop, choice[i], NULL);
 136
 137     return area;
 138 }
 139
 140 static gboolean place_random(ObClient *client, gint *x, gint *y)
 141 {
 142     gint l, r, t, b;
 143     Rect **areas;
 144     guint i;
 145
 146     areas = pick_head(client);
 147     i = g_random_int_range(0, screen_num_monitors);
 148
 149     l = areas[i]->x;
 150     t = areas[i]->y;
 151     r = areas[i]->x + areas[i]->width - client->frame->area.width;
 152     b = areas[i]->y + areas[i]->height - client->frame->area.height;
 153
 154     if (r > l) *x = g_random_int_range(l, r + 1);
 155     else       *x = areas[i]->x;
 156     if (b > t) *y = g_random_int_range(t, b + 1);
 157     else       *y = areas[i]->y;
 158
 159     for (i = 0; i < screen_num_monitors; ++i)
 160         g_free(areas[i]);
 161     g_free(areas);
 162
 163     return TRUE;
 164 }
 165
 166 static GSList* area_add(GSList *list, Rect *a)
 167 {
 168     Rect *r = g_new(Rect, 1);
 169     *r = *a;
 170     return g_slist_prepend(list, r);
 171 }
 172
 173 static GSList* area_remove(GSList *list, Rect *a)
 174 {
 175     GSList *sit;
 176     GSList *result = NULL;
 177
 178     for (sit = list; sit; sit = g_slist_next(sit)) {
 179         Rect *r = sit->data;
 180
 181         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 182             result = g_slist_prepend(result, r);
 183             r = NULL; /* dont free it */
 184         } else {
 185             Rect isect, extra;
 186
 187             /* Use an intersection of a and r to determine the space
 188                around r that we can use.
 189
 190                NOTE: the spaces calculated can overlap.
 191             */
 192
 193             RECT_SET_INTERSECTION(isect, *r, *a);
 194
 195             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 196                 RECT_SET(extra, r->x, r->y,
 197                          RECT_LEFT(isect) - r->x, r->height);
 198                 result = area_add(result, &extra);
 199             }
 200
 201             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 202                 RECT_SET(extra, r->x, r->y,
 203                          r->width, RECT_TOP(isect) - r->y + 1);
 204                 result = area_add(result, &extra);
 205             }
 206
 207             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 208                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 209                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 210                 result = area_add(result, &extra);
 211             }
 212
 213             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 214                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 215                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 216                 result = area_add(result, &extra);
 217             }
 218         }
 219
 220         g_free(r);
 221     }
 222     g_slist_free(list);
 223     return result;
 224 }
 225
 226 enum {
 227     IGNORE_FULLSCREEN = 1,
 228     IGNORE_MAXIMIZED  = 2,
 229     IGNORE_MENUTOOL   = 3,
 230     /*IGNORE_SHADED     = 3,*/
 231     IGNORE_NONGROUP   = 4,
 232     IGNORE_BELOW      = 5,
 233     /*IGNORE_NONFOCUS   = 1 << 5,*/
 234     IGNORE_DOCK       = 6,
 235     IGNORE_END        = 7
 236 };
 237
 238 static gboolean place_nooverlap(ObClient *c, gint *x, gint *y)
 239 {
 240     Rect **areas;
 241     gint ignore;
 242     gboolean ret;
 243     gint maxsize;
 244     GSList *spaces = NULL, *sit, *maxit;
 245     guint i;
 246
 247     areas = pick_head(c);
 248     ret = FALSE;
 249     maxsize = 0;
 250     maxit = NULL;
 251
 252     /* try ignoring different things to find empty space */
 253     for (ignore = 0; ignore < IGNORE_END && !ret; ignore++) {
 254         guint i;
 255
 256         /* try all monitors in order of preference */
 257         for (i = 0; i < screen_num_monitors && !ret; ++i) {
 258             GList *it;
 259
 260             /* add the whole monitor */
 261             spaces = area_add(spaces, areas[i]);
 262
 263             /* go thru all the windows */
 264             for (it = client_list; it; it = g_list_next(it)) {
 265                 ObClient *test = it->data;
 266
 267                 /* should we ignore this client? */
 268                 if (screen_showing_desktop) continue;
 269                 if (c == test) continue;
 270                 if (test->iconic) continue;
 271                 if (c->desktop != DESKTOP_ALL) {
 272                     if (test->desktop != c->desktop &&
 273                         test->desktop != DESKTOP_ALL) continue;
 274                 } else {
 275                     if (test->desktop != screen_desktop &&
 276                         test->desktop != DESKTOP_ALL) continue;
 277                 }
 278                 if (test->type == OB_CLIENT_TYPE_SPLASH ||
 279                     test->type == OB_CLIENT_TYPE_DESKTOP) continue;
 280
 281
 282                 if ((ignore >= IGNORE_FULLSCREEN) &&
 283                     test->fullscreen) continue;
 284                 if ((ignore >= IGNORE_MAXIMIZED) &&
 285                     test->max_horz && test->max_vert) continue;
 286                 if ((ignore >= IGNORE_MENUTOOL) &&
 287                     (test->type == OB_CLIENT_TYPE_MENU ||
 288                      test->type == OB_CLIENT_TYPE_TOOLBAR) &&
 289                     client_has_parent(c)) continue;
 290                 /*
 291                 if ((ignore >= IGNORE_SHADED) &&
 292                     test->shaded) continue;
 293                 */
 294                 if ((ignore >= IGNORE_NONGROUP) &&
 295                     client_has_group_siblings(c) &&
 296                     test->group != c->group) continue;
 297                 if ((ignore >= IGNORE_BELOW) &&
 298                     test->layer < c->layer) continue;
 299                 /*
 300                 if ((ignore >= IGNORE_NONFOCUS) &&
 301                     focus_client != test) continue;
 302                 */
 303                 /* don't ignore this window, so remove it from the available
 304                    area */
 305                 spaces = area_remove(spaces, &test->frame->area);
 306             }
 307
 308             if (ignore < IGNORE_DOCK) {
 309                 Rect a;
 310                 dock_get_area(&a);
 311                 spaces = area_remove(spaces, &a);
 312             }
 313
 314             for (sit = spaces; sit; sit = g_slist_next(sit)) {
 315                 Rect *r = sit->data;
 316
 317                 if (r->width >= c->frame->area.width &&
 318                     r->height >= c->frame->area.height &&
 319                     r->width > maxsize)
 320                 {
 321                     maxsize = r->width;
 322                     maxit = sit;
 323                 }
 324             }
 325
 326             if (maxit) {
 327                 Rect *r = maxit->data;
 328
 329                 /* center it in the area */
 330                 *x = r->x;
 331                 *y = r->y;
 332                 if (config_place_center) {
 333                     *x += (r->width - c->frame->area.width) / 2;
 334                     *y += (r->height - c->frame->area.height) / 2;
 335                 }
 336                 ret = TRUE;
 337             }
 338
 339             while (spaces) {
 340                 g_free(spaces->data);
 341                 spaces = g_slist_delete_link(spaces, spaces);
 342             }
 343         }
 344     }
 345
 346     for (i = 0; i < screen_num_monitors; ++i)
 347         g_free(areas[i]);
 348     g_free(areas);
 349     return ret;
 350 }
 351
 352 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 353 {
 354     gint l, r, t, b;
 355     gint px, py;
 356     Rect *area;
 357
 358     if (!screen_pointer_pos(&px, &py))
 359         return FALSE;
 360     area = pick_pointer_head(client);
 361
 362     l = area->x;
 363     t = area->y;
 364     r = area->x + area->width - client->frame->area.width;
 365     b = area->y + area->height - client->frame->area.height;
 366
 367     *x = px - client->area.width / 2 - client->frame->size.left;
 368     *x = MIN(MAX(*x, l), r);
 369     *y = py - client->area.height / 2 - client->frame->size.top;
 370     *y = MIN(MAX(*y, t), b);
 371
 372     return TRUE;
 373 }
 374
 375 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 376                                       ObAppSettings *settings)
 377 {
 378     Rect *screen = NULL;
 379
 380     if (!settings || (settings && !settings->pos_given))
 381         return FALSE;
 382
 383     /* Find which head the pointer is on */
 384     if (settings->monitor == 0)
 385         /* this can return NULL */
 386         screen = pick_pointer_head(client);
 387     else if (settings->monitor > 0 &&
 388              (guint)settings->monitor <= screen_num_monitors)
 389         screen = screen_area(client->desktop, (guint)settings->monitor - 1,
 390                              NULL);
 391
 392     /* if we have't found a screen yet.. */
 393     if (!screen) {
 394         Rect **areas;
 395         guint i;
 396
 397         areas = pick_head(client);
 398         screen = areas[0];
 399
 400         /* don't free the first one, it's being set as "screen" */
 401         for (i = 1; i < screen_num_monitors; ++i)
 402             g_free(areas[i]);
 403         g_free(areas);
 404     }
 405
 406     if (settings->center_x)
 407         *x = screen->x + screen->width / 2 - client->area.width / 2;
 408     else if (settings->opposite_x)
 409         *x = screen->x + screen->width - client->frame->area.width -
 410             settings->position.x;
 411     else
 412         *x = screen->x + settings->position.x;
 413
 414     if (settings->center_y)
 415         *y = screen->y + screen->height / 2 - client->area.height / 2;
 416     else if (settings->opposite_y)
 417         *y = screen->y + screen->height - client->frame->area.height -
 418             settings->position.y;
 419     else
 420         *y = screen->y + settings->position.y;
 421
 422     g_free(screen);
 423     return TRUE;
 424 }
 425
 426 static gboolean place_transient_splash(ObClient *client, gint *x, gint *y)
 427 {
 428     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 429         GSList *it;
 430         gboolean first = TRUE;
 431         gint l, r, t, b;
 432         for (it = client->parents; it; it = g_slist_next(it)) {
 433             ObClient *m = it->data;
 434             if (!m->iconic) {
 435                 if (first) {
 436                     l = RECT_LEFT(m->frame->area);
 437                     t = RECT_TOP(m->frame->area);
 438                     r = RECT_RIGHT(m->frame->area);
 439                     b = RECT_BOTTOM(m->frame->area);
 440                     first = FALSE;
 441                 } else {
 442                     l = MIN(l, RECT_LEFT(m->frame->area));
 443                     t = MIN(t, RECT_TOP(m->frame->area));
 444                     r = MAX(r, RECT_RIGHT(m->frame->area));
 445                     b = MAX(b, RECT_BOTTOM(m->frame->area));
 446                 }
 447             }
 448             if (!first) {
 449                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 450                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 451                 return TRUE;
 452             }
 453         }
 454     }
 455
 456     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 457         client->type == OB_CLIENT_TYPE_SPLASH)
 458     {
 459         Rect **areas;
 460         guint i;
 461
 462         areas = pick_head(client);
 463
 464         *x = (areas[0]->width - client->frame->area.width) / 2 + areas[0]->x;
 465         *y = (areas[0]->height - client->frame->area.height) / 2 + areas[0]->y;
 466
 467         for (i = 0; i < screen_num_monitors; ++i)
 468             g_free(areas[i]);
 469         g_free(areas);
 470         return TRUE;
 471     }
 472
 473     return FALSE;
 474 }
 475
 476 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 477 gboolean place_client(ObClient *client, gint *x, gint *y,
 478                       ObAppSettings *settings)
 479 {
 480     gboolean ret;
 481     gboolean userplaced = FALSE;
 482
 483     /* per-app settings override program specified position
 484      * but not user specified */
 485     if ((client->positioned & USPosition) ||
 486         ((client->positioned & PPosition) &&
 487          !(settings && settings->pos_given)))
 488         return FALSE;
 489
 490     /* try a number of methods */
 491     ret = place_transient_splash(client, x, y) ||
 492         (userplaced = place_per_app_setting(client, x, y, settings)) ||
 493         (config_place_policy == OB_PLACE_POLICY_MOUSE &&
 494          place_under_mouse(client, x, y)) ||
 495         place_nooverlap(client, x, y) ||
 496         place_random(client, x, y);
 497     g_assert(ret);
 498
 499     /* get where the client should be */
 500     frame_frame_gravity(client->frame, x, y);
 501     return !userplaced;
 502 }