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 Rect *pick_pointer_head(ObClient *c)
  32 {
  33     return screen_area(c->desktop, screen_monitor_pointer(), NULL);
  34 }
  35
  36 /* use the following priority lists for pick_head()
  37
  38    When a window is being placed in the FOREGROUND, use a monitor chosen in
  39    the following order:
  40    1. same monitor as parent
  41    2. primary monitor if placement=PRIMARY
  42       active monitor if placement=ACTIVE
  43       pointer monitor if placement=MOUSE
  44    3. primary monitor
  45    4. other monitors where the window has group members on the same desktop
  46    5. other monitors where the window has group members on other desktops
  47    6. other monitors
  48
  49    When a window is being placed in the BACKGROUND, use a monitor chosen in the
  50    following order:
  51    1. same monitor as parent
  52    2. other monitors where the window has group members on the same desktop
  53     2a. primary monitor in this set
  54     2b. other monitors in this set
  55    3. other monitors where the window has group members on other desktops
  56     3a. primary monitor in this set
  57     3b. other monitors in this set
  58    4. other monitors
  59     4a. primary monitor in this set
  60     4b. other monitors in this set
  61 */
  62
  63 /*! One for each possible head, used to sort them in order of precedence. */
  64 typedef struct {
  65     guint monitor;
  66     guint flags;
  67 } ObPlaceHead;
  68
  69 /*! Flags for ObPlaceHead */
  70 enum {
  71     HEAD_PARENT = 1 << 0, /* parent's monitor */
  72     HEAD_PLACED = 1 << 1, /* chosen monitor by placement */
  73     HEAD_PRIMARY = 1 << 2, /* primary monitor */
  74     HEAD_GROUP_DESK = 1 << 3, /* has a group member on the same desktop */
  75     HEAD_GROUP = 1 << 4, /* has a group member on another desktop */
  76 };
  77
  78 gint cmp_foreground(const void *a, const void *b)
  79 {
  80     const ObPlaceHead *h1 = a;
  81     const ObPlaceHead *h2 = b;
  82     gint i = 0;
  83
  84     if (h1->monitor == h2->monitor) return 0;
  85
  86     if (h1->flags & HEAD_PARENT) --i;
  87     if (h2->flags & HEAD_PARENT) ++i;
  88     if (i) return i;
  89
  90     if (h1->flags & HEAD_PLACED) --i;
  91     if (h2->flags & HEAD_PLACED) ++i;
  92     if (i) return i;
  93
  94     if (h1->flags & HEAD_PRIMARY) --i;
  95     if (h2->flags & HEAD_PRIMARY) ++i;
  96     if (i) return i;
  97
  98     if (h1->flags & HEAD_GROUP_DESK) --i;
  99     if (h2->flags & HEAD_GROUP_DESK) ++i;
 100     if (i) return i;
 101
 102     if (h1->flags & HEAD_GROUP) --i;
 103     if (h2->flags & HEAD_GROUP) ++i;
 104     if (i) return i;
 105
 106     return h1->monitor - h2->monitor;
 107 }
 108
 109 gint cmp_background(const void *a, const void *b)
 110 {
 111     const ObPlaceHead *h1 = a;
 112     const ObPlaceHead *h2 = b;
 113     gint i = 0;
 114
 115     if (h1->monitor == h2->monitor) return 0;
 116
 117     if (h1->flags & HEAD_PARENT) --i;
 118     if (h2->flags & HEAD_PARENT) ++i;
 119     if (i) return i;
 120
 121     if (h1->flags & HEAD_GROUP_DESK || h2->flags & HEAD_GROUP_DESK) {
 122         if (h1->flags & HEAD_GROUP_DESK) --i;
 123         if (h2->flags & HEAD_GROUP_DESK) ++i;
 124         if (i) return i;
 125         if (h1->flags & HEAD_PRIMARY) --i;
 126         if (h2->flags & HEAD_PRIMARY) ++i;
 127         if (i) return i;
 128     }
 129
 130     if (h1->flags & HEAD_GROUP || h2->flags & HEAD_GROUP) {
 131         if (h1->flags & HEAD_GROUP) --i;
 132         if (h2->flags & HEAD_GROUP) ++i;
 133         if (i) return i;
 134         if (h1->flags & HEAD_PRIMARY) --i;
 135         if (h2->flags & HEAD_PRIMARY) ++i;
 136         if (i) return i;
 137     }
 138
 139     if (h1->flags & HEAD_PRIMARY) --i;
 140     if (h2->flags & HEAD_PRIMARY) ++i;
 141     if (i) return i;
 142
 143     return h1->monitor - h2->monitor;
 144 }
 145
 146 /*! Pick a monitor to place a window on. */
 147 static Rect *pick_head(ObClient *c, gboolean foreground)
 148 {
 149     Rect *area;
 150     ObPlaceHead *choice;
 151     guint i;
 152     ObClient *p;
 153     GSList *it;
 154
 155     choice = g_new(ObPlaceHead, screen_num_monitors);
 156     for (i = 0; i < screen_num_monitors; ++i) {
 157         choice[i].monitor = i;
 158         choice[i].flags = 0;
 159     }
 160
 161     /* find monitors with group members */
 162     if (c->group) {
 163         for (it = c->group->members; it; it = g_slist_next(it)) {
 164             ObClient *itc = it->data;
 165             if (itc != c) {
 166                 guint m = client_monitor(itc);
 167
 168                 if (m < screen_num_monitors) {
 169                     if (screen_compare_desktops(itc->desktop, c->desktop))
 170                         choice[m].flags |= HEAD_GROUP_DESK;
 171                     else
 172                         choice[m].flags |= HEAD_GROUP;
 173                 }
 174             }
 175         }
 176     }
 177
 178     i = screen_monitor_primary(FALSE);
 179     if (i < screen_num_monitors) {
 180         choice[i].flags |= HEAD_PRIMARY;
 181         if (config_place_monitor == OB_PLACE_MONITOR_PRIMARY)
 182             choice[i].flags |= HEAD_PLACED;
 183     }
 184
 185     /* direct parent takes highest precedence */
 186     if ((p = client_direct_parent(c))) {
 187         i = client_monitor(p);
 188         if (i < screen_num_monitors)
 189             choice[i].flags |= HEAD_PARENT;
 190     }
 191
 192     qsort(choice, screen_num_monitors, sizeof(ObPlaceHead),
 193           foreground ? cmp_foreground : cmp_background);
 194
 195     /* save the areas of the monitors in order of their being chosen */
 196     for (i = 0; i < screen_num_monitors; ++i)
 197     {
 198         ob_debug("placement choice %d is monitor %d", i, choice[i].monitor);
 199         if (choice[i].flags & HEAD_PARENT)
 200             ob_debug("  - parent on monitor");
 201         if (choice[i].flags & HEAD_PLACED)
 202             ob_debug("  - placement choice");
 203         if (choice[i].flags & HEAD_PRIMARY)
 204             ob_debug("  - primary monitor");
 205         if (choice[i].flags & HEAD_GROUP_DESK)
 206             ob_debug("  - group on same desktop");
 207         if (choice[i].flags & HEAD_GROUP)
 208             ob_debug("  - group on other desktop");
 209     }
 210
 211     area = screen_area(c->desktop, choice[0].monitor, NULL);
 212
 213     g_free(choice);
 214
 215     /* return the area for the chosen monitor */
 216     return area;
 217 }
 218
 219 static gboolean place_random(ObClient *client, Rect *area, gint *x, gint *y)
 220 {
 221     gint l, r, t, b;
 222
 223     ob_debug("placing randomly");
 224
 225     l = area->x;
 226     t = area->y;
 227     r = area->x + area->width - client->frame->area.width;
 228     b = area->y + area->height - client->frame->area.height;
 229
 230     if (r > l) *x = g_random_int_range(l, r + 1);
 231     else       *x = area->x;
 232     if (b > t) *y = g_random_int_range(t, b + 1);
 233     else       *y = area->y;
 234
 235     return TRUE;
 236 }
 237
 238 static GSList* area_add(GSList *list, Rect *a)
 239 {
 240     Rect *r = g_slice_new(Rect);
 241     *r = *a;
 242     return g_slist_prepend(list, r);
 243 }
 244
 245 static GSList* area_remove(GSList *list, Rect *a)
 246 {
 247     GSList *sit;
 248     GSList *result = NULL;
 249
 250     for (sit = list; sit; sit = g_slist_next(sit)) {
 251         Rect *r = sit->data;
 252
 253         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 254             result = g_slist_prepend(result, r);
 255             /* dont free r, it's moved to the result list */
 256         } else {
 257             Rect isect, extra;
 258
 259             /* Use an intersection of a and r to determine the space
 260                around r that we can use.
 261
 262                NOTE: the spaces calculated can overlap.
 263             */
 264
 265             RECT_SET_INTERSECTION(isect, *r, *a);
 266
 267             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 268                 RECT_SET(extra, r->x, r->y,
 269                          RECT_LEFT(isect) - r->x, r->height);
 270                 result = area_add(result, &extra);
 271             }
 272
 273             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 274                 RECT_SET(extra, r->x, r->y,
 275                          r->width, RECT_TOP(isect) - r->y + 1);
 276                 result = area_add(result, &extra);
 277             }
 278
 279             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 280                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 281                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 282                 result = area_add(result, &extra);
 283             }
 284
 285             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 286                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 287                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 288                 result = area_add(result, &extra);
 289             }
 290
 291             /* 'r' is not being added to the result list, so free it */
 292             g_slice_free(Rect, r);
 293         }
 294     }
 295     g_slist_free(list);
 296     return result;
 297 }
 298
 299 enum {
 300     IGNORE_FULLSCREEN = 1,
 301     IGNORE_MAXIMIZED  = 2,
 302     IGNORE_MENUTOOL   = 3,
 303     /*IGNORE_SHADED     = 3,*/
 304     IGNORE_NONGROUP   = 4,
 305     IGNORE_BELOW      = 5,
 306     /*IGNORE_NONFOCUS   = 1 << 5,*/
 307     IGNORE_DOCK       = 6,
 308     IGNORE_END        = 7
 309 };
 310
 311 static gboolean place_nooverlap(ObClient *c, Rect *area, gint *x, gint *y)
 312 {
 313     gint ignore;
 314     gboolean ret;
 315     gint maxsize;
 316     GSList *spaces = NULL, *sit, *maxit;
 317
 318     ob_debug("placing nonoverlap");
 319
 320     ret = FALSE;
 321     maxsize = 0;
 322     maxit = NULL;
 323
 324     /* try ignoring different things to find empty space */
 325     for (ignore = 0; ignore < IGNORE_END && !ret; ignore++) {
 326         GList *it;
 327
 328         /* add the whole monitor */
 329         spaces = area_add(spaces, area);
 330
 331         /* go thru all the windows */
 332         for (it = client_list; it; it = g_list_next(it)) {
 333             ObClient *test = it->data;
 334
 335             /* should we ignore this client? */
 336             if (screen_showing_desktop) continue;
 337             if (c == test) continue;
 338             if (test->iconic) continue;
 339             if (c->desktop != DESKTOP_ALL) {
 340                 if (test->desktop != c->desktop &&
 341                     test->desktop != DESKTOP_ALL) continue;
 342             } else {
 343                 if (test->desktop != screen_desktop &&
 344                     test->desktop != DESKTOP_ALL) continue;
 345             }
 346             if (test->type == OB_CLIENT_TYPE_SPLASH ||
 347                 test->type == OB_CLIENT_TYPE_DESKTOP) continue;
 348
 349
 350             if ((ignore >= IGNORE_FULLSCREEN) &&
 351                 test->fullscreen) continue;
 352             if ((ignore >= IGNORE_MAXIMIZED) &&
 353                 test->max_horz && test->max_vert) continue;
 354             if ((ignore >= IGNORE_MENUTOOL) &&
 355                 (test->type == OB_CLIENT_TYPE_MENU ||
 356                  test->type == OB_CLIENT_TYPE_TOOLBAR) &&
 357                 client_has_parent(c)) continue;
 358             /*
 359               if ((ignore >= IGNORE_SHADED) &&
 360               test->shaded) continue;
 361             */
 362             if ((ignore >= IGNORE_NONGROUP) &&
 363                 client_has_group_siblings(c) &&
 364                 test->group != c->group) continue;
 365             if ((ignore >= IGNORE_BELOW) &&
 366                 test->layer < c->layer) continue;
 367             /*
 368               if ((ignore >= IGNORE_NONFOCUS) &&
 369               focus_client != test) continue;
 370             */
 371             /* don't ignore this window, so remove it from the available
 372                area */
 373             spaces = area_remove(spaces, &test->frame->area);
 374         }
 375
 376         if (ignore < IGNORE_DOCK) {
 377             Rect a;
 378             dock_get_area(&a);
 379             spaces = area_remove(spaces, &a);
 380         }
 381
 382         for (sit = spaces; sit; sit = g_slist_next(sit)) {
 383             Rect *r = sit->data;
 384
 385             if (r->width >= c->frame->area.width &&
 386                 r->height >= c->frame->area.height &&
 387                 r->width * r->height > maxsize)
 388             {
 389                 maxsize = r->width * r->height;
 390                 maxit = sit;
 391             }
 392         }
 393
 394         if (maxit) {
 395             Rect *r = maxit->data;
 396
 397             /* center it in the area */
 398             *x = r->x;
 399             *y = r->y;
 400             if (config_place_center) {
 401                 *x += (r->width - c->frame->area.width) / 2;
 402                 *y += (r->height - c->frame->area.height) / 2;
 403             }
 404             ret = TRUE;
 405         }
 406
 407         while (spaces) {
 408             g_slice_free(Rect, spaces->data);
 409             spaces = g_slist_delete_link(spaces, spaces);
 410         }
 411     }
 412
 413     return ret;
 414 }
 415
 416 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 417 {
 418     gint l, r, t, b;
 419     gint px, py;
 420     Rect *area;
 421
 422     ob_debug("placing under mouse");
 423
 424     if (!screen_pointer_pos(&px, &py))
 425         return FALSE;
 426     area = pick_pointer_head(client);
 427
 428     l = area->x;
 429     t = area->y;
 430     r = area->x + area->width - client->frame->area.width;
 431     b = area->y + area->height - client->frame->area.height;
 432
 433     *x = px - client->area.width / 2 - client->frame->size.left;
 434     *x = MIN(MAX(*x, l), r);
 435     *y = py - client->area.height / 2 - client->frame->size.top;
 436     *y = MIN(MAX(*y, t), b);
 437
 438     g_slice_free(Rect, area);
 439
 440     return TRUE;
 441 }
 442
 443 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 444                                       ObAppSettings *settings)
 445 {
 446     Rect *screen = NULL;
 447
 448     if (!settings || (settings && !settings->pos_given))
 449         return FALSE;
 450
 451     ob_debug("placing by per-app settings");
 452
 453     /* Find which head the pointer is on */
 454     if (settings->monitor == 0)
 455         /* this can return NULL */
 456         screen = pick_pointer_head(client);
 457     else {
 458         guint m = settings->monitor;
 459         if (m < 1 || m > screen_num_monitors)
 460             m = screen_monitor_primary(TRUE) + 1;
 461         screen = screen_area(client->desktop, m - 1, NULL);
 462     }
 463
 464     if (settings->position.x.center)
 465         *x = screen->x + screen->width / 2 - client->area.width / 2;
 466     else if (settings->position.x.opposite)
 467         *x = screen->x + screen->width - client->frame->area.width -
 468             settings->position.x.pos;
 469     else
 470         *x = screen->x + settings->position.x.pos;
 471     if (settings->position.x.denom)
 472         *x = (*x * screen->width) / settings->position.x.denom;
 473
 474     if (settings->position.y.center)
 475         *y = screen->y + screen->height / 2 - client->area.height / 2;
 476     else if (settings->position.y.opposite)
 477         *y = screen->y + screen->height - client->frame->area.height -
 478             settings->position.y.pos;
 479     else
 480         *y = screen->y + settings->position.y.pos;
 481     if (settings->position.y.denom)
 482         *y = (*y * screen->height) / settings->position.y.denom;
 483
 484     g_slice_free(Rect, screen);
 485     return TRUE;
 486 }
 487
 488 static gboolean place_transient_splash(ObClient *client, Rect *area,
 489                                        gint *x, gint *y)
 490 {
 491     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 492         GSList *it;
 493         gboolean first = TRUE;
 494         gint l, r, t, b;
 495
 496         ob_debug("placing dialog");
 497
 498         for (it = client->parents; it; it = g_slist_next(it)) {
 499             ObClient *m = it->data;
 500             if (!m->iconic) {
 501                 if (first) {
 502                     l = RECT_LEFT(m->frame->area);
 503                     t = RECT_TOP(m->frame->area);
 504                     r = RECT_RIGHT(m->frame->area);
 505                     b = RECT_BOTTOM(m->frame->area);
 506                     first = FALSE;
 507                 } else {
 508                     l = MIN(l, RECT_LEFT(m->frame->area));
 509                     t = MIN(t, RECT_TOP(m->frame->area));
 510                     r = MAX(r, RECT_RIGHT(m->frame->area));
 511                     b = MAX(b, RECT_BOTTOM(m->frame->area));
 512                 }
 513             }
 514             if (!first) {
 515                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 516                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 517                 return TRUE;
 518             }
 519         }
 520     }
 521
 522     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 523         client->type == OB_CLIENT_TYPE_SPLASH)
 524     {
 525         ob_debug("placing dialog or splash");
 526
 527         *x = (area->width - client->frame->area.width) / 2 + area->x;
 528         *y = (area->height - client->frame->area.height) / 2 + area->y;
 529         return TRUE;
 530     }
 531
 532     return FALSE;
 533 }
 534
 535 /*! Return TRUE if openbox chose the position for the window, and FALSE if
 536   the application chose it */
 537 gboolean place_client(ObClient *client, gboolean foreground, gint *x, gint *y,
 538                       ObAppSettings *settings)
 539 {
 540     Rect *area;
 541     gboolean ret;
 542
 543     /* per-app settings override program specified position
 544      * but not user specified, unless pos_force is enabled */
 545     if (((client->positioned & USPosition) &&
 546          !(settings && settings->pos_given && settings->pos_force)) ||
 547         ((client->positioned & PPosition) &&
 548          !(settings && settings->pos_given)))
 549         return FALSE;
 550
 551     area = pick_head(client, foreground);
 552
 553     /* try a number of methods */
 554     ret = place_per_app_setting(client, x, y, settings) ||
 555         place_transient_splash(client, area, x, y) ||
 556         (config_place_policy == OB_PLACE_POLICY_MOUSE &&
 557          place_under_mouse(client, x, y)) ||
 558         place_nooverlap(client, area, x, y) ||
 559         place_random(client, area, x, y);
 560     g_assert(ret);
 561
 562     g_slice_free(Rect, area);
 563
 564     /* get where the client should be */
 565     frame_frame_gravity(client->frame, x, y);
 566     return TRUE;
 567 }