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",
  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",
  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", client_monitor(it->data));
 107             }
 108         }
 109     }
 110
 111     /* skip this if placing by the mouse position */
 112     if (focus_client && client_normal(focus_client) &&
 113         config_place_monitor != OB_PLACE_MONITOR_MOUSE)
 114     {
 115         add_choice(choice, client_monitor(focus_client));
 116         ob_debug("placement adding choice %d for normal focused window",
 117                  client_monitor(focus_client));
 118     }
 119
 120     screen_pointer_pos(&px, &py);
 121
 122     for (i = 0; i < screen_num_monitors; i++) {
 123         Rect *monitor = screen_physical_area_monitor(i);
 124         gboolean contain = RECT_CONTAINS(*monitor, px, py);
 125         g_free(monitor);
 126         if (contain) {
 127             add_choice(choice, i);
 128             ob_debug("placement adding choice %d for mouse pointer", i);
 129             break;
 130         }
 131     }
 132
 133     /* add any leftover choices */
 134     for (i = 0; i < screen_num_monitors; ++i)
 135         add_choice(choice, i);
 136
 137     for (i = 0; i < screen_num_monitors; ++i)
 138         area[i] = screen_area(c->desktop, choice[i], NULL);
 139
 140     g_free(choice);
 141
 142     return area;
 143 }
 144
 145 static gboolean place_random(ObClient *client, gint *x, gint *y)
 146 {
 147     gint l, r, t, b;
 148     Rect **areas;
 149     guint i;
 150
 151     areas = pick_head(client);
 152     i = (config_place_monitor != OB_PLACE_MONITOR_ANY) ?
 153         0 : g_random_int_range(0, screen_num_monitors);
 154
 155     l = areas[i]->x;
 156     t = areas[i]->y;
 157     r = areas[i]->x + areas[i]->width - client->frame->area.width;
 158     b = areas[i]->y + areas[i]->height - client->frame->area.height;
 159
 160     if (r > l) *x = g_random_int_range(l, r + 1);
 161     else       *x = areas[i]->x;
 162     if (b > t) *y = g_random_int_range(t, b + 1);
 163     else       *y = areas[i]->y;
 164
 165     for (i = 0; i < screen_num_monitors; ++i)
 166         g_free(areas[i]);
 167     g_free(areas);
 168
 169     return TRUE;
 170 }
 171
 172 static GSList* area_add(GSList *list, Rect *a)
 173 {
 174     Rect *r = g_new(Rect, 1);
 175     *r = *a;
 176     return g_slist_prepend(list, r);
 177 }
 178
 179 static GSList* area_remove(GSList *list, Rect *a)
 180 {
 181     GSList *sit;
 182     GSList *result = NULL;
 183
 184     for (sit = list; sit; sit = g_slist_next(sit)) {
 185         Rect *r = sit->data;
 186
 187         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 188             result = g_slist_prepend(result, r);
 189             /* dont free r, it's moved to the result list */
 190         } else {
 191             Rect isect, extra;
 192
 193             /* Use an intersection of a and r to determine the space
 194                around r that we can use.
 195
 196                NOTE: the spaces calculated can overlap.
 197             */
 198
 199             RECT_SET_INTERSECTION(isect, *r, *a);
 200
 201             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 202                 RECT_SET(extra, r->x, r->y,
 203                          RECT_LEFT(isect) - r->x, r->height);
 204                 result = area_add(result, &extra);
 205             }
 206
 207             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 208                 RECT_SET(extra, r->x, r->y,
 209                          r->width, RECT_TOP(isect) - r->y + 1);
 210                 result = area_add(result, &extra);
 211             }
 212
 213             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 214                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 215                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 216                 result = area_add(result, &extra);
 217             }
 218
 219             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 220                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 221                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 222                 result = area_add(result, &extra);
 223             }
 224
 225             /* 'r' is not being added to the result list, so free it */
 226             g_free(r);
 227         }
 228     }
 229     g_slist_free(list);
 230     return result;
 231 }
 232
 233 enum {
 234     IGNORE_FULLSCREEN = 1,
 235     IGNORE_MAXIMIZED  = 2,
 236     IGNORE_MENUTOOL   = 3,
 237     /*IGNORE_SHADED     = 3,*/
 238     IGNORE_NONGROUP   = 4,
 239     IGNORE_BELOW      = 5,
 240     /*IGNORE_NONFOCUS   = 1 << 5,*/
 241     IGNORE_DOCK       = 6,
 242     IGNORE_END        = 7
 243 };
 244
 245 static gboolean place_nooverlap(ObClient *c, gint *x, gint *y)
 246 {
 247     Rect **areas;
 248     gint ignore;
 249     gboolean ret;
 250     gint maxsize;
 251     GSList *spaces = NULL, *sit, *maxit;
 252     guint i;
 253
 254     areas = pick_head(c);
 255     ret = FALSE;
 256     maxsize = 0;
 257     maxit = NULL;
 258
 259     /* try ignoring different things to find empty space */
 260     for (ignore = 0; ignore < IGNORE_END && !ret; ignore++) {
 261         /* try all monitors in order of preference, but only the first one
 262            if config_place_monitor is MOUSE or ACTIVE */
 263         for (i = 0; (i < (config_place_monitor != OB_PLACE_MONITOR_ANY ?
 264                           1 : screen_num_monitors) && !ret); ++i)
 265         {
 266             GList *it;
 267
 268             /* add the whole monitor */
 269             spaces = area_add(spaces, areas[i]);
 270
 271             /* go thru all the windows */
 272             for (it = client_list; it; it = g_list_next(it)) {
 273                 ObClient *test = it->data;
 274
 275                 /* should we ignore this client? */
 276                 if (screen_showing_desktop) continue;
 277                 if (c == test) continue;
 278                 if (test->iconic) continue;
 279                 if (c->desktop != DESKTOP_ALL) {
 280                     if (test->desktop != c->desktop &&
 281                         test->desktop != DESKTOP_ALL) continue;
 282                 } else {
 283                     if (test->desktop != screen_desktop &&
 284                         test->desktop != DESKTOP_ALL) continue;
 285                 }
 286                 if (test->type == OB_CLIENT_TYPE_SPLASH ||
 287                     test->type == OB_CLIENT_TYPE_DESKTOP) continue;
 288
 289
 290                 if ((ignore >= IGNORE_FULLSCREEN) &&
 291                     test->fullscreen) continue;
 292                 if ((ignore >= IGNORE_MAXIMIZED) &&
 293                     test->max_horz && test->max_vert) continue;
 294                 if ((ignore >= IGNORE_MENUTOOL) &&
 295                     (test->type == OB_CLIENT_TYPE_MENU ||
 296                      test->type == OB_CLIENT_TYPE_TOOLBAR) &&
 297                     client_has_parent(c)) continue;
 298                 /*
 299                 if ((ignore >= IGNORE_SHADED) &&
 300                     test->shaded) continue;
 301                 */
 302                 if ((ignore >= IGNORE_NONGROUP) &&
 303                     client_has_group_siblings(c) &&
 304                     test->group != c->group) continue;
 305                 if ((ignore >= IGNORE_BELOW) &&
 306                     test->layer < c->layer) continue;
 307                 /*
 308                 if ((ignore >= IGNORE_NONFOCUS) &&
 309                     focus_client != test) continue;
 310                 */
 311                 /* don't ignore this window, so remove it from the available
 312                    area */
 313                 spaces = area_remove(spaces, &test->frame->area);
 314             }
 315
 316             if (ignore < IGNORE_DOCK) {
 317                 Rect a;
 318                 dock_get_area(&a);
 319                 spaces = area_remove(spaces, &a);
 320             }
 321
 322             for (sit = spaces; sit; sit = g_slist_next(sit)) {
 323                 Rect *r = sit->data;
 324
 325                 if (r->width >= c->frame->area.width &&
 326                     r->height >= c->frame->area.height &&
 327                     r->width * r->height > maxsize)
 328                 {
 329                     maxsize = r->width * r->height;
 330                     maxit = sit;
 331                 }
 332             }
 333
 334             if (maxit) {
 335                 Rect *r = maxit->data;
 336
 337                 /* center it in the area */
 338                 *x = r->x;
 339                 *y = r->y;
 340                 if (config_place_center) {
 341                     *x += (r->width - c->frame->area.width) / 2;
 342                     *y += (r->height - c->frame->area.height) / 2;
 343                 }
 344                 ret = TRUE;
 345             }
 346
 347             while (spaces) {
 348                 g_free(spaces->data);
 349                 spaces = g_slist_delete_link(spaces, spaces);
 350             }
 351         }
 352     }
 353
 354     for (i = 0; i < screen_num_monitors; ++i)
 355         g_free(areas[i]);
 356     g_free(areas);
 357     return ret;
 358 }
 359
 360 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 361 {
 362     gint l, r, t, b;
 363     gint px, py;
 364     Rect *area;
 365
 366     if (!screen_pointer_pos(&px, &py))
 367         return FALSE;
 368     area = pick_pointer_head(client);
 369
 370     l = area->x;
 371     t = area->y;
 372     r = area->x + area->width - client->frame->area.width;
 373     b = area->y + area->height - client->frame->area.height;
 374
 375     *x = px - client->area.width / 2 - client->frame->size.left;
 376     *x = MIN(MAX(*x, l), r);
 377     *y = py - client->area.height / 2 - client->frame->size.top;
 378     *y = MIN(MAX(*y, t), b);
 379
 380     return TRUE;
 381 }
 382
 383 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 384                                       ObAppSettings *settings)
 385 {
 386     Rect *screen = NULL;
 387
 388     if (!settings || (settings && !settings->pos_given))
 389         return FALSE;
 390
 391     /* Find which head the pointer is on */
 392     if (settings->monitor == 0)
 393         /* this can return NULL */
 394         screen = pick_pointer_head(client);
 395     else if (settings->monitor > 0 &&
 396              (guint)settings->monitor <= screen_num_monitors)
 397         screen = screen_area(client->desktop, (guint)settings->monitor - 1,
 398                              NULL);
 399
 400     /* if we have't found a screen yet.. */
 401     if (!screen) {
 402         Rect **areas;
 403         guint i;
 404
 405         areas = pick_head(client);
 406         screen = areas[0];
 407
 408         /* don't free the first one, it's being set as "screen" */
 409         for (i = 1; i < screen_num_monitors; ++i)
 410             g_free(areas[i]);
 411         g_free(areas);
 412     }
 413
 414     if (settings->position.x.center)
 415         *x = screen->x + screen->width / 2 - client->area.width / 2;
 416     else if (settings->position.x.opposite)
 417         *x = screen->x + screen->width - client->frame->area.width -
 418             settings->position.x.pos;
 419     else
 420         *x = screen->x + settings->position.x.pos;
 421
 422     if (settings->position.y.center)
 423         *y = screen->y + screen->height / 2 - client->area.height / 2;
 424     else if (settings->position.y.opposite)
 425         *y = screen->y + screen->height - client->frame->area.height -
 426             settings->position.y.pos;
 427     else
 428         *y = screen->y + settings->position.y.pos;
 429
 430     g_free(screen);
 431     return TRUE;
 432 }
 433
 434 static gboolean place_transient_splash(ObClient *client, gint *x, gint *y)
 435 {
 436     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 437         GSList *it;
 438         gboolean first = TRUE;
 439         gint l, r, t, b;
 440         for (it = client->parents; it; it = g_slist_next(it)) {
 441             ObClient *m = it->data;
 442             if (!m->iconic) {
 443                 if (first) {
 444                     l = RECT_LEFT(m->frame->area);
 445                     t = RECT_TOP(m->frame->area);
 446                     r = RECT_RIGHT(m->frame->area);
 447                     b = RECT_BOTTOM(m->frame->area);
 448                     first = FALSE;
 449                 } else {
 450                     l = MIN(l, RECT_LEFT(m->frame->area));
 451                     t = MIN(t, RECT_TOP(m->frame->area));
 452                     r = MAX(r, RECT_RIGHT(m->frame->area));
 453                     b = MAX(b, RECT_BOTTOM(m->frame->area));
 454                 }
 455             }
 456             if (!first) {
 457                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 458                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 459                 return TRUE;
 460             }
 461         }
 462     }
 463
 464     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 465         client->type == OB_CLIENT_TYPE_SPLASH)
 466     {
 467         Rect **areas;
 468         guint i;
 469
 470         areas = pick_head(client);
 471
 472         *x = (areas[0]->width - client->frame->area.width) / 2 + areas[0]->x;
 473         *y = (areas[0]->height - client->frame->area.height) / 2 + areas[0]->y;
 474
 475         for (i = 0; i < screen_num_monitors; ++i)
 476             g_free(areas[i]);
 477         g_free(areas);
 478         return TRUE;
 479     }
 480
 481     return FALSE;
 482 }
 483
 484 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 485 gboolean place_client(ObClient *client, gint *x, gint *y,
 486                       ObAppSettings *settings)
 487 {
 488     gboolean ret;
 489     gboolean userplaced = FALSE;
 490
 491     /* per-app settings override program specified position
 492      * but not user specified, unless pos_force is enabled */
 493     if (((client->positioned & USPosition) &&
 494          !(settings && settings->pos_given && settings->pos_force)) ||
 495         ((client->positioned & PPosition) &&
 496          !(settings && settings->pos_given)))
 497         return FALSE;
 498
 499     /* try a number of methods */
 500     ret = place_transient_splash(client, x, y) ||
 501         (userplaced = place_per_app_setting(client, x, y, settings)) ||
 502         (config_place_policy == OB_PLACE_POLICY_MOUSE &&
 503          place_under_mouse(client, x, y)) ||
 504         place_nooverlap(client, x, y) ||
 505         place_random(client, x, y);
 506     g_assert(ret);
 507
 508     /* get where the client should be */
 509     frame_frame_gravity(client->frame, x, y);
 510     return !userplaced;
 511 }