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