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