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        Ben 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
  27 static Rect *pick_head(ObClient *c)
  28 {
  29     Rect *area = NULL;
  30     guint i;
  31     gint px, py;
  32
  33     /* try direct parent first */
  34     if (c->transient_for && c->transient_for != OB_TRAN_GROUP) {
  35         return screen_area_monitor(c->desktop,
  36                                    client_monitor(c->transient_for));
  37     }
  38
  39     /* more than one guy in his group (more than just him) */
  40     if (client_has_group_siblings(c)) {
  41         GSList *it;
  42
  43         /* try on the client's desktop */
  44         for (it = c->group->members; it; it = g_slist_next(it)) {
  45             ObClient *itc = it->data;
  46             if (itc != c &&
  47                 (itc->desktop == c->desktop ||
  48                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  49                 return screen_area_monitor(c->desktop,
  50                                            client_monitor(it->data));
  51         }
  52
  53         /* try on all desktops */
  54         for (it = c->group->members; it; it = g_slist_next(it)) {
  55             ObClient *itc = it->data;
  56             if (itc != c)
  57                 return screen_area_monitor(c->desktop,
  58                                            client_monitor(it->data));
  59         }
  60     }
  61
  62     screen_pointer_pos(&px, &py);
  63
  64     for (i = 0; i < screen_num_monitors; i++) {
  65         area = screen_area_monitor(c->desktop, i);
  66         if (RECT_CONTAINS(*area, px, py))
  67             break;
  68     }
  69     if (i == screen_num_monitors)
  70         area = screen_area_monitor(c->desktop, 0);
  71
  72     /* Last resort */
  73     if (!area)
  74         area = screen_area_monitor(c->desktop,
  75                                    g_random_int_range(0, screen_num_monitors));
  76
  77     return area;
  78 }
  79
  80 static gboolean place_random(ObClient *client, gint *x, gint *y)
  81 {
  82     gint l, r, t, b;
  83     Rect *area;
  84
  85     area = pick_head(client);
  86
  87     l = area->x;
  88     t = area->y;
  89     r = area->x + area->width - client->frame->area.width;
  90     b = area->y + area->height - client->frame->area.height;
  91
  92     if (r > l) *x = g_random_int_range(l, r + 1);
  93     else       *x = 0;
  94     if (b > t) *y = g_random_int_range(t, b + 1);
  95     else       *y = 0;
  96
  97     return TRUE;
  98 }
  99
 100 static GSList* area_add(GSList *list, Rect *a)
 101 {
 102     Rect *r = g_new(Rect, 1);
 103     *r = *a;
 104     return g_slist_prepend(list, r);
 105 }
 106
 107 static GSList* area_remove(GSList *list, Rect *a)
 108 {
 109     GSList *sit;
 110     GSList *result = NULL;
 111
 112     for (sit = list; sit; sit = g_slist_next(sit)) {
 113         Rect *r = sit->data;
 114
 115         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 116             result = g_slist_prepend(result, r);
 117             r = NULL; /* dont free it */
 118         } else {
 119             Rect isect, extra;
 120
 121             /* Use an intersection of a and r to determine the space
 122                around r that we can use.
 123
 124                NOTE: the spaces calculated can overlap.
 125             */
 126
 127             RECT_SET_INTERSECTION(isect, *r, *a);
 128
 129             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 130                 RECT_SET(extra, r->x, r->y,
 131                          RECT_LEFT(isect) - r->x, r->height);
 132                 result = area_add(result, &extra);
 133             }
 134
 135             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 136                 RECT_SET(extra, r->x, r->y,
 137                          r->width, RECT_TOP(isect) - r->y + 1);
 138                 result = area_add(result, &extra);
 139             }
 140
 141             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 142                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 143                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 144                 result = area_add(result, &extra);
 145             }
 146
 147             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 148                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 149                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 150                 result = area_add(result, &extra);
 151             }
 152         }
 153
 154         g_free(r);
 155     }
 156     g_slist_free(list);
 157     return result;
 158 }
 159
 160 static gint area_cmp(gconstpointer p1, gconstpointer p2, gpointer data)
 161 {
 162     ObClient *c = data;
 163     Rect *carea = &c->frame->area;
 164     const Rect *a1 = p1, *a2 = p2;
 165     gboolean diffhead = FALSE;
 166     guint i;
 167     Rect *a;
 168
 169     for (i = 0; i < screen_num_monitors; ++i) {
 170         a = screen_physical_area_monitor(i);
 171         if (RECT_CONTAINS(*a, a1->x, a1->y) &&
 172             !RECT_CONTAINS(*a, a2->x, a2->y))
 173         {
 174             diffhead = TRUE;
 175             break;
 176         }
 177     }
 178
 179     /* has to be more than me in the group */
 180     if (diffhead && client_has_group_siblings(c)) {
 181         guint *num, most;
 182         GSList *it;
 183
 184         /* find how many clients in the group are on each monitor, use the
 185            monitor with the most in it */
 186         num = g_new0(guint, screen_num_monitors);
 187         for (it = c->group->members; it; it = g_slist_next(it))
 188             if (it->data != c)
 189                 ++num[client_monitor(it->data)];
 190         most = 0;
 191         for (i = 1; i < screen_num_monitors; ++i)
 192             if (num[i] > num[most])
 193                 most = i;
 194
 195         g_free(num);
 196
 197         a = screen_physical_area_monitor(most);
 198         if (RECT_CONTAINS(*a, a1->x, a1->y))
 199             return -1;
 200         if (RECT_CONTAINS(*a, a2->x, a2->y))
 201             return 1;
 202     }
 203
 204     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 205         MIN((a2->width - carea->width), (a2->height - carea->height));
 206 }
 207
 208 typedef enum
 209 {
 210     SMART_FULL,
 211     SMART_GROUP,
 212     SMART_FOCUSED
 213 } ObSmartType;
 214
 215 #define SMART_IGNORE(placer, c) \
 216     (placer == c || !c->frame->visible || c->shaded || !client_normal(c) || \
 217      (c->desktop != DESKTOP_ALL && \
 218       c->desktop != (placer->desktop == DESKTOP_ALL ? \
 219                      screen_desktop : placer->desktop)))
 220
 221 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 222                             ObSmartType type)
 223 {
 224     gboolean ret = FALSE;
 225     GSList *spaces = NULL, *sit;
 226     GList *it;
 227
 228     spaces = area_add(spaces, pick_head(client));
 229
 230     /* stay out from under windows in higher layers */
 231     for (it = stacking_list; it; it = g_list_next(it)) {
 232         ObClient *c;
 233
 234         if (WINDOW_IS_CLIENT(it->data)) {
 235             c = it->data;
 236             if (c->fullscreen)
 237                 continue;
 238         } else
 239             continue;
 240
 241         if (c->layer > client->layer) {
 242             if (!SMART_IGNORE(client, c))
 243                 spaces = area_remove(spaces, &c->frame->area);
 244         } else
 245             break;
 246     }
 247
 248     if (client->type == OB_CLIENT_TYPE_NORMAL) {
 249         if (type == SMART_FULL || type == SMART_FOCUSED) {
 250             gboolean found_foc = FALSE, stop = FALSE;
 251             ObClient *foc;
 252             GList *list;
 253
 254             list = focus_order[client->desktop == DESKTOP_ALL ?
 255                                screen_desktop : client->desktop];
 256             foc = list ? list->data : NULL;
 257
 258             for (; it && !stop; it = g_list_next(it)) {
 259                 ObClient *c;
 260
 261                 if (WINDOW_IS_CLIENT(it->data)) {
 262                     c = it->data;
 263                     if (c->fullscreen)
 264                         continue;
 265                 } else
 266                     continue;
 267
 268                 if (!SMART_IGNORE(client, c)) {
 269                     if (type == SMART_FOCUSED)
 270                         if (found_foc)
 271                             stop = TRUE;
 272                     if (!stop)
 273                         spaces = area_remove(spaces, &c->frame->area);
 274                 }
 275
 276                 if (c == foc)
 277                     found_foc = TRUE;
 278             }
 279         } else if (type == SMART_GROUP) {
 280             /* has to be more than me in the group */
 281             if (!client_has_group_siblings(client))
 282                 return FALSE;
 283
 284             for (sit = client->group->members; sit; sit = g_slist_next(sit)) {
 285                 ObClient *c = sit->data;
 286                 if (!SMART_IGNORE(client, c))
 287                     spaces = area_remove(spaces, &c->frame->area);
 288             }
 289         } else
 290             g_assert_not_reached();
 291     }
 292
 293     spaces = g_slist_sort_with_data(spaces, area_cmp, client);
 294
 295     for (sit = spaces; sit; sit = g_slist_next(sit)) {
 296         Rect *r = sit->data;
 297
 298         if (!ret) {
 299             if (r->width >= client->frame->area.width &&
 300                 r->height >= client->frame->area.height) {
 301                 ret = TRUE;
 302                 if (client->type == OB_CLIENT_TYPE_DIALOG ||
 303                     type != SMART_FULL)
 304                 {
 305                     *x = r->x + (r->width - client->frame->area.width) / 2;
 306                     *y = r->y + (r->height - client->frame->area.height) / 2;
 307                 } else {
 308                     *x = r->x;
 309                     *y = r->y;
 310                 }
 311             }
 312         }
 313
 314         g_free(r);
 315     }
 316     g_slist_free(spaces);
 317
 318     return ret;
 319 }
 320
 321 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 322 {
 323     gint l, r, t, b;
 324     gint px, py;
 325     Rect *area;
 326
 327     area = pick_head(client);
 328     screen_pointer_pos(&px, &py);
 329
 330     l = area->x;
 331     t = area->y;
 332     r = area->x + area->width - client->frame->area.width;
 333     b = area->y + area->height - client->frame->area.height;
 334
 335     *x = px - client->area.width / 2 - client->frame->size.left;
 336     *x = MIN(MAX(*x, l), r);
 337     *y = py - client->area.height / 2 - client->frame->size.top;
 338     *y = MIN(MAX(*y, t), b);
 339
 340     return TRUE;
 341 }
 342
 343 static gboolean place_per_app_setting(ObClient *client, gint *x, gint *y,
 344                                       ObAppSettings *settings)
 345 {
 346     Rect *screen;
 347
 348     if (!settings || (settings && !settings->pos_given))
 349         return FALSE;
 350
 351     /* Find which head the pointer is on */
 352     if (settings->head == -1)
 353         screen = pick_head(client);
 354     else
 355         screen = screen_area_monitor(client->desktop, settings->head);
 356
 357     if (settings->center_x)
 358         *x = screen->x + screen->width / 2 - client->area.width / 2;
 359     else
 360         *x = screen->x + settings->position.x;
 361
 362     if (settings->center_y)
 363         *y = screen->y + screen->height / 2 - client->area.height / 2;
 364     else
 365         *y = screen->y + settings->position.y;
 366
 367     return TRUE;
 368 }
 369
 370 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 371 {
 372     if (client->transient_for) {
 373         if (client->transient_for != OB_TRAN_GROUP) {
 374             ObClient *c = client;
 375             ObClient *p = client->transient_for;
 376             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 377                 p->frame->area.x;
 378             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 379                 p->frame->area.y;
 380             return TRUE;
 381         } else {
 382             GSList *it;
 383             gboolean first = TRUE;
 384             gint l, r, t, b;
 385             for (it = client->group->members; it; it = g_slist_next(it)) {
 386                 ObClient *m = it->data;
 387                 if (!(m == client || m->transient_for)) {
 388                     if (first) {
 389                         l = RECT_LEFT(m->frame->area);
 390                         t = RECT_TOP(m->frame->area);
 391                         r = RECT_RIGHT(m->frame->area);
 392                         b = RECT_BOTTOM(m->frame->area);
 393                         first = FALSE;
 394                     } else {
 395                         l = MIN(l, RECT_LEFT(m->frame->area));
 396                         t = MIN(t, RECT_TOP(m->frame->area));
 397                         r = MAX(r, RECT_RIGHT(m->frame->area));
 398                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 399                     }
 400                 }
 401             }
 402             if (!first) {
 403                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 404                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 405                 return TRUE;
 406             }
 407         }
 408     }
 409     return FALSE;
 410 }
 411
 412 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 413 gboolean place_client(ObClient *client, gint *x, gint *y,
 414                       ObAppSettings *settings)
 415 {
 416     gboolean ret = FALSE;
 417     if (client->positioned)
 418         return FALSE;
 419     if (place_transient(client, x, y))
 420         ret = TRUE;
 421     else if (!(
 422         place_per_app_setting(client, x, y, settings) ||
 423         ((config_place_policy == OB_PLACE_POLICY_MOUSE) ?
 424          place_under_mouse(client, x, y) :
 425          place_smart(client, x, y, SMART_FULL)    ||
 426          place_smart(client, x, y, SMART_GROUP)   ||
 427          place_smart(client, x, y, SMART_FOCUSED) ||
 428          place_random(client, x, y))))
 429         g_assert_not_reached(); /* the last one better succeed */
 430     /* get where the client should be */
 431     frame_frame_gravity(client->frame, x, y);
 432     return ret;
 433 }