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     gint i;
  31
  32     /* try direct parent first */
  33     if (c->transient_for && c->transient_for != OB_TRAN_GROUP) {
  34         return screen_area_monitor(c->desktop,
  35                                    client_monitor(c->transient_for));
  36     }
  37
  38     /* more than one guy in his group (more than just him) */
  39     if (client_has_group_siblings(c)) {
  40         GSList *it;
  41
  42         /* try on the client's desktop */
  43         for (it = c->group->members; it; it = g_slist_next(it)) {
  44             ObClient *itc = it->data;
  45             if (itc != c &&
  46                 (itc->desktop == c->desktop ||
  47                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  48                 return screen_area_monitor(c->desktop,
  49                                            client_monitor(it->data));
  50         }
  51
  52         /* try on all desktops */
  53         for (it = c->group->members; it; it = g_slist_next(it)) {
  54             ObClient *itc = it->data;
  55             if (itc != c)
  56                 return screen_area_monitor(c->desktop,
  57                                            client_monitor(it->data));
  58         }
  59     }
  60
  61     screen_pointer_pos(&px, &py);
  62
  63     for (i = 0; i < screen_num_monitors; i++) {
  64         area = screen_area_monitor(client->desktop, i);
  65         if (RECT_CONTAINS(*area, px, py))
  66             break;
  67     }
  68     if (i == screen_num_monitors)
  69         area = screen_area_monitor(client->desktop, 0);
  70
  71     /* Last resort */
  72     if (!area)
  73         area = screen_area_monitor(client->desktop,
  74                                    g_random_int_range(0, screen_num_monitors));
  75
  76     return area;
  77 }
  78
  79 static gboolean place_random(ObClient *client, gint *x, gint *y)
  80 {
  81     gint l, r, t, b;
  82     Rect *area;
  83
  84     area = pick_head(client);
  85
  86     l = area->x;
  87     t = area->y;
  88     r = area->x + area->width - client->frame->area.width;
  89     b = area->y + area->height - client->frame->area.height;
  90
  91     if (r > l) *x = g_random_int_range(l, r + 1);
  92     else       *x = 0;
  93     if (b > t) *y = g_random_int_range(t, b + 1);
  94     else       *y = 0;
  95
  96     return TRUE;
  97 }
  98
  99 static GSList* area_add(GSList *list, Rect *a)
 100 {
 101     Rect *r = g_new(Rect, 1);
 102     *r = *a;
 103     return g_slist_prepend(list, r);
 104 }
 105
 106 static GSList* area_remove(GSList *list, Rect *a)
 107 {
 108     GSList *sit;
 109     GSList *result = NULL;
 110
 111     for (sit = list; sit; sit = g_slist_next(sit)) {
 112         Rect *r = sit->data;
 113
 114         if (!RECT_INTERSECTS_RECT(*r, *a)) {
 115             result = g_slist_prepend(result, r);
 116             r = NULL; /* dont free it */
 117         } else {
 118             Rect isect, extra;
 119
 120             /* Use an intersection of a and r to determine the space
 121                around r that we can use.
 122
 123                NOTE: the spaces calculated can overlap.
 124             */
 125
 126             RECT_SET_INTERSECTION(isect, *r, *a);
 127
 128             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 129                 RECT_SET(extra, r->x, r->y,
 130                          RECT_LEFT(isect) - r->x, r->height);
 131                 result = area_add(result, &extra);
 132             }
 133
 134             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 135                 RECT_SET(extra, r->x, r->y,
 136                          r->width, RECT_TOP(isect) - r->y + 1);
 137                 result = area_add(result, &extra);
 138             }
 139
 140             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 141                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 142                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 143                 result = area_add(result, &extra);
 144             }
 145
 146             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 147                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 148                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 149                 result = area_add(result, &extra);
 150             }
 151         }
 152
 153         g_free(r);
 154     }
 155     g_slist_free(list);
 156     return result;
 157 }
 158
 159 static gint area_cmp(gconstpointer p1, gconstpointer p2, gpointer data)
 160 {
 161     ObClient *c = data;
 162     Rect *carea = &c->frame->area;
 163     const Rect *a1 = p1, *a2 = p2;
 164     gboolean diffhead = FALSE;
 165     guint i;
 166     Rect *a;
 167
 168     for (i = 0; i < screen_num_monitors; ++i) {
 169         a = screen_physical_area_monitor(i);
 170         if (RECT_CONTAINS(*a, a1->x, a1->y) &&
 171             !RECT_CONTAINS(*a, a2->x, a2->y))
 172         {
 173             diffhead = TRUE;
 174             break;
 175         }
 176     }
 177
 178     /* has to be more than me in the group */
 179     if (diffhead && client_has_group_siblings(c)) {
 180         guint *num, most;
 181         GSList *it;
 182
 183         /* find how many clients in the group are on each monitor, use the
 184            monitor with the most in it */
 185         num = g_new0(guint, screen_num_monitors);
 186         for (it = c->group->members; it; it = g_slist_next(it))
 187             if (it->data != c)
 188                 ++num[client_monitor(it->data)];
 189         most = 0;
 190         for (i = 1; i < screen_num_monitors; ++i)
 191             if (num[i] > num[most])
 192                 most = i;
 193
 194         g_free(num);
 195
 196         a = screen_physical_area_monitor(most);
 197         if (RECT_CONTAINS(*a, a1->x, a1->y))
 198             return -1;
 199         if (RECT_CONTAINS(*a, a2->x, a2->y))
 200             return 1;
 201     }
 202
 203     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 204         MIN((a2->width - carea->width), (a2->height - carea->height));
 205 }
 206
 207 typedef enum
 208 {
 209     SMART_FULL,
 210     SMART_GROUP,
 211     SMART_FOCUSED
 212 } ObSmartType;
 213
 214 #define SMART_IGNORE(placer, c) \
 215     (placer == c || !c->frame->visible || c->shaded || !client_normal(c) || \
 216      (c->desktop != DESKTOP_ALL && \
 217       c->desktop != (placer->desktop == DESKTOP_ALL ? \
 218                      screen_desktop : placer->desktop)))
 219
 220 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 221                             ObSmartType type)
 222 {
 223     guint i;
 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     guint i;
 324     gint l, r, t, b;
 325     gint px, py;
 326     Rect *area;
 327
 328     area = pick_head(client);
 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     gint px, py, i;
 347     Rect *screen;
 348
 349     if (!settings || (settings && !settings->pos_given))
 350         return FALSE;
 351
 352     /* Find which head the pointer is on */
 353     if (settings->head == -1)
 354         screen = pick_head(client);
 355     else
 356         screen = screen_area_monitor(client->desktop, settings->head);
 357
 358     if (settings->center_x)
 359         *x = screen->x + screen->width / 2 - client->area.width / 2;
 360     else
 361         *x = screen->x + settings->position.x;
 362
 363     if (settings->center_y)
 364         *y = screen->y + screen->height / 2 - client->area.height / 2;
 365     else
 366         *y = screen->y + settings->position.y;
 367
 368     return TRUE;
 369 }
 370
 371 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 372 {
 373     if (client->transient_for) {
 374         if (client->transient_for != OB_TRAN_GROUP) {
 375             ObClient *c = client;
 376             ObClient *p = client->transient_for;
 377             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 378                 p->frame->area.x;
 379             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 380                 p->frame->area.y;
 381             return TRUE;
 382         } else {
 383             GSList *it;
 384             gboolean first = TRUE;
 385             gint l, r, t, b;
 386             for (it = client->group->members; it; it = g_slist_next(it)) {
 387                 ObClient *m = it->data;
 388                 if (!(m == client || m->transient_for)) {
 389                     if (first) {
 390                         l = RECT_LEFT(m->frame->area);
 391                         t = RECT_TOP(m->frame->area);
 392                         r = RECT_RIGHT(m->frame->area);
 393                         b = RECT_BOTTOM(m->frame->area);
 394                         first = FALSE;
 395                     } else {
 396                         l = MIN(l, RECT_LEFT(m->frame->area));
 397                         t = MIN(t, RECT_TOP(m->frame->area));
 398                         r = MAX(r, RECT_RIGHT(m->frame->area));
 399                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 400                     }
 401                 }
 402             }
 403             if (!first) {
 404                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 405                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 406                 return TRUE;
 407             }
 408         }
 409     }
 410     return FALSE;
 411 }
 412
 413 /* Return TRUE if we want client.c to enforce on-screen-keeping */
 414 gboolean place_client(ObClient *client, gint *x, gint *y,
 415                       ObAppSettings *settings)
 416 {
 417     gboolean ret = FALSE;
 418     if (client->positioned)
 419         return FALSE;
 420     if (place_transient(client, x, y))
 421         ret = TRUE;
 422     else if (!(
 423         place_per_app_setting(client, x, y, settings) ||
 424         ((config_place_policy == OB_PLACE_POLICY_MOUSE) ?
 425          place_under_mouse(client, x, y) :
 426          place_smart(client, x, y, SMART_FULL)    ||
 427          place_smart(client, x, y, SMART_GROUP)   ||
 428          place_smart(client, x, y, SMART_FOCUSED) ||
 429          place_random(client, x, y))))
 430         g_assert_not_reached(); /* the last one better succeed */
 431     /* get where the client should be */
 432     frame_frame_gravity(client->frame, x, y);
 433     return ret;
 434 }