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) 2003        Ben Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "client.h"
  20 #include "group.h"
  21 #include "screen.h"
  22 #include "frame.h"
  23 #include "focus.h"
  24 #include "config.h"
  25
  26 static Rect* pick_head(ObClient *c)
  27 {
  28     /* try direct parent first */
  29     if (c->transient_for && c->transient_for != OB_TRAN_GROUP) {
  30         return screen_area_monitor(c->desktop,
  31                                    client_monitor(c->transient_for));
  32     }
  33
  34     /* more than one guy in his group (more than just him) */
  35     if (c->group && c->group->members->next) {
  36         GSList *it;
  37
  38         /* try on the client's desktop */
  39         for (it = c->group->members; it; it = g_slist_next(it)) {
  40             ObClient *itc = it->data;
  41             if (itc != c &&
  42                 (itc->desktop == c->desktop ||
  43                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  44                 return screen_area_monitor(c->desktop,
  45                                            client_monitor(it->data));
  46         }
  47
  48         /* try on all desktops */
  49         for (it = c->group->members; it; it = g_slist_next(it)) {
  50             ObClient *itc = it->data;
  51             if (itc != c)
  52                 return screen_area_monitor(c->desktop,
  53                                            client_monitor(it->data));
  54         }
  55     }
  56
  57     return NULL;
  58 }
  59
  60 static gboolean place_random(ObClient *client, gint *x, gint *y)
  61 {
  62     int l, r, t, b;
  63     Rect *area;
  64
  65     area = pick_head(client);
  66     if (!area)
  67         area = screen_area_monitor(client->desktop,
  68                                    g_random_int_range(0, screen_num_monitors));
  69
  70     l = area->x;
  71     t = area->y;
  72     r = area->x + area->width - client->frame->area.width;
  73     b = area->y + area->height - client->frame->area.height;
  74
  75     if (r > l) *x = g_random_int_range(l, r + 1);
  76     else       *x = 0;
  77     if (b > t) *y = g_random_int_range(t, b + 1);
  78     else       *y = 0;
  79
  80     return TRUE;
  81 }
  82
  83 static GSList* area_add(GSList *list, Rect *a)
  84 {
  85     Rect *r = g_new(Rect, 1);
  86     *r = *a;
  87     return g_slist_prepend(list, r);
  88 }
  89
  90 static GSList* area_remove(GSList *list, Rect *a)
  91 {
  92     GSList *sit;
  93     GSList *result = NULL;
  94
  95     for (sit = list; sit; sit = g_slist_next(sit)) {
  96         Rect *r = sit->data;
  97
  98         if (!RECT_INTERSECTS_RECT(*r, *a)) {
  99             result = g_slist_prepend(result, r);
 100             r = NULL; /* dont free it */
 101         } else {
 102             Rect isect, extra;
 103
 104             /* Use an intersection of a and r to determine the space
 105                around r that we can use.
 106
 107                NOTE: the spaces calculated can overlap.
 108             */
 109
 110             RECT_SET_INTERSECTION(isect, *r, *a);
 111
 112             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
 113                 RECT_SET(extra, r->x, r->y,
 114                          RECT_LEFT(isect) - r->x, r->height);
 115                 result = area_add(result, &extra);
 116             }
 117
 118             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 119                 RECT_SET(extra, r->x, r->y,
 120                          r->width, RECT_TOP(isect) - r->y + 1);
 121                 result = area_add(result, &extra);
 122             }
 123
 124             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 125                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 126                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 127                 result = area_add(result, &extra);
 128             }
 129
 130             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 131                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 132                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 133                 result = area_add(result, &extra);
 134             }
 135         }
 136
 137         g_free(r);
 138     }
 139     g_slist_free(list);
 140     return result;
 141 }
 142
 143 static gint area_cmp(gconstpointer p1, gconstpointer p2, gpointer data)
 144 {
 145     ObClient *c = data;
 146     Rect *carea = &c->frame->area;
 147     const Rect *a1 = p1, *a2 = p2;
 148     gboolean diffhead = FALSE;
 149     guint i;
 150     Rect *a;
 151
 152     for (i = 0; i < screen_num_monitors; ++i) {
 153         a = screen_physical_area_monitor(i);
 154         if (RECT_CONTAINS(*a, a1->x, a1->y) &&
 155             !RECT_CONTAINS(*a, a2->x, a2->y))
 156         {
 157             diffhead = TRUE;
 158             break;
 159         }
 160     }
 161
 162     /* has to be more than me in the group */
 163     if (diffhead && c->group && c->group->members->next) {
 164         guint *num, most;
 165         GSList *it;
 166
 167         /* find how many clients in the group are on each monitor, use the
 168            monitor with the most in it */
 169         num = g_new0(guint, screen_num_monitors);
 170         for (it = c->group->members; it; it = g_slist_next(it))
 171             if (it->data != c)
 172                 ++num[client_monitor(it->data)];
 173         most = 0;
 174         for (i = 1; i < screen_num_monitors; ++i)
 175             if (num[i] > num[most])
 176                 most = i;
 177
 178         a = screen_physical_area_monitor(most);
 179         if (RECT_CONTAINS(*a, a1->x, a1->y))
 180             return -1;
 181         if (RECT_CONTAINS(*a, a2->x, a2->y))
 182             return 1;
 183     }
 184
 185     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 186         MIN((a2->width - carea->width), (a2->height - carea->height));
 187 }
 188
 189 typedef enum
 190 {
 191     SMART_FULL,
 192     SMART_GROUP,
 193     SMART_FOCUSED
 194 } ObSmartType;
 195
 196 #define SMART_IGNORE(placer, c)                             \
 197     (placer == c || c->shaded || !client_normal(c) ||       \
 198      (c->desktop != DESKTOP_ALL &&                          \
 199       c->desktop != (placer->desktop == DESKTOP_ALL ?       \
 200                      screen_desktop : placer->desktop)))
 201
 202 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 203                             ObSmartType type)
 204 {
 205     guint i;
 206     gboolean ret = FALSE;
 207     GSList *spaces = NULL, *sit;
 208     GList *it;
 209
 210     for (i = 0; i < screen_num_monitors; ++i)
 211         spaces = area_add(spaces, screen_area_monitor(client->desktop, i));
 212
 213     if (type == SMART_FULL || type == SMART_FOCUSED) {
 214         gboolean found_foc = FALSE, stop = FALSE;
 215         ObClient *foc;
 216         GList *list;
 217
 218         list = focus_order[client->desktop == DESKTOP_ALL ?
 219                            screen_desktop : client->desktop];
 220         foc = list ? list->data : NULL;
 221
 222         for (it = stacking_list; it && !stop; it = g_list_next(it))
 223         {
 224             ObClient *c;
 225
 226             if (WINDOW_IS_CLIENT(it->data))
 227                 c = it->data;
 228             else
 229                 continue;
 230
 231             if (!SMART_IGNORE(client, c)) {
 232                 if (type == SMART_FOCUSED) {
 233                     if (c->layer <= client->layer && found_foc)
 234                         stop = TRUE;
 235                 }
 236                 if (!stop)
 237                     spaces = area_remove(spaces, &c->frame->area);
 238             }
 239
 240             if (c == foc)
 241                 found_foc = TRUE;
 242         }
 243     } else if (type == SMART_GROUP) {
 244         /* has to be more than me in the group */
 245         if (!client->group || !client->group->members->next)
 246             return FALSE;
 247
 248         for (sit = client->group->members; sit; sit = g_slist_next(sit)) {
 249             ObClient *c = sit->data;
 250             if (!SMART_IGNORE(client, c))
 251                 spaces = area_remove(spaces, &c->frame->area);
 252         }
 253     } else
 254         g_assert_not_reached();
 255
 256     spaces = g_slist_sort_with_data(spaces, area_cmp, client);
 257
 258     for (sit = spaces; sit; sit = g_slist_next(sit)) {
 259         Rect *r = sit->data;
 260
 261         if (!ret) {
 262             if (r->width >= client->frame->area.width &&
 263                 r->height >= client->frame->area.height) {
 264                 ret = TRUE;
 265                 if (type != SMART_FULL) {
 266                     *x = r->x + (r->width - client->frame->area.width) / 2;
 267                     *y = r->y + (r->height - client->frame->area.height) / 2;
 268                 } else {
 269                     *x = r->x;
 270                     *y = r->y;
 271                 }
 272             }
 273         }
 274
 275         g_free(r);
 276     }
 277     g_slist_free(spaces);
 278
 279     return ret;
 280 }
 281
 282 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 283 {
 284     guint i;
 285     gint l, r, t, b;
 286     gint px, py;
 287     Rect *area;
 288
 289     screen_pointer_pos(&px, &py);
 290
 291     for (i = 0; i < screen_num_monitors; ++i) {
 292         area = screen_area_monitor(client->desktop, i);
 293         if (RECT_CONTAINS(*area, px, py))
 294             break;
 295     }
 296     if (i == screen_num_monitors)
 297         area = screen_area_monitor(client->desktop, 0);
 298
 299     l = area->x;
 300     t = area->y;
 301     r = area->x + area->width - client->frame->area.width;
 302     b = area->y + area->height - client->frame->area.height;
 303
 304     *x = px - client->area.width / 2 - client->frame->size.left;
 305     *x = MIN(MAX(*x, l), r);
 306     *y = py - client->area.height / 2 - client->frame->size.top;
 307     *y = MIN(MAX(*y, t), b);
 308
 309     return TRUE;
 310 }
 311
 312 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 313 {
 314     if (client->transient_for) {
 315         if (client->transient_for != OB_TRAN_GROUP) {
 316             ObClient *c = client;
 317             ObClient *p = client->transient_for;
 318             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 319                 p->frame->area.x;
 320             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 321                 p->frame->area.y;
 322             return TRUE;
 323         } else {
 324             GSList *it;
 325             gboolean first = TRUE;
 326             int l, r, t, b;
 327             for (it = client->group->members; it; it = it->next) {
 328                 ObClient *m = it->data;
 329                 if (!(m == client || m->transient_for)) {
 330                     if (first) {
 331                         l = RECT_LEFT(m->frame->area);
 332                         t = RECT_TOP(m->frame->area);
 333                         r = RECT_RIGHT(m->frame->area);
 334                         b = RECT_BOTTOM(m->frame->area);
 335                         first = FALSE;
 336                     } else {
 337                         l = MIN(l, RECT_LEFT(m->frame->area));
 338                         t = MIN(t, RECT_TOP(m->frame->area));
 339                         r = MAX(r, RECT_RIGHT(m->frame->area));
 340                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 341                     }
 342                 }
 343             }
 344             if (!first) {
 345                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 346                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 347                 return TRUE;
 348             }
 349         }
 350     }
 351     return FALSE;
 352 }
 353
 354 static gboolean place_dialog(ObClient *client, gint *x, gint *y)
 355 {
 356     /* center parentless dialogs on the screen */
 357     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 358         Rect *area;
 359
 360         area = pick_head(client);
 361         if (!area)
 362             area = screen_area_monitor(client->desktop, 0);
 363
 364         *x = (area->width - client->frame->area.width) / 2 + area->x;
 365         *y = (area->height - client->frame->area.height) / 2 + area->y;
 366         return TRUE;
 367     }
 368     return FALSE;
 369 }
 370
 371 void place_client(ObClient *client, gint *x, gint *y)
 372 {
 373     if (client->positioned)
 374         return;
 375     if (place_transient(client, x, y)            ||
 376         place_dialog(client, x, y)               ||
 377         place_smart(client, x, y, SMART_FULL)    ||
 378         place_smart(client, x, y, SMART_GROUP)   ||
 379         place_smart(client, x, y, SMART_FOCUSED) ||
 380         (config_focus_follow ?
 381          place_under_mouse(client, x, y) :
 382          place_random(client, x, y)))
 383     {
 384         /* get where the client should be */
 385         frame_frame_gravity(client->frame, x, y);
 386     } else
 387         g_assert_not_reached(); /* the last one better succeed */
 388 }