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     Rect *carea = data;
 146     const Rect *a1 = p1, *a2 = p2;
 147
 148     return MIN((a1->width - carea->width), (a1->height - carea->height)) -
 149         MIN((a2->width - carea->width), (a2->height - carea->height));
 150 }
 151
 152 static gboolean place_smart(ObClient *client, gint *x, gint *y,
 153                             gboolean only_focused)
 154 {
 155     guint i;
 156     gboolean ret = FALSE;
 157     GSList *spaces = NULL, *sit;
 158     GList *it, *list;
 159
 160     list = focus_order[client->desktop == DESKTOP_ALL ?
 161                        screen_desktop : client->desktop];
 162
 163     for (i = 0; i < screen_num_monitors; ++i)
 164         spaces = area_add(spaces, screen_area_monitor(client->desktop, i));
 165
 166     for (it = list; it; it = g_list_next(it)) {
 167         ObClient *c = it->data;
 168
 169         if (c != client && !c->shaded && client_normal(c)) {
 170             spaces = area_remove(spaces, &c->frame->area);
 171             if (only_focused)
 172                 break;
 173         }
 174     }
 175
 176     spaces = g_slist_sort_with_data(spaces, area_cmp, &client->frame->area);
 177
 178     for (sit = spaces; sit; sit = g_slist_next(sit)) {
 179         Rect *r = sit->data;
 180
 181         if (!ret) {
 182             if (r->width >= client->frame->area.width &&
 183                 r->height >= client->frame->area.height) {
 184                 ret = TRUE;
 185                 if (only_focused) {
 186                     *x = r->x + (r->width - client->frame->area.width) / 2;
 187                     *y = r->y + (r->height - client->frame->area.height) / 2;
 188                 } else {
 189                     *x = r->x;
 190                     *y = r->y;
 191                 }
 192             }
 193         }
 194
 195         g_free(r);
 196     }
 197     g_slist_free(spaces);
 198
 199     return ret;
 200 }
 201
 202 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 203 {
 204     guint i;
 205     gint l, r, t, b;
 206     gint px, py;
 207     Rect *area;
 208
 209     screen_pointer_pos(&px, &py);
 210
 211     for (i = 0; i < screen_num_monitors; ++i) {
 212         area = screen_area_monitor(client->desktop, i);
 213         if (RECT_CONTAINS(*area, px, py))
 214             break;
 215     }
 216     if (i == screen_num_monitors)
 217         area = screen_area_monitor(client->desktop, 0);
 218
 219     l = area->x;
 220     t = area->y;
 221     r = area->x + area->width - client->frame->area.width;
 222     b = area->y + area->height - client->frame->area.height;
 223
 224     *x = px - client->area.width / 2 - client->frame->size.left;
 225     *x = MIN(MAX(*x, l), r);
 226     *y = py - client->area.height / 2 - client->frame->size.top;
 227     *y = MIN(MAX(*y, t), b);
 228
 229     return TRUE;
 230 }
 231
 232 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 233 {
 234     if (client->transient_for) {
 235         if (client->transient_for != OB_TRAN_GROUP) {
 236             ObClient *c = client;
 237             ObClient *p = client->transient_for;
 238             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 239                 p->frame->area.x;
 240             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 241                 p->frame->area.y;
 242             return TRUE;
 243         } else {
 244             GSList *it;
 245             gboolean first = TRUE;
 246             int l, r, t, b;
 247             for (it = client->group->members; it; it = it->next) {
 248                 ObClient *m = it->data;
 249                 if (!(m == client || m->transient_for)) {
 250                     if (first) {
 251                         l = RECT_LEFT(m->frame->area);
 252                         t = RECT_TOP(m->frame->area);
 253                         r = RECT_RIGHT(m->frame->area);
 254                         b = RECT_BOTTOM(m->frame->area);
 255                         first = FALSE;
 256                     } else {
 257                         l = MIN(l, RECT_LEFT(m->frame->area));
 258                         t = MIN(t, RECT_TOP(m->frame->area));
 259                         r = MAX(r, RECT_RIGHT(m->frame->area));
 260                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 261                     }
 262                 }
 263             }
 264             if (!first) {
 265                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 266                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 267                 return TRUE;
 268             }
 269         }
 270     }
 271     return FALSE;
 272 }
 273
 274 static gboolean place_dialog(ObClient *client, gint *x, gint *y)
 275 {
 276     /* center parentless dialogs on the screen */
 277     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 278         Rect *area;
 279
 280         area = pick_head(client);
 281         if (!area)
 282             area = screen_area_monitor(client->desktop, 0);
 283
 284         *x = (area->width - client->frame->area.width) / 2 + area->x;
 285         *y = (area->height - client->frame->area.height) / 2 + area->y;
 286         return TRUE;
 287     }
 288     return FALSE;
 289 }
 290
 291 void place_client(ObClient *client, gint *x, gint *y)
 292 {
 293     if (client->positioned)
 294         return;
 295     if (place_transient(client, x, y)    ||
 296         place_dialog(client, x, y)       ||
 297         place_smart(client, x, y, FALSE) ||
 298         place_smart(client, x, y, TRUE)  ||
 299         (config_focus_follow ?
 300          place_under_mouse(client, x, y) :
 301          place_random(client, x, y)))
 302     {
 303         /* get where the client should be */
 304         frame_frame_gravity(client->frame, x, y);
 305     } else
 306         g_assert_not_reached(); /* the last one better succeed */
 307 }