openbox/place.c

   1 #include "client.h"
   2 #include "group.h"
   3 #include "screen.h"
   4 #include "frame.h"
   5 #include "focus.h"
   6 #include "config.h"
   7
   8 static Rect* pick_head(ObClient *c)
   9 {
  10     /* try direct parent first */
  11     if (c->transient_for && c->transient_for != OB_TRAN_GROUP) {
  12         return screen_area_monitor(c->desktop,
  13                                    client_monitor(c->transient_for));
  14     }
  15
  16     /* more than one guy in his group (more than just him) */
  17     if (c->group && c->group->members->next) {
  18         GSList *it;
  19
  20         /* try on the client's desktop */
  21         for (it = c->group->members; it; it = g_slist_next(it)) {
  22             ObClient *itc = it->data;
  23             if (itc != c &&
  24                 (itc->desktop == c->desktop ||
  25                  itc->desktop == DESKTOP_ALL || c->desktop == DESKTOP_ALL))
  26                 return screen_area_monitor(c->desktop,
  27                                            client_monitor(it->data));
  28         }
  29
  30         /* try on all desktops */
  31         for (it = c->group->members; it; it = g_slist_next(it)) {
  32             ObClient *itc = it->data;
  33             if (itc != c)
  34                 return screen_area_monitor(c->desktop,
  35                                            client_monitor(it->data));
  36         }
  37     }
  38
  39     return NULL;
  40 }
  41
  42 static gboolean place_random(ObClient *client, gint *x, gint *y)
  43 {
  44     int l, r, t, b;
  45     Rect *area;
  46
  47     area = pick_head(client);
  48     if (!area)
  49         area = screen_area_monitor(client->desktop,
  50                                    g_random_int_range(0, screen_num_monitors));
  51
  52     l = area->x;
  53     t = area->y;
  54     r = area->x + area->width - client->frame->area.width;
  55     b = area->y + area->height - client->frame->area.height;
  56
  57     if (r > l) *x = g_random_int_range(l, r + 1);
  58     else       *x = 0;
  59     if (b > t) *y = g_random_int_range(t, b + 1);
  60     else       *y = 0;
  61
  62     return TRUE;
  63 }
  64
  65 static GSList* area_add(GSList *list, Rect *a)
  66 {
  67     Rect *r = g_new(Rect, 1);
  68     *r = *a;
  69     return g_slist_prepend(list, r);
  70 }
  71
  72 static GSList* area_remove(GSList *list, Rect *a)
  73 {
  74     GSList *sit;
  75     GSList *result = NULL;
  76
  77     for (sit = list; sit; sit = g_slist_next(sit)) {
  78         Rect *r = sit->data;
  79
  80         if (!RECT_INTERSECTS_RECT(*r, *a)) {
  81             result = g_slist_prepend(result, r);
  82             r = NULL; /* dont free it */
  83         } else {
  84             Rect isect, extra;
  85
  86             /* Use an intersection of a and r to determine the space
  87                around r that we can use.
  88
  89                NOTE: the spaces calculated can overlap.
  90             */
  91
  92             RECT_SET_INTERSECTION(isect, *r, *a);
  93
  94             if (RECT_LEFT(isect) > RECT_LEFT(*r)) {
  95                 RECT_SET(extra, r->x, r->y,
  96                          RECT_LEFT(isect) - r->x, r->height);
  97                 result = area_add(result, &extra);
  98             }
  99
 100             if (RECT_TOP(isect) > RECT_TOP(*r)) {
 101                 RECT_SET(extra, r->x, r->y,
 102                          r->width, RECT_TOP(isect) - r->y + 1);
 103                 result = area_add(result, &extra);
 104             }
 105
 106             if (RECT_RIGHT(isect) < RECT_RIGHT(*r)) {
 107                 RECT_SET(extra, RECT_RIGHT(isect) + 1, r->y,
 108                          RECT_RIGHT(*r) - RECT_RIGHT(isect), r->height);
 109                 result = area_add(result, &extra);
 110             }
 111
 112             if (RECT_BOTTOM(isect) < RECT_BOTTOM(*r)) {
 113                 RECT_SET(extra, r->x, RECT_BOTTOM(isect) + 1,
 114                          r->width, RECT_BOTTOM(*r) - RECT_BOTTOM(isect));
 115                 result = area_add(result, &extra);
 116             }
 117         }
 118
 119         g_free(r);
 120     }
 121     g_slist_free(list);
 122     return result;
 123 }
 124
 125 static gint area_cmp(gconstpointer p1, gconstpointer p2)
 126 {
 127     gint ret;
 128     const Rect *a1 = p1, *a2 = p2;
 129
 130     ret = RECT_TOP(*a1) - RECT_TOP(*a2);
 131     if (!ret)
 132         ret = RECT_LEFT(*a1) - RECT_LEFT(*a2);
 133     return ret;
 134 }
 135
 136 static gboolean place_smart(ObClient *client, gint *x, gint *y)
 137 {
 138     guint i;
 139     gboolean ret = FALSE;
 140     GSList *spaces = NULL, *sit;
 141     GList *it, *list;
 142
 143     list = focus_order[client->desktop == DESKTOP_ALL ?
 144                        screen_desktop : client->desktop];
 145
 146     for (i = 0; i < screen_num_monitors; ++i)
 147         spaces = area_add(spaces, screen_area_monitor(client->desktop, i));
 148
 149     for (it = list; it; it = g_list_next(it)) {
 150         ObClient *c = it->data;
 151
 152         if (c != client && !c->shaded && client_normal(c)) {
 153             spaces = area_remove(spaces, &c->frame->area);
 154             break;
 155         }
 156     }
 157
 158     spaces = g_slist_sort(spaces, area_cmp);
 159
 160     for (sit = spaces; sit; sit = g_slist_next(sit)) {
 161         Rect *r = sit->data;
 162
 163         if (!ret) {
 164             if (r->width >= client->frame->area.width &&
 165                 r->height >= client->frame->area.height) {
 166                 ret = TRUE;
 167                 *x = r->x + (r->width - client->frame->area.width) / 2;
 168                 *y = r->y + (r->height - client->frame->area.height) / 2;
 169             }
 170         }
 171
 172         g_free(r);
 173     }
 174     g_slist_free(spaces);
 175
 176     return ret;
 177 }
 178
 179 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 180 {
 181     guint i;
 182     gint l, r, t, b;
 183     gint px, py;
 184     Rect *area;
 185
 186     screen_pointer_pos(&px, &py);
 187
 188     for (i = 0; i < screen_num_monitors; ++i) {
 189         area = screen_area_monitor(client->desktop, i);
 190         if (RECT_CONTAINS(*area, px, py))
 191             break;
 192     }
 193     if (i == screen_num_monitors)
 194         area = screen_area_monitor(client->desktop, 0);
 195
 196     l = area->x;
 197     t = area->y;
 198     r = area->x + area->width - client->frame->area.width;
 199     b = area->y + area->height - client->frame->area.height;
 200
 201     *x = px - client->area.width / 2 - client->frame->size.left;
 202     *x = MIN(MAX(*x, l), r);
 203     *y = py - client->area.height / 2 - client->frame->size.top;
 204     *y = MIN(MAX(*y, t), b);
 205
 206     return TRUE;
 207 }
 208
 209 static gboolean place_transient(ObClient *client, gint *x, gint *y)
 210 {
 211     if (client->transient_for) {
 212         if (client->transient_for != OB_TRAN_GROUP) {
 213             ObClient *c = client;
 214             ObClient *p = client->transient_for;
 215             *x = (p->frame->area.width - c->frame->area.width) / 2 +
 216                 p->frame->area.x;
 217             *y = (p->frame->area.height - c->frame->area.height) / 2 +
 218                 p->frame->area.y;
 219             return TRUE;
 220         } else {
 221             GSList *it;
 222             gboolean first = TRUE;
 223             int l, r, t, b;
 224             for (it = client->group->members; it; it = it->next) {
 225                 ObClient *m = it->data;
 226                 if (!(m == client || m->transient_for)) {
 227                     if (first) {
 228                         l = RECT_LEFT(m->frame->area);
 229                         t = RECT_TOP(m->frame->area);
 230                         r = RECT_RIGHT(m->frame->area);
 231                         b = RECT_BOTTOM(m->frame->area);
 232                         first = FALSE;
 233                     } else {
 234                         l = MIN(l, RECT_LEFT(m->frame->area));
 235                         t = MIN(t, RECT_TOP(m->frame->area));
 236                         r = MAX(r, RECT_RIGHT(m->frame->area));
 237                         b = MAX(b, RECT_BOTTOM(m->frame->area));
 238                     }
 239                 }
 240             }
 241             if (!first) {
 242                 *x = ((r + 1 - l) - client->frame->area.width) / 2 + l;
 243                 *y = ((b + 1 - t) - client->frame->area.height) / 2 + t;
 244                 return TRUE;
 245             }
 246         }
 247     }
 248     return FALSE;
 249 }
 250
 251 static gboolean place_dialog(ObClient *client, gint *x, gint *y)
 252 {
 253     /* center parentless dialogs on the screen */
 254     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 255         Rect *area;
 256
 257         area = pick_head(client);
 258         if (!area)
 259             area = screen_area_monitor(client->desktop, 0);
 260
 261         *x = (area->width - client->frame->area.width) / 2 + area->x;
 262         *y = (area->height - client->frame->area.height) / 2 + area->y;
 263         return TRUE;
 264     }
 265     return FALSE;
 266 }
 267
 268 void place_client(ObClient *client, gint *x, gint *y)
 269 {
 270     if (client->positioned)
 271         return;
 272     if (place_transient(client, x, y) ||
 273         place_dialog(client, x, y)    ||
 274         place_smart(client, x, y)     ||
 275         (config_focus_follow ?
 276          place_under_mouse(client, x, y) :
 277          place_random(client, x, y)))
 278     {
 279         /* get where the client should be */
 280         frame_frame_gravity(client->frame, x, y);
 281     } else
 282         g_assert_not_reached(); /* the last one better succeed */
 283 }