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) 2003-2007   Dana 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 #include "dock.h"
  27 #include "debug.h"
  28 #include "place_overlap.h"
  29
  30 extern ObDock *dock;
  31
  32 static Rect *pick_pointer_head(ObClient *c)
  33 {
  34     return screen_area(c->desktop, screen_monitor_pointer(), NULL);
  35 }
  36
  37 /* use the following priority lists for pick_head()
  38
  39    When a window is being placed in the FOREGROUND, use a monitor chosen in
  40    the following order:
  41    1. per-app settings
  42    2. same monitor as parent
  43    3. primary monitor if placement=PRIMARY
  44       active monitor if placement=ACTIVE
  45       pointer monitor if placement=MOUSE
  46    4. primary monitor
  47    5. other monitors where the window has group members on the same desktop
  48    6. other monitors where the window has group members on other desktops
  49    7. other monitors
  50
  51    When a window is being placed in the BACKGROUND, use a monitor chosen in the
  52    following order:
  53    1. per-app settings
  54    2. same monitor as parent
  55    3. other monitors where the window has group members on the same desktop
  56     3a. primary monitor in this set
  57     3b. other monitors in this set
  58    4. other monitors where the window has group members on other desktops
  59     4a. primary monitor in this set
  60     4b. other monitors in this set
  61    5. other monitors
  62     5a. primary monitor in this set
  63     5b. other monitors in this set
  64 */
  65
  66 /*! One for each possible head, used to sort them in order of precedence. */
  67 typedef struct {
  68     guint monitor;
  69     guint flags;
  70 } ObPlaceHead;
  71
  72 /*! Flags for ObPlaceHead */
  73 enum {
  74     HEAD_PARENT = 1 << 0, /* parent's monitor */
  75     HEAD_PLACED = 1 << 1, /* chosen monitor by placement */
  76     HEAD_PRIMARY = 1 << 2, /* primary monitor */
  77     HEAD_GROUP_DESK = 1 << 3, /* has a group member on the same desktop */
  78     HEAD_GROUP = 1 << 4, /* has a group member on another desktop */
  79     HEAD_PERAPP = 1 << 5, /* chosen by per-app settings */
  80 };
  81
  82 gint cmp_foreground(const void *a, const void *b)
  83 {
  84     const ObPlaceHead *h1 = a;
  85     const ObPlaceHead *h2 = b;
  86     gint i = 0;
  87
  88     if (h1->monitor == h2->monitor) return 0;
  89
  90     if (h1->flags & HEAD_PERAPP) --i;
  91     if (h2->flags & HEAD_PERAPP) ++i;
  92     if (i) return i;
  93
  94     if (h1->flags & HEAD_PARENT) --i;
  95     if (h2->flags & HEAD_PARENT) ++i;
  96     if (i) return i;
  97
  98     if (h1->flags & HEAD_PLACED) --i;
  99     if (h2->flags & HEAD_PLACED) ++i;
 100     if (i) return i;
 101
 102     if (h1->flags & HEAD_PRIMARY) --i;
 103     if (h2->flags & HEAD_PRIMARY) ++i;
 104     if (i) return i;
 105
 106     if (h1->flags & HEAD_GROUP_DESK) --i;
 107     if (h2->flags & HEAD_GROUP_DESK) ++i;
 108     if (i) return i;
 109
 110     if (h1->flags & HEAD_GROUP) --i;
 111     if (h2->flags & HEAD_GROUP) ++i;
 112     if (i) return i;
 113
 114     return h1->monitor - h2->monitor;
 115 }
 116
 117 gint cmp_background(const void *a, const void *b)
 118 {
 119     const ObPlaceHead *h1 = a;
 120     const ObPlaceHead *h2 = b;
 121     gint i = 0;
 122
 123     if (h1->monitor == h2->monitor) return 0;
 124
 125     if (h1->flags & HEAD_PERAPP) --i;
 126     if (h2->flags & HEAD_PERAPP) ++i;
 127     if (i) return i;
 128
 129     if (h1->flags & HEAD_PARENT) --i;
 130     if (h2->flags & HEAD_PARENT) ++i;
 131     if (i) return i;
 132
 133     if (h1->flags & HEAD_GROUP_DESK || h2->flags & HEAD_GROUP_DESK) {
 134         if (h1->flags & HEAD_GROUP_DESK) --i;
 135         if (h2->flags & HEAD_GROUP_DESK) ++i;
 136         if (i) return i;
 137         if (h1->flags & HEAD_PRIMARY) --i;
 138         if (h2->flags & HEAD_PRIMARY) ++i;
 139         if (i) return i;
 140     }
 141
 142     if (h1->flags & HEAD_GROUP || h2->flags & HEAD_GROUP) {
 143         if (h1->flags & HEAD_GROUP) --i;
 144         if (h2->flags & HEAD_GROUP) ++i;
 145         if (i) return i;
 146         if (h1->flags & HEAD_PRIMARY) --i;
 147         if (h2->flags & HEAD_PRIMARY) ++i;
 148         if (i) return i;
 149     }
 150
 151     if (h1->flags & HEAD_PRIMARY) --i;
 152     if (h2->flags & HEAD_PRIMARY) ++i;
 153     if (i) return i;
 154
 155     return h1->monitor - h2->monitor;
 156 }
 157
 158 /*! Pick a monitor to place a window on. */
 159 static Rect *pick_head(ObClient *c, gboolean foreground,
 160                        ObAppSettings *settings)
 161 {
 162     Rect *area;
 163     ObPlaceHead *choice;
 164     guint i;
 165     ObClient *p;
 166     GSList *it;
 167
 168     choice = g_new(ObPlaceHead, screen_num_monitors);
 169     for (i = 0; i < screen_num_monitors; ++i) {
 170         choice[i].monitor = i;
 171         choice[i].flags = 0;
 172     }
 173
 174     /* find monitors with group members */
 175     if (c->group) {
 176         for (it = c->group->members; it; it = g_slist_next(it)) {
 177             ObClient *itc = it->data;
 178             if (itc != c) {
 179                 guint m = client_monitor(itc);
 180
 181                 if (m < screen_num_monitors) {
 182                     if (screen_compare_desktops(itc->desktop, c->desktop))
 183                         choice[m].flags |= HEAD_GROUP_DESK;
 184                     else
 185                         choice[m].flags |= HEAD_GROUP;
 186                 }
 187             }
 188         }
 189     }
 190
 191     i = screen_monitor_primary(FALSE);
 192     if (i < screen_num_monitors) {
 193         choice[i].flags |= HEAD_PRIMARY;
 194         if (config_place_monitor == OB_PLACE_MONITOR_PRIMARY)
 195             choice[i].flags |= HEAD_PLACED;
 196         if (settings &&
 197             settings->monitor_type == OB_PLACE_MONITOR_PRIMARY)
 198             choice[i].flags |= HEAD_PERAPP;
 199     }
 200
 201     i = screen_monitor_active();
 202     if (i < screen_num_monitors) {
 203         if (config_place_monitor == OB_PLACE_MONITOR_ACTIVE)
 204             choice[i].flags |= HEAD_PLACED;
 205         if (settings &&
 206             settings->monitor_type == OB_PLACE_MONITOR_ACTIVE)
 207             choice[i].flags |= HEAD_PERAPP;
 208     }
 209
 210     i = screen_monitor_pointer();
 211     if (i < screen_num_monitors) {
 212         if (config_place_monitor == OB_PLACE_MONITOR_MOUSE)
 213             choice[i].flags |= HEAD_PLACED;
 214         if (settings &&
 215             settings->monitor_type == OB_PLACE_MONITOR_MOUSE)
 216             choice[i].flags |= HEAD_PERAPP;
 217     }
 218
 219     if (settings) {
 220         i = settings->monitor - 1;
 221         if (i < screen_num_monitors)
 222             choice[i].flags |= HEAD_PERAPP;
 223     }
 224
 225     /* direct parent takes highest precedence */
 226     if ((p = client_direct_parent(c))) {
 227         i = client_monitor(p);
 228         if (i < screen_num_monitors)
 229             choice[i].flags |= HEAD_PARENT;
 230     }
 231
 232     qsort(choice, screen_num_monitors, sizeof(ObPlaceHead),
 233           foreground ? cmp_foreground : cmp_background);
 234
 235     /* save the areas of the monitors in order of their being chosen */
 236     for (i = 0; i < screen_num_monitors; ++i)
 237     {
 238         ob_debug("placement choice %d is monitor %d", i, choice[i].monitor);
 239         if (choice[i].flags & HEAD_PARENT)
 240             ob_debug("  - parent on monitor");
 241         if (choice[i].flags & HEAD_PLACED)
 242             ob_debug("  - placement choice");
 243         if (choice[i].flags & HEAD_PRIMARY)
 244             ob_debug("  - primary monitor");
 245         if (choice[i].flags & HEAD_GROUP_DESK)
 246             ob_debug("  - group on same desktop");
 247         if (choice[i].flags & HEAD_GROUP)
 248             ob_debug("  - group on other desktop");
 249     }
 250
 251     area = screen_area(c->desktop, choice[0].monitor, NULL);
 252
 253     g_free(choice);
 254
 255     /* return the area for the chosen monitor */
 256     return area;
 257 }
 258
 259 static gboolean place_under_mouse(ObClient *client, gint *x, gint *y)
 260 {
 261     gint l, r, t, b;
 262     gint px, py;
 263     Rect *area;
 264
 265     ob_debug("placing under mouse");
 266
 267     if (!screen_pointer_pos(&px, &py))
 268         return FALSE;
 269     area = pick_pointer_head(client);
 270
 271     l = area->x;
 272     t = area->y;
 273     r = area->x + area->width - client->frame->area.width;
 274     b = area->y + area->height - client->frame->area.height;
 275
 276     *x = px - client->area.width / 2 - client->frame->size.left;
 277     *x = MIN(MAX(*x, l), r);
 278     *y = py - client->area.height / 2 - client->frame->size.top;
 279     *y = MIN(MAX(*y, t), b);
 280
 281     g_slice_free(Rect, area);
 282
 283     return TRUE;
 284 }
 285
 286 static gboolean place_per_app_setting(ObClient *client, Rect *screen,
 287                                       gint *x, gint *y,
 288                                       ObAppSettings *settings)
 289 {
 290     if (!settings || (settings && !settings->pos_given))
 291         return FALSE;
 292
 293     ob_debug("placing by per-app settings");
 294
 295     if (settings->position.x.center)
 296         *x = screen->x + screen->width / 2 - client->area.width / 2;
 297     else if (settings->position.x.opposite)
 298         *x = screen->x + screen->width - client->frame->area.width -
 299             settings->position.x.pos;
 300     else
 301         *x = screen->x + settings->position.x.pos;
 302     if (settings->position.x.denom)
 303         *x = (*x * screen->width) / settings->position.x.denom;
 304
 305     if (settings->position.y.center)
 306         *y = screen->y + screen->height / 2 - client->area.height / 2;
 307     else if (settings->position.y.opposite)
 308         *y = screen->y + screen->height - client->frame->area.height -
 309             settings->position.y.pos;
 310     else
 311         *y = screen->y + settings->position.y.pos;
 312     if (settings->position.y.denom)
 313         *y = (*y * screen->height) / settings->position.y.denom;
 314
 315     return TRUE;
 316 }
 317
 318 static gboolean place_transient_splash(ObClient *client, Rect *area,
 319                                        gint *x, gint *y)
 320 {
 321     if (client->type == OB_CLIENT_TYPE_DIALOG) {
 322         GSList *it;
 323         gboolean first = TRUE;
 324         gint l, r, t, b;
 325
 326         ob_debug("placing dialog");
 327
 328         for (it = client->parents; it; it = g_slist_next(it)) {
 329             ObClient *m = it->data;
 330             if (!m->iconic) {
 331                 if (first) {
 332                     l = RECT_LEFT(m->frame->area);
 333                     t = RECT_TOP(m->frame->area);
 334                     r = RECT_RIGHT(m->frame->area);
 335                     b = RECT_BOTTOM(m->frame->area);
 336                     first = FALSE;
 337                 } else {
 338                     l = MIN(l, RECT_LEFT(m->frame->area));
 339                     t = MIN(t, RECT_TOP(m->frame->area));
 340                     r = MAX(r, RECT_RIGHT(m->frame->area));
 341                     b = MAX(b, RECT_BOTTOM(m->frame->area));
 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
 352     if (client->type == OB_CLIENT_TYPE_DIALOG ||
 353         client->type == OB_CLIENT_TYPE_SPLASH)
 354     {
 355         ob_debug("placing dialog or splash");
 356
 357         *x = (area->width - client->frame->area.width) / 2 + area->x;
 358         *y = (area->height - client->frame->area.height) / 2 + area->y;
 359         return TRUE;
 360     }
 361
 362     return FALSE;
 363 }
 364
 365 static gboolean place_least_overlap(ObClient *c, Rect * const head,
 366                                     gint *x, gint *y)
 367 {
 368     /* Assemble the list of windows that could overlap with @c in the user's
 369        current view. */
 370     GSList* potential_overlap_clients = NULL;
 371     int n_client_rects = 0;
 372
 373     /* if we're "showing desktop", ignore all existing windows */
 374     if (!screen_showing_desktop) {
 375         GList* it;
 376         for (it = client_list; it != NULL; it = g_list_next(it)) {
 377             ObClient* maybe_client = (ObClient*)it->data;
 378             if (maybe_client == c)
 379                 continue;
 380             if (maybe_client->iconic)
 381                 continue;
 382             if (!client_occupies_space(maybe_client))
 383                 continue;
 384             if (c->desktop != DESKTOP_ALL) {
 385                 if (maybe_client->desktop != c->desktop &&
 386                     maybe_client->desktop != DESKTOP_ALL)
 387                     continue;
 388             } else {
 389                 if (maybe_client->desktop != screen_desktop &&
 390                     maybe_client->desktop != DESKTOP_ALL)
 391                     continue;
 392             }
 393
 394             potential_overlap_clients = g_slist_prepend(
 395                 potential_overlap_clients, maybe_client);
 396             n_client_rects += 1;
 397         }
 398     }
 399     Rect client_rects[n_client_rects];
 400     GSList* it;
 401     unsigned int i = 0;
 402     for (it = potential_overlap_clients; it != NULL; it = g_slist_next(it)) {
 403         ObClient* potential_overlap_client = (ObClient*)it->data;
 404         client_rects[i] = potential_overlap_client->frame->area;
 405         i += 1;
 406     }
 407     g_slist_free(potential_overlap_clients);
 408
 409     Point result;
 410     Size req_size;
 411     SIZE_SET(req_size, c->frame->area.width, c->frame->area.height);
 412     place_overlap_find_least_placement(client_rects, n_client_rects, head,
 413                                        &req_size, &result);
 414     *x = result.x;
 415     *y = result.y;
 416
 417     return TRUE;
 418 }
 419
 420 /*! Return TRUE if openbox chose the position for the window, and FALSE if
 421   the application chose it */
 422 gboolean place_client(ObClient *client, gboolean foreground, gint *x, gint *y,
 423                       ObAppSettings *settings)
 424 {
 425     Rect *area;
 426     gboolean ret;
 427
 428     /* per-app settings override program specified position
 429      * but not user specified, unless pos_force is enabled */
 430     if (((client->positioned & USPosition) &&
 431          !(settings && settings->pos_given && settings->pos_force)) ||
 432         ((client->positioned & PPosition) &&
 433          !(settings && settings->pos_given)))
 434         return FALSE;
 435
 436     area = pick_head(client, foreground, settings);
 437
 438     /* try a number of methods */
 439     ret = place_per_app_setting(client, area, x, y, settings) ||
 440         place_transient_splash(client, area, x, y) ||
 441         (config_place_policy == OB_PLACE_POLICY_MOUSE &&
 442          place_under_mouse(client, x, y)) ||
 443         place_least_overlap(client, area, x, y);
 444     g_assert(ret);
 445
 446     g_slice_free(Rect, area);
 447
 448     /* get where the client should be */
 449     frame_frame_gravity(client->frame, x, y);
 450     return TRUE;
 451 }