openbox/resist.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    resist.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 "resist.h"
  21 #include "client.h"
  22 #include "engine_interface.h"
  23 #include "stacking.h"
  24 #include "screen.h"
  25 #include "dock.h"
  26 #include "config.h"
  27 #include "openbox.h"
  28
  29 #include <glib.h>
  30
  31 static gboolean resist_move_window(Rect window,
  32                                    Rect target, gint resist,
  33                                    gint *x, gint *y)
  34 {
  35     gint l, t, r, b; /* requested edges */
  36     gint cl, ct, cr, cb; /* current edges */
  37     gint w, h; /* current size */
  38     gint tl, tt, tr, tb; /* 1 past the target's edges on each side */
  39     gboolean snapx = 0, snapy = 0;
  40
  41     w = window.width;
  42     h = window.height;
  43
  44     l = *x;
  45     t = *y;
  46     r = l + w - 1;
  47     b = t + h - 1;
  48
  49     cl = RECT_LEFT(window);
  50     ct = RECT_TOP(window);
  51     cr = RECT_RIGHT(window);
  52     cb = RECT_BOTTOM(window);
  53
  54     tl = RECT_LEFT(target) - 1;
  55     tt = RECT_TOP(target) - 1;
  56     tr = RECT_RIGHT(target) + 1;
  57     tb = RECT_BOTTOM(target) + 1;
  58
  59     /* snapx and snapy ensure that the window snaps to the top-most
  60        window edge available, without going all the way from
  61        bottom-to-top in the stacking list
  62     */
  63     if (!snapx) {
  64         if (ct < tb && cb > tt) {
  65             if (cl >= tr && l < tr && l >= tr - resist)
  66                 *x = tr, snapx = TRUE;
  67             else if (cr <= tl && r > tl &&
  68                      r <= tl + resist)
  69                 *x = tl - w + 1, snapx = TRUE;
  70             if (snapx) {
  71                 /* try to corner snap to the window */
  72                 if (ct > tt && t <= tt &&
  73                     t > tt - resist)
  74                     *y = tt + 1, snapy = TRUE;
  75                 else if (cb < tb && b >= tb &&
  76                          b < tb + resist)
  77                     *y = tb - h, snapy = TRUE;
  78             }
  79         }
  80     }
  81     if (!snapy) {
  82         if (cl < tr && cr > tl) {
  83             if (ct >= tb && t < tb && t >= tb - resist)
  84                 *y = tb, snapy = TRUE;
  85             else if (cb <= tt && b > tt &&
  86                      b <= tt + resist)
  87                 *y = tt - h + 1, snapy = TRUE;
  88             if (snapy) {
  89                 /* try to corner snap to the window */
  90                 if (cl > tl && l <= tl &&
  91                     l > tl - resist)
  92                     *x = tl + 1, snapx = TRUE;
  93                 else if (cr < tr && r >= tr &&
  94                          r < tr + resist)
  95                     *x = tr - w, snapx = TRUE;
  96             }
  97         }
  98     }
  99
 100     return snapx && snapy;
 101 }
 102
 103 void resist_move_windows(ObClient *c, gint resist, gint *x, gint *y)
 104 {
 105     GList *it;
 106     Rect dock_area;
 107
 108     Rect c_area = frame_engine->frame_get_window_area(c->frame);
 109
 110     if (!resist) return;
 111
 112     frame_client_gravity(c, x, y);
 113
 114     for (it = stacking_list; it; it = g_list_next(it)) {
 115         ObClient *target;
 116
 117         if (!WINDOW_IS_CLIENT(it->data))
 118             continue;
 119         target = it->data;
 120
 121         /* don't snap to self or non-visibles */
 122         if (!frame_engine->frame_is_visible(target->frame) || target == c)
 123             continue;
 124         /* don't snap to windows set to below and skip_taskbar (desklets) */
 125         if (target->below && !c->below && target->skip_taskbar)
 126             continue;
 127
 128         Rect target_area = frame_engine->frame_get_window_area(target->frame);
 129         if (resist_move_window(c_area, target_area,
 130                                resist, x, y))
 131             break;
 132     }
 133     dock_get_area(&dock_area);
 134     resist_move_window(c_area, dock_area, resist, x, y);
 135
 136     frame_frame_gravity(c, x, y);
 137 }
 138
 139 void resist_move_monitors(ObClient *c, gint resist, gint *x, gint *y)
 140 {
 141     Rect *area, *parea;
 142     guint i;
 143     gint l, t, r, b; /* requested edges */
 144     gint al, at, ar, ab; /* screen area edges */
 145     gint pl, pt, pr, pb; /* physical screen area edges */
 146     gint cl, ct, cr, cb; /* current edges */
 147     gint w, h; /* current size */
 148     Rect desired_area;
 149
 150     Rect c_area = frame_engine->frame_get_window_area(c->frame);
 151
 152     if (!resist) return;
 153
 154     frame_client_gravity(c, x, y);
 155
 156     w = c_area.width;
 157     h = c_area.height;
 158
 159     l = *x;
 160     t = *y;
 161     r = l + w - 1;
 162     b = t + h - 1;
 163
 164     cl = RECT_LEFT(c_area);
 165     ct = RECT_TOP(c_area);
 166     cr = RECT_RIGHT(c_area);
 167     cb = RECT_BOTTOM(c_area);
 168
 169     RECT_SET(desired_area, *x, *y, c->area.width, c->area.height);
 170
 171     for (i = 0; i < screen_num_monitors; ++i) {
 172         parea = screen_physical_area_monitor(i);
 173
 174         if (!RECT_INTERSECTS_RECT(*parea, c_area)) {
 175             g_free(parea);
 176             continue;
 177         }
 178
 179         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
 180                            &desired_area);
 181
 182         al = RECT_LEFT(*area);
 183         at = RECT_TOP(*area);
 184         ar = RECT_RIGHT(*area);
 185         ab = RECT_BOTTOM(*area);
 186         pl = RECT_LEFT(*parea);
 187         pt = RECT_TOP(*parea);
 188         pr = RECT_RIGHT(*parea);
 189         pb = RECT_BOTTOM(*parea);
 190
 191         if (cl >= al && l < al && l >= al - resist)
 192             *x = al;
 193         else if (cr <= ar && r > ar && r <= ar + resist)
 194             *x = ar - w + 1;
 195         else if (cl >= pl && l < pl && l >= pl - resist)
 196             *x = pl;
 197         else if (cr <= pr && r > pr && r <= pr + resist)
 198             *x = pr - w + 1;
 199
 200         if (ct >= at && t < at && t >= at - resist)
 201             *y = at;
 202         else if (cb <= ab && b > ab && b < ab + resist)
 203             *y = ab - h + 1;
 204         else if (ct >= pt && t < pt && t >= pt - resist)
 205             *y = pt;
 206         else if (cb <= pb && b > pb && b < pb + resist)
 207             *y = pb - h + 1;
 208
 209         g_free(area);
 210         g_free(parea);
 211     }
 212
 213     frame_frame_gravity(c, x, y);
 214 }
 215
 216 static gboolean resist_size_window(Rect window, Rect target, gint resist,
 217                                    gint *w, gint *h, ObDirection dir)
 218 {
 219     gint l, t, r, b; /* my left, top, right and bottom sides */
 220     gint tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides*/
 221     gint dlt, drb; /* my destination left/top and right/bottom sides */
 222     gboolean snapx = 0, snapy = 0;
 223     gint orgw, orgh;
 224
 225     l = RECT_LEFT(window);
 226     t = RECT_TOP(window);
 227     r = RECT_RIGHT(window);
 228     b = RECT_BOTTOM(window);
 229
 230     orgw = window.width;
 231     orgh = window.height;
 232
 233     tl = RECT_LEFT(target);
 234     tt = RECT_TOP(target);
 235     tr = RECT_RIGHT(target);
 236     tb = RECT_BOTTOM(target);
 237
 238     if (!snapx) {
 239         /* horizontal snapping */
 240         if (t < tb && b > tt) {
 241             switch (dir) {
 242             case OB_DIRECTION_EAST:
 243             case OB_DIRECTION_NORTHEAST:
 244             case OB_DIRECTION_SOUTHEAST:
 245             case OB_DIRECTION_NORTH:
 246             case OB_DIRECTION_SOUTH:
 247                 dlt = l;
 248                 drb = r + *w - orgw;
 249                 if (r < tl && drb >= tl &&
 250                     drb < tl + resist)
 251                     *w = tl - l, snapx = TRUE;
 252                 break;
 253             case OB_DIRECTION_WEST:
 254             case OB_DIRECTION_NORTHWEST:
 255             case OB_DIRECTION_SOUTHWEST:
 256                 dlt = l - *w + orgw;
 257                 drb = r;
 258                 if (l > tr && dlt <= tr &&
 259                     dlt > tr - resist)
 260                     *w = r - tr, snapx = TRUE;
 261                 break;
 262             }
 263         }
 264     }
 265
 266     if (!snapy) {
 267         /* vertical snapping */
 268         if (l < tr && r > tl) {
 269             switch (dir) {
 270             case OB_DIRECTION_SOUTH:
 271             case OB_DIRECTION_SOUTHWEST:
 272             case OB_DIRECTION_SOUTHEAST:
 273             case OB_DIRECTION_EAST:
 274             case OB_DIRECTION_WEST:
 275                 dlt = t;
 276                 drb = b + *h - orgh;
 277                 if (b < tt && drb >= tt &&
 278                     drb < tt + resist)
 279                     *h = tt - t, snapy = TRUE;
 280                 break;
 281             case OB_DIRECTION_NORTH:
 282             case OB_DIRECTION_NORTHWEST:
 283             case OB_DIRECTION_NORTHEAST:
 284                 dlt = t - *h + orgh;
 285                 drb = b;
 286                 if (t > tb && dlt <= tb &&
 287                     dlt > tb - resist)
 288                     *h = b - tb, snapy = TRUE;
 289                 break;
 290             }
 291         }
 292     }
 293
 294     /* snapped both ways */
 295     return snapx && snapy;
 296 }
 297
 298 void resist_size_windows(ObClient *c, gint resist, gint *w, gint *h,
 299                          ObDirection dir)
 300 {
 301     GList *it;
 302     ObClient *target; /* target */
 303     Rect dock_area;
 304
 305     Rect c_area = frame_engine->frame_get_window_area(c->frame);
 306     if (!resist) return;
 307
 308     for (it = stacking_list; it; it = g_list_next(it)) {
 309         if (!WINDOW_IS_CLIENT(it->data))
 310             continue;
 311         target = it->data;
 312
 313         /* don't snap to invisibles or ourself */
 314         if (!frame_engine->frame_is_visible(target->frame) || target == c)
 315             continue;
 316         /* don't snap to windows set to below and skip_taskbar (desklets) */
 317         if (target->below && !c->below && target->skip_taskbar)
 318             continue;
 319
 320         Rect target_area = frame_engine->frame_get_window_area(target->frame);
 321         if (resist_size_window(c_area, target_area,
 322                                resist, w, h, dir))
 323             break;
 324     }
 325     dock_get_area(&dock_area);
 326     resist_size_window(c_area, dock_area,
 327                        resist, w, h, dir);
 328 }
 329
 330 void resist_size_monitors(ObClient *c, gint resist, gint *w, gint *h,
 331                           ObDirection dir)
 332 {
 333     gint l, t, r, b; /* my left, top, right and bottom sides */
 334     gint dlt, drb; /* my destination left/top and right/bottom sides */
 335     Rect *area, *parea;
 336     gint al, at, ar, ab; /* screen boundaries */
 337     gint pl, pt, pr, pb; /* physical screen boundaries */
 338     gint incw, inch;
 339     guint i;
 340     Rect desired_area;
 341
 342     Rect c_area = frame_engine->frame_get_window_area(c->frame);
 343
 344     if (!resist) return;
 345
 346     l = RECT_LEFT(c_area);
 347     r = RECT_RIGHT(c_area);
 348     t = RECT_TOP(c_area);
 349     b = RECT_BOTTOM(c_area);
 350
 351     incw = c->size_inc.width;
 352     inch = c->size_inc.height;
 353
 354     RECT_SET(desired_area, c->area.x, c->area.y, *w, *h);
 355
 356     for (i = 0; i < screen_num_monitors; ++i) {
 357         parea = screen_physical_area_monitor(i);
 358
 359         if (!RECT_INTERSECTS_RECT(*parea, c_area)) {
 360             g_free(parea);
 361             continue;
 362         }
 363
 364         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
 365                            &desired_area);
 366
 367         /* get the screen boundaries */
 368         al = RECT_LEFT(*area);
 369         at = RECT_TOP(*area);
 370         ar = RECT_RIGHT(*area);
 371         ab = RECT_BOTTOM(*area);
 372         pl = RECT_LEFT(*parea);
 373         pt = RECT_TOP(*parea);
 374         pr = RECT_RIGHT(*parea);
 375         pb = RECT_BOTTOM(*parea);
 376
 377         /* horizontal snapping */
 378         switch (dir) {
 379         case OB_DIRECTION_EAST:
 380         case OB_DIRECTION_NORTHEAST:
 381         case OB_DIRECTION_SOUTHEAST:
 382         case OB_DIRECTION_NORTH:
 383         case OB_DIRECTION_SOUTH:
 384             dlt = l;
 385             drb = r + *w - c_area.width;
 386             if (r <= ar && drb > ar && drb <= ar + resist)
 387                 *w = ar - l + 1;
 388             else if (r <= pr && drb > pr && drb <= pr + resist)
 389                 *w = pr - l + 1;
 390             break;
 391         case OB_DIRECTION_WEST:
 392         case OB_DIRECTION_NORTHWEST:
 393         case OB_DIRECTION_SOUTHWEST:
 394             dlt = l - *w + c_area.width;
 395             drb = r;
 396             if (l >= al && dlt < al && dlt >= al - resist)
 397                 *w = r - al + 1;
 398             else if (l >= pl && dlt < pl && dlt >= pl - resist)
 399                 *w = r - pl + 1;
 400             break;
 401         }
 402
 403         /* vertical snapping */
 404         switch (dir) {
 405         case OB_DIRECTION_SOUTH:
 406         case OB_DIRECTION_SOUTHWEST:
 407         case OB_DIRECTION_SOUTHEAST:
 408         case OB_DIRECTION_WEST:
 409         case OB_DIRECTION_EAST:
 410             dlt = t;
 411             drb = b + *h - c_area.height;
 412             if (b <= ab && drb > ab && drb <= ab + resist)
 413                 *h = ab - t + 1;
 414             else if (b <= pb && drb > pb && drb <= pb + resist)
 415                 *h = pb - t + 1;
 416             break;
 417         case OB_DIRECTION_NORTH:
 418         case OB_DIRECTION_NORTHWEST:
 419         case OB_DIRECTION_NORTHEAST:
 420             dlt = t - *h + c_area.height;
 421             drb = b;
 422             if (t >= at && dlt < at && dlt >= at - resist)
 423                 *h = b - at + 1;
 424             else if (t >= pt && dlt < pt && dlt >= pt - resist)
 425                 *h = b - pt + 1;
 426             break;
 427         }
 428
 429         g_free(area);
 430         g_free(parea);
 431     }
 432 }