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