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 "dock.h"
  25 #include "config.h"
  26 #include "resist.h"
  27 #include "parser/parse.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     if (!resist) return;
 109
 110     frame_client_gravity(c->frame, x, y);
 111
 112
 113     for (it = stacking_list; it; it = g_list_next(it)) {
 114         ObClient *target;
 115
 116         if (!WINDOW_IS_CLIENT(it->data))
 117             continue;
 118         target = it->data;
 119
 120         /* don't snap to self or non-visibles */
 121         if (!target->frame->visible || target == c)
 122             continue;
 123         /* don't snap to windows set to below and skip_taskbar (desklets) */
 124         if (target->below && !c->below && target->skip_taskbar)
 125             continue;
 126
 127         if (resist_move_window(c->frame->area, target->frame->area,
 128                                resist, x, y))
 129             break;
 130     }
 131     dock_get_area(&dock_area);
 132     resist_move_window(c->frame->area, dock_area, resist, x, y);
 133
 134     frame_frame_gravity(c->frame, x, y);
 135 }
 136
 137 void resist_move_monitors(ObClient *c, gint resist, gint *x, gint *y)
 138 {
 139     Rect *area, *parea;
 140     guint i;
 141     gint l, t, r, b; /* requested edges */
 142     gint al, at, ar, ab; /* screen area edges */
 143     gint pl, pt, pr, pb; /* physical screen area edges */
 144     gint cl, ct, cr, cb; /* current edges */
 145     gint w, h; /* current size */
 146     Rect desired_area;
 147
 148     if (!resist) return;
 149
 150     frame_client_gravity(c->frame, x, y);
 151
 152     w = c->frame->area.width;
 153     h = c->frame->area.height;
 154
 155     l = *x;
 156     t = *y;
 157     r = l + w - 1;
 158     b = t + h - 1;
 159
 160     cl = RECT_LEFT(c->frame->area);
 161     ct = RECT_TOP(c->frame->area);
 162     cr = RECT_RIGHT(c->frame->area);
 163     cb = RECT_BOTTOM(c->frame->area);
 164
 165     RECT_SET(desired_area, c->frame->area.x, c->frame->area.y,
 166              c->frame->area.width, c->frame->area.height);
 167
 168     for (i = 0; i < screen_num_monitors; ++i) {
 169         parea = screen_physical_area_monitor(i);
 170
 171         if (!RECT_INTERSECTS_RECT(*parea, c->frame->area)) {
 172             g_free(parea);
 173             continue;
 174         }
 175
 176         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
 177                            &desired_area);
 178
 179         al = RECT_LEFT(*area);
 180         at = RECT_TOP(*area);
 181         ar = RECT_RIGHT(*area);
 182         ab = RECT_BOTTOM(*area);
 183         pl = RECT_LEFT(*parea);
 184         pt = RECT_TOP(*parea);
 185         pr = RECT_RIGHT(*parea);
 186         pb = RECT_BOTTOM(*parea);
 187
 188         if (cl >= al && l < al && l >= al - resist)
 189             *x = al;
 190         else if (cr <= ar && r > ar && r <= ar + resist)
 191             *x = ar - w + 1;
 192         else if (cl >= pl && l < pl && l >= pl - resist)
 193             *x = pl;
 194         else if (cr <= pr && r > pr && r <= pr + resist)
 195             *x = pr - w + 1;
 196
 197         if (ct >= at && t < at && t >= at - resist)
 198             *y = at;
 199         else if (cb <= ab && b > ab && b < ab + resist)
 200             *y = ab - h + 1;
 201         else if (ct >= pt && t < pt && t >= pt - resist)
 202             *y = pt;
 203         else if (cb <= pb && b > pb && b < pb + resist)
 204             *y = pb - h + 1;
 205
 206         g_free(area);
 207         g_free(parea);
 208     }
 209
 210     frame_frame_gravity(c->frame, x, y);
 211 }
 212
 213 static gboolean resist_size_window(Rect window, Rect target, gint resist,
 214                                    gint *w, gint *h, ObDirection dir)
 215 {
 216     gint l, t, r, b; /* my left, top, right and bottom sides */
 217     gint tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides*/
 218     gint dlt, drb; /* my destination left/top and right/bottom sides */
 219     gboolean snapx = 0, snapy = 0;
 220     gint orgw, orgh;
 221
 222     l = RECT_LEFT(window);
 223     t = RECT_TOP(window);
 224     r = RECT_RIGHT(window);
 225     b = RECT_BOTTOM(window);
 226
 227     orgw = window.width;
 228     orgh = window.height;
 229
 230     tl = RECT_LEFT(target);
 231     tt = RECT_TOP(target);
 232     tr = RECT_RIGHT(target);
 233     tb = RECT_BOTTOM(target);
 234
 235     if (!snapx) {
 236         /* horizontal snapping */
 237         if (t < tb && b > tt) {
 238             switch (dir) {
 239             case OB_DIRECTION_EAST:
 240             case OB_DIRECTION_NORTHEAST:
 241             case OB_DIRECTION_SOUTHEAST:
 242             case OB_DIRECTION_NORTH:
 243             case OB_DIRECTION_SOUTH:
 244                 dlt = l;
 245                 drb = r + *w - orgw;
 246                 if (r < tl && drb >= tl &&
 247                     drb < tl + resist)
 248                     *w = tl - l, snapx = TRUE;
 249                 break;
 250             case OB_DIRECTION_WEST:
 251             case OB_DIRECTION_NORTHWEST:
 252             case OB_DIRECTION_SOUTHWEST:
 253                 dlt = l - *w + orgw;
 254                 drb = r;
 255                 if (l > tr && dlt <= tr &&
 256                     dlt > tr - resist)
 257                     *w = r - tr, snapx = TRUE;
 258                 break;
 259             }
 260         }
 261     }
 262
 263     if (!snapy) {
 264         /* vertical snapping */
 265         if (l < tr && r > tl) {
 266             switch (dir) {
 267             case OB_DIRECTION_SOUTH:
 268             case OB_DIRECTION_SOUTHWEST:
 269             case OB_DIRECTION_SOUTHEAST:
 270             case OB_DIRECTION_EAST:
 271             case OB_DIRECTION_WEST:
 272                 dlt = t;
 273                 drb = b + *h - orgh;
 274                 if (b < tt && drb >= tt &&
 275                     drb < tt + resist)
 276                     *h = tt - t, snapy = TRUE;
 277                 break;
 278             case OB_DIRECTION_NORTH:
 279             case OB_DIRECTION_NORTHWEST:
 280             case OB_DIRECTION_NORTHEAST:
 281                 dlt = t - *h + orgh;
 282                 drb = b;
 283                 if (t > tb && dlt <= tb &&
 284                     dlt > tb - resist)
 285                     *h = b - tb, snapy = TRUE;
 286                 break;
 287             }
 288         }
 289     }
 290
 291     /* snapped both ways */
 292     return snapx && snapy;
 293 }
 294
 295 void resist_size_windows(ObClient *c, gint resist, gint *w, gint *h,
 296                          ObDirection dir)
 297 {
 298     GList *it;
 299     ObClient *target; /* target */
 300     Rect dock_area;
 301
 302     if (!resist) return;
 303
 304     for (it = stacking_list; it; it = g_list_next(it)) {
 305         if (!WINDOW_IS_CLIENT(it->data))
 306             continue;
 307         target = it->data;
 308
 309         /* don't snap to invisibles or ourself */
 310         if (!target->frame->visible || target == c)
 311             continue;
 312         /* don't snap to windows set to below and skip_taskbar (desklets) */
 313         if (target->below && !c->below && target->skip_taskbar)
 314             continue;
 315
 316         if (resist_size_window(c->frame->area, target->frame->area,
 317                                resist, w, h, dir))
 318             break;
 319     }
 320     dock_get_area(&dock_area);
 321     resist_size_window(c->frame->area, dock_area,
 322                        resist, w, h, dir);
 323 }
 324
 325 void resist_size_monitors(ObClient *c, gint resist, gint *w, gint *h,
 326                           ObDirection dir)
 327 {
 328     gint l, t, r, b; /* my left, top, right and bottom sides */
 329     gint dlt, drb; /* my destination left/top and right/bottom sides */
 330     Rect *area, *parea;
 331     gint al, at, ar, ab; /* screen boundaries */
 332     gint pl, pt, pr, pb; /* physical screen boundaries */
 333     gint incw, inch;
 334     guint i;
 335     Rect desired_area;
 336
 337     if (!resist) return;
 338
 339     l = RECT_LEFT(c->frame->area);
 340     r = RECT_RIGHT(c->frame->area);
 341     t = RECT_TOP(c->frame->area);
 342     b = RECT_BOTTOM(c->frame->area);
 343
 344     incw = c->size_inc.width;
 345     inch = c->size_inc.height;
 346
 347     RECT_SET(desired_area, c->area.x, c->area.y, *w, *h);
 348
 349     for (i = 0; i < screen_num_monitors; ++i) {
 350         parea = screen_physical_area_monitor(i);
 351
 352         if (!RECT_INTERSECTS_RECT(*parea, c->frame->area)) {
 353             g_free(parea);
 354             continue;
 355         }
 356
 357         area = screen_area(c->desktop, SCREEN_AREA_ALL_MONITORS,
 358                            &desired_area);
 359
 360         /* get the screen boundaries */
 361         al = RECT_LEFT(*area);
 362         at = RECT_TOP(*area);
 363         ar = RECT_RIGHT(*area);
 364         ab = RECT_BOTTOM(*area);
 365         pl = RECT_LEFT(*parea);
 366         pt = RECT_TOP(*parea);
 367         pr = RECT_RIGHT(*parea);
 368         pb = RECT_BOTTOM(*parea);
 369
 370         /* horizontal snapping */
 371         switch (dir) {
 372         case OB_DIRECTION_EAST:
 373         case OB_DIRECTION_NORTHEAST:
 374         case OB_DIRECTION_SOUTHEAST:
 375         case OB_DIRECTION_NORTH:
 376         case OB_DIRECTION_SOUTH:
 377             dlt = l;
 378             drb = r + *w - c->frame->area.width;
 379             if (r <= ar && drb > ar && drb <= ar + resist)
 380                 *w = ar - l + 1;
 381             else if (r <= pr && drb > pr && drb <= pr + resist)
 382                 *w = pr - l + 1;
 383             break;
 384         case OB_DIRECTION_WEST:
 385         case OB_DIRECTION_NORTHWEST:
 386         case OB_DIRECTION_SOUTHWEST:
 387             dlt = l - *w + c->frame->area.width;
 388             drb = r;
 389             if (l >= al && dlt < al && dlt >= al - resist)
 390                 *w = r - al + 1;
 391             else if (l >= pl && dlt < pl && dlt >= pl - resist)
 392                 *w = r - pl + 1;
 393             break;
 394         }
 395
 396         /* vertical snapping */
 397         switch (dir) {
 398         case OB_DIRECTION_SOUTH:
 399         case OB_DIRECTION_SOUTHWEST:
 400         case OB_DIRECTION_SOUTHEAST:
 401         case OB_DIRECTION_WEST:
 402         case OB_DIRECTION_EAST:
 403             dlt = t;
 404             drb = b + *h - c->frame->area.height;
 405             if (b <= ab && drb > ab && drb <= ab + resist)
 406                 *h = ab - t + 1;
 407             else if (b <= pb && drb > pb && drb <= pb + resist)
 408                 *h = pb - t + 1;
 409             break;
 410         case OB_DIRECTION_NORTH:
 411         case OB_DIRECTION_NORTHWEST:
 412         case OB_DIRECTION_NORTHEAST:
 413             dlt = t - *h + c->frame->area.height;
 414             drb = b;
 415             if (t >= at && dlt < at && dlt >= at - resist)
 416                 *h = b - at + 1;
 417             else if (t >= pt && dlt < pt && dlt >= pt - resist)
 418                 *h = b - pt + 1;
 419             break;
 420         }
 421
 422         g_free(area);
 423         g_free(parea);
 424     }
 425 }