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