src/placement.c

   1 /* placement.c - window and icon placement on screen
   2  *
   3  *  Window Maker window manager
   4  *
   5  *  Copyright (c) 1997-2002 Alfredo K. Kojima
   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  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20  *  USA.
  21  */
  22
  23 #include "wconfig.h"
  24
  25 #include <X11/Xlib.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <limits.h>
  30
  31 #include "WindowMaker.h"
  32 #include "wcore.h"
  33 #include "framewin.h"
  34 #include "window.h"
  35 #include "icon.h"
  36 #include "appicon.h"
  37 #include "actions.h"
  38 #include "funcs.h"
  39 #include "application.h"
  40 #include "appicon.h"
  41 #include "dock.h"
  42 #include "xinerama.h"
  43
  44
  45 extern WPreferences wPreferences;
  46
  47
  48 #define X_ORIGIN(scr) WMAX((scr)->totalUsableArea.x1,\
  49                                 wPreferences.window_place_origin.x)
  50
  51 #define Y_ORIGIN(scr) WMAX((scr)->totalUsableArea.y1,\
  52                                 wPreferences.window_place_origin.y)
  53
  54
  55 /*
  56  * interactive window placement is in moveres.c
  57  */
  58
  59 extern void
  60 InteractivePlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
  61                        unsigned width, unsigned height);
  62
  63
  64 /*
  65  * Returns True if it is an icon and is in this workspace.
  66  */
  67 static Bool
  68 iconPosition(WCoreWindow *wcore, int sx1, int sy1, int sx2, int sy2,
  69              int workspace, int *retX, int *retY)
  70 {
  71     void *parent;
  72     int ok = 0;
  73
  74     parent = wcore->descriptor.parent;
  75
  76     /* if it is an application icon */
  77     if (wcore->descriptor.parent_type == WCLASS_APPICON
  78         && !((WAppIcon*)parent)->docked) {
  79         *retX = ((WAppIcon*)parent)->x_pos;
  80         *retY = ((WAppIcon*)parent)->y_pos;
  81
  82         ok = 1;
  83     } else if (wcore->descriptor.parent_type == WCLASS_MINIWINDOW &&
  84                (((WIcon*)parent)->owner->frame->workspace == workspace
  85                 || IS_OMNIPRESENT(((WIcon*)parent)->owner)
  86                 || wPreferences.sticky_icons)
  87                && ((WIcon*)parent)->mapped) {
  88
  89         *retX = ((WIcon*)parent)->owner->icon_x;
  90         *retY = ((WIcon*)parent)->owner->icon_y;
  91
  92         ok = 1;
  93     } else if (wcore->descriptor.parent_type == WCLASS_WINDOW
  94                && ((WWindow*)parent)->flags.icon_moved
  95                && (((WWindow*)parent)->frame->workspace == workspace
  96                    || IS_OMNIPRESENT((WWindow*)parent)
  97                    || wPreferences.sticky_icons)) {
  98         *retX = ((WWindow*)parent)->icon_x;
  99         *retY = ((WWindow*)parent)->icon_y;
 100
 101         ok = 1;
 102     }
 103
 104
 105     /*
 106      * Check if it is inside the screen.
 107      */
 108     if (ok) {
 109         if (*retX < sx1-wPreferences.icon_size)
 110             ok = 0;
 111         else if (*retX > sx2)
 112             ok = 0;
 113
 114         if (*retY < sy1-wPreferences.icon_size)
 115             ok = 0;
 116         else if (*retY > sy2)
 117             ok = 0;
 118     }
 119
 120     return ok;
 121 }
 122
 123
 124
 125
 126 void
 127 PlaceIcon(WScreen *scr, int *x_ret, int *y_ret)
 128 {
 129     int pf;                            /* primary axis */
 130     int sf;                            /* secondary axis */
 131     int fullW;
 132     int fullH;
 133     char *map;
 134     int pi, si;
 135     WCoreWindow *obj;
 136     int sx1, sx2, sy1, sy2;            /* screen boundary */
 137     int sw, sh;
 138     int xo, yo;
 139     int xs, ys;
 140     int x, y;
 141     int isize = wPreferences.icon_size;
 142     int done = 0;
 143     WMBagIterator iter;
 144     /*
 145      * Find out screen boundaries.
 146      */
 147
 148     /*
 149      * Allows each head to have miniwindows
 150      */
 151     WMRect rect = wGetRectForHead(scr, wGetHeadForPointerLocation(scr));
 152
 153     sx1 = rect.pos.x;
 154     sy1 = rect.pos.y;
 155     sw = rect.size.width;
 156     sh = rect.size.height;
 157     sx2 = sx1 + sw;
 158     sy2 = sy1 + sh;
 159
 160     if (scr->dock) {
 161         if (scr->dock->on_right_side)
 162             sx2 -= isize + DOCK_EXTRA_SPACE;
 163         else
 164             sx1 += isize + DOCK_EXTRA_SPACE;
 165     }
 166
 167     sw = isize * (sw/isize);
 168     sh = isize * (sh/isize);
 169     fullW = (sx2-sx1)/isize;
 170     fullH = (sy2-sy1)/isize;
 171
 172     /* icon yard boundaries */
 173     if (wPreferences.icon_yard & IY_VERT) {
 174         pf = fullH;
 175         sf = fullW;
 176     } else {
 177         pf = fullW;
 178         sf = fullH;
 179     }
 180     if (wPreferences.icon_yard & IY_RIGHT) {
 181         xo = sx2 - isize;
 182         xs = -1;
 183     } else {
 184         xo = sx1;
 185         xs = 1;
 186     }
 187     if (wPreferences.icon_yard & IY_TOP) {
 188         yo = sy1;
 189         ys = 1;
 190     } else {
 191         yo = sy2 - isize;
 192         ys = -1;
 193     }
 194
 195     /*
 196      * Create a map with the occupied slots. 1 means the slot is used
 197      * or at least partially used.
 198      * The slot usage can be optimized by only marking fully used slots
 199      * or slots that have most of it covered.
 200      * Space usage is worse than the fvwm algorithm (used in the old version)
 201      * but complexity is much better (faster) than it.
 202      */
 203     map = wmalloc((sw+2) * (sh+2));
 204     memset(map, 0, (sw+2) * (sh+2));
 205
 206 #define INDEX(x,y)      (((y)+1)*(sw+2) + (x) + 1)
 207
 208     WM_ETARETI_BAG(scr->stacking_list, obj, iter) {
 209
 210         while (obj) {
 211             int x, y;
 212
 213             if (iconPosition(obj, sx1, sy1, sx2, sy2, scr->current_workspace,
 214                              &x, &y)) {
 215                 int xdi, ydi;          /* rounded down */
 216                 int xui, yui;          /* rounded up */
 217
 218                 xdi = x/isize;
 219                 ydi = y/isize;
 220                 xui = (x+isize/2)/isize;
 221                 yui = (y+isize/2)/isize;
 222                 map[INDEX(xdi,ydi)] = 1;
 223                 map[INDEX(xdi,yui)] = 1;
 224                 map[INDEX(xui,ydi)] = 1;
 225                 map[INDEX(xui,yui)] = 1;
 226             }
 227             obj = obj->stacking->under;
 228         }
 229     }
 230     /*
 231      * Default position
 232      */
 233     *x_ret = 0;
 234     *y_ret = 0;
 235
 236     /*
 237      * Look for an empty slot
 238      */
 239     for (si=0; si<sf; si++) {
 240         for (pi=0; pi<pf; pi++) {
 241             if (wPreferences.icon_yard & IY_VERT) {
 242                 x = xo + xs*(si*isize);
 243                 y = yo + ys*(pi*isize);
 244             } else {
 245                 x = xo + xs*(pi*isize);
 246                 y = yo + ys*(si*isize);
 247             }
 248             if (!map[INDEX(x/isize, y/isize)]) {
 249                 *x_ret = x;
 250                 *y_ret = y;
 251                 done = 1;
 252                 break;
 253             }
 254         }
 255         if (done)
 256             break;
 257     }
 258
 259     wfree(map);
 260 }
 261
 262
 263 /*
 264  * This function calculates the length of the intersection of two
 265  * line sections. (Hey, is that english?)
 266  */
 267 static int
 268 calcIntersectionLength(int p1, int l1, int p2, int l2)
 269 {
 270     int isect;
 271     int tmp;
 272
 273     if (p1 > p2) {
 274         tmp = p1;
 275         p1 = p2;
 276         p2 = tmp;
 277         tmp = l1;
 278         l1 = l2;
 279         l2 = tmp;
 280     }
 281
 282     if (p1 + l1 < p2)
 283         isect = 0;
 284     else if (p2 + l2 < p1 + l1)
 285         isect = l2;
 286     else
 287         isect = p1 + l1 - p2;
 288
 289     return isect;
 290 }
 291
 292
 293 /*
 294  * This function calculates the area of the intersection of two rectangles.
 295  */
 296
 297 int
 298 calcIntersectionArea(int x1, int y1, int w1, int h1,
 299                      int x2, int y2, int w2, int h2)
 300 {
 301     return calcIntersectionLength(x1, w1, x2, w2)
 302            * calcIntersectionLength(y1, h1, y2, h2);
 303 }
 304
 305
 306 static int
 307 calcSumOfCoveredAreas(WWindow *wwin, int x, int y, int w, int h)
 308 {
 309     int sum_isect = 0;
 310     WWindow *test_window;
 311     int tw,tx,ty,th;
 312
 313     test_window = wwin->screen_ptr->focused_window;
 314     for(;test_window != NULL && test_window->prev != NULL;)
 315          test_window = test_window->prev;
 316
 317     for(; test_window != NULL; test_window = test_window->next) {
 318         if (test_window->frame->core->stacking->window_level
 319             < WMNormalLevel) {
 320             continue;
 321         }
 322
 323 #if 0
 324         tw = test_window->client.width;
 325         if (test_window->flags.shaded)
 326             th = test_window->frame->top_width;
 327         else
 328             th = test_window->client.height + extra_height;
 329 #else
 330         tw = test_window->frame->core->width;
 331         th = test_window->frame->core->height;
 332 #endif
 333         tx = test_window->frame_x;
 334         ty = test_window->frame_y;
 335
 336         if (test_window->flags.mapped ||
 337             (test_window->flags.shaded &&
 338              !(test_window->flags.miniaturized ||
 339                test_window->flags.hidden))) {
 340             sum_isect += calcIntersectionArea(tx, ty, tw, th, x, y, w, h);
 341         }
 342     }
 343
 344     return sum_isect;
 345 }
 346
 347
 348 static void
 349 smartPlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
 350                  unsigned int width, unsigned int height,
 351                  WArea usableArea)
 352 {
 353     WScreen *scr = wwin->screen_ptr;
 354     int test_x = 0, test_y = Y_ORIGIN(scr);
 355     int from_x, to_x, from_y, to_y;
 356     int sx;
 357     int min_isect, min_isect_x, min_isect_y;
 358     int sum_isect;
 359     int extra_height;
 360
 361     if (wwin->frame)
 362         extra_height = wwin->frame->top_width + wwin->frame->bottom_width;
 363     else
 364         extra_height = 24; /* random value */
 365
 366     sx = X_ORIGIN(scr);
 367
 368     min_isect = INT_MAX;
 369     min_isect_x = sx;
 370     min_isect_y = test_y;
 371
 372     height += extra_height;
 373
 374     while (((test_y + height) < usableArea.y2)) {
 375
 376         test_x = sx;
 377
 378         while ((test_x + width) < usableArea.x2) {
 379
 380             sum_isect = calcSumOfCoveredAreas(wwin, test_x, test_y,
 381                                               width, height);
 382
 383             if ( sum_isect < min_isect ) {
 384                 min_isect = sum_isect;
 385                 min_isect_x = test_x;
 386                 min_isect_y = test_y;
 387             }
 388
 389             test_x += PLACETEST_HSTEP;
 390         }
 391         test_y += PLACETEST_VSTEP;
 392     }
 393
 394     from_x = min_isect_x - PLACETEST_HSTEP + 1;
 395     from_x = WMAX(from_x, X_ORIGIN(scr));
 396     to_x = min_isect_x + PLACETEST_HSTEP;
 397     if (to_x + width > usableArea.x2)
 398         to_x = usableArea.x2 - width;
 399
 400     from_y = min_isect_y - PLACETEST_VSTEP + 1;
 401     from_y = WMAX(from_y, Y_ORIGIN(scr));
 402     to_y = min_isect_y + PLACETEST_VSTEP;
 403     if (to_y + height > usableArea.y2)
 404         to_y = usableArea.y2 - height;
 405
 406     for (test_x = from_x; test_x < to_x; test_x++) {
 407         for (test_y = from_y; test_y < to_y; test_y++) {
 408             sum_isect = calcSumOfCoveredAreas(wwin, test_x, test_y,
 409                                               width, height);
 410
 411             if ( sum_isect < min_isect ) {
 412                 min_isect = sum_isect;
 413                 min_isect_x = test_x;
 414                 min_isect_y = test_y;
 415             }
 416         }
 417     }
 418
 419     *x_ret = min_isect_x;
 420     *y_ret = min_isect_y;
 421 }
 422
 423
 424 static Bool
 425 autoPlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
 426                 unsigned int width, unsigned int height, int tryCount,
 427                 WArea usableArea)
 428 {
 429     WScreen *scr = wwin->screen_ptr;
 430     int test_x = 0, test_y = Y_ORIGIN(scr);
 431     int loc_ok = False, tw,tx,ty,th;
 432     int swidth, sx;
 433     WWindow *test_window;
 434     int extra_height;
 435
 436
 437     if (wwin->frame)
 438         extra_height = wwin->frame->top_width + wwin->frame->bottom_width + 2;
 439     else
 440         extra_height = 24; /* random value */
 441
 442     swidth = usableArea.x2-usableArea.x1;
 443     sx = X_ORIGIN(scr);
 444
 445     /* this was based on fvwm2's smart placement */
 446
 447     height += extra_height;
 448
 449     while (((test_y + height) < (usableArea.y2 - usableArea.y1)) && !loc_ok) {
 450         test_x = sx;
 451
 452         while (((test_x + width) < swidth) && (!loc_ok)) {
 453
 454             loc_ok = True;
 455             test_window = scr->focused_window;
 456
 457             while ((test_window != NULL) && (loc_ok == True)) {
 458
 459                 if (test_window->frame->core->stacking->window_level
 460                     < WMNormalLevel && tryCount > 0) {
 461                     test_window = test_window->next;
 462                     continue;
 463                 }
 464 #if 0
 465                 tw = test_window->client.width;
 466                 if (test_window->flags.shaded)
 467                     th = test_window->frame->top_width;
 468                 else
 469                     th = test_window->client.height + extra_height;
 470 #else
 471                 tw = test_window->frame->core->width;
 472                 th = test_window->frame->core->height;
 473 #endif
 474                 tx = test_window->frame_x;
 475                 ty = test_window->frame_y;
 476
 477                 if ((tx < (test_x + width)) && ((tx + tw) > test_x) &&
 478                     (ty < (test_y + height)) && ((ty + th) > test_y) &&
 479                     (test_window->flags.mapped ||
 480                      (test_window->flags.shaded &&
 481                       test_window->frame->workspace==scr->current_workspace &&
 482                       !(test_window->flags.miniaturized ||
 483                         test_window->flags.hidden)))) {
 484
 485                     loc_ok = False;
 486                 }
 487                 test_window = test_window->next;
 488             }
 489
 490             test_window = scr->focused_window;
 491
 492             while ((test_window != NULL) && (loc_ok == True))  {
 493
 494                 if (test_window->frame->core->stacking->window_level
 495                     < WMNormalLevel && tryCount > 0) {
 496                     test_window = test_window->prev;
 497                     continue;
 498                 }
 499 #if 0
 500                 tw = test_window->client.width;
 501                 if (test_window->flags.shaded)
 502                     th = test_window->frame->top_width;
 503                 else
 504                     th = test_window->client.height + extra_height;
 505 #else
 506                 tw = test_window->frame->core->width;
 507                 th = test_window->frame->core->height;
 508 #endif
 509                 tx = test_window->frame_x;
 510                 ty = test_window->frame_y;
 511
 512                 if ((tx < (test_x + width)) && ((tx + tw) > test_x) &&
 513                     (ty < (test_y + height)) && ((ty + th) > test_y) &&
 514                     (test_window->flags.mapped ||
 515                      (test_window->flags.shaded &&
 516                       test_window->frame->workspace==scr->current_workspace &&
 517                       !(test_window->flags.miniaturized ||
 518                         test_window->flags.hidden)))) {
 519
 520                     loc_ok = False;
 521                 }
 522                 test_window = test_window->prev;
 523             }
 524             if (loc_ok == True) {
 525                 *x_ret = test_x;
 526                 *y_ret = test_y;
 527                 break;
 528             }
 529             test_x += PLACETEST_HSTEP;
 530         }
 531         test_y += PLACETEST_VSTEP;
 532     }
 533
 534     return loc_ok;
 535 }
 536
 537
 538 static void
 539 cascadeWindow(WScreen *scr, WWindow *wwin, int *x_ret, int *y_ret,
 540               unsigned int width, unsigned int height, int h,
 541               WArea usableArea)
 542 {
 543     unsigned int extra_height;
 544
 545
 546     if (wwin->frame)
 547         extra_height = wwin->frame->top_width + wwin->frame->bottom_width;
 548     else
 549         extra_height = 24; /* random value */
 550
 551     *x_ret = h * scr->cascade_index + X_ORIGIN(scr);
 552     *y_ret = h * scr->cascade_index + Y_ORIGIN(scr);
 553     height += extra_height;
 554
 555     if (width + *x_ret > usableArea.x2 || height + *y_ret > usableArea.y2) {
 556         scr->cascade_index = 0;
 557         *x_ret = X_ORIGIN(scr);
 558         *y_ret = Y_ORIGIN(scr);
 559     }
 560 }
 561
 562
 563 static void
 564 randomPlaceWindow(WScreen *scr, WWindow *wwin, int *x_ret, int *y_ret,
 565                   unsigned int width, unsigned int height,
 566                   WArea usableArea)
 567 {
 568     int w, h, extra_height;
 569
 570     if (wwin->frame)
 571         extra_height = wwin->frame->top_width + wwin->frame->bottom_width + 2;
 572     else
 573         extra_height = 24; /* random value */
 574
 575     w = ((usableArea.x2-X_ORIGIN(scr)) - width);
 576     h = ((usableArea.y2-Y_ORIGIN(scr)) - height - extra_height);
 577     if (w<1) w = 1;
 578     if (h<1) h = 1;
 579     *x_ret = X_ORIGIN(scr) + rand()%w;
 580     *y_ret = Y_ORIGIN(scr) + rand()%h;
 581 }
 582
 583
 584
 585 void
 586 PlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
 587             unsigned width, unsigned height)
 588 {
 589     WScreen *scr = wwin->screen_ptr;
 590     int h = WMFontHeight(scr->title_font) + (wPreferences.window_title_clearance + TITLEBAR_EXTEND_SPACE) * 2;
 591     WArea usableArea = wGetUsableAreaForHead(scr,
 592                                              wGetHeadForPointerLocation(scr),
 593                                              NULL);
 594
 595     switch (wPreferences.window_placement) {
 596      case WPM_MANUAL:
 597         InteractivePlaceWindow(wwin, x_ret, y_ret, width, height);
 598         break;
 599
 600      case WPM_SMART:
 601         smartPlaceWindow(wwin, x_ret, y_ret, width, height, usableArea);
 602         break;
 603
 604      case WPM_AUTO:
 605         if (autoPlaceWindow(wwin, x_ret, y_ret, width, height, 0,
 606                             usableArea)) {
 607             break;
 608         } else if (autoPlaceWindow(wwin, x_ret, y_ret, width, height, 1,
 609                                    usableArea)) {
 610             break;
 611         }
 612         /* there isn't a break here, because if we fail, it should fall
 613            through to cascade placement, as people who want tiling want
 614            automagicness aren't going to want to place their window */
 615
 616      case WPM_CASCADE:
 617         if (wPreferences.window_placement == WPM_AUTO)
 618             scr->cascade_index++;
 619
 620         cascadeWindow(scr, wwin, x_ret, y_ret, width, height, h, usableArea);
 621
 622         if (wPreferences.window_placement == WPM_CASCADE)
 623             scr->cascade_index++;
 624         break;
 625
 626      case WPM_RANDOM:
 627         randomPlaceWindow(scr, wwin, x_ret, y_ret, width, height, usableArea);
 628         break;
 629
 630 #ifdef DEBUG
 631      default:
 632         puts("Invalid window placement!!!");
 633         *x_ret = 0;
 634         *y_ret = 0;
 635 #endif
 636     }
 637
 638     /*
 639      * clip to usableArea instead of full screen
 640      * this will also take dock/clip etc.. into account
 641      * aswell as being xinerama friendly
 642      */
 643     if (*x_ret + width > usableArea.x2)
 644         *x_ret = usableArea.x2 - width;
 645     if (*x_ret < usableArea.x1)
 646         *x_ret = usableArea.x1;
 647
 648     if (*y_ret + height > usableArea.y2)
 649         *y_ret = usableArea.y2 - height;
 650     if (*y_ret < usableArea.y1)
 651         *y_ret = usableArea.y1;
 652 }
 653
 654