src/placement.c

   1 /* placement.c - window and icon placement on screen
   2  *
   3  *  Window Maker window manager
   4  *
   5  *  Copyright (c) 1997, 1998 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
  43
  44 extern WPreferences wPreferences;
  45
  46
  47 #define X_ORIGIN(scr) WMAX((scr)->totalUsableArea.x1,\
  48                                 wPreferences.window_place_origin.x)
  49
  50 #define Y_ORIGIN(scr) WMAX((scr)->totalUsableArea.y1,\
  51                                 wPreferences.window_place_origin.y)
  52
  53
  54 /*
  55  * interactive window placement is in moveres.c
  56  */
  57
  58 extern void
  59 InteractivePlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
  60                        unsigned width, unsigned height);
  61
  62
  63 /*
  64  * Returns True if it is an icon and is in this workspace.
  65  */
  66 static Bool
  67 iconPosition(WCoreWindow *wcore, int sx1, int sy1, int sx2, int sy2,
  68              int workspace, int *retX, int *retY)
  69 {
  70     void *parent;
  71     int ok = 0;
  72
  73     parent = wcore->descriptor.parent;
  74
  75     /* if it is an application icon */
  76     if (wcore->descriptor.parent_type == WCLASS_APPICON
  77         && !((WAppIcon*)parent)->docked) {
  78         *retX = ((WAppIcon*)parent)->x_pos;
  79         *retY = ((WAppIcon*)parent)->y_pos;
  80
  81         ok = 1;
  82     } else if (wcore->descriptor.parent_type == WCLASS_MINIWINDOW &&
  83                (((WIcon*)parent)->owner->frame->workspace == workspace
  84                 || IS_OMNIPRESENT(((WIcon*)parent)->owner)
  85                 || wPreferences.sticky_icons)
  86                && ((WIcon*)parent)->mapped) {
  87
  88         *retX = ((WIcon*)parent)->owner->icon_x;
  89         *retY = ((WIcon*)parent)->owner->icon_y;
  90
  91         ok = 1;
  92     } else if (wcore->descriptor.parent_type == WCLASS_WINDOW
  93                && ((WWindow*)parent)->flags.icon_moved
  94                && (((WWindow*)parent)->frame->workspace == workspace
  95                    || IS_OMNIPRESENT((WWindow*)parent)
  96                    || wPreferences.sticky_icons)) {
  97         *retX = ((WWindow*)parent)->icon_x;
  98         *retY = ((WWindow*)parent)->icon_y;
  99
 100         ok = 1;
 101     }
 102
 103
 104     /*
 105      * Check if it is inside the screen.
 106      */
 107     if (ok) {
 108         if (*retX < sx1-wPreferences.icon_size)
 109             ok = 0;
 110         else if (*retX > sx2)
 111             ok = 0;
 112
 113         if (*retY < sy1-wPreferences.icon_size)
 114             ok = 0;
 115         else if (*retY > sy2)
 116             ok = 0;
 117     }
 118
 119     return ok;
 120 }
 121
 122
 123
 124
 125 void
 126 PlaceIcon(WScreen *scr, int *x_ret, int *y_ret)
 127 {
 128     int pf;                            /* primary axis */
 129     int sf;                            /* secondary axis */
 130     int fullW;
 131     int fullH;
 132     char *map;
 133     int pi, si;
 134     WCoreWindow *obj;
 135     int sx1, sx2, sy1, sy2;            /* screen boundary */
 136     int sw, sh;
 137     int xo, yo;
 138     int xs, ys;
 139     int x, y;
 140     int isize = wPreferences.icon_size;
 141     int done = 0;
 142     int level;
 143
 144     /*
 145      * Find out screen boundaries.
 146      */
 147     sx1 = 0;
 148     sy1 = 0;
 149     sx2 = scr->scr_width;
 150     sy2 = scr->scr_height;
 151     if (scr->dock) {
 152         if (scr->dock->on_right_side)
 153             sx2 -= isize + DOCK_EXTRA_SPACE;
 154         else
 155             sx1 += isize + DOCK_EXTRA_SPACE;
 156     }
 157
 158     sw = isize * (scr->scr_width/isize);
 159     sh = isize * (scr->scr_height/isize);
 160     fullW = (sx2-sx1)/isize;
 161     fullH = (sy2-sy1)/isize;
 162
 163     /* icon yard boundaries */
 164     if (wPreferences.icon_yard & IY_VERT) {
 165         pf = fullH;
 166         sf = fullW;
 167     } else {
 168         pf = fullW;
 169         sf = fullH;
 170     }
 171     if (wPreferences.icon_yard & IY_RIGHT) {
 172         xo = sx2 - isize;
 173         xs = -1;
 174     } else {
 175         xo = sx1;
 176         xs = 1;
 177     }
 178     if (wPreferences.icon_yard & IY_TOP) {
 179         yo = sy1;
 180         ys = 1;
 181     } else {
 182         yo = sy2 - isize;
 183         ys = -1;
 184     }
 185
 186     /*
 187      * Create a map with the occupied slots. 1 means the slot is used
 188      * or at least partially used.
 189      * The slot usage can be optimized by only marking fully used slots
 190      * or slots that have most of it covered.
 191      * Space usage is worse than the fvwm algorithm (used in the old version)
 192      * but complexity is much better (faster) than it.
 193      */
 194     map = wmalloc((sw+2) * (sh+2));
 195     memset(map, 0, (sw+2) * (sh+2));
 196
 197 #define INDEX(x,y)      (((y)+1)*(sw+2) + (x) + 1)
 198
 199     for (level = MAX_WINDOW_LEVELS-1; level >= WMDesktopLevel; level--) {
 200         obj = scr->stacking_list[level];
 201
 202         while (obj) {
 203             int x, y;
 204
 205             if (iconPosition(obj, sx1, sy1, sx2, sy2, scr->current_workspace,
 206                              &x, &y)) {
 207                 int xdi, ydi;          /* rounded down */
 208                 int xui, yui;          /* rounded up */
 209
 210                 xdi = x/isize;
 211                 ydi = y/isize;
 212                 xui = (x+isize/2)/isize;
 213                 yui = (y+isize/2)/isize;
 214                 map[INDEX(xdi,ydi)] = 1;
 215                 map[INDEX(xdi,yui)] = 1;
 216                 map[INDEX(xui,ydi)] = 1;
 217                 map[INDEX(xui,yui)] = 1;
 218             }
 219             obj = obj->stacking->under;
 220         }
 221     }
 222     /*
 223      * Default position
 224      */
 225     *x_ret = 0;
 226     *y_ret = 0;
 227
 228     /*
 229      * Look for an empty slot
 230      */
 231     for (si=0; si<sf; si++) {
 232         for (pi=0; pi<pf; pi++) {
 233             if (wPreferences.icon_yard & IY_VERT) {
 234                 x = xo + xs*(si*isize);
 235                 y = yo + ys*(pi*isize);
 236             } else {
 237                 x = xo + xs*(pi*isize);
 238                 y = yo + ys*(si*isize);
 239             }
 240             if (!map[INDEX(x/isize, y/isize)]) {
 241                 *x_ret = x;
 242                 *y_ret = y;
 243                 done = 1;
 244                 break;
 245             }
 246         }
 247         if (done)
 248             break;
 249     }
 250
 251     free(map);
 252 }
 253
 254
 255 /*
 256  * This function calculates the length of the intersection of two
 257  * line sections. (Hey, is that english?)
 258  */
 259 static int
 260 calcIntersectionLength(int p1, int l1, int p2, int l2)
 261 {
 262     int isect;
 263     int tmp;
 264
 265     if (p1 > p2) {
 266         tmp = p1;
 267         p1 = p2;
 268         p2 = tmp;
 269         tmp = l1;
 270         l1 = l2;
 271         l2 = tmp;
 272     }
 273
 274     if (p1 + l1 < p2)
 275         isect = 0;
 276     else if (p2 + l2 < p1 + l1)
 277         isect = l2;
 278     else
 279         isect = p1 + l1 - p2;
 280
 281     return isect;
 282 }
 283
 284
 285 /*
 286  * This function calculates the area of the intersection of two rectangles.
 287  */
 288 static int
 289 calcIntersectionArea(int x1, int y1, int w1, int h1,
 290                                 int x2, int y2, int w2, int h2)
 291 {
 292     return calcIntersectionLength(x1, w1, x2, w2)
 293            * calcIntersectionLength(y1, h1, y2, h2);
 294 }
 295
 296
 297 static int
 298 calcSumOfCoveredAreas(WWindow *wwin, int x, int y, int w, int h)
 299 {
 300     int sum_isect = 0;
 301     WWindow *test_window;
 302     int tw,tx,ty,th;
 303
 304     test_window = wwin->screen_ptr->focused_window;
 305     for(;test_window != NULL && test_window->prev != NULL;)
 306          test_window = test_window->prev;
 307
 308     for(; test_window != NULL; test_window = test_window->next) {
 309         if (test_window->frame->core->stacking->window_level
 310             < WMNormalLevel) {
 311             continue;
 312         }
 313
 314 #if 0
 315         tw = test_window->client.width;
 316         if (test_window->flags.shaded)
 317             th = test_window->frame->top_width;
 318         else
 319             th = test_window->client.height + extra_height;
 320 #else
 321         tw = test_window->frame->core->width;
 322         th = test_window->frame->core->height;
 323 #endif
 324         tx = test_window->frame_x;
 325         ty = test_window->frame_y;
 326
 327         if (test_window->flags.mapped ||
 328             (test_window->flags.shaded &&
 329              !(test_window->flags.miniaturized ||
 330                test_window->flags.hidden))) {
 331             sum_isect += calcIntersectionArea(tx, ty, tw, th, x, y, w, h);
 332         }
 333     }
 334
 335     return sum_isect;
 336 }
 337
 338
 339 static void
 340 smartPlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
 341                  unsigned int width, unsigned int height)
 342 {
 343     WScreen *scr = wwin->screen_ptr;
 344     int test_x = 0, test_y = Y_ORIGIN(scr);
 345     int from_x, to_x, from_y, to_y;
 346     int sx;
 347     int min_isect, min_isect_x, min_isect_y;
 348     int sum_isect;
 349     int extra_height;
 350     WArea usableArea = scr->totalUsableArea;
 351
 352     if (wwin->frame)
 353         extra_height = wwin->frame->top_width + wwin->frame->bottom_width;
 354     else
 355         extra_height = 24; /* random value */
 356
 357     sx = X_ORIGIN(scr);
 358
 359     min_isect = INT_MAX;
 360     min_isect_x = sx;
 361     min_isect_y = test_y;
 362
 363     height += extra_height;
 364
 365     while (((test_y + height) < usableArea.y2)) {
 366
 367         test_x = sx;
 368
 369         while ((test_x + width) < usableArea.x2) {
 370
 371             sum_isect = calcSumOfCoveredAreas(wwin, test_x, test_y,
 372                                               width, height);
 373
 374             if ( sum_isect < min_isect ) {
 375                 min_isect = sum_isect;
 376                 min_isect_x = test_x;
 377                 min_isect_y = test_y;
 378             }
 379
 380             test_x += PLACETEST_HSTEP;
 381         }
 382         test_y += PLACETEST_VSTEP;
 383     }
 384
 385     from_x = min_isect_x - PLACETEST_HSTEP + 1;
 386     from_x = WMAX(from_x, X_ORIGIN(scr));
 387     to_x = min_isect_x + PLACETEST_HSTEP;
 388     if (to_x + width > usableArea.x2)
 389         to_x = usableArea.x2 - width;
 390
 391     from_y = min_isect_y - PLACETEST_VSTEP + 1;
 392     from_y = WMAX(from_y, Y_ORIGIN(scr));
 393     to_y = min_isect_y + PLACETEST_VSTEP;
 394     if (to_y + height > usableArea.y2)
 395         to_y = usableArea.y2 - height;
 396
 397     for (test_x = from_x; test_x < to_x; test_x++) {
 398         for (test_y = from_y; test_y < to_y; test_y++) {
 399             sum_isect = calcSumOfCoveredAreas(wwin, test_x, test_y,
 400                                               width, height);
 401
 402             if ( sum_isect < min_isect ) {
 403                 min_isect = sum_isect;
 404                 min_isect_x = test_x;
 405                 min_isect_y = test_y;
 406             }
 407         }
 408     }
 409
 410     *x_ret = min_isect_x;
 411     *y_ret = min_isect_y;
 412 }
 413
 414
 415 static void
 416 cascadeWindow(WScreen *scr, WWindow *wwin, int *x_ret, int *y_ret,
 417               unsigned int width, unsigned int height, int h)
 418 {
 419     unsigned int extra_height;
 420     WArea usableArea = scr->totalUsableArea;
 421
 422     if (wwin->frame)
 423         extra_height = wwin->frame->top_width + wwin->frame->bottom_width;
 424     else
 425         extra_height = 24; /* random value */
 426
 427     *x_ret = h * scr->cascade_index + X_ORIGIN(scr);
 428     *y_ret = h * scr->cascade_index + Y_ORIGIN(scr);
 429     height += extra_height;
 430
 431     if (width + *x_ret > usableArea.x2 || height + *y_ret > usableArea.y2) {
 432         scr->cascade_index = 0;
 433         *x_ret = X_ORIGIN(scr);
 434         *y_ret = Y_ORIGIN(scr);
 435     }
 436 }
 437
 438
 439 void
 440 PlaceWindow(WWindow *wwin, int *x_ret, int *y_ret,
 441             unsigned width, unsigned height)
 442 {
 443     WScreen *scr = wwin->screen_ptr;
 444     int h = WMFontHeight(scr->title_font) + TITLEBAR_EXTRA_HEIGHT;
 445
 446     switch (wPreferences.window_placement) {
 447      case WPM_MANUAL:
 448         InteractivePlaceWindow(wwin, x_ret, y_ret, width, height);
 449         break;
 450
 451      case WPM_SMART:
 452         smartPlaceWindow(wwin, x_ret, y_ret, width, height);
 453         break;
 454
 455      case WPM_CASCADE:
 456         if (wPreferences.window_placement == WPM_SMART)
 457             scr->cascade_index++;
 458
 459         cascadeWindow(scr, wwin, x_ret, y_ret, width, height, h);
 460
 461         if (wPreferences.window_placement == WPM_CASCADE)
 462             scr->cascade_index++;
 463         break;
 464
 465      case WPM_RANDOM:
 466         {
 467             int w, h, extra_height;
 468             WArea usableArea = scr->totalUsableArea;
 469
 470             if (wwin->frame)
 471                 extra_height = wwin->frame->top_width + wwin->frame->bottom_width + 2;
 472             else
 473                 extra_height = 24; /* random value */
 474
 475             w = ((usableArea.x2-X_ORIGIN(scr)) - width);
 476             h = ((usableArea.y2-Y_ORIGIN(scr)) - height - extra_height);
 477             if (w<1) w = 1;
 478             if (h<1) h = 1;
 479             *x_ret = X_ORIGIN(scr) + rand()%w;
 480             *y_ret = Y_ORIGIN(scr) + rand()%h;
 481         }
 482         break;
 483
 484 #ifdef DEBUG
 485      default:
 486         puts("Invalid window placement!!!");
 487         *x_ret = 0;
 488         *y_ret = 0;
 489 #endif
 490     }
 491
 492     if (*x_ret + width > scr->scr_width)
 493         *x_ret = scr->scr_width - width;
 494     if (*x_ret < 0)
 495         *x_ret = 0;
 496
 497     if (*y_ret + height > scr->scr_height)
 498         *y_ret = scr->scr_height - height;
 499     if (*y_ret < 0)
 500         *y_ret = 0;
 501 }
 502
 503