src/xinerama.c

   1 /*
   2  *  Window Maker window manager
   3  *
   4  *  Copyright (c) 1997-2003 Alfredo K. Kojima
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19  *  USA.
  20  */
  21
  22 #include "wconfig.h"
  23
  24 #include "xinerama.h"
  25
  26 #include "screen.h"
  27 #include "window.h"
  28 #include "framewin.h"
  29 #include "wcore.h"
  30 #include "funcs.h"
  31
  32 #ifdef XINERAMA
  33 # ifdef SOLARIS_XINERAMA        /* sucks */
  34 #  include <X11/extensions/xinerama.h>
  35 # else
  36 #  include <X11/extensions/Xinerama.h>
  37 # endif
  38 #endif
  39
  40 extern WPreferences wPreferences;
  41
  42 void wInitXinerama(WScreen * scr)
  43 {
  44         scr->xine_info.primary_head = 0;
  45         scr->xine_info.screens = NULL;
  46         scr->xine_info.count = 0;
  47 #ifdef XINERAMA
  48 # ifdef SOLARIS_XINERAMA
  49         if (XineramaGetState(dpy, scr->screen)) {
  50                 WXineramaInfo *info = &scr->xine_info;
  51                 XRectangle head[MAXFRAMEBUFFERS];
  52                 unsigned char hints[MAXFRAMEBUFFERS];
  53                 int i;
  54
  55                 if (XineramaGetInfo(dpy, scr->screen, head, hints, &info->count)) {
  56
  57                         info->screens = wmalloc(sizeof(WMRect) * (info->count + 1));
  58
  59                         for (i = 0; i < info->count; i++) {
  60                                 info->screens[i].pos.x = head[i].x;
  61                                 info->screens[i].pos.y = head[i].y;
  62                                 info->screens[i].size.width = head[i].width;
  63                                 info->screens[i].size.height = head[i].height;
  64                         }
  65                 }
  66         }
  67 # else                          /* !SOLARIS_XINERAMA */
  68         if (XineramaIsActive(dpy)) {
  69                 XineramaScreenInfo *xine_screens;
  70                 WXineramaInfo *info = &scr->xine_info;
  71                 int i;
  72
  73                 xine_screens = XineramaQueryScreens(dpy, &info->count);
  74
  75                 info->screens = wmalloc(sizeof(WMRect) * (info->count + 1));
  76
  77                 for (i = 0; i < info->count; i++) {
  78                         info->screens[i].pos.x = xine_screens[i].x_org;
  79                         info->screens[i].pos.y = xine_screens[i].y_org;
  80                         info->screens[i].size.width = xine_screens[i].width;
  81                         info->screens[i].size.height = xine_screens[i].height;
  82                 }
  83                 XFree(xine_screens);
  84         }
  85 # endif                         /* !SOLARIS_XINERAMA */
  86 #endif                          /* XINERAMA */
  87 }
  88
  89 int wGetRectPlacementInfo(WScreen * scr, WMRect rect, int *flags)
  90 {
  91         int best;
  92         unsigned long area, totalArea;
  93         int i;
  94         int rx = rect.pos.x;
  95         int ry = rect.pos.y;
  96         int rw = rect.size.width;
  97         int rh = rect.size.height;
  98
  99         wassertrv(flags != NULL, 0);
 100
 101         best = -1;
 102         area = 0;
 103         totalArea = 0;
 104
 105         *flags = XFLAG_NONE;
 106
 107         if (scr->xine_info.count <= 1) {
 108                 unsigned long a;
 109
 110                 a = calcIntersectionArea(rx, ry, rw, rh, 0, 0, scr->scr_width, scr->scr_height);
 111
 112                 if (a == 0) {
 113                         *flags |= XFLAG_DEAD;
 114                 } else if (a != rw * rh) {
 115                         *flags |= XFLAG_PARTIAL;
 116                 }
 117
 118                 return scr->xine_info.primary_head;
 119         }
 120
 121         for (i = 0; i < wXineramaHeads(scr); i++) {
 122                 unsigned long a;
 123
 124                 a = calcIntersectionArea(rx, ry, rw, rh,
 125                                          scr->xine_info.screens[i].pos.x,
 126                                          scr->xine_info.screens[i].pos.y,
 127                                          scr->xine_info.screens[i].size.width,
 128                                          scr->xine_info.screens[i].size.height);
 129
 130                 totalArea += a;
 131                 if (a > area) {
 132                         if (best != -1)
 133                                 *flags |= XFLAG_MULTIPLE;
 134                         area = a;
 135                         best = i;
 136                 }
 137         }
 138
 139         if (best == -1) {
 140                 *flags |= XFLAG_DEAD;
 141                 best = wGetHeadForPointerLocation(scr);
 142         } else if (totalArea != rw * rh)
 143                 *flags |= XFLAG_PARTIAL;
 144
 145         return best;
 146 }
 147
 148 /* get the head that covers most of the rectangle */
 149 int wGetHeadForRect(WScreen * scr, WMRect rect)
 150 {
 151         int best;
 152         unsigned long area;
 153         int i;
 154         int rx = rect.pos.x;
 155         int ry = rect.pos.y;
 156         int rw = rect.size.width;
 157         int rh = rect.size.height;
 158
 159         if (!scr->xine_info.count)
 160                 return scr->xine_info.primary_head;
 161
 162         best = -1;
 163         area = 0;
 164
 165         for (i = 0; i < wXineramaHeads(scr); i++) {
 166                 unsigned long a;
 167
 168                 a = calcIntersectionArea(rx, ry, rw, rh,
 169                                          scr->xine_info.screens[i].pos.x,
 170                                          scr->xine_info.screens[i].pos.y,
 171                                          scr->xine_info.screens[i].size.width,
 172                                          scr->xine_info.screens[i].size.height);
 173
 174                 if (a > area) {
 175                         area = a;
 176                         best = i;
 177                 }
 178         }
 179
 180         /*
 181          * in case rect is in dead space, return valid head
 182          */
 183         if (best == -1)
 184                 best = wGetHeadForPointerLocation(scr);
 185
 186         return best;
 187 }
 188
 189 Bool wWindowTouchesHead(WWindow * wwin, int head)
 190 {
 191         WScreen *scr;
 192         WMRect rect;
 193         int a;
 194
 195         if (!wwin || !wwin->frame)
 196                 return False;
 197
 198         scr = wwin->screen_ptr;
 199         rect = wGetRectForHead(scr, head);
 200         a = calcIntersectionArea(wwin->frame_x, wwin->frame_y,
 201                                  wwin->frame->core->width,
 202                                  wwin->frame->core->height,
 203                                  rect.pos.x, rect.pos.y, rect.size.width, rect.size.height);
 204
 205         return (a != 0);
 206 }
 207
 208 int wGetHeadForWindow(WWindow * wwin)
 209 {
 210         WMRect rect;
 211
 212         if (wwin == NULL || wwin->frame == NULL)
 213                 return 0;
 214
 215         rect.pos.x = wwin->frame_x;
 216         rect.pos.y = wwin->frame_y;
 217         rect.size.width = wwin->frame->core->width;
 218         rect.size.height = wwin->frame->core->height;
 219
 220         return wGetHeadForRect(wwin->screen_ptr, rect);
 221 }
 222
 223 /*
 224 int
 225 wGetHeadForPoint(WScreen *scr, WMPoint point, int *flags)
 226 {
 227     int i;
 228
 229     // paranoia
 230     if (flags == NULL) {
 231         static int tmp;
 232         flags = &tmp;
 233     }
 234     *flags = XFLAG_NONE;
 235
 236     for (i = 0; i < scr->xine_info.count; i++) {
 237 #if 0
 238         int yy, xx;
 239
 240         xx = scr->xine_info.screens[i].pos.x + scr->xine_info.screens[i].size.width;
 241         yy = scr->xine_info.screens[i].pos.y + scr->xine_info.screens[i].size.height;
 242         if (point.x >= scr->xine_info.screens[i].pos.x &&
 243             point.y >= scr->xine_info.screens[i].pos.y &&
 244             point.x < xx && point.y < yy) {
 245             return i;
 246         }
 247 #else
 248         XineramaScreenInfo *xsi = &scr->xine_info.screens[i];
 249
 250         if ((unsigned)(point.x - xsi->x_org) < xsi->width &&
 251             (unsigned)(point.y - xsi->y_org) < xsi->height)
 252             return i;
 253 #endif
 254     }
 255
 256     *flags |= XFLAG_DEAD;
 257
 258     return scr->xine_primary_head;
 259 }
 260 */
 261
 262 int wGetHeadForPoint(WScreen * scr, WMPoint point)
 263 {
 264         int i;
 265
 266         for (i = 0; i < scr->xine_info.count; i++) {
 267                 WMRect *rect = &scr->xine_info.screens[i];
 268
 269                 if ((unsigned)(point.x - rect->pos.x) < rect->size.width &&
 270                     (unsigned)(point.y - rect->pos.y) < rect->size.height)
 271                         return i;
 272         }
 273         return scr->xine_info.primary_head;
 274 }
 275
 276 int wGetHeadForPointerLocation(WScreen * scr)
 277 {
 278         WMPoint point;
 279         Window bla;
 280         int ble;
 281         unsigned int blo;
 282
 283         if (!scr->xine_info.count)
 284                 return scr->xine_info.primary_head;
 285
 286         if (!XQueryPointer(dpy, scr->root_win, &bla, &bla, &point.x, &point.y, &ble, &ble, &blo))
 287                 return scr->xine_info.primary_head;
 288
 289         return wGetHeadForPoint(scr, point);
 290 }
 291
 292 /* get the dimensions of the head */
 293 WMRect wGetRectForHead(WScreen * scr, int head)
 294 {
 295         WMRect rect;
 296
 297         if (head < scr->xine_info.count) {
 298                 rect.pos.x = scr->xine_info.screens[head].pos.x;
 299                 rect.pos.y = scr->xine_info.screens[head].pos.y;
 300                 rect.size.width = scr->xine_info.screens[head].size.width;
 301                 rect.size.height = scr->xine_info.screens[head].size.height;
 302         } else {
 303                 rect.pos.x = 0;
 304                 rect.pos.y = 0;
 305                 rect.size.width = scr->scr_width;
 306                 rect.size.height = scr->scr_height;
 307         }
 308
 309         return rect;
 310 }
 311
 312 WArea wGetUsableAreaForHead(WScreen * scr, int head, WArea * totalAreaPtr, Bool noicons)
 313 {
 314         WArea totalArea, usableArea;
 315         WMRect rect = wGetRectForHead(scr, head);
 316
 317         totalArea.x1 = rect.pos.x;
 318         totalArea.y1 = rect.pos.y;
 319         totalArea.x2 = totalArea.x1 + rect.size.width;
 320         totalArea.y2 = totalArea.y1 + rect.size.height;
 321
 322         if (totalAreaPtr != NULL)
 323                 *totalAreaPtr = totalArea;
 324
 325         if (head < wXineramaHeads(scr)) {
 326                 usableArea = noicons ? scr->totalUsableArea[head] : scr->usableArea[head];
 327         } else
 328                 usableArea = totalArea;
 329
 330         return usableArea;
 331 }
 332
 333 WMPoint wGetPointToCenterRectInHead(WScreen * scr, int head, int width, int height)
 334 {
 335         WMPoint p;
 336         WMRect rect = wGetRectForHead(scr, head);
 337
 338         p.x = rect.pos.x + (rect.size.width - width) / 2;
 339         p.y = rect.pos.y + (rect.size.height - height) / 2;
 340
 341         return p;
 342 }