screen.c

   1 /*
   2  * screen.c - screen management
   3  *
   4  * Copyright © 2007 Julien Danjou <julien@danjou.info>
   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 along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <X11/extensions/Xinerama.h>
  23
  24 #include "screen.h"
  25 #include "tag.h"
  26 #include "focus.h"
  27 #include "client.h"
  28 #include "layouts/floating.h"
  29 #include "common/util.h"
  30
  31 extern AwesomeConf globalconf;
  32
  33 /** Get screens info
  34  * \param screen Screen number
  35  * \param statusbar statusbar
  36  * \param padding Padding
  37  * \return Area
  38  */
  39 Area
  40 get_screen_area(int screen, Statusbar *statusbar, Padding *padding)
  41 {
  42     Area area;
  43     Statusbar *sb;
  44
  45     area = globalconf.screens[screen].geometry;
  46
  47     /* make padding corrections */
  48     if(padding)
  49     {
  50         area.x += padding->left;
  51         area.y += padding->top;
  52         area.width -= padding->left + padding->right;
  53         area.height -= padding->top + padding->bottom;
  54     }
  55
  56     for(sb = statusbar; sb; sb = sb->next)
  57         switch(sb->position)
  58         {
  59           case Top:
  60             area.y += sb->height;
  61           case Bottom:
  62             area.height -= sb->height;
  63             break;
  64           case Left:
  65             area.x += sb->height;
  66           case Right:
  67             area.width -= sb->height;
  68             break;
  69           case Off:
  70             break;
  71         }
  72
  73     return area;
  74 }
  75
  76 /** Get display info
  77  * \param screen Screen number
  78  * \param statusbar the statusbar
  79  * \param padding Padding
  80  * \return Area
  81  */
  82 Area
  83 get_display_area(int screen, Statusbar *statusbar, Padding *padding)
  84 {
  85     Area area = { 0, 0, 0, 0, NULL };
  86     Statusbar *sb;
  87
  88     area.width = DisplayWidth(globalconf.display, screen);
  89     area.height = DisplayHeight(globalconf.display, screen);
  90
  91     for(sb = statusbar; sb; sb = sb->next)
  92     {
  93         area.y += sb->position == Top ? sb->height : 0;
  94         area.height -= (sb->position == Top || sb->position == Bottom) ? sb->height : 0;
  95     }
  96
  97     /* make padding corrections */
  98     if(padding)
  99     {
 100             area.x += padding->left;
 101             area.y += padding->top;
 102             area.width -= padding->left + padding->right;
 103             area.height -= padding->top + padding->bottom;
 104     }
 105     return area;
 106 }
 107
 108 /** Return the Xinerama screen number where the coordinates belongs to
 109  * \param x x coordinate of the window
 110  * \param y y coordinate of the window
 111  * \return screen number or DefaultScreen of disp on no match
 112  */
 113 int
 114 get_screen_bycoord(int x, int y)
 115 {
 116     int i;
 117     Area area;
 118
 119     /* don't waste our time */
 120     if(!XineramaIsActive(globalconf.display))
 121         return DefaultScreen(globalconf.display);
 122
 123     for(i = 0; i < globalconf.nscreen; i++)
 124     {
 125         area = get_screen_area(i, NULL, NULL);
 126         if((x < 0 || (x >= area.x && x < area.x + area.width))
 127            && (y < 0 || (y >= area.y && y < area.y + area.height)))
 128             return i;
 129     }
 130     return DefaultScreen(globalconf.display);
 131 }
 132
 133
 134 static inline Area
 135 screen_xsi_to_area(XineramaScreenInfo si)
 136 {
 137     Area a;
 138
 139     a.x = si.x_org;
 140     a.y = si.y_org;
 141     a.width = si.width;
 142     a.height = si.height;
 143     a.next = NULL;
 144
 145     return a;
 146 }
 147
 148 void
 149 screen_build_screens(void)
 150 {
 151     XineramaScreenInfo *si;
 152     int xinerama_screen_number, screen, screen_to_test;
 153     Bool drop;
 154
 155     if(XineramaIsActive(globalconf.display))
 156     {
 157         si = XineramaQueryScreens(globalconf.display, &xinerama_screen_number);
 158         globalconf.screens = p_new(VirtScreen, xinerama_screen_number);
 159         globalconf.nscreen = 0;
 160
 161         /* now check if screens overlaps (same x,y): if so, we take only the biggest one */
 162         for(screen = 0; screen < xinerama_screen_number; screen++)
 163         {
 164             drop = False;
 165             for(screen_to_test = 0; screen_to_test < globalconf.nscreen; screen_to_test++)
 166                 if(si[screen].x_org == globalconf.screens[screen_to_test].geometry.x
 167                    && si[screen].y_org == globalconf.screens[screen_to_test].geometry.y)
 168                     {
 169                         /* we already have a screen for this area, just check if
 170                          * it's not bigger and drop it */
 171                         drop = True;
 172                         globalconf.screens[screen_to_test].geometry.width =
 173                             MAX(si[screen].width, si[screen_to_test].width);
 174                         globalconf.screens[screen_to_test].geometry.height =
 175                             MAX(si[screen].height, si[screen_to_test].height);
 176                     }
 177             if(!drop)
 178                 globalconf.screens[globalconf.nscreen++].geometry = screen_xsi_to_area(si[screen]);
 179         }
 180
 181         /* realloc smaller if xinerama_screen_number != screen registered */
 182         if(xinerama_screen_number != globalconf.nscreen)
 183         {
 184             VirtScreen *newscreens = p_new(VirtScreen, globalconf.nscreen);
 185             memcpy(newscreens, globalconf.screens, globalconf.nscreen * sizeof(VirtScreen));
 186             p_delete(&globalconf.screens);
 187             globalconf.screens = newscreens;
 188         }
 189
 190         XFree(si);
 191     }
 192     else
 193     {
 194         globalconf.nscreen = ScreenCount(globalconf.display);
 195         globalconf.screens = p_new(VirtScreen, globalconf.nscreen);
 196         for(screen = 0; screen < globalconf.nscreen; screen++)
 197         {
 198             globalconf.screens[screen].geometry.x = 0;
 199             globalconf.screens[screen].geometry.y = 0;
 200             globalconf.screens[screen].geometry.width =
 201                 DisplayWidth(globalconf.display, screen);
 202             globalconf.screens[screen].geometry.height =
 203                 DisplayHeight(globalconf.display, screen);
 204         }
 205     }
 206
 207 }
 208
 209 /** This returns the real X screen number for a logical
 210  * screen if Xinerama is active.
 211  * \param screen the logical screen
 212  * \return the X screen
 213  */
 214 int
 215 get_phys_screen(int screen)
 216 {
 217     if(XineramaIsActive(globalconf.display))
 218         return DefaultScreen(globalconf.display);
 219     return screen;
 220 }
 221
 222 /** Move a client to a virtual screen
 223  * \param c the client
 224  * \param new_screen The destinatiuon screen
 225  * \param doresize set to True if we also move the client to the new x and
 226  *        y of the new screen
 227  */
 228 void
 229 move_client_to_screen(Client *c, int new_screen, Bool doresize)
 230 {
 231     Tag *tag;
 232     int old_screen = c->screen;
 233     Area from, to;
 234
 235     for(tag = globalconf.screens[old_screen].tags; tag; tag = tag->next)
 236         untag_client(c, tag);
 237
 238     c->screen = new_screen;
 239
 240     /* tag client with new screen tags */
 241     tag_client_with_current_selected(c);
 242
 243     /* resize the windows if it's floating */
 244     if(doresize && old_screen != c->screen)
 245     {
 246         Area new_geometry, new_f_geometry;
 247         new_f_geometry = c->f_geometry;
 248
 249         to = get_screen_area(c->screen, NULL, NULL);
 250         from = get_screen_area(old_screen, NULL, NULL);
 251
 252         /* compute new coords in new screen */
 253         new_f_geometry.x = (c->f_geometry.x - from.x) + to.x;
 254         new_f_geometry.y = (c->f_geometry.y - from.y) + to.y;
 255
 256         /* check that new coords are still in the screen */
 257         if(new_f_geometry.width > to.width)
 258             new_f_geometry.width = to.width;
 259         if(new_f_geometry.height > to.height)
 260             new_f_geometry.height = to.height;
 261         if(new_f_geometry.x + new_f_geometry.width >= to.x + to.width)
 262             new_f_geometry.x = to.x + to.width - new_f_geometry.width - 2 * c->border;
 263         if(new_f_geometry.y + new_f_geometry.height >= to.y + to.height)
 264             new_f_geometry.y = to.y + to.height - new_f_geometry.height - 2 * c->border;
 265
 266         if(c->ismax)
 267         {
 268             new_geometry = c->geometry;
 269
 270             /* compute new coords in new screen */
 271             new_geometry.x = (c->geometry.x - from.x) + to.x;
 272             new_geometry.y = (c->geometry.y - from.y) + to.y;
 273
 274             /* check that new coords are still in the screen */
 275             if(new_geometry.width > to.width)
 276                 new_geometry.width = to.width;
 277             if(new_geometry.height > to.height)
 278                 new_geometry.height = to.height;
 279             if(new_geometry.x + new_geometry.width >= to.x + to.width)
 280                 new_geometry.x = to.x + to.width - new_geometry.width - 2 * c->border;
 281             if(new_geometry.y + new_geometry.height >= to.y + to.height)
 282                 new_geometry.y = to.y + to.height - new_geometry.height - 2 * c->border;
 283
 284             /* compute new coords for max in new screen */
 285             c->m_geometry.x = (c->m_geometry.x - from.x) + to.x;
 286             c->m_geometry.y = (c->m_geometry.y - from.y) + to.y;
 287
 288             /* check that new coords are still in the screen */
 289             if(c->m_geometry.width > to.width)
 290                 c->m_geometry.width = to.width;
 291             if(c->m_geometry.height > to.height)
 292                 c->m_geometry.height = to.height;
 293             if(c->m_geometry.x + c->m_geometry.width >= to.x + to.width)
 294                 c->m_geometry.x = to.x + to.width - c->m_geometry.width - 2 * c->border;
 295             if(c->m_geometry.y + c->m_geometry.height >= to.y + to.height)
 296                 c->m_geometry.y = to.y + to.height - c->m_geometry.height - 2 * c->border;
 297
 298             client_resize(c, new_geometry, False);
 299         }
 300         /* if floating, move to this new coords */
 301         else if(c->isfloating)
 302             client_resize(c, new_f_geometry, False);
 303         /* otherwise just register them */
 304         else
 305         {
 306             c->f_geometry = new_f_geometry;
 307             globalconf.screens[old_screen].need_arrange = True;
 308             globalconf.screens[c->screen].need_arrange = True;
 309         }
 310     }
 311 }
 312
 313 /** Move mouse pointer to x_org and y_xorg of specified screen
 314  * \param screen screen number
 315  */
 316 static void
 317 move_mouse_pointer_to_screen(int screen)
 318 {
 319     if(XineramaIsActive(globalconf.display))
 320     {
 321         Area area = get_screen_area(screen, NULL, NULL);
 322         XWarpPointer(globalconf.display,
 323                      None,
 324                      DefaultRootWindow(globalconf.display),
 325                      0, 0, 0, 0, area.x, area.y);
 326     }
 327     else
 328         XWarpPointer(globalconf.display,
 329                      None,
 330                      RootWindow(globalconf.display, screen),
 331                      0, 0, 0, 0, 0, 0);
 332 }
 333
 334
 335 /** Switch focus to a specified screen
 336  * \param screen Screen ID
 337  * \param arg screen number
 338  * \ingroup ui_callback
 339  */
 340 void
 341 uicb_screen_focus(int screen, char *arg)
 342 {
 343     int new_screen;
 344
 345     if(arg)
 346         new_screen = compute_new_value_from_arg(arg, screen);
 347     else
 348         new_screen = screen + 1;
 349
 350     if (new_screen < 0)
 351         new_screen = globalconf.nscreen - 1;
 352     if (new_screen > (globalconf.nscreen - 1))
 353         new_screen = 0;
 354
 355     client_focus(NULL, new_screen, False);
 356
 357     move_mouse_pointer_to_screen(new_screen);
 358 }
 359
 360 /** Move client to a virtual screen (if Xinerama is active)
 361  * \param screen Screen ID
 362  * \param arg screen number
 363  * \ingroup ui_callback
 364  */
 365 void
 366 uicb_client_movetoscreen(int screen __attribute__ ((unused)), char *arg)
 367 {
 368     int new_screen, prev_screen;
 369     Client *sel = globalconf.focus->client;
 370
 371     if(!sel || !XineramaIsActive(globalconf.display))
 372         return;
 373
 374     if(arg)
 375         new_screen = compute_new_value_from_arg(arg, sel->screen);
 376     else
 377         new_screen = sel->screen + 1;
 378
 379     if(new_screen >= globalconf.nscreen)
 380         new_screen = 0;
 381     else if(new_screen < 0)
 382         new_screen = globalconf.nscreen - 1;
 383
 384     prev_screen = sel->screen;
 385     move_client_to_screen(sel, new_screen, True);
 386     move_mouse_pointer_to_screen(new_screen);
 387     client_focus(sel, sel->screen, False);
 388 }
 389 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80