screen.c

   1 /*
   2  * screen.c - screen management
   3  *
   4  * Copyright © 2007-2008 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
  30 extern AwesomeConf globalconf;
  31
  32 /** Get screens info
  33  * \param screen Screen number
  34  * \param statusbar statusbar
  35  * \param padding Padding
  36  * \return Area
  37  */
  38 Area
  39 screen_get_area(int screen, Statusbar *statusbar, Padding *padding)
  40 {
  41     Area area;
  42     Statusbar *sb;
  43
  44     area = globalconf.screens[screen].geometry;
  45
  46     /* make padding corrections */
  47     if(padding)
  48     {
  49         area.x += padding->left;
  50         area.y += padding->top;
  51         area.width -= padding->left + padding->right;
  52         area.height -= padding->top + padding->bottom;
  53     }
  54
  55     for(sb = statusbar; sb; sb = sb->next)
  56         switch(sb->position)
  57         {
  58           case Top:
  59             area.y += sb->height;
  60           case Bottom:
  61             area.height -= sb->height;
  62             break;
  63           case Left:
  64             area.x += sb->height;
  65           case Right:
  66             area.width -= sb->height;
  67             break;
  68           case Off:
  69             break;
  70         }
  71
  72     return area;
  73 }
  74
  75 /** Get display info
  76  * \param screen Screen number
  77  * \param statusbar the statusbar
  78  * \param padding Padding
  79  * \return Area
  80  */
  81 Area
  82 get_display_area(int screen, Statusbar *statusbar, Padding *padding)
  83 {
  84     Area area = { 0, 0, 0, 0, NULL };
  85     Statusbar *sb;
  86
  87     area.width = DisplayWidth(globalconf.display, screen);
  88     area.height = DisplayHeight(globalconf.display, screen);
  89
  90     for(sb = statusbar; sb; sb = sb->next)
  91     {
  92         area.y += sb->position == Top ? sb->height : 0;
  93         area.height -= (sb->position == Top || sb->position == Bottom) ? sb->height : 0;
  94     }
  95
  96     /* make padding corrections */
  97     if(padding)
  98     {
  99             area.x += padding->left;
 100             area.y += padding->top;
 101             area.width -= padding->left + padding->right;
 102             area.height -= padding->top + padding->bottom;
 103     }
 104     return area;
 105 }
 106
 107 /** Return the Xinerama screen number where the coordinates belongs to
 108  * \param x x coordinate of the window
 109  * \param y y coordinate of the window
 110  * \return screen number or DefaultScreen of disp on no match
 111  */
 112 int
 113 screen_get_bycoord(int screen, int x, int y)
 114 {
 115     int i;
 116     Area area;
 117
 118     /* don't waste our time */
 119     if(!XineramaIsActive(globalconf.display))
 120         return screen;
 121
 122     for(i = 0; i < globalconf.nscreen; i++)
 123     {
 124         area = screen_get_area(i, NULL, NULL);
 125         if((x < 0 || (x >= area.x && x < area.x + area.width))
 126            && (y < 0 || (y >= area.y && y < area.y + area.height)))
 127             return i;
 128     }
 129     return DefaultScreen(globalconf.display);
 130 }
 131
 132
 133 static inline Area
 134 screen_xsi_to_area(XineramaScreenInfo si)
 135 {
 136     Area a;
 137
 138     a.x = si.x_org;
 139     a.y = si.y_org;
 140     a.width = si.width;
 141     a.height = si.height;
 142     a.next = NULL;
 143
 144     return a;
 145 }
 146
 147 void
 148 screen_build_screens(void)
 149 {
 150     XineramaScreenInfo *si;
 151     int xinerama_screen_number, screen, screen_to_test;
 152     Bool drop;
 153
 154     if(XineramaIsActive(globalconf.display))
 155     {
 156         si = XineramaQueryScreens(globalconf.display, &xinerama_screen_number);
 157         globalconf.screens = p_new(VirtScreen, xinerama_screen_number);
 158         globalconf.nscreen = 0;
 159
 160         /* now check if screens overlaps (same x,y): if so, we take only the biggest one */
 161         for(screen = 0; screen < xinerama_screen_number; screen++)
 162         {
 163             drop = False;
 164             for(screen_to_test = 0; screen_to_test < globalconf.nscreen; screen_to_test++)
 165                 if(si[screen].x_org == globalconf.screens[screen_to_test].geometry.x
 166                    && si[screen].y_org == globalconf.screens[screen_to_test].geometry.y)
 167                     {
 168                         /* we already have a screen for this area, just check if
 169                          * it's not bigger and drop it */
 170                         drop = True;
 171                         globalconf.screens[screen_to_test].geometry.width =
 172                             MAX(si[screen].width, si[screen_to_test].width);
 173                         globalconf.screens[screen_to_test].geometry.height =
 174                             MAX(si[screen].height, si[screen_to_test].height);
 175                     }
 176             if(!drop)
 177                 globalconf.screens[globalconf.nscreen++].geometry = screen_xsi_to_area(si[screen]);
 178         }
 179
 180         /* realloc smaller if xinerama_screen_number != screen registered */
 181         if(xinerama_screen_number != globalconf.nscreen)
 182         {
 183             VirtScreen *newscreens = p_new(VirtScreen, globalconf.nscreen);
 184             memcpy(newscreens, globalconf.screens, globalconf.nscreen * sizeof(VirtScreen));
 185             p_delete(&globalconf.screens);
 186             globalconf.screens = newscreens;
 187         }
 188
 189         XFree(si);
 190     }
 191     else
 192     {
 193         globalconf.nscreen = ScreenCount(globalconf.display);
 194         globalconf.screens = p_new(VirtScreen, globalconf.nscreen);
 195         for(screen = 0; screen < globalconf.nscreen; screen++)
 196         {
 197             globalconf.screens[screen].geometry.x = 0;
 198             globalconf.screens[screen].geometry.y = 0;
 199             globalconf.screens[screen].geometry.width =
 200                 DisplayWidth(globalconf.display, screen);
 201             globalconf.screens[screen].geometry.height =
 202                 DisplayHeight(globalconf.display, screen);
 203         }
 204     }
 205
 206 }
 207
 208 /** This returns the real X screen number for a logical
 209  * screen if Xinerama is active.
 210  * \param screen the logical screen
 211  * \return the X screen
 212  */
 213 int
 214 get_phys_screen(int screen)
 215 {
 216     if(XineramaIsActive(globalconf.display))
 217         return DefaultScreen(globalconf.display);
 218     return screen;
 219 }
 220
 221 /** Move a client to a virtual screen
 222  * \param c the client
 223  * \param new_screen The destinatiuon screen
 224  * \param doresize set to True if we also move the client to the new x and
 225  *        y of the new screen
 226  */
 227 void
 228 move_client_to_screen(Client *c, int new_screen, Bool doresize)
 229 {
 230     Tag *tag;
 231     int old_screen = c->screen;
 232     Area from, to;
 233
 234     for(tag = globalconf.screens[old_screen].tags; tag; tag = tag->next)
 235         untag_client(c, tag);
 236
 237     c->screen = new_screen;
 238
 239     /* tag client with new screen tags */
 240     tag_client_with_current_selected(c);
 241
 242     /* resize the windows if it's floating */
 243     if(doresize && old_screen != c->screen)
 244     {
 245         Area new_geometry, new_f_geometry;
 246         new_f_geometry = c->f_geometry;
 247
 248         to = screen_get_area(c->screen, NULL, NULL);
 249         from = screen_get_area(old_screen, NULL, NULL);
 250
 251         /* compute new coords in new screen */
 252         new_f_geometry.x = (c->f_geometry.x - from.x) + to.x;
 253         new_f_geometry.y = (c->f_geometry.y - from.y) + to.y;
 254
 255         /* check that new coords are still in the screen */
 256         if(new_f_geometry.width > to.width)
 257             new_f_geometry.width = to.width;
 258         if(new_f_geometry.height > to.height)
 259             new_f_geometry.height = to.height;
 260         if(new_f_geometry.x + new_f_geometry.width >= to.x + to.width)
 261             new_f_geometry.x = to.x + to.width - new_f_geometry.width - 2 * c->border;
 262         if(new_f_geometry.y + new_f_geometry.height >= to.y + to.height)
 263             new_f_geometry.y = to.y + to.height - new_f_geometry.height - 2 * c->border;
 264
 265         if(c->ismax)
 266         {
 267             new_geometry = c->geometry;
 268
 269             /* compute new coords in new screen */
 270             new_geometry.x = (c->geometry.x - from.x) + to.x;
 271             new_geometry.y = (c->geometry.y - from.y) + to.y;
 272
 273             /* check that new coords are still in the screen */
 274             if(new_geometry.width > to.width)
 275                 new_geometry.width = to.width;
 276             if(new_geometry.height > to.height)
 277                 new_geometry.height = to.height;
 278             if(new_geometry.x + new_geometry.width >= to.x + to.width)
 279                 new_geometry.x = to.x + to.width - new_geometry.width - 2 * c->border;
 280             if(new_geometry.y + new_geometry.height >= to.y + to.height)
 281                 new_geometry.y = to.y + to.height - new_geometry.height - 2 * c->border;
 282
 283             /* compute new coords for max in new screen */
 284             c->m_geometry.x = (c->m_geometry.x - from.x) + to.x;
 285             c->m_geometry.y = (c->m_geometry.y - from.y) + to.y;
 286
 287             /* check that new coords are still in the screen */
 288             if(c->m_geometry.width > to.width)
 289                 c->m_geometry.width = to.width;
 290             if(c->m_geometry.height > to.height)
 291                 c->m_geometry.height = to.height;
 292             if(c->m_geometry.x + c->m_geometry.width >= to.x + to.width)
 293                 c->m_geometry.x = to.x + to.width - c->m_geometry.width - 2 * c->border;
 294             if(c->m_geometry.y + c->m_geometry.height >= to.y + to.height)
 295                 c->m_geometry.y = to.y + to.height - c->m_geometry.height - 2 * c->border;
 296
 297             client_resize(c, new_geometry, False);
 298         }
 299         /* if floating, move to this new coords */
 300         else if(c->isfloating)
 301             client_resize(c, new_f_geometry, False);
 302         /* otherwise just register them */
 303         else
 304         {
 305             c->f_geometry = new_f_geometry;
 306             globalconf.screens[old_screen].need_arrange = True;
 307             globalconf.screens[c->screen].need_arrange = True;
 308         }
 309     }
 310 }
 311
 312 /** Move mouse pointer to x_org and y_xorg of specified screen
 313  * \param screen screen number
 314  */
 315 static void
 316 move_mouse_pointer_to_screen(int phys_screen)
 317 {
 318     if(XineramaIsActive(globalconf.display))
 319     {
 320         Area area = screen_get_area(phys_screen, NULL, NULL);
 321         XWarpPointer(globalconf.display,
 322                      None,
 323                      DefaultRootWindow(globalconf.display),
 324                      0, 0, 0, 0, area.x, area.y);
 325     }
 326     else
 327         XWarpPointer(globalconf.display,
 328                      None,
 329                      RootWindow(globalconf.display, phys_screen),
 330                      0, 0, 0, 0, 0, 0);
 331 }
 332
 333
 334 /** Switch focus to a specified screen
 335  * \param screen Screen ID
 336  * \param arg screen number
 337  * \ingroup ui_callback
 338  */
 339 void
 340 uicb_screen_focus(int screen, char *arg)
 341 {
 342     int new_screen;
 343
 344     if(arg)
 345         new_screen = compute_new_value_from_arg(arg, screen);
 346     else
 347         new_screen = screen + 1;
 348
 349     if (new_screen < 0)
 350         new_screen = globalconf.nscreen - 1;
 351     if (new_screen > (globalconf.nscreen - 1))
 352         new_screen = 0;
 353
 354     client_focus(NULL, new_screen, True);
 355
 356     move_mouse_pointer_to_screen(new_screen);
 357 }
 358
 359 /** Move client to a virtual screen (if Xinerama is active)
 360  * \param screen Screen ID
 361  * \param arg screen number
 362  * \ingroup ui_callback
 363  */
 364 void
 365 uicb_client_movetoscreen(int screen __attribute__ ((unused)), char *arg)
 366 {
 367     int new_screen, prev_screen;
 368     Client *sel = globalconf.focus->client;
 369
 370     if(!sel || !XineramaIsActive(globalconf.display))
 371         return;
 372
 373     if(arg)
 374         new_screen = compute_new_value_from_arg(arg, sel->screen);
 375     else
 376         new_screen = sel->screen + 1;
 377
 378     if(new_screen >= globalconf.nscreen)
 379         new_screen = 0;
 380     else if(new_screen < 0)
 381         new_screen = globalconf.nscreen - 1;
 382
 383     prev_screen = sel->screen;
 384     move_client_to_screen(sel, new_screen, True);
 385     move_mouse_pointer_to_screen(new_screen);
 386     client_focus(sel, sel->screen, True);
 387 }
 388 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80