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