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 "util.h"
  23 #include "screen.h"
  24 #include "tag.h"
  25 #include "layout.h"
  26 #include "statusbar.h"
  27
  28 /** Get screens info
  29  * \param disp Display ref
  30  * \param screen Screen number
  31  * \param statusbar statusbar
  32  * \return ScreenInfo struct array with all screens info
  33  */
  34 ScreenInfo *
  35 get_screen_info(Display *disp, int screen, Statusbar *statusbar)
  36 {
  37     int i, screen_number = 0;
  38     ScreenInfo *si;
  39
  40     if(XineramaIsActive(disp))
  41         si = XineramaQueryScreens(disp, &screen_number);
  42     else
  43     {
  44         /* emulate Xinerama info but only fill the screen we want */
  45         si = p_new(ScreenInfo, screen + 1);
  46         si[screen].width = DisplayWidth(disp, screen);
  47         si[screen].height = DisplayHeight(disp, screen);
  48         si[screen].x_org = 0;
  49         si[screen].y_org = 0;
  50         screen_number = screen + 1;
  51     }
  52
  53     if(statusbar)
  54         for(i = 0; i < screen_number; i++)
  55             switch(statusbar->position)
  56             {
  57               case BarTop:
  58                 si[i].y_org += statusbar->height;
  59               case BarBot:
  60                 si[i].height -= statusbar->height;
  61                 break;
  62               case BarLeft:
  63                 si[i].x_org += statusbar->height;
  64               case BarRight:
  65                 si[i].width -=  statusbar->height;
  66                 break;
  67             }
  68
  69     return si;
  70 }
  71
  72 /** Get display info
  73  * \param disp Display ref
  74  * \param screen Screen number
  75  * \param statusbar the statusbar
  76  * \return ScreenInfo struct pointer with all display info
  77  */
  78 ScreenInfo *
  79 get_display_info(Display *disp, int screen, Statusbar *statusbar)
  80 {
  81     ScreenInfo *si;
  82
  83     si = p_new(ScreenInfo, 1);
  84
  85     si->x_org = 0;
  86     si->y_org = statusbar && statusbar->position == BarTop ? statusbar->height : 0;
  87     si->width = DisplayWidth(disp, screen);
  88     si->height = DisplayHeight(disp, screen) -
  89         (statusbar && (statusbar->position == BarTop || statusbar->position == BarBot) ? statusbar->height : 0);
  90
  91     return si;
  92 }
  93
  94 /** Return the Xinerama screen number where the coordinates belongs to
  95  * \param disp Display ref
  96  * \param x x coordinate of the window
  97  * \param y y coordinate of the window
  98  * \return screen number or DefaultScreen of disp on no match
  99  */
 100 int
 101 get_screen_bycoord(Display *disp, int x, int y)
 102 {
 103     ScreenInfo *si;
 104     int i;
 105
 106     /* don't waste our time */
 107     if(!XineramaIsActive(disp))
 108         return DefaultScreen(disp);
 109
 110     si = get_screen_info(disp, 0, NULL);
 111
 112     for(i = 0; i < get_screen_count(disp); i++)
 113         if((x < 0 || (x >= si[i].x_org && x < si[i].x_org + si[i].width))
 114            && (y< 0 || (y >= si[i].y_org && y < si[i].y_org + si[i].height)))
 115         {
 116             p_delete(&si);
 117             return i;
 118         }
 119
 120     p_delete(&si);
 121     return DefaultScreen(disp);
 122 }
 123
 124 /** Return the actual screen count
 125  * \param disp Display ref
 126  * \return the number of screen available
 127  */
 128 int
 129 get_screen_count(Display *disp)
 130 {
 131     int screen_number;
 132
 133     if(XineramaIsActive(disp))
 134         XineramaQueryScreens(disp, &screen_number);
 135     else
 136         return ScreenCount(disp);
 137
 138     return screen_number;
 139 }
 140
 141 /** This returns the real X screen number for a logical
 142  * screen if Xinerama is active.
 143  * \param disp Display ref
 144  * \param screen the logical screen
 145  * \return the X screen
 146  */
 147 int
 148 get_phys_screen(Display *disp, int screen)
 149 {
 150     if(XineramaIsActive(disp))
 151         return DefaultScreen(disp);
 152     return screen;
 153 }
 154
 155 /** Move a client to a virtual screen
 156  * \param c the client
 157  * \param acf_new the awesome_config for the new screen
 158  * \param doresize set to True if we also move the client to the new x_org and
 159  *         y_org of the new screen
 160  */
 161 void
 162 move_client_to_screen(Client *c, awesome_config *acf_new, Bool doresize)
 163 {
 164     int i, old_screen = c->screen;
 165
 166     c->screen = acf_new->screen;
 167
 168     p_realloc(&c->tags, acf_new->ntags);
 169     for(i = 0; i < acf_new->ntags; i++)
 170         c->tags[i] = acf_new->tags[i].selected;
 171
 172     if(doresize && old_screen != c->screen)
 173     {
 174         ScreenInfo *si, *si_old;
 175
 176         si = get_screen_info(c->display, c->screen, NULL);
 177         si_old = get_screen_info(c->display, old_screen, NULL);
 178
 179         /* compute new coords in new screen */
 180         c->rx = (c->rx - si_old[old_screen].x_org) + si[c->screen].x_org;
 181         c->ry = (c->ry - si_old[old_screen].y_org) + si[c->screen].y_org;
 182         /* check that new coords are still in the screen */
 183         if(c->rw > si[c->screen].width)
 184             c->rw = si[c->screen].width;
 185         if(c->rh > si[c->screen].height)
 186             c->rh = si[c->screen].height;
 187         if(c->rx + c->rw >= si[c->screen].x_org + si[c->screen].width)
 188             c->rx = si[c->screen].x_org + si[c->screen].width - c->rw - 2 * c->border;
 189         if(c->ry + c->rh >= si[c->screen].y_org + si[c->screen].height)
 190             c->ry = si[c->screen].y_org + si[c->screen].height - c->rh - 2 * c->border;
 191
 192         client_resize(c, c->rx, c->ry, c->rw, c->rh, acf_new, True, False);
 193
 194         p_delete(&si);
 195         p_delete(&si_old);
 196     }
 197
 198     focus(c, True, acf_new);
 199
 200     /* redraw statusbar on all screens */
 201     drawstatusbar(&acf_new[old_screen - acf_new->screen]);
 202     drawstatusbar(acf_new);
 203 }
 204
 205 /** Move mouse pointer to x_org and y_xorg of specified screen
 206  * \param disp display ref
 207  * \param screen screen number
 208  */
 209 static void
 210 move_mouse_pointer_to_screen(Display *disp, int screen)
 211 {
 212     if(XineramaIsActive(disp))
 213     {
 214         ScreenInfo *si = get_screen_info(disp, screen, NULL);
 215         XWarpPointer(disp, None, DefaultRootWindow(disp), 0, 0, 0, 0, si[screen].x_org, si[screen].y_org);
 216         p_delete(&si);
 217     }
 218     else
 219         XWarpPointer(disp, None, RootWindow(disp, screen), 0, 0, 0, 0, 0, 0);
 220 }
 221
 222 void
 223 uicb_focusnextscreen(awesome_config * awesomeconf,
 224                      const char *arg __attribute__ ((unused)))
 225 {
 226     Client *c;
 227     int next_screen = awesomeconf->screen + 1 >= get_screen_count(awesomeconf->display) ? 0 : awesomeconf->screen + 1;
 228
 229     for(c = *awesomeconf->clients; c && !isvisible(c, next_screen, awesomeconf[next_screen - awesomeconf->screen].tags, awesomeconf[next_screen - awesomeconf->screen].ntags); c = c->next);
 230     if(c)
 231     {
 232         focus(c, True, &awesomeconf[next_screen - awesomeconf->screen]);
 233         restack(&awesomeconf[next_screen - awesomeconf->screen]);
 234     }
 235     move_mouse_pointer_to_screen(awesomeconf->display, next_screen);
 236 }
 237
 238 void
 239 uicb_focusprevscreen(awesome_config * awesomeconf,
 240                      const char *arg __attribute__ ((unused)))
 241 {
 242     Client *c;
 243     int prev_screen = awesomeconf->screen - 1 < 0 ? get_screen_count(awesomeconf->display) - 1 : awesomeconf->screen - 1;
 244
 245     for(c = *awesomeconf->clients; c && !isvisible(c, prev_screen, awesomeconf[prev_screen - awesomeconf->screen].tags, awesomeconf[prev_screen - awesomeconf->screen].ntags); c = c->next);
 246     if(c)
 247     {
 248         focus(c, True, &awesomeconf[prev_screen - awesomeconf->screen]);
 249         restack(&awesomeconf[prev_screen - awesomeconf->screen]);
 250     }
 251     move_mouse_pointer_to_screen(awesomeconf->display, prev_screen);
 252 }
 253
 254 /** Move client to a virtual screen (if Xinerama is active)
 255  * \param awesomeconf awesome config
 256  * \param arg screen number
 257  * \ingroup ui_callback
 258  */
 259 void
 260 uicb_movetoscreen(awesome_config * awesomeconf,
 261                   const char *arg)
 262 {
 263     int new_screen, prev_screen;
 264     Client *sel = get_current_tag(awesomeconf->tags, awesomeconf->ntags)->client_sel;
 265
 266     if(!sel || !XineramaIsActive(awesomeconf->display))
 267         return;
 268
 269     if(arg)
 270         new_screen = compute_new_value_from_arg(arg, sel->screen);
 271     else
 272         new_screen = sel->screen + 1;
 273
 274     if(new_screen >= get_screen_count(awesomeconf->display))
 275         new_screen = 0;
 276     else if(new_screen < 0)
 277         new_screen = get_screen_count(awesomeconf->display) - 1;
 278
 279     prev_screen = sel->screen;
 280     move_client_to_screen(sel, &awesomeconf[new_screen - awesomeconf->screen], True);
 281     move_mouse_pointer_to_screen(awesomeconf->display, new_screen);
 282     arrange(&awesomeconf[prev_screen - awesomeconf->screen]);
 283     arrange(&awesomeconf[new_screen - awesomeconf->screen]);
 284 }
 285 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99