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
  27 extern Client *sel, *clients;
  28
  29 /** Get screens info
  30  * \param disp Display ref
  31  * \param screen Screen number
  32  * \param statusbar statusbar
  33  * \param screen_number int pointer filled with number of screens
  34  * \return ScreenInfo struct array with all screens info
  35  */
  36 ScreenInfo *
  37 get_screen_info(Display *disp, int screen, Statusbar *statusbar, int *screen_number)
  38 {
  39     int i, fake_screen_number = 0;
  40     ScreenInfo *si;
  41
  42     if(XineramaIsActive(disp))
  43     {
  44         si = XineramaQueryScreens(disp, screen_number);
  45         fake_screen_number = *screen_number;
  46     }
  47     else
  48     {
  49         /* emulate Xinerama info but only fill the screen we want */
  50         *screen_number =  1;
  51         si = p_new(ScreenInfo, screen + 1);
  52         si[screen].width = DisplayWidth(disp, screen);
  53         si[screen].height = DisplayHeight(disp, screen);
  54         si[screen].x_org = 0;
  55         si[screen].y_org = 0;
  56         fake_screen_number = screen + 1;
  57     }
  58
  59     if(statusbar)
  60         for(i = 0; i < fake_screen_number; i++)
  61         {
  62             if(statusbar->position == BarTop
  63                || statusbar->position == BarBot)
  64                 si[i].height -= statusbar->height;
  65             if(statusbar->position == BarTop)
  66                 si[i].y_org += statusbar->height;
  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 -1 on no match
  99  */
 100 int
 101 get_screen_bycoord(Display *disp, int x, int y)
 102 {
 103     ScreenInfo *si;
 104     int screen_number, 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, &screen_number);
 111
 112     for(i = 0; i < screen_number; i++)
 113         if(x >= si[i].x_org && x < si[i].x_org + si[i].width
 114            && y >= si[i].y_org && y < si[i].y_org + si[i].height)
 115         {
 116             XFree(si);
 117             return i;
 118         }
 119
 120     XFree(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 void
 156 move_client_to_screen(Client *c, awesome_config *acf_new, Bool doresize)
 157 {
 158     int i;
 159     ScreenInfo *si;
 160
 161     c->screen = acf_new->screen;
 162     p_realloc(&c->tags, acf_new->ntags);
 163     for(i = 0; i < acf_new->ntags; i++)
 164         c->tags[i] = acf_new->tags[i].selected;
 165
 166     si = get_screen_info(c->display, c->screen, &acf_new->statusbar, &i);
 167     c->rx = si[c->screen].x_org;
 168     c->ry = si[c->screen].y_org;
 169     if(doresize)
 170         resize(c, c->rx, c->ry, c->rw, c->rh, acf_new, True);
 171     XFree(si);
 172 }
 173
 174 static void
 175 move_mouse_pointer_to_screen(Display *disp, int screen)
 176 {
 177     if(XineramaIsActive(disp))
 178     {
 179         int dummy;
 180         ScreenInfo *si = get_screen_info(disp, screen, NULL, &dummy);
 181         XWarpPointer(disp, None, DefaultRootWindow(disp), 0, 0, 0, 0, si[screen].x_org, si[screen].y_org);
 182         XFree(si);
 183     }
 184     else
 185         XWarpPointer(disp, None, RootWindow(disp, screen), 0, 0, 0, 0, 0, 0);
 186 }
 187
 188 void
 189 uicb_focusnextscreen(Display *disp,
 190                      DC *drawcontext,
 191                      awesome_config * awesomeconf,
 192                      const char *arg __attribute__ ((unused)))
 193 {
 194     Client *c;
 195     int next_screen = awesomeconf->screen + 1 >= get_screen_count(disp) ? 0 : awesomeconf->screen + 1;
 196
 197     for(c = clients; c && !isvisible(c, next_screen, awesomeconf[next_screen - awesomeconf->screen].tags, awesomeconf[next_screen - awesomeconf->screen].ntags); c = c->next);
 198     if(c)
 199     {
 200         focus(c->display, &drawcontext[next_screen - awesomeconf->screen], c, True, &awesomeconf[next_screen - awesomeconf->screen]);
 201         restack(c->display, &drawcontext[next_screen - awesomeconf->screen], &awesomeconf[next_screen - awesomeconf->screen]);
 202     }
 203     move_mouse_pointer_to_screen(disp, next_screen);
 204 }
 205
 206 void
 207 uicb_focusprevscreen(Display *disp,
 208                      DC *drawcontext,
 209                      awesome_config * awesomeconf,
 210                      const char *arg __attribute__ ((unused)))
 211 {
 212     Client *c;
 213     int prev_screen = awesomeconf->screen - 1 < 0 ? get_screen_count(disp) - 1 : awesomeconf->screen - 1;
 214
 215     for(c = clients; c && !isvisible(c, prev_screen, awesomeconf[prev_screen - awesomeconf->screen].tags, awesomeconf[prev_screen - awesomeconf->screen].ntags); c = c->next);
 216     if(c)
 217     {
 218         focus(c->display, &drawcontext[prev_screen - awesomeconf->screen], c, True, &awesomeconf[prev_screen - awesomeconf->screen]);
 219         restack(c->display, &drawcontext[prev_screen - awesomeconf->screen], &awesomeconf[prev_screen - awesomeconf->screen]);
 220     }
 221     move_mouse_pointer_to_screen(disp, prev_screen);
 222 }
 223
 224 void
 225 uicb_movetoscreen(Display *disp,
 226                   DC *drawcontext,
 227                   awesome_config * awesomeconf,
 228                   const char *arg)
 229 {
 230     int new_screen, prev_screen;
 231
 232     if(!XineramaIsActive(disp) || !sel)
 233         return;
 234
 235     if(arg)
 236     {
 237         new_screen = strtol(arg, NULL, 10);
 238         if(new_screen >= get_screen_count(disp) || new_screen < 0)
 239             return;
 240     }
 241     else
 242         new_screen = sel->screen + 1 >= get_screen_count(disp) ? 0 : sel->screen + 1;
 243
 244     prev_screen = sel->screen;
 245     move_client_to_screen(sel, &awesomeconf[new_screen - awesomeconf->screen], True);
 246     move_mouse_pointer_to_screen(disp, new_screen);
 247     arrange(disp, drawcontext, &awesomeconf[prev_screen - awesomeconf->screen]);
 248     arrange(disp, &drawcontext[new_screen - awesomeconf->screen], &awesomeconf[new_screen - awesomeconf->screen]);
 249 }