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  * \return ScreenInfo struct array with all screens info
  34  */
  35 ScreenInfo *
  36 get_screen_info(Display *disp, int screen, Statusbar *statusbar)
  37 {
  38     int i, screen_number = 0;
  39     ScreenInfo *si;
  40
  41     if(XineramaIsActive(disp))
  42         si = XineramaQueryScreens(disp, &screen_number);
  43     else
  44     {
  45         /* emulate Xinerama info but only fill the screen we want */
  46         si = p_new(ScreenInfo, screen + 1);
  47         si[screen].width = DisplayWidth(disp, screen);
  48         si[screen].height = DisplayHeight(disp, screen);
  49         si[screen].x_org = 0;
  50         si[screen].y_org = 0;
  51         screen_number = screen + 1;
  52     }
  53
  54     if(statusbar)
  55         for(i = 0; i < screen_number; i++)
  56         {
  57             if(statusbar->position == BarTop
  58                || statusbar->position == BarBot)
  59                 si[i].height -= statusbar->height;
  60             if(statusbar->position == BarTop)
  61                 si[i].y_org += statusbar->height;
  62         }
  63
  64     return si;
  65 }
  66
  67 /** Get display info
  68  * \param disp Display ref
  69  * \param screen Screen number
  70  * \param statusbar the statusbar
  71  * \return ScreenInfo struct pointer with all display info
  72  */
  73 ScreenInfo *
  74 get_display_info(Display *disp, int screen, Statusbar *statusbar)
  75 {
  76     ScreenInfo *si;
  77
  78     si = p_new(ScreenInfo, 1);
  79
  80     si->x_org = 0;
  81     si->y_org = statusbar && statusbar->position == BarTop ? statusbar->height : 0;
  82     si->width = DisplayWidth(disp, screen);
  83     si->height = DisplayHeight(disp, screen) -
  84         (statusbar && (statusbar->position == BarTop || statusbar->position == BarBot) ? statusbar->height : 0);
  85
  86     return si;
  87 }
  88
  89 /** Return the Xinerama screen number where the coordinates belongs to
  90  * \param disp Display ref
  91  * \param x x coordinate of the window
  92  * \param y y coordinate of the window
  93  * \return screen number or DefaultScreen of disp on no match
  94  */
  95 int
  96 get_screen_bycoord(Display *disp, int x, int y)
  97 {
  98     ScreenInfo *si;
  99     int i;
 100
 101     /* don't waste our time */
 102     if(!XineramaIsActive(disp))
 103         return DefaultScreen(disp);
 104
 105     si = get_screen_info(disp, 0, NULL);
 106
 107     for(i = 0; i < get_screen_count(disp); i++)
 108         if(x >= si[i].x_org && x < si[i].x_org + si[i].width
 109            && y >= si[i].y_org && y < si[i].y_org + si[i].height)
 110         {
 111             XFree(si);
 112             return i;
 113         }
 114
 115     XFree(si);
 116     return DefaultScreen(disp);
 117 }
 118
 119 /** Return the actual screen count
 120  * \param disp Display ref
 121  * \return the number of screen available
 122  */
 123 int
 124 get_screen_count(Display *disp)
 125 {
 126     int screen_number;
 127
 128     if(XineramaIsActive(disp))
 129         XineramaQueryScreens(disp, &screen_number);
 130     else
 131         return ScreenCount(disp);
 132
 133     return screen_number;
 134 }
 135
 136 /** This returns the real X screen number for a logical
 137  * screen if Xinerama is active.
 138  * \param disp Display ref
 139  * \param screen the logical screen
 140  * \return the X screen
 141  */
 142 int
 143 get_phys_screen(Display *disp, int screen)
 144 {
 145     if(XineramaIsActive(disp))
 146         return DefaultScreen(disp);
 147     return screen;
 148 }
 149
 150 /** Move a client to a virtual screen
 151  * \param c the client
 152  * \param acf_new the awesome_config for the new screen
 153  * \param doresize set to True if we also move the client to the new x_org and
 154  *         y_org of the new screen
 155  */
 156 void
 157 move_client_to_screen(Client *c, awesome_config *acf_new, Bool doresize)
 158 {
 159     int i;
 160     ScreenInfo *si;
 161
 162     c->screen = acf_new->screen;
 163     p_realloc(&c->tags, acf_new->ntags);
 164     for(i = 0; i < acf_new->ntags; i++)
 165         c->tags[i] = acf_new->tags[i].selected;
 166
 167     si = get_screen_info(c->display, c->screen, &acf_new->statusbar);
 168     c->rx = si[c->screen].x_org;
 169     c->ry = si[c->screen].y_org;
 170     if(doresize)
 171         resize(c, c->rx, c->ry, c->rw, c->rh, acf_new, True);
 172     XFree(si);
 173 }
 174
 175 static void
 176 move_mouse_pointer_to_screen(Display *disp, int screen)
 177 {
 178     if(XineramaIsActive(disp))
 179     {
 180         ScreenInfo *si = get_screen_info(disp, screen, NULL);
 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 /** Move client to a virtual screen (if Xinerama is active)
 225  * \param disp Display ref
 226  * \param drawcontext drawcontext ref
 227  * \param awesomeconf awesome config
 228  * \param arg screen number
 229  * \ingroup ui_callback
 230  */
 231 void
 232 uicb_movetoscreen(Display *disp,
 233                   DC *drawcontext,
 234                   awesome_config * awesomeconf,
 235                   const char *arg)
 236 {
 237     int new_screen, prev_screen;
 238
 239     if(!XineramaIsActive(disp) || !sel)
 240         return;
 241
 242     if(arg)
 243     {
 244         new_screen = strtol(arg, NULL, 10);
 245         if(new_screen >= get_screen_count(disp) || new_screen < 0)
 246             return;
 247     }
 248     else
 249         new_screen = sel->screen + 1 >= get_screen_count(disp) ? 0 : sel->screen + 1;
 250
 251     prev_screen = sel->screen;
 252     move_client_to_screen(sel, &awesomeconf[new_screen - awesomeconf->screen], True);
 253     move_mouse_pointer_to_screen(disp, new_screen);
 254     arrange(disp, drawcontext, &awesomeconf[prev_screen - awesomeconf->screen]);
 255     arrange(disp, &drawcontext[new_screen - awesomeconf->screen], &awesomeconf[new_screen - awesomeconf->screen]);
 256 }