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