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 "util.h"
  25 #include "screen.h"
  26 #include "tag.h"
  27 #include "focus.h"
  28 #include "statusbar.h"
  29 #include "client.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     int screen_number = 0;
  43     XineramaScreenInfo *si;
  44     Area area;
  45     Statusbar *sb;
  46
  47     if(XineramaIsActive(globalconf.display))
  48     {
  49         si = XineramaQueryScreens(globalconf.display, &screen_number);
  50         if (screen_number < screen)
  51             eprint("Info request for unknown screen.");
  52         area.x = si[screen].x_org;
  53         area.y = si[screen].y_org;
  54         area.width = si[screen].width;
  55         area.height = si[screen].height;
  56         XFree(si);
  57     }
  58     else
  59     {
  60         /* emulate Xinerama info but only fill the screen we want */
  61         area.x = 0;
  62         area.y = 0;
  63         area.width = DisplayWidth(globalconf.display, screen);
  64         area.height = DisplayHeight(globalconf.display, screen);
  65     }
  66
  67      /* make padding corrections */
  68     if(padding)
  69     {
  70         area.x += padding->left;
  71         area.y += padding->top;
  72         area.width -= padding->left + padding->right;
  73         area.height -= padding->top + padding->bottom;
  74     }
  75
  76     for(sb = statusbar; sb; sb = sb->next)
  77         switch(sb->position)
  78         {
  79           case Top:
  80             area.y += sb->height;
  81           case Bottom:
  82             area.height -= sb->height;
  83             break;
  84           case Left:
  85             area.x += sb->height;
  86           case Right:
  87             area.width -= sb->height;
  88             break;
  89           case Off:
  90             break;
  91         }
  92
  93     return area;
  94 }
  95
  96 /** Get display info
  97  * \param screen Screen number
  98  * \param statusbar the statusbar
  99  * \param padding Padding
 100  * \return Area
 101  */
 102 Area
 103 get_display_area(int screen, Statusbar *statusbar, Padding *padding)
 104 {
 105     Area area;
 106     Statusbar *sb;
 107
 108     area.x = 0;
 109     area.y = 0;
 110     area.width = DisplayWidth(globalconf.display, screen);
 111     area.height = DisplayHeight(globalconf.display, screen);
 112
 113     for(sb = statusbar; sb; sb = sb->next)
 114     {
 115         area.y += sb->position == Top ? sb->height : 0;
 116         area.height -= (sb->position == Top || sb->position == Bottom) ? sb->height : 0;
 117     }
 118
 119     /* make padding corrections */
 120     if(padding)
 121     {
 122             area.x += padding->left;
 123             area.y += padding->top;
 124             area.width -= padding->left + padding->right;
 125             area.height -= padding->top + padding->bottom;
 126     }
 127     return area;
 128 }
 129
 130 /** Return the Xinerama screen number where the coordinates belongs to
 131  * \param x x coordinate of the window
 132  * \param y y coordinate of the window
 133  * \return screen number or DefaultScreen of disp on no match
 134  */
 135 int
 136 get_screen_bycoord(int x, int y)
 137 {
 138     int i;
 139     Area area;
 140
 141     /* don't waste our time */
 142     if(!XineramaIsActive(globalconf.display))
 143         return DefaultScreen(globalconf.display);
 144
 145
 146     for(i = 0; i < get_screen_count(); i++)
 147     {
 148         area = get_screen_area(i, NULL, NULL);
 149         if((x < 0 || (x >= area.x && x < area.x + area.width))
 150            && (y < 0 || (y >= area.y && y < area.y + area.height)))
 151             return i;
 152     }
 153     return DefaultScreen(globalconf.display);
 154 }
 155
 156 /** Return the actual screen count
 157  * \return the number of screen available
 158  */
 159 int
 160 get_screen_count(void)
 161 {
 162     int screen_number;
 163
 164     if(XineramaIsActive(globalconf.display))
 165         XineramaQueryScreens(globalconf.display, &screen_number);
 166     else
 167         return ScreenCount(globalconf.display);
 168
 169     return screen_number;
 170 }
 171
 172 /** This returns the real X screen number for a logical
 173  * screen if Xinerama is active.
 174  * \param screen the logical screen
 175  * \return the X screen
 176  */
 177 int
 178 get_phys_screen(int screen)
 179 {
 180     if(XineramaIsActive(globalconf.display))
 181         return DefaultScreen(globalconf.display);
 182     return screen;
 183 }
 184
 185 /** Move a client to a virtual screen
 186  * \param c the client
 187  * \param new_screen The destinatiuon screen
 188  * \param doresize set to True if we also move the client to the new x and
 189  *        y of the new screen
 190  */
 191 void
 192 move_client_to_screen(Client *c, int new_screen, Bool doresize)
 193 {
 194     Tag *tag;
 195     int old_screen = c->screen;
 196     Area from, to;
 197
 198     for(tag = globalconf.screens[old_screen].tags; tag; tag = tag->next)
 199         untag_client(c, tag);
 200
 201     c->screen = new_screen;
 202
 203     /* tag client with new screen tags */
 204     tag_client_with_current_selected(c);
 205
 206     if(doresize && old_screen != c->screen)
 207     {
 208         to = get_screen_area(c->screen, NULL, NULL);
 209         from = get_screen_area(old_screen, NULL, NULL);
 210
 211         /* compute new coords in new screen */
 212         c->rx = (c->rx - from.x) + to.x;
 213         c->ry = (c->ry - from.y) + to.y;
 214         /* check that new coords are still in the screen */
 215         if(c->rw > to.width)
 216             c->rw = to.width;
 217         if(c->rh > to.height)
 218             c->rh = to.height;
 219         if(c->rx + c->rw >= to.x + to.width)
 220             c->rx = to.x + to.width - c->rw - 2 * c->border;
 221         if(c->ry + c->rh >= to.y + to.height)
 222             c->ry = to.y + to.height - c->rh - 2 * c->border;
 223
 224         client_resize(c, c->rx, c->ry, c->rw, c->rh, True, False);
 225     }
 226
 227     focus(c, True, c->screen);
 228
 229     /* redraw statusbar on all screens */
 230     statusbar_draw_all(old_screen);
 231     statusbar_draw_all(new_screen);
 232 }
 233
 234 /** Move mouse pointer to x_org and y_xorg of specified screen
 235  * \param screen screen number
 236  */
 237 static void
 238 move_mouse_pointer_to_screen(int screen)
 239 {
 240     if(XineramaIsActive(globalconf.display))
 241     {
 242         Area area = get_screen_area(screen, NULL, NULL);
 243         XWarpPointer(globalconf.display,
 244                      None,
 245                      DefaultRootWindow(globalconf.display),
 246                      0, 0, 0, 0, area.x, area.y);
 247     }
 248     else
 249         XWarpPointer(globalconf.display,
 250                      None,
 251                      RootWindow(globalconf.display, screen),
 252                      0, 0, 0, 0, 0, 0);
 253 }
 254
 255
 256 /** Switch focus to a specified screen
 257  * \param screen Screen ID
 258  * \param arg screen number
 259  * \ingroup ui_callback
 260  */
 261 void
 262 uicb_screen_focus(int screen, char *arg)
 263 {
 264     int new_screen, numscreens = get_screen_count();
 265
 266     if(arg)
 267         new_screen = compute_new_value_from_arg(arg, screen);
 268     else
 269         new_screen = screen + 1;
 270
 271     if (new_screen < 0)
 272         new_screen = numscreens - 1;
 273     if (new_screen > (numscreens - 1))
 274         new_screen = 0;
 275
 276     focus(focus_get_current_client(new_screen), True, new_screen);
 277
 278     move_mouse_pointer_to_screen(new_screen);
 279 }
 280
 281 /** Move client to a virtual screen (if Xinerama is active)
 282  * \param screen Screen ID
 283  * \param arg screen number
 284  * \ingroup ui_callback
 285  */
 286 void
 287 uicb_client_movetoscreen(int screen __attribute__ ((unused)), char *arg)
 288 {
 289     int new_screen, prev_screen;
 290     Client *sel = globalconf.focus->client;
 291
 292     if(!sel || !XineramaIsActive(globalconf.display))
 293         return;
 294
 295     if(arg)
 296         new_screen = compute_new_value_from_arg(arg, sel->screen);
 297     else
 298         new_screen = sel->screen + 1;
 299
 300     if(new_screen >= get_screen_count())
 301         new_screen = 0;
 302     else if(new_screen < 0)
 303         new_screen = get_screen_count() - 1;
 304
 305     prev_screen = sel->screen;
 306     move_client_to_screen(sel, new_screen, True);
 307     move_mouse_pointer_to_screen(new_screen);
 308     arrange(prev_screen);
 309     arrange(new_screen);
 310 }
 311 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80