git.sur5r.net Git - i3/i3/blob - src/xinerama.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * (c) 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 #include <xcb/xcb.h>
  16 #include <xcb/xinerama.h>
  17
  18 #include "queue.h"
  19 #include "i3.h"
  20 #include "data.h"
  21 #include "table.h"
  22 #include "util.h"
  23 #include "xinerama.h"
  24
  25 /* This TAILQ of Rects stores the virtual screens, used for handling overlapping screens
  26  * (xrandr --same-as) */
  27 struct screens_head virtual_screens;
  28
  29 i3Screen *get_screen_at(int x, int y) {
  30         i3Screen *screen;
  31         TAILQ_FOREACH(screen, &virtual_screens, screens)
  32                 if (screen->rect.x == x && screen->rect.y == y)
  33                         return screen;
  34
  35         return NULL;
  36 }
  37
  38 i3Screen *get_screen_containing(int x, int y) {
  39         i3Screen *screen;
  40         TAILQ_FOREACH(screen, &virtual_screens, screens)
  41                 if (x > screen->rect.x && x < (screen->rect.x + screen->rect.width) &&
  42                     y > screen->rect.y && y < (screen->rect.y + screen->rect.height))
  43                         return screen;
  44
  45         return NULL;
  46 }
  47
  48
  49 /*
  50  * We have just established a connection to the X server and need the initial Xinerama
  51  * information to setup workspaces for each screen.
  52  *
  53  */
  54 void initialize_xinerama(xcb_connection_t *conn) {
  55         xcb_xinerama_query_screens_reply_t *reply;
  56         xcb_xinerama_screen_info_t *screen_info;
  57         int screen;
  58
  59         if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
  60                 printf("Xinerama extension not found, disabling.\n");
  61                 return;
  62         }
  63
  64         if (!xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL)->state) {
  65                 printf("Xinerama is not active (in your X-Server), disabling.\n");
  66                 return;
  67         }
  68
  69         reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
  70         if (!reply) {
  71                 printf("Couldn’t get active Xinerama screens\n");
  72                 return;
  73         }
  74         screen_info = xcb_xinerama_query_screens_screen_info(reply);
  75         num_screens = xcb_xinerama_query_screens_screen_info_length(reply);
  76
  77         TAILQ_INIT(&virtual_screens);
  78
  79         /* Just go through each workspace and associate as many screens as we can. */
  80         for (screen = 0; screen < num_screens; screen++) {
  81                 i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org);
  82                 if (s!= NULL) {
  83                         /* This screen already exists. We use the littlest screen so that the user
  84                            can always see the complete workspace */
  85                         s->rect.width = min(s->rect.width, screen_info[screen].width);
  86                         s->rect.height = min(s->rect.height, screen_info[screen].height);
  87                 } else {
  88                         s = calloc(sizeof(Screen), 1);
  89                         s->rect.x = screen_info[screen].x_org;
  90                         s->rect.y = screen_info[screen].y_org;
  91                         s->rect.width = screen_info[screen].width;
  92                         s->rect.height = screen_info[screen].height;
  93                         TAILQ_INSERT_TAIL(&virtual_screens, s, screens);
  94                 }
  95
  96                 printf("found Xinerama screen: %d x %d at %d x %d\n",
  97                                 screen_info[screen].width, screen_info[screen].height,
  98                                 screen_info[screen].x_org, screen_info[screen].y_org);
  99         }
 100
 101         i3Screen *s;
 102         num_screens = 0;
 103         TAILQ_FOREACH(s, &virtual_screens, screens) {
 104                 s->num = num_screens;
 105                 s->current_workspace = num_screens;
 106                 workspaces[num_screens].screen = s;
 107                 memcpy(&(workspaces[num_screens++].rect), &(s->rect), sizeof(Rect));
 108                 printf("that is virtual screen at %d x %d with %d x %d\n",
 109                                 s->rect.x, s->rect.y, s->rect.width, s->rect.height);
 110         }
 111
 112         free(screen_info);
 113 }