bash/x-mouse/xwarppointer/main.c

   1 #include <sys/types.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <ctype.h>
   6 #include <stdarg.h>
   7
   8 #include <X11/X.h>
   9 #include <X11/Xlib.h>
  10 #include <X11/Xutil.h>
  11
  12 void
  13 usage(const char *err, ...)
  14 {
  15     va_list va;
  16     va_start(va, err);
  17
  18     fprintf(stderr, "ERROR: ");
  19     vfprintf(stderr, err, va);
  20
  21     va_end(va);
  22
  23     fprintf(stderr, "\n"
  24 "usage: xwarppointer <command> <args>\n\n"
  25 " commands:\n"
  26 "   screen <+/-> | <screen #>       Move cursor to specific screen, or        \n"
  27 "                                   relative to current one. Does not change  \n"
  28 "                                   the cursor's position on the screen.      \n"
  29 "\n"
  30 "   abspos <x|.> <y|.>              Moves cursor to given X and Y coordinates.\n"
  31 "                                   If . is specified instead of a #, it      \n"
  32 "                                   doesn't change that axis.                 \n"
  33 "\n"
  34 "   relpos <x offset> <y offset>    Move the cursor relative to its current   \n"
  35 "                                   position.                                 \n"
  36 "\n"
  37 "   get                             Return the cursors position.              \n"
  38 "\n");
  39     exit(1);
  40 }
  41
  42 int
  43 myatoi(const char *str, int *ret) {
  44     char *p;
  45     int i;
  46
  47     i = strtod(str, &p);
  48     if (p == str)
  49         return 0;
  50     *ret = i;
  51     return 1;
  52 }
  53
  54 int
  55 main(int argc, char *argv[])
  56 {
  57     Display *display;
  58     Window root;
  59
  60     if ((display = XOpenDisplay(NULL)) == NULL) {
  61         fprintf(stderr, "Cannot open local X-display.\n");
  62         exit(1);
  63     }
  64     root = DefaultRootWindow(display);
  65
  66     if (argc < 2) usage("wrong number of args");
  67
  68     if (!strcasecmp(argv[1], "screen")) {
  69         Window fromroot, tmpwin;
  70         XWindowAttributes attr;
  71         int screen = -1, rot, x, y, tmp;
  72
  73         if (argc != 3)
  74             usage("screen: wrong number of args");
  75
  76         if (*argv[2] == '+')
  77             rot = 1;
  78         else if (*argv[2] == '-')
  79             rot = -1;
  80         else
  81             screen = atoi(argv[2]);
  82
  83         XQueryPointer(display, root, &fromroot, &tmpwin, &x, &y, &tmp, &tmp, &tmp);
  84
  85         if (screen == -1) {
  86             XGetWindowAttributes(display, fromroot, &attr);
  87             screen = XScreenNumberOfScreen(attr.screen);
  88
  89             screen += rot;
  90             if (screen >= ScreenCount(display))
  91                 screen -= ScreenCount(display);
  92             if (screen < 0)
  93                 screen += ScreenCount(display);
  94
  95         } else {
  96             if (screen >= ScreenCount(display) || screen < 0) {
  97                 fprintf(stderr, "Cannot get root window of screen!\n");
  98                 exit(1);
  99             }
 100         }
 101
 102         root = RootWindow(display, screen);
 103         XWarpPointer(display, None, root, 0, 0, 0, 0, x, y);
 104         XFlush(display);
 105
 106     } else if (!strcasecmp(argv[1], "abspos")) {
 107         int x, y, tmp;
 108         Window fromroot, tmpwin;
 109
 110         if (argc != 4)
 111             usage("abspos: wrong number of args");
 112
 113         XQueryPointer(display, root, &fromroot, &tmpwin, &x, &y, &tmp, &tmp, &tmp);
 114
 115         if (argv[2][0] != '.')
 116             if (!myatoi(argv[2], &x))
 117                 usage("abspos: invalid x pos: %s", argv[2]);
 118         if (argv[3][0] != '.')
 119             if (!myatoi(argv[3], &y))
 120                 usage("abspos: invalid y pos: %s", argv[3]);
 121
 122         XWarpPointer(display, None, root, 0, 0, 0, 0, x, y);
 123         XFlush(display);
 124
 125     } else if (!strcasecmp(argv[1], "relpos")) {
 126         int x, y, tmp, x2, y2;
 127         Window fromroot, tmpwin;
 128
 129         if (argc != 4)
 130             usage("relpos: wrong number of args");
 131
 132         XQueryPointer(display, root, &fromroot, &tmpwin, &x, &y, &tmp, &tmp, &tmp);
 133
 134         if (!myatoi(argv[2], &x2)) usage("relpos: invalid x pos: %s", argv[2]);
 135         if (!myatoi(argv[3], &y2)) usage("relpos: invalid y pos: %s", argv[3]);
 136         x += x2;
 137         y += y2;
 138
 139         XWarpPointer(display, None, root, 0, 0, 0, 0, x, y);
 140         XFlush(display);
 141
 142     } else if (!strcasecmp(argv[1], "get")) {
 143         int x, y, tmp;
 144         Window fromroot, tmpwin;
 145
 146         if (argc != 2)
 147             usage("get: wrong number of args");
 148
 149         XQueryPointer(display, root, &fromroot, &tmpwin, &x, &y, &tmp, &tmp, &tmp);
 150
 151         printf("%d %d\n", x, y);
 152
 153     } else {
 154         usage("invalid command: %s", argv[1]);
 155     }
 156
 157     exit(0);
 158 }