The maximum travel distance between points on a desktop is substantially
reduced if the pointer is allowed to travel off a screen edge and reappear at
the opposite edge. taralli is a tiny standalone program for X Windows which,
while running, implements this functionality. In other words, it changes the
topology of the desktop to be that of a torus.
taralli has been tested on GNU/Linux and is likely portable to other X
platforms. I would appreciate any bug reports and patches, which you can
submit through GitHub.
For the common case of a rectangular desktop, you can build and run taralli
like so:
$ ./configure
$ make
$ sudo make install
$ taralli
Perhaps you have a non-rectangular desktop, composed of several monitors at
different resolutions. Or you might have different preferences for where the
mouse pointer goes when it reaches a screen edge. taralli supports a simple
form of customization; see map_beef.c for an example. You define a C
function
void map(int *x, int *y);
which receives pointers to the current mouse coordinates, and is allowed to
modify those coordinates. A macro WRAP(var, from, to) is available; it
expands to (roughly)
if (*var == from) {
*var = to;
return;
}
Another function
void map_init(Display *dpy);
will run at program start.
You can build and run the customized program with e.g.
$ ./configure --enable-custom-map=beef
$ make
$ ./taralli
taralli is available under a BSD license. See the LICENSE file.