gri3-wm/src/fake_outputs.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
*
* Faking outputs is useful in pathological situations (like network X servers
* which dont support multi-monitor in a useful way) and for our testsuite.
*
*/
#include "all.h"
static int num_screens;
/*
* Looks in outputs for the Output whose start coordinates are x, y
*
*/
static Output *get_screen_at(int x, int y) {
Output *output;
TAILQ_FOREACH(output, &outputs, outputs)
if (output->rect.x == x && output->rect.y == y)
return output;
return NULL;
}
/*
* Creates outputs according to the given specification.
* The specification must be in the format wxh+x+y, for example 1024x768+0+0,
* with multiple outputs separated by commas:
* 1900x1200+0+0,1280x1024+1900+0
*
*/
void fake_outputs_init(const char *output_spec) {
char useless_buffer[1024];
const char *walk = output_spec;
unsigned int x, y, width, height;
while (sscanf(walk, "%ux%u+%u+%u", &width, &height, &x, &y) == 4) {
DLOG("Parsed output as width = %u, height = %u at (%u, %u)\n",
width, height, x, y);
Output *new_output = get_screen_at(x, y);
if (new_output != NULL) {
DLOG("Re-used old output %p\n", new_output);
/* This screen already exists. We use the littlest screen so that the user
can always see the complete workspace */
new_output->rect.width = min(new_output->rect.width, width);
new_output->rect.height = min(new_output->rect.height, height);
} else {
new_output = scalloc(sizeof(Output));
sasprintf(&(new_output->name), "fake-%d", num_screens);
DLOG("Created new fake output %s (%p)\n", new_output->name, new_output);
new_output->active = true;
new_output->rect.x = x;
new_output->rect.y = y;
new_output->rect.width = width;
new_output->rect.height = height;
/* We always treat the screen at 0x0 as the primary screen */
if (new_output->rect.x == 0 && new_output->rect.y == 0)
TAILQ_INSERT_HEAD(&outputs, new_output, outputs);
else TAILQ_INSERT_TAIL(&outputs, new_output, outputs);
output_init_con(new_output);
init_ws_for_output(new_output, output_get_content(new_output->con));
num_screens++;
}
/* Figure out how long the input was to skip it */
walk += sprintf(useless_buffer, "%ux%u+%u+%u", width, height, x, y) + 1;
}
if (num_screens == 0) {
ELOG("No screens found. Please fix your setup. i3 will exit now.\n");
exit(0);
}
}