HelenOS sources

wdecor_corner_w   962 uspace/lib/ui/src/wdecor.c 	cleft = (pos->x < wdecor->rect.p0.x + wdecor_corner_w);
wdecor_corner_w   963 uspace/lib/ui/src/wdecor.c 	cright = (pos->x >= wdecor->rect.p1.x - wdecor_corner_w);
HelenOS homepage, sources at GitHub