coursier.cache.internal.ConsoleDim.scala Maven / Gradle / Ivy
package coursier.cache.internal
final class ConsoleDim {
@volatile private var dimsOpt: Option[(Int, Int)] = None
private var initialized = false
private val lock = new Object
// FIXME On Windows, don't cache Terminal.consoleDims()? (should be a - cheap I think - native call)
private def setup(): Unit = {
try SigWinch.addHandler(
new Runnable {
def run(): Unit =
lock.synchronized {
dimsOpt = None
}
}
)
catch {
case _: IllegalArgumentException =>
// ignored
}
initialized = true
}
private def dims(): (Int, Int) =
dimsOpt.getOrElse {
lock.synchronized {
dimsOpt.getOrElse {
if (!initialized)
setup()
val dims = Terminal.consoleDims()
dimsOpt = Some(dims)
dims
}
}
}
def width(): Int =
dims()._1
def height(): Int =
dims()._2
}
object ConsoleDim {
lazy val get: ConsoleDim =
new ConsoleDim
def width(): Int =
get.width()
def height(): Int =
get.height()
}