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/* Title: Pure/System/jfx_thread.scala
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Module: PIDE
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Author: Makarius
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Evaluation within the Java FX application thread.
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*/
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package isabelle
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import javafx.application.{Platform => JFX_Platform}
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object JFX_Thread
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{
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/* checks */
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def assert() = Predef.assert(JFX_Platform.isFxApplicationThread())
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def require() = Predef.require(JFX_Platform.isFxApplicationThread())
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/* asynchronous context switch */
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def later(body: => Unit)
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{
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if (JFX_Platform.isFxApplicationThread()) body
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else JFX_Platform.runLater(new Runnable { def run = body })
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}
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def future[A](body: => A): Future[A] =
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{
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if (JFX_Platform.isFxApplicationThread()) Future.value(body)
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else {
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val promise = Future.promise[A]
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later { promise.fulfill_result(Exn.capture(body)) }
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promise
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}
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}
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}
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