state: Decide panel arrangement

Combines arrangement with layout to get panel contents as outcome.

Includes some path syntax changes for 2018 compatibility.

src/animation.rs

@@ -8,16 +8,26 @@ use std::time::Duration;
 
 use crate::outputs::OutputId;
 use crate::panel::PixelSize;
+use crate::layout::ArrangementKind;
 
 /// The keyboard should hide after this has elapsed to prevent flickering.
 pub const HIDING_TIMEOUT: Duration = Duration::from_millis(200);
 
+/// Panel contents
+#[derive(PartialEq, Clone, Debug)]
+pub struct Contents {
+    pub name: String,
+    pub kind: ArrangementKind,
+    pub overlay_name: Option<String>,
+}
+
 /// The outwardly visible state of visibility
 #[derive(PartialEq, Debug, Clone)]
 pub enum Outcome {
     Visible {
         output: OutputId,
         height: PixelSize,
+        contents: Contents,
     },
     Hidden,
 }