fix #341: make is_hidden() work for MultiProgress

src/draw_target.rs

@@ -102,6 +102,7 @@ impl ProgressDrawTarget {
         match self.kind {
             TargetKind::Hidden => true,
             TargetKind::Term { ref term, .. } => !term.is_term(),
+            TargetKind::Multi { ref state, .. } => state.read().unwrap().is_hidden(),
             _ => false,
         }
     }
@@ -434,3 +435,21 @@ impl DrawState {
         self.orphan_lines = 0;
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::{MultiProgress, ProgressBar, ProgressDrawTarget};
+
+    #[test]
+    fn multi_is_hidden() {
+        let mp = MultiProgress::with_draw_target(ProgressDrawTarget::hidden());
+
+        let pb = mp.add(ProgressBar::new(100));
+        assert!(mp.is_hidden());
+        assert!(pb.is_hidden());
+
+        mp.set_draw_target(ProgressDrawTarget::stdout());
+        assert!(!mp.is_hidden());
+        assert!(!pb.is_hidden());
+    }
+}

src/multi.rs

@@ -159,6 +159,10 @@ impl MultiProgress {
     pub fn clear(&self) -> io::Result<()> {
         self.state.write().unwrap().clear(Instant::now())
     }
+
+    pub fn is_hidden(&self) -> bool {
+        self.state.read().unwrap().is_hidden()
+    }
 }
 
 #[derive(Debug)]
@@ -256,6 +260,10 @@ impl MultiState {
         DrawStateWrapper::for_multi(state, orphans)
     }
 
+    pub(crate) fn is_hidden(&self) -> bool {
+        self.draw_target.is_hidden()
+    }
+
     pub(crate) fn suspend<F: FnOnce() -> R, R>(&mut self, f: F, now: Instant) -> R {
         self.clear(now).unwrap();
         let ret = f();