From 892aae267d3f6678532cdaf13ce517fcd4111106 Mon Sep 17 00:00:00 2001
From: rezural <69941255+rezural@users.noreply.github.com>
Date: Wed, 17 Feb 2021 07:02:13 +1100
Subject: [PATCH] add height method to Host trait, and implementors (#3064)

---
 crates/nu-engine/src/env/basic_host.rs | 5 +++++
 crates/nu-engine/src/env/host.rs       | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/crates/nu-engine/src/env/basic_host.rs b/crates/nu-engine/src/env/basic_host.rs
index 310d645f55..1dd521c5b3 100644
--- a/crates/nu-engine/src/env/basic_host.rs
+++ b/crates/nu-engine/src/env/basic_host.rs
@@ -74,4 +74,9 @@ impl Host for BasicHost {
         term_width -= 1;
         term_width
     }
+
+    fn height(&self) -> usize {
+        let (_, term_height) = term_size::dimensions().unwrap_or((80, 20));
+        term_height
+    }
 }
diff --git a/crates/nu-engine/src/env/host.rs b/crates/nu-engine/src/env/host.rs
index 6496546ba3..f768b38032 100644
--- a/crates/nu-engine/src/env/host.rs
+++ b/crates/nu-engine/src/env/host.rs
@@ -15,6 +15,7 @@ pub trait Host: Debug + Send {
     fn env_rm(&mut self, k: OsString);
 
     fn width(&self) -> usize;
+    fn height(&self) -> usize;
 }
 
 impl Host for Box<dyn Host> {
@@ -53,6 +54,10 @@ impl Host for Box<dyn Host> {
     fn width(&self) -> usize {
         (**self).width()
     }
+
+    fn height(&self) -> usize {
+        (**self).height()
+    }
 }
 
 #[derive(Debug)]
@@ -124,4 +129,8 @@ impl Host for FakeHost {
     fn width(&self) -> usize {
         1
     }
+
+    fn height(&self) -> usize {
+        1
+    }
 }