From 989c7f34b30198a87948d37e782f48d771336fa1 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Sat, 23 Nov 2019 02:44:54 -0500
Subject: remove some flickering

---
 teleterm-web/src/model.rs       | 15 ++++++++++++++-
 teleterm-web/src/views/watch.rs |  6 +++++-
 2 files changed, 19 insertions(+), 2 deletions(-)

(limited to 'teleterm-web')

diff --git a/teleterm-web/src/model.rs b/teleterm-web/src/model.rs
index 362b4bd..8a22f1b 100644
--- a/teleterm-web/src/model.rs
+++ b/teleterm-web/src/model.rs
@@ -6,6 +6,7 @@ const WATCH_URL: &str = "ws://127.0.0.1:4145/watch";
 struct WatchConn {
     ws: WebSocket,
     term: vt100::Parser,
+    received_data: bool,
 }
 
 impl Drop for WatchConn {
@@ -95,6 +96,13 @@ impl Model {
         self.watch_conn.is_some()
     }
 
+    pub(crate) fn received_data(&self) -> bool {
+        self.watch_conn
+            .as_ref()
+            .map(|conn| conn.received_data)
+            .unwrap_or(false)
+    }
+
     fn watch(&mut self, id: &str, orders: &mut impl Orders<crate::Msg>) {
         let ws = crate::ws::connect(
             &format!("{}?id={}", WATCH_URL, id),
@@ -103,7 +111,11 @@ impl Model {
             orders,
         );
         let term = vt100::Parser::default();
-        self.watch_conn = Some(WatchConn { ws, term })
+        self.watch_conn = Some(WatchConn {
+            ws,
+            term,
+            received_data: false,
+        })
     }
 
     fn update_sessions(&mut self, sessions: Vec<crate::protocol::Session>) {
@@ -117,6 +129,7 @@ impl Model {
     fn process(&mut self, bytes: &[u8]) {
         if let Some(conn) = &mut self.watch_conn {
             conn.term.process(bytes);
+            conn.received_data = true;
         }
     }
 
diff --git a/teleterm-web/src/views/watch.rs b/teleterm-web/src/views/watch.rs
index 5fe7830..cf00fff 100644
--- a/teleterm-web/src/views/watch.rs
+++ b/teleterm-web/src/views/watch.rs
@@ -3,7 +3,11 @@ use crate::prelude::*;
 pub(crate) fn render(model: &crate::model::Model) -> Vec<Node<crate::Msg>> {
     vec![
         if let Some(screen) = model.screen() {
-            crate::views::terminal::render(screen)
+            if model.received_data() {
+                crate::views::terminal::render(screen)
+            } else {
+                seed::empty![]
+            }
         } else {
             seed::empty![]
         },
-- 
cgit v1.2.3-54-g00ecf