From 7090a2c0d57489d25a63ee264441c2675731130a Mon Sep 17 00:00:00 2001
From: root <root@turin.home>
Date: Thu, 5 May 2022 00:37:18 +0100
Subject: [PATCH] Scrolling performance - redraw old quotes.

Rather than fetching quotes each time we need to redraw them becuase the
user has scrolled the screen, just redraw the old quotes.
---
 cmd/mop/main.go | 2 +-
 screen.go       | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmd/mop/main.go b/cmd/mop/main.go
index 83e6f82..ec34be6 100644
--- a/cmd/mop/main.go
+++ b/cmd/mop/main.go
@@ -168,7 +168,7 @@ loop:
 		}
 
 		if redrawQuotesFlag && len(keyboardQueue) == 0 {
-			screen.Draw(quotes)
+			screen.DrawOldQuotes(quotes)
 			redrawQuotesFlag = false
 		}
 	}
diff --git a/screen.go b/screen.go
index 28c1dac..1159dfa 100644
--- a/screen.go
+++ b/screen.go
@@ -119,6 +119,12 @@ func (screen *Screen) ScrollBottom(max int) {
 	}
 }
 
+func (screen *Screen) DrawOldQuotes(quotes *Quotes) {
+    screen.draw(screen.layout.Quotes(quotes), true)
+    termbox.Flush()
+}
+
+
 // Draw accepts variable number of arguments and knows how to display the
 // market data, stock quotes, current time, and an arbitrary string.
 func (screen *Screen) Draw(objects ...interface{}) *Screen {