From d20bd3e8220d4e0eb828ddd7a272753f1ad9fd8a Mon Sep 17 00:00:00 2001
From: Michael Dvorkin <mike@dvorkin.net>
Date: Tue, 23 Jul 2013 11:43:24 -0700
Subject: [PATCH] Minor simplification

---
 lib/format.go | 2 +-
 lib/screen.go | 6 ++++++
 mop.go        | 3 +--
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/format.go b/lib/format.go
index 549dbf5..c9222a2 100644
--- a/lib/format.go
+++ b/lib/format.go
@@ -149,7 +149,7 @@ func last_of_pair(str string) string {
 
 //-----------------------------------------------------------------------------
 func with_currency(str string) string {
-	if str == `N/A` || str == `0.00` {
+	if str == `N/A` {
 		return `-`
 	} else {
 		switch str[0:1] {
diff --git a/lib/screen.go b/lib/screen.go
index 3709877..85d6659 100644
--- a/lib/screen.go
+++ b/lib/screen.go
@@ -13,6 +13,7 @@ import (
 type Screen struct {
 	width	int
 	height	int
+	cleared bool
 	tags	map[string]termbox.Attribute
 }
 
@@ -44,12 +45,14 @@ func (self *Screen) Initialize() *Screen {
 //-----------------------------------------------------------------------------
 func (self *Screen) Resize() *Screen {
 	self.width, self.height = termbox.Size()
+	self.cleared = false
 	return self
 }
 
 //-----------------------------------------------------------------------------
 func (self *Screen) Clear() *Screen {
 	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
+	self.cleared = true
 	return self
 }
 
@@ -121,6 +124,9 @@ func (self *Screen) DrawLine(x int, y int, str string) {
 // private
 //-----------------------------------------------------------------------------
 func (self *Screen) draw(str string) {
+	if !self.cleared {
+		self.Clear()
+	}
 	for row, line := range strings.Split(str, "\n") {
 		self.DrawLine(0, row, line)
 	}
diff --git a/mop.go b/mop.go
index cd95946..10257d0 100644
--- a/mop.go
+++ b/mop.go
@@ -24,7 +24,6 @@ func mainLoop(screen *mop.Screen, profile *mop.Profile) {
 
 	market := new(mop.Market).Initialize().Fetch()
 	quotes := new(mop.Quotes).Initialize(market, profile)
-	screen.Clear()
 	screen.DrawMarket(market)
 	screen.DrawQuotes(quotes)
 
@@ -48,7 +47,7 @@ loop:
 					}
 				}
 			case termbox.EventResize:
-				screen.Resize().Clear()
+				screen.Resize()
 				screen.DrawMarket(market)
 				screen.DrawQuotes(quotes)
 			}