From 53348feb8959754497453232ffacd4bd3f1154ea Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sat, 4 Mar 2017 11:29:31 +0900
Subject: Add --no-clear option

---
 src/options.go   |  6 ++++++
 src/terminal.go  |  4 ++--
 src/tui/light.go | 24 ++++++++++++++++--------
 3 files changed, 24 insertions(+), 10 deletions(-)

(limited to 'src')

diff --git a/src/options.go b/src/options.go
index c78d2bfe..7a3d60cb 100644
--- a/src/options.go
+++ b/src/options.go
@@ -186,6 +186,7 @@ type Options struct {
 	Margin      [4]sizeSpec
 	Bordered    bool
 	Tabstop     int
+	ClearOnExit bool
 	Version     bool
 }
 
@@ -234,6 +235,7 @@ func defaultOptions() *Options {
 		HeaderLines: 0,
 		Margin:      defaultMargin(),
 		Tabstop:     8,
+		ClearOnExit: true,
 		Version:     false}
 }
 
@@ -1099,6 +1101,10 @@ func parseOptions(opts *Options, allArgs []string) {
 				nextString(allArgs, &i, "margin required (TRBL / TB,RL / T,RL,B / T,R,B,L)"))
 		case "--tabstop":
 			opts.Tabstop = nextInt(allArgs, &i, "tab stop required")
+		case "--clear":
+			opts.ClearOnExit = true
+		case "--no-clear":
+			opts.ClearOnExit = false
 		case "--version":
 			opts.Version = true
 		default:
diff --git a/src/terminal.go b/src/terminal.go
index f556badd..3a83bad2 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -316,11 +316,11 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 			}
 			return util.Min(termHeight, util.Max(maxHeight, effectiveMinHeight))
 		}
-		renderer = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop, maxHeightFunc)
+		renderer = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop, opts.ClearOnExit, maxHeightFunc)
 	} else if tui.HasFullscreenRenderer() {
 		renderer = tui.NewFullscreenRenderer(opts.Theme, opts.Black, opts.Mouse)
 	} else {
-		renderer = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop,
+		renderer = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop, opts.ClearOnExit,
 			func(h int) int { return h })
 	}
 	wordRubout := "[^[:alnum:]][[:alnum:]]"
diff --git a/src/tui/light.go b/src/tui/light.go
index fb8f4f03..2af31c4b 100644
--- a/src/tui/light.go
+++ b/src/tui/light.go
@@ -74,6 +74,7 @@ type LightRenderer struct {
 	theme         *ColorTheme
 	mouse         bool
 	forceBlack    bool
+	clearOnExit   bool
 	prevDownTime  time.Time
 	clickY        []int
 	ttyin         *os.File
@@ -106,11 +107,12 @@ type LightWindow struct {
 	bg       Color
 }
 
-func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, maxHeightFunc func(int) int) Renderer {
+func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, maxHeightFunc func(int) int) Renderer {
 	r := LightRenderer{
 		theme:         theme,
 		forceBlack:    forceBlack,
 		mouse:         mouse,
+		clearOnExit:   clearOnExit,
 		ttyin:         openTtyIn(),
 		yoffset:       0,
 		tabstop:       tabstop,
@@ -571,14 +573,20 @@ func (r *LightRenderer) Refresh() {
 
 func (r *LightRenderer) Close() {
 	// r.csi("u")
-	if r.fullscreen {
-		r.rmcup()
-	} else {
-		r.origin()
-		if r.upOneLine {
-			r.csi("A")
+	if r.clearOnExit {
+		if r.fullscreen {
+			r.rmcup()
+		} else {
+			r.origin()
+			if r.upOneLine {
+				r.csi("A")
+			}
+			r.csi("J")
 		}
-		r.csi("J")
+	} else if r.fullscreen {
+		r.csi("G")
+	} else {
+		r.move(r.height, 0)
 	}
 	if r.mouse {
 		r.csi("?1000l")
-- 
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