From d34e4cf6984a139c12646d21771526e1e2a6f4f7 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Fri, 28 Apr 2017 22:58:08 +0900
Subject: Support CTRL-Z (SIGSTOP)

---
 src/tui/dummy.go   | 12 ++++++------
 src/tui/light.go   | 38 +++++++++++++++++++++++---------------
 src/tui/ncurses.go |  5 ++---
 src/tui/tcell.go   |  9 +++------
 src/tui/tui.go     |  4 ++--
 5 files changed, 36 insertions(+), 32 deletions(-)

(limited to 'src/tui')

diff --git a/src/tui/dummy.go b/src/tui/dummy.go
index 60a23fb6..c96ce8eb 100644
--- a/src/tui/dummy.go
+++ b/src/tui/dummy.go
@@ -25,13 +25,13 @@ const (
 	Reverse          = Attr(1 << 6)
 )
 
-func (r *FullscreenRenderer) Init()    {}
-func (r *FullscreenRenderer) Pause()   {}
-func (r *FullscreenRenderer) Clear()   {}
-func (r *FullscreenRenderer) Refresh() {}
-func (r *FullscreenRenderer) Close()   {}
+func (r *FullscreenRenderer) Init()       {}
+func (r *FullscreenRenderer) Pause(bool)  {}
+func (r *FullscreenRenderer) Resume(bool) {}
+func (r *FullscreenRenderer) Clear()      {}
+func (r *FullscreenRenderer) Refresh()    {}
+func (r *FullscreenRenderer) Close()      {}
 
-func (r *FullscreenRenderer) Resume() bool       { return false }
 func (r *FullscreenRenderer) DoesAutoWrap() bool { return false }
 func (r *FullscreenRenderer) IsOptimized() bool  { return false }
 func (r *FullscreenRenderer) GetChar() Event     { return Event{} }
diff --git a/src/tui/light.go b/src/tui/light.go
index 7819050c..be6950c8 100644
--- a/src/tui/light.go
+++ b/src/tui/light.go
@@ -522,27 +522,35 @@ func (r *LightRenderer) rmcup() {
 	r.csi("?1049l")
 }
 
-func (r *LightRenderer) Pause() {
+func (r *LightRenderer) Pause(clear bool) {
 	terminal.Restore(r.fd(), r.origState)
-	if r.fullscreen {
-		r.rmcup()
-	} else {
-		r.smcup()
-		r.csi("H")
+	if clear {
+		if r.fullscreen {
+			r.rmcup()
+		} else {
+			r.smcup()
+			r.csi("H")
+		}
+		r.flush()
 	}
-	r.flush()
 }
 
-func (r *LightRenderer) Resume() bool {
+func (r *LightRenderer) Resume(clear bool) {
 	terminal.MakeRaw(r.fd())
-	if r.fullscreen {
-		r.smcup()
-	} else {
-		r.rmcup()
+	if clear {
+		if r.fullscreen {
+			r.smcup()
+		} else {
+			r.rmcup()
+		}
+		r.flush()
+	} else if !r.fullscreen && r.mouse {
+		// NOTE: Resume(false) is only called on SIGCONT after SIGSTOP.
+		// And It's highly likely that the offset we obtained at the beginning will
+		// no longer be correct, so we simply disable mouse input.
+		r.csi("?1000l")
+		r.mouse = false
 	}
-	r.flush()
-	// Should redraw
-	return true
 }
 
 func (r *LightRenderer) Clear() {
diff --git a/src/tui/ncurses.go b/src/tui/ncurses.go
index ba3a1cfb..3263c397 100644
--- a/src/tui/ncurses.go
+++ b/src/tui/ncurses.go
@@ -176,12 +176,11 @@ func initPairs(theme *ColorTheme) {
 	}
 }
 
-func (r *FullscreenRenderer) Pause() {
+func (r *FullscreenRenderer) Pause(bool) {
 	C.endwin()
 }
 
-func (r *FullscreenRenderer) Resume() bool {
-	return false
+func (r *FullscreenRenderer) Resume(bool) {
 }
 
 func (r *FullscreenRenderer) Close() {
diff --git a/src/tui/tcell.go b/src/tui/tcell.go
index bda5d082..3a8c7655 100644
--- a/src/tui/tcell.go
+++ b/src/tui/tcell.go
@@ -282,7 +282,7 @@ func (r *FullscreenRenderer) GetChar() Event {
 			return Event{keyfn('z'), 0, nil}
 		case tcell.KeyCtrlSpace:
 			return Event{CtrlSpace, 0, nil}
-		case tcell.KeyBackspace, tcell.KeyBackspace2:
+		case tcell.KeyBackspace2:
 			if alt {
 				return Event{AltBS, 0, nil}
 			}
@@ -308,8 +308,6 @@ func (r *FullscreenRenderer) GetChar() Event {
 		case tcell.KeyPgDn:
 			return Event{PgDn, 0, nil}
 
-		case tcell.KeyTab:
-			return Event{Tab, 0, nil}
 		case tcell.KeyBacktab:
 			return Event{BTab, 0, nil}
 
@@ -366,13 +364,12 @@ func (r *FullscreenRenderer) GetChar() Event {
 	return Event{Invalid, 0, nil}
 }
 
-func (r *FullscreenRenderer) Pause() {
+func (r *FullscreenRenderer) Pause(bool) {
 	_screen.Fini()
 }
 
-func (r *FullscreenRenderer) Resume() bool {
+func (r *FullscreenRenderer) Resume(bool) {
 	r.initScreen()
-	return true
 }
 
 func (r *FullscreenRenderer) Close() {
diff --git a/src/tui/tui.go b/src/tui/tui.go
index d360c4ec..c638b35a 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -206,8 +206,8 @@ const (
 
 type Renderer interface {
 	Init()
-	Pause()
-	Resume() bool
+	Pause(clear bool)
+	Resume(clear bool)
 	Clear()
 	RefreshWindows(windows []Window)
 	Refresh()
-- 
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