From 6d0c23c1620862d306977c71228c53c1f4bc460c Mon Sep 17 00:00:00 2001
From: Daniel Konecny <daniel.konecny@broadcom.com>
Date: Fri, 16 Jul 2021 00:03:25 +0200
Subject: [PATCH 1/2] Fix #92

Fprint into the View doesn't scroll correctly content if `Autoscroll` and
`Wrap` are turned on.
It's caused when checking buffer lines while using incorrect slice.
---
 _examples/wrap_autoscroll.go | 70 ++++++++++++++++++++++++++++++++++++
 view.go                      |  2 +-
 2 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 _examples/wrap_autoscroll.go

diff --git a/_examples/wrap_autoscroll.go b/_examples/wrap_autoscroll.go
new file mode 100644
index 0000000..cd50c8a
--- /dev/null
+++ b/_examples/wrap_autoscroll.go
@@ -0,0 +1,70 @@
+// Copyright 2014 The gocui Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"log"
+
+	"github.com/awesome-gocui/gocui"
+)
+
+var tabCount = 0
+
+func main() {
+	g, err := gocui.NewGui(gocui.OutputNormal, true)
+	if err != nil {
+		log.Panicln(err)
+	}
+	defer g.Close()
+
+	g.SetManagerFunc(layout)
+
+	if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding("", gocui.KeyTab, gocui.ModNone, print); err != nil {
+		log.Panicln(err)
+	}
+
+	if err := g.MainLoop(); err != nil && !errors.Is(err, gocui.ErrQuit) {
+		log.Panicln(err)
+	}
+}
+
+func layout(g *gocui.Gui) error {
+	maxX, maxY := g.Size()
+	if v, err := g.SetView("main", maxX/2-7, maxY/2-1, maxX/2+7, maxY/2+4, 0); err != nil {
+		if !errors.Is(err, gocui.ErrUnknownView) {
+			return err
+		}
+
+		if _, err := g.SetCurrentView("main"); err != nil {
+			return err
+		}
+		v.Clear()
+		v.Autoscroll = true
+		v.Wrap = true
+
+		fmt.Fprintln(v, "Hello world!")
+	}
+
+	return nil
+}
+
+func print(g *gocui.Gui, v *gocui.View) error {
+	tabCount++
+	if tabCount%10 == 0 {
+		fmt.Fprintln(v, tabCount, "Hello!")
+	} else {
+		fmt.Fprintln(v, tabCount, "Hello Cruel World !")
+	}
+	return nil
+}
+
+func quit(g *gocui.Gui, v *gocui.View) error {
+	return gocui.ErrQuit
+}
diff --git a/view.go b/view.go
index 4ba42e5..f22ddf0 100644
--- a/view.go
+++ b/view.go
@@ -572,7 +572,7 @@ func (v *View) draw() error {
 	linesToRender := v.viewLines()
 
 	if v.Autoscroll && len(linesToRender) > maxY {
-		v.oy = len(v.lines) - maxY
+		v.oy = len(linesToRender) - maxY - 1
 	}
 
 	newCache := []cellCache{}

From 4bc2c0081fcd0c4fe7948cab62021b1bcb841420 Mon Sep 17 00:00:00 2001
From: Daniel Konecny <daniel.konecny@broadcom.com>
Date: Fri, 16 Jul 2021 14:28:00 +0200
Subject: [PATCH 2/2] Remove unnecessary example

This example just test the autorscroll and wrap together.
This can be recreated by using `active.go` or `custom_frames.go`
example and resize terminal so the text in the second view
will be forced to wrap.
---
 _examples/wrap_autoscroll.go | 70 ------------------------------------
 1 file changed, 70 deletions(-)
 delete mode 100644 _examples/wrap_autoscroll.go

diff --git a/_examples/wrap_autoscroll.go b/_examples/wrap_autoscroll.go
deleted file mode 100644
index cd50c8a..0000000
--- a/_examples/wrap_autoscroll.go
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright 2014 The gocui Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-	"errors"
-	"fmt"
-	"log"
-
-	"github.com/awesome-gocui/gocui"
-)
-
-var tabCount = 0
-
-func main() {
-	g, err := gocui.NewGui(gocui.OutputNormal, true)
-	if err != nil {
-		log.Panicln(err)
-	}
-	defer g.Close()
-
-	g.SetManagerFunc(layout)
-
-	if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
-		log.Panicln(err)
-	}
-	if err := g.SetKeybinding("", gocui.KeyTab, gocui.ModNone, print); err != nil {
-		log.Panicln(err)
-	}
-
-	if err := g.MainLoop(); err != nil && !errors.Is(err, gocui.ErrQuit) {
-		log.Panicln(err)
-	}
-}
-
-func layout(g *gocui.Gui) error {
-	maxX, maxY := g.Size()
-	if v, err := g.SetView("main", maxX/2-7, maxY/2-1, maxX/2+7, maxY/2+4, 0); err != nil {
-		if !errors.Is(err, gocui.ErrUnknownView) {
-			return err
-		}
-
-		if _, err := g.SetCurrentView("main"); err != nil {
-			return err
-		}
-		v.Clear()
-		v.Autoscroll = true
-		v.Wrap = true
-
-		fmt.Fprintln(v, "Hello world!")
-	}
-
-	return nil
-}
-
-func print(g *gocui.Gui, v *gocui.View) error {
-	tabCount++
-	if tabCount%10 == 0 {
-		fmt.Fprintln(v, tabCount, "Hello!")
-	} else {
-		fmt.Fprintln(v, tabCount, "Hello Cruel World !")
-	}
-	return nil
-}
-
-func quit(g *gocui.Gui, v *gocui.View) error {
-	return gocui.ErrQuit
-}