From 8bc975a858d07e48f3e7cf3778aadce6688a3d69 Mon Sep 17 00:00:00 2001
From: Gokcehan <gokcehankara@gmail.com>
Date: Thu, 16 Mar 2017 16:22:42 +0300
Subject: [PATCH] add wrapscan option for cyclic search

Mentioned in #57.
---
 comp.go      |  3 +++
 doc.go       |  1 +
 docstring.go |  1 +
 eval.go      |  6 ++++++
 nav.go       | 20 ++++++++++++--------
 opts.go      |  2 ++
 6 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/comp.go b/comp.go
index e070d6f..4340a67 100644
--- a/comp.go
+++ b/comp.go
@@ -59,6 +59,9 @@ var (
 		"reverse",
 		"noreverse",
 		"reverse!",
+		"wrapscan",
+		"nowrapscan",
+		"wrapscan!",
 		"scrolloff",
 		"tabstop",
 		"filesep",
diff --git a/doc.go b/doc.go
index 38c4cc4..4efad37 100644
--- a/doc.go
+++ b/doc.go
@@ -70,6 +70,7 @@ The following options can be used to customize the behavior of lf:
     hidden     boolean  (default off)
     preview    boolean  (default on)
     reverse    boolean  (default off)
+    wrapscan   boolean  (default on)
     scrolloff  integer  (default 0)
     tabstop    integer  (default 8)
     filesep    string   (default ":")
diff --git a/docstring.go b/docstring.go
index e7b4821..4fb6725 100644
--- a/docstring.go
+++ b/docstring.go
@@ -74,6 +74,7 @@ The following options can be used to customize the behavior of lf:
     hidden     boolean  (default off)
     preview    boolean  (default on)
     reverse    boolean  (default off)
+    wrapscan   boolean  (default on)
     scrolloff  integer  (default 0)
     tabstop    integer  (default 8)
     filesep    string   (default ":")
diff --git a/eval.go b/eval.go
index cfead6b..94a1df8 100644
--- a/eval.go
+++ b/eval.go
@@ -44,6 +44,12 @@ func (e *setExpr) eval(app *app, args []string) {
 	case "reverse!":
 		gOpts.reverse = !gOpts.reverse
 		app.nav.renew(app.nav.height)
+	case "wrapscan":
+		gOpts.wrapscan = true
+	case "nowrapscan":
+		gOpts.wrapscan = false
+	case "wrapscan!":
+		gOpts.wrapscan = !gOpts.wrapscan
 	case "scrolloff":
 		n, err := strconv.Atoi(e.val)
 		if err != nil {
diff --git a/nav.go b/nav.go
index 8451d59..95acee8 100644
--- a/nav.go
+++ b/nav.go
@@ -372,10 +372,12 @@ func (nav *nav) searchNext() {
 			return
 		}
 	}
-	for i := 0; i < last.ind; i++ {
-		if strings.Contains(last.fi[i].Name(), nav.search) {
-			nav.up(last.ind - i)
-			return
+	if gOpts.wrapscan {
+		for i := 0; i < last.ind; i++ {
+			if strings.Contains(last.fi[i].Name(), nav.search) {
+				nav.up(last.ind - i)
+				return
+			}
 		}
 	}
 }
@@ -388,10 +390,12 @@ func (nav *nav) searchPrev() {
 			return
 		}
 	}
-	for i := len(last.fi) - 1; i > last.ind; i-- {
-		if strings.Contains(last.fi[i].Name(), nav.search) {
-			nav.down(i - last.ind)
-			return
+	if gOpts.wrapscan {
+		for i := len(last.fi) - 1; i > last.ind; i-- {
+			if strings.Contains(last.fi[i].Name(), nav.search) {
+				nav.down(i - last.ind)
+				return
+			}
 		}
 	}
 }
diff --git a/opts.go b/opts.go
index da6113d..afa7998 100644
--- a/opts.go
+++ b/opts.go
@@ -7,6 +7,7 @@ var gOpts struct {
 	hidden    bool
 	preview   bool
 	reverse   bool
+	wrapscan  bool
 	scrolloff int
 	tabstop   int
 	filesep   string
@@ -27,6 +28,7 @@ func init() {
 	gOpts.hidden = false
 	gOpts.preview = true
 	gOpts.reverse = false
+	gOpts.wrapscan = true
 	gOpts.scrolloff = 0
 	gOpts.tabstop = 8
 	gOpts.filesep = ":"