From 341607b7512731131f355e0a2932e158f434d30b Mon Sep 17 00:00:00 2001
From: neeshy <neeshy@tfwno.gf>
Date: Mon, 18 Jan 2021 17:27:03 -0500
Subject: [PATCH 1/2] Use ranged for loop over channel

And rename variable "path" to "prev"
---
 nav.go | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/nav.go b/nav.go
index 2b25fbf7..9f53d4bd 100644
--- a/nav.go
+++ b/nav.go
@@ -460,18 +460,14 @@ func (nav *nav) position() {
 }
 
 func (nav *nav) previewLoop(ui *ui) {
-	var path string
-	for {
-		p, ok := <-nav.previewChan
-		if !ok {
-			return
-		}
-		if len(p) != 0 {
+	var prev string
+	for path := range nav.previewChan {
+		if len(path) != 0 {
 			win := ui.wins[len(ui.wins)-1]
-			nav.preview(p, win)
-			path = p
+			nav.preview(path, win)
+			prev = path
 		} else if len(gOpts.previewer) != 0 && len(gOpts.cleaner) != 0 && nav.volatilePreview {
-			cmd := exec.Command(gOpts.cleaner, path)
+			cmd := exec.Command(gOpts.cleaner, prev)
 			if err := cmd.Run(); err != nil {
 				log.Printf("cleaning preview: %s", err)
 			}

From 1e2415f0dbc5a36a8f9e64378a8ebac6e8ba15c5 Mon Sep 17 00:00:00 2001
From: neeshy <neeshy@tfwno.gf>
Date: Mon, 18 Jan 2021 17:28:42 -0500
Subject: [PATCH 2/2] Exhaust queued entries in previewChan prior to calling
 preview script

---
 nav.go | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/nav.go b/nav.go
index 9f53d4bd..b620c5e4 100644
--- a/nav.go
+++ b/nav.go
@@ -462,17 +462,33 @@ func (nav *nav) position() {
 func (nav *nav) previewLoop(ui *ui) {
 	var prev string
 	for path := range nav.previewChan {
-		if len(path) != 0 {
-			win := ui.wins[len(ui.wins)-1]
-			nav.preview(path, win)
-			prev = path
-		} else if len(gOpts.previewer) != 0 && len(gOpts.cleaner) != 0 && nav.volatilePreview {
+		var clear bool
+		if len(path) == 0 {
+			clear = true
+		}
+	loop:
+		for {
+			select {
+			case path = <-nav.previewChan:
+				if len(path) == 0 {
+					clear = true
+				}
+			default:
+				break loop
+			}
+		}
+		if clear && len(gOpts.previewer) != 0 && len(gOpts.cleaner) != 0 && nav.volatilePreview {
 			cmd := exec.Command(gOpts.cleaner, prev)
 			if err := cmd.Run(); err != nil {
 				log.Printf("cleaning preview: %s", err)
 			}
 			nav.volatilePreview = false
 		}
+		if len(path) != 0 {
+			win := ui.wins[len(ui.wins)-1]
+			nav.preview(path, win)
+			prev = path
+		}
 	}
 }