fix: reset sixel state if new file is loading (gokcehan#2301)

* fix: reset sixel state if new file is loading

* Update `CHANGELOG.md`

Author: joelim-work

CHANGELOG.md

@@ -8,6 +8,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 - `Added`
 - `Fixed`
 
+## r41 (Unreleased)
+
+### Fixed
+
+- A bug where sixel images fail to display when scrolling back and forth is now fixed (#2301).
+
 ## [r40](https://github.com/gokcehan/lf/releases/tag/r40)
 
 ### Fixed

sixel.go

@@ -28,11 +28,6 @@ func (sxs *sixelScreen) printSixel(win *win, screen tcell.Screen, reg *reg) {
 		return
 	}
 
-	if !reg.sixel {
-		sxs.lastFile = ""
-		return
-	}
-
 	cw, ch, err := cellSize(screen)
 	if err != nil {
 		log.Printf("sixel: %s", err)

ui.go

@@ -244,15 +244,15 @@ func (win *win) printRight(screen tcell.Screen, y int, st tcell.Style, s string)
 }
 
 func (win *win) printReg(screen tcell.Screen, reg *reg, previewLoading bool, sxs *sixelScreen) {
-	if reg.loading {
+	switch {
+	case reg.loading:
 		if previewLoading {
 			st := tcell.StyleDefault.Reverse(true)
 			win.print(screen, 2, 0, st, "loading...")
 		}
-		return
-	}
-
-	if !reg.sixel {
+	case reg.sixel:
+		sxs.printSixel(win, screen, reg)
+	default:
 		st := tcell.StyleDefault
 		for i, l := range reg.lines {
 			if i > win.h-1 {
@@ -263,7 +263,9 @@ func (win *win) printReg(screen tcell.Screen, reg *reg, previewLoading bool, sxs
 		}
 	}
 
-	sxs.printSixel(win, screen, reg)
+	if !reg.sixel {
+		sxs.lastFile = ""
+	}
 }
 
 var gThisYear = time.Now().Year()