Introduce options for customizing the normal mode's prompt

main.go

@@ -455,7 +455,13 @@ func initConfig() {
 	viper.AutomaticEnv() // read in environment variables that match
 
 	// If a config file is found, read it in.
-	_ = viper.ReadInConfig()
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+			fmt.Fprintln(os.Stderr, err)
+			return
+		}
+	}
+
 	if err := viper.Unmarshal(&config); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		return

ov.yaml

@@ -8,6 +8,10 @@
 # BeforeWriteOriginal: 1000
 # AfterWriteOriginal: 0
 # MemoryLimit: 10000
+# Prompt:
+#   Normal:
+#     ShowFilename: true
+#     InvertColor: true
 
 General:
   TabWidth: 8

oviewer/config.go

@@ -57,5 +57,11 @@ func NewConfig() Config {
 			TabWidth:       8,
 			MarkStyleWidth: 1,
 		},
+		Prompt: OVPromptConfig{
+			Normal: OVPromptConfigNormal{
+				ShowFilename: true,
+				InvertColor: true,
+			},
+		},
 	}
 }

oviewer/draw.go

@@ -487,20 +487,27 @@ func (root *Root) normalLeftStatus() (contents, int) {
 	} else if root.Doc.FollowSection {
 		modeStatus = "(Follow Section)"
 	}
-	caption := root.Doc.FileName
+
+	caption := ""
 	if root.Doc.Caption != "" {
 		caption = root.Doc.Caption
+	} else if root.Config.Prompt.Normal.ShowFilename {
+		caption = root.Doc.FileName
 	}
 
 	leftStatus := fmt.Sprintf("%s%s%s:%s", number, modeStatus, caption, root.message)
 	leftContents := StrToContents(leftStatus, -1)
-	color := tcell.ColorWhite
-	if root.CurrentDoc != 0 {
-		color = tcell.Color((root.CurrentDoc + 8) % 16)
-	}
-	for i := 0; i < len(leftContents); i++ {
-		leftContents[i].style = leftContents[i].style.Foreground(tcell.ColorValid + color).Reverse(true)
+
+	if root.Config.Prompt.Normal.InvertColor {
+		color := tcell.ColorWhite
+		if root.CurrentDoc != 0 {
+			color = tcell.Color((root.CurrentDoc + 8) % 16)
+		}
+		for i := 0; i < len(leftContents); i++ {
+			leftContents[i].style = leftContents[i].style.Foreground(tcell.ColorValid + color).Reverse(true)
+		}
 	}
+
 	return leftContents, len(leftContents)
 }
 

oviewer/oviewer.go

@@ -157,6 +157,15 @@ type general struct {
 	PlainMode bool
 }
 
+type OVPromptConfigNormal struct {
+	ShowFilename bool
+	InvertColor  bool
+}
+
+type OVPromptConfig struct {
+	Normal OVPromptConfigNormal
+}
+
 // Config represents the settings of ov.
 type Config struct {
 	// KeyBinding
@@ -172,7 +181,10 @@ type Config struct {
 	StyleColumnRainbow []OVStyle
 	// StyleMultiColorHighlight is the style that applies to the multi color highlight.
 	StyleMultiColorHighlight []OVStyle
-	// StyleHeader is the style that applies to the header.
+
+	Prompt                   OVPromptConfig
+
+  // StyleHeader is the style that applies to the header.
 	StyleHeader OVStyle
 	// StyleBody is the style that applies to the body.
 	StyleBody OVStyle