Added light theme option to the settings

pkg/theme/theme.go

@@ -0,0 +1,68 @@
+package theme
+
+import (
+	"github.com/fatih/color"
+	"github.com/jesseduffield/gocui"
+	"github.com/spf13/viper"
+)
+
+var (
+	// DefaultTextColor is the default text color
+	DefaultTextColor = color.FgWhite
+
+	// GocuiDefaultTextColor does the same as DefaultTextColor but this one only colors gocui default text colors
+	GocuiDefaultTextColor gocui.Attribute
+
+	// ActiveBorderColor is the border color of the active frame
+	ActiveBorderColor gocui.Attribute
+
+	// InactiveBorderColor is the border color of the inactive active frames
+	InactiveBorderColor gocui.Attribute
+)
+
+// UpdateTheme updates all theme variables
+func UpdateTheme(userConfig *viper.Viper) {
+	ActiveBorderColor = getColor(userConfig.GetStringSlice("gui.theme.activeBorderColor"))
+	InactiveBorderColor = getColor(userConfig.GetStringSlice("gui.theme.inactiveBorderColor"))
+
+	isLightTheme := userConfig.GetBool("gui.theme.lightTheme")
+	if isLightTheme {
+		DefaultTextColor = color.FgBlack
+		GocuiDefaultTextColor = gocui.ColorBlack
+	} else {
+		DefaultTextColor = color.FgWhite
+		GocuiDefaultTextColor = gocui.ColorWhite
+	}
+}
+
+// getAttribute gets the gocui color attribute from the string
+func getAttribute(key string) gocui.Attribute {
+	colorMap := map[string]gocui.Attribute{
+		"default":   gocui.ColorDefault,
+		"black":     gocui.ColorBlack,
+		"red":       gocui.ColorRed,
+		"green":     gocui.ColorGreen,
+		"yellow":    gocui.ColorYellow,
+		"blue":      gocui.ColorBlue,
+		"magenta":   gocui.ColorMagenta,
+		"cyan":      gocui.ColorCyan,
+		"white":     gocui.ColorWhite,
+		"bold":      gocui.AttrBold,
+		"reverse":   gocui.AttrReverse,
+		"underline": gocui.AttrUnderline,
+	}
+	value, present := colorMap[key]
+	if present {
+		return value
+	}
+	return gocui.ColorWhite
+}
+
+// getColor bitwise OR's a list of attributes obtained via the given keys
+func getColor(keys []string) gocui.Attribute {
+	var attribute gocui.Attribute
+	for _, key := range keys {
+		attribute |= getAttribute(key)
+	}
+	return attribute
+}