refactor the way we render lists

pkg/gui/presentation/files.go

@@ -0,0 +1,36 @@
+package presentation
+
+import (
+	"github.com/fatih/color"
+	"github.com/jesseduffield/lazygit/pkg/commands"
+)
+
+func GetFileListDisplayStrings(files []*commands.File) [][]string {
+	lines := make([][]string, len(files))
+
+	for i := range files {
+		lines[i] = getFileDisplayStrings(files[i])
+	}
+
+	return lines
+}
+
+// getFileDisplayStrings returns the display string of branch
+func getFileDisplayStrings(f *commands.File) []string {
+	// potentially inefficient to be instantiating these color
+	// objects with each render
+	red := color.New(color.FgRed)
+	green := color.New(color.FgGreen)
+	if !f.Tracked && !f.HasStagedChanges {
+		return []string{red.Sprint(f.DisplayString)}
+	}
+
+	output := green.Sprint(f.DisplayString[0:1])
+	output += red.Sprint(f.DisplayString[1:3])
+	if f.HasUnstagedChanges {
+		output += red.Sprint(f.Name)
+	} else {
+		output += green.Sprint(f.Name)
+	}
+	return []string{output}
+}