Function widestFirstColumnValue

cli/command/image/tree.go:545–565

widestFirstColumnValue calculates the width needed to fully display the image names and platforms.

(headers []imgColumn, images []topImage)

// widestFirstColumnValue calculates the width needed to fully display the image names and platforms.
func widestFirstColumnValue(headers []imgColumn, images []topImage) int {
	width := len(headers[0].Title)
	for _, img := range images {
		names := img.Names
		if len(names) == 0 {
			names = []string{untaggedName}
		}
		for _, name := range names {
			if len(name) > width {
				width = len(name)
			}
		}
		for _, sub := range img.Children {
			pl := len(sub.Platform) + len("└─ ")
			if pl > width {
				width = pl
			}
		}
	}
	return width
}