Unable to add right margin to an empty string

[mikelorant]

Describe the bug
When attempting to add a margin to an empty string, the width is reported as 0.

Setup

• macOS 12.7.2
• zsh 5.9
• iTerm 3.4.23

To Reproduce
I have created a repository with documentation, test application and unit tests to demonstrate this issue:

Clone the repository at: https://github.com/mikelorant/lipgloss-width

go run main.go

To run the tests:

go test ./... -v

Source Code
The most basic way to verify this problem is with this code:

str := ""

style := lipgloss.NewStyle().
  Bold(false).
  MarginRight(1)

render := style.Render(str)

log.Println(lipgloss.Width(render))

This will output 0.

Changing bold to true changes the output to 1.

Be aware that the terminal capabilities detected by muesli/termenv will change the outcome if the terminal cannot provide ANSI capabilities. This can be forced with export NO_COLOR=1 when enabling bold to see how the outcome changes.

Expected behavior
The expected result is 1.

[mikelorant]

@meowgorithm The code for padRight was initially added by you. Are you okay with the fix as part of #253?

I'd also like to refactor padLeft and padRight to share a pad function as there is only a 2 line difference between each function.

[mikelorant]

I have refactored the padding functions padLeft and padRight to use a common function called pad in #254.

[mikelorant]

This issue has been resolved.