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Command-line progress bars and spinners.

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progress_bar lib progress_bar full_bar_width.ex
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lib/progress_bar/full_bar_width.ex 

# "Full bar" as in "both 'bar' and 'blank'".

defmodule ProgressBar.FullBarWidth do

  alias ProgressBar.Utils



  @min_bar_width 1

  @max_bar_width 100



  def determine(terminal_width_config, other_text) do

    available_width = terminal_width(terminal_width_config)

    other_width = other_text |> Utils.strip_invisibles |> String.length

    remaining_width = available_width - other_width



    clamp(remaining_width, @min_bar_width, @max_bar_width)

  end



  defp terminal_width(config) do

    case config do

      :auto -> ProgressBar.TerminalWidth.determine

      fixed_value -> fixed_value

    end

  end



  defp clamp(number, min_value, max_value) do

    number |> min(max_value) |> max(min_value)

  end

end