private/TextFormatting.ps1
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### ### Text formatting utility functions ### function Get-FormattedText { <# .SYNOPSIS Apply VT-100 modifiers to a string in order to apply a formatting. .PARAMETER Value The string to format. .PARAMETER PreModifier The modifier to add before the value. .PARAMETER PostModifier The modifier to apply after the value. .PARAMETER Esc The escape sequence. #> param ( [string] $Value, [Parameter(Mandatory)] [string] $PreModifier, [Parameter(Mandatory)] [string] $PostModifier, [string] $Esc = $script:ESC ) if ($Value) { "$($Esc)$($PreModifier)$Value$($Esc)$($PostModifier)" } } function Get-FormattedStringLength { <# .SYNOPSIS Return the length of a string excluding VT-100 text formatting modifiers. .PARAMETER FormattedString The formatted string for which to return the length. .OUTPUTS The string length. #> param ( [string] $FormattedString ) # Handle null input if (-Not $FormattedString) { return 0 } # Get the length of all text formatting modifiers $modifiersLength = [Regex]::Matches($FormattedString, "$($script:ESC)\[[0-9]+m") | ForEach-Object { $_.Groups[0].Length } | Measure-Object -Sum # Return the total length minus the modifiers $FormattedString.Length - $modifiersLength.Sum } |