<#
.Synopsis
	Highlights MatchInfo objects similar to the output from grep.
.Description
	Highlights MatchInfo objects similar to the output from grep.
#>
#requires -version 2
param ( 
	[Parameter(Mandatory=$true, ValueFromPipeline=$true)] 
	[Microsoft.PowerShell.Commands.MatchInfo] $match
)

begin {}
process { 
	function Get-RelativePath([string] $path) {
		$path = $path.Replace($pwd.Path, '')
		if ($path.StartsWith('\') -and (-not $path.StartsWith('\\'))) { 
			$path = $path.Substring(1) 
		}
		$path
	}

	function Write-PathAndLine($match) {
		Write-Host (Get-RelativePath $match.Path) -foregroundColor DarkMagenta -nonewline
		Write-Host ':' -foregroundColor Cyan -nonewline
		Write-Host $match.LineNumber -foregroundColor DarkYellow
	}

	function Write-HighlightedMatch($match) {
		$index = 0
		foreach ($m in $match.Matches) {
			Write-Host $match.Line.SubString($index, $m.Index - $index) -nonewline
			Write-Host $m.Value -ForegroundColor Red -nonewline
			$index = $m.Index + $m.Length
		}
		if ($index -lt $match.Line.Length) {
			Write-Host $match.Line.SubString($index) -nonewline
		}
		''
	}
	
	Write-PathAndLine $match

	$match.Context.DisplayPreContext

	Write-HighlightedMatch $match

	$match.Context.DisplayPostContext
	''
}
end {}