MatchInfo.format.ps1xml

<Configuration><ViewDefinitions>
    <View><Name>MatchInfo</Name>
        <ViewSelectedBy><TypeName>Microsoft.PowerShell.Commands.MatchInfo</TypeName></ViewSelectedBy>
        <CustomControl><CustomEntries><CustomEntry><CustomItem><ExpressionBinding><ScriptBlock>
            #defaults are equivalent to $MatchInfoPreference =@{$Prefix='> '; $MatchVTSeq=$PSStyle.Reverse; $PathVTSeq=''; $NumberVTSeq=''; $ContextVTSeq=''}
            $ResetVTSeq     = $PSStyle.Reset
            $Prefix         = '> '
            if (-not $MatchInfoPreference) {$MatchVTSeq =   $PSStyle.Reverse }
            else {
                $MatchVTSeq = $MatchInfoPreference.MatchVTSeq
                if ($MatchInfoPreference.Prefix) {$Prefix = $MatchInfoPreference.Prefix}
            }
            #if text was piped in filename and path will both be "inputsteam" otherwise the filename will be part of the path.
            if     ($_.Path -eq $_.filename)             {$displayPath = '' }
            elseif (-not $MatchInfoPreference.PathVTSeq) {$displayPath = $_.RelativePath($Pwd) + ":" }
            else        {$displayPath = $MatchInfoPreference.PathVTSeq + $_.RelativePath($Pwd) + $ResetVTSeq + ":" }
            $contextParams  =  @{'Prefix' = " " * $Prefix.length}
            if ($MatchInfoPreference.ContextVTSeq) {
                $ContextVTSeq = $MatchInfoPreference.ContextVTSeq
                $contextParams['Suffix'] = $ResetVTSeq
            }
            function formatLine {
                param ($Line, $Number, $Prefix, $Suffix)
                if    ($MatchInfoPreference.NumberVTSeq) {$Number = $MatchInfoPreference.NumberVTSeq + $Number + $ResetVTSeq}
            "{0}{1}{2}:{3}{4}" -f $Prefix, $displayPath, $Number, $Line, $Suffix
            }
            #highlight the matches unless MatchVTSeq is null or an empty string.
            if   ([string]::IsNullOrEmpty($MatchVTSeq)) {$l = $_.line}
            else {
                $lineIndex = 0;
                $l         = ""
                foreach ($match in $_.matches) {
                    $l +=   $_.line.Substring($lineIndex,  ($match.index-$lineIndex)) + $MatchVTSeq  +
                            $_.line.Substring($match.index, $match.length) + $ResetVTSeq
                    $lineIndex = $match.index + $match.length
                }
                $l += $_.line.Substring($lineIndex)
            }
            # Just return a single line if the user didn't  enable context-tracking.
            if (-not $_.Context) {formatLine -line $l -Number $_.LineNumber }
            #Otherwise, render the full context.
            else {
                $lines = @()
                $number = $_.LineNumber - $_.Context.DisplayPreContext.Length;
                $_.Context.DisplayPreContext.foreach({
                    $lines += FormatLine -Line ($ContextVTSeq +$_) -Number ($number ++)  @contextParams
                })
                $lines     += FormatLine -Line $l -Number ($number ++) -Prefix $Prefix
                $_.Context.DisplayPostContext.foreach({
                    $lines += FormatLine -Line ($ContextVTSeq + $_) -Number ($number ++) @contextParams
                })
                $lines -join [System.Environment]::NewLine
            }
       </ScriptBlock></ExpressionBinding></CustomItem></CustomEntry></CustomEntries></CustomControl>
    </View>
</ViewDefinitions></Configuration>