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# Original Author: Lee Holmes, http://www.leeholmes.com/blog/MorePowerShellSyntaxHighlighting.aspx
# Modified by: Helge Klein, http://blogs.sepago.de/helge/
# (http://blogs.sepago.de/e/helge/2010/01/18/syntax-highlighting-powershell-code-in-html-with-a-powershell-script)
# Modified again by: David Wise, http://blog.davidjwise.com
# Syntax highlights a PowerShell script.
#
# Usage: Supply the script to syntax hightligh as first and only parameter
#
# Output: Copy of original script with extension ".html"
#
# Example: .\Highlight-Syntax.ps1 .\Get-AppVPackageDependencies.ps1
#
# Version history:
#
# 1.2: David Wise
# - Converted to use CSS Classes instead of fixed color values
#
# 1.1:
# - Loading the required assembly System.Web now. This was missing earlier.
#
# 1.0: Initial version
[CmdletBinding()]
param($path)
# Load required assemblies
[void] [System.Reflection.Assembly]::Load("System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
# define the CSS Classes for the various elements. the prefix of 'pshs' is to hopefully make the class names unique in almost any
# environment. It is short for "PowerShell Highlight Syntax"
$styles = "
<style type=""text/css"">
.pshs-Body {
font-size: 12px;
font-family: ""Courier New"",Courier,monospace;
line-height:12px;
}
.pshs-Attribute { color: #ADD8E6; }
.pshs-Command { color: #0000FF; font-weight:bold; }
.pshs-CommandArgument { color: #8A2BE2; }
.pshs-CommandParameter { color: #000080; }
.pshs-Comment { color: #006400; font-style:italic; }
.pshs-GroupEnd { color: #000000; }
.pshs-GroupStart { color: #000000; }
.pshs-Keyword { color: #00008B; }
.pshs-LineContinuation { color: #000000; }
.pshs-LoopLabel { color: #00008B; }
.pshs-Member { color: #000000; }
.pshs-NewLine { color: #000000; }
.pshs-Number { color: #800080; }
.pshs-Operator { color: #A9A9A9; }
.pshs-Position { color: #000000; }
.pshs-StatementSeparator { color: #000000; }
.pshs-String { color: #8B0000; background-color:ECECEC; }
.pshs-Type { color: #008080; }
.pshs-Unknown { color: #000000; }
.pshs-Variable { color: #FF4500; }
</style>
"
# Generate an HTML span and append it to HTML string builder
$currentLine = 1
function Append-HtmlSpan ($block, $tokenColor)
{
if (($tokenColor -eq 'NewLine') -or ($tokenColor -eq 'LineContinuation'))
{
if($tokenColor -eq 'LineContinuation')
{
$null = $codeBuilder.Append('`')
}
$null = $codeBuilder.Append("<br />`r`n")
}
else
{
$block = [System.Web.HttpUtility]::HtmlEncode($block)
if (-not $block.Trim())
{
$block = $block.Replace(' ', '&nbsp;')
}
if($tokenColor -eq 'String')
{
$lines = $block -split "`r`n"
$block = ""
$multipleLines = $false
foreach($line in $lines)
{
if($multipleLines)
{
$block += "<BR />`r`n"
}
$newText = $line.TrimStart()
$newText = "&nbsp;" * ($line.Length - $newText.Length) + $newText
$block += $newText
$multipleLines = $true
}
}
$null = $codeBuilder.Append("<span class=""pshs-$tokenColor"">$block</span>")
}
}
function Main
{
$text = $null
if($path)
{
$text = (Get-Content $path) -join "`r`n"
}
else
{
Write-Error 'Please supply the path to the PowerShell script to syntax highlight as first (and only) parameter.'
return
}
trap { break }
# Do syntax parsing.
$errors = $null
$tokens = [system.management.automation.psparser]::Tokenize($Text, [ref] $errors)
# Initialize HTML builder.
$codeBuilder = new-object system.text.stringbuilder
$null = $codeBuilder.Append($styles)
$null = $codeBuilder.Append("<span class=""pshs-Body"">")
# Iterate over the tokens and set the colors appropriately.
$position = 0
foreach ($token in $tokens)
{
if ($position -lt $token.Start)
{
$block = $text.Substring($position, ($token.Start - $position))
$tokenColor = 'Unknown'
Append-HtmlSpan $block $tokenColor
}
$block = $text.Substring($token.Start, $token.Length)
$tokenColor = $token.Type.ToString()
Append-HtmlSpan $block $tokenColor
$position = $token.Start + $token.Length
}
$null = $codeBuilder.Append("</span>");
# Build the entire syntax-highlighted script
$code = $codeBuilder.ToString()
# Replace tabs with three blanks
$code = $code -replace "\t","&nbsp;&nbsp;&nbsp;"
# Write the HTML to a file
$code | set-content -path "$path.html"
}
. Main
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