functions/Read-EBCssStyleSheet.ps1
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function Read-EBCssStyleSheet { <# .SYNOPSIS Parse a stylesheet and convert it into an object model. .DESCRIPTION Parse a stylesheet and convert it into an object model. .PARAMETER CssData CSS data provided as a string. .PARAMETER Path Path to CSS stylesheets to parse. .PARAMETER Merge For all styles bound to a class, merge in the settings of the base styles for the tag the class applies to. .EXAMPLE PS C:\> Read-EBCssStyleSheet -CssData $content Parses the CSS styles contained as string in $content .EXAMPLE PS C:\> Get-ChildItem *.css | Read-EBCssStyleSheet Parses all CSS stylesheets in the current folder. #> [OutputType([EbookBuilder.StyleObject])] [CmdletBinding(DefaultParameterSetName = 'Text')] param ( [Parameter(Mandatory = $true, Position = 0, ParameterSetName = 'Text')] [string] $CssData, [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = 'File')] [Alias('FullName')] [string[]] $Path, [switch] $Merge ) begin{ #region Functions function Convert-StyleSheet { [CmdletBinding()] param ( [Parameter(ValueFromPipeline = $true)] [string[]] $Text, [hashtable] $ResultHash ) begin { $currentTag = '' $currentClass = '_default' $inComment = $false } process { foreach ($line in $Text | Get-SubString -Trim " " | Split-String "`n" | Get-SubString -Trim " " | Remove-PSFNull) { Write-PSFMessage -Level InternalComment -Message ' {0}' -StringValues $line #region Comments if ($line -match "^/\*") { $inComment = $true } if ($line -match "\*/") { $inComment = $false } if ($inComment -or $line -match "^/\*" -or $line -match "\*/") { continue } #endregion Comments #region Close CSS if ($line -eq "}") { $currentTag = '' $currentClass = '_default' continue } #endregion Close CSS #region Open CSS if ($line -like "*{") { $tempLine = $line | Get-SubString -TrimEnd " {" $segments = $tempLine -split "\.",2 $currentTag = $segments[0] if ($segments[1]) { $currentClass = $segments[1] } else { $currentClass = '_default' } continue } #endregion Open CSS #region Content if (-not $ResultHash[$currentTag]) { $ResultHash[$currentTag] = @{ } } if (-not $ResultHash[$currentTag][$currentClass]) { $ResultHash[$currentTag][$currentClass] = @{ } } $key, $value = $line -split ":", 2 Write-PSFMessage -Level InternalComment -Message ' {0} : {1}' -StringValues $key, $value $ResultHash[$currentTag][$currentClass][$key.Trim()] = $value.Trim(" ;") #endregion Content } } } function Resolve-StyleHash { [OutputType([EbookBuilder.StyleObject])] [CmdletBinding()] param ( [hashtable] $ResultHash, [bool] $Merge ) foreach ($pair in $ResultHash.GetEnumerator()) { $tagName = $pair.Key $defaultStyle = @{ } if ($Merge -and $pair.Value._Default) { $defaultStyle = $pair.Value._Default } foreach ($entry in $pair.Value.GetEnumerator()) { $style = [EbookBuilder.StyleObject]::new() $style.Tag = $tagName if ($entry.Key -ne '_default') { $style.Class = $entry.Key } $hash = $defaultStyle.Clone() foreach ($attribute in $entry.Value.GetEnumerator()) { $hash[$attribute.Key] = $attribute.Value } foreach ($attribute in $hash.GetEnumerator()) { $style.Attributes[$attribute.Key] = $attribute.Value } $style } } } #endregion Functions $resultHash = @{ } } process { if ($CssData) { $CssData | Convert-StyleSheet -ResultHash $resultHash } foreach ($filePath in $Path) { Write-PSFMessage -Message 'Loading style file: {0}' -StringValues $filePath Get-Content -Path $filePath | Convert-StyleSheet -ResultHash $resultHash } } end { Resolve-StyleHash -ResultHash $resultHash -Merge $Merge } } |