/// <summary>
/// Actualizes a vendor prefixes in CSS assets by using Andrey Sitnik's Autoprefixer
/// </summary>
/// <param name="assets">Set of CSS assets</param>
/// <returns>Set of processed CSS assets</returns>
public override IList <IAsset> PostProcess(IList <IAsset> assets)
{
if (assets == null)
{
throw new ArgumentNullException(
nameof(assets),
string.Format(CoreStrings.Common_ArgumentIsNull, nameof(assets))
);
}
if (assets.Count == 0)
{
return(assets);
}
var assetsToProcessing = assets.Where(a => a.IsStylesheet).ToList();
if (assetsToProcessing.Count == 0)
{
return(assets);
}
ProcessingOptions options = CreateProcessingOptions();
using (var cssAutoprefixer = new CssAutoprefixer(_createJsEngineInstance, options))
{
foreach (var asset in assetsToProcessing)
{
InnerPostProcess(asset, cssAutoprefixer);
}
}
return(assets);
}
/// <summary>
/// Actualizes a vendor prefixes in CSS asset by using Andrey Sitnik's Autoprefixer
/// </summary>
/// <param name="asset">CSS asset</param>
/// <returns>Processed CSS asset</returns>
public override IAsset PostProcess(IAsset asset)
{
if (asset == null)
{
throw new ArgumentNullException(
nameof(asset),
string.Format(CoreStrings.Common_ArgumentIsNull, nameof(asset))
);
}
ProcessingOptions options = CreateProcessingOptions();
using (var cssAutoprefixer = new CssAutoprefixer(_createJsEngineInstance, options))
{
InnerPostProcess(asset, cssAutoprefixer);
}
return(asset);
}
private void InnerPostProcess(IAsset asset, CssAutoprefixer cssAutoprefixer)
{
string content = asset.Content;
string newContent;
string assetUrl = asset.Url;
IList <string> dependencies;
try
{
newContent = !string.IsNullOrWhiteSpace(content) ?
cssAutoprefixer.Process(content, assetUrl).ProcessedContent
:
content ?? string.Empty
;
dependencies = GetIncludedFilePaths(Stats);
}
catch (AutoprefixerProcessingException e)
{
string errorDetails = AutoprefixerErrorHelpers.GenerateErrorDetails(e, true);
var stringBuilderPool = StringBuilderPool.Shared;
StringBuilder errorMessageBuilder = stringBuilderPool.Rent();
errorMessageBuilder.AppendLine(e.Message);
errorMessageBuilder.AppendLine();
errorMessageBuilder.Append(errorDetails);
string errorMessage = errorMessageBuilder.ToString();
stringBuilderPool.Return(errorMessageBuilder);
throw new AssetPostProcessingException(
string.Format(CoreStrings.PostProcessors_PostprocessingSyntaxError,
CODE_TYPE, assetUrl, POSTPROCESSOR_NAME, errorMessage));
}
catch (Exception e)
{
throw new AssetPostProcessingException(
string.Format(CoreStrings.PostProcessors_PostprocessingFailed,
CODE_TYPE, assetUrl, POSTPROCESSOR_NAME, e.Message), e);
}
asset.Content = newContent;
asset.VirtualPathDependencies = asset.VirtualPathDependencies.Union(dependencies).ToList();
}
