/// <summary>
/// Transforms the content of the given string.
/// </summary>
/// <param name="input">The input string to transform.</param>
/// <param name="path">The path to the given input string to transform.</param>
/// <param name="cruncher">The cruncher that is running the transform.</param>
/// <returns>The transformed string.</returns>
public string Transform(string input, string path, CruncherBase cruncher)
{
try
{
var options = new LibSass.Compiler.Options.SassOptions
{
InputPath = path,
OutputStyle = LibSass.Compiler.Options.SassOutputStyle.Expanded,
Precision = 5,
IsIndentedSyntax = System.IO.Path.GetExtension(path).Equals(".sass", StringComparison.OrdinalIgnoreCase)
};
var compiler = new LibSass.Compiler.SassCompiler(options);
var result = compiler.Compile();
foreach (var file in result.IncludedFiles)
{
cruncher.AddFileMonitor(file, "not empty");
}
return(result.Output);
}
catch (Exception ex)
{
throw new SassAndScssCompilingException(ex.Message, ex.InnerException);
}
}
/// <summary>
/// Transforms the content of the given string from Less into CSS.
/// </summary>
/// <param name="input">The input string to transform.</param>
/// <param name="path">The path to the given input string to transform.</param>
/// <param name="cruncher">The cruncher that is running the transform.</param>
/// <returns>The transformed string.</returns>
public string Transform(string input, string path, CruncherBase cruncher)
{
// The standard engine returns a FileNotFoundExecption so I've rolled my own path resolver.
Parser parser = new Parser();
DotLessPathResolver dotLessPathResolver = new DotLessPathResolver(path);
FileReader fileReader = new FileReader(dotLessPathResolver);
parser.Importer = new Importer(fileReader);
ILessEngine lessEngine = new LessEngine(parser);
try
{
string result = lessEngine.TransformToCss(input, path);
if (cruncher.Options.CacheFiles)
{
// Add each import as a file dependency so that the cache will clean itself.
IEnumerable <string> imports = lessEngine.GetImports();
IList <string> enumerable = imports as IList <string> ?? imports.ToList();
if (enumerable.Any())
{
foreach (string import in enumerable)
{
if (!import.Contains("://"))
{
string filePath =
HostingEnvironment.MapPath(
VirtualPathUtility.Combine(dotLessPathResolver.CurrentFileDirectory, import));
cruncher.AddFileMonitor(filePath, "not empty");
}
}
}
}
return(result);
}
catch (Exception ex)
{
throw new LessCompilingException(ex.Message, ex.InnerException);
}
}
/// <summary>
/// Parses the string for CSS imports and replaces them with the referenced CSS.
/// </summary>
/// <param name="sass">
/// The SASS to parse for import statements.
/// </param>
/// <param name="cruncher">The cruncher that is running the transform.</param>
private void AddImportsToFileMonitors(string sass, CruncherBase cruncher)
{
// Check for imports and parse if necessary.
if (!sass.Contains("@import", StringComparison.OrdinalIgnoreCase))
{
return;
}
// Recursively parse the sass for imports.
foreach (Match match in ImportsRegex.Matches(sass))
{
// Recursively parse the sass for imports.
GroupCollection groups = match.Groups;
CaptureCollection fileCaptures = groups["filename"].Captures;
if (fileCaptures.Count > 0)
{
string fileName = fileCaptures[0].ToString();
if (!fileName.Contains("://"))
{
// Check and add the @import the match.
FileInfo fileInfo =
new FileInfo(Path.GetFullPath(Path.Combine(cruncher.Options.RootFolder, fileName)));
// Read the file.
if (fileInfo.Exists)
{
string file = fileInfo.FullName;
using (StreamReader reader = new StreamReader(file))
{
// Recursively check the children.
this.AddImportsToFileMonitors(reader.ReadToEnd(), cruncher);
}
// Cache if applicable.
cruncher.AddFileMonitor(file, "not empty");
}
}
}
}
}
/// <summary>
/// Transforms the content of the given string from Less into CSS.
/// </summary>
/// <param name="input">The input string to transform.</param>
/// <param name="path">The path to the given input string to transform.</param>
/// <param name="cruncher">The cruncher that is running the transform.</param>
/// <returns>The transformed string.</returns>
public string Transform(string input, string path, CruncherBase cruncher)
{
// The standard engine returns a FileNotFoundExecption so I've rolled my own path resolver.
Parser parser = new Parser();
DotLessPathResolver dotLessPathResolver = new DotLessPathResolver(path);
FileReader fileReader = new FileReader(dotLessPathResolver);
parser.Importer = new Importer(fileReader);
ILessEngine lessEngine = new LessEngine(parser);
try
{
string result = lessEngine.TransformToCss(input, path);
if (cruncher.Options.CacheFiles)
{
// Add each import as a file dependency so that the cache will clean itself.
IEnumerable<string> imports = lessEngine.GetImports();
IList<string> enumerable = imports as IList<string> ?? imports.ToList();
if (enumerable.Any())
{
foreach (string import in enumerable)
{
if (!import.Contains(Uri.SchemeDelimiter))
{
string filePath =
HostingEnvironment.MapPath(VirtualPathUtility.Combine(dotLessPathResolver.CurrentFileDirectory, import));
cruncher.AddFileMonitor(filePath, "not empty");
}
}
}
}
return result;
}
catch (Exception ex)
{
throw new LessCompilingException(ex.Message, ex.InnerException);
}
}
/// <summary>
/// Parses the string for CSS imports and replaces them with the referenced CSS.
/// </summary>
/// <param name="sass">
/// The SASS to parse for import statements.
/// </param>
/// <param name="cruncher">The cruncher that is running the transform.</param>
private void AddImportsToFileMonitors(string sass, CruncherBase cruncher)
{
// Check for imports and parse if necessary.
if (!sass.Contains("@import", StringComparison.OrdinalIgnoreCase))
{
return;
}
// Recursively parse the sass for imports.
foreach (Match match in ImportsRegex.Matches(sass))
{
// Recursively parse the sass for imports.
GroupCollection groups = match.Groups;
CaptureCollection fileCaptures = groups["filename"].Captures;
if (fileCaptures.Count > 0)
{
string fileName = fileCaptures[0].ToString();
if (!fileName.Contains("://"))
{
// Check and add the @import the match.
FileInfo fileInfo =
new FileInfo(Path.GetFullPath(Path.Combine(cruncher.Options.RootFolder, fileName)));
// Read the file.
if (fileInfo.Exists)
{
string file = fileInfo.FullName;
using (StreamReader reader = new StreamReader(file))
{
// Recursively check the children.
this.AddImportsToFileMonitors(reader.ReadToEnd(), cruncher);
}
// Cache if applicable.
cruncher.AddFileMonitor(file, "not empty");
}
}
}
}
}