/// <summary>
/// Shared conversion method.
/// </summary>
/// <param name="fromStringOrFile">From string or file.</param>
/// <param name="fromFile">if set to <c>true</c> <paramref name="fromStringOrFile"/> is a scss file; otherwise it is a scss content.</param>
/// <param name="options">The options.</param>
/// <returns>The result of the conversion</returns>
private static ScssResult FromCore(string fromStringOrFile, bool fromFile, ScssOptions options = null)
{
var compiler = new LibSass.Sass_Compiler();
GCHandle?tryImportHandle = null;
var context = new LibSass.Sass_Context();
try
{
options = options ?? DefaultOptions;
if (fromFile)
{
var fileContext = LibSass.sass_make_file_context(fromStringOrFile);
context = fileContext;
if (options.InputFile == null)
{
options.InputFile = fromStringOrFile;
}
tryImportHandle = MarshalOptions(fileContext, options);
compiler = LibSass.sass_make_file_compiler(fileContext);
}
else
{
var dataContext = LibSass.sass_make_data_context(fromStringOrFile);
context = dataContext;
tryImportHandle = MarshalOptions(dataContext, options);
compiler = LibSass.sass_make_data_compiler(dataContext);
}
LibSass.sass_compiler_parse(compiler);
CheckStatus(context);
LibSass.sass_compiler_execute(compiler);
CheckStatus(context);
// Gets the result of the conversion
var css = LibSass.sass_context_get_output_string(context);
// Gets the map if it was enabled
string map = null;
if (options != null && options.GenerateSourceMap)
{
map = LibSass.sass_context_get_source_map_string(context);
}
// Gets the list of included files
var includedFiles = GetIncludedFiles(context);
// Returns the result
return(new ScssResult(css, map, includedFiles));
}
finally
{
// Release the cookie handle if any
if (tryImportHandle.HasValue && tryImportHandle.Value.IsAllocated)
{
tryImportHandle.Value.Free();
}
if (compiler.Pointer != IntPtr.Zero)
{
LibSass.sass_delete_compiler(compiler);
}
if (context.Pointer != IntPtr.Zero)
{
if (fromFile)
{
LibSass.sass_delete_file_context((LibSass.Sass_File_Context)context);
}
else
{
LibSass.sass_delete_data_context((LibSass.Sass_Data_Context)context);
}
}
}
}
private static unsafe LibSass.Sass_Import_List CustomScssImporter(LibSass.StringUtf8 currentPath, LibSass.Sass_Importer_Entry cb, LibSass.Sass_Compiler compiler)
{
var cookie = LibSass.sass_importer_get_cookie(cb);
var previous = LibSass.sass_compiler_get_last_import(compiler);
string previousPath = LibSass.sass_import_get_abs_path(previous);
var cookieHandle = GCHandle.FromIntPtr(new IntPtr(cookie));
var tryImport = (ScssOptions.TryImportDelegate)cookieHandle.Target;
var file = (string)currentPath;
var importList = LibSass.sass_make_import_list(1);
uint line = 0;
uint column = 0;
string errorMessage = null;
if (tryImport != null)
{
try
{
string scss;
string map;
if (tryImport(file, previousPath, out scss, out map))
{
var entry = LibSass.sass_make_import_entry(file, scss, map);
*(LibSass.Sass_Import_Entry *)importList.Pointer = entry;
return(importList);
}
}
catch (ScssException ex)
{
errorMessage = ex.Message;
line = (uint)ex.Line;
column = (uint)ex.Column;
}
catch (Exception ex)
{
errorMessage = ex.ToString();
}
}
if (errorMessage == null)
{
errorMessage = $"Unable to find include file for @import \"{file}\" with dynamic import";
}
{
var entry = LibSass.sass_make_import_entry(file, null, null);
*(LibSass.Sass_Import_Entry *)importList.Pointer = entry;
LibSass.sass_import_set_error(entry, errorMessage, line, column);
}
return(importList);
}
