private IntPtr GetCustomImportersHeadPtr(CustomImportDelegate[] customImporters)
{
int length = customImporters.Length;
IntPtr cImporters = sass_make_importer_list(customImporters.Length);
for (int i = 0; i < length; ++i)
{
CustomImportDelegate customImporter = customImporters[i];
IntPtr pointer = customImporter.Method.MethodHandle.GetFunctionPointer();
_importersCallbackDictionary.Add(pointer, customImporter);
var entry = sass_make_importer(SassImporterCallback, length - i - 1, pointer);
sass_importer_set_list_entry(cImporters, i, entry);
}
return(cImporters);
}
private IntPtr SassImporterCallback(IntPtr url, IntPtr callback, IntPtr compiler)
{
IntPtr cookiePtr = sass_importer_get_cookie(callback);
CustomImportDelegate customImportCallback = _importersCallbackDictionary[cookiePtr];
IntPtr parentImporterPtr = sass_compiler_get_last_import(compiler);
IntPtr absolutePathPtr = sass_import_get_abs_path(parentImporterPtr);
string parentImport = PtrToString(absolutePathPtr);
string currrentImport = PtrToString(url);
SassImport[] importsArray = customImportCallback(currrentImport, parentImport, _sassOptions);
if (importsArray == null)
{
return(IntPtr.Zero);
}
IntPtr cImportsList = sass_make_import_list(importsArray.Length);
for (int i = 0; i < importsArray.Length; ++i)
{
IntPtr entry;
if (string.IsNullOrEmpty(importsArray[i].Error))
{
entry = sass_make_import_entry(new SassSafeStringHandle(importsArray[i].Path),
EncodeAsUtf8IntPtr(importsArray[i].Data),
EncodeAsUtf8IntPtr(importsArray[i].Map));
}
else
{
entry = sass_make_import_entry(new SassSafeStringHandle(string.Empty), IntPtr.Zero, IntPtr.Zero);
sass_import_set_error(entry, EncodeAsUtf8IntPtr(importsArray[i].Error), -1, -1);
}
sass_import_set_list_entry(cImportsList, i, entry);
}
return(cImportsList);
}
