Viewing file:  custom_importer_bridge.cpp (3.48 KB) -rw-r--r--
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#include <nan.h>
#include <stdexcept>
#include "custom_importer_bridge.h"
#include "create_string.h"
SassImportList CustomImporterBridge::post_process_return_value(v8::Local<v8::Value> returned_value) const {
SassImportList imports = 0;
Nan::HandleScope scope;
if (returned_value->IsArray()) {
v8::Local<v8::Array> array = returned_value.As<v8::Array>();
imports = sass_make_import_list(array->Length());
for (size_t i = 0; i < array->Length(); ++i) {
v8::Local<v8::Value> value;
Nan::MaybeLocal<v8::Value> unchecked = Nan::Get(array, static_cast<uint32_t>(i));
if (!unchecked.ToLocal(&value) || !value->IsObject()) {
imports[i] = sass_make_import_entry(0, 0, 0);
sass_import_set_error(imports[i], "returned array must only contain object literals", -1, -1);
continue;
}
v8::Local<v8::Object> object = value.As<v8::Object>();
if (value->IsNativeError()) {
char* message = create_string(Nan::Get(object, Nan::New<v8::String>("message").ToLocalChecked()));
imports[i] = sass_make_import_entry(0, 0, 0);
sass_import_set_error(imports[i], message, -1, -1);
free(message);
}
else {
imports[i] = get_importer_entry(object);
}
}
}
else if (returned_value->IsNativeError()) {
imports = sass_make_import_list(1);
v8::Local<v8::Object> object = returned_value.As<v8::Object>();
char* message = create_string(Nan::Get(object, Nan::New<v8::String>("message").ToLocalChecked()));
imports[0] = sass_make_import_entry(0, 0, 0);
sass_import_set_error(imports[0], message, -1, -1);
free(message);
}
else if (returned_value->IsObject()) {
imports = sass_make_import_list(1);
imports[0] = get_importer_entry(returned_value.As<v8::Object>());
}
return imports;
}
Sass_Import* CustomImporterBridge::check_returned_string(Nan::MaybeLocal<v8::Value> value, const char *msg) const
{
v8::Local<v8::Value> checked;
if (value.ToLocal(&checked)) {
if (!checked->IsUndefined() && !checked->IsString()) {
goto err;
} else {
return nullptr;
}
}
err:
auto entry = sass_make_import_entry(0, 0, 0);
sass_import_set_error(entry, msg, -1, -1);
return entry;
}
Sass_Import* CustomImporterBridge::get_importer_entry(const v8::Local<v8::Object>& object) const {
Nan::MaybeLocal<v8::Value> returned_file = Nan::Get(object, Nan::New<v8::String>("file").ToLocalChecked());
Nan::MaybeLocal<v8::Value> returned_contents = Nan::Get(object, Nan::New<v8::String>("contents").ToLocalChecked());
Nan::MaybeLocal<v8::Value> returned_map = Nan::Get(object, Nan::New<v8::String>("map").ToLocalChecked());
Sass_Import *err;
if ((err = check_returned_string(returned_file, "returned value of `file` must be a string")))
return err;
if ((err = check_returned_string(returned_contents, "returned value of `contents` must be a string")))
return err;
if ((err = check_returned_string(returned_map, "returned value of `returned_map` must be a string")))
return err;
char* path = create_string(returned_file);
char* contents = create_string(returned_contents);
char* srcmap = create_string(returned_map);
return sass_make_import_entry(path, contents, srcmap);
}
std::vector<v8::Local<v8::Value>> CustomImporterBridge::pre_process_args(std::vector<void*> in) const {
std::vector<v8::Local<v8::Value>> out;
for (void* ptr : in) {
out.push_back(Nan::New<v8::String>((char const*)ptr).ToLocalChecked());
}
return out;
}
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