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/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "cobalt/script/mozjs/conversion_helpers.h"
#include "third_party/mozjs/js/src/jsapi.h"
namespace cobalt {
namespace script {
namespace mozjs {
// JSValue -> std::string
void FromJSValue(JSContext* context, JS::HandleValue value,
int conversion_flags, ExceptionState* exception_state,
std::string* out_string) {
DCHECK_EQ(conversion_flags & ~kConversionFlagsString, 0)
<< "Unexpected conversion flags found: ";
if (value.isNull() &&
conversion_flags & kConversionFlagTreatNullAsEmptyString) {
*out_string = "";
return;
}
if (value.isUndefined() &&
conversion_flags & kConversionFlagTreatUndefinedAsEmptyString) {
*out_string = "";
return;
}
JS::RootedString string(context, JS_ValueToString(context, value));
if (!string) {
exception_state->SetSimpleException(kConvertToStringFailed);
return;
}
JSAutoByteString auto_byte_string;
char* utf8_chars = auto_byte_string.encodeUtf8(context, string);
if (!utf8_chars) {
exception_state->SetSimpleException(kConvertToUTF8Failed);
return;
}
*out_string = utf8_chars;
}
// OpaqueHandle -> JSValue
void ToJSValue(JSContext* context,
const OpaqueHandleHolder* opaque_handle_holder,
JS::MutableHandleValue out_value) {
JS::RootedObject js_object(context);
if (opaque_handle_holder) {
// Downcast to MozjsObjectHandleHolder so we can get the JS object.
const MozjsObjectHandleHolder* mozjs_object_handle_holder =
base::polymorphic_downcast<const MozjsObjectHandleHolder*>(
opaque_handle_holder);
js_object = mozjs_object_handle_holder->js_object();
}
// OBJECT_TO_JSVAL handles the case where this is NULL.
out_value.set(OBJECT_TO_JSVAL(js_object));
}
// JSValue -> OpaqueHandle
void FromJSValue(JSContext* context, JS::HandleValue value,
int conversion_flags, ExceptionState* exception_state,
MozjsObjectHandleHolder* out_holder) {
DCHECK_EQ(conversion_flags & ~kConversionFlagsObject, 0)
<< "Unexpected conversion flags found.";
JS::RootedObject js_object(context);
// https://www.w3.org/TR/WebIDL/#es-object
// 1. If Type(V) is not Object, throw a TypeError
// We'll handle the null case below.
if (!value.isObjectOrNull()) {
exception_state->SetSimpleException(kNotObjectType);
return;
}
js_object = JSVAL_TO_OBJECT(value);
if (!js_object) {
// Set an exception if this is not nullable.
if (!(conversion_flags & kConversionFlagNullable)) {
exception_state->SetSimpleException(kNotNullableType);
}
// Return here even for the non-exception case.
return;
}
DCHECK(js_object);
MozjsGlobalEnvironment* global_environment =
static_cast<MozjsGlobalEnvironment*>(JS_GetContextPrivate(context));
*out_holder = MozjsObjectHandleHolder(js_object, context,
global_environment->wrapper_factory());
}
} // namespace mozjs
} // namespace script
} // namespace cobalt