149 lines
4.4 KiB
C++
149 lines
4.4 KiB
C++
// Copyright 2004-present Facebook. All Rights Reserved.
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#include "Value.h"
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#include "JSCHelpers.h"
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namespace facebook {
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namespace react {
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Value::Value(JSContextRef context, JSValueRef value) :
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m_context(context),
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m_value(value)
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{
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}
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Value::Value(JSContextRef context, JSStringRef str) :
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m_context(context),
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m_value(JSValueMakeString(context, str))
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{
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}
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Value::Value(Value&& other) :
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m_context(other.m_context),
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m_value(other.m_value)
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{
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other.m_value = nullptr;
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}
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JSContextRef Value::context() const {
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return m_context;
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}
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std::string Value::toJSONString(unsigned indent) const {
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JSValueRef exn;
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auto stringToAdopt = JSValueCreateJSONString(m_context, m_value, indent, &exn);
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if (stringToAdopt == nullptr) {
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std::string exceptionText = Value(m_context, exn).toString().str();
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throwJSExecutionException("Exception creating JSON string: %s", exceptionText.c_str());
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}
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return String::adopt(stringToAdopt).str();
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}
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/* static */
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Value Value::fromJSON(JSContextRef ctx, const String& json) {
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auto result = JSValueMakeFromJSONString(ctx, json);
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if (!result) {
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throwJSExecutionException("Failed to create String from JSON");
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}
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return Value(ctx, result);
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}
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Object Value::asObject() {
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JSValueRef exn;
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JSObjectRef jsObj = JSValueToObject(context(), m_value, &exn);
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if (!jsObj) {
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std::string exceptionText = Value(m_context, exn).toString().str();
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throwJSExecutionException("Failed to convert to object: %s", exceptionText.c_str());
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}
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Object ret = Object(context(), jsObj);
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m_value = nullptr;
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return ret;
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}
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Object::operator Value() const {
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return Value(m_context, m_obj);
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}
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Value Object::callAsFunction(int nArgs, JSValueRef args[]) {
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JSValueRef exn;
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JSValueRef result = JSObjectCallAsFunction(m_context, m_obj, NULL, nArgs, args, &exn);
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if (!result) {
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std::string exceptionText = Value(m_context, exn).toString().str();
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throwJSExecutionException("Exception calling JS function: %s", exceptionText.c_str());
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}
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return Value(m_context, result);
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}
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Value Object::getProperty(const String& propName) const {
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JSValueRef exn;
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JSValueRef property = JSObjectGetProperty(m_context, m_obj, propName, &exn);
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if (!property) {
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std::string exceptionText = Value(m_context, exn).toString().str();
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throwJSExecutionException("Failed to get property: %s", exceptionText.c_str());
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}
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return Value(m_context, property);
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}
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Value Object::getPropertyAtIndex(unsigned index) const {
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JSValueRef exn;
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JSValueRef property = JSObjectGetPropertyAtIndex(m_context, m_obj, index, &exn);
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if (!property) {
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std::string exceptionText = Value(m_context, exn).toString().str();
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throwJSExecutionException("Failed to get property at index %u: %s", index, exceptionText.c_str());
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}
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return Value(m_context, property);
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}
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Value Object::getProperty(const char *propName) const {
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return getProperty(String(propName));
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}
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void Object::setProperty(const String& propName, const Value& value) const {
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JSValueRef exn = NULL;
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JSObjectSetProperty(m_context, m_obj, propName, value, kJSPropertyAttributeNone, &exn);
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if (exn) {
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std::string exceptionText = Value(m_context, exn).toString().str();
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throwJSExecutionException("Failed to set property: %s", exceptionText.c_str());
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}
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}
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void Object::setProperty(const char *propName, const Value& value) const {
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setProperty(String(propName), value);
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}
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std::vector<std::string> Object::getPropertyNames() const {
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std::vector<std::string> names;
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auto namesRef = JSObjectCopyPropertyNames(m_context, m_obj);
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size_t count = JSPropertyNameArrayGetCount(namesRef);
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for (size_t i = 0; i < count; i++) {
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auto string = String::ref(JSPropertyNameArrayGetNameAtIndex(namesRef, i));
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names.emplace_back(string.str());
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}
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JSPropertyNameArrayRelease(namesRef);
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return names;
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}
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std::unordered_map<std::string, std::string> Object::toJSONMap() const {
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std::unordered_map<std::string, std::string> map;
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auto namesRef = JSObjectCopyPropertyNames(m_context, m_obj);
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size_t count = JSPropertyNameArrayGetCount(namesRef);
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for (size_t i = 0; i < count; i++) {
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auto key = String::ref(JSPropertyNameArrayGetNameAtIndex(namesRef, i));
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map.emplace(key.str(), getProperty(key).toJSONString());
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}
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JSPropertyNameArrayRelease(namesRef);
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return map;
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}
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/* static */
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Object Object::create(JSContextRef ctx) {
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JSObjectRef newObj = JSObjectMake(
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ctx,
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NULL, // create instance of default object class
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NULL); // no private data
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return Object(ctx, newObj);
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}
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} }
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