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83da74b556
Summary: Simplies UIManager a bit and some other tweaks Reviewed By: shergin Differential Revision: D10211883 fbshipit-source-id: 93ab23dd2baab2fdc6d9c54e976b001a19efab7f
107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <fabric/graphics/Color.h>
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#include <fabric/graphics/Geometry.h>
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#include <fabric/graphics/conversions.h>
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#include <folly/Optional.h>
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#include <folly/dynamic.h>
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namespace facebook {
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namespace react {
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inline void fromDynamic(const folly::dynamic &value, bool &result) {
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result = value.getBool();
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}
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inline void fromDynamic(const folly::dynamic &value, int &result) {
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// All numbers from JS are treated as double, and JS cannot represent int64 in
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// practice. So this always converts the value to int64 instead.
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result = value.asInt();
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}
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inline void fromDynamic(const folly::dynamic &value, float &result) {
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result = (float)value.asDouble();
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}
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inline void fromDynamic(const folly::dynamic &value, double &result) {
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result = value.asDouble();
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}
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inline void fromDynamic(const folly::dynamic &value, std::string &result) {
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result = value.getString();
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}
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inline void fromDynamic(const folly::dynamic &value, folly::dynamic &result) {
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result = value;
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}
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template <typename T>
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inline void fromDynamic(const folly::dynamic &value, std::vector<T> &result) {
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if (!value.isArray()) {
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T itemResult;
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fromDynamic(value, itemResult);
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result = {itemResult};
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return;
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}
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result.clear();
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T itemResult;
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for (auto &itemValue : value) {
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fromDynamic(itemValue, itemResult);
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result.push_back(itemResult);
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}
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}
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template <typename T>
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inline T convertRawProp(
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const RawProps &rawProps,
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const std::string &name,
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const T &sourceValue,
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const T &defaultValue = T()) {
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const auto &iterator = rawProps.find(name);
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if (iterator == rawProps.end()) {
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return sourceValue;
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}
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const auto &value = iterator->second;
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// Special case: `null` always means `the prop was removed, use default
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// value`.
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if (value.isNull()) {
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return defaultValue;
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}
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T result;
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fromDynamic(value, result);
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return result;
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}
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template <typename T>
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inline static folly::Optional<T> convertRawProp(
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const RawProps &rawProps,
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const std::string &name,
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const folly::Optional<T> &sourceValue,
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const folly::Optional<T> &defaultValue = {}) {
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const auto &iterator = rawProps.find(name);
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if (iterator == rawProps.end()) {
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return sourceValue;
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}
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const auto &value = iterator->second;
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// Special case: `null` always means `the prop was removed, use default
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// value`.
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if (value.isNull()) {
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return defaultValue;
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}
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T result;
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fromDynamic(value, result);
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return result;
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}
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} // namespace react
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} // namespace facebook
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