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https://github.com/p-ranav/indicators.git
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API change - progress bar can be constructed with proper settings.
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Dawid Pilarski
308
include/indicators/setting.hpp
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308
include/indicators/setting.hpp
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/*
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Activity Indicators for Modern C++
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https://github.com/p-ranav/indicators
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Licensed under the MIT License <http://opensource.org/licenses/MIT>.
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SPDX-License-Identifier: MIT
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Copyright (c) 2019 Pranav Srinivas Kumar <pranav.srinivas.kumar@gmail.com>.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#pragma once
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#include <cstddef>
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#include <indicators/color.hpp>
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#include <string>
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#include <type_traits>
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#include <utility>
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namespace indicators{
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enum class ProgressBarOption{
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BAR_WIDTH=0,
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PREFIX_TEXT,
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POSTFIX_TEXT,
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START,
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END,
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FILL,
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LEAD,
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REMAINDER,
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MAX_POSTFIX_TEXT_LEN,
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COMPLETED,
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SHOW_PERCENTAGE,
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SHOW_ELAPSED_TIME,
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SHOW_REMAINING_TIME,
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SAVED_START_TIME,
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FOREGROUND_COLOR,
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};
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template <typename T, ProgressBarOption Id>
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struct Setting{
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template <typename... Args, typename = typename std::enable_if<std::is_constructible<T, Args...>::value>::type>
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explicit Setting(Args&&... args) : value(std::forward<Args>(args)...){}
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static constexpr auto id = Id;
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using type = T;
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T value;
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};
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template <typename T>
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struct is_setting : std::false_type{};
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template <ProgressBarOption Id, typename T>
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struct is_setting<Setting<T, Id>> : std::true_type{};
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template <typename T, typename... Args>
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struct are_settings_impl{
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static constexpr bool value = is_setting<T>::value && are_settings_impl<Args...>::value;
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};
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template <typename T>
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struct are_settings_impl<T> : is_setting<T>{};
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template <typename... Args>
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struct are_settings{
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static constexpr bool value = are_settings_impl<Args...>::value;
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};
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template <>
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struct are_settings<>{
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static constexpr bool value = true;
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};
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namespace detail{
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template <ProgressBarOption Id>
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struct always_true{
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static constexpr auto value = true;
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};
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template <ProgressBarOption Id>
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struct get_ret_type;
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template<ProgressBarOption Id>
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typename get_ret_type<Id>::type get(){
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static_assert(!always_true<Id>::value, "No default value for option specified!");
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} // customization point, should never be called
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template <ProgressBarOption Id, typename T, typename... Args>
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auto get(T&& first, Args&&... tail) -> typename std::enable_if<
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(std::decay<T>::type::id == Id),
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decltype(std::forward<T>(first).value)>
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::type{
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return std::forward<T>(first).value;
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}
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template <ProgressBarOption Id, typename T, typename... Args>
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auto get(T&& first, Args&&... tail) -> typename std::enable_if<
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(std::decay<T>::type::id != Id),
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decltype(get<Id>(std::forward<Args>(tail)...))>::type{
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return get<Id>(std::forward<Args>(tail)...);
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}
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}
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template <ProgressBarOption Id, typename... Args, typename = typename std::enable_if<are_settings<Args...>::value, void>::type>
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auto get(Args&&... args) -> decltype(detail::get<Id>(std::forward<Args>(args)...)){
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return detail::get<Id>(std::forward<Args>(args)...);
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}
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template <ProgressBarOption Id>
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using StringSetting = Setting<std::string, Id>;
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template <ProgressBarOption Id>
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using IntegerSetting = Setting<std::size_t, Id>;
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template <ProgressBarOption Id>
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using BooleanSetting = Setting<bool, Id>;
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namespace option{
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using BarWidth = IntegerSetting<ProgressBarOption::BAR_WIDTH>;
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using PrefixText = StringSetting<ProgressBarOption::PREFIX_TEXT>;
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using PostfixText = StringSetting<ProgressBarOption::POSTFIX_TEXT>;
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using Start = StringSetting<ProgressBarOption::START>;
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using End = StringSetting<ProgressBarOption::END>;
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using Fill = StringSetting<ProgressBarOption::FILL>;
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using Lead = StringSetting<ProgressBarOption::LEAD>;
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using Remainder = StringSetting<ProgressBarOption::REMAINDER>;
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using MaxPostfixTextLen = IntegerSetting<ProgressBarOption::MAX_POSTFIX_TEXT_LEN>;
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using Completed = BooleanSetting<ProgressBarOption::COMPLETED>;
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using ShowPercentage = BooleanSetting<ProgressBarOption::SHOW_PERCENTAGE>;
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using ShowElapsedTime = BooleanSetting<ProgressBarOption::SHOW_ELAPSED_TIME>;
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using ShowRemainingTime = BooleanSetting<ProgressBarOption::SHOW_REMAINING_TIME>;
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using SavedStartTime = BooleanSetting<ProgressBarOption::SAVED_START_TIME>;
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using ForegroundColor = Setting<Color, ProgressBarOption::FOREGROUND_COLOR>;
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}
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namespace detail{
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template<>
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struct get_ret_type<ProgressBarOption::BAR_WIDTH>{
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using type = std::size_t;
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};
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template<> get_ret_type<ProgressBarOption::BAR_WIDTH>::type
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get<ProgressBarOption::BAR_WIDTH>(){
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return std::size_t{100};
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}
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template<>
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struct get_ret_type<ProgressBarOption::PREFIX_TEXT>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::PREFIX_TEXT>::type
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get<ProgressBarOption::PREFIX_TEXT>(){
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return std::string{};
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}
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template<>
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struct get_ret_type<ProgressBarOption::POSTFIX_TEXT>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::POSTFIX_TEXT>::type
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get<ProgressBarOption::POSTFIX_TEXT>(){
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return std::string{};
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}
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template<>
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struct get_ret_type<ProgressBarOption::START>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::START>::type
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get<ProgressBarOption::START>(){
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return std::string{"["};
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}
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template<>
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struct get_ret_type<ProgressBarOption::FILL>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::FILL>::type
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get<ProgressBarOption::FILL>(){
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return std::string{"="};
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}
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template<>
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struct get_ret_type<ProgressBarOption::LEAD>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::LEAD>::type
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get<ProgressBarOption::LEAD>(){
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return std::string{">"};
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}
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template<>
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struct get_ret_type<ProgressBarOption::REMAINDER>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::REMAINDER>::type
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get<ProgressBarOption::REMAINDER>(){
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return std::string{" "};
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}
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template<>
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struct get_ret_type<ProgressBarOption::END>{
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using type = std::string;
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};
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template<> get_ret_type<ProgressBarOption::END>::type
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get<ProgressBarOption::END>(){
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return std::string{"]"};
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}
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template<>
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struct get_ret_type<ProgressBarOption::MAX_POSTFIX_TEXT_LEN>{
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using type = std::size_t;
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};
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template<> get_ret_type<ProgressBarOption::MAX_POSTFIX_TEXT_LEN>::type
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get<ProgressBarOption::MAX_POSTFIX_TEXT_LEN>(){
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return std::size_t{0};
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}
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template<>
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struct get_ret_type<ProgressBarOption::COMPLETED>{
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using type = bool;
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};
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template<> get_ret_type<ProgressBarOption::COMPLETED>::type
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get<ProgressBarOption::COMPLETED>(){
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return false;
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}
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template<>
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struct get_ret_type<ProgressBarOption::SHOW_PERCENTAGE>{
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using type = bool;
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};
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template<> get_ret_type<ProgressBarOption::SHOW_PERCENTAGE>::type
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get<ProgressBarOption::SHOW_PERCENTAGE>(){
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return true;
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}
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template<>
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struct get_ret_type<ProgressBarOption::SHOW_ELAPSED_TIME>{
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using type = bool;
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};
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template<> get_ret_type<ProgressBarOption::SHOW_ELAPSED_TIME>::type
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get<ProgressBarOption::SHOW_ELAPSED_TIME>(){
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return false;
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}
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template<>
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struct get_ret_type<ProgressBarOption::SHOW_REMAINING_TIME>{
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using type = bool;
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};
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template<> get_ret_type<ProgressBarOption::SHOW_REMAINING_TIME>::type
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get<ProgressBarOption::SHOW_REMAINING_TIME>(){
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return false;
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}
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template<>
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struct get_ret_type<ProgressBarOption::SAVED_START_TIME>{
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using type = bool;
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};
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template<> get_ret_type<ProgressBarOption::SAVED_START_TIME>::type
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get<ProgressBarOption::SAVED_START_TIME>(){
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return false;
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}
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template<>
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struct get_ret_type<ProgressBarOption::FOREGROUND_COLOR>{
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using type = ::indicators::Color;
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};
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template<> get_ret_type<ProgressBarOption::FOREGROUND_COLOR>::type
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get<ProgressBarOption::FOREGROUND_COLOR>(){
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return ::indicators::Color::WHITE;
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}
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}
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}
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