author | František Kučera <franta-hg@frantovo.cz> |
Fri, 12 Jan 2024 00:45:40 +0100 | |
branch | v_0 |
changeset 40 | df1376ef9f6d |
parent 35 | dcb2ad86e23c |
permissions | -rw-r--r-- |
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/** |
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* OHP3D |
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* Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, version 3 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include <vector> |
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#include <string> |
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#include "Configuration.h" |
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class CLIParser { |
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private: |
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static const std::string OPTION_DOCUMENT; |
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static const std::string OPTION_SHADER; |
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static const std::string OPTION_BACKGROUND_COLOR; |
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static const std::string OPTION_ROOT_WINDOW; |
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static const std::string OPTION_DPI; |
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const std::string |
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readNext(const std::vector<std::string>& arguments, int& i) { |
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if (i < arguments.size()) return arguments[i++]; |
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else throw std::logic_error("Missing CLI argument" |
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+ (i > 0 ? (" after " + arguments[i - 1]) : "")); |
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} |
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bool parseBoolean(const std::string& value) { |
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if (value == "true") return true; |
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else if (value == "false") return false; |
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else throw std::logic_error("Unable to parse boolean value: " |
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+ value + " (expecting true or false)"); |
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} |
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unsigned long |
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parseHexColor(const std::string& hex) { |
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size_t count; |
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unsigned long rgb = std::stoul(hex, &count, 16); |
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if (count == 6 || count == 8 && hex.starts_with("0x")) return rgb; |
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else throw std::logic_error("Invalid hex color string"); |
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// the input should be (0x)?[0-9a-fA-F]{6}, however: |
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// values like 0x0123 are also accepted and interpreted as 000123 |
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// values like +0x012 are also accepted and interpreted as 000012 |
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} |
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unsigned long |
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parseUL(const std::string& str) { |
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int base = str.starts_with("0x") ? 16 : 10; |
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return std::stoul(str, nullptr, base); |
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} |
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public: |
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const Configuration parse(const std::vector<std::string>& arguments) { |
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Configuration c; |
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for (int i = 0; i < arguments.size();) { |
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const std::string& option = readNext(arguments, i); |
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if (option == OPTION_DOCUMENT) { |
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Configuration::Document document; |
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document.fileName = readNext(arguments, i); |
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c.documents.push_back(document); |
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} else if (option == OPTION_DPI) { |
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// intentionally not documented |
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// will be probably replaced with absolute resolution |
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// or removed (dynamic rendering accorging to the zoom level) |
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c.dpi = std::stod(readNext(arguments, i)); |
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} else if (option == OPTION_SHADER) { |
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const auto type = readNext(arguments, i); |
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const auto file = readNext(arguments, i); |
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c.shaders.push_back({file, type}); |
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} else if (option == OPTION_BACKGROUND_COLOR) { |
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c.backgroundColor = parseHexColor(readNext(arguments, i)); |
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} else if (option == OPTION_ROOT_WINDOW) { |
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c.rootWindow = parseUL(readNext(arguments, i)); |
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} else throw std::logic_error("Unsupported CLI option: " + option); |
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} |
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return c; |
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} |
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}; |
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const std::string CLIParser::OPTION_DOCUMENT = "--document"; |
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const std::string CLIParser::OPTION_SHADER = "--shader"; |
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const std::string CLIParser::OPTION_BACKGROUND_COLOR = "--background-color"; |
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const std::string CLIParser::OPTION_ROOT_WINDOW = "--root-window"; |
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const std::string CLIParser::OPTION_DPI = "--dpi"; |