ATextLayoutHelper.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
//
// Created by Alex2772 on 11/28/2021.
//
 
#pragma once
 
#include <AUI/Common/AVector.h>
#include <AUI/Font/AFontStyle.h>
#include <glm/glm.hpp>

class ATextLayoutHelper {
public:
   struct Boundary {
       glm::ivec2 position;
   };

   using Line = AVector<Boundary>;
   using Symbols = AVector<Line>;
 
private:
   Symbols mSymbols;
 
   static size_t xToIndex(const AVector<Boundary>& line, int pos);
 
public:
   ATextLayoutHelper() = default;
   explicit ATextLayoutHelper(Symbols symbols) : mSymbols(std::move(symbols)) {}
 
   void setSymbols(Symbols symbols) {
       mSymbols = std::move(symbols);
   }
 
   [[nodiscard]]
   AOptional<glm::ivec2> indexToPos(size_t line, size_t column);
 
   [[nodiscard]]
   size_t posToIndexFixedLineHeight(const glm::ivec2& position, const AFontStyle& font) const;
};

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