elementInput.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 13.10.2025.
//
#pragma once
 
#include <SDL3/SDL_render.h>
 
#include <memory>
#include <string>
#include <unordered_map>
 
#include "core/math/vector2.h"
#include "framework/components/element/elementComponent.h"
 
namespace visutwin::canvas
{
    class Engine;
    class ElementComponent;
    class Entity;
    class Mesh;
    class RenderComponent;
    class StandardMaterial;

    class ElementInput
    {
    public:
        void setEngine(const std::shared_ptr<Engine>& engine) { _engine = engine; }
        void setSdlRenderer(SDL_Renderer* renderer) { _sdlRenderer = renderer; }
 
        void detach();
        bool handleMouseButtonDown(float x, float y);
        void renderElements();
        void syncTextElements();
 
    private:
        struct TextVisual
        {
            Entity* entity = nullptr;
            RenderComponent* render = nullptr;
            std::shared_ptr<Mesh> mesh;
            std::shared_ptr<StandardMaterial> material;
            std::string cachedText;
            int cachedFontSize = 0;
            float cachedWidth = 0.0f;
            float cachedHeight = 0.0f;
            Vector2 cachedPivot = Vector2(0.5f, 0.5f);
            ElementHorizontalAlign cachedAlign = ElementHorizontalAlign::Center;
            bool cachedWrap = false;
            FontResource* cachedFont = nullptr;
            bool activeFrame = false;
        };
 
        bool computeElementRect(const ElementComponent* element, SDL_FRect& outRect) const;
 
        std::shared_ptr<Engine> _engine;
        SDL_Renderer* _sdlRenderer = nullptr;
        std::unordered_map<ElementComponent*, TextVisual> _textVisuals;
    };
}