renderbug-cpp/lib/Figments/Figment.h

#pragma once
#include <Arduino.h>
#include <functional>
#include <ArduinoLog.h>

#define F_LIKELY(x) __builtin_expect(!!(x), true)
#define F_UNLIKELY(x) __builtin_expect(!!(x), false)

class Display;
class InputEvent;
class InputSource;

struct Loopable {
    virtual void handleEvent(const InputEvent& event) {}
    virtual void loop() = 0;
};

struct Task : public virtual Loopable {
    virtual void onStart() {};
    virtual void onStop() {};

    enum State {
        Running,
        Stopped,
    };

    Task() {}
    explicit Task(const char* name) : name(name) {}

    void start() { state = Running; onStart(); }
    void stop() { onStop(); state = Stopped; }
    virtual bool isFigment() const { return false; }

    const char* name = "";
    State state = Stopped;
};

struct TaskFunc: public Task {
    TaskFunc(std::function<void()> func) : Task("lambda"), func(func) {}
    void loop() override {func();}
    std::function<void()> func;
};

struct Figment: public Task {
    Figment() : Task() {}
    explicit Figment(const char* name) : Task(name) {}
    virtual void render(Display* dpy) const = 0;
    bool isFigment() const override { return true; }
};

struct FigmentFunc: public Figment {
    FigmentFunc(std::function<void(Display*)> func) : Figment("lambda"), func(func) {}
    void loop() override {}
    void render(Display* dpy) const override {
        func(dpy);
    }
    std::function<void(Display*)> func;
};