History.cpp

#include "History.h"

History::History(std::size_t maxDepth) : m_max(maxDepth) {}

void History::clear() { m_undo.clear(); m_redo.clear(); }

void History::push(const sf::Image& img) {
    m_undo.push_back(img);                 // <-- áîëüøå ÍÅ ôèëüòðóåì ïî "imagesEqual"
    if (m_undo.size() > m_max) m_undo.erase(m_undo.begin());
    m_redo.clear();
}

bool History::canUndo() const { return !m_undo.empty(); }

bool History::canRedo() const { return !m_redo.empty(); }

bool History::undo(const sf::Image& current, sf::Image& out) {
    if (m_undo.empty()) return false;
    out = m_undo.back();
    m_undo.pop_back();
    m_redo.push_back(current);
    return true;
}

bool History::redo(const sf::Image& current, sf::Image& out) {
    if (m_redo.empty()) return false;
    out = m_redo.back();
    m_redo.pop_back();
    m_undo.push_back(current);
    return true;
}