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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibCore/Timer.h>
#include <LibGfx/Rect.h>
#include "Mask.h"
namespace PixelPaint {
class Image;
class SelectionClient {
public:
virtual void selection_did_change() = 0;
protected:
virtual ~SelectionClient() = default;
};
// Coordinates are image-relative.
class Selection {
public:
enum class MergeMode {
Set,
Add,
Subtract,
Intersect,
__Count,
};
explicit Selection(Image&);
bool is_empty() const { return m_mask.is_null(); }
void clear();
void invert();
void merge(Mask const&, MergeMode);
void merge(Gfx::IntRect const& rect, MergeMode mode) { merge(Mask::full(rect), mode); }
Gfx::IntRect bounding_rect() const { return m_mask.bounding_rect(); }
[[nodiscard]] bool is_selected(int x, int y) const { return m_mask.get(x, y) > 0; }
[[nodiscard]] bool is_selected(Gfx::IntPoint const& point) const { return is_selected(point.x(), point.y()); }
[[nodiscard]] u8 get_selection_alpha(int x, int y) const { return m_mask.get(x, y); }
[[nodiscard]] u8 get_selection_alpha(Gfx::IntPoint const& point) const { return get_selection_alpha(point.x(), point.y()); }
Mask const& mask() const { return m_mask; }
void set_mask(Mask);
void begin_interactive_selection() { m_in_interactive_selection = true; }
void end_interactive_selection() { m_in_interactive_selection = false; }
bool in_interactive_selection() const { return m_in_interactive_selection; }
void add_client(SelectionClient&);
void remove_client(SelectionClient&);
private:
Image& m_image;
Mask m_mask;
HashTable<SelectionClient*> m_clients;
bool m_in_interactive_selection { false };
};
}
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