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/*************************************************************************/
/*  flow_container.h                                                     */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#ifndef FLOW_CONTAINER_H
#define FLOW_CONTAINER_H

#include "scene/gui/container.h"

class FlowContainer : public Container {
	GDCLASS(FlowContainer, Container);

public:
	enum AlignmentMode {
		ALIGNMENT_BEGIN,
		ALIGNMENT_CENTER,
		ALIGNMENT_END
	};

private:
	int cached_size = 0;
	int cached_line_count = 0;

	bool vertical = false;
	AlignmentMode alignment = ALIGNMENT_BEGIN;

	struct ThemeCache {
		int h_separation = 0;
		int v_separation = 0;
	} theme_cache;

	void _resort();

protected:
	bool is_fixed = false;

	virtual void _update_theme_item_cache() override;

	void _notification(int p_what);
	void _validate_property(PropertyInfo &p_property) const;
	static void _bind_methods();

public:
	int get_line_count() const;

	void set_alignment(AlignmentMode p_alignment);
	AlignmentMode get_alignment() const;

	void set_vertical(bool p_vertical);
	bool is_vertical() const;

	virtual Size2 get_minimum_size() const override;

	virtual Vector<int> get_allowed_size_flags_horizontal() const override;
	virtual Vector<int> get_allowed_size_flags_vertical() const override;

	FlowContainer(bool p_vertical = false);
};

class HFlowContainer : public FlowContainer {
	GDCLASS(HFlowContainer, FlowContainer);

public:
	HFlowContainer() :
			FlowContainer(false) { is_fixed = true; }
};

class VFlowContainer : public FlowContainer {
	GDCLASS(VFlowContainer, FlowContainer);

public:
	VFlowContainer() :
			FlowContainer(true) { is_fixed = true; }
};

VARIANT_ENUM_CAST(FlowContainer::AlignmentMode);

#endif // FLOW_CONTAINER_H