/**************************************************************************/
/*  theme_owner.h                                                         */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* 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  */
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/**************************************************************************/

#pragma once

#include "core/object/object.h"
#include "scene/resources/theme.h"

class Control;
class Node;
class ThemeContext;
class Window;

class ThemeOwner : public Object {
	GDSOFTCLASS(ThemeOwner, Object);

	Node *holder = nullptr;

	Node *owner_node = nullptr;
	ThemeContext *owner_context = nullptr;

	void _owner_context_changed();
	ThemeContext *_get_active_owner_context() const;

	Node *_get_next_owner_node(Node *p_from_node) const;
	Ref<Theme> _get_owner_node_theme(Node *p_owner_node) const;

public:
	// Theme owner node.

	void set_owner_node(Node *p_node);
	Node *get_owner_node() const { return owner_node; }
	bool has_owner_node() const { return owner_node != nullptr; }

	void set_owner_context(ThemeContext *p_context, bool p_propagate = true);

	// Theme propagation.

	void assign_theme_on_parented(Node *p_for_node);
	void clear_theme_on_unparented(Node *p_for_node);
	void propagate_theme_changed(Node *p_to_node, Node *p_owner_node, bool p_notify, bool p_assign);

	// Theme lookup.

	void get_theme_type_dependencies(const Node *p_for_node, const StringName &p_theme_type, Vector<StringName> &r_result) const;

	Variant get_theme_item_in_types(Theme::DataType p_data_type, const StringName &p_name, const Vector<StringName> &p_theme_types);
	bool has_theme_item_in_types(Theme::DataType p_data_type, const StringName &p_name, const Vector<StringName> &p_theme_types);

	float get_theme_default_base_scale();
	Ref<Font> get_theme_default_font();
	int get_theme_default_font_size();

	ThemeOwner(Node *p_holder) { holder = p_holder; }
};
