/*************************************************************************/
/*  syntax_highlighter.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 SYNTAX_HIGHLIGHTER_H
#define SYNTAX_HIGHLIGHTER_H

#include "core/io/resource.h"
#include "core/object/gdvirtual.gen.inc"
#include "core/object/script_language.h"

class TextEdit;

class SyntaxHighlighter : public Resource {
	GDCLASS(SyntaxHighlighter, Resource)

private:
	RBMap<int, Dictionary> highlighting_cache;
	void _lines_edited_from(int p_from_line, int p_to_line);

protected:
	ObjectID text_edit_instance_id; // For validity check
	TextEdit *text_edit = nullptr;

	static void _bind_methods();

	GDVIRTUAL1RC(Dictionary, _get_line_syntax_highlighting, int)
	GDVIRTUAL0(_clear_highlighting_cache)
	GDVIRTUAL0(_update_cache)
public:
	Dictionary get_line_syntax_highlighting(int p_line);
	virtual Dictionary _get_line_syntax_highlighting_impl(int p_line) { return Dictionary(); }

	void clear_highlighting_cache();
	virtual void _clear_highlighting_cache() {}

	void update_cache();
	virtual void _update_cache() {}

	void set_text_edit(TextEdit *p_text_edit);
	TextEdit *get_text_edit();

	SyntaxHighlighter() {}
	virtual ~SyntaxHighlighter() {}
};

///////////////////////////////////////////////////////////////////////////////

class CodeHighlighter : public SyntaxHighlighter {
	GDCLASS(CodeHighlighter, SyntaxHighlighter)

private:
	struct ColorRegion {
		Color color;
		String start_key;
		String end_key;
		bool line_only = false;
	};
	Vector<ColorRegion> color_regions;
	HashMap<int, int> color_region_cache;

	Dictionary keywords;
	Dictionary member_keywords;

	Color font_color;
	Color member_color;
	Color function_color;
	Color symbol_color;
	Color number_color;

protected:
	static void _bind_methods();

public:
	virtual Dictionary _get_line_syntax_highlighting_impl(int p_line) override;

	virtual void _clear_highlighting_cache() override;
	virtual void _update_cache() override;

	void add_keyword_color(const String &p_keyword, const Color &p_color);
	void remove_keyword_color(const String &p_keyword);
	bool has_keyword_color(const String &p_keyword) const;
	Color get_keyword_color(const String &p_keyword) const;

	void set_keyword_colors(const Dictionary p_keywords);
	void clear_keyword_colors();
	Dictionary get_keyword_colors() const;

	void add_member_keyword_color(const String &p_member_keyword, const Color &p_color);
	void remove_member_keyword_color(const String &p_member_keyword);
	bool has_member_keyword_color(const String &p_member_keyword) const;
	Color get_member_keyword_color(const String &p_member_keyword) const;

	void set_member_keyword_colors(const Dictionary &p_color_regions);
	void clear_member_keyword_colors();
	Dictionary get_member_keyword_colors() const;

	void add_color_region(const String &p_start_key, const String &p_end_key, const Color &p_color, bool p_line_only = false);
	void remove_color_region(const String &p_start_key);
	bool has_color_region(const String &p_start_key) const;

	void set_color_regions(const Dictionary &p_member_keyword);
	void clear_color_regions();
	Dictionary get_color_regions() const;

	void set_number_color(Color p_color);
	Color get_number_color() const;

	void set_symbol_color(Color p_color);
	Color get_symbol_color() const;

	void set_function_color(Color p_color);
	Color get_function_color() const;

	void set_member_variable_color(Color p_color);
	Color get_member_variable_color() const;
};

#endif