/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
 *
 *                                                         Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
 *                                               .)j(] .d_/ '-(  P .   S
 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
 * Redistribution and use in source and          _dV>ws?a-?'      ._/L  #'
 * binary forms, with or without                 )4d[#7r, .   '     )d`)[
 * modification, are permitted provided         _Q-5'5W..j/?'   -?!\)cam'
 * that the following conditions are met:       j<<WP+k/);.        _W=j f
 * 1. Redistributions of source code must       .$%w\/]Q  . ."'  .  mj$
 *    retain the above copyright notice,        ]E.pYY(Q]>.   a     J@\
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 */

#ifndef GCN_FONT_HPP
#define GCN_FONT_HPP

#include <string>
#include "guisan/platform.hpp"

namespace gcn
{
	class Graphics;

	/**
	 * Holder of a font. Fonts should inherit from this class and
	 * implements it's functions.
	 *
	 * @see ImageFont
	 */
	class GCN_CORE_DECLSPEC Font
	{
	public:

		/**
		 * Destructor.
		 */
		virtual ~Font() = default;

		/**
		 * Gets the width of a string. The width of a string is not necesserily
		 * the sum of all the widths of it's glyphs.
		 *
		 * @param text the string to return the width of.
		 * @return the width of a string.
		 */
		[[nodiscard]] virtual int getWidth(const std::string& text) const = 0;

		/**
		 * Gets the height of the glyphs in the font.
		 *
		 * @return the height of the glyphs int the font.
		 */
		[[nodiscard]] virtual int getHeight() const = 0;

		/**
		 * Gets a string index in a string providing an x coordinate.
		 * Used to retrive a string index (for a character in a
		 * string) at a certain x position. It is especially useful
		 * when a mouse clicks in a TextField and you want to know which
		 * character was clicked.
		 *
		 * @return a string index in a string providing an x coordinate.
		 */
		virtual int getStringIndexAt(const std::string& text, int x);

		/**
		 * Draws a string.
		 *
		 * NOTE: You normally won't use this function to draw text since
		 *       Graphics contains better functions for drawing text.
		 *
		 * @param graphics a Graphics object to use for drawing.
		 * @param text the string to draw.
		 * @param x the x coordinate where to draw the string.
		 * @param y the y coordinate where to draw the string.
		 */
		virtual void drawString(Graphics* graphics, const std::string& text,
								int x, int y) = 0;
	};
}

#endif // end GCN_FONT_HPP