/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file strings_type.h Types related to strings. */

#ifndef STRINGS_TYPE_H
#define STRINGS_TYPE_H

/**
 * Numeric value that represents a string, independent of the selected language.
 */
typedef uint16 StringID;
static const StringID INVALID_STRING_ID = 0xFFFF;  ///< Constant representing an invalid string
static const int MAX_CHAR_LENGTH = 4; ///< Max. length of UTF-8 encoded unicode character

enum {
	MAX_LANG = 64, ///< Maximal number of languages supported by the game
};

/** Directions a text can go to */
enum TextDirection {
	TD_LTR, ///< Text is written left-to-right by default
	TD_RTL, ///< Text is written right-to-left by default
};

/** Information about a language */
struct Language {
	char *name; ///< The internal name of the language
	char *file; ///< The name of the language as it appears on disk
};

/** Used for dynamic language support */
struct DynamicLanguages {
	int num;                  ///< Number of languages
	int curr;                 ///< Currently selected language index
	char curr_file[MAX_PATH]; ///< Currently selected language file name without path (needed for saving the filename of the loaded language).
	TextDirection text_dir;   ///< Text direction of the currently selected language
	Language ent[MAX_LANG];   ///< Information about the languages
};

/** Special string constants */
enum SpecialStrings {

	/* special strings for town names. the town name is generated dynamically on request. */
	SPECSTR_TOWNNAME_START     = 0x20C0,
	SPECSTR_TOWNNAME_ENGLISH   = SPECSTR_TOWNNAME_START,
	SPECSTR_TOWNNAME_FRENCH,
	SPECSTR_TOWNNAME_GERMAN,
	SPECSTR_TOWNNAME_AMERICAN,
	SPECSTR_TOWNNAME_LATIN,
	SPECSTR_TOWNNAME_SILLY,
	SPECSTR_TOWNNAME_SWEDISH,
	SPECSTR_TOWNNAME_DUTCH,
	SPECSTR_TOWNNAME_FINNISH,
	SPECSTR_TOWNNAME_POLISH,
	SPECSTR_TOWNNAME_SLOVAK,
	SPECSTR_TOWNNAME_NORWEGIAN,
	SPECSTR_TOWNNAME_HUNGARIAN,
	SPECSTR_TOWNNAME_AUSTRIAN,
	SPECSTR_TOWNNAME_ROMANIAN,
	SPECSTR_TOWNNAME_CZECH,
	SPECSTR_TOWNNAME_SWISS,
	SPECSTR_TOWNNAME_DANISH,
	SPECSTR_TOWNNAME_TURKISH,
	SPECSTR_TOWNNAME_ITALIAN,
	SPECSTR_TOWNNAME_CATALAN,
	SPECSTR_TOWNNAME_LAST      = SPECSTR_TOWNNAME_CATALAN,

	/* special strings for player names on the form "TownName transport". */
	SPECSTR_PLAYERNAME_START   = 0x70EA,
	SPECSTR_PLAYERNAME_ENGLISH = SPECSTR_PLAYERNAME_START,
	SPECSTR_PLAYERNAME_FRENCH,
	SPECSTR_PLAYERNAME_GERMAN,
	SPECSTR_PLAYERNAME_AMERICAN,
	SPECSTR_PLAYERNAME_LATIN,
	SPECSTR_PLAYERNAME_SILLY,
	SPECSTR_PLAYERNAME_LAST    = SPECSTR_PLAYERNAME_SILLY,

	SPECSTR_ANDCO_NAME         = 0x70E6,
	SPECSTR_PRESIDENT_NAME     = 0x70E7,
	SPECSTR_SONGNAME           = 0x70E8,

	/* reserve MAX_LANG strings for the *.lng files */
	SPECSTR_LANGUAGE_START     = 0x7100,
	SPECSTR_LANGUAGE_END       = SPECSTR_LANGUAGE_START + MAX_LANG - 1,

	/* reserve 32 strings for various screen resolutions */
	SPECSTR_RESOLUTION_START   = SPECSTR_LANGUAGE_END + 1,
	SPECSTR_RESOLUTION_END     = SPECSTR_RESOLUTION_START + 0x1F,

	/* reserve 32 strings for screenshot formats */
	SPECSTR_SCREENSHOT_START   = SPECSTR_RESOLUTION_END + 1,
	SPECSTR_SCREENSHOT_END     = SPECSTR_SCREENSHOT_START + 0x1F,
};

#endif /* STRINGS_TYPE_H */