155 lines
3.9 KiB
JavaScript
155 lines
3.9 KiB
JavaScript
/*
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oolite-locale-functions.js
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This script implements certain functionality that may need to be modified when
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localizing Oolite, such as number formatting. It’s intended to be overridden
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by localization OXPs, and is loaded after oolite-global-prefix.js but before
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any “normal” world scripts.
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Oolite
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Copyright © 2004-2013 Giles C Williams and contributors
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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"use strict";
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this.name = "oolite-locale-functions";
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this.author = "Jens Ayton";
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this.copyright = "© 2012-2013 the Oolite team.";
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(function () {
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// Simple parameters. For more complex behaviour change, modify the functions that do the work.
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const minSepDigits = +expandDescription("[number-group-threshold]");
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const groupSize = +expandDescription("[number-group-size]");
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const maxTotalDigits = 16; // This is near the limit of numerical precision.
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const maxIntegerValue = Math.pow(10, maxTotalDigits);
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const radix = expandDescription("[number-decimal-separator]");
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const groupSep = expandDescription("[number-group-separator]");
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const currencyFormat = expandDescription("[@-credits]");
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// Utility to define non-enumerable, non-configurable, permanent methods, to match the behaviour of native methods.
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// FIXME: not used because global properties are not reset when resetting game.
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function defineMethod(object, name, implementation)
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{
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Object.defineProperty(object, name, { value: implementation, writable: false, configurable: false, enumerable: false });
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}
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// Internal method returns a pair [result, isScientificNotation] for the benefit of format[Deci]Credits.
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function formatPositiveIntegerInternal (value)
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{
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if (value > maxIntegerValue) return [formatScientificInternal(value), true];
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var digits = value.toString();
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var digitCount = digits.length;
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if (digitCount >= minSepDigits)
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{
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if (digitCount > maxTotalDigits) return [formatScientificInternal(value), true];
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var result = "";
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var empty = true;
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while (digitCount > groupSize)
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{
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digitCount -= groupSize;
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var group = digits.substr(digitCount, groupSize);
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if (empty)
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{
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result = group;
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empty = false;
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}
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else
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{
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result = group.concat(groupSep, result);
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}
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}
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if (digitCount > 0)
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{
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result = digits.substr(0, digitCount).concat(groupSep, result);
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}
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}
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else
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{
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var result = digits;
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}
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return [result, false];
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}
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function formatScientificInternal(value)
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{
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return value.toString();
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}
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global.formatInteger = function formatInteger(value)
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{
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var value = Math.round(+value);
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var negative = false;
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if (value < 0)
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{
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negative = true;
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value = -value;
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}
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var string = formatPositiveIntegerInternal(value)[0];
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if (negative) string = "-" + string;
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return string;
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}
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global.formatCredits = function formatCredits(value, includeDeciCredits, includeCurrencySymbol)
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{
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var negative = false;
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if (value < 0)
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{
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negative = true;
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value = -value;
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}
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value += (includeDeciCredits ? 0.05 : 0.5);
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var floor = Math.floor(value);
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var [string, isSciNotation] = formatPositiveIntegerInternal(floor);
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if (includeDeciCredits && !isSciNotation)
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{
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var frac = Math.floor(((value - floor) * 10));
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string = string.concat(radix, frac.toString());
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}
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if (includeCurrencySymbol)
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{
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string = currencyFormat.replace("%@", string);
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}
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if (negative) string = "-" + string;
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return string;
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}
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})();
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