310 lines
9.4 KiB
JavaScript
310 lines
9.4 KiB
JavaScript
/***
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MochiKit.Format 1.5
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See <http://mochikit.com/> for documentation, downloads, license, etc.
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(c) 2005 Bob Ippolito. All rights Reserved.
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***/
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MochiKit.Base.module(MochiKit, 'Format', '1.5', ['Base']);
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MochiKit.Format._numberFormatter = function (placeholder, header, footer, locale, isPercent, precision, leadingZeros, separatorAt, trailingZeros) {
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return function (num) {
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num = parseFloat(num);
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if (typeof(num) == "undefined" || num === null || isNaN(num)) {
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return placeholder;
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}
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var curheader = header;
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var curfooter = footer;
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if (num < 0) {
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num = -num;
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} else {
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curheader = curheader.replace(/-/, "");
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}
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var me = arguments.callee;
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var fmt = MochiKit.Format.formatLocale(locale);
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if (isPercent) {
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num = num * 100.0;
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curfooter = fmt.percent + curfooter;
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}
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num = MochiKit.Format.roundToFixed(num, precision);
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var parts = num.split(/\./);
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var whole = parts[0];
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var frac = (parts.length == 1) ? "" : parts[1];
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var res = "";
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while (whole.length < leadingZeros) {
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whole = "0" + whole;
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}
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if (separatorAt) {
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while (whole.length > separatorAt) {
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var i = whole.length - separatorAt;
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//res = res + fmt.separator + whole.substring(i, whole.length);
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res = fmt.separator + whole.substring(i, whole.length) + res;
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whole = whole.substring(0, i);
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}
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}
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res = whole + res;
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if (precision > 0) {
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while (frac.length < trailingZeros) {
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frac = frac + "0";
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}
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res = res + fmt.decimal + frac;
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}
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return curheader + res + curfooter;
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};
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};
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/** @id MochiKit.Format.numberFormatter */
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MochiKit.Format.numberFormatter = function (pattern, placeholder/* = "" */, locale/* = "default" */) {
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// http://java.sun.com/docs/books/tutorial/i18n/format/numberpattern.html
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// | 0 | leading or trailing zeros
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// | # | just the number
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// | , | separator
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// | . | decimal separator
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// | % | Multiply by 100 and format as percent
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if (typeof(placeholder) == "undefined") {
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placeholder = "";
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}
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var match = pattern.match(/((?:[0#]+,)?[0#]+)(?:\.([0#]+))?(%)?/);
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if (!match) {
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throw TypeError("Invalid pattern");
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}
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var header = pattern.substr(0, match.index);
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var footer = pattern.substr(match.index + match[0].length);
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if (header.search(/-/) == -1) {
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header = header + "-";
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}
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var whole = match[1];
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var frac = (typeof(match[2]) == "string" && match[2] != "") ? match[2] : "";
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var isPercent = (typeof(match[3]) == "string" && match[3] != "");
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var tmp = whole.split(/,/);
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var separatorAt;
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if (typeof(locale) == "undefined") {
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locale = "default";
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}
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if (tmp.length == 1) {
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separatorAt = null;
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} else {
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separatorAt = tmp[1].length;
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}
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var leadingZeros = whole.length - whole.replace(/0/g, "").length;
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var trailingZeros = frac.length - frac.replace(/0/g, "").length;
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var precision = frac.length;
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var rval = MochiKit.Format._numberFormatter(
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placeholder, header, footer, locale, isPercent, precision,
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leadingZeros, separatorAt, trailingZeros
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);
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var m = MochiKit.Base;
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if (m) {
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var fn = arguments.callee;
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var args = m.concat(arguments);
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rval.repr = function () {
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return [
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self.NAME,
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"(",
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m.map(m.repr, args).join(", "),
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")"
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].join("");
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};
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}
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return rval;
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};
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/** @id MochiKit.Format.formatLocale */
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MochiKit.Format.formatLocale = function (locale) {
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if (typeof(locale) == "undefined" || locale === null) {
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locale = "default";
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}
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if (typeof(locale) == "string") {
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var rval = MochiKit.Format.LOCALE[locale];
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if (typeof(rval) == "string") {
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rval = arguments.callee(rval);
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MochiKit.Format.LOCALE[locale] = rval;
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}
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return rval;
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} else {
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return locale;
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}
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};
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/** @id MochiKit.Format.twoDigitAverage */
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MochiKit.Format.twoDigitAverage = function (numerator, denominator) {
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if (denominator) {
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var res = numerator / denominator;
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if (!isNaN(res)) {
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return MochiKit.Format.twoDigitFloat(res);
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}
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}
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return "0";
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};
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/** @id MochiKit.Format.twoDigitFloat */
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MochiKit.Format.twoDigitFloat = function (aNumber) {
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var res = MochiKit.Format.roundToFixed(aNumber, 2);
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if (res.indexOf(".00") > 0) {
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return res.substring(0, res.length - 3);
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} else if (res.charAt(res.length - 1) == "0") {
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return res.substring(0, res.length - 1);
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} else {
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return res;
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}
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};
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/** @id MochiKit.Format.lstrip */
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MochiKit.Format.lstrip = function (str, /* optional */chars) {
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str = str + "";
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if (typeof(str) != "string") {
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return null;
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}
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if (!chars) {
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return str.replace(/^\s+/, "");
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} else {
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return str.replace(new RegExp("^[" + chars + "]+"), "");
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}
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};
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/** @id MochiKit.Format.rstrip */
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MochiKit.Format.rstrip = function (str, /* optional */chars) {
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str = str + "";
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if (typeof(str) != "string") {
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return null;
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}
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if (!chars) {
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return str.replace(/\s+$/, "");
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} else {
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return str.replace(new RegExp("[" + chars + "]+$"), "");
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}
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};
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/** @id MochiKit.Format.strip */
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MochiKit.Format.strip = function (str, /* optional */chars) {
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var self = MochiKit.Format;
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return self.rstrip(self.lstrip(str, chars), chars);
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};
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/** @id MochiKit.Format.truncToFixed */
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MochiKit.Format.truncToFixed = function (aNumber, precision) {
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var fixed = MochiKit.Format._numberToFixed(aNumber, precision);
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var fracPos = fixed.indexOf(".");
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if (fracPos > 0 && fracPos + precision + 1 < fixed.length) {
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fixed = fixed.substring(0, fracPos + precision + 1);
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fixed = MochiKit.Format._shiftNumber(fixed, 0);
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}
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return fixed;
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};
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/** @id MochiKit.Format.roundToFixed */
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MochiKit.Format.roundToFixed = function (aNumber, precision) {
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var fixed = MochiKit.Format._numberToFixed(aNumber, precision);
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var fracPos = fixed.indexOf(".");
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if (fracPos > 0 && fracPos + precision + 1 < fixed.length) {
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var str = MochiKit.Format._shiftNumber(fixed, precision);
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str = MochiKit.Format._numberToFixed(Math.round(parseFloat(str)), 0);
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fixed = MochiKit.Format._shiftNumber(str, -precision);
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}
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return fixed;
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};
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/**
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* Converts a number to a fixed format string. This function handles
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* conversion of exponents by shifting the decimal point to the left
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* or the right. It also guarantees a specified minimum number of
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* fractional digits (but no maximum).
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*
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* @param {Number} aNumber the number to convert
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* @param {Number} precision the minimum number of decimal digits
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*
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* @return {String} the fixed format number string
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*/
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MochiKit.Format._numberToFixed = function (aNumber, precision) {
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var str = aNumber.toString();
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var parts = str.split(/[eE]/);
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var exp = (parts.length === 1) ? 0 : parseInt(parts[1], 10) || 0;
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var fixed = MochiKit.Format._shiftNumber(parts[0], exp);
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parts = fixed.split(/\./);
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var whole = parts[0];
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var frac = (parts.length === 1) ? "" : parts[1];
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while (frac.length < precision) {
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frac += "0";
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}
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if (frac.length > 0) {
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return whole + "." + frac;
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} else {
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return whole;
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}
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};
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/**
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* Shifts the decimal dot location in a fixed format number string.
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* This function handles negative values and will add and remove
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* leading and trailing zeros as needed.
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*
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* @param {String} num the fixed format number string
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* @param {Number} exp the base-10 exponent to apply
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*
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* @return {String} the new fixed format number string
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*/
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MochiKit.Format._shiftNumber = function (num, exp) {
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var pos = num.indexOf(".");
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if (pos < 0) {
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pos = num.length;
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} else {
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num = num.substring(0, pos) + num.substring(pos + 1);
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}
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pos += exp;
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while (pos <= 0 || (pos <= 1 && num.charAt(0) === "-")) {
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if (num.charAt(0) === "-") {
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num = "-0" + num.substring(1);
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} else {
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num = "0" + num;
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}
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pos++;
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}
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while (pos > num.length) {
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num += "0";
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}
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if (pos < num.length) {
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num = num.substring(0, pos) + "." + num.substring(pos);
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}
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while (/^0[^.]/.test(num)) {
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num = num.substring(1);
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}
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while (/^-0[^.]/.test(num)) {
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num = "-" + num.substring(2);
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}
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return num;
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};
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/** @id MochiKit.Format.percentFormat */
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MochiKit.Format.percentFormat = function (aNumber) {
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return MochiKit.Format.twoDigitFloat(100 * aNumber) + '%';
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};
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MochiKit.Format.LOCALE = {
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en_US: {separator: ",", decimal: ".", percent: "%"},
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de_DE: {separator: ".", decimal: ",", percent: "%"},
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pt_BR: {separator: ".", decimal: ",", percent: "%"},
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fr_FR: {separator: " ", decimal: ",", percent: "%"},
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"default": "en_US",
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__export__: false
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};
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MochiKit.Format.__new__ = function () {
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MochiKit.Base.nameFunctions(this);
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var base = this.NAME + ".";
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var k, v, o;
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for (k in this.LOCALE) {
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o = this.LOCALE[k];
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if (typeof(o) == "object") {
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o.repr = function () { return this.NAME; };
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o.NAME = base + "LOCALE." + k;
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}
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}
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};
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MochiKit.Format.__new__();
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MochiKit.Base._exportSymbols(this, MochiKit.Format);
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