Éric Lemoine
877 lines
26 KiB
JavaScript
877 lines
26 KiB
JavaScript
// Copyright 2006 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview Number format/parse library with locale support.
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*/
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/**
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* Namespace for locale number format functions
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*/
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goog.provide('goog.i18n.NumberFormat');
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goog.provide('goog.i18n.NumberFormat.CurrencyStyle');
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goog.provide('goog.i18n.NumberFormat.Format');
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goog.require('goog.i18n.NumberFormatSymbols');
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goog.require('goog.i18n.currency');
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/**
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* Constructor of NumberFormat.
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* @param {number|string} pattern The number that indicates a predefined
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* number format pattern.
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* @param {string=} opt_currency Optional international currency
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* code. This determines the currency code/symbol used in format/parse. If
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* not given, the currency code for current locale will be used.
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* @param {number=} opt_currencyStyle currency style, value defined in
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* goog.i18n.NumberFormat.CurrencyStyle.
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* @constructor
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*/
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goog.i18n.NumberFormat = function(pattern, opt_currency, opt_currencyStyle) {
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this.intlCurrencyCode_ = opt_currency ||
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goog.i18n.NumberFormatSymbols.DEF_CURRENCY_CODE;
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this.currencyStyle_ = opt_currencyStyle ||
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goog.i18n.NumberFormat.CurrencyStyle.LOCAL;
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this.maximumIntegerDigits_ = 40;
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this.minimumIntegerDigits_ = 1;
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this.maximumFractionDigits_ = 3; // invariant, >= minFractionDigits
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this.minimumFractionDigits_ = 0;
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this.minExponentDigits_ = 0;
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this.useSignForPositiveExponent_ = false;
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this.positivePrefix_ = '';
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this.positiveSuffix_ = '';
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this.negativePrefix_ = '-';
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this.negativeSuffix_ = '';
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// The multiplier for use in percent, per mille, etc.
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this.multiplier_ = 1;
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this.groupingSize_ = 3;
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this.decimalSeparatorAlwaysShown_ = false;
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this.useExponentialNotation_ = false;
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if (typeof pattern == 'number') {
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this.applyStandardPattern_(pattern);
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} else {
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this.applyPattern_(pattern);
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}
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};
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/**
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* Standard number formatting patterns.
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* @enum {number}
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*/
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goog.i18n.NumberFormat.Format = {
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DECIMAL: 1,
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SCIENTIFIC: 2,
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PERCENT: 3,
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CURRENCY: 4
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};
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/**
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* Currency styles.
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* @enum {number}
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*/
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goog.i18n.NumberFormat.CurrencyStyle = {
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LOCAL: 0, // currency style as it is used in its circulating country.
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PORTABLE: 1, // currency style that differentiate it from other popular ones.
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GLOBAL: 2 // currency style that is unique among all currencies.
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};
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/**
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* If the usage of Ascii digits should be enforced.
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* @type {boolean}
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* @private
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*/
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goog.i18n.NumberFormat.enforceAsciiDigits_ = false;
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/**
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* Set if the usage of Ascii digits in formatting should be enforced.
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* @param {boolean} doEnforce Boolean value about if Ascii digits should be
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* enforced.
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*/
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goog.i18n.NumberFormat.setEnforceAsciiDigits = function(doEnforce) {
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goog.i18n.NumberFormat.enforceAsciiDigits_ = doEnforce;
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};
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/**
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* Return if Ascii digits is enforced.
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* @return {boolean} If Ascii digits is enforced.
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*/
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goog.i18n.NumberFormat.isEnforceAsciiDigits = function() {
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return goog.i18n.NumberFormat.enforceAsciiDigits_;
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};
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/**
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* Sets minimum number of fraction digits.
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* @param {number} min the minimum.
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*/
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goog.i18n.NumberFormat.prototype.setMinimumFractionDigits = function(min) {
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if (min > this.maximumFractionDigits_) {
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throw Error('Min value must be less than max value');
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}
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this.minimumFractionDigits_ = min;
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};
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/**
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* Sets maximum number of fraction digits.
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* @param {number} max the maximum.
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*/
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goog.i18n.NumberFormat.prototype.setMaximumFractionDigits = function(max) {
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if (this.minimumFractionDigits_ > max) {
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throw Error('Min value must be less than max value');
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}
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this.maximumFractionDigits_ = max;
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};
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/**
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* Apply provided pattern, result are stored in member variables.
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*
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* @param {string} pattern String pattern being applied.
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* @private
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*/
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goog.i18n.NumberFormat.prototype.applyPattern_ = function(pattern) {
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this.pattern_ = pattern.replace(/ /g, '\u00a0');
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var pos = [0];
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this.positivePrefix_ = this.parseAffix_(pattern, pos);
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var trunkStart = pos[0];
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this.parseTrunk_(pattern, pos);
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var trunkLen = pos[0] - trunkStart;
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this.positiveSuffix_ = this.parseAffix_(pattern, pos);
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if (pos[0] < pattern.length &&
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pattern.charAt(pos[0]) == goog.i18n.NumberFormat.PATTERN_SEPARATOR_) {
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pos[0]++;
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this.negativePrefix_ = this.parseAffix_(pattern, pos);
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// we assume this part is identical to positive part.
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// user must make sure the pattern is correctly constructed.
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pos[0] += trunkLen;
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this.negativeSuffix_ = this.parseAffix_(pattern, pos);
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} else {
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// if no negative affix specified, they share the same positive affix
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this.negativePrefix_ = this.positivePrefix_ + this.negativePrefix_;
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this.negativeSuffix_ += this.positiveSuffix_;
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}
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};
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/**
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* Apply a predefined pattern to NumberFormat object.
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* @param {number} patternType The number that indicates a predefined number
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* format pattern.
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* @private
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*/
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goog.i18n.NumberFormat.prototype.applyStandardPattern_ = function(patternType) {
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switch (patternType) {
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case goog.i18n.NumberFormat.Format.DECIMAL:
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this.applyPattern_(goog.i18n.NumberFormatSymbols.DECIMAL_PATTERN);
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break;
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case goog.i18n.NumberFormat.Format.SCIENTIFIC:
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this.applyPattern_(goog.i18n.NumberFormatSymbols.SCIENTIFIC_PATTERN);
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break;
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case goog.i18n.NumberFormat.Format.PERCENT:
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this.applyPattern_(goog.i18n.NumberFormatSymbols.PERCENT_PATTERN);
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break;
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case goog.i18n.NumberFormat.Format.CURRENCY:
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this.applyPattern_(goog.i18n.currency.adjustPrecision(
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goog.i18n.NumberFormatSymbols.CURRENCY_PATTERN,
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this.intlCurrencyCode_));
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break;
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default:
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throw Error('Unsupported pattern type.');
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}
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};
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/**
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* Parses text string to produce a Number.
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*
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* This method attempts to parse text starting from position "opt_pos" if it
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* is given. Otherwise the parse will start from the beginning of the text.
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* When opt_pos presents, opt_pos will be updated to the character next to where
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* parsing stops after the call. If an error occurs, opt_pos won't be updated.
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*
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* @param {string} text The string to be parsed.
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* @param {Array.<number>=} opt_pos Position to pass in and get back.
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* @return {number} Parsed number. This throws an error if the text cannot be
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* parsed.
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*/
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goog.i18n.NumberFormat.prototype.parse = function(text, opt_pos) {
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var pos = opt_pos || [0];
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var start = pos[0];
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var ret = NaN;
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// we don't want to handle 2 kind of space in parsing, normalize it to nbsp
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text = text.replace(/ /g, '\u00a0');
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var gotPositive = text.indexOf(this.positivePrefix_, pos[0]) == pos[0];
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var gotNegative = text.indexOf(this.negativePrefix_, pos[0]) == pos[0];
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// check for the longest match
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if (gotPositive && gotNegative) {
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if (this.positivePrefix_.length > this.negativePrefix_.length) {
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gotNegative = false;
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} else if (this.positivePrefix_.length < this.negativePrefix_.length) {
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gotPositive = false;
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}
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}
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if (gotPositive) {
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pos[0] += this.positivePrefix_.length;
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} else if (gotNegative) {
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pos[0] += this.negativePrefix_.length;
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}
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// process digits or Inf, find decimal position
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if (text.indexOf(goog.i18n.NumberFormatSymbols.INFINITY, pos[0]) == pos[0]) {
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pos[0] += goog.i18n.NumberFormatSymbols.INFINITY.length;
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ret = Infinity;
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} else {
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ret = this.parseNumber_(text, pos);
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}
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// check for suffix
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if (gotPositive) {
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if (!(text.indexOf(this.positiveSuffix_, pos[0]) == pos[0])) {
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return NaN;
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}
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pos[0] += this.positiveSuffix_.length;
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} else if (gotNegative) {
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if (!(text.indexOf(this.negativeSuffix_, pos[0]) == pos[0])) {
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return NaN;
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}
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pos[0] += this.negativeSuffix_.length;
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}
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return gotNegative ? -ret : ret;
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};
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/**
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* This function will parse a "localized" text into a Number. It needs to
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* handle locale specific decimal, grouping, exponent and digits.
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*
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* @param {string} text The text that need to be parsed.
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* @param {Array.<number>} pos In/out parsing position. In case of failure,
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* pos value won't be changed.
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* @return {number} Number value, or NaN if nothing can be parsed.
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* @private
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*/
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goog.i18n.NumberFormat.prototype.parseNumber_ = function(text, pos) {
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var sawDecimal = false;
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var sawExponent = false;
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var sawDigit = false;
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var scale = 1;
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var decimal = goog.i18n.NumberFormatSymbols.DECIMAL_SEP;
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var grouping = goog.i18n.NumberFormatSymbols.GROUP_SEP;
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var exponentChar = goog.i18n.NumberFormatSymbols.EXP_SYMBOL;
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var normalizedText = '';
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for (; pos[0] < text.length; pos[0]++) {
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var ch = text.charAt(pos[0]);
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var digit = this.getDigit_(ch);
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if (digit >= 0 && digit <= 9) {
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normalizedText += digit;
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sawDigit = true;
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} else if (ch == decimal.charAt(0)) {
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if (sawDecimal || sawExponent) {
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break;
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}
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normalizedText += '.';
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sawDecimal = true;
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} else if (ch == grouping.charAt(0) &&
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('\u00a0' != grouping.charAt(0) ||
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pos[0] + 1 < text.length &&
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this.getDigit_(text.charAt(pos[0] + 1)) >= 0)) {
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// Got a grouping character here. When grouping character is nbsp, need
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// to make sure the character following it is a digit.
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if (sawDecimal || sawExponent) {
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break;
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}
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continue;
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} else if (ch == exponentChar.charAt(0)) {
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if (sawExponent) {
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break;
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}
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normalizedText += 'E';
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sawExponent = true;
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} else if (ch == '+' || ch == '-') {
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normalizedText += ch;
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} else if (ch == goog.i18n.NumberFormatSymbols.PERCENT.charAt(0)) {
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if (scale != 1) {
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break;
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}
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scale = 100;
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if (sawDigit) {
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pos[0]++; // eat this character if parse end here
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break;
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}
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} else if (ch == goog.i18n.NumberFormatSymbols.PERMILL.charAt(0)) {
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if (scale != 1) {
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break;
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}
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scale = 1000;
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if (sawDigit) {
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pos[0]++; // eat this character if parse end here
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break;
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}
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} else {
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break;
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}
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}
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return parseFloat(normalizedText) / scale;
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};
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/**
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* Formats a Number to produce a string.
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*
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* @param {number} number The Number to be formatted.
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* @return {string} The formatted number string.
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*/
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goog.i18n.NumberFormat.prototype.format = function(number) {
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if (isNaN(number)) {
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return goog.i18n.NumberFormatSymbols.NAN;
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}
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var parts = [];
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// in icu code, it is commented that certain computation need to keep the
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// negative sign for 0.
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var isNegative = number < 0.0 || number == 0.0 && 1 / number < 0.0;
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parts.push(isNegative ? this.negativePrefix_ : this.positivePrefix_);
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if (!isFinite(number)) {
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parts.push(goog.i18n.NumberFormatSymbols.INFINITY);
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} else {
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// convert number to non-negative value
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number *= isNegative ? -1 : 1;
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number *= this.multiplier_;
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this.useExponentialNotation_ ?
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this.subformatExponential_(number, parts) :
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this.subformatFixed_(number, this.minimumIntegerDigits_, parts);
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}
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parts.push(isNegative ? this.negativeSuffix_ : this.positiveSuffix_);
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return parts.join('');
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};
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/**
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* Formats a Number in fraction format.
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*
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* @param {number} number Value need to be formated.
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* @param {number} minIntDigits Minimum integer digits.
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* @param {Array} parts This array holds the pieces of formatted string.
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* This function will add its formatted pieces to the array.
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* @private
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*/
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goog.i18n.NumberFormat.prototype.subformatFixed_ =
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function(number, minIntDigits, parts) {
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// round the number
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var power = Math.pow(10, this.maximumFractionDigits_);
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var shiftedNumber = Math.round(number * power);
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var intValue, fracValue;
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if (isFinite(shiftedNumber)) {
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intValue = Math.floor(shiftedNumber / power);
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fracValue = Math.floor(shiftedNumber - intValue * power);
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} else {
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intValue = number;
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fracValue = 0;
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}
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var fractionPresent = this.minimumFractionDigits_ > 0 || fracValue > 0;
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var intPart = '';
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var translatableInt = intValue;
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while (translatableInt > 1E20) {
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// here it goes beyond double precision, add '0' make it look better
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intPart = '0' + intPart;
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translatableInt = Math.round(translatableInt / 10);
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}
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intPart = translatableInt + intPart;
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var decimal = goog.i18n.NumberFormatSymbols.DECIMAL_SEP;
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var grouping = goog.i18n.NumberFormatSymbols.GROUP_SEP;
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var zeroCode = goog.i18n.NumberFormat.enforceAsciiDigits_ ?
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48 /* ascii '0' */ :
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goog.i18n.NumberFormatSymbols.ZERO_DIGIT.charCodeAt(0);
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var digitLen = intPart.length;
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if (intValue > 0 || minIntDigits > 0) {
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for (var i = digitLen; i < minIntDigits; i++) {
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parts.push(String.fromCharCode(zeroCode));
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}
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for (var i = 0; i < digitLen; i++) {
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parts.push(String.fromCharCode(zeroCode + intPart.charAt(i) * 1));
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if (digitLen - i > 1 && this.groupingSize_ > 0 &&
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((digitLen - i) % this.groupingSize_ == 1)) {
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parts.push(grouping);
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}
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}
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} else if (!fractionPresent) {
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// If there is no fraction present, and we haven't printed any
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// integer digits, then print a zero.
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parts.push(String.fromCharCode(zeroCode));
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}
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// Output the decimal separator if we always do so.
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if (this.decimalSeparatorAlwaysShown_ || fractionPresent) {
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parts.push(decimal);
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}
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var fracPart = '' + (fracValue + power);
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var fracLen = fracPart.length;
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while (fracPart.charAt(fracLen - 1) == '0' &&
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fracLen > this.minimumFractionDigits_ + 1) {
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fracLen--;
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}
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for (var i = 1; i < fracLen; i++) {
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parts.push(String.fromCharCode(zeroCode + fracPart.charAt(i) * 1));
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}
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};
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/**
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* Formats exponent part of a Number.
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*
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* @param {number} exponent Exponential value.
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* @param {Array.<string>} parts The array that holds the pieces of formatted
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* string. This function will append more formatted pieces to the array.
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* @private
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*/
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goog.i18n.NumberFormat.prototype.addExponentPart_ = function(exponent, parts) {
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parts.push(goog.i18n.NumberFormatSymbols.EXP_SYMBOL);
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if (exponent < 0) {
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exponent = -exponent;
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parts.push(goog.i18n.NumberFormatSymbols.MINUS_SIGN);
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} else if (this.useSignForPositiveExponent_) {
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parts.push(goog.i18n.NumberFormatSymbols.PLUS_SIGN);
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}
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var exponentDigits = '' + exponent;
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var zeroChar = goog.i18n.NumberFormat.enforceAsciiDigits_ ? '0' :
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goog.i18n.NumberFormatSymbols.ZERO_DIGIT;
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for (var i = exponentDigits.length; i < this.minExponentDigits_; i++) {
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parts.push(zeroChar);
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}
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parts.push(exponentDigits);
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};
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/**
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* Formats Number in exponential format.
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*
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* @param {number} number Value need to be formated.
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* @param {Array.<string>} parts The array that holds the pieces of formatted
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* string. This function will append more formatted pieces to the array.
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* @private
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*/
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goog.i18n.NumberFormat.prototype.subformatExponential_ =
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function(number, parts) {
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if (number == 0.0) {
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this.subformatFixed_(number, this.minimumIntegerDigits_, parts);
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this.addExponentPart_(0, parts);
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return;
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}
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var exponent = Math.floor(Math.log(number) / Math.log(10));
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number /= Math.pow(10, exponent);
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|
var minIntDigits = this.minimumIntegerDigits_;
|
|
if (this.maximumIntegerDigits_ > 1 &&
|
|
this.maximumIntegerDigits_ > this.minimumIntegerDigits_) {
|
|
// A repeating range is defined; adjust to it as follows.
|
|
// If repeat == 3, we have 6,5,4=>3; 3,2,1=>0; 0,-1,-2=>-3;
|
|
// -3,-4,-5=>-6, etc. This takes into account that the
|
|
// exponent we have here is off by one from what we expect;
|
|
// it is for the format 0.MMMMMx10^n.
|
|
while ((exponent % this.maximumIntegerDigits_) != 0) {
|
|
number *= 10;
|
|
exponent--;
|
|
}
|
|
minIntDigits = 1;
|
|
} else {
|
|
// No repeating range is defined; use minimum integer digits.
|
|
if (this.minimumIntegerDigits_ < 1) {
|
|
exponent++;
|
|
number /= 10;
|
|
} else {
|
|
exponent -= this.minimumIntegerDigits_ - 1;
|
|
number *= Math.pow(10, this.minimumIntegerDigits_ - 1);
|
|
}
|
|
}
|
|
this.subformatFixed_(number, minIntDigits, parts);
|
|
this.addExponentPart_(exponent, parts);
|
|
};
|
|
|
|
|
|
/**
|
|
* Returns the digit value of current character. The character could be either
|
|
* '0' to '9', or a locale specific digit.
|
|
*
|
|
* @param {string} ch Character that represents a digit.
|
|
* @return {number} The digit value, or -1 on error.
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.prototype.getDigit_ = function(ch) {
|
|
var code = ch.charCodeAt(0);
|
|
// between '0' to '9'
|
|
if (48 <= code && code < 58) {
|
|
return code - 48;
|
|
} else {
|
|
var zeroCode = goog.i18n.NumberFormatSymbols.ZERO_DIGIT.charCodeAt(0);
|
|
return zeroCode <= code && code < zeroCode + 10 ? code - zeroCode : -1;
|
|
}
|
|
};
|
|
|
|
|
|
// ----------------------------------------------------------------------
|
|
// CONSTANTS
|
|
// ----------------------------------------------------------------------
|
|
// Constants for characters used in programmatic (unlocalized) patterns.
|
|
/**
|
|
* A zero digit character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_ZERO_DIGIT_ = '0';
|
|
|
|
|
|
/**
|
|
* A grouping separator character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_GROUPING_SEPARATOR_ = ',';
|
|
|
|
|
|
/**
|
|
* A decimal separator character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_DECIMAL_SEPARATOR_ = '.';
|
|
|
|
|
|
/**
|
|
* A per mille character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_PER_MILLE_ = '\u2030';
|
|
|
|
|
|
/**
|
|
* A percent character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_PERCENT_ = '%';
|
|
|
|
|
|
/**
|
|
* A digit character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_DIGIT_ = '#';
|
|
|
|
|
|
/**
|
|
* A separator character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_SEPARATOR_ = ';';
|
|
|
|
|
|
/**
|
|
* An exponent character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_EXPONENT_ = 'E';
|
|
|
|
|
|
/**
|
|
* An plus character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_PLUS_ = '+';
|
|
|
|
|
|
/**
|
|
* A minus character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_MINUS_ = '-';
|
|
|
|
|
|
/**
|
|
* A quote character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.PATTERN_CURRENCY_SIGN_ = '\u00A4';
|
|
|
|
|
|
/**
|
|
* A quote character.
|
|
* @type {string}
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.QUOTE_ = '\'';
|
|
|
|
|
|
/**
|
|
* Parses affix part of pattern.
|
|
*
|
|
* @param {string} pattern Pattern string that need to be parsed.
|
|
* @param {Array.<number>} pos One element position array to set and receive
|
|
* parsing position.
|
|
*
|
|
* @return {string} Affix received from parsing.
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.prototype.parseAffix_ = function(pattern, pos) {
|
|
var affix = '';
|
|
var inQuote = false;
|
|
var len = pattern.length;
|
|
|
|
for (; pos[0] < len; pos[0]++) {
|
|
var ch = pattern.charAt(pos[0]);
|
|
if (ch == goog.i18n.NumberFormat.QUOTE_) {
|
|
if (pos[0] + 1 < len &&
|
|
pattern.charAt(pos[0] + 1) == goog.i18n.NumberFormat.QUOTE_) {
|
|
pos[0]++;
|
|
affix += '\''; // 'don''t'
|
|
} else {
|
|
inQuote = !inQuote;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (inQuote) {
|
|
affix += ch;
|
|
} else {
|
|
switch (ch) {
|
|
case goog.i18n.NumberFormat.PATTERN_DIGIT_:
|
|
case goog.i18n.NumberFormat.PATTERN_ZERO_DIGIT_:
|
|
case goog.i18n.NumberFormat.PATTERN_GROUPING_SEPARATOR_:
|
|
case goog.i18n.NumberFormat.PATTERN_DECIMAL_SEPARATOR_:
|
|
case goog.i18n.NumberFormat.PATTERN_SEPARATOR_:
|
|
return affix;
|
|
case goog.i18n.NumberFormat.PATTERN_CURRENCY_SIGN_:
|
|
if ((pos[0] + 1) < len &&
|
|
pattern.charAt(pos[0] + 1) ==
|
|
goog.i18n.NumberFormat.PATTERN_CURRENCY_SIGN_) {
|
|
pos[0]++;
|
|
affix += this.intlCurrencyCode_;
|
|
} else {
|
|
switch (this.currencyStyle_) {
|
|
case goog.i18n.NumberFormat.CurrencyStyle.LOCAL:
|
|
affix += goog.i18n.currency.getLocalCurrencySign(
|
|
this.intlCurrencyCode_);
|
|
break;
|
|
case goog.i18n.NumberFormat.CurrencyStyle.GLOBAL:
|
|
affix += goog.i18n.currency.getGlobalCurrencySign(
|
|
this.intlCurrencyCode_);
|
|
break;
|
|
case goog.i18n.NumberFormat.CurrencyStyle.PORTABLE:
|
|
affix += goog.i18n.currency.getPortableCurrencySign(
|
|
this.intlCurrencyCode_);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case goog.i18n.NumberFormat.PATTERN_PERCENT_:
|
|
if (this.multiplier_ != 1) {
|
|
throw Error('Too many percent/permill');
|
|
}
|
|
this.multiplier_ = 100;
|
|
affix += goog.i18n.NumberFormatSymbols.PERCENT;
|
|
break;
|
|
case goog.i18n.NumberFormat.PATTERN_PER_MILLE_:
|
|
if (this.multiplier_ != 1) {
|
|
throw Error('Too many percent/permill');
|
|
}
|
|
this.multiplier_ = 1000;
|
|
affix += goog.i18n.NumberFormatSymbols.PERMILL;
|
|
break;
|
|
default:
|
|
affix += ch;
|
|
}
|
|
}
|
|
}
|
|
|
|
return affix;
|
|
};
|
|
|
|
|
|
/**
|
|
* Parses the trunk part of a pattern.
|
|
*
|
|
* @param {string} pattern Pattern string that need to be parsed.
|
|
* @param {Array.<number>} pos One element position array to set and receive
|
|
* parsing position.
|
|
* @private
|
|
*/
|
|
goog.i18n.NumberFormat.prototype.parseTrunk_ = function(pattern, pos) {
|
|
var decimalPos = -1;
|
|
var digitLeftCount = 0;
|
|
var zeroDigitCount = 0;
|
|
var digitRightCount = 0;
|
|
var groupingCount = -1;
|
|
|
|
var len = pattern.length;
|
|
for (var loop = true; pos[0] < len && loop; pos[0]++) {
|
|
var ch = pattern.charAt(pos[0]);
|
|
switch (ch) {
|
|
case goog.i18n.NumberFormat.PATTERN_DIGIT_:
|
|
if (zeroDigitCount > 0) {
|
|
digitRightCount++;
|
|
} else {
|
|
digitLeftCount++;
|
|
}
|
|
if (groupingCount >= 0 && decimalPos < 0) {
|
|
groupingCount++;
|
|
}
|
|
break;
|
|
case goog.i18n.NumberFormat.PATTERN_ZERO_DIGIT_:
|
|
if (digitRightCount > 0) {
|
|
throw Error('Unexpected "0" in pattern "' + pattern + '"');
|
|
}
|
|
zeroDigitCount++;
|
|
if (groupingCount >= 0 && decimalPos < 0) {
|
|
groupingCount++;
|
|
}
|
|
break;
|
|
case goog.i18n.NumberFormat.PATTERN_GROUPING_SEPARATOR_:
|
|
groupingCount = 0;
|
|
break;
|
|
case goog.i18n.NumberFormat.PATTERN_DECIMAL_SEPARATOR_:
|
|
if (decimalPos >= 0) {
|
|
throw Error('Multiple decimal separators in pattern "' +
|
|
pattern + '"');
|
|
}
|
|
decimalPos = digitLeftCount + zeroDigitCount + digitRightCount;
|
|
break;
|
|
case goog.i18n.NumberFormat.PATTERN_EXPONENT_:
|
|
if (this.useExponentialNotation_) {
|
|
throw Error('Multiple exponential symbols in pattern "' +
|
|
pattern + '"');
|
|
}
|
|
this.useExponentialNotation_ = true;
|
|
this.minExponentDigits_ = 0;
|
|
|
|
// exponent pattern can have a optional '+'.
|
|
if ((pos[0] + 1) < len && pattern.charAt(pos[0] + 1) ==
|
|
goog.i18n.NumberFormat.PATTERN_PLUS_) {
|
|
pos[0]++;
|
|
this.useSignForPositiveExponent_ = true;
|
|
}
|
|
|
|
// Use lookahead to parse out the exponential part
|
|
// of the pattern, then jump into phase 2.
|
|
while ((pos[0] + 1) < len && pattern.charAt(pos[0] + 1) ==
|
|
goog.i18n.NumberFormat.PATTERN_ZERO_DIGIT_) {
|
|
pos[0]++;
|
|
this.minExponentDigits_++;
|
|
}
|
|
|
|
if ((digitLeftCount + zeroDigitCount) < 1 ||
|
|
this.minExponentDigits_ < 1) {
|
|
throw Error('Malformed exponential pattern "' + pattern + '"');
|
|
}
|
|
loop = false;
|
|
break;
|
|
default:
|
|
pos[0]--;
|
|
loop = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (zeroDigitCount == 0 && digitLeftCount > 0 && decimalPos >= 0) {
|
|
// Handle '###.###' and '###.' and '.###'
|
|
var n = decimalPos;
|
|
if (n == 0) { // Handle '.###'
|
|
n++;
|
|
}
|
|
digitRightCount = digitLeftCount - n;
|
|
digitLeftCount = n - 1;
|
|
zeroDigitCount = 1;
|
|
}
|
|
|
|
// Do syntax checking on the digits.
|
|
if (decimalPos < 0 && digitRightCount > 0 ||
|
|
decimalPos >= 0 && (decimalPos < digitLeftCount ||
|
|
decimalPos > digitLeftCount + zeroDigitCount) ||
|
|
groupingCount == 0) {
|
|
throw Error('Malformed pattern "' + pattern + '"');
|
|
}
|
|
var totalDigits = digitLeftCount + zeroDigitCount + digitRightCount;
|
|
|
|
this.maximumFractionDigits_ = decimalPos >= 0 ? totalDigits - decimalPos : 0;
|
|
if (decimalPos >= 0) {
|
|
this.minimumFractionDigits_ = digitLeftCount + zeroDigitCount - decimalPos;
|
|
if (this.minimumFractionDigits_ < 0) {
|
|
this.minimumFractionDigits_ = 0;
|
|
}
|
|
}
|
|
|
|
// The effectiveDecimalPos is the position the decimal is at or would be at
|
|
// if there is no decimal. Note that if decimalPos<0, then digitTotalCount ==
|
|
// digitLeftCount + zeroDigitCount.
|
|
var effectiveDecimalPos = decimalPos >= 0 ? decimalPos : totalDigits;
|
|
this.minimumIntegerDigits_ = effectiveDecimalPos - digitLeftCount;
|
|
if (this.useExponentialNotation_) {
|
|
this.maximumIntegerDigits_ = digitLeftCount + this.minimumIntegerDigits_;
|
|
|
|
// in exponential display, we need to at least show something.
|
|
if (this.maximumFractionDigits_ == 0 && this.minimumIntegerDigits_ == 0) {
|
|
this.minimumIntegerDigits_ = 1;
|
|
}
|
|
}
|
|
|
|
this.groupingSize_ = Math.max(0, groupingCount);
|
|
this.decimalSeparatorAlwaysShown_ = decimalPos == 0 ||
|
|
decimalPos == totalDigits;
|
|
};
|