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// Copyright 2006 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Number format/parse library with locale support.
*/
/**
* Namespace for locale number format functions
*/
goog.provide('goog.i18n.NumberFormat');
goog.provide('goog.i18n.NumberFormat.CurrencyStyle');
goog.provide('goog.i18n.NumberFormat.Format');
goog.require('goog.asserts');
goog.require('goog.i18n.CompactNumberFormatSymbols');
goog.require('goog.i18n.NumberFormatSymbols');
goog.require('goog.i18n.NumberFormatSymbols_u_nu_latn');
goog.require('goog.i18n.currency');
goog.require('goog.math');
goog.require('goog.string');
/**
* Constructor of NumberFormat.
* @param {number|string} pattern The number that indicates a predefined
* number format pattern.
* @param {string=} opt_currency Optional international currency
* code. This determines the currency code/symbol used in format/parse. If
* not given, the currency code for the current locale will be used.
* @param {number=} opt_currencyStyle currency style, value defined in
* goog.i18n.NumberFormat.CurrencyStyle. If not given, the currency style
* for the current locale will be used.
* @param {!Object<string, string>=} opt_symbols Optional number format symbols
* map, analogous to goog.i18n.NumberFormatSymbols. If present, this
* overrides the symbols from the current locale, such as the percent sign
* and minus sign.
* @constructor
*/
goog.i18n.NumberFormat = function(
pattern, opt_currency, opt_currencyStyle, opt_symbols) {
/** @const @private {?string} */
this.intlCurrencyCode_ = opt_currency || null;
/** @const @private {number} */
this.currencyStyle_ =
opt_currencyStyle || goog.i18n.NumberFormat.CurrencyStyle.LOCAL;
/** @const @private {?Object<string, string>} */
this.overrideNumberFormatSymbols_ = opt_symbols || null;
/** @private {number} */
this.maximumIntegerDigits_ = 40;
/** @private {number} */
this.minimumIntegerDigits_ = 1;
/** @private {number} */
this.significantDigits_ = 0; // invariant, <= maximumFractionDigits
/** @private {number} */
this.maximumFractionDigits_ = 3; // invariant, >= minFractionDigits
/** @private {number} */
this.minimumFractionDigits_ = 0;
/** @private {number} */
this.minExponentDigits_ = 0;
/** @private {boolean} */
this.useSignForPositiveExponent_ = false;
/**
* Whether to show trailing zeros in the fraction when significantDigits_ is
* positive.
* @private {boolean}
*/
this.showTrailingZeros_ = false;
/** @private {string} */
this.positivePrefix_ = '';
/** @private {string} */
this.positiveSuffix_ = '';
/** @private {string} */
this.negativePrefix_ = this.getNumberFormatSymbols_().MINUS_SIGN;
/** @private {string} */
this.negativeSuffix_ = '';
// The multiplier for use in percent, per mille, etc.
/** @private {number} */
this.multiplier_ = 1;
/**
* True if the percent/permill sign of the negative pattern is expected.
* @private {boolean}
*/
this.negativePercentSignExpected_ = false;
/**
* The grouping array is used to store the values of each number group
* following left of the decimal place. For example, a number group with
* goog.i18n.NumberFormat('#,##,###') should have [3,2] where 2 is the
* repeated number group following a fixed number grouping of size 3.
* @private {!Array<number>}
*/
this.groupingArray_ = [];
/** @private {boolean} */
this.decimalSeparatorAlwaysShown_ = false;
/** @private {boolean} */
this.useExponentialNotation_ = false;
/** @private {goog.i18n.NumberFormat.CompactStyle} */
this.compactStyle_ = goog.i18n.NumberFormat.CompactStyle.NONE;
/**
* The number to base the formatting on when using compact styles, or null
* if formatting should not be based on another number.
* @type {?number}
* @private
*/
this.baseFormattingNumber_ = null;
/** @private {string} */
this.pattern_;
if (typeof pattern == 'number') {
this.applyStandardPattern_(pattern);
} else {
this.applyPattern_(pattern);
}
};
/**
* Standard number formatting patterns.
* @enum {number}
*/
goog.i18n.NumberFormat.Format = {
DECIMAL: 1,
SCIENTIFIC: 2,
PERCENT: 3,
CURRENCY: 4,
COMPACT_SHORT: 5,
COMPACT_LONG: 6
};
/**
* Currency styles.
* @enum {number}
*/
goog.i18n.NumberFormat.CurrencyStyle = {
LOCAL: 0, // currency style as it is used in its circulating country.
PORTABLE: 1, // currency style that differentiate it from other popular ones.
GLOBAL: 2 // currency style that is unique among all currencies.
};
/**
* Compacting styles.
* @enum {number}
*/
goog.i18n.NumberFormat.CompactStyle = {
NONE: 0, // Don't compact.
SHORT: 1, // Short compact form, such as 1.2B.
LONG: 2 // Long compact form, such as 1.2 billion.
};
/**
* If the usage of Ascii digits should be enforced.
* @type {boolean}
* @private
*/
goog.i18n.NumberFormat.enforceAsciiDigits_ = false;
/**
* Set if the usage of Ascii digits in formatting should be enforced.
* NOTE: This function must be called before constructing NumberFormat.
*
* @param {boolean} doEnforce Boolean value about if Ascii digits should be
* enforced.
*/
goog.i18n.NumberFormat.setEnforceAsciiDigits = function(doEnforce) {
goog.i18n.NumberFormat.enforceAsciiDigits_ = doEnforce;
};
/**
* Return if Ascii digits is enforced.
* @return {boolean} If Ascii digits is enforced.
*/
goog.i18n.NumberFormat.isEnforceAsciiDigits = function() {
return goog.i18n.NumberFormat.enforceAsciiDigits_;
};
/**
* Returns the current NumberFormatSymbols.
* @return {!Object}
* @private
*/
goog.i18n.NumberFormat.prototype.getNumberFormatSymbols_ = function() {
return this.overrideNumberFormatSymbols_ ||
(goog.i18n.NumberFormat.enforceAsciiDigits_ ?
goog.i18n.NumberFormatSymbols_u_nu_latn :
goog.i18n.NumberFormatSymbols);
};
/**
* Returns the currency code.
* @return {string}
* @private
*/
goog.i18n.NumberFormat.prototype.getCurrencyCode_ = function() {
return this.intlCurrencyCode_ ||
this.getNumberFormatSymbols_().DEF_CURRENCY_CODE;
};
/**
* Sets minimum number of fraction digits.
* @param {number} min the minimum.
* @return {!goog.i18n.NumberFormat} Reference to this NumberFormat object.
*/
goog.i18n.NumberFormat.prototype.setMinimumFractionDigits = function(min) {
if (this.significantDigits_ > 0 && min > 0) {
throw new Error(
'Can\'t combine significant digits and minimum fraction digits');
}
this.minimumFractionDigits_ = min;
return this;
};
/**
* Gets minimum number of fraction digits.
* @return {number} The number of minimum fraction digits.
*/
goog.i18n.NumberFormat.prototype.getMinimumFractionDigits = function() {
return this.minimumFractionDigits_;
};
/**
* Sets maximum number of fraction digits.
* @param {number} max the maximum.
* @return {!goog.i18n.NumberFormat} Reference to this NumberFormat object.
*/
goog.i18n.NumberFormat.prototype.setMaximumFractionDigits = function(max) {
if (max > 308) {
// Math.pow(10, 309) becomes Infinity which breaks the logic in this class.
throw new Error('Unsupported maximum fraction digits: ' + max);
}
this.maximumFractionDigits_ = max;
return this;
};
/**
* Gets maximum number of fraction digits.
* @return {number} The number of maximum fraction digits.
*/
goog.i18n.NumberFormat.prototype.getMaximumFractionDigits = function() {
return this.maximumFractionDigits_;
};
/**
* Sets number of significant digits to show. Only fractions will be rounded.
* Regardless of the number of significant digits set, the number of fractional
* digits shown will always be capped by the maximum number of fractional digits
* set on {@link #setMaximumFractionDigits}.
* @param {number} number The number of significant digits to include.
* @return {!goog.i18n.NumberFormat} Reference to this NumberFormat object.
*/
goog.i18n.NumberFormat.prototype.setSignificantDigits = function(number) {
if (this.minimumFractionDigits_ > 0 && number >= 0) {
throw new Error(
'Can\'t combine significant digits and minimum fraction digits');
}
this.significantDigits_ = number;
return this;
};
/**
* Gets number of significant digits to show. Only fractions will be rounded.
* @return {number} The number of significant digits to include.
*/
goog.i18n.NumberFormat.prototype.getSignificantDigits = function() {
return this.significantDigits_;
};
/**
* Sets whether trailing fraction zeros should be shown when significantDigits_
* is positive. If this is true and significantDigits_ is 2, 1 will be formatted
* as '1.0'.
* @param {boolean} showTrailingZeros Whether trailing zeros should be shown.
* @return {!goog.i18n.NumberFormat} Reference to this NumberFormat object.
*/
goog.i18n.NumberFormat.prototype.setShowTrailingZeros = function(
showTrailingZeros) {
this.showTrailingZeros_ = showTrailingZeros;
return this;
};
/**
* Sets a number to base the formatting on when compact style formatting is
* used. If this is null, the formatting should be based only on the number to
* be formatting.
*
* This base formatting number can be used to format the target number as
* another number would be formatted. For example, 100,000 is normally formatted
* as "100K" in the COMPACT_SHORT format. To instead format it as '0.1M', the
* base number could be set to 1,000,000 in order to force all numbers to be
* formatted in millions. Similarly, 1,000,000,000 would normally be formatted
* as '1B' and setting the base formatting number to 1,000,000, would cause it
* to be formatted instead as '1,000M'.
*
* @param {?number} baseFormattingNumber The number to base formatting on, or
* null if formatting should not be based on another number.
* @return {!goog.i18n.NumberFormat} Reference to this NumberFormat object.
*/
goog.i18n.NumberFormat.prototype.setBaseFormatting = function(
baseFormattingNumber) {
goog.asserts.assert(
goog.isNull(baseFormattingNumber) || isFinite(baseFormattingNumber));
this.baseFormattingNumber_ = baseFormattingNumber;
return this;
};
/**
* Gets the number on which compact formatting is currently based, or null if
* no such number is set. See setBaseFormatting() for more information.
* @return {?number}
*/
goog.i18n.NumberFormat.prototype.getBaseFormatting = function() {
return this.baseFormattingNumber_;
};
/**
* Apply provided pattern, result are stored in member variables.
*
* @param {string} pattern String pattern being applied.
* @private
*/
goog.i18n.NumberFormat.prototype.applyPattern_ = function(pattern) {
this.pattern_ = pattern.replace(/ /g, '\u00a0');
var pos = [0];
this.positivePrefix_ = this.parseAffix_(pattern, pos);
var trunkStart = pos[0];
this.parseTrunk_(pattern, pos);
var trunkLen = pos[0] - trunkStart;
this.positiveSuffix_ = this.parseAffix_(pattern, pos);
if (pos[0] < pattern.length &&
pattern.charAt(pos[0]) == goog.i18n.NumberFormat.PATTERN_SEPARATOR_) {
pos[0]++;
if (this.multiplier_ != 1) this.negativePercentSignExpected_ = true;
this.negativePrefix_ = this.parseAffix_(pattern, pos);
// we assume this part is identical to positive part.
// user must make sure the pattern is correctly constructed.
pos[0] += trunkLen;
this.negativeSuffix_ = this.parseAffix_(pattern, pos);
} else {
// if no negative affix specified, they share the same positive affix
this.negativePrefix_ += this.positivePrefix_;
this.negativeSuffix_ += this.positiveSuffix_;
}
};
/**
* Apply a predefined pattern to NumberFormat object.
* @param {number} patternType The number that indicates a predefined number
* format pattern.
* @private
*/
goog.i18n.NumberFormat.prototype.applyStandardPattern_ = function(patternType) {
switch (patternType) {
case goog.i18n.NumberFormat.Format.DECIMAL:
this.applyPattern_(this.getNumberFormatSymbols_().DECIMAL_PATTERN);
break;
case goog.i18n.NumberFormat.Format.SCIENTIFIC:
this.applyPattern_(this.getNumberFormatSymbols_().SCIENTIFIC_PATTERN);
break;
case goog.i18n.NumberFormat.Format.PERCENT:
this.applyPattern_(this.getNumberFormatSymbols_().PERCENT_PATTERN);
break;
case goog.i18n.NumberFormat.Format.CURRENCY:
this.applyPattern_(goog.i18n.currency.adjustPrecision(
this.getNumberFormatSymbols_().CURRENCY_PATTERN,
this.getCurrencyCode_()));
break;
case goog.i18n.NumberFormat.Format.COMPACT_SHORT:
this.applyCompactStyle_(goog.i18n.NumberFormat.CompactStyle.SHORT);
break;
case goog.i18n.NumberFormat.Format.COMPACT_LONG:
this.applyCompactStyle_(goog.i18n.NumberFormat.CompactStyle.LONG);
break;
default:
throw new Error('Unsupported pattern type.');
}
};
/**
* Apply a predefined pattern for shorthand formats.
* @param {goog.i18n.NumberFormat.CompactStyle} style the compact style to
* set defaults for.
* @private
*/
goog.i18n.NumberFormat.prototype.applyCompactStyle_ = function(style) {
this.compactStyle_ = style;
this.applyPattern_(this.getNumberFormatSymbols_().DECIMAL_PATTERN);
this.setMinimumFractionDigits(0);
this.setMaximumFractionDigits(2);
this.setSignificantDigits(2);
};
/**
* Parses text string to produce a Number.
*
* This method attempts to parse text starting from position "opt_pos" if it
* is given. Otherwise the parse will start from the beginning of the text.
* When opt_pos presents, opt_pos will be updated to the character next to where
* parsing stops after the call. If an error occurs, opt_pos won't be updated.
*
* @param {string} text The string to be parsed.
* @param {Array<number>=} opt_pos Position to pass in and get back.
* @return {number} Parsed number. This throws an error if the text cannot be
* parsed.
*/
goog.i18n.NumberFormat.prototype.parse = function(text, opt_pos) {
var pos = opt_pos || [0];
if (this.compactStyle_ != goog.i18n.NumberFormat.CompactStyle.NONE) {
throw new Error('Parsing of compact numbers is unimplemented');
}
var ret = NaN;
// We don't want to handle multiple kinds of space in parsing, normalize the
// regular and narrow nbsp to nbsp.
text = text.replace(/ |\u202f/g, '\u00a0');
var gotPositive = text.indexOf(this.positivePrefix_, pos[0]) == pos[0];
var gotNegative = text.indexOf(this.negativePrefix_, pos[0]) == pos[0];
// check for the longest match
if (gotPositive && gotNegative) {
if (this.positivePrefix_.length > this.negativePrefix_.length) {
gotNegative = false;
} else if (this.positivePrefix_.length < this.negativePrefix_.length) {
gotPositive = false;
}
}
if (gotPositive) {
pos[0] += this.positivePrefix_.length;
} else if (gotNegative) {
pos[0] += this.negativePrefix_.length;
}
// process digits or Inf, find decimal position
if (text.indexOf(this.getNumberFormatSymbols_().INFINITY, pos[0]) == pos[0]) {
pos[0] += this.getNumberFormatSymbols_().INFINITY.length;
ret = Infinity;
} else {
ret = this.parseNumber_(text, pos);
}
// check for suffix
if (gotPositive) {
if (!(text.indexOf(this.positiveSuffix_, pos[0]) == pos[0])) {
return NaN;
}
pos[0] += this.positiveSuffix_.length;
} else if (gotNegative) {
if (!(text.indexOf(this.negativeSuffix_, pos[0]) == pos[0])) {
return NaN;
}
pos[0] += this.negativeSuffix_.length;
}
return gotNegative ? -ret : ret;
};
/**
* This function will parse a "localized" text into a Number. It needs to
* handle locale specific decimal, grouping, exponent and digits.
*
* @param {string} text The text that need to be parsed.
* @param {Array<number>} pos In/out parsing position. In case of failure,
* pos value won't be changed.
* @return {number} Number value, or NaN if nothing can be parsed.
* @private
*/
goog.i18n.NumberFormat.prototype.parseNumber_ = function(text, pos) {
var sawDecimal = false;
var sawExponent = false;
var sawDigit = false;
var exponentPos = -1;
var scale = 1;
var decimal = this.getNumberFormatSymbols_().DECIMAL_SEP;
var grouping = this.getNumberFormatSymbols_().GROUP_SEP;
var exponentChar = this.getNumberFormatSymbols_().EXP_SYMBOL;
if (this.compactStyle_ != goog.i18n.NumberFormat.CompactStyle.NONE) {
throw new Error('Parsing of compact style numbers is not implemented');
}
// We don't want to handle multiple kinds of space in parsing, normalize the
// narrow nbsp to nbsp.
grouping = grouping.replace(/\u202f/g, '\u00a0');
var normalizedText = '';
for (; pos[0] < text.length; pos[0]++) {
var ch = text.charAt(pos[0]);
var digit = this.getDigit_(ch);
if (digit >= 0 && digit <= 9) {
normalizedText += digit;
sawDigit = true;
} else if (ch == decimal.charAt(0)) {
if (sawDecimal || sawExponent) {
break;
}
normalizedText += '.';
sawDecimal = true;
} else if (
ch == grouping.charAt(0) &&
('\u00a0' != grouping.charAt(0) ||
pos[0] + 1 < text.length &&
this.getDigit_(text.charAt(pos[0] + 1)) >= 0)) {
// Got a grouping character here. When grouping character is nbsp, need
// to make sure the character following it is a digit.
if (sawDecimal || sawExponent) {
break;
}
continue;
} else if (ch == exponentChar.charAt(0)) {
if (sawExponent) {
break;
}
normalizedText += 'E';
sawExponent = true;
exponentPos = pos[0];
} else if (ch == '+' || ch == '-') {
// Stop parsing if a '+' or '-' sign is found after digits have been found
// but it's not located right after an exponent sign.
if (sawDigit && exponentPos != pos[0] - 1) {
break;
}
normalizedText += ch;
} else if (
this.multiplier_ == 1 &&
ch == this.getNumberFormatSymbols_().PERCENT.charAt(0)) {
// Parse the percent character as part of the number only when it's
// not already included in the pattern.
if (scale != 1) {
break;
}
scale = 100;
if (sawDigit) {
pos[0]++; // eat this character if parse end here
break;
}
} else if (
this.multiplier_ == 1 &&
ch == this.getNumberFormatSymbols_().PERMILL.charAt(0)) {
// Parse the permill character as part of the number only when it's
// not already included in the pattern.
if (scale != 1) {
break;
}
scale = 1000;
if (sawDigit) {
pos[0]++; // eat this character if parse end here
break;
}
} else {
break;
}
}
// Scale the number when the percent/permill character was included in
// the pattern.
if (this.multiplier_ != 1) {
scale = this.multiplier_;
}
return parseFloat(normalizedText) / scale;
};
/**
* Formats a Number to produce a string.
*
* @param {number} number The Number to be formatted.
* @return {string} The formatted number string.
*/
goog.i18n.NumberFormat.prototype.format = function(number) {
if (isNaN(number)) {
return this.getNumberFormatSymbols_().NAN;
}
var parts = [];
var baseFormattingNumber = goog.isNull(this.baseFormattingNumber_) ?
number :
this.baseFormattingNumber_;
var unit = this.getUnitAfterRounding_(baseFormattingNumber, number);
number = goog.i18n.NumberFormat.decimalShift_(number, -unit.divisorBase);
parts.push(unit.prefix);
// in icu code, it is commented that certain computation need to keep the
// negative sign for 0.
var isNegative = number < 0.0 || number == 0.0 && 1 / number < 0.0;
parts.push(isNegative ? this.negativePrefix_ : this.positivePrefix_);
if (!isFinite(number)) {
parts.push(this.getNumberFormatSymbols_().INFINITY);
} else {
// convert number to non-negative value
number *= isNegative ? -1 : 1;
number *= this.multiplier_;
this.useExponentialNotation_ ?
this.subformatExponential_(number, parts) :
this.subformatFixed_(number, this.minimumIntegerDigits_, parts);
}
parts.push(isNegative ? this.negativeSuffix_ : this.positiveSuffix_);
parts.push(unit.suffix);
return parts.join('');
};
/**
* Round a number into an integer and fractional part
* based on the rounding rules for this NumberFormat.
* @param {number} number The number to round.
* @return {{intValue: number, fracValue: number}} The integer and fractional
* part after rounding.
* @private
*/
goog.i18n.NumberFormat.prototype.roundNumber_ = function(number) {
var shift = goog.i18n.NumberFormat.decimalShift_;
var shiftedNumber = shift(number, this.maximumFractionDigits_);
if (this.significantDigits_ > 0) {
shiftedNumber = this.roundToSignificantDigits_(
shiftedNumber, this.significantDigits_, this.maximumFractionDigits_);
}
shiftedNumber = Math.round(shiftedNumber);
var intValue, fracValue;
if (isFinite(shiftedNumber)) {
intValue = Math.floor(shift(shiftedNumber, -this.maximumFractionDigits_));
fracValue = Math.floor(
shiftedNumber - shift(intValue, this.maximumFractionDigits_));
} else {
intValue = number;
fracValue = 0;
}
return {intValue: intValue, fracValue: fracValue};
};
/**
* Formats a number with the appropriate groupings when there are repeating
* digits present. Repeating digits exists when the length of the digits left
* of the decimal place exceeds the number of non-repeating digits.
*
* Formats a number by iterating through the integer number (intPart) from the
* most left of the decimal place by inserting the appropriate number grouping
* separator for the repeating digits until all of the repeating digits is
* iterated. Then iterate through the non-repeating digits by inserting the
* appropriate number grouping separator until all the non-repeating digits
* is iterated through.
*
* In the number grouping concept, anything left of the decimal
* place is followed by non-repeating digits and then repeating digits. If the
* pattern is #,##,###, then we first (from the left of the decimal place) have
* a non-repeating digit of size 3 followed by repeating digits of size 2
* separated by a thousand separator. If the length of the digits are six or
* more, there may be repeating digits required. For example, the value of
* 12345678 would format as 1,23,45,678 where the repeating digit is length 2.
*
* @param {!Array<string>} parts An array to build the 'parts' of the formatted
* number including the values and separators.
* @param {number} zeroCode The value of the zero digit whether or not
* goog.i18n.NumberFormat.enforceAsciiDigits_ is enforced.
* @param {string} intPart The integer representation of the number to be
* formatted and referenced.
* @param {!Array<number>} groupingArray The array of numbers to determine the
* grouping of repeated and non-repeated digits.
* @param {number} repeatedDigitLen The length of the repeated digits left of
* the non-repeating digits left of the decimal.
* @return {!Array<string>} Returns the resulting parts variable containing
* how numbers are to be grouped and appear.
* @private
*/
goog.i18n.NumberFormat.prototype.formatNumberGroupingRepeatingDigitsParts_ =
function(parts, zeroCode, intPart, groupingArray, repeatedDigitLen) {
// Keep track of how much has been completed on the non repeated groups
var nonRepeatedGroupCompleteCount = 0;
var currentGroupSizeIndex = 0;
var currentGroupSize = 0;
var grouping = this.getNumberFormatSymbols_().GROUP_SEP;
var digitLen = intPart.length;
// There are repeating digits and non-repeating digits
for (var i = 0; i < digitLen; i++) {
parts.push(String.fromCharCode(zeroCode + Number(intPart.charAt(i)) * 1));
if (digitLen - i > 1) {
currentGroupSize = groupingArray[currentGroupSizeIndex];
if (i < repeatedDigitLen) {
// Process the left side (the repeated number groups)
var repeatedDigitIndex = repeatedDigitLen - i;
// Edge case if there's a number grouping asking for "1" group at
// a time; otherwise, if the remainder is 1, there's the separator
if (currentGroupSize === 1 ||
(currentGroupSize > 0 &&
(repeatedDigitIndex % currentGroupSize) === 1)) {
parts.push(grouping);
}
} else if (currentGroupSizeIndex < groupingArray.length) {
// Process the right side (the non-repeated fixed number groups)
if (i === repeatedDigitLen) {
// Increase the group index because a separator
// has previously added in the earlier logic
currentGroupSizeIndex += 1;
} else if (
currentGroupSize ===
i - repeatedDigitLen - nonRepeatedGroupCompleteCount + 1) {
// Otherwise, just iterate to the right side and
// add a separator once the length matches to the expected
parts.push(grouping);
// Keep track of what has been completed on the right
nonRepeatedGroupCompleteCount += currentGroupSize;
currentGroupSizeIndex += 1; // Get to the next number grouping
}
}
}
}
return parts;
};
/**
* Formats a number with the appropriate groupings when there are no repeating
* digits present. Non-repeating digits exists when the length of the digits
* left of the decimal place is equal or lesser than the length of
* non-repeating digits.
*
* Formats a number by iterating through the integer number (intPart) from the
* right most non-repeating number group of the decimal place. For each group,
* inserting the appropriate number grouping separator for the non-repeating
* digits until the number is completely iterated.
*
* In the number grouping concept, anything left of the decimal
* place is followed by non-repeating digits and then repeating digits. If the
* pattern is #,##,###, then we first (from the left of the decimal place) have
* a non-repeating digit of size 3 followed by repeating digits of size 2
* separated by a thousand separator. If the length of the digits are five or
* less, there won't be any repeating digits required. For example, the value
* of 12345 would be formatted as 12,345 where the non-repeating digit is of
* length 3.
*
* @param {!Array<string>} parts An array to build the 'parts' of the formatted
* number including the values and separators.
* @param {number} zeroCode The value of the zero digit whether or not
* goog.i18n.NumberFormat.enforceAsciiDigits_ is enforced.
* @param {string} intPart The integer representation of the number to be
* formatted and referenced.
* @param {!Array<number>} groupingArray The array of numbers to determine the
* grouping of repeated and non-repeated digits.
* @return {!Array<string>} Returns the resulting parts variable containing
* how numbers are to be grouped and appear.
* @private
*/
goog.i18n.NumberFormat.prototype.formatNumberGroupingNonRepeatingDigitsParts_ =
function(parts, zeroCode, intPart, groupingArray) {
// Keep track of how much has been completed on the non repeated groups
var grouping = this.getNumberFormatSymbols_().GROUP_SEP;
var currentGroupSizeIndex;
var currentGroupSize = 0;
var digitLenLeft = intPart.length;
var rightToLeftParts = [];
// Start from the right most non-repeating group and work inwards
for (currentGroupSizeIndex = groupingArray.length - 1;
currentGroupSizeIndex >= 0 && digitLenLeft > 0;
currentGroupSizeIndex--) {
currentGroupSize = groupingArray[currentGroupSizeIndex];
// Iterate from the right most digit
for (var rightDigitIndex = 0; rightDigitIndex < currentGroupSize &&
((digitLenLeft - rightDigitIndex - 1) >= 0);
rightDigitIndex++) {
rightToLeftParts.push(String.fromCharCode(
zeroCode +
Number(intPart.charAt(digitLenLeft - rightDigitIndex - 1)) * 1));
}
// Update the number of digits left
digitLenLeft -= currentGroupSize;
if (digitLenLeft > 0) {
rightToLeftParts.push(grouping);
}
}
// Reverse and push onto the remaining parts
parts.push.apply(parts, rightToLeftParts.reverse());
return parts;
};
/**
* Formats a Number in fraction format.
*
* @param {number} number
* @param {number} minIntDigits Minimum integer digits.
* @param {Array<string>} parts
* This array holds the pieces of formatted string.
* This function will add its formatted pieces to the array.
* @private
*/
goog.i18n.NumberFormat.prototype.subformatFixed_ = function(
number, minIntDigits, parts) {
if (this.minimumFractionDigits_ > this.maximumFractionDigits_) {
throw new Error('Min value must be less than max value');
}
if (!parts) {
parts = [];
}
var rounded = this.roundNumber_(number);
var intValue = rounded.intValue;
var fracValue = rounded.fracValue;
var numIntDigits = (intValue == 0) ? 0 : this.intLog10_(intValue) + 1;
var fractionPresent = this.minimumFractionDigits_ > 0 || fracValue > 0 ||
(this.showTrailingZeros_ && numIntDigits < this.significantDigits_);
var minimumFractionDigits = this.minimumFractionDigits_;
if (fractionPresent) {
if (this.showTrailingZeros_ && this.significantDigits_ > 0) {
minimumFractionDigits = this.significantDigits_ - numIntDigits;
} else {
minimumFractionDigits = this.minimumFractionDigits_;
}
}
var intPart = '';
var translatableInt = intValue;
while (translatableInt > 1E20) {
// here it goes beyond double precision, add '0' make it look better
intPart = '0' + intPart;
translatableInt =
Math.round(goog.i18n.NumberFormat.decimalShift_(translatableInt, -1));
}
intPart = translatableInt + intPart;
var decimal = this.getNumberFormatSymbols_().DECIMAL_SEP;
var zeroCode = this.getNumberFormatSymbols_().ZERO_DIGIT.charCodeAt(0);
var digitLen = intPart.length;
var nonRepeatedGroupCount = 0;
if (intValue > 0 || minIntDigits > 0) {
for (var i = digitLen; i < minIntDigits; i++) {
parts.push(String.fromCharCode(zeroCode));
}
// If there's more than 1 number grouping,
// figure out the length of the non-repeated groupings (on the right)
if (this.groupingArray_.length >= 2) {
for (var j = 1; j < this.groupingArray_.length; j++) {
nonRepeatedGroupCount += this.groupingArray_[j];
}
}
// Anything left of the fixed number grouping is repeated,
// figure out the length of repeated groupings (on the left)
var repeatedDigitLen = digitLen - nonRepeatedGroupCount;
if (repeatedDigitLen > 0) {
// There are repeating digits and non-repeating digits
parts = this.formatNumberGroupingRepeatingDigitsParts_(
parts, zeroCode, intPart, this.groupingArray_, repeatedDigitLen);
} else {
// There are no repeating digits and only non-repeating digits
parts = this.formatNumberGroupingNonRepeatingDigitsParts_(
parts, zeroCode, intPart, this.groupingArray_);
}
} else if (!fractionPresent) {
// If there is no fraction present, and we haven't printed any
// integer digits, then print a zero.
parts.push(String.fromCharCode(zeroCode));
}
// Output the decimal separator if we always do so.
if (this.decimalSeparatorAlwaysShown_ || fractionPresent) {
parts.push(decimal);
}
var fracPart = String(fracValue);
// Handle case where fracPart is in scientific notation.
var fracPartSplit = fracPart.split('e+');
if (fracPartSplit.length == 2) {
// Only keep significant digits.
var floatFrac = parseFloat(fracPartSplit[0]);
fracPart = String(
this.roundToSignificantDigits_(floatFrac, this.significantDigits_, 1));
fracPart = fracPart.replace('.', '');
// Append zeroes based on the exponent.
var exp = parseInt(fracPartSplit[1], 10);
fracPart += goog.string.repeat('0', exp - fracPart.length + 1);
}
// Add Math.pow(10, this.maximumFractionDigits) to fracPart. Uses string ops
// to avoid complexity with scientific notation and overflows.
if (this.maximumFractionDigits_ + 1 > fracPart.length) {
var zeroesToAdd = this.maximumFractionDigits_ - fracPart.length;
fracPart = '1' + goog.string.repeat('0', zeroesToAdd) + fracPart;
}
var fracLen = fracPart.length;
while (fracPart.charAt(fracLen - 1) == '0' &&
fracLen > minimumFractionDigits + 1) {
fracLen--;
}
for (var i = 1; i < fracLen; i++) {
parts.push(String.fromCharCode(zeroCode + Number(fracPart.charAt(i)) * 1));
}
};
/**
* Formats exponent part of a Number.
*
* @param {number} exponent Exponential value.
* @param {Array<string>} parts The array that holds the pieces of formatted
* string. This function will append more formatted pieces to the array.
* @private
*/
goog.i18n.NumberFormat.prototype.addExponentPart_ = function(exponent, parts) {
parts.push(this.getNumberFormatSymbols_().EXP_SYMBOL);
if (exponent < 0) {
exponent = -exponent;
parts.push(this.getNumberFormatSymbols_().MINUS_SIGN);
} else if (this.useSignForPositiveExponent_) {
parts.push(this.getNumberFormatSymbols_().PLUS_SIGN);
}
var exponentDigits = '' + exponent;
var zeroChar = this.getNumberFormatSymbols_().ZERO_DIGIT;
for (var i = exponentDigits.length; i < this.minExponentDigits_; i++) {
parts.push(zeroChar);
}
parts.push(exponentDigits);
};
/**
* Returns the mantissa for the given value and its exponent.
*
* @param {number} value
* @param {number} exponent
* @return {number}
* @private
*/
goog.i18n.NumberFormat.prototype.getMantissa_ = function(value, exponent) {
return goog.i18n.NumberFormat.decimalShift_(value, -exponent);
};
/**
* Formats Number in exponential format.
*
* @param {number} number Value need to be formatted.
* @param {Array<string>} parts The array that holds the pieces of formatted
* string. This function will append more formatted pieces to the array.
* @private
*/
goog.i18n.NumberFormat.prototype.subformatExponential_ = function(
number, parts) {
if (number == 0.0) {
this.subformatFixed_(number, this.minimumIntegerDigits_, parts);
this.addExponentPart_(0, parts);
return;
}
var exponent = goog.math.safeFloor(Math.log(number) / Math.log(10));
number = this.getMantissa_(number, exponent);
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.
var remainder = exponent % this.maximumIntegerDigits_;
if (remainder < 0) {
remainder = this.maximumIntegerDigits_ + remainder;
}
number = goog.i18n.NumberFormat.decimalShift_(number, remainder);
exponent -= remainder;
minIntDigits = 1;
} else {
// No repeating range is defined; use minimum integer digits.
if (this.minimumIntegerDigits_ < 1) {
exponent++;
number = goog.i18n.NumberFormat.decimalShift_(number, -1);
} else {
exponent -= this.minimumIntegerDigits_ - 1;
number = goog.i18n.NumberFormat.decimalShift_(
number, 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 = this.getNumberFormatSymbols_().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';
/**
* A plus character.
* @type {string}
* @private
*/
goog.i18n.NumberFormat.PATTERN_PLUS_ = '+';
/**
* A generic currency sign 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.getCurrencyCode_();
} else {
switch (this.currencyStyle_) {
case goog.i18n.NumberFormat.CurrencyStyle.LOCAL:
affix += goog.i18n.currency.getLocalCurrencySign(
this.getCurrencyCode_());
break;
case goog.i18n.NumberFormat.CurrencyStyle.GLOBAL:
affix += goog.i18n.currency.getGlobalCurrencySign(
this.getCurrencyCode_());
break;
case goog.i18n.NumberFormat.CurrencyStyle.PORTABLE:
affix += goog.i18n.currency.getPortableCurrencySign(
this.getCurrencyCode_());
break;
default:
break;
}
}
break;
case goog.i18n.NumberFormat.PATTERN_PERCENT_:
if (!this.negativePercentSignExpected_ && this.multiplier_ != 1) {
throw new Error('Too many percent/permill');
} else if (
this.negativePercentSignExpected_ && this.multiplier_ != 100) {
throw new Error('Inconsistent use of percent/permill characters');
}
this.multiplier_ = 100;
this.negativePercentSignExpected_ = false;
affix += this.getNumberFormatSymbols_().PERCENT;
break;
case goog.i18n.NumberFormat.PATTERN_PER_MILLE_:
if (!this.negativePercentSignExpected_ && this.multiplier_ != 1) {
throw new Error('Too many percent/permill');
} else if (
this.negativePercentSignExpected_ && this.multiplier_ != 1000) {
throw new Error('Inconsistent use of percent/permill characters');
}
this.multiplier_ = 1000;
this.negativePercentSignExpected_ = false;
affix += this.getNumberFormatSymbols_().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 new Error('Unexpected "0" in pattern "' + pattern + '"');
}
zeroDigitCount++;
if (groupingCount >= 0 && decimalPos < 0) {
groupingCount++;
}
break;
case goog.i18n.NumberFormat.PATTERN_GROUPING_SEPARATOR_:
if (groupingCount > 0) {
this.groupingArray_.push(groupingCount);
}
groupingCount = 0;
break;
case goog.i18n.NumberFormat.PATTERN_DECIMAL_SEPARATOR_:
if (decimalPos >= 0) {
throw new Error(
'Multiple decimal separators in pattern "' + pattern + '"');
}
decimalPos = digitLeftCount + zeroDigitCount + digitRightCount;
break;
case goog.i18n.NumberFormat.PATTERN_EXPONENT_:
if (this.useExponentialNotation_) {
throw new 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 new 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 new 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;
}
}
// Add another number grouping at the end
this.groupingArray_.push(Math.max(0, groupingCount));
this.decimalSeparatorAlwaysShown_ =
decimalPos == 0 || decimalPos == totalDigits;
};
/**
* Alias for the compact format 'unit' object.
* @typedef {{
* prefix: string,
* suffix: string,
* divisorBase: number
* }}
*/
goog.i18n.NumberFormat.CompactNumberUnit;
/**
* The empty unit, corresponding to a base of 0.
* @private {!goog.i18n.NumberFormat.CompactNumberUnit}
*/
goog.i18n.NumberFormat.NULL_UNIT_ = {
prefix: '',
suffix: '',
divisorBase: 0
};
/**
* Get compact unit for a certain number of digits
*
* @param {number} base The number of digits to get the unit for.
* @param {string} plurality The plurality of the number.
* @return {!goog.i18n.NumberFormat.CompactNumberUnit} The compact unit.
* @private
*/
goog.i18n.NumberFormat.prototype.getUnitFor_ = function(base, plurality) {
var table = this.compactStyle_ == goog.i18n.NumberFormat.CompactStyle.SHORT ?
goog.i18n.CompactNumberFormatSymbols.COMPACT_DECIMAL_SHORT_PATTERN :
goog.i18n.CompactNumberFormatSymbols.COMPACT_DECIMAL_LONG_PATTERN;
if (!goog.isDefAndNotNull(table)) {
table = goog.i18n.CompactNumberFormatSymbols.COMPACT_DECIMAL_SHORT_PATTERN;
}
if (base < 3) {
return goog.i18n.NumberFormat.NULL_UNIT_;
} else {
var shift = goog.i18n.NumberFormat.decimalShift_;
base = Math.min(14, base);
var patterns = table[shift(1, base)];
var previousNonNullBase = base - 1;
while (!patterns && previousNonNullBase >= 3) {
patterns = table[shift(1, previousNonNullBase)];
previousNonNullBase--;
}
if (!patterns) {
return goog.i18n.NumberFormat.NULL_UNIT_;
}
var pattern = patterns[plurality];
if (!pattern || pattern == '0') {
return goog.i18n.NumberFormat.NULL_UNIT_;
}
var parts = /([^0]*)(0+)(.*)/.exec(pattern);
if (!parts) {
return goog.i18n.NumberFormat.NULL_UNIT_;
}
return {
prefix: parts[1],
suffix: parts[3],
divisorBase: (previousNonNullBase + 1) - (parts[2].length - 1)
};
}
};
/**
* Get the compact unit divisor, accounting for rounding of the quantity.
*
* @param {number} formattingNumber The number to base the formatting on. The
* unit will be calculated from this number.
* @param {number} pluralityNumber The number to use fo