adaptive-expressions
Version:
Common Expression Language
67 lines • 2.94 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.FormatNumber = void 0;
const d3_format_1 = require("../../vendors/d3-format");
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
const localeInfo_1 = require("../localeInfo");
/**
* Format number into required decimal numbers.
*/
class FormatNumber extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [FormatNumber](xref:adaptive-expressions.FormatNumber) class.
*/
constructor() {
super(expressionType_1.ExpressionType.FormatNumber, FormatNumber.evaluator(), returnType_1.ReturnType.String, FormatNumber.validator);
}
/**
* @private
*/
static evaluator() {
return functionUtils_1.FunctionUtils.applyWithOptionsAndError((args, options) => {
let value = null;
let error;
const number = args[0];
const precision = args[1];
let locale = options.locale ? options.locale : Intl.DateTimeFormat().resolvedOptions().locale;
locale = functionUtils_1.FunctionUtils.determineLocale(args, 3, locale);
if (!functionUtils_1.FunctionUtils.isNumber(number)) {
error = `formatNumber first argument ${number} must be a number`;
}
else if (!functionUtils_1.FunctionUtils.isNumber(precision)) {
error = `formatNumber second argument ${precision} must be a number`;
}
else if (locale && typeof locale !== 'string') {
error = `formatNubmer third argument ${locale} is not a valid locale`;
}
else {
const fixedNotation = `,.${precision}f`;
const roundedNumber = this.roundToPrecision(number, precision);
const formatLocale = localeInfo_1.localeInfo[locale];
if (formatLocale !== undefined) {
value = (0, d3_format_1.formatLocale)(formatLocale).format(fixedNotation)(roundedNumber);
}
else {
value = (0, d3_format_1.format)(fixedNotation)(roundedNumber);
}
}
return { value, error };
});
}
static validator(expr) {
functionUtils_1.FunctionUtils.validateOrder(expr, [returnType_1.ReturnType.String], returnType_1.ReturnType.Number, returnType_1.ReturnType.Number);
}
}
exports.FormatNumber = FormatNumber;
FormatNumber.roundToPrecision = (num, digits) => Math.round(num * Math.pow(10, digits)) / Math.pow(10, digits);
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