@blueprintjs/core/lib/esm/components/forms/numericInputUtils.js

/*
 * Copyright 2018 Palantir Technologies, Inc. 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.
 */
import { clamp } from "../../common/utils";
/** Returns the `decimal` number separator based on locale */
function getDecimalSeparator(locale) {
    var testNumber = 1.9;
    var testText = testNumber.toLocaleString(locale);
    var one = (1).toLocaleString(locale);
    var nine = (9).toLocaleString(locale);
    var pattern = one + "(.+)" + nine;
    var result = new RegExp(pattern).exec(testText);
    return (result && result[1]) || ".";
}
export function toLocaleString(num, locale) {
    if (locale === void 0) { locale = "en-US"; }
    return sanitizeNumericInput(num.toLocaleString(locale), locale);
}
export function clampValue(value, min, max) {
    // defaultProps won't work if the user passes in null, so just default
    // to +/- infinity here instead, as a catch-all.
    var adjustedMin = min != null ? min : -Infinity;
    var adjustedMax = max != null ? max : Infinity;
    return clamp(value, adjustedMin, adjustedMax);
}
export function getValueOrEmptyValue(value) {
    if (value === void 0) { value = ""; }
    return value.toString();
}
/** Transform the localized character (ex. "") to a javascript recognizable string number (ex. "10.99")  */
function transformLocalizedNumberToStringNumber(character, locale) {
    var charactersMap = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].map(function (value) { return value.toLocaleString(locale); });
    var jsNumber = charactersMap.indexOf(character);
    if (jsNumber !== -1) {
        return jsNumber;
    }
    else {
        return character;
    }
}
/** Transforms the localized number (ex. "10,99") to a javascript recognizable string number (ex. "10.99")  */
export function parseStringToStringNumber(value, locale) {
    var valueAsString = "" + value;
    if (parseFloat(valueAsString).toString() === value.toString()) {
        return value.toString();
    }
    if (locale !== undefined) {
        var decimalSeparator = getDecimalSeparator(locale);
        var sanitizedString = sanitizeNumericInput(valueAsString, locale);
        return sanitizedString
            .split("")
            .map(function (character) { return transformLocalizedNumberToStringNumber(character, locale); })
            .join("")
            .replace(decimalSeparator, ".");
    }
    return value.toString();
}
/** Returns `true` if the string represents a valid numeric value, like "1e6". */
export function isValueNumeric(value, locale) {
    // checking if a string is numeric in Typescript is a big pain, because
    // we can't simply toss a string parameter to isFinite. below is the
    // essential approach that jQuery uses, which involves subtracting a
    // parsed numeric value from the string representation of the value. we
    // need to cast the value to the `any` type to allow this operation
    // between dissimilar types.
    var stringToStringNumber = parseStringToStringNumber(value, locale);
    return value != null && stringToStringNumber - parseFloat(stringToStringNumber) + 1 >= 0;
}
export function isValidNumericKeyboardEvent(e, locale) {
    // unit tests may not include e.key. don't bother disabling those events.
    if (e.key == null) {
        return true;
    }
    // allow modified key strokes that may involve letters and other
    // non-numeric/invalid characters (Cmd + A, Cmd + C, Cmd + V, Cmd + X).
    if (e.ctrlKey || e.altKey || e.metaKey) {
        return true;
    }
    // keys that print a single character when pressed have a `key` name of
    // length 1. every other key has a longer `key` name (e.g. "Backspace",
    // "ArrowUp", "Shift"). since none of those keys can print a character
    // to the field--and since they may have important native behaviors
    // beyond printing a character--we don't want to disable their effects.
    var isSingleCharKey = e.key.length === 1;
    if (!isSingleCharKey) {
        return true;
    }
    // now we can simply check that the single character that wants to be printed
    // is a floating-point number character that we're allowed to print.
    return isFloatingPointNumericCharacter(e.key, locale);
}
/**
 * A regex that matches a string of length 1 (i.e. a standalone character)
 * if and only if it is a floating-point number character as defined by W3C:
 * https://www.w3.org/TR/2012/WD-html-markup-20120329/datatypes.html#common.data.float
 *
 * Floating-point number characters are the only characters that can be
 * printed within a default input[type="number"]. This component should
 * behave the same way when this.props.allowNumericCharactersOnly = true.
 * See here for the input[type="number"].value spec:
 * https://www.w3.org/TR/2012/WD-html-markup-20120329/input.number.html#input.number.attrs.value
 */
function isFloatingPointNumericCharacter(character, locale) {
    if (locale !== undefined) {
        var decimalSeparator = getDecimalSeparator(locale).replace(".", "\\.");
        var numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].map(function (value) { return value.toLocaleString(locale); }).join("");
        var localeFloatingPointNumericCharacterRegex = new RegExp("^[Ee" + numbers + "\\+\\-" + decimalSeparator + "]$");
        return localeFloatingPointNumericCharacterRegex.test(character);
    }
    else {
        var floatingPointNumericCharacterRegex = /^[Ee0-9\+\-\.]$/;
        return floatingPointNumericCharacterRegex.test(character);
    }
}
/**
 * Round the value to have _up to_ the specified maximum precision.
 *
 * This differs from `toFixed(5)` in that trailing zeroes are not added on
 * more precise values, resulting in shorter strings.
 */
export function toMaxPrecision(value, maxPrecision) {
    // round the value to have the specified maximum precision (toFixed is the wrong choice,
    // because it would show trailing zeros in the decimal part out to the specified precision)
    // source: http://stackoverflow.com/a/18358056/5199574
    var scaleFactor = Math.pow(10, maxPrecision);
    return Math.round(value * scaleFactor) / scaleFactor;
}
/**
 * Convert Japanese full-width numbers, e.g. '５', to ASCII, e.g. '5'
 * This should be called before performing any other numeric string input validation.
 */
function convertFullWidthNumbersToAscii(value) {
    return value.replace(/[\uFF10-\uFF19]/g, function (m) { return String.fromCharCode(m.charCodeAt(0) - 0xfee0); });
}
/**
 * Convert full-width (Japanese) numbers to ASCII, and strip all characters that are not valid floating-point numeric characters
 */
export function sanitizeNumericInput(value, locale) {
    var valueChars = convertFullWidthNumbersToAscii(value).split("");
    var sanitizedValueChars = valueChars.filter(function (valueChar) { return isFloatingPointNumericCharacter(valueChar, locale); });
    return sanitizedValueChars.join("");
}
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