forked from zhurui/management
88 lines
1.7 KiB
JavaScript
88 lines
1.7 KiB
JavaScript
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'use strict';
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const internals = {};
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module.exports = function (input) {
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if (!input) {
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return '';
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}
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let escaped = '';
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for (let i = 0; i < input.length; ++i) {
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const charCode = input.charCodeAt(i);
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if (internals.isSafe(charCode)) {
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escaped += input[i];
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}
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else {
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escaped += internals.escapeHtmlChar(charCode);
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}
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}
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return escaped;
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};
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internals.escapeHtmlChar = function (charCode) {
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const namedEscape = internals.namedHtml[charCode];
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if (typeof namedEscape !== 'undefined') {
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return namedEscape;
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}
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if (charCode >= 256) {
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return '&#' + charCode + ';';
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}
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const hexValue = charCode.toString(16).padStart(2, '0');
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return `&#x${hexValue};`;
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};
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internals.isSafe = function (charCode) {
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return (typeof internals.safeCharCodes[charCode] !== 'undefined');
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};
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internals.namedHtml = {
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'38': '&',
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'60': '<',
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'62': '>',
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'34': '"',
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'160': ' ',
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'162': '¢',
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'163': '£',
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'164': '¤',
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'169': '©',
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'174': '®'
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};
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internals.safeCharCodes = (function () {
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const safe = {};
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for (let i = 32; i < 123; ++i) {
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if ((i >= 97) || // a-z
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(i >= 65 && i <= 90) || // A-Z
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(i >= 48 && i <= 57) || // 0-9
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i === 32 || // space
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i === 46 || // .
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i === 44 || // ,
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i === 45 || // -
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i === 58 || // :
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i === 95) { // _
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safe[i] = null;
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}
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}
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return safe;
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}());
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