xml-entities.js
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var ALPHA_INDEX = {
'<': '<',
'>': '>',
'"': '"',
'&apos': '\'',
'&': '&',
'<': '<',
'>': '>',
'"': '"',
''': '\'',
'&': '&'
};
var CHAR_INDEX = {
60: 'lt',
62: 'gt',
34: 'quot',
39: 'apos',
38: 'amp'
};
var CHAR_S_INDEX = {
'<': '<',
'>': '>',
'"': '"',
'\'': ''',
'&': '&'
};
/**
* @constructor
*/
function XmlEntities() {}
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.prototype.encode = function(str) {
if (!str || !str.length) {
return '';
}
return str.replace(/<|>|"|'|&/g, function(s) {
return CHAR_S_INDEX[s];
});
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.encode = function(str) {
return new XmlEntities().encode(str);
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.prototype.decode = function(str) {
if (!str || !str.length) {
return '';
}
return str.replace(/&#?[0-9a-zA-Z]+;?/g, function(s) {
if (s.charAt(1) === '#') {
var code = s.charAt(2).toLowerCase() === 'x' ?
parseInt(s.substr(3), 16) :
parseInt(s.substr(2));
if (isNaN(code) || code < -32768 || code > 65535) {
return '';
}
return String.fromCharCode(code);
}
return ALPHA_INDEX[s] || s;
});
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.decode = function(str) {
return new XmlEntities().decode(str);
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.prototype.encodeNonUTF = function(str) {
if (!str || !str.length) {
return '';
}
var strLength = str.length;
var result = '';
var i = 0;
while (i < strLength) {
var c = str.charCodeAt(i);
var alpha = CHAR_INDEX[c];
if (alpha) {
result += "&" + alpha + ";";
i++;
continue;
}
if (c < 32 || c > 126) {
result += '&#' + c + ';';
} else {
result += str.charAt(i);
}
i++;
}
return result;
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.encodeNonUTF = function(str) {
return new XmlEntities().encodeNonUTF(str);
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.prototype.encodeNonASCII = function(str) {
if (!str || !str.length) {
return '';
}
var strLenght = str.length;
var result = '';
var i = 0;
while (i < strLenght) {
var c = str.charCodeAt(i);
if (c <= 255) {
result += str[i++];
continue;
}
result += '&#' + c + ';';
i++;
}
return result;
};
/**
* @param {String} str
* @returns {String}
*/
XmlEntities.encodeNonASCII = function(str) {
return new XmlEntities().encodeNonASCII(str);
};
module.exports = XmlEntities;