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/*
* EJS Embedded JavaScript templates
* Copyright 2112 Matthew Eernisse (mde@fleegix.org)
*
* 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.
*
*/
/**
* Private utility functions
* @module utils
* @private
*/
'use strict';
var regExpChars = /[|\\{}()[\]^$+*?.]/g;
/**
* Escape characters reserved in regular expressions.
*
* If `string` is `undefined` or `null`, the empty string is returned.
*
* @param {String} string Input string
* @return {String} Escaped string
* @static
* @private
*/
exports.escapeRegExpChars = function (string) {
// istanbul ignore if
if (!string) {
return '';
}
return String(string).replace(regExpChars, '\\$&');
};
var _ENCODE_HTML_RULES = {
'&': '&',
'<': '&lt;',
'>': '&gt;',
'"': '&#34;',
"'": '&#39;'
};
var _MATCH_HTML = /[&<>'"]/g;
function encode_char(c) {
return _ENCODE_HTML_RULES[c] || c;
}
/**
* Stringified version of constants used by {@link module:utils.escapeXML}.
*
* It is used in the process of generating {@link ClientFunction}s.
*
* @readonly
* @type {String}
*/
var escapeFuncStr =
'var _ENCODE_HTML_RULES = {\n'
+ ' "&": "&amp;"\n'
+ ' , "<": "&lt;"\n'
+ ' , ">": "&gt;"\n'
+ ' , \'"\': "&#34;"\n'
+ ' , "\'": "&#39;"\n'
+ ' }\n'
+ ' , _MATCH_HTML = /[&<>\'"]/g;\n'
+ 'function encode_char(c) {\n'
+ ' return _ENCODE_HTML_RULES[c] || c;\n'
+ '};\n';
/**
* Escape characters reserved in XML.
*
* If `markup` is `undefined` or `null`, the empty string is returned.
*
* @implements {EscapeCallback}
* @param {String} markup Input string
* @return {String} Escaped string
* @static
* @private
*/
exports.escapeXML = function (markup) {
return markup == undefined
? ''
: String(markup)
.replace(_MATCH_HTML, encode_char);
};
exports.escapeXML.toString = function () {
return Function.prototype.toString.call(this) + ';\n' + escapeFuncStr;
};
/**
* Naive copy of properties from one object to another.
* Does not recurse into non-scalar properties
* Does not check to see if the property has a value before copying
*
* @param {Object} to Destination object
* @param {Object} from Source object
* @return {Object} Destination object
* @static
* @private
*/
exports.shallowCopy = function (to, from) {
from = from || {};
for (var p in from) {
to[p] = from[p];
}
return to;
};
/**
* Naive copy of a list of key names, from one object to another.
* Only copies property if it is actually defined
* Does not recurse into non-scalar properties
*
* @param {Object} to Destination object
* @param {Object} from Source object
* @param {Array} list List of properties to copy
* @return {Object} Destination object
* @static
* @private
*/
exports.shallowCopyFromList = function (to, from, list) {
for (var i = 0; i < list.length; i++) {
var p = list[i];
if (typeof from[p] != 'undefined') {
to[p] = from[p];
}
}
return to;
};
/**
* Simple in-process cache implementation. Does not implement limits of any
* sort.
*
* @implements Cache
* @static
* @private
*/
exports.cache = {
_data: {},
set: function (key, val) {
this._data[key] = val;
},
get: function (key) {
return this._data[key];
},
remove: function (key) {
delete this._data[key];
},
reset: function () {
this._data = {};
}
};