1 // Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com>
2 // 2007, Petr Baudis <pasky@suse.cz>
3 // 2008-2011, Jakub Narebski <jnareb@gmail.com>
6 * @fileOverview Generic JavaScript code (helper functions)
7 * @license GPLv2 or later
11 /* ============================================================ */
12 /* ............................................................ */
16 * pad number N with nonbreakable spaces on the left, to WIDTH characters
17 * example: padLeftStr(12, 3, '\u00A0') == '\u00A012'
18 * ('\u00A0' is nonbreakable space)
20 * @param {Number|String} input: number to pad
21 * @param {Number} width: visible width of output
22 * @param {String} str: string to prefix to string, e.g. '\u00A0'
23 * @returns {String} INPUT prefixed with (WIDTH - INPUT.length) x STR
25 function padLeftStr(input, width, str) {
28 width -= input.toString().length;
33 return prefix + input;
37 * Pad INPUT on the left to SIZE width, using given padding character CH,
38 * for example padLeft('a', 3, '_') is '__a'.
40 * @param {String} input: input value converted to string.
41 * @param {Number} width: desired length of output.
42 * @param {String} ch: single character to prefix to string.
44 * @returns {String} Modified string, at least SIZE length.
46 function padLeft(input, width, ch) {
48 while (s.length < width) {
55 /* ............................................................ */
59 * Create XMLHttpRequest object in cross-browser way
60 * @returns XMLHttpRequest object, or null
62 function createRequestObject() {
64 return new XMLHttpRequest();
67 return window.createRequest();
70 return new ActiveXObject("Msxml2.XMLHTTP");
73 return new ActiveXObject("Microsoft.XMLHTTP");
80 /* ............................................................ */
84 * used to extract hours and minutes from timezone info, e.g '-0900'
87 var tzRe = /^([+-])([0-9][0-9])([0-9][0-9])$/;
90 * convert numeric timezone +/-ZZZZ to offset from UTC in seconds
92 * @param {String} timezoneInfo: numeric timezone '(+|-)HHMM'
93 * @returns {Number} offset from UTC in seconds for timezone
97 function timezoneOffset(timezoneInfo) {
98 var match = tzRe.exec(timezoneInfo);
99 var tz_sign = (match[1] === '-' ? -1 : +1);
100 var tz_hour = parseInt(match[2],10);
101 var tz_min = parseInt(match[3],10);
103 return tz_sign*(((tz_hour*60) + tz_min)*60);
107 * return date in local time formatted in iso-8601 like format
108 * 'yyyy-mm-dd HH:MM:SS +/-ZZZZ' e.g. '2005-08-07 21:49:46 +0200'
110 * @param {Number} epoch: seconds since '00:00:00 1970-01-01 UTC'
111 * @param {String} timezoneInfo: numeric timezone '(+|-)HHMM'
112 * @returns {String} date in local time in iso-8601 like format
114 function formatDateISOLocal(epoch, timezoneInfo) {
115 // date corrected by timezone
116 var localDate = new Date(1000 * (epoch +
117 timezoneOffset(timezoneInfo)));
118 var localDateStr = // e.g. '2005-08-07'
119 localDate.getUTCFullYear() + '-' +
120 padLeft(localDate.getUTCMonth()+1, 2, '0') + '-' +
121 padLeft(localDate.getUTCDate(), 2, '0');
122 var localTimeStr = // e.g. '21:49:46'
123 padLeft(localDate.getUTCHours(), 2, '0') + ':' +
124 padLeft(localDate.getUTCMinutes(), 2, '0') + ':' +
125 padLeft(localDate.getUTCSeconds(), 2, '0');
127 return localDateStr + ' ' + localTimeStr + ' ' + timezoneInfo;
131 /* ............................................................ */
132 /* unquoting/unescaping filenames */
137 var escCodeRe = /\\([^0-7]|[0-7]{1,3})/g;
138 var octEscRe = /^[0-7]{1,3}$/;
139 var maybeQuotedRe = /^\"(.*)\"$/;
143 * unquote maybe git-quoted filename
144 * e.g. 'aa' -> 'aa', '"a\ta"' -> 'a a'
146 * @param {String} str: git-quoted string
147 * @returns {String} Unquoted and unescaped string
149 * @globals escCodeRe, octEscRe, maybeQuotedRe
151 function unquote(str) {
154 // character escape codes, aka escape sequences (from C)
155 // replacements are to some extent JavaScript specific
156 t: "\t", // tab (HT, TAB)
157 n: "\n", // newline (NL)
158 r: "\r", // return (CR)
159 f: "\f", // form feed (FF)
160 b: "\b", // backspace (BS)
161 a: "\x07", // alarm (bell) (BEL)
162 e: "\x1B", // escape (ESC)
163 v: "\v" // vertical tab (VT)
166 if (seq.search(octEscRe) !== -1) {
167 // octal char sequence
168 return String.fromCharCode(parseInt(seq, 8));
169 } else if (seq in es) {
170 // C escape sequence, aka character escape code
173 // quoted ordinary character
177 var match = str.match(maybeQuotedRe);
180 // perhaps str = eval('"'+str+'"'); would be enough?
181 str = str.replace(escCodeRe,
182 function (substr, p1, offset, s) { return unq(p1); });
187 /* end of common-lib.js */