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Diffstat (limited to 'gitweb/static/js/lib/common-lib.js')
| -rw-r--r-- | gitweb/static/js/lib/common-lib.js | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/gitweb/static/js/lib/common-lib.js b/gitweb/static/js/lib/common-lib.js new file mode 100644 index 0000000000..018bbb7d4c --- /dev/null +++ b/gitweb/static/js/lib/common-lib.js @@ -0,0 +1,224 @@ +// Copyright (C) 2007, Fredrik Kuivinen <frekui@gmail.com> +// 2007, Petr Baudis <pasky@suse.cz> +// 2008-2011, Jakub Narebski <jnareb@gmail.com> + +/** + * @fileOverview Generic JavaScript code (helper functions) + * @license GPLv2 or later + */ + + +/* ============================================================ */ +/* ............................................................ */ +/* Padding */ + +/** + * pad INPUT on the left with STR that is assumed to have visible + * width of single character (for example nonbreakable spaces), + * to WIDTH characters + * + * example: padLeftStr(12, 3, '\u00A0') == '\u00A012' + * ('\u00A0' is nonbreakable space) + * + * @param {Number|String} input: number to pad + * @param {Number} width: visible width of output + * @param {String} str: string to prefix to string, defaults to '\u00A0' + * @returns {String} INPUT prefixed with STR x (WIDTH - INPUT.length) + */ +function padLeftStr(input, width, str) { + var prefix = ''; + if (typeof str === 'undefined') { + ch = '\u00A0'; // using ' ' doesn't work in all browsers + } + + width -= input.toString().length; + while (width > 0) { + prefix += str; + width--; + } + return prefix + input; +} + +/** + * Pad INPUT on the left to WIDTH, using given padding character CH, + * for example padLeft('a', 3, '_') is '__a' + * padLeft(4, 2) is '04' (same as padLeft(4, 2, '0')) + * + * @param {String} input: input value converted to string. + * @param {Number} width: desired length of output. + * @param {String} ch: single character to prefix to string, defaults to '0'. + * + * @returns {String} Modified string, at least SIZE length. + */ +function padLeft(input, width, ch) { + var s = input + ""; + if (typeof ch === 'undefined') { + ch = '0'; + } + + while (s.length < width) { + s = ch + s; + } + return s; +} + + +/* ............................................................ */ +/* Handling browser incompatibilities */ + +/** + * Create XMLHttpRequest object in cross-browser way + * @returns XMLHttpRequest object, or null + */ +function createRequestObject() { + try { + return new XMLHttpRequest(); + } catch (e) {} + try { + return window.createRequest(); + } catch (e) {} + try { + return new ActiveXObject("Msxml2.XMLHTTP"); + } catch (e) {} + try { + return new ActiveXObject("Microsoft.XMLHTTP"); + } catch (e) {} + + return null; +} + + +/** + * Insert rule giving specified STYLE to given SELECTOR at the end of + * first CSS stylesheet. + * + * @param {String} selector: CSS selector, e.g. '.class' + * @param {String} style: rule contents, e.g. 'background-color: red;' + */ +function addCssRule(selector, style) { + var stylesheet = document.styleSheets[0]; + + var theRules = []; + if (stylesheet.cssRules) { // W3C way + theRules = stylesheet.cssRules; + } else if (stylesheet.rules) { // IE way + theRules = stylesheet.rules; + } + + if (stylesheet.insertRule) { // W3C way + stylesheet.insertRule(selector + ' { ' + style + ' }', theRules.length); + } else if (stylesheet.addRule) { // IE way + stylesheet.addRule(selector, style); + } +} + + +/* ............................................................ */ +/* Support for legacy browsers */ + +/** + * Provides getElementsByClassName method, if there is no native + * implementation of this method. + * + * NOTE that there are limits and differences compared to native + * getElementsByClassName as defined by e.g.: + * https://developer.mozilla.org/en/DOM/document.getElementsByClassName + * http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#dom-getelementsbyclassname + * http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#dom-document-getelementsbyclassname + * + * Namely, this implementation supports only single class name as + * argument and not set of space-separated tokens representing classes, + * it returns Array of nodes rather than live NodeList, and has + * additional optional argument where you can limit search to given tags + * (via getElementsByTagName). + * + * Based on + * http://code.google.com/p/getelementsbyclassname/ + * http://www.dustindiaz.com/getelementsbyclass/ + * http://stackoverflow.com/questions/1818865/do-we-have-getelementsbyclassname-in-javascript + * + * See also http://ejohn.org/blog/getelementsbyclassname-speed-comparison/ + * + * @param {String} class: name of _single_ class to find + * @param {String} [taghint] limit search to given tags + * @returns {Node[]} array of matching elements + */ +if (!('getElementsByClassName' in document)) { + document.getElementsByClassName = function (classname, taghint) { + taghint = taghint || "*"; + var elements = (taghint === "*" && document.all) ? + document.all : + document.getElementsByTagName(taghint); + var pattern = new RegExp("(^|\\s)" + classname + "(\\s|$)"); + var matches= []; + for (var i = 0, j = 0, n = elements.length; i < n; i++) { + var el= elements[i]; + if (el.className && pattern.test(el.className)) { + // matches.push(el); + matches[j] = el; + j++; + } + } + return matches; + }; +} // end if + + +/* ............................................................ */ +/* unquoting/unescaping filenames */ + +/**#@+ + * @constant + */ +var escCodeRe = /\\([^0-7]|[0-7]{1,3})/g; +var octEscRe = /^[0-7]{1,3}$/; +var maybeQuotedRe = /^\"(.*)\"$/; +/**#@-*/ + +/** + * unquote maybe C-quoted filename (as used by git, i.e. it is + * in double quotes '"' if there is any escape character used) + * e.g. 'aa' -> 'aa', '"a\ta"' -> 'a a' + * + * @param {String} str: git-quoted string + * @returns {String} Unquoted and unescaped string + * + * @globals escCodeRe, octEscRe, maybeQuotedRe + */ +function unquote(str) { + function unq(seq) { + var es = { + // character escape codes, aka escape sequences (from C) + // replacements are to some extent JavaScript specific + t: "\t", // tab (HT, TAB) + n: "\n", // newline (NL) + r: "\r", // return (CR) + f: "\f", // form feed (FF) + b: "\b", // backspace (BS) + a: "\x07", // alarm (bell) (BEL) + e: "\x1B", // escape (ESC) + v: "\v" // vertical tab (VT) + }; + + if (seq.search(octEscRe) !== -1) { + // octal char sequence + return String.fromCharCode(parseInt(seq, 8)); + } else if (seq in es) { + // C escape sequence, aka character escape code + return es[seq]; + } + // quoted ordinary character + return seq; + } + + var match = str.match(maybeQuotedRe); + if (match) { + str = match[1]; + // perhaps str = eval('"'+str+'"'); would be enough? + str = str.replace(escCodeRe, + function (substr, p1, offset, s) { return unq(p1); }); + } + return str; +} + +/* end of common-lib.js */ |