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408 lines
12 KiB
JavaScript
408 lines
12 KiB
JavaScript
/*
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* All the Date functions below are the excellent work of Baron Schwartz
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* They generate precompiled functions from date formats instead of parsing and processing
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* the format everytime you do something with a date.
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*/
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/** @ignore */
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Date.parseFunctions = {count:0};
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/** @ignore */
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Date.parseRegexes = [];
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/** @ignore */
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Date.formatFunctions = {count:0};
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/**
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* Formats a date given to the supplied format - the format syntax is the same as <a href="http://www.php.net/date">PHP's date() function</a>.
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*/
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Date.prototype.dateFormat = function(format) {
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if (Date.formatFunctions[format] == null) {
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Date.createNewFormat(format);
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}
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var func = Date.formatFunctions[format];
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return this[func]();
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};
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/**
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* Same as {@link #dateFormat}
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*/
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Date.prototype.format = Date.prototype.dateFormat;
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/** @ignore */
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Date.createNewFormat = function(format) {
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var funcName = "format" + Date.formatFunctions.count++;
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Date.formatFunctions[format] = funcName;
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var code = "Date.prototype." + funcName + " = function(){return ";
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var special = false;
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var ch = '';
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for (var i = 0; i < format.length; ++i) {
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ch = format.charAt(i);
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if (!special && ch == "\\") {
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special = true;
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}
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else if (special) {
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special = false;
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code += "'" + String.escape(ch) + "' + ";
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}
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else {
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code += Date.getFormatCode(ch);
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}
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}
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eval(code.substring(0, code.length - 3) + ";}");
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};
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/** @ignore */
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Date.getFormatCode = function(character) {
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switch (character) {
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case "d":
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return "String.leftPad(this.getDate(), 2, '0') + ";
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case "D":
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return "Date.dayNames[this.getDay()].substring(0, 3) + ";
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case "j":
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return "this.getDate() + ";
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case "l":
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return "Date.dayNames[this.getDay()] + ";
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case "S":
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return "this.getSuffix() + ";
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case "w":
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return "this.getDay() + ";
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case "z":
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return "this.getDayOfYear() + ";
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case "W":
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return "this.getWeekOfYear() + ";
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case "F":
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return "Date.monthNames[this.getMonth()] + ";
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case "m":
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return "String.leftPad(this.getMonth() + 1, 2, '0') + ";
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case "M":
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return "Date.monthNames[this.getMonth()].substring(0, 3) + ";
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case "n":
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return "(this.getMonth() + 1) + ";
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case "t":
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return "this.getDaysInMonth() + ";
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case "L":
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return "(this.isLeapYear() ? 1 : 0) + ";
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case "Y":
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return "this.getFullYear() + ";
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case "y":
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return "('' + this.getFullYear()).substring(2, 4) + ";
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case "a":
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return "(this.getHours() < 12 ? 'am' : 'pm') + ";
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case "A":
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return "(this.getHours() < 12 ? 'AM' : 'PM') + ";
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case "g":
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return "((this.getHours() %12) ? this.getHours() % 12 : 12) + ";
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case "G":
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return "this.getHours() + ";
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case "h":
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return "String.leftPad((this.getHours() %12) ? this.getHours() % 12 : 12, 2, '0') + ";
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case "H":
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return "String.leftPad(this.getHours(), 2, '0') + ";
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case "i":
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return "String.leftPad(this.getMinutes(), 2, '0') + ";
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case "s":
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return "String.leftPad(this.getSeconds(), 2, '0') + ";
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case "O":
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return "this.getGMTOffset() + ";
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case "T":
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return "this.getTimezone() + ";
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case "Z":
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return "(this.getTimezoneOffset() * -60) + ";
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default:
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return "'" + String.escape(character) + "' + ";
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};
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};
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/**
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* Parses a date given the supplied format - the format syntax is the same as <a href="http://www.php.net/date">PHP's date() function</a>.
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*/
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Date.parseDate = function(input, format) {
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if (Date.parseFunctions[format] == null) {
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Date.createParser(format);
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}
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var func = Date.parseFunctions[format];
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return Date[func](input);
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};
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/** @ignore */
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Date.createParser = function(format) {
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var funcName = "parse" + Date.parseFunctions.count++;
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var regexNum = Date.parseRegexes.length;
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var currentGroup = 1;
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Date.parseFunctions[format] = funcName;
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var code = "Date." + funcName + " = function(input){\n"
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+ "var y = -1, m = -1, d = -1, h = -1, i = -1, s = -1;\n"
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+ "var d = new Date();\n"
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+ "y = d.getFullYear();\n"
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+ "m = d.getMonth();\n"
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+ "d = d.getDate();\n"
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+ "var results = input.match(Date.parseRegexes[" + regexNum + "]);\n"
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+ "if (results && results.length > 0) {"
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var regex = "";
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var special = false;
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var ch = '';
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for (var i = 0; i < format.length; ++i) {
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ch = format.charAt(i);
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if (!special && ch == "\\") {
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special = true;
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}
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else if (special) {
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special = false;
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regex += String.escape(ch);
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}
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else {
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obj = Date.formatCodeToRegex(ch, currentGroup);
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currentGroup += obj.g;
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regex += obj.s;
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if (obj.g && obj.c) {
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code += obj.c;
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}
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}
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}
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code += "if (y > 0 && m >= 0 && d > 0 && h >= 0 && i >= 0 && s >= 0)\n"
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+ "{return new Date(y, m, d, h, i, s);}\n"
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+ "else if (y > 0 && m >= 0 && d > 0 && h >= 0 && i >= 0)\n"
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+ "{return new Date(y, m, d, h, i);}\n"
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+ "else if (y > 0 && m >= 0 && d > 0 && h >= 0)\n"
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+ "{return new Date(y, m, d, h);}\n"
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+ "else if (y > 0 && m >= 0 && d > 0)\n"
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+ "{return new Date(y, m, d);}\n"
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+ "else if (y > 0 && m >= 0)\n"
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+ "{return new Date(y, m);}\n"
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+ "else if (y > 0)\n"
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+ "{return new Date(y);}\n"
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+ "}return null;}";
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Date.parseRegexes[regexNum] = new RegExp("^" + regex + "$");
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eval(code);
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};
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/** @ignore */
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Date.formatCodeToRegex = function(character, currentGroup) {
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switch (character) {
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case "D":
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return {g:0,
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c:null,
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s:"(?:Sun|Mon|Tue|Wed|Thu|Fri|Sat)"};
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case "j":
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case "d":
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return {g:1,
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c:"d = parseInt(results[" + currentGroup + "], 10);\n",
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s:"(\\d{1,2})"};
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case "l":
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return {g:0,
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c:null,
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s:"(?:" + Date.dayNames.join("|") + ")"};
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case "S":
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return {g:0,
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c:null,
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s:"(?:st|nd|rd|th)"};
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case "w":
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return {g:0,
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c:null,
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s:"\\d"};
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case "z":
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return {g:0,
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c:null,
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s:"(?:\\d{1,3})"};
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case "W":
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return {g:0,
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c:null,
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s:"(?:\\d{2})"};
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case "F":
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return {g:1,
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c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "].substring(0, 3)], 10);\n",
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s:"(" + Date.monthNames.join("|") + ")"};
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case "M":
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return {g:1,
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c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "]], 10);\n",
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s:"(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)"};
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case "n":
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case "m":
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return {g:1,
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c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",
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s:"(\\d{1,2})"};
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case "t":
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return {g:0,
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c:null,
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s:"\\d{1,2}"};
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case "L":
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return {g:0,
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c:null,
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s:"(?:1|0)"};
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case "Y":
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return {g:1,
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c:"y = parseInt(results[" + currentGroup + "], 10);\n",
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s:"(\\d{4})"};
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case "y":
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return {g:1,
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c:"var ty = parseInt(results[" + currentGroup + "], 10);\n"
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+ "y = ty > Date.y2kYear ? 1900 + ty : 2000 + ty;\n",
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s:"(\\d{1,2})"};
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case "a":
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return {g:1,
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c:"if (results[" + currentGroup + "] == 'am') {\n"
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+ "if (h == 12) { h = 0; }\n"
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+ "} else { if (h < 12) { h += 12; }}",
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s:"(am|pm)"};
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case "A":
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return {g:1,
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c:"if (results[" + currentGroup + "] == 'AM') {\n"
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+ "if (h == 12) { h = 0; }\n"
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+ "} else { if (h < 12) { h += 12; }}",
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s:"(AM|PM)"};
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case "g":
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case "G":
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case "h":
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case "H":
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return {g:1,
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c:"h = parseInt(results[" + currentGroup + "], 10);\n",
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s:"(\\d{1,2})"};
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case "i":
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return {g:1,
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c:"i = parseInt(results[" + currentGroup + "], 10);\n",
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s:"(\\d{2})"};
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case "s":
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return {g:1,
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c:"s = parseInt(results[" + currentGroup + "], 10);\n",
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s:"(\\d{2})"};
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case "O":
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return {g:0,
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c:null,
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s:"[+-]\\d{4}"};
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case "T":
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return {g:0,
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c:null,
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s:"[A-Z]{3}"};
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case "Z":
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return {g:0,
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c:null,
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s:"[+-]\\d{1,5}"};
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default:
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return {g:0,
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c:null,
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s:String.escape(character)};
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}
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};
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Date.prototype.getTimezone = function() {
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return this.toString().replace(
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/^.*? ([A-Z]{3}) [0-9]{4}.*$/, "$1").replace(
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/^.*?\(([A-Z])[a-z]+ ([A-Z])[a-z]+ ([A-Z])[a-z]+\)$/, "$1$2$3");
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};
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Date.prototype.getGMTOffset = function() {
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return (this.getTimezoneOffset() > 0 ? "-" : "+")
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+ String.leftPad(Math.floor(this.getTimezoneOffset() / 60), 2, "0")
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+ String.leftPad(this.getTimezoneOffset() % 60, 2, "0");
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};
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Date.prototype.getDayOfYear = function() {
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var num = 0;
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Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
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for (var i = 0; i < this.getMonth(); ++i) {
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num += Date.daysInMonth[i];
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}
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return num + this.getDate() - 1;
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};
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Date.prototype.getWeekOfYear = function() {
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// Skip to Thursday of this week
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var now = this.getDayOfYear() + (4 - this.getDay());
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// Find the first Thursday of the year
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var jan1 = new Date(this.getFullYear(), 0, 1);
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var then = (7 - jan1.getDay() + 4);
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return String.leftPad(((now - then) / 7) + 1, 2, "0");
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};
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Date.prototype.isLeapYear = function() {
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var year = this.getFullYear();
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return ((year & 3) == 0 && (year % 100 || (year % 400 == 0 && year)));
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};
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Date.prototype.getFirstDayOfMonth = function() {
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var day = (this.getDay() - (this.getDate() - 1)) % 7;
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return (day < 0) ? (day + 7) : day;
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};
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Date.prototype.getLastDayOfMonth = function() {
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var day = (this.getDay() + (Date.daysInMonth[this.getMonth()] - this.getDate())) % 7;
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return (day < 0) ? (day + 7) : day;
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};
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Date.prototype.getDaysInMonth = function() {
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Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
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return Date.daysInMonth[this.getMonth()];
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};
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/** @ignore */
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Date.prototype.getSuffix = function() {
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switch (this.getDate()) {
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case 1:
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case 21:
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case 31:
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return "st";
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case 2:
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case 22:
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return "nd";
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case 3:
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case 23:
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return "rd";
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default:
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return "th";
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}
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};
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/** @ignore */
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Date.daysInMonth = [31,28,31,30,31,30,31,31,30,31,30,31];
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/**
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* Override these values for international dates, for example...
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* Date.monthNames = ['JanInYourLang', 'FebInYourLang', ...];
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*/
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Date.monthNames =
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["January",
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"February",
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"March",
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"April",
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"May",
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"June",
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"July",
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"August",
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"September",
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"October",
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"November",
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"December"];
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/**
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* Override these values for international dates, for example...
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* Date.dayNames = ['SundayInYourLang', 'MondayInYourLang', ...];
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*/
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Date.dayNames =
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["Sunday",
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"Monday",
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"Tuesday",
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"Wednesday",
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"Thursday",
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"Friday",
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"Saturday"];
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/** @ignore */
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Date.y2kYear = 50;
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/** @ignore */
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Date.monthNumbers = {
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Jan:0,
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Feb:1,
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Mar:2,
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Apr:3,
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May:4,
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Jun:5,
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Jul:6,
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Aug:7,
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Sep:8,
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Oct:9,
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Nov:10,
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Dec:11};
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