// Core javascript helper functions 'use strict'; // quickElement(tagType, parentReference [, textInChildNode, attribute, attributeValue ...]); function quickElement() { const obj = document.createElement(arguments[0]); if (arguments[2]) { const textNode = document.createTextNode(arguments[2]); obj.appendChild(textNode); } const len = arguments.length; for (let i = 3; i < len; i += 2) { obj.setAttribute(arguments[i], arguments[i + 1]); } arguments[1].appendChild(obj); return obj; } // "a" is reference to an object function removeChildren(a) { while (a.hasChildNodes()) { a.removeChild(a.lastChild); } } // ---------------------------------------------------------------------------- // Find-position functions by PPK // See https://www.quirksmode.org/js/findpos.html // ---------------------------------------------------------------------------- function findPosX(obj) { let curleft = 0; if (obj.offsetParent) { while (obj.offsetParent) { curleft += obj.offsetLeft - obj.scrollLeft; obj = obj.offsetParent; } } else if (obj.x) { curleft += obj.x; } return curleft; } function findPosY(obj) { let curtop = 0; if (obj.offsetParent) { while (obj.offsetParent) { curtop += obj.offsetTop - obj.scrollTop; obj = obj.offsetParent; } } else if (obj.y) { curtop += obj.y; } return curtop; } //----------------------------------------------------------------------------- // Date object extensions // ---------------------------------------------------------------------------- { Date.prototype.getTwelveHours = function() { return this.getHours() % 12 || 12; }; Date.prototype.getTwoDigitMonth = function() { return (this.getMonth() < 9) ? '0' + (this.getMonth() + 1) : (this.getMonth() + 1); }; Date.prototype.getTwoDigitDate = function() { return (this.getDate() < 10) ? '0' + this.getDate() : this.getDate(); }; Date.prototype.getTwoDigitTwelveHour = function() { return (this.getTwelveHours() < 10) ? '0' + this.getTwelveHours() : this.getTwelveHours(); }; Date.prototype.getTwoDigitHour = function() { return (this.getHours() < 10) ? '0' + this.getHours() : this.getHours(); }; Date.prototype.getTwoDigitMinute = function() { return (this.getMinutes() < 10) ? '0' + this.getMinutes() : this.getMinutes(); }; Date.prototype.getTwoDigitSecond = function() { return (this.getSeconds() < 10) ? '0' + this.getSeconds() : this.getSeconds(); }; Date.prototype.getFullMonthName = function() { return typeof window.CalendarNamespace === "undefined" ? this.getTwoDigitMonth() : window.CalendarNamespace.monthsOfYear[this.getMonth()]; }; Date.prototype.strftime = function(format) { const fields = { B: this.getFullMonthName(), c: this.toString(), d: this.getTwoDigitDate(), H: this.getTwoDigitHour(), I: this.getTwoDigitTwelveHour(), m: this.getTwoDigitMonth(), M: this.getTwoDigitMinute(), p: (this.getHours() >= 12) ? 'PM' : 'AM', S: this.getTwoDigitSecond(), w: '0' + this.getDay(), x: this.toLocaleDateString(), X: this.toLocaleTimeString(), y: ('' + this.getFullYear()).substr(2, 4), Y: '' + this.getFullYear(), '%': '%' }; let result = '', i = 0; while (i < format.length) { if (format.charAt(i) === '%') { result = result + fields[format.charAt(i + 1)]; ++i; } else { result = result + format.charAt(i); } ++i; } return result; }; // ---------------------------------------------------------------------------- // String object extensions // ---------------------------------------------------------------------------- String.prototype.strptime = function(format) { const split_format = format.split(/[.\-/]/); const date = this.split(/[.\-/]/); let i = 0; let day, month, year; while (i < split_format.length) { switch (split_format[i]) { case "%d": day = date[i]; break; case "%m": month = date[i] - 1; break; case "%Y": year = date[i]; break; case "%y": // A %y value in the range of [00, 68] is in the current // century, while [69, 99] is in the previous century, // according to the Open Group Specification. if (parseInt(date[i], 10) >= 69) { year = date[i]; } else { year = (new Date(Date.UTC(date[i], 0))).getUTCFullYear() + 100; } break; } ++i; } // Create Date object from UTC since the parsed value is supposed to be // in UTC, not local time. Also, the calendar uses UTC functions for // date extraction. return new Date(Date.UTC(year, month, day)); }; }