/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/1.3/dateUtils.js is in qml-module-ubuntu-components-gles 1.3.1918+16.04.20160404-0ubuntu3.
This file is owned by root:root, with mode 0o644.
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* Copyright 2013-2015 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*!
\qmltype dateUtils
\inqmlmodule Ubuntu.Components 1.3
\ingroup ubuntu
\brief Various date utility functions.
*/
.pragma library
/*
Extending Date with few prototypes
*/
Date.msPerDay = 86400e3
Date.msPerWeek = Date.msPerDay * 7
/*!
\qmlmethod Date::midnight()
The function returns a Date object with the current date and hour set to
midnight.
*/
Date.prototype.midnight = function() {
this.setHours(0, 0, 0, 0);
return this;
}
/*!
\qmlmethod Date::getInvalidDate()
The function returns an invalid date object.
Example of use:
\code
var invalidDate = Date.prototype.getInvalidDate.call();
var otherInvalidDate = (new Date()).getInvalidDate();
\endcode
*/
Date.prototype.getInvalidDate = function() {
return new Date(-1, -1);
}
/*!
\qmlmethod Date::isValid()
The function checks whether the date object is a valid one, meaning the year,
month and date fields are positive numbers
*/
Date.prototype.isValid = function() {
if (Object.prototype.toString.call(this) !== "[object Date]") {
return false;
}
return (this.getFullYear() > 0) && (this.getMonth() >= 0) && (this.getDate() > 0);
}
/*!
\qmlmethod Date::daysInMonth()
The function returns the number of days in the month set in the Date object.
*/
Date.prototype.daysInMonth = function() {
return [
31/*an*/, 28/*Feb*/, 31/*Mar*/, 30/*Apr*/, 31/*May*/, 30/*Jun*/,
31/*Jul*/, 31/*Aug*/, 30/*Sep*/, 31/*Oct*/, 30/*Nov*/, 31/*Dec*/
][this.getMonth()] + (this.getMonth() === 1) * this.leapYear();
}
/*!
\qmlmethod Date::leapYear()
The function checks whether the year in the Date object is a leap year or not.
*/
Date.prototype.leapYear = function() {
var year = this.getFullYear();
return year % 400 == 0 || (year % 100 !== 0 && year % 4 == 0);
}
/*!
\qmlmethod Date::monthsTo(date)
The function returns the distance in months (not calendaristic months) between
the Date object and the given one as parameter.
*/
Date.prototype.monthsTo = function(target) {
return target.getMonth() - this.getMonth() + (12 * (target.getFullYear() - this.getFullYear()));
}
/*!
\qmlmethod Date::daysTo(date)
Same as monthsTo, but returns the distance in days.
*/
Date.prototype.daysTo = function(target) {
return !target.isValid() ? 0 : Math.ceil((target - this) / Date.msPerDay);
}
/*!
\qmlmethod Date::hoursTo(date)
Same as monthsTo, but returns the distance in hours.
*/
Date.prototype.hoursTo = function(target) {
return !target.isValid() ? 0 : Math.ceil((target.getTime() - this.getTime()) / (1000 * 60 * 60));
}
/*!
\qmlmethod Date::minutesTo(date)
Same as monthsTo, but returns the distance in minutes.
*/
Date.prototype.minutesTo = function(target) {
return !target.isValid() ? 0 : Math.ceil((target.getTime() - this.getTime()) / (1000 * 60));
}
/*!
\qmlmethod Date::secondsTo(date)
Same as monthsTo, but returns the distance in seconds.
*/
Date.prototype.secondsTo = function(target) {
return !target.isValid() ? 0 : Math.ceil((target.getTime() - this.getTime()) / 1000);
}
/*!
\qmlmethod Date::getWeek()
The function returns the week number of the date stored in the object.
*/
Date.prototype.getWeek = function() {
// Copy date so don't modify original
var date = new Date(this);
date.setHours(0, 0, 0, 0);
// Set to nearest Thursday: current date + 4 - current day number
// Make Sunday's day number 7
date.setDate(date.getDate() + 4 - (date.getDay() || 7));
// Get first day of year
var yearStart = new Date(date.getFullYear(), 0, 1);
// Calculate full weeks to nearest Thursday
var weekNo = Math.ceil((((date - yearStart) / 86400000) + 1) / 7);
// Return array of year and week number
return weekNo;
}
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