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/*
* Calendar math built on jquery-global
*
* Based on Marc Grabanski's jQuery Date Plugin
* http://marcgrabanski.com/articles/jquery-date-plugin
*/
(function( $, undefined ) {
var weekdays = [ "sun", "mon", "tue", "wed", "thu", "fri", "sat" ],
weekdaysRev = {
"sun": 0,
"mon": 1,
"tue": 2,
"wed": 3,
"thu": 4,
"fri": 5,
"sat": 6
};
Globalize.locale( "en" );
$.date = function( date, globalFormat ) {
if ( !( this instanceof $.date ) ) {
return new $.date( date, globalFormat );
}
if ( typeof date === "string" && date.length ) {
this.dateObject = Globalize.parseDate( date, globalFormat );
}
this.dateObject = this.dateObject || new Date();
this.globalFormat = globalFormat;
};
$.date.prototype = {
setFormat: function( format ) {
if ( format ) {
this.globalFormat = format;
}
return this;
},
//TODO: same as the underlying Date object's terminology, but still misleading.
//TODO: We can use .setTime() instead of new Date and rename to setTimestamp.
setTime: function( time ) {
this.dateObject = new Date( time );
return this;
},
setDay: function( day ) {
var date = this.dateObject;
this.dateObject = new Date( date.getFullYear(), date.getMonth(), day, date.getHours(),
date.getMinutes(), date.getSeconds() );
return this;
},
setMonth: function( month ) {
// Overflow example: Month is October 31 (yeah Halloween) and month is changed to April with 30 days,
// the new date will me May 1. We will honor the month the user wants to set and if and overflow
// occurs, set to last day of month.
var date = this.dateObject,
days = date.getDay(), year = date.getFullYear();
if ( days > this.daysInMonth( year, month ) ) {
// Overflow
days = this.daysInMonth( year, month );
}
this.dateObject = new Date( year, month, days, date.getHours(),
date.getMinutes(), date.getSeconds() );
return this;
},
setYear: function( year ) {
var date = this.dateObject,
day = date.getDate(),
month = date.getMonth();
// Check if Leap, and February and day is 29th
if ( this.isLeapYear( year ) && month == 1 && day == 29 ) {
// set day to last day of February
day = this.daysInMonth( year, month );
}
this.dateObject = new Date( year, month, day, date.getHours(),
date.getMinutes(), date.getSeconds() );
return this;
},
setFullDate: function( year, month, day ) {
this.dateObject = new Date( year, month, day );
return this;
},
adjust: function( period, offset ) {
var date = this.dateObject,
day = period == "D" ? date.getDate() + offset : date.getDate(),
month = period == "M" ? date.getMonth() + offset : date.getMonth(),
year = period == "Y" ? date.getFullYear() + offset : date.getFullYear();
// If not day, update the day to the new month and year
if ( period != "D" ) {
day = Math.max( 1, Math.min( day, this.daysInMonth( year, month ) ) );
}
this.dateObject = new Date( year, month, day, date.getHours(),
date.getMinutes(), date.getSeconds() );
return this;
},
daysInMonth: function( year, month ) {
var date = this.dateObject;
year = year || date.getFullYear();
month = month || date.getMonth();
return 32 - new Date( year, month, 32 ).getDate();
},
monthName: function() {
return Globalize.format( this.dateObject, { pattern: "MMMM" } );
},
day: function() {
return this.dateObject.getDate();
},
month: function() {
return this.dateObject.getMonth();
},
year: function() {
return this.dateObject.getFullYear();
},
isLeapYear: function( year ) {
year = year || this.dateObject.getFullYear();
return new Date( year, 1, 29 ).getMonth() == 1;
},
weekdays: function() {
var result = [];
for ( var dow = 0; dow < 7; dow++ ) {
var day = ( dow + weekdaysRev[ Globalize.locale().supplemental.weekData.firstDay() ] ) % 7;
result.push({
shortname: Globalize.locale().main([ "dates/calendars/gregorian/days/format/abbreviated", weekdays[ day ] ]),
fullname: Globalize.locale().main([ "dates/calendars/gregorian/days/format/wide", weekdays[ day ] ]),
});
}
return result;
},
days: function() {
var result = [],
today = $.date(),
date = this.dateObject,
firstDayOfMonth = new Date( this.year(), date.getMonth(), 1 ).getDay(),
leadDays = ( firstDayOfMonth - weekdaysRev[ Globalize.locale().supplemental.weekData.firstDay() ] + 7 ) % 7,
rows = Math.ceil( ( leadDays + this.daysInMonth() ) / 7 ),
printDate = new Date( this.year(), date.getMonth(), 1 - leadDays );
for ( var row = 0; row < rows; row++ ) {
var week = result[ result.length ] = {
number: Globalize.format( printDate, { pattern: "w" } ),
days: []
};
for ( var dayx = 0; dayx < 7; dayx++ ) {
var day = week.days[ week.days.length ] = {
lead: printDate.getMonth() != date.getMonth(),
date: printDate.getDate(),
timestamp: printDate.getTime(),
current: this.selected && this.selected.equal( printDate ),
today: today.equal( printDate )
};
day.render = day.selectable = !day.lead;
if ( this.eachDay ) {
this.eachDay( day );
}
// TODO use adjust("D", 1)?
printDate.setDate( printDate.getDate() + 1 );
}
}
return result;
},
// specialized for multi-month template, could be used in general
months: function( add ) {
var clone,
result = [ this ];
for ( var i = 0; i < add; i++ ) {
clone = this.clone();
clone.adjust( "M", i + 1 );
result.push( clone );
}
result[ 0 ].first = true;
result[ result.length - 1 ].last = true;
return result;
},
select: function() {
this.selected = this.clone();
return this;
},
clone: function() {
var date = this.dateObject;
return new $.date( new Date( date.getFullYear(), date.getMonth(),
date.getDate(), date.getHours(),
date.getMinutes(), date.getSeconds()), this.globalFormat );
},
// TODO compare year, month, day each for better performance
equal: function( other ) {
function format( date ) {
return Globalize.format( date, { pattern: "yyyyMMdd" } );
}
return format( this.dateObject ) === format( other );
},
date: function() {
return this.dateObject;
},
format: function( format ) {
return Globalize.format( this.dateObject, format || this.globalFormat );
}
};
}( jQuery ));
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