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calendar.js
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calendar.js
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/**
* Module dependencies.
*/
var bind = require('bind')
, domify = require('domify')
, Emitter = require('emitter')
, classes = require('classes')
, template = require('./template')
, Days = require('./days')
, clamp = require('./utils').clamp;
/**
* Expose `Calendar`.
*/
module.exports = Calendar;
/**
* Initialize a new `Calendar`
* with the given `date` defaulting
* to now.
*
* Events:
*
* - `prev` when the prev link is clicked
* - `next` when the next link is clicked
* - `change` (date) when the selected date is modified
*
* @params {Date} date
* @api public
*/
function Calendar(date) {
if (!(this instanceof Calendar)) {
return new Calendar(date);
}
Emitter.call(this);
var self = this;
this.el = domify('<div class=calendar></div>');
this.days = new Days;
this.el.appendChild(this.days.el);
this.on('change', bind(this, this.show));
this.days.on('prev', bind(this, this.prev));
this.days.on('next', bind(this, this.next));
this.days.on('year', bind(this, this.menuChange, 'year'));
this.days.on('month', bind(this, this.menuChange, 'month'));
this.show(date || new Date);
this.days.on('change', function(date){
self.emit('change', date);
});
}
/**
* Mixin emitter.
*/
Emitter(Calendar.prototype);
/**
* Add class `name` to differentiate this
* specific calendar for styling purposes,
* for example `calendar.addClass('date-picker')`.
*
* @param {String} name
* @return {Calendar}
* @api public
*/
Calendar.prototype.addClass = function(name){
classes(this.el).add(name);
return this;
};
/**
* Select `date`.
*
* @param {Date} date
* @return {Calendar}
* @api public
*/
Calendar.prototype.select = function(date){
if (this.days.validRange.valid(date)) {
this.selected = date;
this.days.select(date);
}
this.show(date);
return this;
};
/**
* Show `date`.
*
* @param {Date} date
* @return {Calendar}
* @api public
*/
Calendar.prototype.show = function(date){
this._date = date;
this.days.show(date);
return this;
};
/**
* Set minimum valid date (inclusive)
*
* @param {Date} date
* @api public
*/
Calendar.prototype.min = function(date) {
this.days.validRange.min(date);
return this;
};
/**
* Set maximum valid date (inclusive)
*
* @param {Date} date
* @api public
*/
Calendar.prototype.max = function(date) {
this.days.validRange.max(date);
return this;
};
/**
* Enable a year dropdown.
*
* @param {Number} from
* @param {Number} to
* @return {Calendar}
* @api public
*/
Calendar.prototype.showYearSelect = function(from, to){
from = from || this._date.getFullYear() - 10;
to = to || this._date.getFullYear() + 10;
this.days.yearMenu(from, to);
this.show(this._date);
return this;
};
/**
* Enable a month dropdown.
*
* @return {Calendar}
* @api public
*/
Calendar.prototype.showMonthSelect = function(){
this.days.monthMenu();
this.show(this._date);
return this;
};
/**
* Return the previous month.
*
* @return {Date}
* @api private
*/
Calendar.prototype.prevMonth = function(){
var date = new Date(this._date);
date.setDate(1);
date.setMonth(date.getMonth() - 1);
return date;
};
/**
* Return the next month.
*
* @return {Date}
* @api private
*/
Calendar.prototype.nextMonth = function(){
var date = new Date(this._date);
date.setDate(1);
date.setMonth(date.getMonth() + 1);
return date;
};
/**
* Show the prev view.
*
* @return {Calendar}
* @api public
*/
Calendar.prototype.prev = function(){
this.show(this.prevMonth());
this.emit('view change', this.days.selectedMonth(), 'prev');
return this;
};
/**
* Show the next view.
*
* @return {Calendar}
* @api public
*/
Calendar.prototype.next = function(){
this.show(this.nextMonth());
this.emit('view change', this.days.selectedMonth(), 'next');
return this;
};
/**
* Switch to the year or month selected by dropdown menu.
*
* @return {Calendar}
* @api public
*/
Calendar.prototype.menuChange = function(action){
var date = this.days.selectedMonth();
this.show(date);
this.emit('view change', date, action);
return this;
};