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select.js
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select.js
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/**
* A custom <select> menu jQuery plugin
* @example `$('select').idealSelect()`
*/
$.fn.idealSelect = function () {
return this.each(function () {
var
$select = $(this),
$options = $select.find('option')
/**
* Generate markup and return elements of custom select
* @memberOf $.fn.toCustomSelect
* @returns {object} All elements of the new select replacement
*/
var idealSelect = (function () {
var
$wrap = $('<ul class="ideal-select '+ $select.attr('name') +'"/>'),
$menu = $(
'<li><span class="ideal-select-title">' +
$options.filter(':selected').text() +
'</span></li>'
),
items = (function () {
var items = []
$options.each(function () {
var $this = $(this)
items.push('<li class="ideal-select-item">' + $this.text() + '</li>')
})
return items
}())
$menu.append('<ul class="ideal-select-sub">' + items.join('') + '</ul>')
$wrap.append($menu)
return {
select: $wrap,
title: $menu.find('.ideal-select-title'),
sub: $menu.find('.ideal-select-sub'),
items: $menu.find('.ideal-select-item')
}
}())
/**
* @namespace Methods of custom select
* @memberOf $.fn.toCustomSelect
*/
var Actions = {
getSelectedIdx: function () {
return idealSelect.items
.filter('.ideal-select-item-selected').index()
},
/**
* @private
*/
init: (function () {
$select.css({
position: 'absolute',
left: '-9999px'
})
idealSelect.sub.hide()
idealSelect.select.insertAfter($select)
idealSelect.select.css(
'min-width',
Utils.getMaxWidth(idealSelect.items)
)
idealSelect.items
.eq($options.filter(':selected').index())
.addClass('ideal-select-item-selected')
}()),
noWindowScroll: function (e) {
if (e.which === 40 || e.which === 38 || e.which === 13) {
e.preventDefault()
}
},
// Fix loosing focus when scrolling
// and selecting item with keyboard
focusHack: function () {
setTimeout(function () {
$select.trigger('focus')
}, 1)
},
focus: function () {
idealSelect.select.addClass('ideal-select-focus')
$(document).on('keydown.noscroll', Actions.noWindowScroll)
},
blur: function () {
idealSelect.select
.removeClass('ideal-select-open ideal-select-focus')
$(document).off('.noscroll')
},
scrollIntoView: function (dir) {
var
$selected = idealSelect.items.filter('.ideal-select-item-selected'),
itemHeight = idealSelect.items.outerHeight(),
menuHeight = idealSelect.sub.outerHeight(),
isInView = (function () {
// relative position to the submenu
var elPos = $selected.position().top + itemHeight
return dir === 'down'
? elPos <= menuHeight
: elPos > 0
}())
if (!isInView) {
itemHeight = (dir === 'down')
? itemHeight // go down
: -itemHeight // go up
idealSelect.sub
.scrollTop(idealSelect.sub.scrollTop() + itemHeight)
}
},
scrollToItem: function () {
var idx = Actions.getSelectedIdx(),
height = idealSelect.items.outerHeight(),
nItems = idealSelect.items.length,
allHeight = height * nItems,
curHeight = height * (nItems - idx)
idealSelect.sub.scrollTop(allHeight - curHeight)
},
showMenu: function () {
idealSelect.sub.fadeIn('fast')
idealSelect.select.addClass('ideal-select-open')
Actions.select(Actions.getSelectedIdx())
Actions.scrollToItem()
},
hideMenu: function () {
idealSelect.sub.hide()
idealSelect.select.removeClass('ideal-select-open')
},
select: function (idx) {
idealSelect.items
.removeClass('ideal-select-item-selected')
idealSelect.items
.eq(idx).addClass('ideal-select-item-selected')
},
change: function (idx) {
var text = idealSelect.items.eq(idx).text()
Actions.select(idx)
idealSelect.title.text(text)
$options.eq(idx).prop('selected', true)
$select.trigger('change')
},
keydown: function (key) {
var
idx = Actions.getSelectedIdx(),
isMenu = idealSelect.select.is('.ideal-select-menu'),
isOpen = idealSelect.select.is('.ideal-select-open')
/**
* @namespace Key pressed
*/
var keys = {
9: function () { // TAB
if (isMenu) {
Actions.blur()
Actions.hideMenu()
}
},
13: function () { // ENTER
if (isMenu)
isOpen
? Actions.hideMenu()
: Actions.showMenu()
Actions.change(idx)
},
27: function () { // ESC
if (isMenu) Actions.hideMenu()
},
40: function () { // DOWN
if (idx < $options.length - 1) {
isOpen
? Actions.select(idx + 1)
: Actions.change(idx + 1)
}
Actions.scrollIntoView('down')
},
38: function () { // UP
if (idx > 0) {
isOpen
? Actions.select(idx - 1)
: Actions.change(idx - 1)
}
Actions.scrollIntoView('up')
},
'default': function () { // Letter
var
letter = String.fromCharCode(key),
$matches = idealSelect.items
.filter(function () {
var re = new RegExp('^' + letter, 'i')
return re.test($(this).text())
}),
nMatches = $matches.length,
counter = idealSelect.select.data('counter') + 1 || 0,
curKey = idealSelect.select.data('key') || key,
newIdx = $matches.eq(counter).index()
if (!nMatches) // No matches
return false
// If more matches with same letter
if (curKey === key) {
if (counter < nMatches) {
idealSelect.select.data('counter', counter)
}
else {
idealSelect.select.data('counter', 0)
newIdx = $matches.eq(0).index()
}
}
// If new letter
else {
idealSelect.select.data('counter', 0)
newIdx = $matches.eq(0).index()
}
if (isOpen)
Actions.select(newIdx)
else
Actions.change(newIdx)
idealSelect.select.data('key', key)
Actions.scrollToItem()
Actions.focusHack()
}
}
keys[key]
? keys[key]()
: keys['default']()
}
}
/**
* @namespace Holds all events of custom select for "menu mode" and "list mode"
* @memberOf $.fn.toCustomSelect
*/
var events = {
focus: Actions.focus,
'blur.menu': function () {
Actions.blur()
Actions.hideMenu()
},
'blur.list': function () {
Actions.blur()
},
keydown: function (e) {
Actions.keydown(e.which)
},
'clickItem.menu': function () {
Actions.change($(this).index())
Actions.hideMenu()
},
'clickItem.list': function () {
Actions.change($(this).index())
},
'clickTitle.menu': function () {
Actions.focus()
Actions.showMenu()
$select.trigger('focus')
},
'hideOutside.menu': function () {
$select.off('blur.menu')
$(document).on('mousedown.ideal', function (evt) {
if (!$(evt.target).closest(idealSelect.select).length) {
$(document).off('mousedown.ideal')
$select.on('blur.menu', events['blur.menu'])
} else {
Actions.focusHack()
}
})
},
'mousedown.list': function () {
Actions.focusHack()
}
}
// Reset events
var disableEvents = function () {
idealSelect.select.removeClass('ideal-select-menu ideal-select-list')
$select.off('.menu .list')
idealSelect.items.off('.menu .list')
idealSelect.select.off('.menu .list')
idealSelect.title.off('.menu .list')
}
// Menu mode
idealSelect.select.on('menu', function () {
disableEvents()
idealSelect.select.addClass('ideal-select-menu')
Actions.hideMenu()
$select.on({
'blur.menu': events['blur.menu'],
'focus.menu': events.focus,
'keydown.menu': events.keydown
})
idealSelect.select.on('mousedown.menu', events['hideOutside.menu'])
idealSelect.items.on('click.menu', events['clickItem.menu'])
idealSelect.title.on('click.menu', events['clickTitle.menu'])
})
// List mode
idealSelect.select.on('list', function () {
disableEvents()
idealSelect.select.addClass('ideal-select-list')
Actions.showMenu()
$select.on({
'blur.list': events['blur.list'],
'focus.list': events.focus,
'keydown.list': events.keydown
})
idealSelect.select.on('mousedown.list', events['mousedown.list'])
idealSelect.items.on('mousedown.list', events['clickItem.list'])
})
$select.keydown(function (e) {
// Prevent default keydown event
// to avoid bugs with Ideal Select events
if (e.which !== 9) e.preventDefault()
})
// Reset
idealSelect.select.on('reset', function(){
Actions.change(0)
})
idealSelect.select.trigger('menu') // Default to "menu mode"
})
}