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Mini Shell
define([
'jquery',
'../utils'
], function ($, Utils) {
function AttachBody (decorated, $element, options) {
this.$dropdownParent = $(options.get('dropdownParent') || document.body);
decorated.call(this, $element, options);
}
AttachBody.prototype.bind = function (decorated, container, $container) {
var self = this;
decorated.call(this, container, $container);
container.on('open', function () {
self._showDropdown();
self._attachPositioningHandler(container);
// Must bind after the results handlers to ensure correct sizing
self._bindContainerResultHandlers(container);
});
container.on('close', function () {
self._hideDropdown();
self._detachPositioningHandler(container);
});
this.$dropdownContainer.on('mousedown', function (evt) {
evt.stopPropagation();
});
};
AttachBody.prototype.destroy = function (decorated) {
decorated.call(this);
this.$dropdownContainer.remove();
};
AttachBody.prototype.position = function (decorated, $dropdown, $container) {
// Clone all of the container classes
$dropdown.attr('class', $container.attr('class'));
$dropdown.removeClass('select2');
$dropdown.addClass('select2-container--open');
$dropdown.css({
position: 'absolute',
top: -999999
});
this.$container = $container;
};
AttachBody.prototype.render = function (decorated) {
var $container = $('<span></span>');
var $dropdown = decorated.call(this);
$container.append($dropdown);
this.$dropdownContainer = $container;
return $container;
};
AttachBody.prototype._hideDropdown = function (decorated) {
this.$dropdownContainer.detach();
};
AttachBody.prototype._bindContainerResultHandlers =
function (decorated, container) {
// These should only be bound once
if (this._containerResultsHandlersBound) {
return;
}
var self = this;
container.on('results:all', function () {
self._positionDropdown();
self._resizeDropdown();
});
container.on('results:append', function () {
self._positionDropdown();
self._resizeDropdown();
});
container.on('results:message', function () {
self._positionDropdown();
self._resizeDropdown();
});
container.on('select', function () {
self._positionDropdown();
self._resizeDropdown();
});
container.on('unselect', function () {
self._positionDropdown();
self._resizeDropdown();
});
this._containerResultsHandlersBound = true;
};
AttachBody.prototype._attachPositioningHandler =
function (decorated, container) {
var self = this;
var scrollEvent = 'scroll.select2.' + container.id;
var resizeEvent = 'resize.select2.' + container.id;
var orientationEvent = 'orientationchange.select2.' + container.id;
var $watchers = this.$container.parents().filter(Utils.hasScroll);
$watchers.each(function () {
Utils.StoreData(this, 'select2-scroll-position', {
x: $(this).scrollLeft(),
y: $(this).scrollTop()
});
});
$watchers.on(scrollEvent, function (ev) {
var position = Utils.GetData(this, 'select2-scroll-position');
$(this).scrollTop(position.y);
});
$(window).on(scrollEvent + ' ' + resizeEvent + ' ' + orientationEvent,
function (e) {
self._positionDropdown();
self._resizeDropdown();
});
};
AttachBody.prototype._detachPositioningHandler =
function (decorated, container) {
var scrollEvent = 'scroll.select2.' + container.id;
var resizeEvent = 'resize.select2.' + container.id;
var orientationEvent = 'orientationchange.select2.' + container.id;
var $watchers = this.$container.parents().filter(Utils.hasScroll);
$watchers.off(scrollEvent);
$(window).off(scrollEvent + ' ' + resizeEvent + ' ' + orientationEvent);
};
AttachBody.prototype._positionDropdown = function () {
var $window = $(window);
var isCurrentlyAbove = this.$dropdown.hasClass('select2-dropdown--above');
var isCurrentlyBelow = this.$dropdown.hasClass('select2-dropdown--below');
var newDirection = null;
var offset = this.$container.offset();
offset.bottom = offset.top + this.$container.outerHeight(false);
var container = {
height: this.$container.outerHeight(false)
};
container.top = offset.top;
container.bottom = offset.top + container.height;
var dropdown = {
height: this.$dropdown.outerHeight(false)
};
var viewport = {
top: $window.scrollTop(),
bottom: $window.scrollTop() + $window.height()
};
var enoughRoomAbove = viewport.top < (offset.top - dropdown.height);
var enoughRoomBelow = viewport.bottom > (offset.bottom + dropdown.height);
var css = {
left: offset.left,
top: container.bottom
};
// Determine what the parent element is to use for calculating the offset
var $offsetParent = this.$dropdownParent;
// For statically positioned elements, we need to get the element
// that is determining the offset
if ($offsetParent.css('position') === 'static') {
$offsetParent = $offsetParent.offsetParent();
}
var parentOffset = {
top: 0,
left: 0
};
if (
$.contains(document.body, $offsetParent[0]) ||
$offsetParent[0].isConnected
) {
parentOffset = $offsetParent.offset();
}
css.top -= parentOffset.top;
css.left -= parentOffset.left;
if (!isCurrentlyAbove && !isCurrentlyBelow) {
newDirection = 'below';
}
if (!enoughRoomBelow && enoughRoomAbove && !isCurrentlyAbove) {
newDirection = 'above';
} else if (!enoughRoomAbove && enoughRoomBelow && isCurrentlyAbove) {
newDirection = 'below';
}
if (newDirection == 'above' ||
(isCurrentlyAbove && newDirection !== 'below')) {
css.top = container.top - parentOffset.top - dropdown.height;
}
if (newDirection != null) {
this.$dropdown
.removeClass('select2-dropdown--below select2-dropdown--above')
.addClass('select2-dropdown--' + newDirection);
this.$container
.removeClass('select2-container--below select2-container--above')
.addClass('select2-container--' + newDirection);
}
this.$dropdownContainer.css(css);
};
AttachBody.prototype._resizeDropdown = function () {
var css = {
width: this.$container.outerWidth(false) + 'px'
};
if (this.options.get('dropdownAutoWidth')) {
css.minWidth = css.width;
css.position = 'relative';
css.width = 'auto';
}
this.$dropdown.css(css);
};
AttachBody.prototype._showDropdown = function (decorated) {
this.$dropdownContainer.appendTo(this.$dropdownParent);
this._positionDropdown();
this._resizeDropdown();
};
return AttachBody;
});
Zerion Mini Shell 1.0