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Direktori : /home/medipszd/www/bower_components/select2/src/js/select2/dropdown/ |
Current File : //home/medipszd/www/bower_components/select2/src/js/select2/dropdown/attachBody.js |
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; var setupResultsEvents = false; decorated.call(this, container, $container); container.on('open', function () { self._showDropdown(); self._attachPositioningHandler(container); if (!setupResultsEvents) { setupResultsEvents = true; container.on('results:all', function () { self._positionDropdown(); self._resizeDropdown(); }); container.on('results:append', function () { self._positionDropdown(); self._resizeDropdown(); }); } }); container.on('close', function () { self._hideDropdown(); self._detachPositioningHandler(container); }); this.$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._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 () { $(this).data('select2-scroll-position', { x: $(this).scrollLeft(), y: $(this).scrollTop() }); }); $watchers.on(scrollEvent, function (ev) { var position = $(this).data('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 calciulating the offset var $offsetParent = this.$dropdownParent; // For statically positoned elements, we need to get the element // that is determining the offset if ($offsetParent.css('position') === 'static') { $offsetParent = $offsetParent.offsetParent(); } var 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; });