define([
'jquery',
'../utils',
'../keys'
], function ($, Utils, KEYS) {
function Search (decorated, $element, options) {
decorated.call(this, $element, options);
}
Search.prototype.render = function (decorated) {
var $search = $(
'<li class="select2-search select2-search--inline">' +
'<input class="select2-search__field" type="search" tabindex="-1"' +
' autocomplete="off" autocorrect="off" autocapitalize="none"' +
' spellcheck="false" role="searchbox" aria-autocomplete="list" />' +
'</li>'
);
this.$searchContainer = $search;
this.$search = $search.find('input');
var $rendered = decorated.call(this);
this._transferTabIndex();
return $rendered;
};
Search.prototype.bind = function (decorated, container, $container) {
var self = this;
var resultsId = container.id + '-results';
decorated.call(this, container, $container);
container.on('open', function () {
self.$search.attr('aria-controls', resultsId);
self.$search.trigger('focus');
});
container.on('close', function () {
self.$search.val('');
self.$search.removeAttr('aria-controls');
self.$search.removeAttr('aria-activedescendant');
self.$search.trigger('focus');
});
container.on('enable', function () {
self.$search.prop('disabled', false);
self._transferTabIndex();
});
container.on('disable', function () {
self.$search.prop('disabled', true);
});
container.on('focus', function (evt) {
self.$search.trigger('focus');
});
container.on('results:focus', function (params) {
if (params.data._resultId) {
self.$search.attr('aria-activedescendant', params.data._resultId);
} else {
self.$search.removeAttr('aria-activedescendant');
}
});
this.$selection.on('focusin', '.select2-search--inline', function (evt) {
self.trigger('focus', evt);
});
this.$selection.on('focusout', '.select2-search--inline', function (evt) {
self._handleBlur(evt);
});
this.$selection.on('keydown', '.select2-search--inline', function (evt) {
evt.stopPropagation();
self.trigger('keypress', evt);
self._keyUpPrevented = evt.isDefaultPrevented();
var key = evt.which;
if (key === KEYS.BACKSPACE && self.$search.val() === '') {
var $previousChoice = self.$searchContainer
.prev('.select2-selection__choice');
if ($previousChoice.length > 0) {
var item = Utils.GetData($previousChoice[0], 'data');
self.searchRemoveChoice(item);
evt.preventDefault();
}
}
});
this.$selection.on('click', '.select2-search--inline', function (evt) {
if (self.$search.val()) {
evt.stopPropagation();
}
});
// Try to detect the IE version should the `documentMode` property that
// is stored on the document. This is only implemented in IE and is
// slightly cleaner than doing a user agent check.
// This property is not available in Edge, but Edge also doesn't have
// this bug.
var msie = document.documentMode;
var disableInputEvents = msie && msie <= 11;
// Workaround for browsers which do not support the `input` event
// This will prevent double-triggering of events for browsers which support
// both the `keyup` and `input` events.
this.$selection.on(
'input.searchcheck',
'.select2-search--inline',
function (evt) {
// IE will trigger the `input` event when a placeholder is used on a
// search box. To get around this issue, we are forced to ignore all
// `input` events in IE and keep using `keyup`.
if (disableInputEvents) {
self.$selection.off('input.search input.searchcheck');
return;
}
// Unbind the duplicated `keyup` event
self.$selection.off('keyup.search');
}
);
this.$selection.on(
'keyup.search input.search',
'.select2-search--inline',
function (evt) {
// IE will trigger the `input` event when a placeholder is used on a
// search box. To get around this issue, we are forced to ignore all
// `input` events in IE and keep using `keyup`.
if (disableInputEvents && evt.type === 'input') {
self.$selection.off('input.search input.searchcheck');
return;
}
var key = evt.which;
// We can freely ignore events from modifier keys
if (key == KEYS.SHIFT || key == KEYS.CTRL || key == KEYS.ALT) {
return;
}
// Tabbing will be handled during the `keydown` phase
if (key == KEYS.TAB) {
return;
}
self.handleSearch(evt);
}
);
};
/**
* This method will transfer the tabindex attribute from the rendered
* selection to the search box. This allows for the search box to be used as
* the primary focus instead of the selection container.
*
* @private
*/
Search.prototype._transferTabIndex = function (decorated) {
this.$search.attr('tabindex', this.$selection.attr('tabindex'));
this.$selection.attr('tabindex', '-1');
};
Search.prototype.createPlaceholder = function (decorated, placeholder) {
this.$search.attr('placeholder', placeholder.text);
};
Search.prototype.update = function (decorated, data) {
var searchHadFocus = this.$search[0] == document.activeElement;
this.$search.attr('placeholder', '');
decorated.call(this, data);
this.$selection.find('.select2-selection__rendered')
.append(this.$searchContainer);
this.resizeSearch();
if (searchHadFocus) {
this.$search.trigger('focus');
}
};
Search.prototype.handleSearch = function () {
this.resizeSearch();
if (!this._keyUpPrevented) {
var input = this.$search.val();
this.trigger('query', {
term: input
});
}
this._keyUpPrevented = false;
};
Search.prototype.searchRemoveChoice = function (decorated, item) {
this.trigger('unselect', {
data: item
});
this.$search.val(item.text);
this.handleSearch();
};
Search.prototype.resizeSearch = function () {
this.$search.css('width', '25px');
var width = '';
if (this.$search.attr('placeholder') !== '') {
width = this.$selection.find('.select2-selection__rendered').width();
} else {
var minimumWidth = this.$search.val().length + 1;
width = (minimumWidth * 0.75) + 'em';
}
this.$search.css('width', width);
};
return Search;
});
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