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libraries/selectize/plugins/restore_on_backspace/plugin.js

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+/**
+ * Plugin: "restore_on_backspace" (selectize.js)
+ * Copyright (c) 2013 Brian Reavis & contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the License at:
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+ * ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ *
+ * @author Brian Reavis <brian@thirdroute.com>
+ */
+
+Selectize.define('restore_on_backspace', function(options) {
+	var self = this;
+
+	options.text = options.text || function(option) {
+		return option[this.settings.labelField];
+	};
+
+	this.onKeyDown = (function() {
+		var original = self.onKeyDown;
+		return function(e) {
+			var index, option;
+			if (e.keyCode === KEY_BACKSPACE && this.$control_input.val() === '' && !this.$activeItems.length) {
+				index = this.caretPos - 1;
+				if (index >= 0 && index < this.items.length) {
+					option = this.options[this.items[index]];
+					if (this.deleteSelection(e)) {
+						this.setTextboxValue(options.text.apply(this, [option]));
+						this.refreshOptions(true);
+					}
+					e.preventDefault();
+					return;
+				}
+			}
+			return original.apply(this, arguments);
+		};
+	})();
+});