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/**
 * CssSelectorGenerator
 */
(function () {
	var CssSelectorGenerator, root,
		indexOf = [].indexOf || function (item) {
			for (var i = 0, l = this.length; i < l; i++) {
				if (i in this && this[i] === item) return i;
			}
			return -1;
		};

CssSelectorGenerator = (function () {
		CssSelectorGenerator.prototype.default_options = {
			selectors: ['id', 'class', 'tag', 'nthchild']
		};

function CssSelectorGenerator(options) {
			if (options == null) {
				options = {};
			}
			this.options = {};
			this.setOptions(this.default_options);
			this.setOptions(options);
		}

CssSelectorGenerator.prototype.setOptions = function (options) {
			var key, results, val;
			if (options == null) {
				options = {};
			}
			results = [];
			for (key in options) {
				val = options[key];
				if (this.default_options.hasOwnProperty(key)) {
					results.push(this.options[key] = val);
				} else {
					results.push(void 0);
				}
			}
			return results;
		};

CssSelectorGenerator.prototype.isElement = function (element) {
			return !!((element != null ? element.nodeType : void 0) === 1);
		};

CssSelectorGenerator.prototype.getParents = function (element) {
			var current_element, result;
			result = [];
			if (this.isElement(element)) {
				current_element = element;
				while (this.isElement(current_element)) {
					result.push(current_element);
					current_element = current_element.parentNode;
				}
			}
			return result;
		};

CssSelectorGenerator.prototype.getTagSelector = function (element) {
			return this.sanitizeItem(element.tagName.toLowerCase());
		};

CssSelectorGenerator.prototype.sanitizeItem = function (item) {
			var characters;
			characters = (item.split('')).map(function (character) {
				if (character === ':') {
					return "\\" + (':'.charCodeAt(0).toString(16).toUpperCase()) + " ";
				} else if (/[ !"#$%&'()*+,.\/;<=>?@\[\\\]^`{|}~]/.test(character)) {
					return "\\" + character;
				} else {
					return escape(character).replace(/\%/g, '\\');
				}
			});
			return characters.join('');
		};

CssSelectorGenerator.prototype.getIdSelector = function (element) {
			var id, sanitized_id;
			id = element.getAttribute('id');
			if ((id != null) && (id !== '') && !(/\s/.exec(id)) && !(/^\d/.exec(id))) {
				sanitized_id = "#" + (this.sanitizeItem(id));
				if (element.ownerDocument.querySelectorAll(sanitized_id).length === 1) {
					return sanitized_id;
				}
			}
			return null;
		};

CssSelectorGenerator.prototype.getClassSelectors = function (element) {
			var class_string, item, result;
			result = [];
			class_string = element.getAttribute('class');
			if (class_string != null) {
				class_string = class_string.replace(/\s+/g, ' ');
				class_string = class_string.replace(/^\s|\s$/g, '');
				if (class_string !== '') {
					result = (function () {
						var k, len, ref, results;
						ref = class_string.split(/\s+/);
						results = [];
						for (k = 0, len = ref.length; k < len; k++) {
							item = ref[k];
							results.push("." + (this.sanitizeItem(item)));
						}
						return results;
					}).call(this);
				}
			}
			return result;
		};

CssSelectorGenerator.prototype.getAttributeSelectors = function (element) {
			var attribute, blacklist, k, len, ref, ref1, result;
			result = [];
			blacklist = ['id', 'class'];
			ref = element.attributes;
			for (k = 0, len = ref.length; k < len; k++) {
				attribute = ref[k];
				if (ref1 = attribute.nodeName, indexOf.call(blacklist, ref1) < 0) {
					result.push("[" + attribute.nodeName + "=" + attribute.nodeValue + "]");
				}
			}
			return result;
		};

CssSelectorGenerator.prototype.getNthChildSelector = function (element) {
			var counter, k, len, parent_element, sibling, siblings;
			parent_element = element.parentNode;
			if (parent_element != null) {
				counter = 0;
				siblings = parent_element.childNodes;
				for (k = 0, len = siblings.length; k < len; k++) {
					sibling = siblings[k];
					if (this.isElement(sibling)) {
						counter++;
						if (sibling === element) {
							return ":nth-child(" + counter + ")";
						}
					}
				}
			}
			return null;
		};

CssSelectorGenerator.prototype.testSelector = function (element, selector) {
			var is_unique, result;
			is_unique = false;
			if ((selector != null) && selector !== '') {
				result = element.ownerDocument.querySelectorAll(selector);
				if (result.length === 1 && result[0] === element) {
					is_unique = true;
				}
			}
			return is_unique;
		};

CssSelectorGenerator.prototype.getAllSelectors = function (element) {
			var result;
			result = {
				t: null,
				i: null,
				c: null,
				a: null,
				n: null
			};
			if (indexOf.call(this.options.selectors, 'tag') >= 0) {
				result.t = this.getTagSelector(element);
			}
			if (indexOf.call(this.options.selectors, 'id') >= 0) {
				result.i = this.getIdSelector(element);
			}
			if (indexOf.call(this.options.selectors, 'class') >= 0) {
				result.c = this.getClassSelectors(element);
			}
			if (indexOf.call(this.options.selectors, 'attribute') >= 0) {
				result.a = this.getAttributeSelectors(element);
			}
			if (indexOf.call(this.options.selectors, 'nthchild') >= 0) {
				result.n = this.getNthChildSelector(element);
			}
			return result;
		};

CssSelectorGenerator.prototype.testUniqueness = function (element, selector) {
			var found_elements, parent;
			parent = element.parentNode;
			found_elements = parent.querySelectorAll(selector);
			return found_elements.length === 1 && found_elements[0] === element;
		};

CssSelectorGenerator.prototype.testCombinations = function (element, items, tag) {
			var item, k, l, len, len1, ref, ref1;
			ref = this.getCombinations(items);
			for (k = 0, len = ref.length; k < len; k++) {
				item = ref[k];
				if (this.testUniqueness(element, item)) {
					return item;
				}
			}
			if (tag != null) {
				ref1 = items.map(function (item) {
					return tag + item;
				});
				for (l = 0, len1 = ref1.length; l < len1; l++) {
					item = ref1[l];
					if (this.testUniqueness(element, item)) {
						return item;
					}
				}
			}
			return null;
		};

CssSelectorGenerator.prototype.getUniqueSelector = function (element) {
			var found_selector, k, len, ref, selector_type, selectors;
			selectors = this.getAllSelectors(element);
			ref = this.options.selectors;
			for (k = 0, len = ref.length; k < len; k++) {
				selector_type = ref[k];
				switch (selector_type) {
					case 'id':
						if (selectors.i != null) {
							return selectors.i;
						}
						break;
					case 'tag':
						if (selectors.t != null) {
							if (this.testUniqueness(element, selectors.t)) {
								return selectors.t;
							}
						}
						break;
					case 'class':
						if ((selectors.c != null) && selectors.c.length !== 0) {
							found_selector = this.testCombinations(element, selectors.c, selectors.t);
							if (found_selector) {
								return found_selector;
							}
						}
						break;
					case 'attribute':
						if ((selectors.a != null) && selectors.a.length !== 0) {
							found_selector = this.testCombinations(element, selectors.a, selectors.t);
							if (found_selector) {
								return found_selector;
							}
						}
						break;
					case 'nthchild':
						if (selectors.n != null) {
							return selectors.n;
						}
				}
			}
			return '*';
		};

CssSelectorGenerator.prototype.getSelector = function (element) {
			var all_selectors, item, k, l, len, len1, parents, result, selector, selectors;
			all_selectors = [];
			parents = this.getParents(element);
			for (k = 0, len = parents.length; k < len; k++) {
				item = parents[k];
				selector = this.getUniqueSelector(item);
				if (selector != null) {
					all_selectors.push(selector);
				}
			}
			selectors = [];
			for (l = 0, len1 = all_selectors.length; l < len1; l++) {
				item = all_selectors[l];
				selectors.unshift(item);
				result = selectors.join(' > ');
				if (this.testSelector(element, result)) {
					return result;
				}
			}
			return null;
		};

CssSelectorGenerator.prototype.getCombinations = function (items) {
			var i, j, k, l, ref, ref1, result;
			if (items == null) {
				items = [];
			}
			result = [[]];
			for (i = k = 0, ref = items.length - 1; 0 <= ref ? k <= ref : k >= ref; i = 0 <= ref ? ++k : --k) {
				for (j = l = 0, ref1 = result.length - 1; 0 <= ref1 ? l <= ref1 : l >= ref1; j = 0 <= ref1 ? ++l : --l) {
					result.push(result[j].concat(items[i]));
				}
			}
			result.shift();
			result = result.sort(function (a, b) {
				return a.length - b.length;
			});
			result = result.map(function (item) {
				return item.join('');
			});
			return result;
		};

return CssSelectorGenerator;

})();

if (typeof define !== "undefined" && define !== null ? define.amd : void 0) {
		define([], function () {
			return CssSelectorGenerator;
		});
	} else {
		root = typeof exports !== "undefined" && exports !== null ? exports : this;
		root.CssSelectorGenerator = CssSelectorGenerator;
	}

}).call(this);

(function ($) {
	var selector_generator = new CssSelectorGenerator;
	var pumAdminBarText = pumAdminBarText || {
		instructions: 'After clicking ok, click the element you want a selector for.',
		results: 'Selector'
	};

$(document).on('click', '#wp-admin-bar-pum-get-selector', function (event) {

alert(pumAdminBarText.instructions);

event.preventDefault();
		event.stopPropagation();

$(document).one('click', function (event) {
			// get reference to the element user clicked on
			var element = event.target,
				// get unique CSS selector for that element
				selector = selector_generator.getSelector(element);

alert( pumAdminBarText.results + ": " + selector);

event.preventDefault();
			event.stopPropagation();
		});
	});
}(jQuery));