TV.So-net Genre-Coloring for AutoPagerize

TV.So-net_Genre-Coloring_for_AutoPagerize.user.js

// ==UserScript==
// @name           TV.So-net Genre-Coloring for AutoPagerize
// @namespace      http://tv.so-net.ne.jp/p/saitamanodoruji/
// @description    This script extends tv.so-net's native color-code function to pages inserted by AutoPagerize.
// @include        http://tv.so-net.ne.jp/*chart*
// @version        0.0.3
// @author         saitamanodoruji
// ==/UserScript==

(function executeGenreColoring(doc) {
	var genres = {
		init: function() {
			var self = this;
			$X("id('genre-color-examles')/li", doc).forEach(function(li) {
				var genreID = /genre-(\d{6})/.exec(li.getAttribute("class"))[1];
				var color = doc.defaultView.getComputedStyle(li, null).getPropertyValue("background-color");
				self[genreID] = {
					checked : false,
					color : color
				}
			});
			self.getChecked();
		},
		getChecked: function() {
			var self = this;
			for (var n in self) {
				if (typeof(self[n]) != 'function') self[n].checked = false;
			}
			if ( doc.cookie.match(/gtv\.checkedGenreIds=\[([0-9,]*)\]/)) {
				RegExp.$1.split(",").forEach(function(genreID) {
					self[genreID].checked = true;
				});
			} else {
				$X("id('chart-footer-genres')/li/label/input", doc).forEach(function(n) {
					if ( n.checked ) self[n.value].checked = true;
				});
			}
		}
	}

	var setColors = function(genres, evtNode) {
		var re = /cell-genre-(\d{3}0{3})/;
		$X(".//*[contains(concat(' ', @class, ' '), ' cell-schedule ')]", evtNode).forEach(function (n) {
			if ( n.nodeType == 1 && n.getAttribute("class").match(re) && genres[RegExp.$1].checked ) {
				n.style.backgroundColor = genres[RegExp.$1].color;
			} else {
				n.style.backgroundColor = "rgb(245, 245, 245)";
			}
		});
	}

	genres.init();

	doc.body.addEventListener("AutoPagerize_DOMNodeInserted", function(event) {
		setColors(genres, event.target);
	}, false);

	$X("id('chart-footer-genres')/li/label/input", doc).forEach(function(n) {
		n.addEventListener("change", function() {
			genres.getChecked();
			setColors(genres, doc);
		}, false);
	});

// simple version of $X
// $X(exp);
// $X(exp, context);
// @source http://gist.github.com/3242.txt
function $X (exp, context) {
	context || (context = document);
	var expr = (context.ownerDocument || context).createExpression(exp, function (prefix) {
		return document.createNSResolver(context.documentElement || context).lookupNamespaceURI(prefix) ||
			context.namespaceURI || document.documentElement.namespaceURI || "";
	});

	var result = expr.evaluate(context, XPathResult.ANY_TYPE, null);
		switch (result.resultType) {
			case XPathResult.STRING_TYPE : return result.stringValue;
			case XPathResult.NUMBER_TYPE : return result.numberValue;
			case XPathResult.BOOLEAN_TYPE: return result.booleanValue;
			case XPathResult.UNORDERED_NODE_ITERATOR_TYPE:
				// not ensure the order.
				var ret = [], i = null;
				while (i = result.iterateNext()) ret.push(i);
				return ret;
		}
	return null;
}

})(document);