はてなサービス間の移動リンク

hatena_service_link.user.js

// ==UserScript==
// @name           hatena service link
// @namespace      http://mattn.kaoriya.net/
// @description    hatena service link
// @include        http://*.hatena.ne.jp/*
// ==/UserScript==

(function() {
	// http://gist.github.com/raw/3238/dollarX.js

	// extend version of $X
	// $X(exp);
	// $X(exp, context);
	// $X(exp, type);
	// $X(exp, context, type);
	function $X (exp, context, type /* want type */) {
		if (typeof context == "function") {
			type    = context;
			context = null;
		}
		if (!context) context = document;
		exp = (context.ownerDocument || context).createExpression(exp, function (prefix) {
			var o = document.createNSResolver(context)(prefix);
			if (o) return o;
			return (document.contentType == "application/xhtml+xml") ? "http://www.w3.org/1999/xhtml" : "";
		});

		switch (type) {
			case String:  return exp.evaluate(context, XPathResult.STRING_TYPE, null).stringValue;
			case Number:  return exp.evaluate(context, XPathResult.NUMBER_TYPE, null).numberValue;
			case Boolean: return exp.evaluate(context, XPathResult.BOOLEAN_TYPE, null).booleanValue;
			case Array:
				var result = exp.evaluate(context, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
				for (var ret = [], i = 0, len = result.snapshotLength; i < len; i++) {
					ret.push(result.snapshotItem(i));
				}
				return ret;
			case undefined:
				var result = exp.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;
			default: throw(TypeError("$X: specified type is not valid type."));
		}
	}

	const services = [{ letter: 'a', title: 'アンテナ' }, { letter: 'b', title: 'ブックマーク' }, { letter: 'c', title: 'ココ' }, { letter: 'd', title: 'ダイアリー' }, { letter: 'f', title: 'フォトライフ' }, { letter: 'g', title: 'グループ' }, { letter: 'i', title: 'アイデア' }, { letter: 'm', title: 'メッセージ' }, { letter: 'q', title: '人力検索' }, { letter: 's', title: 'スター' }]
	var letter = location.host.replace(/\.hatena\.ne\.jp/, '');
	for (var n = 0; n < services.length; n++) {
		if (services[n].letter == letter) {
			if (n == services.length) n == 0;
			else n++;

			var a = document.createElement('a');
			a.href = location.href.replace(/^https?:\/\/(?:[^\.]+)(\.hatena\.ne\.jp\/)([^\/]+).*/, 'http://' + services[n].letter + '$1$2');
			var img = document.createElement('img');
			img.src = '/images/tri_de.gif';
			img.title = services[n].title;
			img.border = '0px';
			img.style.marginTop = '0px !important';
			a.appendChild(img);
			var node = $X('//a[@href="/" or @href="http://' + location.host + '/"]')[0];
			if (node) node.parentNode.insertBefore(a, node.nextSibling);
		}
	}
})();