lastModifiedPanel.uc.js

lastModifiedPanel.uc.js

// ==UserScript==
// @name           lastModifiedPanel.uc.js
// @description    adds toolbaritem that indicates Last-Modified.
// @include        main
// @compatibility  Firefox 4.0+
// @namespace      http://twitter.com/xulapp
// @author         xulapp
// @license        MIT License
// @version        2011/04/03 19:00 +09:00 addon-bar
// ==/UserScript==
// @version        2010/04/01 23:20 +09:00 閾値を大きくしてみた。ついでに 3.7 に対応
// @version        2010/03/30 13:20 +09:00


let lastModifiedPanel = (function() {
	// 現在時刻との差がこの値未満なら Last-Modified ではないと判断する
	const LOAD_TIME_THRESHOLD = 30 * 1000;

	addStyle(<![CDATA[
		#lastModifiedPanel {
			-moz-box-align: center;
		}
		#lastModifiedPanel.then > label {
			opacity: 0.5;
		}
		#lastModifiedPanel.none > label {
			opacity: 0;
		}
	]]>);

	var item = $E(<toolbaritem id="lastModifiedPanel"/>);
	var label = $E(<label/>);

	$('addon-bar').appendChild(item).appendChild(label);

	eval('gBrowser.updateTitlebar = ' + gBrowser.updateTitlebar.toString().replace(
		/(?=\}$)/,
		'lastModifiedPanel.updateStatusFor(this.contentDocument);'
	));

	return {
		updateStatusFor: updateStatusFor,
	};

	function updateStatusFor(doc) {
		if (!('SLMIS_state' in doc)) {
			let lm = new Date(doc.lastModified);
			if (lm.getFullYear() === 1970) {
				item.classList.add('none');
				return;
			}
			item.classList.remove('none');

			doc.SLMIS_state = {
				lastModified: lm.toLocaleString(),
				then: Date.now() - lm < LOAD_TIME_THRESHOLD,
			};
		}

		var {lastModified, then} = doc.SLMIS_state;
		if (then) {
			item.classList.add('then');
		} else {
			item.classList.remove('then');
		}
		label.setAttribute('value', lastModified);
	}

	function $(id) document.getElementById(id);
	function $E(xml, doc) {
		doc = doc || document;
		xml = <root xmlns={doc.documentElement.namespaceURI}>{xml}</root>;
		var pp = XML.prettyPrinting;
		XML.prettyPrinting = false;
		var root = new DOMParser().parseFromString(xml.toXMLString(), 'application/xml').documentElement;
		XML.prettyPrinting = pp;
		doc.adoptNode(root);
		var range = doc.createRange();
		range.selectNodeContents(root);
		var frag = range.extractContents();
		range.detach();
		return frag.childNodes.length < 2 ? frag.firstChild : frag;
	}
	function addStyle(css) {
		var pi = document.createProcessingInstruction(
			'xml-stylesheet',
			'type="text/css" href="data:text/css;utf-8,' + encodeURIComponent(css) + '"'
		);
		return document.insertBefore(pi, document.documentElement);
	}
})();