viewCharInfo.uc.js

viewCharInfo.uc.js

// ==UserScript==
// @name           viewCharInfo.uc.js
// @description    
// @include        main
// @compatibility  Firefox
// @namespace      http://twitter.com/xulapp
// @author         xulapp
// @license        MIT License
// @version        2011/06/01 01:20 +09:00
// ==/UserScript==


(function viewCharInfo() {
	const XUL_NS = 'http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul';

	var chr = '';

	var menuitem = document.createElementNS(XUL_NS, 'menuitem');
	menuitem.setAttribute('id', 'context-viewcharinfo');
	menuitem.setAttribute('accesskey', 'i');
	menuitem.addEventListener('command', function VCI_onCommand() {
		var code = getUnicodeCharCode(chr);
		gBrowser.loadOneTab('http://unicode.org/cgi-bin/GetUnihanData.pl?codepoint=' + code.toString(16));
	}, false);

	var contentAreaContextMenu = $('contentAreaContextMenu');
	contentAreaContextMenu.insertBefore(menuitem, $('context-searchselect').nextSibling);
	contentAreaContextMenu.addEventListener('popupshowing', function VCI_onContextPopupShowing() {
		if (gContextMenu.isTextSelected) {
			var sel = content.getSelection().toString().substring(0, 2);
			chr = getUnicodeChar(sel);
			menuitem.setAttribute('label', U('文字の情報を調べる: "') + chr + '"');
		}
		gContextMenu.showItem(menuitem, gContextMenu.isTextSelected);
	}, false);

	function isSurrogateCodePoint(chr) {
		var code = chr.charCodeAt(0);
		return 0xd800 <= code && code <= 0xdb7f;
	}
	function getUnicodeChar(str) {
		var result = str[0];
		if (isSurrogateCodePoint(result))
			result += str[1];

		return result;
	}
	function getUnicodeCharCode(str) {
		var code = str.charCodeAt(0);
		if (isSurrogateCodePoint(str))
			code = ((code & 0x3ff) << 10 | str.charCodeAt(1) & 0x3ff) + 0x10000;

		return code;
	}

	function U(text) 1 < 'あ'.length ? decodeURIComponent(escape(text)) : text;
	function $(id) document.getElementById(id);
})();