/*
* GTranslatifier Jetpack feature v0.2.1
* Translate pages or selected text using Google Translate.
* 
* By Elijah Grey, http://eligrey.com
* 
* Inspired by "Jetpack: Google Translator" version 0.1 by Florian CROUZAT:
*   http://jetpack.floriancrouzat.net/google-translator/google-translator.html
* 
* License: GNU GPL v3 and the X11/MIT license
*   See http://purl.eligrey.com/license
*/


const prefs = Components.classes["@mozilla.org/preferences-service;1"]
                .getService(Components.interfaces.nsIPrefService),

gt = { // GTranslatifier namespace
	name: "GTranslatifier",
	
	translate: function (clickEvent) {
		var tab = jetpack.tabs.focused,
		selection = String(tab.contentWindow.getSelection())
			.replace(/^\s+|\s+$/g, ""), // trim whitespace
		URI = tab.url,
		button = clickEvent.button,
		translatedURI = "http://translate.google.com/translate";
		
		if (tab.contentWindow.location.hostname === "translate.google.com") {
			// un-translate page
			tab.contentWindow.location.assign(decodeURIComponent(
				URI.split("u=")[1].split("&")[0]
			));
			return;
		}
		
		if (selection.length > 0) { // translate selection (open new tab)
			translatedURI +=
				  "_t"
				+ "?text=" + encodeURIComponent(selection)
				+ "&hl=" + gt.userLocale
				+ "&langpair=auto|" + gt.userLocale
				+ "&tbb=1";
			
			gt.open(translatedURI);
			return
		} else { // translate page
			translatedURI +=
				 "?u=" + encodeURIComponent(URI)
				+ "&hl=" + gt.userLocale
				+ "&langpair=auto|" + gt.userLocale
				+ "&tbb=1";
			
			if (button) { // right or middle click, open in new tab
				gt.open(translatedURI);
			} else { // left click, open in same tab
				tab.contentWindow.location.assign(translatedURI);
			}
			return;
		}
	},
	
	open: function (URI) {
		jetpack.tabs.open(URI).focus();
	},
	
	supportedLocales: [
		"sq", "ar", "bg", "ca", "zh-CN", "zh-TW", "hr", "cs",
		"da", "nl", "en", "et", "tl", "fi", "fr", "gl", "de",
		"el", "iw", "hi", "hu", "id", "it", "ja", "ko", "lv",
		"lt", "mt", "no", "pl", "pt", "ro", "ru", "sr", "sk",
		"sl", "es", "sv", "th", "tr", "uk", "vi", "cy", "yi"
	],
	
	icon: <![CDATA[
			data:image/png;base64,
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		]]>.toString().replace(/\s/g, ""),
	
	userLocale: prefs.getBranch("general.useragent.").getCharPref("locale")
};

if (gt.supportedLocales.indexOf(gt.userLocale) === -1) {
	// Google Translate doesn't support the language, try non-region-specific
	gt.userLocale = gt.userLocale.split("-")[0];
	if (gt.supportedLocales.indexOf(gt.userLocale) === -1) { // still not supported
		gt.userLocale = "en"; // default to en (English)
	}
}

// GTranslatifier widget
jetpack.statusBar.append({
	html: <img style="margin-top:3px" src={gt.icon} alt={gt.name} title={gt.name}/>.toXMLString(),
	width: 20,
	onReady: function (widget) {
		widget.addEventListener("click", gt.translate, false);
	}
});