/* Copyright 2011 Google */
(function() {
    var injectionScript = fillInTemplate("(function(){({{$code}})();})();", {
        code: window.injection.toString()
    }),
        injectorScript = fillInTemplate("(function(){({{$code}})();})();", {
            code: window.injector.toString()
        });
    delete window.injector;
    delete window.injection;

    function injectIntoPage(tabId, userLang, color) {
        map = {
            userLang: userLang,
            color: color,
            translateHeader: chrome.i18n.getMessage("translate_header")
        };
        map.content = escapeStrings(fillInTemplate(injectionScript, map));
        chrome.tabs.insertCSS(tabId, {
            code: ".goog-te-sectional-gadget-link,.goog-te-sectional-gadget-link div {display:inline}.goog-te-sectional-gadget-link-text {font-size:13px !important;font-weight:normal !important}.goog-trans-control:before {content: '\u00a0\u00a0-\u00a0\u00a0'}"
        });
        chrome.tabs.executeScript(tabId, {
            code: fillInTemplate(injectorScript, map)
        })
    }

    function addTranslateToTab(tabId, b, origin) {
        var langcode = getNormalizedLangcode(),
            color = "#ff9";
        localStorage["gt-lang"] && (langcode = localStorage["gt-lang"]);
        localStorage["gt-color"] && (color = localStorage["gt-color"]);
        (origin == "user_click" || localStorage["gt-autoAdd"] != "false") && injectIntoPage(tabId, langcode, color)
    }
    function exportSymbols() {
        for (var obj = addTranslateToTab, symbols = "addTranslateToTab", symbols = symbols.split("."), namespace = window, d = 0; d < symbols.length - 1; ++d)
            namespace = namespace[symbols[d]] || (namespace[symbols[d]] = {});
        namespace[symbols[symbols.length - 1]] = obj
    }
    function fillInTemplate(template, map) {
        return template.replace(/\{\{\$.*?\}\}/g, function(template) {
            template = template.substr(3, template.length - 5);
            return String(map[template]) || ""
        })
    }
    function escapeStrings(a) {
        return a.replace(/\\/g, "\\\\").replace(/'/g, "\\'").replace(/"/g, '\\"').replace(/\n/g, "\\n")
    }

    function getNormalizedLangcode() {
        var a = window.navigator.language;
        return a.toLowerCase() == "zh-tw" ? "zh-TW" : a.toLowerCase() == "zh-cn" ? "zh-CN" : a.toLowerCase() == "pt-pt" ? "pt-PT" : a.toLowerCase() == "pt-br" ? "pt-BR" : a.length >= 2 ? a.substr(0, 2) : "en"
    }
    exportSymbols();
})();