// ==UserScript==
// @name         网页翻译
// @author       Kaiter
// @namespace    https://gitee.com/Kaiter-Plus
// @description  给每个非中文的网页左下角添加一个google翻译图标\n直接调用 Google 的翻译接口对非中文网页进行翻译
// @include      *://*
// @run-at       document-end
// @version      0.1
// @downloadURL none
// ==/UserScript==

(function () {
    // 获取当前页面的语言
    let lang = document.documentElement.lang;

    // 判断是不是中文，如果不是则执行
    if (lang.substr(0, 2) != "zh" && lang != "") {
        // 导入谷歌翻译接口
        let googletrans = document.createElement("script");
        googletrans.src = "//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit";
        document.head.appendChild(googletrans);

        // 初始化
        let script = document.createElement("script");
        let text = "";
        text += [
            "function googleTranslateElementInit() {",
            "    var google_translate_element = document.getElementById('google_translate_element');",
            "    var timer = setInterval(function() {",
            "        google_translate_element = document.getElementById('google_translate_element');",
            "        if (google_translate_element) {",
            "            clearInterval(timer);",
            "            //var langName = navigator.language ? navigator.language.split('-')[0].toLowerCase() : 'en';",
            "            new google.translate.TranslateElement({",
            "                pageLanguage: 'auto',",
            "               //包括的语言，中文简体，中文繁体，英语，日语，俄语",
            "                includedLanguages: 'zh-CN,zh-TW,en,ja,ru',",
            "                //0，原生select，并且谷歌logo显示在按钮下方。1，原生select，并且谷歌logo显示在右侧。2，完全展开语言列表，适合pc，",
            "                layout: /mobile/i.test(navigator.userAgent) ? 0 : 2,",
            "            }, 'google_translate_element');",
            "            // 清除图片的请求",
            "            img = [].slice.call(document.querySelectorAll('#goog-gt-tt img,#google_translate_element img'));",
            "            img.forEach(function(v, i) {",
            "                v.src = '';",
            "            });",
            "        }",
            "    }, 300);",
            "}"
        ].join("\n");;
        script.appendChild(document.createTextNode(text));
        document.head.appendChild(script);

        // 在页面的左下角显示一个翻译图标,防止和其它插件位置冲突
        var google_translate_element = document.createElement('div');
        google_translate_element.id = 'google_translate_element';
        google_translate_element.style = 'position: fixed;left: 10px;bottom: 10px;border-radius: 5px;overflow: hidden;box-shadow: 1px 2px 6px 2px #888;';
        document.body.appendChild(google_translate_element);


    }
})();