☰

YouTube Links

Show the available video links.

目前为 2014-10-08 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name           YouTube Links
  3. // @namespace      http://www.smallapple.net/
  4. // @description    Show the available video links.
  5. // @author         Ng Hun Yang
  6. // @include        http://*.youtube.com/*
  7. // @include        http://youtube.com/*
  8. // @include        https://*.youtube.com/*
  9. // @include        https://youtube.com/*
  10. // @match          *://*.youtube.com/*
  11. // @match          *://*.googlevideo.com/*
  12. // @match          *://s.ytimg.com/yts/jsbin/*
  13. // @grant          GM_xmlhttpRequest
  14. // @version        1.63
  15. // ==/UserScript==
  16.  
  17. /* This is based on YouTube HD Suite 3.4.1 */
  18.  
  19. /* Tested on Firefox 5.0, Chrome 13 and Opera 11.50 */
  20.  
  21. (function() {
  22.  
  23. // =============================================================================
  24.  
  25. var win = typeof(unsafeWindow) !== "undefined" ? unsafeWindow : window;
  26. var doc = win.document;
  27. var loc = win.location;
  28.  
  29. var unsafeWin = win;
  30.  
  31. // Hack to get unsafe window in Chrome
  32. (function() {
  33.  
  34. var isChrome = navigator.userAgent.toLowerCase().indexOf("chrome") >= 0;
  35.  
  36. if(!isChrome)
  37.   return;
  38.  
  39. // Chrome 27 fixed this exploit, but luckily, its unsafeWin now works for us
  40. try {
  41.   var div = doc.createElement("div");
  42.   div.setAttribute("onclick", "return window;");
  43.   unsafeWin = div.onclick();
  44. } catch(e) {
  45.   }
  46.  
  47. }) ();
  48.  
  49. // =============================================================================
  50.  
  51. var SCRIPT_NAME = "YouTube Links";
  52.  
  53. var relInfo = {
  54.   ver: 16300,
  55.   ts: 2014100800,
  56.   desc: "Switch to Greasy Fork"
  57.   };
  58.  
  59. var SCRIPT_UPDATE_LINK = loc.protocol + "//greasyfork.org/scripts/5565-youtube-links-updater/code/YouTube Links Updater.user.js";
  60. var SCRIPT_LINK = loc.protocol + "//greasyfork.org/scripts/5566-youtube-links/code/YouTube Links.user.js";
  61.  
  62. // =============================================================================
  63.  
  64. var dom = {};
  65.  
  66. dom.gE = function(id) {
  67.   return doc.getElementById(id);
  68.   };
  69.  
  70. dom.gT = function(dom, tag) {
  71.   if(arguments.length == 1) {
  72.     tag = dom;
  73.     dom = doc;
  74.     }
  75.  
  76.   return dom.getElementsByTagName(tag);
  77.   };
  78.  
  79. dom.cE = function(tag) {
  80.   return doc.createElement(tag);
  81.   };
  82.  
  83. dom.cT = function(s) {
  84.   return doc.createTextNode(s);
  85.   };
  86.  
  87. dom.attr = function(obj, k, v) {
  88.   if(arguments.length == 2)
  89.     return obj.getAttribute(k);
  90.  
  91.   obj.setAttribute(k, v);
  92.   };
  93.  
  94. dom.prepend = function(obj, child) {
  95.   obj.insertBefore(child, obj.firstChild);
  96.   };
  97.  
  98. dom.append = function(obj, child) {
  99.   obj.appendChild(child);
  100.   };
  101.  
  102. dom.offset = function(obj) {
  103.   var x = 0;
  104.   var y = 0;
  105.  
  106.   if(obj.getBoundingClientRect) {
  107.     var box = obj.getBoundingClientRect();
  108.     var owner = obj.ownerDocument;
  109.  
  110.     x = box.left + Math.max(owner.documentElement.scrollLeft, owner.body.scrollLeft) - owner.documentElement.clientLeft;
  111.     y = box.top + Math.max(owner.documentElement.scrollTop, owner.body.scrollTop) - owner.documentElement.clientTop;
  112.  
  113.     return { left: x, top: y };
  114.     }
  115.  
  116.   if(obj.offsetParent) {
  117.     do {
  118.       x += obj.offsetLeft - obj.scrollLeft;
  119.       y += obj.offsetTop - obj.scrollTop;
  120.       obj = obj.offsetParent;
  121.     } while(obj);
  122.     }
  123.  
  124.   return { left: x, top: y };
  125.   };
  126.  
  127. dom.inViewport = function(el) {
  128.   var rect = el.getBoundingClientRect();
  129.  
  130.   return rect.bottom >= 0 &&
  131.    rect.right >= 0 &&
  132.    rect.top < (win.innerHeight || doc.documentElement.clientHeight) &&
  133.    rect.left < (win.innerWidth || doc.documentElement.clientWidth);
  134.   };
  135.  
  136. dom.html = function(obj, s) {
  137.   if(arguments.length == 1)
  138.     return obj.innerHTML;
  139.  
  140.   obj.innerHTML = s;
  141.   };
  142.  
  143. dom.emitHtml = function(tag, attrs, body) {
  144.   if(arguments.length == 2) {
  145.     if(typeof(attrs) == "string") {
  146.       body = attrs;
  147.       attrs = {};
  148.       }
  149.     }
  150.  
  151.   var list = [];
  152.  
  153.   for(var k in attrs) {
  154.     list.push(k + "='" + attrs[k].replace(/'/g, "\\'") + "'");
  155.     }
  156.  
  157.   var s = "<" + tag + " " + list.join(" ") + ">";
  158.  
  159.   if(body != null)
  160.     s += body + "</" + tag + ">";
  161.  
  162.   return s;
  163.   };
  164.  
  165. dom.emitCssStyles = function(styles) {
  166.   var list = [];
  167.  
  168.   for(var k in styles) {
  169.     list.push(k + ": " + styles[k] + ";");
  170.     }
  171.  
  172.   return " { " + list.join(" ") + " }";
  173.   };
  174.  
  175. dom.ajax = function(opts) {
  176.   function newXhr() {
  177.     if(window.ActiveXObject) {
  178.       try {
  179.         return new ActiveXObject("Msxml2.XMLHTTP");
  180.         } catch(e) {
  181.           }
  182.  
  183.       try {
  184.         return new ActiveXObject("Microsoft.XMLHTTP");
  185.         } catch(e) {
  186.           return null;
  187.           }
  188.       }
  189.  
  190.     if(window.XMLHttpRequest)
  191.       return new XMLHttpRequest();
  192.  
  193.     return null;
  194.     }
  195.  
  196.   function nop() {
  197.     }
  198.  
  199.   // Entry point
  200.   var xhr = newXhr();
  201.  
  202.   opts = addProp({
  203.     type: "GET",
  204.     async: true,
  205.     success: nop,
  206.     error: nop,
  207.     complete: nop
  208.     }, opts);
  209.  
  210.   xhr.open(opts.type, opts.url, opts.async);
  211.  
  212.   xhr.onreadystatechange = function() {
  213.     if(xhr.readyState == 4) {
  214.       var status = +xhr.status;
  215.  
  216.       if(status >= 200 && status < 300) {
  217.         opts.success(xhr.responseText, "success", xhr);
  218.         }
  219.       else {
  220.         opts.error(xhr, "error");
  221.         }
  222.  
  223.       opts.complete(xhr);
  224.       }
  225.     };
  226.  
  227.   xhr.send("");
  228.   };
  229.  
  230. dom.crossAjax = function(opts) {
  231.   function wrapXhr(xhr) {
  232.     var headers = xhr.responseHeaders.replace("\r", "").split("\n");
  233.  
  234.     var obj = {};
  235.  
  236.     forEach(headers, function(idx, elm) {
  237.       var nv = elm.split(":");
  238.       if(nv[1] != null)
  239.         obj[nv[0].toLowerCase()] = nv[1].replace(/^\s+/, "").replace(/\s+$/, "");
  240.       });
  241.  
  242.     return {
  243.       responseText: xhr.responseText,
  244.       status: xhr.status,
  245.  
  246.       getAllResponseHeaders: function() {
  247.         return xhr.responseHeaders;
  248.         },
  249.  
  250.       getResponseHeader: function(name) {
  251.         return obj[name.toLowerCase()];
  252.         }
  253.       };
  254.     }
  255.  
  256.   function nop() {
  257.     }
  258.  
  259.   // Entry point
  260.   opts = addProp({
  261.     type: "GET",
  262.     async: true,
  263.     success: nop,
  264.     error: nop,
  265.     complete: nop
  266.     }, opts);
  267.  
  268.   if(typeof GM_xmlhttpRequest === "undefined") {
  269.     setTimeout(function() {
  270.       var xhr = {};
  271.       opts.error(xhr, "error");
  272.       opts.complete(xhr);
  273.       }, 0);
  274.     return;
  275.     }
  276.  
  277.   GM_xmlhttpRequest({
  278.     method: opts.type,
  279.     url: opts.url,
  280.     synchronous: !opts.async,
  281.  
  282.     onload: function(xhr) {
  283.       xhr = wrapXhr(xhr);
  284.  
  285.       if(xhr.status >= 200 && xhr.status < 300)
  286.         opts.success(xhr.responseText, "success", xhr);
  287.       else
  288.         opts.error(xhr, "error");
  289.  
  290.       opts.complete(xhr);
  291.       },
  292.  
  293.     onerror: function(xhr) {
  294.       xhr = wrapXhr(xhr);
  295.       opts.error(xhr, "error");
  296.       opts.complete(xhr);
  297.       }
  298.     });
  299.   };
  300.  
  301. dom.addEvent = function(e, type, fn) {
  302.   function mouseEvent(event) {
  303.     if(this != event.relatedTarget && !dom.isAChildOf(this, event.relatedTarget))
  304.       fn.call(this, event);
  305.     }
  306.  
  307.   // Entry point
  308.   if(e.addEventListener) {
  309.     var effFn = fn;
  310.  
  311.     if(type == "mouseenter") {
  312.       type = "mouseover";
  313.       effFn = mouseEvent;
  314.       }
  315.     else if(type == "mouseleave") {
  316.       type = "mouseout";
  317.       effFn = mouseEvent;
  318.       }
  319.  
  320.     e.addEventListener(type, effFn, /*capturePhase*/ false);
  321.     }
  322.   else
  323.     e.attachEvent("on" + type, function() { fn(win.event); });
  324.   };
  325.  
  326. dom.insertCss = function (styles) {
  327.   var ss = dom.cE("style");
  328.   dom.attr(ss, "type", "text/css");
  329.  
  330.   var hh = dom.gT("head") [0];
  331.   dom.append(hh, ss);
  332.   dom.append(ss, dom.cT(styles));
  333.   };
  334.  
  335. dom.isAChildOf = function(parent, child) {
  336.   if(parent === child)
  337.     return false;
  338.  
  339.   while(child && child !== parent) {
  340.     child = child.parentNode;
  341.     }
  342.  
  343.   return child === parent;
  344.   };
  345.  
  346. // -----------------------------------------------------------------------------
  347.  
  348. function timeNowInSec() {
  349.   return Math.round(+new Date() / 1000);
  350.   }
  351.  
  352. function forLoop(opts, fn) {
  353.   opts = addProp({ start: 0, inc: 1 }, opts);
  354.  
  355.   for(var idx = opts.start; idx < opts.num; idx += opts.inc) {
  356.     if(fn.call(opts, idx, opts) === false)
  357.       break;
  358.     }
  359.   }
  360.  
  361. function forEach(list, fn) {
  362.   forLoop({ num: list.length }, function(idx) {
  363.     return fn.call(list[idx], idx, list[idx]);
  364.     });
  365.   }
  366.  
  367. function addProp(dest, src) {
  368.   for(var k in src) {
  369.     if(src[k] != null)
  370.       dest[k] = src[k];
  371.     }
  372.  
  373.   return dest;
  374.   }
  375.  
  376. function unescHtmlEntities(s) {
  377.   return s.replace(/&lt;/g, "<").replace(/&gt;/g, ">").replace(/&amp;/g, "&").replace(/&quot;/g, '"').replace(/&#39;/g, "'");
  378.   }
  379.  
  380. function logMsg(s) {
  381.   win.console.log(s);
  382.   }
  383.  
  384. function cnvSafeFname(s) {
  385.   s = s.replace(/:/g, "-").replace(/"/g, "'").replace(/[\\/|*?]/g, "_");
  386.   return encodeURIComponent(s).replace(/'/g, "%27");
  387.   }
  388.  
  389. function getVideoName(s) {
  390.   var list = [
  391.     { name: "3GP", codec: "video/3gpp" },
  392.     { name: "FLV", codec: "video/x-flv" },
  393.     { name: "M4V", codec: "video/x-m4v" },
  394.     { name: "MP3", codec: "audio/mpeg" },
  395.     { name: "MP4", codec: "video/mp4" },
  396.     { name: "M4A", codec: "audio/mp4" },
  397.     { name: "QT", codec: "video/quicktime" },
  398.     { name: "WEBM", codec: "audio/webm" },
  399.     { name: "WEBM", codec: "video/webm" },
  400.     { name: "WMV", codec: "video/ms-wmv" }
  401.     ];
  402.  
  403.   var name = "?";
  404.  
  405.   forEach(list, function(idx, elm) {
  406.     if(s.match("^" + elm.codec)) {
  407.       name = elm.name;
  408.       return false;
  409.       }
  410.     });
  411.  
  412.   return name;
  413.   }
  414.  
  415. function snapToStdRes(res) {
  416.   var horzResList = [ 3840, 2048, 1440, 960, 640, 480, 320, 176 ];
  417.   var horzWideResList = [ 2880, 1920, 1280, 854, 640, 426, 256 ];
  418.   var vertResList = [ 2160, 1536, 1080, 720, 480, 360, 240, 144 ];
  419.  
  420.   if(!res.match(/^(\d+)x(\d+)/))
  421.     return res;
  422.  
  423.   var wd = +RegExp.$1;
  424.   var ht = +RegExp.$2;
  425.   var foundIdx;
  426.  
  427.   // Snap to the nearest vert res first
  428.   forEach(vertResList, function(idx, elm) {
  429.     var tolerance = elm * 0.1;
  430.     if(ht >= elm - tolerance && ht <= elm + tolerance) {
  431.       foundIdx = idx;
  432.       return false;
  433.       }
  434.     });
  435.  
  436.   if(!foundIdx)
  437.     return res;
  438.  
  439.   var aspectRatio = wd / ht;
  440.  
  441.   ht = vertResList[foundIdx];
  442.   wd = Math.round(ht * aspectRatio);
  443.  
  444.   // Snap to the nearest horz res
  445.   forEach(aspectRatio < 1.5 ? horzResList : horzWideResList, function(idx, elm) {
  446.     var tolerance = elm * 0.1;
  447.     if(wd >= elm - tolerance && wd <= elm + tolerance) {
  448.       wd = elm;
  449.       return false;
  450.       }
  451.     });
  452.  
  453.   return wd + "x" + ht;
  454.   }
  455.  
  456. function cnvResName(res) {
  457.   var resMap = {
  458.     "audio": "Audio"
  459.     };
  460.  
  461.   if(resMap[res])
  462.     return resMap[res];
  463.  
  464.   if(!res.match(/^(\d+)x(\d+)/))
  465.     return res;
  466.  
  467.   var wd = +RegExp.$1;
  468.   var ht = +RegExp.$2;
  469.  
  470.   var vertResMap = {
  471.     "2160": "2k",
  472.     "1536": "1.5k",
  473.     "240": "240v",
  474.     "144": "144v"
  475.     };
  476.  
  477.   if(vertResMap[ht])
  478.     return vertResMap[ht];
  479.  
  480.   return String(ht) + (wd / ht < 1.5 ? "f" : "p");
  481.   }
  482.  
  483. function mapResToQuality(res) {
  484.   if(!res.match(/^[0-9]+x([0-9]+)$/))
  485.     return res;
  486.  
  487.   var resList = [
  488.     { res: 1536, q : "highres" },
  489.     { res: 1080, q: "hd1080" },
  490.     { res: 720, q : "hd720" },
  491.     { res: 480, q : "large" },
  492.     { res: 360, q : "medium" }
  493.     ];
  494.  
  495.   var res = +RegExp.$1;
  496.  
  497.   for(var i = 0; i < resList.length; ++i) {
  498.     if(res >= resList[i].res)
  499.       return resList[i].q;
  500.     }
  501.  
  502.   return "small";
  503.   }
  504.  
  505. function getQualityIdx(quality) {
  506.   var list = [ "small", "medium", "large", "hd720", "hd1080", "highres" ];
  507.  
  508.   for(var i = 0; i < list.length; ++i) {
  509.     if(list[i] == quality)
  510.       return i;
  511.     }
  512.  
  513.   return -1;
  514.   }
  515.  
  516. // =============================================================================
  517.  
  518. RegExp.escape = function(s) {
  519.   return String(s).replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
  520.   };
  521.  
  522. var decryptSig = {
  523.   store: {}
  524.   };
  525.  
  526. (function () {
  527.  
  528. var SIG_STORE_ID = "ujsYtLinksSig";
  529.  
  530. var CHK_SIG_INTERVAL = 3 * 86400;
  531.  
  532. decryptSig.load = function() {
  533.   var obj = localStorage[SIG_STORE_ID];
  534.   if(obj == null)
  535.     return;
  536.  
  537.   decryptSig.store = JSON.parse(obj);
  538.   };
  539.  
  540. decryptSig.save = function() {
  541.   localStorage[SIG_STORE_ID] = JSON.stringify(decryptSig.store);
  542.   };
  543.  
  544. decryptSig.extractScriptUrl = function(data) {
  545.   if(data.match(/ytplayer.config\s*=.*\"assets"\s*:\s*{.*"js"\s*:\s*(".+?")/))
  546.     return JSON.parse(RegExp.$1);
  547.   else
  548.     return false;
  549.   };
  550.  
  551. decryptSig.getScriptName = function(url) {
  552.   if(url.match(/\/yts\/jsbin\/html5player-(.*)\/html5player\.js$/))
  553.     return RegExp.$1;
  554.  
  555.   if(url.match(/\/html5player-(.*)\.js$/))
  556.     return RegExp.$1;
  557.  
  558.   return url;
  559.   };
  560.  
  561. decryptSig.fetchScript = function(scriptName, url) {
  562.   function success(data) {
  563.     if(!data.match(/\.signature\s*=\s*(\w+)\(\w+\)/))
  564.       return;
  565.  
  566.     //console.log(scriptName + " sig fn: " + RegExp.$1);
  567.  
  568.     if(!data.match(new RegExp("function " + RegExp.$1 + '\\s*\\((\\w+)\\)\\s*{(\\w+=\\w+\\.split\\(""\\);.+?;return \\w+\\.join\\(""\\))')))
  569.       return;
  570.  
  571.     var fnParam = RegExp.$1;
  572.     var fnBody = RegExp.$2;
  573.  
  574.     var fnHlp = {};
  575.     var objHlp = {};
  576.  
  577.     //console.log("param: " + fnParam);
  578.     //console.log(fnBody);
  579.  
  580.     fnBody = fnBody.split(";");
  581.  
  582.     forEach(fnBody, function(idx, elm) {
  583.       // its own property
  584.       if(elm.match(new RegExp("^" + fnParam + "=" + fnParam + "\\.")))
  585.         return;
  586.  
  587.       // global fn
  588.       if(elm.match(new RegExp("^" + fnParam + "=([a-zA-Z_$][a-zA-Z0-9_$]*)\\("))) {
  589.         var name = RegExp.$1;
  590.         //console.log("fnHlp: " + name);
  591.  
  592.         if(fnHlp[name])
  593.           return;
  594.  
  595.         if(data.match(new RegExp("(function " + RegExp.escape(RegExp.$1) + ".+?;return \\w+})")))
  596.           fnHlp[name] = RegExp.$1;
  597.  
  598.         return;
  599.         }
  600.  
  601.       // object fn
  602.       if(elm.match(new RegExp("^([a-zA-Z_$][a-zA-Z0-9_$]*)\.([a-zA-Z_$][a-zA-Z0-9_$]*)\\("))) {
  603.         var name = RegExp.$1;
  604.         console.log("objHlp: " + name);
  605.  
  606.         if(objHlp[name])
  607.           return;
  608.  
  609.         if(data.match(new RegExp("(var " + RegExp.escape(RegExp.$1) + "={.+?};)")))
  610.           objHlp[name] = RegExp.$1;
  611.  
  612.         return;
  613.         }
  614.       });
  615.  
  616.     //console.log(fnHlp);
  617.     //console.log(objHlp);
  618.  
  619.     var fnHlpStr = "";
  620.  
  621.     for(var k in fnHlp)
  622.       fnHlpStr += fnHlp[k];
  623.  
  624.     for(var k in objHlp)
  625.       fnHlpStr += objHlp[k];
  626.  
  627.     var fullFn = "function(" + fnParam + "){" + fnHlpStr + fnBody.join(";") + "}";
  628.     //console.log(fullFn);
  629.  
  630.     decryptSig.store[scriptName] = { ver: relInfo.ver, ts: timeNowInSec(), fn: fullFn };
  631.     //console.log(decryptSig);
  632.  
  633.     decryptSig.save();
  634.     }
  635.  
  636.   // Entry point
  637.   dom.crossAjax({ url: url, success: success });
  638.   };
  639.  
  640. decryptSig.condFetchScript = function(url) {
  641.   var scriptName = decryptSig.getScriptName(url);
  642.   var store = decryptSig.store[scriptName];
  643.   var now = timeNowInSec();
  644.  
  645.   if(store && now - store.ts < CHK_SIG_INTERVAL && store.ver == relInfo.ver)
  646.     return;
  647.  
  648.   decryptSig.fetchScript(scriptName, url);
  649.   };
  650.  
  651. }) ();
  652.  
  653. function deobfuscateVideoSig(scriptName, sig) {
  654.   if(!decryptSig.store[scriptName])
  655.     return sig;
  656.  
  657.   //console.log(decryptSig.store[scriptName].fn);
  658.  
  659.   try {
  660.     sig = eval("(" + decryptSig.store[scriptName].fn + ") (\"" + sig + "\")");
  661.   } catch(e) {
  662.     }
  663.  
  664.   return sig;
  665.   }
  666.  
  667. // =============================================================================
  668.  
  669. function parseStreamMap(map, value) {
  670.   var fmtUrlList = [];
  671.  
  672.   forEach(value.split(","), function(idx, elm) {
  673.     var elms = elm.replace(/(\\\/)/g, "/").replace(/(\\u0026)/g, "&").split("&");
  674.     var obj = {};
  675.  
  676.     forEach(elms, function(idx, elm) {
  677.       var kv = elm.split("=");
  678.       obj[kv[0]] = decodeURIComponent(kv[1]);
  679.       });
  680.  
  681.     obj.itag = +obj.itag;
  682.  
  683.     if(obj.conn != null && obj.conn.match(/^rtmpe:\/\//))
  684.       obj.isDrm = true;
  685.  
  686.     if(obj.s != null && obj.sig == null) {
  687.       var sig = deobfuscateVideoSig(map.scriptName, obj.s);
  688.       if(sig != obj.s) {
  689.         obj.sig = sig;
  690.         delete obj.s;
  691.         }
  692.       }
  693.  
  694.     fmtUrlList.push(obj);
  695.     });
  696.  
  697.   //logMsg(fmtUrlList);
  698.  
  699.   map.fmtUrlList = fmtUrlList;
  700.   }
  701.  
  702. function parseAdaptiveStreamMap(map, value) {
  703.   var fmtUrlList = [];
  704.  
  705.   forEach(value.split(","), function(idx, elm) {
  706.     var elms = elm.replace(/(\\\/)/g, "/").replace(/(\\u0026)/g, "&").split("&");
  707.     var obj = {};
  708.  
  709.     forEach(elms, function(idx, elm) {
  710.       var kv = elm.split("=");
  711.       obj[kv[0]] = decodeURIComponent(kv[1]);
  712.       });
  713.  
  714.     obj.itag = +obj.itag;
  715.  
  716.     if(obj.bitrate != null)
  717.       obj.bitrate = +obj.bitrate;
  718.  
  719.     //console.log(obj);
  720.     //console.log(map.videoId + ": " + obj.index + " " + obj.init + " " + obj.itag + " " + obj.size + " " + obj.bitrate + " " + obj.type);
  721.  
  722.     if(obj.type.match(/^video\/mp4/))
  723.       obj.effType = "video/x-m4v";
  724.  
  725.     if(obj.type.match(/^audio\//))
  726.       obj.size = "audio";
  727.  
  728.     var stdRes = snapToStdRes(obj.size);
  729.     obj.quality = mapResToQuality(stdRes);
  730.  
  731.     if(obj.s != null && obj.sig == null) {
  732.       var sig = deobfuscateVideoSig(map.scriptName, obj.s);
  733.       if(sig != obj.s) {
  734.         obj.sig = sig;
  735.         delete obj.s;
  736.         }
  737.       }
  738.  
  739.     fmtUrlList.push(obj);
  740.  
  741.     map.fmtMap[obj.itag] = { res: cnvResName(stdRes) };
  742.     });
  743.  
  744.   map.fmtUrlList = map.fmtUrlList.concat(fmtUrlList);
  745.   }
  746.  
  747. function parseFmtList(map, value) {
  748.   var list = value.split(",");
  749.   var fmtMap = {};
  750.  
  751.   forEach(list, function(idx, elm) {
  752.     var elms = elm.replace(/(\\\/)/g, "/").split("/");
  753.  
  754.     var fmtId = elms[0];
  755.     var res = elms[1];
  756.     elms.splice(/*idx*/ 0, /*rm*/ 2);
  757.  
  758.     fmtMap[fmtId] = { res: cnvResName(res), vars: elms };
  759.     });
  760.  
  761.   map.fmtMap = fmtMap;
  762.   }
  763.  
  764. function getExt(elm) {
  765.   return "";
  766.   }
  767.  
  768. function getVideoInfo(url, callback) {
  769.   function success(data) {
  770.     var map = {};
  771.  
  772.     if(data.match(/<div\s+id="verify-details">/)) {
  773.       logMsg("Skipping " + url);
  774.       return;
  775.       }
  776.  
  777.     if(data.match(/<h1\s+id="unavailable-message">/)) {
  778.       logMsg("Not avail " + url);
  779.       return;
  780.       }
  781.  
  782.     if(data.match(/"t":\s?"(.+?)"/))
  783.       map.t = RegExp.$1;
  784.  
  785.     if(data.match(/"video_id":\s?"(.+?)"/))
  786.       map.videoId = RegExp.$1;
  787.  
  788.     map.scriptUrl = decryptSig.extractScriptUrl(data);
  789.     if(map.scriptUrl) {
  790.       //console.log(map.videoId + " script: " + map.scriptUrl);
  791.       map.scriptName = decryptSig.getScriptName(map.scriptUrl);
  792.       decryptSig.condFetchScript(map.scriptUrl);
  793.       }
  794.  
  795.     if(data.match(/<meta\s+itemprop="name"\s*content="(.+)"\s*>\s*\n/))
  796.       map.title = unescHtmlEntities(RegExp.$1);
  797.  
  798.     if(map.title == null && data.match(/<meta\s+name="title"\s*content="(.+)"\s*>/))
  799.       map.title = unescHtmlEntities(RegExp.$1);
  800.  
  801.     if(data.match(/"url_encoded_fmt_stream_map":\s?"(.+?)"/))
  802.       parseStreamMap(map, RegExp.$1);
  803.  
  804.     if(data.match(/"fmt_list":\s?"(.+?)"/))
  805.       parseFmtList(map, RegExp.$1);
  806.  
  807.     if(data.match(/"adaptive_fmts":\s?"(.+?)"/))
  808.       parseAdaptiveStreamMap(map, RegExp.$1);
  809.  
  810.     map.fmtUrlList.sort(function(a, b) {
  811.       return getQualityIdx(b.quality) - getQualityIdx(a.quality);
  812.       });
  813.  
  814.     callback(map);
  815.     }
  816.  
  817.   // Entry point
  818.   dom.ajax({ url: url, success: success });
  819.   }
  820.  
  821. // -----------------------------------------------------------------------------
  822.  
  823. var CSS_PREFIX = "ujs-";
  824.  
  825. var HDR_LINKS_HTML_ID = CSS_PREFIX + "hdr-links-div";
  826. var LINKS_HTML_ID = CSS_PREFIX + "links-cls";
  827. var LINKS_TP_HTML_ID = CSS_PREFIX + "links-tp-div";
  828. var UPDATE_HTML_ID = CSS_PREFIX + "update-div";
  829. var VID_FMT_BTN_ID = CSS_PREFIX + "vid-fmt-btn";
  830.  
  831. /* The !important attr is to override the page's specificity. */
  832. var CSS_STYLES =
  833.   "#" + VID_FMT_BTN_ID + dom.emitCssStyles({
  834.     "margin": "0 0.333em"
  835.     }) + "\n" +
  836.   "#" + UPDATE_HTML_ID + dom.emitCssStyles({
  837.     "background-color": "#f00",
  838.     "border-radius": "2px",
  839.     "color": "#fff",
  840.     "padding": "5px",
  841.     "text-align": "center",
  842.     "text-decoration": "none",
  843.     "position": "fixed",
  844.     "top": "0.5em",
  845.     "right": "0.5em",
  846.     "z-index": "100"
  847.     }) + "\n" +
  848.   "#" + UPDATE_HTML_ID + ":hover" + dom.emitCssStyles({
  849.     "background-color": "#0d0"
  850.     }) + "\n" +
  851.   "#" + HDR_LINKS_HTML_ID + dom.emitCssStyles({
  852.     "background-color": "#eee",
  853.     "border": "#ccc 1px solid",
  854.     //"border-radius": "3px",
  855.     "color": "#333",
  856.     "font-size": "90%",
  857.     "margin": "5px",
  858.     "padding": "5px"
  859.     }) + "\n" +
  860.   "#" + HDR_LINKS_HTML_ID + " ." + CSS_PREFIX + "group" + dom.emitCssStyles({
  861.     "background-color": "#fff",
  862.     "color": "#000 !important",
  863.     "border": "#ccc 1px solid",
  864.     "border-radius": "3px",
  865.     "display": "inline-block",
  866.     "margin": "3px",
  867.     }) + "\n" +
  868.   "#" + HDR_LINKS_HTML_ID + " a" + dom.emitCssStyles({
  869.     "display": "table-cell",
  870.     "padding": "3px",
  871.     "text-decoration": "none"
  872.     }) + "\n" +
  873.   "#" + HDR_LINKS_HTML_ID + " a:hover" + dom.emitCssStyles({
  874.     "background-color": "#d1e1fa"
  875.     }) + "\n" +
  876.   "div." + LINKS_HTML_ID + dom.emitCssStyles({
  877.     "border-radius": "3px",
  878.     "font-size": "90%",
  879.     "line-height": "1em",
  880.     "position": "absolute",
  881.     "left": "0",
  882.     "top": "0",
  883.     "z-index": "100"
  884.     }) + "\n" +
  885.   "#" + LINKS_TP_HTML_ID + dom.emitCssStyles({
  886.     "background-color": "#eee",
  887.     "border": "#aaa 1px solid",
  888.     "padding": "3px 0",
  889.     "text-decoration": "none",
  890.     "white-space": "nowrap",
  891.     "z-index": "110"
  892.     }) + "\n" +
  893.   "div." + LINKS_HTML_ID + " a" + dom.emitCssStyles({
  894.     "display": "inline-block",
  895.     "margin": "1px",
  896.     "text-decoration": "none"
  897.     }) + "\n" +
  898.   "div." + LINKS_HTML_ID + " ." + CSS_PREFIX + "video" + dom.emitCssStyles({
  899.     "display": "inline-block",
  900.     "text-align": "center",
  901.     "width": "3.5em"
  902.     }) + "\n" +
  903.   "div." + LINKS_HTML_ID + " ." + CSS_PREFIX + "quality" + dom.emitCssStyles({
  904.     "display": "inline-block",
  905.     "text-align": "center",
  906.     "width": "5.5em"
  907.     }) + "\n" +
  908.   "." + CSS_PREFIX + "video" + dom.emitCssStyles({
  909.     "color": "#fff !important",
  910.     "padding": "1px 3px",
  911.     "text-align": "center"
  912.     }) + "\n" +
  913.   "." + CSS_PREFIX + "quality" + dom.emitCssStyles({
  914.     "color": "#000 !important",
  915.     "display": "table-cell",
  916.     "padding": "1px 3px",
  917.     "vertical-align": "middle"
  918.     }) + "\n" +
  919.   "." + CSS_PREFIX + "filesize" + dom.emitCssStyles({
  920.     "font-size": "90%",
  921.     "margin-top": "2px",
  922.     "padding": "1px 3px",
  923.     "text-align": "center"
  924.     }) + "\n" +
  925.   "." + CSS_PREFIX + "filesize-err" + dom.emitCssStyles({
  926.     "color": "#f00",
  927.     "font-size": "90%",
  928.     "margin-top": "2px",
  929.     "padding": "1px 3px",
  930.     "text-align": "center"
  931.     }) + "\n" +
  932.   "." + CSS_PREFIX + "not-avail" + dom.emitCssStyles({
  933.     "background-color": "#700",
  934.     "color": "#fff",
  935.     "padding": "3px",
  936.     }) + "\n" +
  937.   "." + CSS_PREFIX + "3gp" + dom.emitCssStyles({
  938.     "background-color": "#bbb"
  939.     }) + "\n" +
  940.   "." + CSS_PREFIX + "flv" + dom.emitCssStyles({
  941.     "background-color": "#0dd"
  942.     }) + "\n" +
  943.   "." + CSS_PREFIX + "m4a" + dom.emitCssStyles({
  944.     "background-color": "#07e"
  945.     }) + "\n" +
  946.   "." + CSS_PREFIX + "m4v" + dom.emitCssStyles({
  947.     "background-color": "#07e"
  948.     }) + "\n" +
  949.   "." + CSS_PREFIX + "mp3" + dom.emitCssStyles({
  950.     "background-color": "#7ba"
  951.     }) + "\n" +
  952.   "." + CSS_PREFIX + "mp4" + dom.emitCssStyles({
  953.     "background-color": "#777"
  954.     }) + "\n" +
  955.   "." + CSS_PREFIX + "qt" + dom.emitCssStyles({
  956.     "background-color": "#f08"
  957.     }) + "\n" +
  958.   "." + CSS_PREFIX + "webm" + dom.emitCssStyles({
  959.     "background-color": "#e0e"
  960.     }) + "\n" +
  961.   "." + CSS_PREFIX + "wmv" + dom.emitCssStyles({
  962.     "background-color": "#c75"
  963.     }) + "\n" +
  964.   "." + CSS_PREFIX + "small" + dom.emitCssStyles({
  965.     "color": "#888 !important",
  966.     }) + "\n" +
  967.   "." + CSS_PREFIX + "medium" + dom.emitCssStyles({
  968.     "color": "#fff !important",
  969.     "background-color": "#0d0"
  970.     }) + "\n" +
  971.   "." + CSS_PREFIX + "large" + dom.emitCssStyles({
  972.     "color": "#fff !important",
  973.     "background-color": "#00d",
  974.     "background-image": "linear-gradient(to right, #00d, #00a)"
  975.     }) + "\n" +
  976.   "." + CSS_PREFIX + "hd720" + dom.emitCssStyles({
  977.     "color": "#fff !important",
  978.     "background-color": "#f90",
  979.     "background-image": "linear-gradient(to right, #f90, #d70)"
  980.     }) + "\n" +
  981.   "." + CSS_PREFIX + "hd1080" + dom.emitCssStyles({
  982.     "color": "#fff !important",
  983.     "background-color": "#f00",
  984.     "background-image": "linear-gradient(to right, #f00, #c00)"
  985.     }) + "\n" +
  986.   "." + CSS_PREFIX + "highres" + dom.emitCssStyles({
  987.     "color": "#fff !important",
  988.     "background-color": "#c0f",
  989.     "background-image": "linear-gradient(to right, #c0f, #90f)"
  990.     }) + "\n" +
  991.   "." + CSS_PREFIX + "pos-rel" + dom.emitCssStyles({
  992.     "position": "relative"
  993.     }) + "\n" +
  994.   "";
  995.  
  996. function condInsertHdr(divId) {
  997.   if(dom.gE(HDR_LINKS_HTML_ID))
  998.     return true;
  999.  
  1000.   var insertPtNode = dom.gE(divId);
  1001.   if(!insertPtNode)
  1002.     return false;
  1003.  
  1004.   var divNode = dom.cE("div");
  1005.   divNode.id = HDR_LINKS_HTML_ID;
  1006.  
  1007.   insertPtNode.parentNode.insertBefore(divNode, insertPtNode);
  1008.   return true;
  1009.   }
  1010.  
  1011. function condInsertTooltip() {
  1012.   if(dom.gE(LINKS_TP_HTML_ID))
  1013.     return true;
  1014.  
  1015.   var toolTipNode = dom.cE("div");
  1016.   toolTipNode.id = LINKS_TP_HTML_ID;
  1017.  
  1018.   dom.attr(toolTipNode, "class", LINKS_HTML_ID);
  1019.   dom.attr(toolTipNode, "style", "display: none;");
  1020.  
  1021.   dom.append(doc.body, toolTipNode);
  1022.  
  1023.   dom.addEvent(toolTipNode, "mouseleave", function(event) {
  1024.     //logMsg("mouse leave");
  1025.     dom.attr(toolTipNode, "style", "display: none;");
  1026.     });
  1027.   }
  1028.  
  1029. function condInsertUpdateIcon() {
  1030.   if(dom.gE(UPDATE_HTML_ID))
  1031.     return;
  1032.  
  1033.   var divNode = dom.cE("a");
  1034.   divNode.id = UPDATE_HTML_ID;
  1035.   dom.append(doc.body, divNode);
  1036.   }
  1037.  
  1038. // -----------------------------------------------------------------------------
  1039.  
  1040. var STORE_ID = "ujsYtLinks";
  1041. var JSONP_ID = "ujsYtLinks";
  1042.  
  1043. var userConfig = {
  1044.   showVideoFormats: true,
  1045.   showVideoSize: true,
  1046.   tagLinks: true
  1047.   };
  1048.  
  1049. var videoInfoCache = {};
  1050.  
  1051. var TAG_LINK_NUM_PER_BATCH = 5;
  1052. var INI_TAG_LINK_DELAY_MS = 200;
  1053. var SUB_TAG_LINK_DELAY_MS = 500;
  1054.  
  1055. // -----------------------------------------------------------------------------
  1056.  
  1057. function Links() {
  1058.   }
  1059.  
  1060. Links.prototype.init = function() {
  1061.   };
  1062.  
  1063. Links.prototype.getPreferredFmt = function(map) {
  1064.   var selElm = map.fmtUrlList[0];
  1065.  
  1066.   forEach(map.fmtUrlList, function(idx, elm) {
  1067.     if(getVideoName(elm.type).toLowerCase() != "webm") {
  1068.       selElm = elm;
  1069.       return false;
  1070.       }
  1071.     });
  1072.  
  1073.   return selElm;
  1074.   };
  1075.  
  1076. Links.prototype.checkFmts = function(forceFlag) {
  1077.   var me = this;
  1078.  
  1079.   if(!userConfig.showVideoFormats)
  1080.     return;
  1081.  
  1082.   if(!forceFlag && userConfig.showVideoFormats == "btn") {
  1083.     if(dom.gE(VID_FMT_BTN_ID))
  1084.       return;
  1085.  
  1086.     var btn = dom.cE("button");
  1087.     dom.attr(btn, "id", VID_FMT_BTN_ID);
  1088.     dom.attr(btn, "class", "yt-uix-button yt-uix-button-default");
  1089.     btn.innerHTML = "VidFmts";
  1090.  
  1091.     var mastH = dom.gE("yt-masthead-signin") || dom.gE("yt-masthead-user");
  1092.     if(!mastH)
  1093.       return;
  1094.  
  1095.     dom.prepend(mastH, btn);
  1096.  
  1097.     dom.addEvent(btn, "click", function(event) {
  1098.       me.checkFmts(/*force*/ true);
  1099.       });
  1100.  
  1101.     return;
  1102.     }
  1103.  
  1104.   if(!loc.href.match(/watch\?v=([a-zA-Z0-9_-]*)/))
  1105.     return false;
  1106.  
  1107.   var videoId = RegExp.$1;
  1108.  
  1109.   var url = loc.protocol + "//" + loc.host + "/watch?v=" + videoId;
  1110.  
  1111.   getVideoInfo(url, function(map) { me.showLinks("page", map); });
  1112.   };
  1113.  
  1114. Links.prototype.genUrl = function(map, elm) {
  1115.   var url = elm.url + "&title=" + cnvSafeFname(map.title + getExt(elm));
  1116.  
  1117.   if(elm.sig != null)
  1118.     url += "&signature=" + elm.sig;
  1119.  
  1120.   return url;
  1121.   };
  1122.  
  1123. Links.prototype.emitLinks = function(map) {
  1124.   function fmtSize(size) {
  1125.     var units = [ "kB", "MB", "GB" ];
  1126.     var idx = 0;
  1127.  
  1128.     for(idx = 0; idx < units.length; ++idx) {
  1129.       size /= 1024;
  1130.  
  1131.       if(size < 10)
  1132.         return Math.round(size * 100) / 100 + units[idx];
  1133.  
  1134.       if(size < 100)
  1135.         return Math.round(size * 10) / 10 + units[idx];
  1136.  
  1137.       if(size < 1024 || idx == units.length - 1)
  1138.         return Math.round(size) + units[idx];
  1139.       }
  1140.     }
  1141.  
  1142.   // Entry point
  1143.   var me = this;
  1144.   var s = [];
  1145.  
  1146.   var resMap = {};
  1147.  
  1148.   forEach(map.fmtUrlList, function(idx, elm) {
  1149.     var fmtMap = map.fmtMap[elm.itag];
  1150.  
  1151.     if(!resMap[fmtMap.res]) {
  1152.       resMap[fmtMap.res] = [];
  1153.       resMap[fmtMap.res].quality = elm.quality;
  1154.       }
  1155.  
  1156.     resMap[fmtMap.res].push(elm);
  1157.     });
  1158.  
  1159.   var hasHighRes = resMap["720p"] != null || resMap["1080p"] != null;
  1160.  
  1161.   for(var res in resMap) {
  1162.     if(hasHighRes && (res === "144v" || res === "240v"))
  1163.       continue;
  1164.  
  1165.     var qFields = [];
  1166.  
  1167.     qFields.push(dom.emitHtml("div", { "class": CSS_PREFIX + "quality " + CSS_PREFIX + resMap[res].quality }, res));
  1168.  
  1169.     forEach(resMap[res], function(idx, elm) {
  1170.       var fields = [];
  1171.       var fmtMap = map.fmtMap[elm.itag];
  1172.       var videoName = getVideoName(elm.effType || elm.type);
  1173.  
  1174.       var varMsg = "";
  1175.  
  1176.       if(elm.bitrate != null)
  1177.         varMsg = fmtSize(elm.bitrate) + "/s";
  1178.       else if(fmtMap.vars != null)
  1179.         varMsg = fmtMap.vars.join();
  1180.  
  1181.       var addMsg = [ elm.itag, elm.type, elm.size || elm.quality, varMsg ];
  1182.  
  1183.       if(elm.s != null)
  1184.         addMsg.push("sig-" + elm.s.length);
  1185.  
  1186.       if(elm.fileSize != null && elm.fileSize >= 0)
  1187.         addMsg.push(fmtSize(elm.fileSize));
  1188.  
  1189.       var vidSuffix = "";
  1190.  
  1191.       if(elm.itag == 82 || elm.itag == 83 || elm.itag == 84 || elm.itag == 100 || elm.itag == 101 || elm.itag == 102)
  1192.         vidSuffix = " (3D)";
  1193.  
  1194.       fields.push(dom.emitHtml("div", { "class": CSS_PREFIX + "video " + CSS_PREFIX + videoName.toLowerCase() }, videoName + vidSuffix));
  1195.  
  1196.       if(elm.fileSize != null) {
  1197.         if(elm.fileSize >= 0) {
  1198.           fields.push(dom.emitHtml("div", { "class": CSS_PREFIX + "filesize" }, fmtSize(elm.fileSize)));
  1199.           }
  1200.         else {
  1201.           var msg;
  1202.  
  1203.           if(elm.isDrm)
  1204.             msg = "DRM";
  1205.           else if(elm.s != null)
  1206.             msg = "sig-" + elm.s.length;
  1207.           else
  1208.             msg = "Err";
  1209.  
  1210.           fields.push(dom.emitHtml("div", { "class": CSS_PREFIX + "filesize-err" }, msg));
  1211.           }
  1212.         }
  1213.  
  1214.       var url;
  1215.  
  1216.       if(elm.isDrm)
  1217.         url = elm.conn + "?" + elm.stream;
  1218.       else
  1219.         url = me.genUrl(map, elm);
  1220.  
  1221.       var ahref = dom.emitHtml("a", {
  1222.         href: url,
  1223.         title: addMsg.join(" | ")
  1224.         }, fields.join(""));
  1225.  
  1226.       qFields.push(ahref);
  1227.       });
  1228.  
  1229.     s.push(dom.emitHtml("div", { "class": CSS_PREFIX + "group" }, qFields.join("")));
  1230.     }
  1231.  
  1232.   return s.join("");
  1233.   };
  1234.  
  1235. var INI_SHOW_FILESIZE_DELAY_MS = 500;
  1236. var SUB_SHOW_FILESIZE_DELAY_MS = 200;
  1237.  
  1238. Links.prototype.showLinks = function(divId, map) {
  1239.   function updateLinks() {
  1240.     //!! Hack to update file size
  1241.     if(condInsertHdr(divId))
  1242.       dom.html(dom.gE(HDR_LINKS_HTML_ID), me.emitLinks(map));
  1243.     }
  1244.  
  1245.   // Entry point
  1246.   var me = this;
  1247.  
  1248.   // video is not avail
  1249.   if(!map.fmtUrlList)
  1250.     return;
  1251.  
  1252.   //logMsg(JSON.stringify(map));
  1253.  
  1254.   if(!condInsertHdr(divId))
  1255.     return;
  1256.  
  1257.   dom.html(dom.gE(HDR_LINKS_HTML_ID), me.emitLinks(map));
  1258.  
  1259.   if(!userConfig.showVideoSize)
  1260.     return;
  1261.  
  1262.   forEach(map.fmtUrlList, function(idx, elm) {
  1263.     //logMsg(elm.itag + " " + elm.url);
  1264.  
  1265.     // We just fail outright for protected/obfuscated videos
  1266.     if(elm.isDrm || elm.s != null) {
  1267.       elm.fileSize = -1;
  1268.       updateLinks();
  1269.       return;
  1270.       }
  1271.  
  1272.     setTimeout(function() {
  1273.       dom.crossAjax({
  1274.         type: "HEAD",
  1275.         url: me.genUrl(map, elm),
  1276.  
  1277.         success: function(data, status, xhr) {
  1278.           var fileSize = xhr.getResponseHeader("Content-Length");
  1279.           if(fileSize == null)
  1280.             return;
  1281.  
  1282.           //logMsg(map.title + " " + elm.itag + ": " + fileSize);
  1283.           elm.fileSize = fileSize;
  1284.  
  1285.           updateLinks();
  1286.           },
  1287.  
  1288.         error: function(xhr, status) {
  1289.           //logMsg(map.fmtMap[elm.itag].res + " " + getVideoName(elm.type) + ": " + xhr.status);
  1290.  
  1291.           if(xhr.status != 403)
  1292.             return;
  1293.  
  1294.           elm.fileSize = -1;
  1295.  
  1296.           updateLinks();
  1297.           },
  1298.  
  1299.         complete: function(xhr) {
  1300.           //logMsg(map.title + ": " + xhr.getAllResponseHeaders());
  1301.           }
  1302.         });
  1303.        }, INI_SHOW_FILESIZE_DELAY_MS + idx * SUB_SHOW_FILESIZE_DELAY_MS);
  1304.     });
  1305.   };
  1306.  
  1307. Links.prototype.tagLinks = function() {
  1308.   var SCANNED = 1;
  1309.   var REQ_INFO = 2;
  1310.   var ADDED_INFO = 3;
  1311.  
  1312.   function prepareTagHtml(node, map) {
  1313.     var elm = me.getPreferredFmt(map);
  1314.     var fmtMap = map.fmtMap[elm.itag];
  1315.  
  1316.     dom.attr(node, "class", LINKS_HTML_ID + " " + CSS_PREFIX + "quality " + CSS_PREFIX + elm.quality);
  1317.  
  1318.     dom.addEvent(node, "mouseenter", function(event) {
  1319.       //logMsg("mouse enter " + map.videoId);
  1320.       var pos = dom.offset(node);
  1321.       //logMsg("mouse enter: x " + pos.left + ", y " + pos.top);
  1322.  
  1323.       var toolTipNode = dom.gE(LINKS_TP_HTML_ID);
  1324.  
  1325.       dom.attr(toolTipNode, "style", "position: absolute; left: " + pos.left + "px; top: " + pos.top + "px");
  1326.  
  1327.       dom.html(toolTipNode, me.emitLinks(map));
  1328.       });
  1329.  
  1330.     node.href = elm.url + "&title=" + cnvSafeFname(map.title + getExt(elm));
  1331.  
  1332.     return fmtMap.res;
  1333.     }
  1334.  
  1335.   function addTag(hNode, map) {
  1336.     //logMsg(dom.html(hNode));
  1337.     //logMsg("hNode " + dom.attr(hNode, "class"));
  1338.     //var img = dom.gT(hNode, "img") [0];
  1339.     //logMsg(dom.attr(img, "src"));
  1340.     //logMsg(dom.attr(img, "class"));
  1341.  
  1342.     dom.attr(hNode, CSS_PREFIX + "processed", ADDED_INFO);
  1343.  
  1344.     var node = dom.cE("div");
  1345.  
  1346.     if(map.fmtUrlList) {
  1347.       tagHtml = prepareTagHtml(node, map);
  1348.       }
  1349.     else {
  1350.       dom.attr(node, "class", LINKS_HTML_ID + " " + CSS_PREFIX + "not-avail");
  1351.       tagHtml = "NA";
  1352.       }
  1353.  
  1354.     var parentNode = hNode.parentNode;
  1355.     var parentCssPositionStyle = window.getComputedStyle(parentNode, null).getPropertyValue("position");
  1356.  
  1357.     if(parentCssPositionStyle != "absolute" && parentCssPositionStyle != "relative")
  1358.       dom.attr(parentNode, "class", dom.attr(parentNode, "class") + " " + CSS_PREFIX + "pos-rel");
  1359.  
  1360.     hNode.parentNode.insertBefore(node, hNode);
  1361.  
  1362.     dom.html(node, tagHtml);
  1363.     }
  1364.  
  1365.   function getFmt(videoId, hNode) {
  1366.     if(videoInfoCache[videoId]) {
  1367.       addTag(hNode, videoInfoCache[videoId]);
  1368.       return;
  1369.       }
  1370.  
  1371.     var url;
  1372.  
  1373.     if(videoId.match(/.+==$/))
  1374.       url = loc.protocol + "//" + loc.host + "/cthru?key=" + videoId;
  1375.     else
  1376.       url = loc.protocol + "//" + loc.host + "/watch?v=" + videoId;
  1377.  
  1378.     getVideoInfo(url, function(map) {
  1379.       videoInfoCache[videoId] = map;
  1380.       addTag(hNode, map);
  1381.       });
  1382.     }
  1383.  
  1384.   // Entry point
  1385.   var me = this;
  1386.  
  1387.   var list = [];
  1388.  
  1389.   forEach(dom.gT("a"), function(idx, hNode) {
  1390.     if(dom.attr(hNode, CSS_PREFIX + "processed"))
  1391.       return;
  1392.  
  1393.     if(!dom.inViewport(hNode))
  1394.       return;
  1395.  
  1396.     dom.attr(hNode, CSS_PREFIX + "processed", SCANNED);
  1397.  
  1398.     if(!hNode.href.match(/watch\?v=([a-zA-Z0-9_-]*)/) &&
  1399.      !hNode.href.match(/watch_videos.+?&video_ids=([a-zA-Z0-9_-]*)/))
  1400.       return;
  1401.  
  1402.     var videoId = RegExp.$1;
  1403.  
  1404.     var cls = dom.attr(hNode, "class") || "";
  1405.     if(cls == "yt-button" || cls.match(/yt-uix-button/))
  1406.       return;
  1407.  
  1408.     if(dom.attr(hNode.parentNode, "class") == "video-time")
  1409.       return;
  1410.  
  1411.     if(dom.html(hNode).match(/video-logo/i))
  1412.       return;
  1413.  
  1414.     var img = dom.gT(hNode, "img");
  1415.     if(img == null || img.length == 0)
  1416.       return;
  1417.  
  1418.     img = img[0];
  1419.  
  1420.     var imgSrc = dom.attr(img, "src") || "";
  1421.     if(imgSrc.indexOf("ytimg.com") < 0)
  1422.       return;
  1423.  
  1424.     var tnSrc = dom.attr(img, "thumb") || "";
  1425.  
  1426.     if(imgSrc.match(/.+?\/([a-zA-Z0-9_-]*)\/default\.jpg$/))
  1427.       videoId = RegExp.$1;
  1428.     else if(tnSrc.match(/.+?\/([a-zA-Z0-9_-]*)\/default\.jpg$/))
  1429.       videoId = RegExp.$1;
  1430.  
  1431.     //logMsg(idx + " " + hNode.href);
  1432.     //logMsg("videoId: " + videoId);
  1433.  
  1434.     list.push({ videoId: videoId, hNode: hNode });
  1435.  
  1436.     dom.attr(hNode, CSS_PREFIX + "processed", REQ_INFO);
  1437.     });
  1438.  
  1439.   forLoop({ num: list.length, inc: TAG_LINK_NUM_PER_BATCH, batchIdx: 0 }, function(idx) {
  1440.     var batchIdx = this.batchIdx++;
  1441.     var batchList = list.slice(idx, idx + TAG_LINK_NUM_PER_BATCH);
  1442.  
  1443.     setTimeout(function() {
  1444.       forEach(batchList, function(idx, elm) {
  1445.         //logMsg(batchIdx + " " + idx + " " + elm.hNode.href);
  1446.         getFmt(elm.videoId, elm.hNode);
  1447.         });
  1448.       }, INI_TAG_LINK_DELAY_MS + batchIdx * SUB_TAG_LINK_DELAY_MS);
  1449.     });
  1450.   };
  1451.  
  1452. Links.prototype.periodicTagLinks = function(delayMs) {
  1453.   function poll() {
  1454.     me.tagLinks();
  1455.     me.tagLinksTimerId = setTimeout(poll, 3000);
  1456.     }
  1457.  
  1458.   // Entry point
  1459.   if(!userConfig.tagLinks)
  1460.     return;
  1461.  
  1462.   var me = this;
  1463.  
  1464.   delayMs = delayMs || 0;
  1465.  
  1466.   if(me.tagLinksTimerId != null) {
  1467.     clearTimeout(me.tagLinksTimerId);
  1468.     delete me.tagLinksTimerId;
  1469.     }
  1470.  
  1471.   setTimeout(poll, delayMs);
  1472.   };
  1473.  
  1474. // -----------------------------------------------------------------------------
  1475.  
  1476. Links.prototype.loadSettings = function() {
  1477.   var obj = localStorage[STORE_ID];
  1478.   if(obj == null)
  1479.     return;
  1480.  
  1481.   obj = JSON.parse(obj);
  1482.  
  1483.   this.lastChkReqTs = +obj.lastChkReqTs;
  1484.   this.lastChkTs = +obj.lastChkTs;
  1485.   this.lastChkVer = +obj.lastChkVer;
  1486.   };
  1487.  
  1488. Links.prototype.storeSettings = function() {
  1489.   localStorage[STORE_ID] = JSON.stringify({
  1490.     lastChkReqTs: this.lastChkReqTs,
  1491.     lastChkTs: this.lastChkTs,
  1492.     lastChkVer: this.lastChkVer
  1493.     });
  1494.   };
  1495.  
  1496. // -----------------------------------------------------------------------------
  1497.  
  1498. var UPDATE_CHK_INTERVAL = 5 * 86400;
  1499. var FAIL_TO_CHK_UPDATE_INTERVAL = 14 * 86400;
  1500.  
  1501. Links.prototype.chkVer = function(forceFlag) {
  1502.   if(this.lastChkVer > relInfo.ver) {
  1503.     this.showNewVer({ ver: this.lastChkVer });
  1504.     return;
  1505.     }
  1506.  
  1507.   var now = timeNowInSec();
  1508.  
  1509.   //logMsg("lastChkReqTs " + this.lastChkReqTs + ", diff " + (now - this.lastChkReqTs));
  1510.   //logMsg("lastChkTs " + this.lastChkTs);
  1511.   //logMsg("lastChkVer " + this.lastChkVer);
  1512.  
  1513.   if(this.lastChkReqTs == null || now < this.lastChkReqTs) {
  1514.     this.lastChkReqTs = now;
  1515.     this.storeSettings();
  1516.     return;
  1517.     }
  1518.  
  1519.   if(now - this.lastChkReqTs < UPDATE_CHK_INTERVAL)
  1520.     return;
  1521.  
  1522.   if(this.lastChkReqTs - this.lastChkTs > FAIL_TO_CHK_UPDATE_INTERVAL)
  1523.     logMsg("Failed to check ver for " + ((this.lastChkReqTs - this.lastChkTs) / 86400) + " days");
  1524.  
  1525.   this.lastChkReqTs = now;
  1526.   this.storeSettings();
  1527.  
  1528.   unsafeWin[JSONP_ID] = this;
  1529.  
  1530.   var script = dom.cE("script");
  1531.   script.type = "text/javascript";
  1532.   script.src  = SCRIPT_UPDATE_LINK;
  1533.   dom.append(doc.body, script);
  1534.   };
  1535.  
  1536. Links.prototype.chkVerCallback = function(data) {
  1537.   delete unsafeWin[JSONP_ID];
  1538.  
  1539.   this.lastChkTs = timeNowInSec();
  1540.   this.storeSettings();
  1541.  
  1542.   //logMsg(JSON.stringify(data));
  1543.  
  1544.   var latestElm = data[0];
  1545.  
  1546.   if(latestElm.ver <= relInfo.ver)
  1547.     return;
  1548.  
  1549.   this.showNewVer(latestElm);
  1550.   };
  1551.  
  1552. Links.prototype.showNewVer = function(latestElm) {
  1553.   function getVerStr(ver) {
  1554.     var verStr = "" + ver;
  1555.  
  1556.     var majorV = verStr.substr(0, verStr.length - 4) || "0";
  1557.     var minorV = verStr.substr(verStr.length - 4, 2);
  1558.     return majorV + "." + minorV;
  1559.     }
  1560.  
  1561.   // Entry point
  1562.   this.lastChkVer = latestElm.ver;
  1563.   this.storeSettings();
  1564.  
  1565.   condInsertUpdateIcon();
  1566.  
  1567.   var aNode = dom.gE(UPDATE_HTML_ID);
  1568.  
  1569.   aNode.href = SCRIPT_LINK;
  1570.  
  1571.   if(latestElm.desc != null)
  1572.     dom.attr(aNode, "title", latestElm.desc);
  1573.  
  1574.   dom.html(aNode, dom.emitHtml("b", SCRIPT_NAME + " " + getVerStr(relInfo.ver)) +
  1575.    "<br>Click to update to " + getVerStr(latestElm.ver));
  1576.   };
  1577.  
  1578. // -----------------------------------------------------------------------------
  1579.  
  1580. var inst = new Links();
  1581.  
  1582. inst.init();
  1583. inst.loadSettings();
  1584. decryptSig.load();
  1585.  
  1586. dom.insertCss(CSS_STYLES);
  1587.  
  1588. condInsertTooltip();
  1589.  
  1590. if(loc.pathname.match(/\/watch/)) {
  1591.   inst.checkFmts();
  1592.   }
  1593.  
  1594. inst.periodicTagLinks();
  1595.  
  1596. var scrollTop = win.pageYOffset || doc.documentElement.scrollTop;
  1597.  
  1598. dom.addEvent(win, "scroll", function(e) {
  1599.   var newScrollTop = win.pageYOffset || doc.documentElement.scrollTop;
  1600.  
  1601.   if(Math.abs(newScrollTop - scrollTop) < 100)
  1602.     return;
  1603.  
  1604.   //logMsg("scroll by " + (newScrollTop - scrollTop));
  1605.  
  1606.   scrollTop = newScrollTop;
  1607.  
  1608.   inst.periodicTagLinks(200);
  1609.   });
  1610.  
  1611. inst.chkVer();
  1612.  
  1613. // -----------------------------------------------------------------------------
  1614.  
  1615. /* YouTube reuses the current page when the user clicks on a new video. We need
  1616.  to detect it and reload the formats. */
  1617.  
  1618. (function() {
  1619.  
  1620. var PERIODIC_CHK_VIDEO_URL_MS = 1000;
  1621.  
  1622. var curVideoUrl = loc.toString();
  1623.  
  1624. function periodicChkVideoUrl() {
  1625.   var newVideoUrl = loc.toString();
  1626.  
  1627.   if(curVideoUrl != newVideoUrl) {
  1628.     //console.log(curVideoUrl + " -> " + newVideoUrl);
  1629.  
  1630.     curVideoUrl = newVideoUrl;
  1631.  
  1632.     if(loc.pathname.match(/\/watch/))
  1633.       inst.checkFmts();
  1634.     }
  1635.  
  1636.   setTimeout(periodicChkVideoUrl, PERIODIC_CHK_VIDEO_URL_MS);
  1637.   }
  1638.  
  1639. periodicChkVideoUrl();
  1640.  
  1641. }) ();
  1642.  
  1643. // -----------------------------------------------------------------------------
  1644.  
  1645. }) ();