tools/page_cycler/common/head.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 var __c = ""; // that's good enough for me.
   6 var __td;
   7 var __tf;
   8 var __tl;
   9 var __iterations;
  10 var __cycle;
  11 var __results = false;
  12 var __page;
  13 var __TIMEOUT = 15;
  14 function __get_cookie(name) {
  15   var cookies = document.cookie.split("; ");
  16   for (var i = 0; i < cookies.length; ++i) {
  17     var t = cookies[i].split("=");
  18     if (t[0] == name && t[1])
  19       return t[1];
  20   }
  21   return "";
  22 }
  23 function __pages() {  // fetch lazily
  24   if (!("data" in this))
  25     this.data = __get_cookie("__pc_pages").split(",");
  26   return this.data;
  27 }
  28 function __get_timings() {
  29   if (sessionStorage != null &&
  30       sessionStorage.getItem("__pc_timings") != null) {
  31     return sessionStorage["__pc_timings"];
  32   } else {
  33     return __get_cookie("__pc_timings");
  34   }
  35 }
  36 function __set_timings(timings) {
  37   if (sessionStorage == null)
  38     document.cookie = "__pc_timings=" + timings + "; path=/";
  39   else
  40     sessionStorage["__pc_timings"]=timings;
  41 }
  42 function __ontimeout() {
  43   var doc;
  44
  45   // Call GC twice to cleanup JS heap before starting a new test.
  46   if (window.gc) {
  47     window.gc();
  48     window.gc();
  49   }
  50
  51   var timings = __tl;
  52   var oldTimings = __get_timings();
  53   if (oldTimings != "") {
  54     timings = oldTimings + "," + timings;
  55   }
  56   __set_timings(timings);
  57
  58   var ts = (new Date()).getTime();
  59   var tlag = (ts - __te) - __TIMEOUT;
  60   if (tlag > 0)
  61     __tf = __tf + tlag;
  62   if (__cycle == (__pages().length * __iterations)) {
  63     document.cookie = "__pc_done=1; path=/";
  64     doc = "../../common/report.html";
  65     if (window.console) {
  66       console.log("Pages: [" + __get_cookie('__pc_pages') + "]");
  67       console.log("times: [" + __get_timings() + "]");
  68     }
  69   } else {
  70     doc = "../" + __pages()[__page] + "/index.html";
  71   }
  72
  73   var url = doc + "?n=" + __iterations + "&i=" + __cycle + "&p=" + __page +
  74             "&ts=" + ts + "&td=" + __td + "&tf=" + __tf;
  75   document.location.href = url;
  76 }
  77 function __onload() {
  78   if (__results) {
  79     // Set a variable to indicate that the result report page is loaded.
  80     document.cookie = "__navigated_to_report=1; path=/";
  81     return;
  82   }
  83   var unused = document.body.offsetHeight;  // force layout
  84
  85   var ts = 0, td = 0, te = (new Date()).getTime(), tf = 0;
  86
  87   var s = document.location.search;
  88   if (s) {
  89     var params = s.substring(1).split('&');
  90     for (var i = 0; i < params.length; ++i) {
  91       var f = params[i].split('=');
  92       switch (f[0]) {
  93       case 'skip':
  94         // No calculation, just viewing
  95         return;
  96       case 'n':
  97         __iterations = f[1];
  98         break;
  99       case 'i':
 100         __cycle = (f[1] - 0) + 1;
 101         break;
 102       case 'p':
 103         __page = ((f[1] - 0) + 1) % __pages().length;
 104         break;
 105       case 'ts':
 106         ts = (f[1] - 0);
 107         break;
 108       case 'td':
 109         td = (f[1] - 0);
 110         break;
 111       case 'tf':
 112         tf = (f[1] - 0);
 113         break;
 114       }
 115     }
 116   }
 117   __tl = (te - ts);
 118   __td = td + __tl;
 119   __te = te;
 120   __tf = tf;  // record t-fudge
 121
 122   setTimeout("__ontimeout()", __TIMEOUT);
 123 }
 124
 125 if (window.attachEvent)
 126   window.attachEvent("onload", __onload);
 127 else
 128   addEventListener("load", __onload, false);