Home | History | Annotate | Download | only in importer 
      1 <!DOCTYPE html>
      2 <!--
      3 Copyright (c) 2014 The Chromium Authors. All rights reserved.
      4 Use of this source code is governed by a BSD-style license that can be
      5 found in the LICENSE file.
      6 -->
      7 
      8 <link rel="import" href="/tracing/importer/importer.html">
      9 <link rel="import" href="/tracing/importer/simple_line_reader.html">
     10 <link rel="import" href="/tracing/base/base64.html">
     11 <link rel="import" href="/tracing/model/model.html">
     12 
     13 <script>
     14 'use strict';
     15 
     16 tr.exportTo('tr.e.importer', function() {
     17 
     18   function Trace2HTMLImporter(model, events) {
     19     this.importPriority = 0;
     20   }
     21 
     22   Trace2HTMLImporter.subtraces_ = [];
     23 
     24   function _extractEventsFromHTML(text) {
     25     // Clear the array before pushing data to it.
     26     Trace2HTMLImporter.subtraces_ = [];
     27 
     28     var r = new tr.importer.SimpleLineReader(text);
     29 
     30     // Try to find viewer-data...
     31     while (true) {
     32       if (!r.advanceToLineMatching(
     33           new RegExp('^<\s*script id="viewer-data" ' +
     34                      'type="(application\/json|text\/plain)">$')))
     35         break;
     36 
     37       r.beginSavingLines();
     38       if (!r.advanceToLineMatching(/^<\/\s*script>$/))
     39         return failure;
     40 
     41       var raw_events = r.endSavingLinesAndGetResult();
     42 
     43       // Drop off first and last event as it contains the end script tag.
     44       raw_events = raw_events.slice(1, raw_events.length - 1);
     45       var data64 = raw_events.join('\n');
     46       var buffer = new ArrayBuffer(
     47           tr.b.Base64.getDecodedBufferLength(data64));
     48       var len = tr.b.Base64.DecodeToTypedArray(data64, new DataView(buffer));
     49       Trace2HTMLImporter.subtraces_.push(buffer.slice(0, len));
     50     }
     51   }
     52 
     53   function _canImportFromHTML(text) {
     54     if (/^<!DOCTYPE html>/.test(text) === false)
     55       return false;
     56 
     57     // Try to find viewer-data...
     58     _extractEventsFromHTML(text);
     59     if (Trace2HTMLImporter.subtraces_.length === 0)
     60       return false;
     61     return true;
     62   }
     63 
     64   Trace2HTMLImporter.canImport = function(events) {
     65     return _canImportFromHTML(events);
     66   };
     67 
     68   Trace2HTMLImporter.prototype = {
     69     __proto__: tr.importer.Importer.prototype,
     70 
     71     get importerName() {
     72       return 'Trace2HTMLImporter';
     73     },
     74 
     75     isTraceDataContainer: function() {
     76       return true;
     77     },
     78 
     79     extractSubtraces: function() {
     80       return Trace2HTMLImporter.subtraces_;
     81     },
     82 
     83     importEvents: function() {
     84     }
     85   };
     86 
     87 
     88   tr.importer.Importer.register(Trace2HTMLImporter);
     89 
     90 
     91   return {
     92     Trace2HTMLImporter: Trace2HTMLImporter
     93   };
     94 });
     95 </script>
     96