trace2html_importer.html revision 8d2b206a675ec20ea07100c35df34e65ee1e45e8 
1<!DOCTYPE html>
2<!--
3Copyright (c) 2014 The Chromium Authors. All rights reserved.
4Use of this source code is governed by a BSD-style license that can be
5found 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
16tr.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    isTraceDataContainer: function() {
72      return true;
73    },
74
75    extractSubtraces: function() {
76      return Trace2HTMLImporter.subtraces_;
77    },
78
79    importEvents: function() {
80    }
81  };
82
83
84  tr.importer.Importer.register(Trace2HTMLImporter);
85
86
87  return {
88    Trace2HTMLImporter: Trace2HTMLImporter
89  };
90});
91</script>
92