src/third_party/trace-viewer/trace_viewer/tracing/importer/zip_importer.html

   1 <!DOCTYPE html>
   2 <!--
   3 Copyright (c) 2013 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/jszip.html">
   9 <link rel="import" href="/tracing/importer/importer.html">
  10 <link rel="import" href="/tracing/importer/gzip_importer.html">
  11 <link rel="import" href="/tracing/trace_model.html">
  12
  13 <script>
  14 'use strict';
  15
  16 /**
  17  * @fileoverview ZipImporter inflates zip compressed data and passes it along
  18  * to an actual importer.
  19  */
  20 tvcm.exportTo('tracing.importer', function() {
  21   var Importer = tracing.importer.Importer;
  22
  23   function ZipImporter(model, eventData) {
  24     if (eventData instanceof ArrayBuffer)
  25       eventData = new Uint8Array(eventData);
  26     this.model_ = model;
  27     this.eventData_ = eventData;
  28   }
  29
  30   /**
  31    * @param {eventData} string Possibly zip compressed data.
  32    * @return {boolean} Whether eventData looks like zip compressed data.
  33    */
  34   ZipImporter.canImport = function(eventData) {
  35     var header;
  36     if (eventData instanceof ArrayBuffer)
  37       header = new Uint8Array(eventData.slice(0, 2));
  38     else if (typeof(eventData) === 'string' || eventData instanceof String)
  39       header = [eventData.charCodeAt(0), eventData.charCodeAt(1)];
  40     else
  41       return false;
  42     return header[0] === 'P'.charCodeAt(0) && header[1] === 'K'.charCodeAt(0);
  43   };
  44
  45   ZipImporter.prototype = {
  46     __proto__: Importer.prototype,
  47
  48     extractSubtraces: function() {
  49       var zip = new JSZip(this.eventData_);
  50       var subtraces = [];
  51       for (var idx in zip.files)
  52         subtraces.push(zip.files[idx].asText());
  53       return subtraces;
  54     }
  55   };
  56
  57   tracing.TraceModel.registerImporter(ZipImporter);
  58
  59   return {
  60     ZipImporter: ZipImporter
  61   };
  62 });
  63 </script>