<!DOCTYPE html>
<!--
Copyright (c) 2013 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<link rel="import" href="/base/base.html">
<link rel="import" href="/base/range_utils.html">
<link rel="import" href="/core/auditor.html">
<link rel="import" href="/extras/chrome/cc/input_latency_async_slice.html">
<link rel="import" href="/extras/chrome/chrome_model_helper.html">
<link rel="import" href="/extras/rail/rail_ir_finder.html">
<link rel="import" href="/model/event_info.html">

<script>
'use strict';

/**
 * @fileoverview Base class for trace data Auditors.
 */
tr.exportTo('tr.e.audits', function() {
  var Auditor = tr.c.Auditor;

  /**
   * Auditor for Chrome-specific traces.
   * @constructor
   */
  function ChromeAuditor(model) {
    Auditor.call(this, model);

    if (tr.e.audits.ChromeModelHelper.supportsModel(this.model)) {
      var modelHelper = new tr.e.audits.ChromeModelHelper(this.model);

      // Must be a browserHelper in order to do audits.
      if (modelHelper.browserHelper === undefined)
        this.modelHelper = undefined;
      else
        this.modelHelper = modelHelper;
    } else {
      this.modelHelper = undefined;
    }
  };

  ChromeAuditor.prototype = {
    __proto__: Auditor.prototype,

    runAnnotate: function() {
      if (!this.modelHelper)
        return;

      this.model.getAllProcesses().forEach(function(process) {
        if (process.labels !== undefined &&
            process.labels.length == 1 &&
            process.labels[0] == 'chrome://tracing')
          process.important = false;
      });
    },

    runAudit: function() {
      if (!this.modelHelper)
        return;

      // ChromeAuditor is disabled when used directly inside about://tracing,
      // for now.
      if (tr.isExported('profilingView'))
        return;

      if (tr.e.rail.RAILIRFinder.supportsModelHelper(this.modelHelper)) {
        var rirf = new tr.e.rail.RAILIRFinder(this.model, this.modelHelper);
        rirf.findAllInteractionRecords().forEach(function(ir) {
          this.model.addInteractionRecord(ir);

          var alerts = this.createAlertsForIR_(ir);
          alerts.forEach(function(alert) {
            this.model.alerts.push(alert);
          }, this);
        }, this);
      }
    },

    createAlertsForIR_: function(ir) {
      var allAlerts = [];
      ir.associatedEvents.forEach(function(event) {
        if (!(event instanceof tr.model.Slice))
          return;
        var slice = event;

        if (slice.category != 'toplevel')
          return;
        if (slice.duration > 75.0) {
          var alertInfo = new tr.model.EventInfo(
              'Task too long',
              'Tasks taking >= 75ms are bad, and should be broken up to ' +
              'ensure the main thread is responsive');
          var center = slice.start + 0.5 * slice.duration;
          var alert = new tr.model.Alert(
              alertInfo, center, [slice]);
          allAlerts.push(alert);
        }
      });
      return allAlerts;
    }
  };

  Auditor.register(ChromeAuditor);

  return {
    ChromeAuditor: ChromeAuditor
  };
});
</script>