<!DOCTYPE html>
<!--
Copyright (c) 2015 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="/core/tracks/chart_track.html">
<link rel="import" href="/core/tracks/container_track.html">
<link rel="import" href="/core/tracks/letter_dot_track.html">
<link rel="import" href="/core/tracks/memory_dump_track_util.html">

<script>
'use strict';

tr.exportTo('tr.c.tracks', function() {

  var USED_MEMORY_TRACK_HEIGHT = 50;
  var ALLOCATED_MEMORY_TRACK_HEIGHT = 50;

  /**
   * A track that displays an array of GlobalMemoryDump objects.
   * @constructor
   * @extends {ContainerTrack}
   */
  var GlobalMemoryDumpTrack = tr.b.ui.define(
      'global-memory-dump-track', tr.c.tracks.ContainerTrack);

  GlobalMemoryDumpTrack.prototype = {
    __proto__: tr.c.tracks.ContainerTrack.prototype,

    decorate: function(viewport) {
      tr.c.tracks.ContainerTrack.prototype.decorate.call(this, viewport);
      this.memoryDumps_ = undefined;
    },

    get memoryDumps() {
      return this.memoryDumps_;
    },

    set memoryDumps(memoryDumps) {
      this.memoryDumps_ = memoryDumps;
      this.updateContents_();
    },

    updateContents_: function() {
      this.tracks_.forEach(function(track) {
        this.removeChild(track);
      }, this);

      // Show no tracks if there are no dumps.
      if (!this.memoryDumps_ || !this.memoryDumps_.length)
        return;

      this.appendDumpDotsTrack_();
      this.appendUsedMemoryTrack_();
      this.appendAllocatedMemoryTrack_();
    },

    appendDumpDotsTrack_: function() {
      var items = tr.c.tracks.buildMemoryLetterDots(this.memoryDumps_);
      if (!items)
        return;

      var track = new tr.c.tracks.LetterDotTrack(this.viewport);
      track.heading = 'Memory Dumps';
      track.items = items;
      this.appendChild(track);
    },

    appendUsedMemoryTrack_: function() {
      var series = tr.c.tracks.buildGlobalUsedMemoryChartSeries(
          this.memoryDumps_);
      if (!series)
        return;

      var track = new tr.c.tracks.ChartTrack(this.viewport);
      track.heading = 'Used memory (per process)';
      track.height = USED_MEMORY_TRACK_HEIGHT + 'px';
      track.series = series;
      track.autoSetAllAxes({expandMax: true});
      this.appendChild(track);
    },

    appendAllocatedMemoryTrack_: function() {
      var series = tr.c.tracks.buildGlobalAllocatedMemoryChartSeries(
          this.memoryDumps_);
      if (!series)
        return;

      var track = new tr.c.tracks.ChartTrack(this.viewport);
      track.heading = 'Allocated memory (per allocator)';
      track.height = ALLOCATED_MEMORY_TRACK_HEIGHT + 'px';
      track.series = series;
      track.autoSetAllAxes({expandMax: true});
      this.appendChild(track);
    }
  };

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