src/third_party/trace-viewer/src/tracing/tracks/heading_track.js

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 'use strict';
   6
   7 tvcm.requireStylesheet('tracing.tracks.heading_track');
   8
   9 tvcm.require('tracing.constants');
  10 tvcm.require('tracing.tracks.track');
  11 tvcm.require('tvcm.ui');
  12
  13 tvcm.exportTo('tracing.tracks', function() {
  14   /**
  15    * A track with a header. Provides the basic heading and tooltip
  16    * infrastructure. Subclasses must implement drawing code.
  17    * @constructor
  18    * @extends {HTMLDivElement}
  19    */
  20   var HeadingTrack = tvcm.ui.define('heading-track', tracing.tracks.Track);
  21
  22   HeadingTrack.prototype = {
  23     __proto__: tracing.tracks.Track.prototype,
  24
  25     decorate: function(viewport) {
  26       tracing.tracks.Track.prototype.decorate.call(this, viewport);
  27       this.classList.add('heading-track');
  28
  29       this.headingDiv_ = document.createElement('heading');
  30       this.headingDiv_.style.width = tracing.constants.HEADING_WIDTH + 'px';
  31       this.heading_ = '';
  32       this.selectionGenerator_ = undefined;
  33       this.updateContents_();
  34     },
  35
  36     get heading() {
  37       return this.heading_;
  38     },
  39
  40     set heading(text) {
  41       this.heading_ = text;
  42       this.updateContents_();
  43     },
  44
  45     set tooltip(text) {
  46       this.headingDiv_.title = text;
  47     },
  48
  49     set selectionGenerator(generator) {
  50       this.selectionGenerator_ = generator;
  51       this.updateContents_();
  52     },
  53
  54     updateContents_: function() {
  55       /**
  56        * If this is a heading track of a sampling thread, we add a link to
  57        * the heading text ("Sampling Thread"). We associate a selection
  58        * generator with the link so that sampling profiling results are
  59        * displayed in the bottom frame when you click the link.
  60        */
  61       this.headingDiv_.innerHTML = '';
  62       if (this.selectionGenerator_) {
  63         this.headingLink_ = document.createElement('a');
  64         tracing.analysis.AnalysisLink.decorate(this.headingLink_);
  65         this.headingLink_.selectionGenerator = this.selectionGenerator_;
  66         this.headingDiv_.appendChild(this.headingLink_);
  67         this.headingLink_.appendChild(document.createTextNode(this.heading_));
  68       } else {
  69         this.headingDiv_.appendChild(document.createTextNode(this.heading_));
  70       }
  71       this.appendChild(this.headingDiv_);
  72     },
  73
  74     draw: function(type, viewLWorld, viewRWorld) {
  75       throw new Error('draw implementation missing');
  76     }
  77   };
  78
  79   return {
  80     HeadingTrack: HeadingTrack
  81   };
  82 });