chrome/browser/resources/net_internals/prerender_view.js

   1 // Copyright (c) 2012 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 /**
   6  * This view displays information related to Prerendering.
   7  */
   8 var PrerenderView = (function() {
   9   'use strict';
  10
  11   // We inherit from DivView.
  12   var superClass = DivView;
  13
  14   /**
  15    * @constructor
  16    */
  17   function PrerenderView() {
  18     assertFirstConstructorCall(PrerenderView);
  19
  20     // Call superclass's constructor.
  21     superClass.call(this, PrerenderView.MAIN_BOX_ID);
  22
  23     g_browser.addPrerenderInfoObserver(this, true);
  24     this.prerenderEnabledSpan_ = $(PrerenderView.ENABLED_SPAN_ID);
  25     this.prerenderOmniboxEnabledSpan_ =
  26         $(PrerenderView.OMNIBOX_ENABLED_SPAN_ID);
  27     this.prerenderHistoryDiv_ = $(PrerenderView.HISTORY_DIV_ID);
  28     this.prerenderActiveDiv_ = $(PrerenderView.ACTIVE_DIV_ID);
  29   }
  30
  31   // ID for special HTML element in category_tabs.html
  32   PrerenderView.TAB_HANDLE_ID = 'tab-handle-prerender';
  33
  34   // IDs for special HTML elements in prerender_view.html
  35   PrerenderView.MAIN_BOX_ID = 'prerender-view-tab-content';
  36   PrerenderView.ENABLED_SPAN_ID = 'prerender-view-enabled-span';
  37   PrerenderView.OMNIBOX_ENABLED_SPAN_ID = 'prerender-view-omnibox-enabled-span';
  38   PrerenderView.HISTORY_DIV_ID = 'prerender-view-history-div';
  39   PrerenderView.ACTIVE_DIV_ID = 'prerender-view-active-div';
  40
  41   cr.addSingletonGetter(PrerenderView);
  42
  43   PrerenderView.prototype = {
  44     // Inherit the superclass's methods.
  45     __proto__: superClass.prototype,
  46
  47     onLoadLogFinish: function(data) {
  48       return this.onPrerenderInfoChanged(data.prerenderInfo);
  49     },
  50
  51     onPrerenderInfoChanged: function(prerenderInfo) {
  52       this.prerenderEnabledSpan_.textContent = '';
  53       this.prerenderOmniboxEnabledSpan_.textContent = '';
  54       this.prerenderHistoryDiv_.innerHTML = '';
  55       this.prerenderActiveDiv_.innerHTML = '';
  56
  57       if (prerenderInfo && ('enabled' in prerenderInfo)) {
  58         this.prerenderEnabledSpan_.textContent =
  59             prerenderInfo.enabled.toString();
  60         if (prerenderInfo.enabled_note) {
  61           this.prerenderEnabledSpan_.textContent +=
  62               ' ' + prerenderInfo.enabled_note;
  63         }
  64       }
  65
  66       if (prerenderInfo && ('omnibox_enabled' in prerenderInfo)) {
  67         this.prerenderOmniboxEnabledSpan_.textContent =
  68             prerenderInfo.omnibox_enabled.toString();
  69       }
  70
  71       if (!isValidPrerenderInfo(prerenderInfo))
  72         return false;
  73
  74       var tabPrinter = createHistoryTablePrinter(prerenderInfo.history);
  75       tabPrinter.toHTML(this.prerenderHistoryDiv_, 'styled-table');
  76
  77       var tabPrinter = createActiveTablePrinter(prerenderInfo.active);
  78       tabPrinter.toHTML(this.prerenderActiveDiv_, 'styled-table');
  79
  80       return true;
  81     }
  82   };
  83
  84   function isValidPrerenderInfo(prerenderInfo) {
  85     if (prerenderInfo == null) {
  86       return false;
  87     }
  88     if (!('history' in prerenderInfo) ||
  89         !('active' in prerenderInfo) ||
  90         !('enabled' in prerenderInfo)) {
  91       return false;
  92     }
  93     return true;
  94   }
  95
  96   function createHistoryTablePrinter(prerenderHistory) {
  97     var tablePrinter = new TablePrinter();
  98     tablePrinter.addHeaderCell('Origin');
  99     tablePrinter.addHeaderCell('URL');
 100     tablePrinter.addHeaderCell('Final Status');
 101     tablePrinter.addHeaderCell('Time');
 102
 103     for (var i = 0; i < prerenderHistory.length; i++) {
 104       var historyEntry = prerenderHistory[i];
 105       tablePrinter.addRow();
 106       tablePrinter.addCell(historyEntry.origin);
 107       tablePrinter.addCell(historyEntry.url);
 108       tablePrinter.addCell(historyEntry.final_status);
 109
 110       var date = new Date(parseInt(historyEntry.end_time));
 111       // TODO(eroman): Switch to addNodeWithDate()
 112       tablePrinter.addCell(timeutil.dateToString(date));
 113     }
 114     return tablePrinter;
 115   }
 116
 117   function createActiveTablePrinter(prerenderActive) {
 118     var tablePrinter = new TablePrinter();
 119     tablePrinter.addHeaderCell('URL');
 120     tablePrinter.addHeaderCell('Duration');
 121
 122     for (var i = 0; i < prerenderActive.length; i++) {
 123       var activeEntry = prerenderActive[i];
 124       tablePrinter.addRow();
 125       tablePrinter.addCell(activeEntry.url);
 126       tablePrinter.addCell(activeEntry.duration);
 127     }
 128     return tablePrinter;
 129   }
 130
 131   return PrerenderView;
 132 })();