chrome/browser/resources/device_log_ui/device_log_ui.js

   1 // Copyright 2014 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 var DeviceLogUI = (function() {
   6   'use strict';
   7
   8   /**
   9    * Creates a tag for the log level.
  10    *
  11    * @param {string} level A string that represents log level.
  12    * @return {HTMLSpanElement} The created span element.
  13    */
  14   var createLevelTag = function(level) {
  15     var levelClassName = 'log-level-' + level.toLowerCase();
  16     var tag = document.createElement('span');
  17     tag.textContent = level;
  18     tag.className = 'level-tag ' + levelClassName;
  19     return tag;
  20   };
  21
  22   /**
  23    * Creates a tag for the log type.
  24    *
  25    * @param {string} level A string that represents log type.
  26    * @return {HTMLSpanElement} The created span element.
  27    */
  28   var createTypeTag = function(type) {
  29     var typeClassName = 'log-type-' + type.toLowerCase();
  30     var tag = document.createElement('span');
  31     tag.textContent = type;
  32     tag.className = 'type-tag ' + typeClassName;
  33     return tag;
  34   };
  35
  36   /**
  37    * Creates an element that contains the time, the event, the level and
  38    * the description of the given log entry.
  39    *
  40    * @param {Object} logEntry An object that represents a single line of log.
  41    * @return {?HTMLParagraphElement} The created p element that represents
  42    *     the log entry, or null if the entry should be skipped.
  43    */
  44   var createLogEntryText = function(logEntry) {
  45     var level = logEntry['level'];
  46     var levelCheckbox = 'log-level-' + level.toLowerCase();
  47     if ($(levelCheckbox) && !$(levelCheckbox).checked)
  48       return null;
  49
  50     var type = logEntry['type'];
  51     var typeCheckbox = 'log-type-' + type.toLowerCase();
  52     if ($(typeCheckbox) && !$(typeCheckbox).checked)
  53       return null;
  54
  55     var res = document.createElement('p');
  56     var textWrapper = document.createElement('span');
  57     var fileinfo = '';
  58     if ($('log-fileinfo').checked)
  59       fileinfo = logEntry['file'];
  60     var timestamp = '';
  61     if ($('log-timedetail').checked)
  62       timestamp = logEntry['timestamp'];
  63     else
  64       timestamp = logEntry['timestampshort'];
  65     textWrapper.textContent = loadTimeData.getStringF(
  66       'logEntryFormat',
  67       timestamp,
  68       fileinfo,
  69       logEntry['event']);
  70     res.appendChild(createTypeTag(type));
  71     res.appendChild(createLevelTag(level));
  72     res.appendChild(textWrapper);
  73     return res;
  74   };
  75
  76   /**
  77    * Creates event log entries.
  78    *
  79    * @param {Array<string>} logEntries An array of strings that represent log
  80    *     log events in JSON format.
  81    */
  82   var createEventLog = function(logEntries) {
  83     var container = $('log-container');
  84     container.textContent = '';
  85     for (var i = 0; i < logEntries.length; ++i) {
  86       var entry = createLogEntryText(JSON.parse(logEntries[i]));
  87       if (entry)
  88         container.appendChild(entry);
  89     }
  90   };
  91
  92   /**
  93    * Callback function, triggered when the log is received.
  94    *
  95    * @param {Object} data A JSON structure of event log entries.
  96    */
  97   var getLogCallback = function(data) {
  98     createEventLog(JSON.parse(data));
  99   };
 100
 101   /**
 102    * Requests a log update.
 103    */
 104   var requestLog = function() {
 105     chrome.send('DeviceLog.getLog');
 106   };
 107
 108   /**
 109    * Sets refresh rate if the interval is found in the url.
 110    */
 111   var setRefresh = function() {
 112     var interval = parseQueryParams(window.location)['refresh'];
 113     if (interval && interval != '')
 114       setInterval(requestLog, parseInt(interval) * 1000);
 115   };
 116
 117   /**
 118    * Gets log information from WebUI.
 119    */
 120   document.addEventListener('DOMContentLoaded', function() {
 121     // Show all levels except 'debug' by default.
 122     $('log-level-error').checked = true;
 123     $('log-level-user').checked = true;
 124     $('log-level-event').checked = true;
 125     $('log-level-debug').checked = false;
 126
 127     // Show all types by default.
 128     var checkboxes = document.querySelectorAll(
 129         '#log-checkbox-container input[type="checkbox"][id*="log-type"]');
 130     for (var i = 0; i < checkboxes.length; ++i)
 131       checkboxes[i].checked = true;
 132
 133     $('log-fileinfo').checked = false;
 134     $('log-timedetail').checked = false;
 135
 136     $('log-refresh').onclick = requestLog;
 137     checkboxes = document.querySelectorAll(
 138         '#log-checkbox-container input[type="checkbox"]');
 139     for (var i = 0; i < checkboxes.length; ++i)
 140       checkboxes[i].onclick = requestLog;
 141
 142     setRefresh();
 143     requestLog();
 144   });
 145
 146   return {
 147     getLogCallback: getLogCallback
 148   };
 149 })();