components/proximity_auth/webui/resources/log-buffer.js

   1 // Copyright 2015 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 Polymer({
   6   is: 'log-buffer',
   7
   8   properties: {
   9     /**
  10      * List of displayed logs.
  11      * @type {?Array<{{
  12      *    text: string,
  13      *    time: string,
  14      *    file: string,
  15      *    line: number,
  16      *    severity: number,
  17      * }}>} LogMessage
  18      */
  19     logs: {
  20       type: Array,
  21       value: [],
  22       notify: true,
  23     }
  24   },
  25
  26   /**
  27    * Called when an instance is initialized.
  28    */
  29   ready: function() {
  30     // We assume that only one instance of log-buffer is ever created.
  31     LogBufferInterface = this;
  32     chrome.send('getLogMessages');
  33   },
  34
  35   // Clears the native LogBuffer.
  36   clearLogs: function() {
  37     chrome.send('clearLogBuffer');
  38   },
  39
  40   // Handles when a new log message is added.
  41   onLogMessageAdded: function(log) {
  42     this.push('logs', log);
  43   },
  44
  45   // Handles when the logs are cleared.
  46   onLogBufferCleared: function() {
  47     this.logs = [];
  48   },
  49
  50   // Handles when the logs are returned in response to the 'getLogMessages'
  51   // request.
  52   onGotLogMessages: function(logs) {
  53     this.logs = logs;
  54   }
  55 });
  56
  57 // Interface with the native WebUI component for LogBuffer events. The functions
  58 // contained in this object will be invoked by the browser for each operation
  59 // performed on the native LogBuffer.
  60 LogBufferInterface = {
  61   /**
  62    * Called when a new log message is added.
  63    * @type {function(LogMessage)}
  64    */
  65   onLogMessageAdded: function(log) {},
  66
  67   /**
  68    * Called when the log buffer is cleared.
  69    * @type {function()}
  70    */
  71   onLogBufferCleared: function() {},
  72
  73   /**
  74    * Called in response to chrome.send('getLogMessages') with the log messages
  75    * currently in the buffer.
  76    * @type {function(Array<LogMessage>)}
  77    */
  78   onGotLogMessages: function(messages) {},
  79 };