chrome/browser/resources/sync_file_system_internals/dump_database.js

   1 // Copyright 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 /**
   6  * Handles DumpDatabase tab for syncfs-internals.
   7  */
   8 var DumpDatabase = (function() {
   9 'use strict';
  10
  11 var DumpDatabase = {};
  12
  13 /**
  14  * Get the database dump.
  15  */
  16 function getDatabaseDump() {
  17   chrome.send('getDatabaseDump');
  18 }
  19
  20 /**
  21  * Creates an element named |elementName| containing the content |text|.
  22  * @param {string} elementName Name of the new element to be created.
  23  * @param {string} text Text to be contained in the new element.
  24  * @return {HTMLElement} The newly created HTML element.
  25  */
  26 function createElementFromText(elementName, text) {
  27   var element = document.createElement(elementName);
  28   element.appendChild(document.createTextNode(text));
  29   return element;
  30 }
  31
  32 /**
  33  * Creates a table by filling |header| and |body|.
  34  * @param {HTMLElement} div The outer container of the table to be renderered.
  35  * @param {HTMLElement} header The table header element to be fillied by
  36  *     this function.
  37  * @param {HTMLElement} body The table body element to be filled by this
  38  *     function.
  39  * @param {Array} databaseDump List of dictionaries for the database dump.
  40  *     The first element must have metadata of the entry.
  41  *     The remaining elements must be dictionaries for the database dump,
  42  *     which can be iterated using the 'keys' fields given by the first
  43  *     element.
  44  */
  45 function createDatabaseDumpTable(div, header, body, databaseDump) {
  46   var metadata = databaseDump.shift();
  47   div.appendChild(createElementFromText('h3', metadata['title']));
  48
  49   var tr = document.createElement('tr');
  50   for (var i = 0; i < metadata.keys.length; ++i)
  51     tr.appendChild(createElementFromText('td', metadata.keys[i]));
  52   header.appendChild(tr);
  53
  54   for (var i = 0; i < databaseDump.length; i++) {
  55     var entry = databaseDump[i];
  56     var tr = document.createElement('tr');
  57     for (var k = 0; k < metadata.keys.length; ++k)
  58       tr.appendChild(createElementFromText('td', entry[metadata.keys[k]]));
  59     body.appendChild(tr);
  60   }
  61 }
  62
  63 /**
  64  * Handles callback from onGetDatabaseDump.
  65  * @param {Array} databaseDump List of lists for the database dump.
  66  */
  67 DumpDatabase.onGetDatabaseDump = function(databaseDump) {
  68   var placeholder = $('dump-database-placeholder');
  69   placeholder.innerHTML = '';
  70   for (var i = 0; i < databaseDump.length; ++i) {
  71     var div = document.createElement('div');
  72     var table = document.createElement('table');
  73     var header = document.createElement('thead');
  74     var body = document.createElement('tbody');
  75     createDatabaseDumpTable(div, header, body, databaseDump[i]);
  76     table.appendChild(header);
  77     table.appendChild(body);
  78     div.appendChild(table);
  79     placeholder.appendChild(div);
  80   }
  81 }
  82
  83 function main() {
  84   getDatabaseDump();
  85   $('refresh-database-dump').addEventListener('click', getDatabaseDump);
  86 }
  87
  88 document.addEventListener('DOMContentLoaded', main);
  89 return DumpDatabase;
  90 })();