chrome/browser/resources/sync_file_system_internals/file_metadata.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  * WebUI to monitor File Metadata per Extension ID.
   7  */
   8 var FileMetadata = (function() {
   9 'use strict';
  10
  11 var FileMetadata = {};
  12
  13 /**
  14  * Gets extension data so the select drop down can be filled.
  15  */
  16 function getExtensions() {
  17   chrome.send('getExtensions');
  18 }
  19
  20 /**
  21  * Renders result of getFileMetadata as a table.
  22  * @param {Array} list of dictionaries containing 'extensionName',
  23  *     'extensionID', 'status'.
  24  */
  25 FileMetadata.onGetExtensions = function(extensionStatuses) {
  26   var select = $('extensions-select');
  27
  28   // Record existing drop down extension ID. If it's still there after the
  29   // refresh then keep it as the selected value.
  30   var oldSelectedExtension = getSelectedExtensionId();
  31
  32   select.textContent = '';
  33   for (var i = 0; i < extensionStatuses.length; i++) {
  34     var originEntry = extensionStatuses[i];
  35     var tr = document.createElement('tr');
  36     var title = originEntry.extensionName + ' [' + originEntry.status + ']';
  37     select.options.add(new Option(title, originEntry.extensionID));
  38
  39     // If option was the previously only selected, make it selected again.
  40     if (originEntry.extensionID != oldSelectedExtension)
  41       continue;
  42     select.options[select.options.length - 1].selected = true;
  43   }
  44
  45   // After drop down has been loaded with options, file metadata can be loaded
  46   getFileMetadata();
  47 }
  48
  49 /**
  50  * @return {string} extension ID that's currently selected in drop down box.
  51  */
  52 function getSelectedExtensionId() {
  53   var dropDown = $('extensions-select').options;
  54   if (dropDown.selectedIndex >= 0)
  55     return dropDown[dropDown.selectedIndex].value;
  56
  57   return null;
  58 }
  59
  60 /**
  61  * Get File Metadata depending on which extension is selected from the drop down
  62  * if any.
  63  */
  64 function getFileMetadata() {
  65   var dropDown = $('extensions-select');
  66   if (dropDown.options.length === 0) {
  67     $('file-metadata-header').textContent = '';
  68     $('file-metadata-entries').textContent = 'No file metadata available.';
  69     return;
  70   }
  71
  72   var selectedExtensionId = getSelectedExtensionId();
  73   chrome.send('getFileMetadata', [selectedExtensionId]);
  74 }
  75
  76 /**
  77  * Renders result of getFileMetadata as a table.
  78  */
  79 FileMetadata.onGetFileMetadata = function(fileMetadataMap) {
  80   var header = $('file-metadata-header');
  81   // Only draw the header if it hasn't been drawn yet
  82   if (header.children.length === 0) {
  83     var tr = document.createElement('tr');
  84     tr.appendChild(createElementFromText('td', 'Type'));
  85     tr.appendChild(createElementFromText('td', 'Status'));
  86     tr.appendChild(createElementFromText('td', 'Path', {width: '250px'}));
  87     tr.appendChild(createElementFromText('td', 'Details'));
  88     header.appendChild(tr);
  89   }
  90
  91   // Add row entries.
  92   var itemContainer = $('file-metadata-entries');
  93   itemContainer.textContent = '';
  94   for (var i = 0; i < fileMetadataMap.length; i++) {
  95     var metadatEntry = fileMetadataMap[i];
  96     var tr = document.createElement('tr');
  97     tr.appendChild(createFileIconCell(metadatEntry.type));
  98     tr.appendChild(createElementFromText('td', metadatEntry.status));
  99     tr.appendChild(createElementFromText('td', metadatEntry.path));
 100     tr.appendChild(createElementFromDictionary('td', metadatEntry.details));
 101     itemContainer.appendChild(tr);
 102   }
 103 }
 104
 105 /**
 106  * @param {string} file type string.
 107  * @return {HTMLElement} TD with file or folder icon depending on type.
 108  */
 109 function createFileIconCell(type) {
 110   var td = createElementFromText('td', type);
 111   td.setAttribute('class', type.toLowerCase() + '-icon');
 112   return td;
 113 }
 114
 115 function main() {
 116   getExtensions();
 117   $('refresh-metadata-button').addEventListener('click', getExtensions);
 118   $('extensions-select').addEventListener('change', getFileMetadata);
 119 }
 120
 121 document.addEventListener('DOMContentLoaded', main);
 122 return FileMetadata;
 123 })();