chrome/browser/resources/sync_internals/sync_node_browser.js

   1 // Copyright (c) 2011 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 // require: cr.js
   6 // require: cr/ui.js
   7 // require: cr/ui/tree.js
   8
   9 (function() {
  10   /**
  11    * A helper function to determine if a node is the root of its type.
  12    *
  13    * @param {!Object} node The node to check.
  14    */
  15   var isTypeRootNode = function(node) {
  16     return node.PARENT_ID == 'r' && node.UNIQUE_SERVER_TAG != '';
  17   };
  18
  19   /**
  20    * A helper function to determine if a node is a child of the given parent.
  21    *
  22    * @param {!Object} parent node.
  23    * @param {!Object} node The node to check.
  24    */
  25   var isChildOf = function(parentNode, node) {
  26     if (node.PARENT_ID != '') {
  27       return node.PARENT_ID == parentNode.ID;
  28     }
  29     else {
  30       return node.modelType == parentNode.modelType;
  31     }
  32   };
  33
  34   /**
  35    * A helper function to sort sync nodes.
  36    *
  37    * Sorts by position index if possible, falls back to sorting by name, and
  38    * finally sorting by METAHANDLE.
  39    *
  40    * If this proves to be slow and expensive, we should experiment with moving
  41    * this functionality to C++ instead.
  42    */
  43   var nodeComparator = function(nodeA, nodeB) {
  44     if (nodeA.hasOwnProperty('positionIndex') &&
  45         nodeB.hasOwnProperty('positionIndex')) {
  46       return nodeA.positionIndex - nodeB.positionIndex;
  47     } else if (nodeA.NON_UNIQUE_NAME != nodeB.NON_UNIQUE_NAME) {
  48       return nodeA.NON_UNIQUE_NAME.localeCompare(nodeB.NON_UNIQUE_NAME);
  49     } else {
  50       return nodeA.METAHANDLE - nodeB.METAHANDLE;
  51     }
  52   };
  53
  54   /**
  55    * Updates the node detail view with the details for the given node.
  56    * @param {!Object} node The struct representing the node we want to display.
  57    */
  58   function updateNodeDetailView(node) {
  59     var nodeDetailsView = $('node-details');
  60     nodeDetailsView.hidden = false;
  61     jstProcess(new JsEvalContext(node.entry_), nodeDetailsView);
  62   }
  63
  64   /**
  65    * Updates the 'Last refresh time' display.
  66    * @param {string} The text to display.
  67    */
  68   function setLastRefreshTime(str) {
  69     $('node-browser-refresh-time').textContent = str;
  70   }
  71
  72   /**
  73    * Creates a new sync node tree item.
  74    *
  75    * @constructor
  76    * @param {!Object} node The nodeDetails object for the node as returned by
  77    *     chrome.sync.getAllNodes().
  78    * @extends {cr.ui.TreeItem}
  79    */
  80   var SyncNodeTreeItem = function(node) {
  81     var treeItem = new cr.ui.TreeItem();
  82     treeItem.__proto__ = SyncNodeTreeItem.prototype;
  83
  84     treeItem.entry_ = node;
  85     treeItem.label = node.NON_UNIQUE_NAME;
  86     if (node.IS_DIR) {
  87       treeItem.mayHaveChildren_ = true;
  88
  89       // Load children on expand.
  90       treeItem.expanded_ = false;
  91       treeItem.addEventListener('expand',
  92                                 treeItem.handleExpand_.bind(treeItem));
  93     } else {
  94       treeItem.classList.add('leaf');
  95     }
  96     return treeItem;
  97   };
  98
  99   SyncNodeTreeItem.prototype = {
 100     __proto__: cr.ui.TreeItem.prototype,
 101
 102     /**
 103      * Finds the children of this node and appends them to the tree.
 104      */
 105     handleExpand_: function(event) {
 106       var treeItem = this;
 107
 108       if (treeItem.expanded_) {
 109         return;
 110       }
 111       treeItem.expanded_ = true;
 112
 113       var children = treeItem.tree.allNodes.filter(
 114           isChildOf.bind(undefined, treeItem.entry_));
 115       children.sort(nodeComparator);
 116
 117       children.forEach(function(node) {
 118         treeItem.add(new SyncNodeTreeItem(node));
 119       });
 120     },
 121   };
 122
 123   /**
 124    * Creates a new sync node tree.  Technically, it's a forest since it each
 125    * type has its own root node for its own tree, but it still looks and acts
 126    * mostly like a tree.
 127    *
 128    * @param {Object=} opt_propertyBag Optional properties.
 129    * @constructor
 130    * @extends {cr.ui.Tree}
 131    */
 132   var SyncNodeTree = cr.ui.define('tree');
 133
 134   SyncNodeTree.prototype = {
 135     __proto__: cr.ui.Tree.prototype,
 136
 137     decorate: function() {
 138       cr.ui.Tree.prototype.decorate.call(this);
 139       this.addEventListener('change', this.handleChange_.bind(this));
 140       this.allNodes = [];
 141     },
 142
 143     populate: function(nodes) {
 144       var tree = this;
 145
 146       // We store the full set of nodes in the SyncNodeTree object.
 147       tree.allNodes = nodes;
 148
 149       var roots = tree.allNodes.filter(isTypeRootNode);
 150       roots.sort(nodeComparator);
 151
 152       roots.forEach(function(typeRoot) {
 153         tree.add(new SyncNodeTreeItem(typeRoot));
 154       });
 155     },
 156
 157     handleChange_: function(event) {
 158       if (this.selectedItem) {
 159         updateNodeDetailView(this.selectedItem);
 160       }
 161     }
 162   };
 163
 164   /**
 165    * Clears any existing UI state.  Useful prior to a refresh.
 166    */
 167   function clear() {
 168     var treeContainer = $('sync-node-tree-container');
 169     while (treeContainer.firstChild) {
 170       treeContainer.removeChild(treeContainer.firstChild);
 171     }
 172
 173     var nodeDetailsView = $('node-details');
 174     nodeDetailsView.hidden = true;
 175   }
 176
 177   /**
 178    * Fetch the latest set of nodes and refresh the UI.
 179    */
 180   function refresh() {
 181     $('node-browser-refresh-button').disabled = true;
 182
 183     clear();
 184     setLastRefreshTime('In progress since ' + (new Date()).toLocaleString());
 185
 186     chrome.sync.getAllNodes(function(nodeMap) {
 187       // Put all nodes into one big list that ignores the type.
 188       var nodes = nodeMap.
 189           map(function(x) { return x.nodes; }).
 190           reduce(function(a, b) { return a.concat(b); });
 191
 192       var treeContainer = $('sync-node-tree-container');
 193       var tree = document.createElement('tree');
 194       tree.setAttribute('id', 'sync-node-tree');
 195       tree.setAttribute('icon-visibility', 'parent');
 196       treeContainer.appendChild(tree);
 197
 198       cr.ui.decorate(tree, SyncNodeTree);
 199       tree.populate(nodes);
 200
 201       setLastRefreshTime((new Date()).toLocaleString());
 202       $('node-browser-refresh-button').disabled = false;
 203     });
 204   }
 205
 206   document.addEventListener('DOMContentLoaded', function(e) {
 207     $('node-browser-refresh-button').addEventListener('click', refresh);
 208     cr.ui.decorate('#sync-node-splitter', cr.ui.Splitter);
 209
 210     // Automatically trigger a refresh the first time this tab is selected.
 211     $('sync-browser-tab').addEventListener('selectedChange', function f(e) {
 212       if (this.selected) {
 213         $('sync-browser-tab').removeEventListener('selectedChange', f);
 214         refresh();
 215       }
 216     });
 217   });
 218
 219 })();