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