Add Basilisk

1 files changed, 1723 insertions, 0 deletions

diff --git a/application/basilisk/components/places/content/controller.js b/application/basilisk/components/places/content/controller.js
new file mode 100644
index 000000000..5f83c741e
--- /dev/null
+++ b/application/basilisk/components/places/content/controller.js
@@ -0,0 +1,1723 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+XPCOMUtils.defineLazyModuleGetter(this, "ForgetAboutSite",
+                                  "resource://gre/modules/ForgetAboutSite.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "NetUtil",
+                                  "resource://gre/modules/NetUtil.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
+                                  "resource://gre/modules/PrivateBrowsingUtils.jsm");
+
+// XXXmano: we should move most/all of these constants to PlacesUtils
+const ORGANIZER_ROOT_BOOKMARKS = "place:folder=BOOKMARKS_MENU&excludeItems=1&queryType=1";
+
+// No change to the view, preserve current selection
+const RELOAD_ACTION_NOTHING = 0;
+// Inserting items new to the view, select the inserted rows
+const RELOAD_ACTION_INSERT = 1;
+// Removing items from the view, select the first item after the last selected
+const RELOAD_ACTION_REMOVE = 2;
+// Moving items within a view, don't treat the dropped items as additional
+// rows.
+const RELOAD_ACTION_MOVE = 3;
+
+// When removing a bunch of pages we split them in chunks to give some breath
+// to the main-thread.
+const REMOVE_PAGES_CHUNKLEN = 300;
+
+/**
+ * Represents an insertion point within a container where we can insert
+ * items.
+ * @param   aItemId
+ *          The identifier of the parent container
+ * @param   aIndex
+ *          The index within the container where we should insert
+ * @param   aOrientation
+ *          The orientation of the insertion. NOTE: the adjustments to the
+ *          insertion point to accommodate the orientation should be done by
+ *          the person who constructs the IP, not the user. The orientation
+ *          is provided for informational purposes only!
+ * @param   [optional] aTag
+ *          The tag name if this IP is set to a tag, null otherwise.
+ * @param   [optional] aDropNearItemId
+ *          When defined we will calculate index based on this itemId
+ * @constructor
+ */
+function InsertionPoint(aItemId, aIndex, aOrientation, aTagName = null,
+                        aDropNearItemId = false) {
+  this.itemId = aItemId;
+  this._index = aIndex;
+  this.orientation = aOrientation;
+  this.tagName = aTagName;
+  this.dropNearItemId = aDropNearItemId;
+}
+
+InsertionPoint.prototype = {
+  set index(val) {
+    return this._index = val;
+  },
+
+  promiseGuid() {
+    return PlacesUtils.promiseItemGuid(this.itemId);
+  },
+
+  get index() {
+    if (this.dropNearItemId > 0) {
+      // If dropNearItemId is set up we must calculate the real index of
+      // the item near which we will drop.
+      var index = PlacesUtils.bookmarks.getItemIndex(this.dropNearItemId);
+      return this.orientation == Ci.nsITreeView.DROP_BEFORE ? index : index + 1;
+    }
+    return this._index;
+  },
+
+  get isTag() {
+    return typeof(this.tagName) == "string";
+  }
+};
+
+/**
+ * Places Controller
+ */
+
+function PlacesController(aView) {
+  this._view = aView;
+  XPCOMUtils.defineLazyServiceGetter(this, "clipboard",
+                                     "@mozilla.org/widget/clipboard;1",
+                                     "nsIClipboard");
+  XPCOMUtils.defineLazyGetter(this, "profileName", function() {
+    return Services.dirsvc.get("ProfD", Ci.nsIFile).leafName;
+  });
+
+  this._cachedLivemarkInfoObjects = new Map();
+}
+
+PlacesController.prototype = {
+  /**
+   * The places view.
+   */
+  _view: null,
+
+  QueryInterface: XPCOMUtils.generateQI([
+    Ci.nsIClipboardOwner
+  ]),
+
+  // nsIClipboardOwner
+  LosingOwnership: function PC_LosingOwnership(aXferable) {
+    this.cutNodes = [];
+  },
+
+  terminate: function PC_terminate() {
+    this._releaseClipboardOwnership();
+  },
+
+  supportsCommand: function PC_supportsCommand(aCommand) {
+    // Non-Places specific commands that we also support
+    switch (aCommand) {
+    case "cmd_undo":
+    case "cmd_redo":
+    case "cmd_cut":
+    case "cmd_copy":
+    case "cmd_paste":
+    case "cmd_delete":
+    case "cmd_selectAll":
+      return true;
+    }
+
+    // All other Places Commands are prefixed with "placesCmd_" ... this
+    // filters out other commands that we do _not_ support (see 329587).
+    const CMD_PREFIX = "placesCmd_";
+    return (aCommand.substr(0, CMD_PREFIX.length) == CMD_PREFIX);
+  },
+
+  isCommandEnabled: function PC_isCommandEnabled(aCommand) {
+    switch (aCommand) {
+    case "cmd_undo":
+      if (!PlacesUIUtils.useAsyncTransactions)
+        return PlacesUtils.transactionManager.numberOfUndoItems > 0;
+
+      return PlacesTransactions.topUndoEntry != null;
+    case "cmd_redo":
+      if (!PlacesUIUtils.useAsyncTransactions)
+        return PlacesUtils.transactionManager.numberOfRedoItems > 0;
+
+      return PlacesTransactions.topRedoEntry != null;
+    case "cmd_cut":
+    case "placesCmd_cut":
+    case "placesCmd_moveBookmarks":
+      for (let node of this._view.selectedNodes) {
+        // If selection includes history nodes or tags-as-bookmark, disallow
+        // cutting.
+        if (node.itemId == -1 ||
+            (node.parent && PlacesUtils.nodeIsTagQuery(node.parent))) {
+          return false;
+        }
+      }
+      // Otherwise fall through the cmd_delete check.
+    case "cmd_delete":
+    case "placesCmd_delete":
+    case "placesCmd_deleteDataHost":
+      return this._hasRemovableSelection();
+    case "cmd_copy":
+    case "placesCmd_copy":
+      return this._view.hasSelection;
+    case "cmd_paste":
+    case "placesCmd_paste":
+      return this._canInsert(true) && this._isClipboardDataPasteable();
+    case "cmd_selectAll":
+      if (this._view.selType != "single") {
+        let rootNode = this._view.result.root;
+        if (rootNode.containerOpen && rootNode.childCount > 0)
+          return true;
+      }
+      return false;
+    case "placesCmd_open":
+    case "placesCmd_open:window":
+    case "placesCmd_open:privatewindow":
+    case "placesCmd_open:tab": {
+      let selectedNode = this._view.selectedNode;
+      return selectedNode && PlacesUtils.nodeIsURI(selectedNode);
+    }
+    case "placesCmd_new:folder":
+      return this._canInsert();
+    case "placesCmd_new:bookmark":
+      return this._canInsert();
+    case "placesCmd_new:separator":
+      return this._canInsert() &&
+             !PlacesUtils.asQuery(this._view.result.root).queryOptions.excludeItems &&
+             this._view.result.sortingMode ==
+                 Ci.nsINavHistoryQueryOptions.SORT_BY_NONE;
+    case "placesCmd_show:info": {
+      let selectedNode = this._view.selectedNode;
+      return selectedNode && PlacesUtils.getConcreteItemId(selectedNode) != -1
+    }
+    case "placesCmd_reload": {
+      // Livemark containers
+      let selectedNode = this._view.selectedNode;
+      return selectedNode && this.hasCachedLivemarkInfo(selectedNode);
+    }
+    case "placesCmd_sortBy:name": {
+      let selectedNode = this._view.selectedNode;
+      return selectedNode &&
+             PlacesUtils.nodeIsFolder(selectedNode) &&
+             !PlacesUIUtils.isContentsReadOnly(selectedNode) &&
+             this._view.result.sortingMode ==
+                 Ci.nsINavHistoryQueryOptions.SORT_BY_NONE;
+    }
+    case "placesCmd_createBookmark":
+      var node = this._view.selectedNode;
+      return node && PlacesUtils.nodeIsURI(node) && node.itemId == -1;
+    default:
+      return false;
+    }
+  },
+
+  doCommand: function PC_doCommand(aCommand) {
+    switch (aCommand) {
+    case "cmd_undo":
+      if (!PlacesUIUtils.useAsyncTransactions) {
+        PlacesUtils.transactionManager.undoTransaction();
+        return;
+      }
+      PlacesTransactions.undo().then(null, Components.utils.reportError);
+      break;
+    case "cmd_redo":
+      if (!PlacesUIUtils.useAsyncTransactions) {
+        PlacesUtils.transactionManager.redoTransaction();
+        return;
+      }
+      PlacesTransactions.redo().then(null, Components.utils.reportError);
+      break;
+    case "cmd_cut":
+    case "placesCmd_cut":
+      this.cut();
+      break;
+    case "cmd_copy":
+    case "placesCmd_copy":
+      this.copy();
+      break;
+    case "cmd_paste":
+    case "placesCmd_paste":
+      this.paste().then(null, Components.utils.reportError);
+      break;
+    case "cmd_delete":
+    case "placesCmd_delete":
+      this.remove("Remove Selection").then(null, Components.utils.reportError);
+      break;
+    case "placesCmd_deleteDataHost":
+      var host;
+      if (PlacesUtils.nodeIsHost(this._view.selectedNode)) {
+        var queries = this._view.selectedNode.getQueries();
+        host = queries[0].domain;
+      } else
+        host = NetUtil.newURI(this._view.selectedNode.uri).host;
+      ForgetAboutSite.removeDataFromDomain(host)
+                     .catch(Components.utils.reportError);
+      break;
+    case "cmd_selectAll":
+      this.selectAll();
+      break;
+    case "placesCmd_open":
+      PlacesUIUtils.openNodeIn(this._view.selectedNode, "current", this._view);
+      break;
+    case "placesCmd_open:window":
+      PlacesUIUtils.openNodeIn(this._view.selectedNode, "window", this._view);
+      break;
+    case "placesCmd_open:privatewindow":
+      PlacesUIUtils.openNodeIn(this._view.selectedNode, "window", this._view, true);
+      break;
+    case "placesCmd_open:tab":
+      PlacesUIUtils.openNodeIn(this._view.selectedNode, "tab", this._view);
+      break;
+    case "placesCmd_new:folder":
+      this.newItem("folder");
+      break;
+    case "placesCmd_new:bookmark":
+      this.newItem("bookmark");
+      break;
+    case "placesCmd_new:separator":
+      this.newSeparator().catch(Components.utils.reportError);
+      break;
+    case "placesCmd_show:info":
+      this.showBookmarkPropertiesForSelection();
+      break;
+    case "placesCmd_moveBookmarks":
+      this.moveSelectedBookmarks();
+      break;
+    case "placesCmd_reload":
+      this.reloadSelectedLivemark();
+      break;
+    case "placesCmd_sortBy:name":
+      this.sortFolderByName().then(null, Components.utils.reportError);
+      break;
+    case "placesCmd_createBookmark":
+      let node = this._view.selectedNode;
+      PlacesUIUtils.showBookmarkDialog({ action: "add"
+                                       , type: "bookmark"
+                                       , hiddenRows: [ "description"
+                                                     , "keyword"
+                                                     , "location"
+                                                     , "loadInSidebar" ]
+                                       , uri: NetUtil.newURI(node.uri)
+                                       , title: node.title
+                                       }, window.top);
+      break;
+    }
+  },
+
+  onEvent: function PC_onEvent(eventName) { },
+
+
+  /**
+   * Determine whether or not the selection can be removed, either by the
+   * delete or cut operations based on whether or not any of its contents
+   * are non-removable. We don't need to worry about recursion here since it
+   * is a policy decision that a removable item not be placed inside a non-
+   * removable item.
+   *
+   * @return true if all nodes in the selection can be removed,
+   *         false otherwise.
+   */
+  _hasRemovableSelection() {
+    var ranges = this._view.removableSelectionRanges;
+    if (!ranges.length)
+      return false;
+
+    var root = this._view.result.root;
+
+    for (var j = 0; j < ranges.length; j++) {
+      var nodes = ranges[j];
+      for (var i = 0; i < nodes.length; ++i) {
+        // Disallow removing the view's root node
+        if (nodes[i] == root)
+          return false;
+
+        if (!PlacesUIUtils.canUserRemove(nodes[i]))
+          return false;
+      }
+    }
+
+    return true;
+  },
+
+  /**
+   * Determines whether or not nodes can be inserted relative to the selection.
+   */
+  _canInsert: function PC__canInsert(isPaste) {
+    var ip = this._view.insertionPoint;
+    return ip != null && (isPaste || ip.isTag != true);
+  },
+
+  /**
+   * Looks at the data on the clipboard to see if it is paste-able.
+   * Paste-able data is:
+   *   - in a format that the view can receive
+   * @return true if: - clipboard data is of a TYPE_X_MOZ_PLACE_* flavor,
+   *                  - clipboard data is of type TEXT_UNICODE and
+   *                    is a valid URI.
+   */
+  _isClipboardDataPasteable: function PC__isClipboardDataPasteable() {
+    // if the clipboard contains TYPE_X_MOZ_PLACE_* data, it is definitely
+    // pasteable, with no need to unwrap all the nodes.
+
+    var flavors = PlacesUIUtils.PLACES_FLAVORS;
+    var clipboard = this.clipboard;
+    var hasPlacesData =
+      clipboard.hasDataMatchingFlavors(flavors, flavors.length,
+                                       Ci.nsIClipboard.kGlobalClipboard);
+    if (hasPlacesData)
+      return this._view.insertionPoint != null;
+
+    // if the clipboard doesn't have TYPE_X_MOZ_PLACE_* data, we also allow
+    // pasting of valid "text/unicode" and "text/x-moz-url" data
+    var xferable = Cc["@mozilla.org/widget/transferable;1"].
+                   createInstance(Ci.nsITransferable);
+    xferable.init(null);
+
+    xferable.addDataFlavor(PlacesUtils.TYPE_X_MOZ_URL);
+    xferable.addDataFlavor(PlacesUtils.TYPE_UNICODE);
+    clipboard.getData(xferable, Ci.nsIClipboard.kGlobalClipboard);
+
+    try {
+      // getAnyTransferData will throw if no data is available.
+      var data = { }, type = { };
+      xferable.getAnyTransferData(type, data, { });
+      data = data.value.QueryInterface(Ci.nsISupportsString).data;
+      if (type.value != PlacesUtils.TYPE_X_MOZ_URL &&
+          type.value != PlacesUtils.TYPE_UNICODE)
+        return false;
+
+      // unwrapNodes() will throw if the data blob is malformed.
+      PlacesUtils.unwrapNodes(data, type.value);
+      return this._view.insertionPoint != null;
+    } catch (e) {
+      // getAnyTransferData or unwrapNodes failed
+      return false;
+    }
+  },
+
+  /**
+   * Gathers information about the selected nodes according to the following
+   * rules:
+   *    "link"              node is a URI
+   *    "bookmark"          node is a bookmark
+   *    "livemarkChild"     node is a child of a livemark
+   *    "tagChild"          node is a child of a tag
+   *    "folder"            node is a folder
+   *    "query"             node is a query
+   *    "separator"         node is a separator line
+   *    "host"              node is a host
+   *
+   * @return an array of objects corresponding the selected nodes. Each
+   *         object has each of the properties above set if its corresponding
+   *         node matches the rule. In addition, the annotations names for each
+   *         node are set on its corresponding object as properties.
+   * Notes:
+   *   1) This can be slow, so don't call it anywhere performance critical!
+   */
+  _buildSelectionMetadata: function PC__buildSelectionMetadata() {
+    var metadata = [];
+    var nodes = this._view.selectedNodes;
+
+    for (var i = 0; i < nodes.length; i++) {
+      var nodeData = {};
+      var node = nodes[i];
+      var nodeType = node.type;
+      var uri = null;
+
+      // We don't use the nodeIs* methods here to avoid going through the type
+      // property way too often
+      switch (nodeType) {
+        case Ci.nsINavHistoryResultNode.RESULT_TYPE_QUERY:
+          nodeData["query"] = true;
+          if (node.parent) {
+            switch (PlacesUtils.asQuery(node.parent).queryOptions.resultType) {
+              case Ci.nsINavHistoryQueryOptions.RESULTS_AS_SITE_QUERY:
+                nodeData["host"] = true;
+                break;
+              case Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_SITE_QUERY:
+              case Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_QUERY:
+                nodeData["day"] = true;
+                break;
+            }
+          }
+          break;
+        case Ci.nsINavHistoryResultNode.RESULT_TYPE_FOLDER:
+        case Ci.nsINavHistoryResultNode.RESULT_TYPE_FOLDER_SHORTCUT:
+          nodeData["folder"] = true;
+          break;
+        case Ci.nsINavHistoryResultNode.RESULT_TYPE_SEPARATOR:
+          nodeData["separator"] = true;
+          break;
+        case Ci.nsINavHistoryResultNode.RESULT_TYPE_URI:
+          nodeData["link"] = true;
+          uri = NetUtil.newURI(node.uri);
+          if (PlacesUtils.nodeIsBookmark(node)) {
+            nodeData["bookmark"] = true;
+            var parentNode = node.parent;
+            if (parentNode) {
+              if (PlacesUtils.nodeIsTagQuery(parentNode))
+                nodeData["tagChild"] = true;
+              else if (this.hasCachedLivemarkInfo(parentNode))
+                nodeData["livemarkChild"] = true;
+            }
+          }
+          break;
+      }
+
+      // annotations
+      if (uri) {
+        let names = PlacesUtils.annotations.getPageAnnotationNames(uri);
+        for (let j = 0; j < names.length; ++j)
+          nodeData[names[j]] = true;
+      }
+
+      // For items also include the item-specific annotations
+      if (node.itemId != -1) {
+        let names = PlacesUtils.annotations
+                               .getItemAnnotationNames(node.itemId);
+        for (let j = 0; j < names.length; ++j)
+          nodeData[names[j]] = true;
+      }
+      metadata.push(nodeData);
+    }
+
+    return metadata;
+  },
+
+  /**
+   * Determines if a context-menu item should be shown
+   * @param   aMenuItem
+   *          the context menu item
+   * @param   aMetaData
+   *          meta data about the selection
+   * @return true if the conditions (see buildContextMenu) are satisfied
+   *         and the item can be displayed, false otherwise.
+   */
+  _shouldShowMenuItem: function PC__shouldShowMenuItem(aMenuItem, aMetaData) {
+    var selectiontype = aMenuItem.getAttribute("selectiontype");
+    if (!selectiontype) {
+      selectiontype = "single|multiple";
+    }
+    var selectionTypes = selectiontype.split("|");
+    if (selectionTypes.includes("any")) {
+      return true;
+    }
+    var count = aMetaData.length;
+    if (count > 1 && !selectionTypes.includes("multiple"))
+      return false;
+    if (count == 1 && !selectionTypes.includes("single"))
+      return false;
+    // NB: if there is no selection, we show the item if and only if
+    // the selectiontype includes 'none' - the metadata list will be
+    // empty so none of the other criteria will apply anyway.
+    if (count == 0)
+      return selectionTypes.includes("none");
+
+    var forceHideAttr = aMenuItem.getAttribute("forcehideselection");
+    if (forceHideAttr) {
+      var forceHideRules = forceHideAttr.split("|");
+      for (let i = 0; i < aMetaData.length; ++i) {
+        for (let j = 0; j < forceHideRules.length; ++j) {
+          if (forceHideRules[j] in aMetaData[i])
+            return false;
+        }
+      }
+    }
+
+    var selectionAttr = aMenuItem.getAttribute("selection");
+    if (!selectionAttr) {
+      return !aMenuItem.hidden;
+    }
+
+    if (selectionAttr == "any")
+      return true;
+
+    var showRules = selectionAttr.split("|");
+    var anyMatched = false;
+    function metaDataNodeMatches(metaDataNode, rules) {
+      for (var i = 0; i < rules.length; i++) {
+        if (rules[i] in metaDataNode)
+          return true;
+      }
+      return false;
+    }
+
+    for (var i = 0; i < aMetaData.length; ++i) {
+      if (metaDataNodeMatches(aMetaData[i], showRules))
+        anyMatched = true;
+      else
+        return false;
+    }
+    return anyMatched;
+  },
+
+  /**
+   * Detects information (meta-data rules) about the current selection in the
+   * view (see _buildSelectionMetadata) and sets the visibility state for each
+   * of the menu-items in the given popup with the following rules applied:
+   *  0) The "ignoreitem" attribute may be set to "true" for this code not to
+   *     handle that menuitem.
+   *  1) The "selectiontype" attribute may be set on a menu-item to "single"
+   *     if the menu-item should be visible only if there is a single node
+   *     selected, or to "multiple" if the menu-item should be visible only if
+   *     multiple nodes are selected, or to "none" if the menuitems should be
+   *     visible for if there are no selected nodes, or to a |-separated
+   *     combination of these.
+   *     If the attribute is not set or set to an invalid value, the menu-item
+   *     may be visible irrespective of the selection.
+   *  2) The "selection" attribute may be set on a menu-item to the various
+   *     meta-data rules for which it may be visible. The rules should be
+   *     separated with the | character.
+   *  3) A menu-item may be visible only if at least one of the rules set in
+   *     its selection attribute apply to each of the selected nodes in the
+   *     view.
+   *  4) The "forcehideselection" attribute may be set on a menu-item to rules
+   *     for which it should be hidden. This attribute takes priority over the
+   *     selection attribute. A menu-item would be hidden if at least one of the
+   *     given rules apply to one of the selected nodes. The rules should be
+   *     separated with the | character.
+   *  5) The "hideifnoinsertionpoint" attribute may be set on a menu-item to
+   *     true if it should be hidden when there's no insertion point
+   *  6) The visibility state of a menu-item is unchanged if none of these
+   *     attribute are set.
+   *  7) These attributes should not be set on separators for which the
+   *     visibility state is "auto-detected."
+   *  8) The "hideifprivatebrowsing" attribute may be set on a menu-item to
+   *     true if it should be hidden inside the private browsing mode
+   * @param   aPopup
+   *          The menupopup to build children into.
+   * @return true if at least one item is visible, false otherwise.
+   */
+  buildContextMenu: function PC_buildContextMenu(aPopup) {
+    var metadata = this._buildSelectionMetadata();
+    var ip = this._view.insertionPoint;
+    var noIp = !ip || ip.isTag;
+
+    var separator = null;
+    var visibleItemsBeforeSep = false;
+    var usableItemCount = 0;
+    for (var i = 0; i < aPopup.childNodes.length; ++i) {
+      var item = aPopup.childNodes[i];
+      if (item.getAttribute("ignoreitem") == "true") {
+        continue;
+      }
+      if (item.localName != "menuseparator") {
+        // We allow pasting into tag containers, so special case that.
+        var hideIfNoIP = item.getAttribute("hideifnoinsertionpoint") == "true" &&
+                         noIp && !(ip && ip.isTag && item.id == "placesContext_paste");
+        var hideIfPrivate = item.getAttribute("hideifprivatebrowsing") == "true" &&
+                            PrivateBrowsingUtils.isWindowPrivate(window);
+        var shouldHideItem = hideIfNoIP || hideIfPrivate ||
+                             !this._shouldShowMenuItem(item, metadata);
+        item.hidden = item.disabled = shouldHideItem;
+
+        if (!item.hidden) {
+          visibleItemsBeforeSep = true;
+          usableItemCount++;
+
+          // Show the separator above the menu-item if any
+          if (separator) {
+            separator.hidden = false;
+            separator = null;
+          }
+        }
+      } else { // menuseparator
+        // Initially hide it. It will be unhidden if there will be at least one
+        // visible menu-item above and below it.
+        item.hidden = true;
+
+        // We won't show the separator at all if no items are visible above it
+        if (visibleItemsBeforeSep)
+          separator = item;
+
+        // New separator, count again:
+        visibleItemsBeforeSep = false;
+      }
+    }
+
+    // Set Open Folder/Links In Tabs items enabled state if they're visible
+    if (usableItemCount > 0) {
+      var openContainerInTabsItem = document.getElementById("placesContext_openContainer:tabs");
+      if (!openContainerInTabsItem.hidden) {
+        var containerToUse = this._view.selectedNode || this._view.result.root;
+        if (PlacesUtils.nodeIsContainer(containerToUse)) {
+          if (!PlacesUtils.hasChildURIs(containerToUse)) {
+            openContainerInTabsItem.disabled = true;
+            // Ensure that we don't display the menu if nothing is enabled:
+            usableItemCount--;
+          }
+        }
+      }
+    }
+
+    // Make sure correct PluralForms are diplayed when multiple pages are selected.
+    var deleteHistoryItem = document.getElementById("placesContext_delete_history");
+    deleteHistoryItem.label = PlacesUIUtils.getPluralString("cmd.deletePages.label",
+                                                            metadata.length);
+    deleteHistoryItem.accessKey = PlacesUIUtils.getString("cmd.deletePages.accesskey");
+    var createBookmarkItem = document.getElementById("placesContext_createBookmark");
+    createBookmarkItem.label = PlacesUIUtils.getPluralString("cmd.bookmarkPages.label",
+                                                             metadata.length);
+    createBookmarkItem.accessKey = PlacesUIUtils.getString("cmd.bookmarkPages.accesskey");
+
+    return usableItemCount > 0;
+  },
+
+  /**
+   * Select all links in the current view.
+   */
+  selectAll: function PC_selectAll() {
+    this._view.selectAll();
+  },
+
+  /**
+   * Opens the bookmark properties for the selected URI Node.
+   */
+  showBookmarkPropertiesForSelection() {
+    let node = this._view.selectedNode;
+    if (!node)
+      return;
+
+    PlacesUIUtils.showBookmarkDialog({ action: "edit"
+                                     , node
+                                     , hiddenRows: [ "folderPicker" ]
+                                     }, window.top);
+  },
+
+  /**
+   * This method can be run on a URI parameter to ensure that it didn't
+   * receive a string instead of an nsIURI object.
+   */
+  _assertURINotString: function PC__assertURINotString(value) {
+    NS_ASSERT((typeof(value) == "object") && !(value instanceof String),
+           "This method should be passed a URI as a nsIURI object, not as a string.");
+  },
+
+  /**
+   * Reloads the selected livemark if any.
+   */
+  reloadSelectedLivemark: function PC_reloadSelectedLivemark() {
+    var selectedNode = this._view.selectedNode;
+    if (selectedNode) {
+      let itemId = selectedNode.itemId;
+      PlacesUtils.livemarks.getLivemark({ id: itemId })
+        .then(aLivemark => {
+          aLivemark.reload(true);
+        }, Components.utils.reportError);
+    }
+  },
+
+  /**
+   * Opens the links in the selected folder, or the selected links in new tabs.
+   */
+  openSelectionInTabs: function PC_openLinksInTabs(aEvent) {
+    var node = this._view.selectedNode;
+    var nodes = this._view.selectedNodes;
+    // In the case of no selection, open the root node:
+    if (!node && !nodes.length) {
+      node = this._view.result.root;
+    }
+    if (node && PlacesUtils.nodeIsContainer(node))
+      PlacesUIUtils.openContainerNodeInTabs(node, aEvent, this._view);
+    else
+      PlacesUIUtils.openURINodesInTabs(nodes, aEvent, this._view);
+  },
+
+  /**
+   * Shows the Add Bookmark UI for the current insertion point.
+   *
+   * @param aType
+   *        the type of the new item (bookmark/livemark/folder)
+   */
+  newItem: function PC_newItem(aType) {
+    let ip = this._view.insertionPoint;
+    if (!ip)
+      throw Cr.NS_ERROR_NOT_AVAILABLE;
+
+    let performed =
+      PlacesUIUtils.showBookmarkDialog({ action: "add"
+                                       , type: aType
+                                       , defaultInsertionPoint: ip
+                                       , hiddenRows: [ "folderPicker" ]
+                                       }, window.top);
+    if (performed) {
+      // Select the new item.
+      let insertedNodeId = PlacesUtils.bookmarks
+                                      .getIdForItemAt(ip.itemId, ip.index);
+      this._view.selectItems([insertedNodeId], false);
+    }
+  },
+
+  /**
+   * Create a new Bookmark separator somewhere.
+   */
+  newSeparator: Task.async(function* () {
+    var ip = this._view.insertionPoint;
+    if (!ip)
+      throw Cr.NS_ERROR_NOT_AVAILABLE;
+
+    if (!PlacesUIUtils.useAsyncTransactions) {
+      let txn = new PlacesCreateSeparatorTransaction(ip.itemId, ip.index);
+      PlacesUtils.transactionManager.doTransaction(txn);
+      // Select the new item.
+      let insertedNodeId = PlacesUtils.bookmarks
+                                      .getIdForItemAt(ip.itemId, ip.index);
+      this._view.selectItems([insertedNodeId], false);
+      return;
+    }
+
+    let txn = PlacesTransactions.NewSeparator({ parentGuid: yield ip.promiseGuid()
+                                              , index: ip.index });
+    let guid = yield txn.transact();
+    let itemId = yield PlacesUtils.promiseItemId(guid);
+    // Select the new item.
+    this._view.selectItems([itemId], false);
+  }),
+
+  /**
+   * Opens a dialog for moving the selected nodes.
+   */
+  moveSelectedBookmarks: function PC_moveBookmarks() {
+    window.openDialog("chrome://browser/content/places/moveBookmarks.xul",
+                      "", "chrome, modal",
+                      this._view.selectedNodes);
+  },
+
+  /**
+   * Sort the selected folder by name
+   */
+  sortFolderByName: Task.async(function* () {
+    let itemId = PlacesUtils.getConcreteItemId(this._view.selectedNode);
+    if (!PlacesUIUtils.useAsyncTransactions) {
+      var txn = new PlacesSortFolderByNameTransaction(itemId);
+      PlacesUtils.transactionManager.doTransaction(txn);
+      return;
+    }
+    let guid = yield PlacesUtils.promiseItemGuid(itemId);
+    yield PlacesTransactions.SortByName(guid).transact();
+  }),
+
+  /**
+   * Walk the list of folders we're removing in this delete operation, and
+   * see if the selected node specified is already implicitly being removed
+   * because it is a child of that folder.
+   * @param   node
+   *          Node to check for containment.
+   * @param   pastFolders
+   *          List of folders the calling function has already traversed
+   * @return true if the node should be skipped, false otherwise.
+   */
+  _shouldSkipNode: function PC_shouldSkipNode(node, pastFolders) {
+    /**
+     * Determines if a node is contained by another node within a resultset.
+     * @param   node
+     *          The node to check for containment for
+     * @param   parent
+     *          The parent container to check for containment in
+     * @return true if node is a member of parent's children, false otherwise.
+     */
+    function isNodeContainedBy(parent) {
+      var cursor = node.parent;
+      while (cursor) {
+        if (cursor == parent)
+          return true;
+        cursor = cursor.parent;
+      }
+      return false;
+    }
+
+    for (var j = 0; j < pastFolders.length; ++j) {
+      if (isNodeContainedBy(pastFolders[j]))
+        return true;
+    }
+    return false;
+  },
+
+  /**
+   * Creates a set of transactions for the removal of a range of items.
+   * A range is an array of adjacent nodes in a view.
+   * @param   [in] range
+   *          An array of nodes to remove. Should all be adjacent.
+   * @param   [out] transactions
+   *          An array of transactions.
+   * @param   [optional] removedFolders
+   *          An array of folder nodes that have already been removed.
+   */
+  _removeRange: function PC__removeRange(range, transactions, removedFolders) {
+    NS_ASSERT(transactions instanceof Array, "Must pass a transactions array");
+    if (!removedFolders)
+      removedFolders = [];
+
+    for (var i = 0; i < range.length; ++i) {
+      var node = range[i];
+      if (this._shouldSkipNode(node, removedFolders))
+        continue;
+
+      if (PlacesUtils.nodeIsTagQuery(node.parent)) {
+        // This is a uri node inside a tag container.  It needs a special
+        // untag transaction.
+        var tagItemId = PlacesUtils.getConcreteItemId(node.parent);
+        var uri = NetUtil.newURI(node.uri);
+        if (PlacesUIUtils.useAsyncTransactions) {
+          let tag = node.parent.title;
+          if (!tag)
+            tag = PlacesUtils.bookmarks.getItemTitle(tagItemId);
+          transactions.push(PlacesTransactions.Untag({ uri, tag }));
+        } else {
+          let txn = new PlacesUntagURITransaction(uri, [tagItemId]);
+          transactions.push(txn);
+        }
+      } else if (PlacesUtils.nodeIsTagQuery(node) && node.parent &&
+               PlacesUtils.nodeIsQuery(node.parent) &&
+               PlacesUtils.asQuery(node.parent).queryOptions.resultType ==
+                 Ci.nsINavHistoryQueryOptions.RESULTS_AS_TAG_QUERY) {
+        // This is a tag container.
+        // Untag all URIs tagged with this tag only if the tag container is
+        // child of the "Tags" query in the library, in all other places we
+        // must only remove the query node.
+        let tag = node.title;
+        let URIs = PlacesUtils.tagging.getURIsForTag(tag);
+        if (PlacesUIUtils.useAsyncTransactions) {
+          transactions.push(PlacesTransactions.Untag({ tag, uris: URIs }));
+        } else {
+          for (var j = 0; j < URIs.length; j++) {
+            let txn = new PlacesUntagURITransaction(URIs[j], [tag]);
+            transactions.push(txn);
+          }
+        }
+      } else if (PlacesUtils.nodeIsURI(node) &&
+               PlacesUtils.nodeIsQuery(node.parent) &&
+               PlacesUtils.asQuery(node.parent).queryOptions.queryType ==
+                 Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY) {
+        // This is a uri node inside an history query.
+        PlacesUtils.bhistory.removePage(NetUtil.newURI(node.uri));
+        // History deletes are not undoable, so we don't have a transaction.
+      } else if (node.itemId == -1 &&
+               PlacesUtils.nodeIsQuery(node) &&
+               PlacesUtils.asQuery(node).queryOptions.queryType ==
+                 Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY) {
+        // This is a dynamically generated history query, like queries
+        // grouped by site, time or both.  Dynamically generated queries don't
+        // have an itemId even if they are descendants of a bookmark.
+        this._removeHistoryContainer(node);
+        // History deletes are not undoable, so we don't have a transaction.
+      } else {
+        // This is a common bookmark item.
+        if (PlacesUtils.nodeIsFolder(node)) {
+          // If this is a folder we add it to our array of folders, used
+          // to skip nodes that are children of an already removed folder.
+          removedFolders.push(node);
+        }
+        if (PlacesUIUtils.useAsyncTransactions) {
+          transactions.push(
+            PlacesTransactions.Remove({ guid: node.bookmarkGuid }));
+        } else {
+          let txn = new PlacesRemoveItemTransaction(node.itemId);
+          transactions.push(txn);
+        }
+      }
+    }
+  },
+
+  /**
+   * Removes the set of selected ranges from bookmarks.
+   * @param   txnName
+   *          See |remove|.
+   */
+  _removeRowsFromBookmarks: Task.async(function* (txnName) {
+    var ranges = this._view.removableSelectionRanges;
+    var transactions = [];
+    var removedFolders = [];
+
+    for (var i = 0; i < ranges.length; i++)
+      this._removeRange(ranges[i], transactions, removedFolders);
+
+    if (transactions.length > 0) {
+      if (PlacesUIUtils.useAsyncTransactions) {
+        yield PlacesTransactions.batch(transactions);
+      } else {
+        var txn = new PlacesAggregatedTransaction(txnName, transactions);
+        PlacesUtils.transactionManager.doTransaction(txn);
+      }
+    }
+  }),
+
+  /**
+   * Removes the set of selected ranges from history.
+   *
+   * @note history deletes are not undoable.
+   */
+  _removeRowsFromHistory: function PC__removeRowsFromHistory() {
+    let nodes = this._view.selectedNodes;
+    let URIs = [];
+    for (let i = 0; i < nodes.length; ++i) {
+      let node = nodes[i];
+      if (PlacesUtils.nodeIsURI(node)) {
+        let uri = NetUtil.newURI(node.uri);
+        // Avoid duplicates.
+        if (URIs.indexOf(uri) < 0) {
+          URIs.push(uri);
+        }
+      } else if (PlacesUtils.nodeIsQuery(node) &&
+               PlacesUtils.asQuery(node).queryOptions.queryType ==
+                 Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY) {
+        this._removeHistoryContainer(node);
+      }
+    }
+
+    // Do removal in chunks to give some breath to main-thread.
+    function* pagesChunkGenerator(aURIs) {
+      while (aURIs.length) {
+        let URIslice = aURIs.splice(0, REMOVE_PAGES_CHUNKLEN);
+        PlacesUtils.bhistory.removePages(URIslice, URIslice.length);
+        Services.tm.mainThread.dispatch(() => gen.next(),
+                                        Ci.nsIThread.DISPATCH_NORMAL);
+        yield undefined;
+      }
+    }
+    let gen = pagesChunkGenerator(URIs);
+    gen.next();
+  },
+
+  /**
+   * Removes history visits for an history container node.
+   * @param   [in] aContainerNode
+   *          The container node to remove.
+   *
+   * @note history deletes are not undoable.
+   */
+  _removeHistoryContainer: function PC__removeHistoryContainer(aContainerNode) {
+    if (PlacesUtils.nodeIsHost(aContainerNode)) {
+      // Site container.
+      PlacesUtils.bhistory.removePagesFromHost(aContainerNode.title, true);
+    } else if (PlacesUtils.nodeIsDay(aContainerNode)) {
+      // Day container.
+      let query = aContainerNode.getQueries()[0];
+      let beginTime = query.beginTime;
+      let endTime = query.endTime;
+      NS_ASSERT(query && beginTime && endTime,
+                "A valid date container query should exist!");
+      // We want to exclude beginTime from the removal because
+      // removePagesByTimeframe includes both extremes, while date containers
+      // exclude the lower extreme.  So, if we would not exclude it, we would
+      // end up removing more history than requested.
+      PlacesUtils.bhistory.removePagesByTimeframe(beginTime + 1, endTime);
+    }
+  },
+
+  /**
+   * Removes the selection
+   * @param   aTxnName
+   *          A name for the transaction if this is being performed
+   *          as part of another operation.
+   */
+  remove: Task.async(function* (aTxnName) {
+    if (!this._hasRemovableSelection())
+      return;
+
+    NS_ASSERT(aTxnName !== undefined, "Must supply Transaction Name");
+
+    var root = this._view.result.root;
+
+    if (PlacesUtils.nodeIsFolder(root)) {
+      if (PlacesUIUtils.useAsyncTransactions)
+        yield this._removeRowsFromBookmarks(aTxnName);
+      else
+        this._removeRowsFromBookmarks(aTxnName);
+    } else if (PlacesUtils.nodeIsQuery(root)) {
+      var queryType = PlacesUtils.asQuery(root).queryOptions.queryType;
+      if (queryType == Ci.nsINavHistoryQueryOptions.QUERY_TYPE_BOOKMARKS) {
+        if (PlacesUIUtils.useAsyncTransactions)
+          yield this._removeRowsFromBookmarks(aTxnName);
+        else
+          this._removeRowsFromBookmarks(aTxnName);
+      } else if (queryType == Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY) {
+        this._removeRowsFromHistory();
+      } else {
+        NS_ASSERT(false, "implement support for QUERY_TYPE_UNIFIED");
+      }
+    } else
+      NS_ASSERT(false, "unexpected root");
+  }),
+
+  /**
+   * Fills a DataTransfer object with the content of the selection that can be
+   * dropped elsewhere.
+   * @param   aEvent
+   *          The dragstart event.
+   */
+  setDataTransfer: function PC_setDataTransfer(aEvent) {
+    let dt = aEvent.dataTransfer;
+
+    let result = this._view.result;
+    let didSuppressNotifications = result.suppressNotifications;
+    if (!didSuppressNotifications)
+      result.suppressNotifications = true;
+
+    function addData(type, index, feedURI) {
+      let wrapNode = PlacesUtils.wrapNode(node, type, feedURI);
+      dt.mozSetDataAt(type, wrapNode, index);
+    }
+
+    function addURIData(index, feedURI) {
+      addData(PlacesUtils.TYPE_X_MOZ_URL, index, feedURI);
+      addData(PlacesUtils.TYPE_UNICODE, index, feedURI);
+      addData(PlacesUtils.TYPE_HTML, index, feedURI);
+    }
+
+    try {
+      let nodes = this._view.draggableSelection;
+      for (let i = 0; i < nodes.length; ++i) {
+        var node = nodes[i];
+
+        // This order is _important_! It controls how this and other
+        // applications select data to be inserted based on type.
+        addData(PlacesUtils.TYPE_X_MOZ_PLACE, i);
+
+        // Drop the feed uri for livemark containers
+        let livemarkInfo = this.getCachedLivemarkInfo(node);
+        if (livemarkInfo) {
+          addURIData(i, livemarkInfo.feedURI.spec);
+        } else if (node.uri) {
+          addURIData(i);
+        }
+      }
+    } finally {
+      if (!didSuppressNotifications)
+        result.suppressNotifications = false;
+    }
+  },
+
+  get clipboardAction() {
+    let action = {};
+    let actionOwner;
+    try {
+      let xferable = Cc["@mozilla.org/widget/transferable;1"].
+                     createInstance(Ci.nsITransferable);
+      xferable.init(null);
+      xferable.addDataFlavor(PlacesUtils.TYPE_X_MOZ_PLACE_ACTION)
+      this.clipboard.getData(xferable, Ci.nsIClipboard.kGlobalClipboard);
+      xferable.getTransferData(PlacesUtils.TYPE_X_MOZ_PLACE_ACTION, action, {});
+      [action, actionOwner] =
+        action.value.QueryInterface(Ci.nsISupportsString).data.split(",");
+    } catch (ex) {
+      // Paste from external sources don't have any associated action, just
+      // fallback to a copy action.
+      return "copy";
+    }
+    // For cuts also check who inited the action, since cuts across different
+    // instances should instead be handled as copies (The sources are not
+    // available for this instance).
+    if (action == "cut" && actionOwner != this.profileName)
+      action = "copy";
+
+    return action;
+  },
+
+  _releaseClipboardOwnership: function PC__releaseClipboardOwnership() {
+    if (this.cutNodes.length > 0) {
+      // This clears the logical clipboard, doesn't remove data.
+      this.clipboard.emptyClipboard(Ci.nsIClipboard.kGlobalClipboard);
+    }
+  },
+
+  _clearClipboard: function PC__clearClipboard() {
+    let xferable = Cc["@mozilla.org/widget/transferable;1"].
+                   createInstance(Ci.nsITransferable);
+    xferable.init(null);
+    // Empty transferables may cause crashes, so just add an unknown type.
+    const TYPE = "text/x-moz-place-empty";
+    xferable.addDataFlavor(TYPE);
+    xferable.setTransferData(TYPE, PlacesUtils.toISupportsString(""), 0);
+    this.clipboard.setData(xferable, null, Ci.nsIClipboard.kGlobalClipboard);
+  },
+
+  _populateClipboard: function PC__populateClipboard(aNodes, aAction) {
+    // This order is _important_! It controls how this and other applications
+    // select data to be inserted based on type.
+    let contents = [
+      { type: PlacesUtils.TYPE_X_MOZ_PLACE, entries: [] },
+      { type: PlacesUtils.TYPE_X_MOZ_URL, entries: [] },
+      { type: PlacesUtils.TYPE_HTML, entries: [] },
+      { type: PlacesUtils.TYPE_UNICODE, entries: [] },
+    ];
+
+    // Avoid handling descendants of a copied node, the transactions take care
+    // of them automatically.
+    let copiedFolders = [];
+    aNodes.forEach(function(node) {
+      if (this._shouldSkipNode(node, copiedFolders))
+        return;
+      if (PlacesUtils.nodeIsFolder(node))
+        copiedFolders.push(node);
+
+      let livemarkInfo = this.getCachedLivemarkInfo(node);
+      let feedURI = livemarkInfo && livemarkInfo.feedURI.spec;
+
+      contents.forEach(function(content) {
+        content.entries.push(
+          PlacesUtils.wrapNode(node, content.type, feedURI)
+        );
+      });
+    }, this);
+
+    function addData(type, data) {
+      xferable.addDataFlavor(type);
+      xferable.setTransferData(type, PlacesUtils.toISupportsString(data),
+                               data.length * 2);
+    }
+
+    let xferable = Cc["@mozilla.org/widget/transferable;1"].
+                   createInstance(Ci.nsITransferable);
+    xferable.init(null);
+    let hasData = false;
+    // This order matters here!  It controls how this and other applications
+    // select data to be inserted based on type.
+    contents.forEach(function(content) {
+      if (content.entries.length > 0) {
+        hasData = true;
+        let glue =
+          content.type == PlacesUtils.TYPE_X_MOZ_PLACE ? "," : PlacesUtils.endl;
+        addData(content.type, content.entries.join(glue));
+      }
+    });
+
+    // Track the exected action in the xferable.  This must be the last flavor
+    // since it's the least preferred one.
+    // Enqueue a unique instance identifier to distinguish operations across
+    // concurrent instances of the application.
+    addData(PlacesUtils.TYPE_X_MOZ_PLACE_ACTION, aAction + "," + this.profileName);
+
+    if (hasData) {
+      this.clipboard.setData(xferable,
+                             this.cutNodes.length > 0 ? this : null,
+                             Ci.nsIClipboard.kGlobalClipboard);
+    }
+  },
+
+  _cutNodes: [],
+  get cutNodes() {
+    return this._cutNodes;
+  },
+  set cutNodes(aNodes) {
+    let self = this;
+    function updateCutNodes(aValue) {
+      self._cutNodes.forEach(function(aNode) {
+        self._view.toggleCutNode(aNode, aValue);
+      });
+    }
+
+    updateCutNodes(false);
+    this._cutNodes = aNodes;
+    updateCutNodes(true);
+    return aNodes;
+  },
+
+  /**
+   * Copy Bookmarks and Folders to the clipboard
+   */
+  copy: function PC_copy() {
+    let result = this._view.result;
+    let didSuppressNotifications = result.suppressNotifications;
+    if (!didSuppressNotifications)
+      result.suppressNotifications = true;
+    try {
+      this._populateClipboard(this._view.selectedNodes, "copy");
+    } finally {
+      if (!didSuppressNotifications)
+        result.suppressNotifications = false;
+    }
+  },
+
+  /**
+   * Cut Bookmarks and Folders to the clipboard
+   */
+  cut: function PC_cut() {
+    let result = this._view.result;
+    let didSuppressNotifications = result.suppressNotifications;
+    if (!didSuppressNotifications)
+      result.suppressNotifications = true;
+    try {
+      this._populateClipboard(this._view.selectedNodes, "cut");
+      this.cutNodes = this._view.selectedNodes;
+    } finally {
+      if (!didSuppressNotifications)
+        result.suppressNotifications = false;
+    }
+  },
+
+  /**
+   * Paste Bookmarks and Folders from the clipboard
+   */
+  paste: Task.async(function* () {
+    // No reason to proceed if there isn't a valid insertion point.
+    let ip = this._view.insertionPoint;
+    if (!ip)
+      throw Cr.NS_ERROR_NOT_AVAILABLE;
+
+    let action = this.clipboardAction;
+
+    let xferable = Cc["@mozilla.org/widget/transferable;1"].
+                   createInstance(Ci.nsITransferable);
+    xferable.init(null);
+    // This order matters here!  It controls the preferred flavors for this
+    // paste operation.
+    [ PlacesUtils.TYPE_X_MOZ_PLACE,
+      PlacesUtils.TYPE_X_MOZ_URL,
+      PlacesUtils.TYPE_UNICODE,
+    ].forEach(type => xferable.addDataFlavor(type));
+
+    this.clipboard.getData(xferable, Ci.nsIClipboard.kGlobalClipboard);
+
+    // Now get the clipboard contents, in the best available flavor.
+    let data = {}, type = {}, items = [];
+    try {
+      xferable.getAnyTransferData(type, data, {});
+      data = data.value.QueryInterface(Ci.nsISupportsString).data;
+      type = type.value;
+      items = PlacesUtils.unwrapNodes(data, type);
+    } catch (ex) {
+      // No supported data exists or nodes unwrap failed, just bail out.
+      return;
+    }
+
+    let itemsToSelect = [];
+    if (PlacesUIUtils.useAsyncTransactions) {
+      if (ip.isTag) {
+        let uris = items.filter(item => "uri" in item).map(item => NetUtil.newURI(item.uri));
+        yield PlacesTransactions.Tag({ uris, tag: ip.tagName }).transact();
+      } else {
+        yield PlacesTransactions.batch(function* () {
+          let insertionIndex = ip.index;
+          let parent = yield ip.promiseGuid();
+
+          for (let item of items) {
+            let doCopy = action == "copy";
+
+            // If this is not a copy, check for safety that we can move the
+            // source, otherwise report an error and fallback to a copy.
+            if (!doCopy &&
+                !PlacesControllerDragHelper.canMoveUnwrappedNode(item)) {
+              Components.utils.reportError("Tried to move an unmovable " +
+                             "Places node, reverting to a copy operation.");
+              doCopy = true;
+            }
+            let guid = yield PlacesUIUtils.getTransactionForData(
+              item, type, parent, insertionIndex, doCopy).transact();
+            itemsToSelect.push(yield PlacesUtils.promiseItemId(guid));
+
+            // Adjust index to make sure items are pasted in the correct
+            // position.  If index is DEFAULT_INDEX, items are just appended.
+            if (insertionIndex != PlacesUtils.bookmarks.DEFAULT_INDEX)
+              insertionIndex++;
+          }
+        });
+      }
+    } else {
+      let transactions = [];
+      let insertionIndex = ip.index;
+      for (let i = 0; i < items.length; ++i) {
+        if (ip.isTag) {
+          // Pasting into a tag container means tagging the item, regardless of
+          // the requested action.
+          let tagTxn = new PlacesTagURITransaction(NetUtil.newURI(items[i].uri),
+                                                   [ip.itemId]);
+          transactions.push(tagTxn);
+          continue;
+        }
+
+        // Adjust index to make sure items are pasted in the correct position.
+        // If index is DEFAULT_INDEX, items are just appended.
+        if (ip.index != PlacesUtils.bookmarks.DEFAULT_INDEX)
+          insertionIndex = ip.index + i;
+
+        // If this is not a copy, check for safety that we can move the source,
+        // otherwise report an error and fallback to a copy.
+        if (action != "copy" && !PlacesControllerDragHelper.canMoveUnwrappedNode(items[i])) {
+          Components.utils.reportError("Tried to move an unmovable Places " +
+                                       "node, reverting to a copy operation.");
+          action = "copy";
+        }
+        transactions.push(
+          PlacesUIUtils.makeTransaction(items[i], type, ip.itemId,
+                                        insertionIndex, action == "copy")
+        );
+      }
+
+      let aggregatedTxn = new PlacesAggregatedTransaction("Paste", transactions);
+      PlacesUtils.transactionManager.doTransaction(aggregatedTxn);
+
+      for (let i = 0; i < transactions.length; ++i) {
+        itemsToSelect.push(
+          PlacesUtils.bookmarks.getIdForItemAt(ip.itemId, ip.index + i)
+        );
+      }
+    }
+
+    // Cut/past operations are not repeatable, so clear the clipboard.
+    if (action == "cut") {
+      this._clearClipboard();
+    }
+
+    if (itemsToSelect.length > 0)
+      this._view.selectItems(itemsToSelect, false);
+  }),
+
+  /**
+   * Cache the livemark info for a node.  This allows the controller and the
+   * views to treat the given node as a livemark.
+   * @param aNode
+   *        a places result node.
+   * @param aLivemarkInfo
+   *        a mozILivemarkInfo object.
+   */
+  cacheLivemarkInfo: function PC_cacheLivemarkInfo(aNode, aLivemarkInfo) {
+    this._cachedLivemarkInfoObjects.set(aNode, aLivemarkInfo);
+  },
+
+  /**
+   * Returns whether or not there's cached mozILivemarkInfo object for a node.
+   * @param aNode
+   *        a places result node.
+   * @return true if there's a cached mozILivemarkInfo object for
+   *         aNode, false otherwise.
+   */
+  hasCachedLivemarkInfo: function PC_hasCachedLivemarkInfo(aNode) {
+    return this._cachedLivemarkInfoObjects.has(aNode);
+  },
+
+  /**
+   * Returns the cached livemark info for a node, if set by cacheLivemarkInfo,
+   * null otherwise.
+   * @param aNode
+   *        a places result node.
+   * @return the mozILivemarkInfo object for aNode, if set, null otherwise.
+   */
+  getCachedLivemarkInfo: function PC_getCachedLivemarkInfo(aNode) {
+    return this._cachedLivemarkInfoObjects.get(aNode, null);
+  }
+};
+
+/**
+ * Handles drag and drop operations for views. Note that this is view agnostic!
+ * You should not use PlacesController._view within these methods, since
+ * the view that the item(s) have been dropped on was not necessarily active.
+ * Drop functions are passed the view that is being dropped on.
+ */
+var PlacesControllerDragHelper = {
+  /**
+   * DOM Element currently being dragged over
+   */
+  currentDropTarget: null,
+
+  /**
+   * Determines if the mouse is currently being dragged over a child node of
+   * this menu. This is necessary so that the menu doesn't close while the
+   * mouse is dragging over one of its submenus
+   * @param   node
+   *          The container node
+   * @return true if the user is dragging over a node within the hierarchy of
+   *         the container, false otherwise.
+   */
+  draggingOverChildNode: function PCDH_draggingOverChildNode(node) {
+    let currentNode = this.currentDropTarget;
+    while (currentNode) {
+      if (currentNode == node)
+        return true;
+      currentNode = currentNode.parentNode;
+    }
+    return false;
+  },
+
+  /**
+   * @return The current active drag session. Returns null if there is none.
+   */
+  getSession: function PCDH__getSession() {
+    return this.dragService.getCurrentSession();
+  },
+
+  /**
+   * Extract the first accepted flavor from a list of flavors.
+   * @param aFlavors
+   *        The flavors list of type DOMStringList.
+   */
+  getFirstValidFlavor: function PCDH_getFirstValidFlavor(aFlavors) {
+    for (let i = 0; i < aFlavors.length; i++) {
+      if (PlacesUIUtils.SUPPORTED_FLAVORS.includes(aFlavors[i]))
+        return aFlavors[i];
+    }
+
+    // If no supported flavor is found, check if data includes text/plain
+    // contents.  If so, request them as text/unicode, a conversion will happen
+    // automatically.
+    if (aFlavors.contains("text/plain")) {
+        return PlacesUtils.TYPE_UNICODE;
+    }
+
+    return null;
+  },
+
+  /**
+   * Determines whether or not the data currently being dragged can be dropped
+   * on a places view.
+   * @param ip
+   *        The insertion point where the items should be dropped.
+   */
+  canDrop: function PCDH_canDrop(ip, dt) {
+    let dropCount = dt.mozItemCount;
+
+    // Check every dragged item.
+    for (let i = 0; i < dropCount; i++) {
+      let flavor = this.getFirstValidFlavor(dt.mozTypesAt(i));
+      if (!flavor)
+        return false;
+
+      // Urls can be dropped on any insertionpoint.
+      // XXXmano: remember that this method is called for each dragover event!
+      // Thus we shouldn't use unwrapNodes here at all if possible.
+      // I think it would be OK to accept bogus data here (e.g. text which was
+      // somehow wrapped as TAB_DROP_TYPE, this is not in our control, and
+      // will just case the actual drop to be a no-op), and only rule out valid
+      // expected cases, which are either unsupported flavors, or items which
+      // cannot be dropped in the current insertionpoint. The last case will
+      // likely force us to use unwrapNodes for the private data types of
+      // places.
+      if (flavor == TAB_DROP_TYPE)
+        continue;
+
+      let data = dt.mozGetDataAt(flavor, i);
+      let dragged;
+      try {
+        dragged = PlacesUtils.unwrapNodes(data, flavor)[0];
+      } catch (e) {
+        return false;
+      }
+
+      // Only bookmarks and urls can be dropped into tag containers.
+      if (ip.isTag &&
+          dragged.type != PlacesUtils.TYPE_X_MOZ_URL &&
+          (dragged.type != PlacesUtils.TYPE_X_MOZ_PLACE ||
+           (dragged.uri && dragged.uri.startsWith("place:")) ))
+        return false;
+
+      // The following loop disallows the dropping of a folder on itself or
+      // on any of its descendants.
+      if (dragged.type == PlacesUtils.TYPE_X_MOZ_PLACE_CONTAINER ||
+          (dragged.uri && dragged.uri.startsWith("place:")) ) {
+        let parentId = ip.itemId;
+        while (parentId != PlacesUtils.placesRootId) {
+          if (dragged.concreteId == parentId || dragged.id == parentId)
+            return false;
+          parentId = PlacesUtils.bookmarks.getFolderIdForItem(parentId);
+        }
+      }
+    }
+    return true;
+  },
+
+  /**
+   * Determines if an unwrapped node can be moved.
+   *
+   * @param   aUnwrappedNode
+   *          A node unwrapped by PlacesUtils.unwrapNodes().
+   * @return True if the node can be moved, false otherwise.
+   */
+  canMoveUnwrappedNode(aUnwrappedNode) {
+    return aUnwrappedNode.id > 0 &&
+           !PlacesUtils.isRootItem(aUnwrappedNode.id) &&
+           (!aUnwrappedNode.parent || !PlacesUIUtils.isContentsReadOnly(aUnwrappedNode.parent)) &&
+           aUnwrappedNode.parent != PlacesUtils.tagsFolderId &&
+           aUnwrappedNode.grandParentId != PlacesUtils.tagsFolderId;
+  },
+
+  /**
+   * Determines if a node can be moved.
+   *
+   * @param   aNode
+   *          A nsINavHistoryResultNode node.
+   * @param   [optional] aDOMNode
+   *          A XUL DOM node.
+   * @return True if the node can be moved, false otherwise.
+   */
+  canMoveNode(aNode, aDOMNode) {
+    // Only bookmark items are movable.
+    if (aNode.itemId == -1)
+      return false;
+
+    let parentNode = aNode.parent;
+    if (!parentNode) {
+      // Normally parentless places nodes can not be moved,
+      // but simulated bookmarked URI nodes are special.
+      return !!aDOMNode &&
+             aDOMNode.hasAttribute("simulated-places-node") &&
+             PlacesUtils.nodeIsBookmark(aNode);
+    }
+
+    // Once tags and bookmarked are divorced, the tag-query check should be
+    // removed.
+    return !(PlacesUtils.nodeIsFolder(parentNode) &&
+             PlacesUIUtils.isContentsReadOnly(parentNode)) &&
+           !PlacesUtils.nodeIsTagQuery(parentNode);
+  },
+
+  /**
+   * Handles the drop of one or more items onto a view.
+   * @param   insertionPoint
+   *          The insertion point where the items should be dropped
+   */
+  onDrop: Task.async(function* (insertionPoint, dt) {
+    let doCopy = ["copy", "link"].includes(dt.dropEffect);
+
+    let transactions = [];
+    let dropCount = dt.mozItemCount;
+    let movedCount = 0;
+    let parentGuid = PlacesUIUtils.useAsyncTransactions ?
+                       (yield insertionPoint.promiseGuid()) : null;
+    let tagName = insertionPoint.tagName;
+    for (let i = 0; i < dropCount; ++i) {
+      let flavor = this.getFirstValidFlavor(dt.mozTypesAt(i));
+      if (!flavor)
+        return;
+
+      let data = dt.mozGetDataAt(flavor, i);
+      let unwrapped;
+      if (flavor != TAB_DROP_TYPE) {
+        // There's only ever one in the D&D case.
+        unwrapped = PlacesUtils.unwrapNodes(data, flavor)[0];
+      } else if (data instanceof XULElement && data.localName == "tab" &&
+               data.ownerGlobal instanceof ChromeWindow) {
+        let uri = data.linkedBrowser.currentURI;
+        let spec = uri ? uri.spec : "about:blank";
+        unwrapped = { uri: spec,
+                      title: data.label,
+                      type: PlacesUtils.TYPE_X_MOZ_URL};
+      } else
+        throw new Error("bogus data was passed as a tab");
+
+      let index = insertionPoint.index;
+
+      // Adjust insertion index to prevent reversal of dragged items. When you
+      // drag multiple elts upward: need to increment index or each successive
+      // elt will be inserted at the same index, each above the previous.
+      let dragginUp = insertionPoint.itemId == unwrapped.parent &&
+                      index < PlacesUtils.bookmarks.getItemIndex(unwrapped.id);
+      if (index != -1 && dragginUp)
+        index += movedCount++;
+
+      // If dragging over a tag container we should tag the item.
+      if (insertionPoint.isTag) {
+        let uri = NetUtil.newURI(unwrapped.uri);
+        let tagItemId = insertionPoint.itemId;
+        if (PlacesUIUtils.useAsyncTransactions)
+          transactions.push(PlacesTransactions.Tag({ uri, tag: tagName }));
+        else
+          transactions.push(new PlacesTagURITransaction(uri, [tagItemId]));
+      } else {
+        // If this is not a copy, check for safety that we can move the source,
+        // otherwise report an error and fallback to a copy.
+        if (!doCopy && !PlacesControllerDragHelper.canMoveUnwrappedNode(unwrapped)) {
+          Components.utils.reportError("Tried to move an unmovable Places " +
+                                       "node, reverting to a copy operation.");
+          doCopy = true;
+        }
+        if (PlacesUIUtils.useAsyncTransactions) {
+          transactions.push(
+            PlacesUIUtils.getTransactionForData(unwrapped,
+                                                flavor,
+                                                parentGuid,
+                                                index,
+                                                doCopy));
+        } else {
+          transactions.push(PlacesUIUtils.makeTransaction(unwrapped,
+                              flavor, insertionPoint.itemId,
+                              index, doCopy));
+        }
+      }
+    }
+
+    if (PlacesUIUtils.useAsyncTransactions) {
+      yield PlacesTransactions.batch(transactions);
+    } else {
+      let txn = new PlacesAggregatedTransaction("DropItems", transactions);
+      PlacesUtils.transactionManager.doTransaction(txn);
+    }
+  }),
+
+  /**
+   * Checks if we can insert into a container.
+   * @param   aContainer
+   *          The container were we are want to drop
+   */
+  disallowInsertion(aContainer) {
+    NS_ASSERT(aContainer, "empty container");
+    // Allow dropping into Tag containers and editable folders.
+    return !PlacesUtils.nodeIsTagQuery(aContainer) &&
+           (!PlacesUtils.nodeIsFolder(aContainer) ||
+            PlacesUIUtils.isContentsReadOnly(aContainer));
+  }
+};
+
+
+XPCOMUtils.defineLazyServiceGetter(PlacesControllerDragHelper, "dragService",
+                                   "@mozilla.org/widget/dragservice;1",
+                                   "nsIDragService");
+
+function goUpdatePlacesCommands() {
+  // Get the controller for one of the places commands.
+  var placesController = doGetPlacesControllerForCommand("placesCmd_open");
+  function updatePlacesCommand(aCommand) {
+    goSetCommandEnabled(aCommand, placesController &&
+                                  placesController.isCommandEnabled(aCommand));
+  }
+
+  updatePlacesCommand("placesCmd_open");
+  updatePlacesCommand("placesCmd_open:window");
+  updatePlacesCommand("placesCmd_open:privatewindow");
+  updatePlacesCommand("placesCmd_open:tab");
+  updatePlacesCommand("placesCmd_new:folder");
+  updatePlacesCommand("placesCmd_new:bookmark");
+  updatePlacesCommand("placesCmd_new:separator");
+  updatePlacesCommand("placesCmd_show:info");
+  updatePlacesCommand("placesCmd_moveBookmarks");
+  updatePlacesCommand("placesCmd_reload");
+  updatePlacesCommand("placesCmd_sortBy:name");
+  updatePlacesCommand("placesCmd_cut");
+  updatePlacesCommand("placesCmd_copy");
+  updatePlacesCommand("placesCmd_paste");
+  updatePlacesCommand("placesCmd_delete");
+}
+
+function doGetPlacesControllerForCommand(aCommand) {
+  // A context menu may be built for non-focusable views.  Thus, we first try
+  // to look for a view associated with document.popupNode
+  let popupNode;
+  try {
+    popupNode = document.popupNode;
+  } catch (e) {
+    // The document went away (bug 797307).
+    return null;
+  }
+  if (popupNode) {
+    let view = PlacesUIUtils.getViewForNode(popupNode);
+    if (view && view._contextMenuShown)
+      return view.controllers.getControllerForCommand(aCommand);
+  }
+
+  // When we're not building a context menu, only focusable views
+  // are possible.  Thus, we can safely use the command dispatcher.
+  let controller = top.document.commandDispatcher
+                      .getControllerForCommand(aCommand);
+  if (controller)
+    return controller;
+
+  return null;
+}
+
+function goDoPlacesCommand(aCommand) {
+  let controller = doGetPlacesControllerForCommand(aCommand);
+  if (controller && controller.isCommandEnabled(aCommand))
+    controller.doCommand(aCommand);
+}