Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1711 insertions, 0 deletions

diff --git a/browser/components/places/content/controller.js b/browser/components/places/content/controller.js
new file mode 100644
index 0000000000..0eb9322f71
--- /dev/null
+++ b/browser/components/places/content/controller.js
@@ -0,0 +1,1711 @@
+/* -*- 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/. */
+
+ChromeUtils.defineESModuleGetters(this, {
+  PlacesTransactions: "resource://gre/modules/PlacesTransactions.sys.mjs",
+  PlacesUIUtils: "resource:///modules/PlacesUIUtils.sys.mjs",
+  PlacesUtils: "resource://gre/modules/PlacesUtils.sys.mjs",
+});
+
+/* import-globals-from /browser/base/content/utilityOverlay.js */
+/* import-globals-from ./places.js */
+
+/**
+ * Represents an insertion point within a container where we can insert
+ * items.
+ *
+ * @param {object} options an object containing the following properties:
+ * @param {string} options.parentGuid
+ *     The unique identifier of the parent container
+ * @param {number} [options.index]
+ *     The index within the container where to insert, defaults to appending
+ * @param {number} [options.orientation]
+ *     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! Defaults to DROP_ON.
+ * @param {string} [options.tagName]
+ *     The tag name if this IP is set to a tag, null otherwise.
+ * @param {*} [options.dropNearNode]
+ *     When defined index will be calculated based on this node
+ */
+function PlacesInsertionPoint({
+  parentGuid,
+  index = PlacesUtils.bookmarks.DEFAULT_INDEX,
+  orientation = Ci.nsITreeView.DROP_ON,
+  tagName = null,
+  dropNearNode = null,
+}) {
+  this.guid = parentGuid;
+  this._index = index;
+  this.orientation = orientation;
+  this.tagName = tagName;
+  this.dropNearNode = dropNearNode;
+}
+
+PlacesInsertionPoint.prototype = {
+  set index(val) {
+    this._index = val;
+  },
+
+  async getIndex() {
+    if (this.dropNearNode) {
+      // If dropNearNode is set up we must calculate the index of the item near
+      // which we will drop.
+      let index = (
+        await PlacesUtils.bookmarks.fetch(this.dropNearNode.bookmarkGuid)
+      ).index;
+      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.defineLazyGetter(this, "profileName", function () {
+    return Services.dirsvc.get("ProfD", Ci.nsIFile).leafName;
+  });
+
+  XPCOMUtils.defineLazyPreferenceGetter(
+    this,
+    "forgetSiteClearByBaseDomain",
+    "places.forgetThisSite.clearByBaseDomain",
+    false
+  );
+  ChromeUtils.defineESModuleGetters(this, {
+    ForgetAboutSite: "resource://gre/modules/ForgetAboutSite.sys.mjs",
+  });
+}
+
+PlacesController.prototype = {
+  /**
+   * The places view.
+   */
+  _view: null,
+
+  // This is used in certain views to disable user actions on the places tree
+  // views. This avoids accidental deletion/modification when the user is not
+  // actually organising the trees.
+  disableUserActions: false,
+
+  QueryInterface: ChromeUtils.generateQI(["nsIClipboardOwner"]),
+
+  // nsIClipboardOwner
+  LosingOwnership: function PC_LosingOwnership(aXferable) {
+    this.cutNodes = [];
+  },
+
+  terminate: function PC_terminate() {
+    this._releaseClipboardOwnership();
+  },
+
+  supportsCommand: function PC_supportsCommand(aCommand) {
+    if (this.disableUserActions) {
+      return false;
+    }
+    // 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) {
+    // Determine whether or not nodes can be inserted.
+    let ip = this._view.insertionPoint;
+    let canInsert = ip && (aCommand.endsWith("_paste") || !ip.isTag);
+
+    switch (aCommand) {
+      case "cmd_undo":
+        return PlacesTransactions.topUndoEntry != null;
+      case "cmd_redo":
+        return PlacesTransactions.topRedoEntry != null;
+      case "cmd_cut":
+      case "placesCmd_cut":
+        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":
+      case "placesCmd_showInFolder":
+        return this._view.hasSelection;
+      case "cmd_paste":
+      case "placesCmd_paste":
+        // If the clipboard contains a Places flavor it is definitely pasteable,
+        // otherwise we also allow pasting "text/plain" and "text/x-moz-url" data.
+        // We don't check if the data is valid here, because the clipboard may
+        // contain very large blobs that would largely slowdown commands updating.
+        // Of course later paste() should ignore any invalid data.
+        return (
+          canInsert &&
+          Services.clipboard.hasDataMatchingFlavors(
+            [
+              ...PlacesUIUtils.PLACES_FLAVORS,
+              PlacesUtils.TYPE_X_MOZ_URL,
+              PlacesUtils.TYPE_PLAINTEXT,
+            ],
+            Ci.nsIClipboard.kGlobalClipboard
+          )
+        );
+      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 canInsert;
+      case "placesCmd_new:bookmark":
+        return canInsert;
+      case "placesCmd_new:separator":
+        return (
+          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.isRootItem(
+            PlacesUtils.getConcreteItemGuid(selectedNode)
+          ) &&
+          (PlacesUtils.nodeIsTagQuery(selectedNode) ||
+            PlacesUtils.nodeIsBookmark(selectedNode) ||
+            (PlacesUtils.nodeIsFolder(selectedNode) &&
+              !PlacesUtils.isQueryGeneratedFolder(selectedNode)))
+        );
+      }
+      case "placesCmd_sortBy:name": {
+        let selectedNode = this._view.selectedNode;
+        return (
+          selectedNode &&
+          PlacesUtils.nodeIsFolder(selectedNode) &&
+          !PlacesUIUtils.isFolderReadOnly(selectedNode) &&
+          this._view.result.sortingMode ==
+            Ci.nsINavHistoryQueryOptions.SORT_BY_NONE
+        );
+      }
+      case "placesCmd_createBookmark": {
+        return !this._view.selectedNodes.some(
+          node => !PlacesUtils.nodeIsURI(node) || node.itemId != -1
+        );
+      }
+      default:
+        return false;
+    }
+  },
+
+  doCommand: function PC_doCommand(aCommand) {
+    switch (aCommand) {
+      case "cmd_undo":
+        PlacesTransactions.undo().catch(console.error);
+        break;
+      case "cmd_redo":
+        PlacesTransactions.redo().catch(console.error);
+        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().catch(console.error);
+        break;
+      case "cmd_delete":
+      case "placesCmd_delete":
+        this.remove("Remove Selection").catch(console.error);
+        break;
+      case "placesCmd_deleteDataHost":
+        this.forgetAboutThisSite().catch(console.error);
+        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").catch(console.error);
+        break;
+      case "placesCmd_new:bookmark":
+        this.newItem("bookmark").catch(console.error);
+        break;
+      case "placesCmd_new:separator":
+        this.newSeparator().catch(console.error);
+        break;
+      case "placesCmd_show:info":
+        this.showBookmarkPropertiesForSelection();
+        break;
+      case "placesCmd_sortBy:name":
+        this.sortFolderByName().catch(console.error);
+        break;
+      case "placesCmd_createBookmark": {
+        const nodes = this._view.selectedNodes.map(node => {
+          return {
+            uri: Services.io.newURI(node.uri),
+            title: node.title,
+          };
+        });
+        PlacesUIUtils.showBookmarkPagesDialog(
+          nodes,
+          ["keyword", "location"],
+          window.top
+        );
+        break;
+      }
+      case "placesCmd_showInFolder":
+        this.showInFolder(this._view.selectedNode.bookmarkGuid);
+        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.
+   *
+   * @returns {boolean} 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;
+  },
+
+  /**
+   * Gathers information about the selected nodes according to the following
+   * rules:
+   *    "link"              node is a URI
+   *    "bookmark"          node is a bookmark
+   *    "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
+   *
+   * @returns {Array} 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() {
+    return this._view.selectedNodes.map(n => this._selectionMetadataForNode(n));
+  },
+
+  _selectionMetadataForNode(node) {
+    let nodeData = {};
+    // We don't use the nodeIs* methods here to avoid going through the type
+    // property way too often
+    switch (node.type) {
+      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.query_host = true;
+              break;
+            case Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_SITE_QUERY:
+            case Ci.nsINavHistoryQueryOptions.RESULTS_AS_DATE_QUERY:
+              nodeData.query_day = true;
+              break;
+            case Ci.nsINavHistoryQueryOptions.RESULTS_AS_TAGS_ROOT:
+              nodeData.query_tag = true;
+          }
+        }
+        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;
+        if (PlacesUtils.nodeIsBookmark(node)) {
+          nodeData.link_bookmark = true;
+          var parentNode = node.parent;
+          if (parentNode && PlacesUtils.nodeIsTagQuery(parentNode)) {
+            nodeData.link_bookmark_tag = true;
+          }
+        }
+        break;
+    }
+    return nodeData;
+  },
+
+  /**
+   * Determines if a context-menu item should be shown
+   *
+   * @param {object} aMenuItem
+   *        the context menu item
+   * @param {object} aMetaData
+   *        meta data about the selection
+   * @returns {boolean} true if the conditions (see buildContextMenu) are satisfied
+   *          and the item can be displayed, false otherwise.
+   */
+  _shouldShowMenuItem(aMenuItem, aMetaData) {
+    if (
+      aMenuItem.hasAttribute("hide-if-private-browsing") &&
+      !PrivateBrowsingUtils.enabled
+    ) {
+      return false;
+    }
+
+    if (
+      aMenuItem.hasAttribute("hide-if-usercontext-disabled") &&
+      !Services.prefs.getBoolPref("privacy.userContext.enabled", false)
+    ) {
+      return false;
+    }
+
+    let selectiontype =
+      aMenuItem.getAttribute("selection-type") || "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;
+    }
+    // If there is no selection and selectionType doesn't include `none`
+    // hide the item, otherwise try to use the root node to extract valid
+    // metadata to compare against.
+    if (count == 0) {
+      if (!selectionTypes.includes("none")) {
+        return false;
+      }
+      aMetaData = [this._selectionMetadataForNode(this._view.result.root)];
+    }
+
+    let attr = aMenuItem.getAttribute("hide-if-node-type");
+    if (attr) {
+      let rules = attr.split("|");
+      if (aMetaData.some(d => rules.some(r => r in d))) {
+        return false;
+      }
+    }
+
+    attr = aMenuItem.getAttribute("hide-if-node-type-is-only");
+    if (attr) {
+      let rules = attr.split("|");
+      if (rules.some(r => aMetaData.every(d => r in d))) {
+        return false;
+      }
+    }
+
+    attr = aMenuItem.getAttribute("node-type");
+    if (!attr) {
+      return true;
+    }
+
+    let anyMatched = false;
+    let rules = attr.split("|");
+    for (let metaData of aMetaData) {
+      if (rules.some(r => r in metaData)) {
+        anyMatched = true;
+      } else {
+        return false;
+      }
+    }
+    return anyMatched;
+  },
+
+  /**
+   * Uses meta-data rules set as attributes on the menuitems, representing the
+   * current selection in the view (see `_buildSelectionMetadata`) and sets the
+   * visibility state for each menuitem according to the following rules:
+   *  1) The visibility state is unchanged if none of the attributes are set.
+   *  2) Attributes should not be set on menuseparators.
+   *  3) The boolean `ignore-item` attribute may be set when this code should
+   *     not handle that menuitem.
+   *  4) The `selection-type` attribute may be set to:
+   *      - `single` if it should be visible only when there is a single node
+   *         selected
+   *      - `multiple` if it should be visible only when multiple nodes are
+   *         selected
+   *      - `none` if it should be visible when there are no selected nodes
+   *      - `any` if it should be visible for any kind of selection
+   *      - a `|` separated combination of the above.
+   *  5) The `node-type` attribute may be set to values representing the
+   *     type of the node triggering the context menu. The menuitem will be
+   *     visible when one of the rules (separated by `|`) matches.
+   *     In case of multiple selection, the menuitem is visible only if all of
+   *     the selected nodes match one of the rule.
+   *  6) The `hide-if-node-type` accepts the same rules as `node-type`, but
+   *     hides the menuitem if the nodes match at least one of the rules.
+   *     It takes priority over `nodetype`.
+   *  7) The `hide-if-node-type-is-only` accepts the same rules as `node-type`, but
+   *     hides the menuitem if any of the rules match all of the nodes.
+   *  8) The boolean `hide-if-no-insertion-point` attribute may be set to hide a
+   *     menuitem when there's no insertion point. An insertion point represents
+   *     a point in the view where a new item can be inserted.
+   *  9) The boolean `hide-if-private-browsing` attribute may be set to hide a
+   *     menuitem in private browsing mode
+   * 10) The boolean `hide-if-single-click-opens` attribute may be set to hide a
+   *     menuitem in views opening entries with a single click.
+   *
+   * @param {object} aPopup
+   *        The menupopup to build children into.
+   * @returns {boolean} true if at least one item is visible, false otherwise.
+   */
+  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.children.length; ++i) {
+      var item = aPopup.children[i];
+      if (item.getAttribute("ignore-item") == "true") {
+        continue;
+      }
+      if (item.localName != "menuseparator") {
+        // We allow pasting into tag containers, so special case that.
+        let hideIfNoIP =
+          item.getAttribute("hide-if-no-insertion-point") == "true" &&
+          noIp &&
+          !(ip && ip.isTag && item.id == "placesContext_paste");
+        let hideIfPrivate =
+          item.getAttribute("hide-if-private-browsing") == "true" &&
+          PrivateBrowsingUtils.isWindowPrivate(window);
+        // Hide `Open` if the primary action on click is opening.
+        let hideIfSingleClickOpens =
+          item.getAttribute("hide-if-single-click-opens") == "true" &&
+          !PlacesUIUtils.loadBookmarksInBackground &&
+          !PlacesUIUtils.loadBookmarksInTabs &&
+          this._view.singleClickOpens;
+        let hideIfNotSearch =
+          item.getAttribute("hide-if-not-search") == "true" &&
+          (!this._view.selectedNode ||
+            !this._view.selectedNode.parent ||
+            !PlacesUtils.nodeIsQuery(this._view.selectedNode.parent));
+
+        let shouldHideItem =
+          hideIfNoIP ||
+          hideIfPrivate ||
+          hideIfSingleClickOpens ||
+          hideIfNotSearch ||
+          !this._shouldShowMenuItem(item, metadata);
+        item.hidden = shouldHideItem;
+        item.disabled =
+          shouldHideItem || item.getAttribute("start-disabled") == "true";
+
+        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;
+      }
+
+      if (item.id === "placesContext_deleteBookmark") {
+        document.l10n.setAttributes(item, "places-delete-bookmark", {
+          count: metadata.length,
+        });
+      }
+      if (item.id === "placesContext_deleteFolder") {
+        document.l10n.setAttributes(item, "places-delete-folder", {
+          count: metadata.length,
+        });
+      }
+    }
+
+    // Set Open Folder/Links In Tabs or Open Bookmark item's enabled state if they're visible
+    if (usableItemCount > 0) {
+      let openContainerInTabsItem = document.getElementById(
+        "placesContext_openContainer:tabs"
+      );
+      let openBookmarksItem = document.getElementById(
+        "placesContext_openBookmarkContainer:tabs"
+      );
+      for (let menuItem of [openContainerInTabsItem, openBookmarksItem]) {
+        if (!menuItem.hidden) {
+          var containerToUse =
+            this._view.selectedNode || this._view.result.root;
+          if (PlacesUtils.nodeIsContainer(containerToUse)) {
+            if (!PlacesUtils.hasChildURIs(containerToUse)) {
+              menuItem.disabled = true;
+              // Ensure that we don't display the menu if nothing is enabled:
+              usableItemCount--;
+            }
+          }
+        }
+      }
+    }
+
+    const deleteHistoryItem = document.getElementById(
+      "placesContext_delete_history"
+    );
+    document.l10n.setAttributes(deleteHistoryItem, "places-delete-page", {
+      count: metadata.length,
+    });
+
+    const createBookmarkItem = document.getElementById(
+      "placesContext_createBookmark"
+    );
+    document.l10n.setAttributes(createBookmarkItem, "places-create-bookmark", {
+      count: metadata.length,
+    });
+
+    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
+    );
+  },
+
+  /**
+   * Opens the links in the selected folder, or the selected links in new tabs.
+   *
+   * @param {object} aEvent
+   *   The associated event.
+   */
+  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;
+    }
+    PlacesUIUtils.openMultipleLinksInTabs(
+      node ? node : nodes,
+      aEvent,
+      this._view
+    );
+  },
+
+  /**
+   * Shows the Add Bookmark UI for the current insertion point.
+   *
+   * @param {string} aType
+   *        the type of the new item (bookmark/folder)
+   */
+  async newItem(aType) {
+    let ip = this._view.insertionPoint;
+    if (!ip) {
+      throw Components.Exception("", Cr.NS_ERROR_NOT_AVAILABLE);
+    }
+
+    let bookmarkGuid = await PlacesUIUtils.showBookmarkDialog(
+      {
+        action: "add",
+        type: aType,
+        defaultInsertionPoint: ip,
+        hiddenRows: ["folderPicker"],
+      },
+      window.top
+    );
+    if (bookmarkGuid) {
+      this._view.selectItems([bookmarkGuid], false);
+    }
+  },
+
+  /**
+   * Create a new Bookmark separator somewhere.
+   */
+  async newSeparator() {
+    var ip = this._view.insertionPoint;
+    if (!ip) {
+      throw Components.Exception("", Cr.NS_ERROR_NOT_AVAILABLE);
+    }
+
+    let index = await ip.getIndex();
+    let txn = PlacesTransactions.NewSeparator({ parentGuid: ip.guid, index });
+    let guid = await txn.transact();
+    // Select the new item.
+    this._view.selectItems([guid], false);
+  },
+
+  /**
+   * Sort the selected folder by name
+   */
+  async sortFolderByName() {
+    let guid = PlacesUtils.getConcreteItemGuid(this._view.selectedNode);
+    await 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 {object} node
+   *        Node to check for containment.
+   * @param {Array} pastFolders
+   *        List of folders the calling function has already traversed
+   * @returns {boolean} 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 {object} parent
+     *        The parent container to check for containment in
+     * @returns {boolean} 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 {Array} range
+   *          An array of nodes to remove. Should all be adjacent.
+   * @param {Array} transactions
+   *          An array of transactions (returned)
+   * @param  {Array} [removedFolders]
+   *          An array of folder nodes that have already been removed.
+   * @returns {number} The total number of items affected.
+   */
+  async _removeRange(range, transactions, removedFolders) {
+    if (!(transactions instanceof Array)) {
+      throw new Error("Must pass a transactions array");
+    }
+    if (!removedFolders) {
+      removedFolders = [];
+    }
+
+    let bmGuidsToRemove = [];
+    let totalItems = 0;
+
+    for (var i = 0; i < range.length; ++i) {
+      var node = range[i];
+      if (this._shouldSkipNode(node, removedFolders)) {
+        continue;
+      }
+
+      totalItems++;
+
+      if (PlacesUtils.nodeIsTagQuery(node.parent)) {
+        // This is a uri node inside a tag container.  It needs a special
+        // untag transaction.
+        let tag = node.parent.title || "";
+        if (!tag) {
+          // The parent may be the root node, that doesn't have a title.
+          tag = node.parent.query.tags[0];
+        }
+        transactions.push(PlacesTransactions.Untag({ urls: [node.uri], tag }));
+      } else if (
+        PlacesUtils.nodeIsTagQuery(node) &&
+        node.parent &&
+        PlacesUtils.nodeIsQuery(node.parent) &&
+        PlacesUtils.asQuery(node.parent).queryOptions.resultType ==
+          Ci.nsINavHistoryQueryOptions.RESULTS_AS_TAGS_ROOT
+      ) {
+        // 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 urls = new Set();
+        await PlacesUtils.bookmarks.fetch({ tags: [tag] }, b =>
+          urls.add(b.url)
+        );
+        transactions.push(
+          PlacesTransactions.Untag({ tag, urls: Array.from(urls) })
+        );
+      } 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.
+        await PlacesUtils.history.remove(node.uri).catch(console.error);
+        // 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.
+        await this._removeHistoryContainer(node).catch(console.error);
+        // 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);
+        }
+        bmGuidsToRemove.push(node.bookmarkGuid);
+      }
+    }
+    if (bmGuidsToRemove.length) {
+      transactions.push(PlacesTransactions.Remove({ guids: bmGuidsToRemove }));
+    }
+    return totalItems;
+  },
+
+  async _removeRowsFromBookmarks() {
+    let ranges = this._view.removableSelectionRanges;
+    let transactions = [];
+    let removedFolders = [];
+    let totalItems = 0;
+
+    for (let range of ranges) {
+      totalItems += await this._removeRange(
+        range,
+        transactions,
+        removedFolders
+      );
+    }
+
+    if (transactions.length) {
+      await PlacesUIUtils.batchUpdatesForNode(
+        this._view.result,
+        totalItems,
+        async () => {
+          await PlacesTransactions.batch(transactions);
+        }
+      );
+    }
+  },
+
+  /**
+   * Removes the set of selected ranges from history, asynchronously. History
+   * deletes are not undoable.
+   */
+  async _removeRowsFromHistory() {
+    let nodes = this._view.selectedNodes;
+    let URIs = new Set();
+    for (let i = 0; i < nodes.length; ++i) {
+      let node = nodes[i];
+      if (PlacesUtils.nodeIsURI(node)) {
+        URIs.add(node.uri);
+      } else if (
+        PlacesUtils.nodeIsQuery(node) &&
+        PlacesUtils.asQuery(node).queryOptions.queryType ==
+          Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY
+      ) {
+        await this._removeHistoryContainer(node).catch(console.error);
+      }
+    }
+
+    if (URIs.size) {
+      await PlacesUIUtils.batchUpdatesForNode(
+        this._view.result,
+        URIs.size,
+        async () => {
+          await PlacesUtils.history.remove([...URIs]);
+        }
+      );
+    }
+  },
+
+  /**
+   * Removes history visits for an history container node. History deletes are
+   * not undoable.
+   *
+   * @param {object} aContainerNode
+   *        The container node to remove.
+   */
+  async _removeHistoryContainer(aContainerNode) {
+    if (PlacesUtils.nodeIsHost(aContainerNode)) {
+      // This is a site container.
+      // Check if it's the container for local files (don't be fooled by the
+      // bogus string name, this is "(local files)").
+      let host =
+        "." +
+        (aContainerNode.title == PlacesUtils.getString("localhost")
+          ? ""
+          : aContainerNode.title);
+      // Will update faster if all children hidden before removing
+      aContainerNode.containerOpen = false;
+      await PlacesUtils.history.removeByFilter({ host });
+    } else if (PlacesUtils.nodeIsDay(aContainerNode)) {
+      // This is a day container.
+      let query = aContainerNode.query;
+      let beginTime = query.beginTime;
+      let endTime = query.endTime;
+      if (!query || !beginTime || !endTime) {
+        throw new Error("A valid date container query should exist!");
+      }
+      // Will update faster if all children hidden before removing
+      aContainerNode.containerOpen = false;
+      // 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.
+      await PlacesUtils.history.removeByFilter({
+        beginDate: PlacesUtils.toDate(beginTime + 1000),
+        endDate: PlacesUtils.toDate(endTime),
+      });
+    }
+  },
+
+  /**
+   * Removes the selection
+   */
+  async remove() {
+    if (!this._hasRemovableSelection()) {
+      return;
+    }
+
+    var root = this._view.result.root;
+
+    if (PlacesUtils.nodeIsFolder(root)) {
+      await this._removeRowsFromBookmarks();
+    } else if (PlacesUtils.nodeIsQuery(root)) {
+      var queryType = PlacesUtils.asQuery(root).queryOptions.queryType;
+      if (queryType == Ci.nsINavHistoryQueryOptions.QUERY_TYPE_BOOKMARKS) {
+        await this._removeRowsFromBookmarks();
+      } else if (queryType == Ci.nsINavHistoryQueryOptions.QUERY_TYPE_HISTORY) {
+        await this._removeRowsFromHistory();
+      } else {
+        throw new Error("implement support for QUERY_TYPE_UNIFIED");
+      }
+    } else {
+      throw new Error("unexpected root");
+    }
+  },
+
+  /**
+   * Fills a DataTransfer object with the content of the selection that can be
+   * dropped elsewhere.
+   *
+   * @param {object} 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) {
+      let wrapNode = PlacesUtils.wrapNode(node, type);
+      dt.mozSetDataAt(type, wrapNode, index);
+    }
+
+    function addURIData(index) {
+      addData(PlacesUtils.TYPE_X_MOZ_URL, index);
+      addData(PlacesUtils.TYPE_PLAINTEXT, index);
+      addData(PlacesUtils.TYPE_HTML, index);
+    }
+
+    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);
+        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);
+      Services.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) {
+      // This clears the logical clipboard, doesn't remove data.
+      Services.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(""));
+    Services.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_PLAINTEXT, 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);
+      }
+
+      contents.forEach(function (content) {
+        content.entries.push(PlacesUtils.wrapNode(node, content.type));
+      });
+    }, this);
+
+    function addData(type, data) {
+      xferable.addDataFlavor(type);
+      xferable.setTransferData(type, PlacesUtils.toISupportsString(data));
+    }
+
+    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) {
+        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) {
+      Services.clipboard.setData(
+        xferable,
+        aAction == "cut" ? 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);
+  },
+
+  /**
+   * 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
+   */
+  async paste() {
+    // No reason to proceed if there isn't a valid insertion point.
+    let ip = this._view.insertionPoint;
+    if (!ip) {
+      throw Components.Exception("", 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_PLAINTEXT,
+    ].forEach(type => xferable.addDataFlavor(type));
+
+    Services.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 doCopy = action == "copy";
+    let itemsToSelect = await PlacesUIUtils.handleTransferItems(
+      items,
+      ip,
+      doCopy,
+      this._view
+    );
+
+    // Cut/past operations are not repeatable, so clear the clipboard.
+    if (action == "cut") {
+      this._clearClipboard();
+    }
+
+    if (itemsToSelect.length) {
+      this._view.selectItems(itemsToSelect, false);
+    }
+  },
+
+  /**
+   * Checks if we can insert into a container.
+   *
+   * @param {object} container
+   *          The container were we are want to drop
+   * @returns {boolean}
+   */
+  disallowInsertion(container) {
+    if (!container) {
+      throw new Error("empty container");
+    }
+    // Allow dropping into Tag containers and editable folders.
+    return (
+      !PlacesUtils.nodeIsTagQuery(container) &&
+      (!PlacesUtils.nodeIsFolder(container) ||
+        PlacesUIUtils.isFolderReadOnly(container))
+    );
+  },
+
+  /**
+   * Determines if a node can be moved.
+   *
+   * @param {object} node
+   *        A nsINavHistoryResultNode node.
+   * @returns {boolean} True if the node can be moved, false otherwise.
+   */
+  canMoveNode(node) {
+    // Only bookmark items are movable.
+    if (node.itemId == -1) {
+      return false;
+    }
+
+    // Once tags and bookmarked are divorced, the tag-query check should be
+    // removed.
+    let parentNode = node.parent;
+    if (!parentNode) {
+      return false;
+    }
+
+    // Once tags and bookmarked are divorced, the tag-query check should be
+    // removed.
+    if (PlacesUtils.nodeIsTagQuery(parentNode)) {
+      return false;
+    }
+
+    return (
+      (PlacesUtils.nodeIsFolder(parentNode) &&
+        !PlacesUIUtils.isFolderReadOnly(parentNode)) ||
+      PlacesUtils.nodeIsQuery(parentNode)
+    );
+  },
+  async forgetAboutThisSite() {
+    let host;
+    if (PlacesUtils.nodeIsHost(this._view.selectedNode)) {
+      host = this._view.selectedNode.query.domain;
+    } else {
+      host = Services.io.newURI(this._view.selectedNode.uri).host;
+    }
+    let baseDomain;
+    try {
+      baseDomain = Services.eTLD.getBaseDomainFromHost(host);
+    } catch (e) {
+      // If there is no baseDomain we fall back to host
+    }
+    const [title, body, forget] = await document.l10n.formatValues([
+      { id: "places-forget-about-this-site-confirmation-title" },
+      {
+        id: "places-forget-about-this-site-confirmation-msg",
+        args: { hostOrBaseDomain: baseDomain ?? host },
+      },
+      { id: "places-forget-about-this-site-forget" },
+    ]);
+
+    const flags =
+      Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +
+      Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1 +
+      Services.prompt.BUTTON_POS_1_DEFAULT;
+
+    let bag = await Services.prompt.asyncConfirmEx(
+      window.browsingContext,
+      Services.prompt.MODAL_TYPE_INTERNAL_WINDOW,
+      title,
+      body,
+      flags,
+      forget,
+      null,
+      null,
+      null,
+      false
+    );
+    if (bag.getProperty("buttonNumClicked") !== 0) {
+      return;
+    }
+
+    if (this.forgetSiteClearByBaseDomain) {
+      await this.ForgetAboutSite.removeDataFromBaseDomain(host);
+    } else {
+      await this.ForgetAboutSite.removeDataFromDomain(host);
+    }
+  },
+
+  showInFolder(aBookmarkGuid) {
+    // Open containing folder in left pane/sidebar bookmark tree
+    let documentUrl = document.documentURI.toLowerCase();
+    if (documentUrl.endsWith("browser.xhtml")) {
+      // We're in a menu or a panel.
+      window.SidebarUI._show("viewBookmarksSidebar").then(() => {
+        let theSidebar = document.getElementById("sidebar");
+        theSidebar.contentDocument
+          .getElementById("bookmarks-view")
+          .selectItems([aBookmarkGuid]);
+      });
+    } else if (documentUrl.includes("sidebar")) {
+      // We're in the sidebar - clear the search box first
+      let searchBox = document.getElementById("search-box");
+      searchBox.value = "";
+      searchBox.doCommand();
+
+      // And go to the node
+      this._view.selectItems([aBookmarkGuid], true);
+    } else {
+      // We're in the bookmark library/manager
+      PlacesUtils.bookmarks
+        .fetch(aBookmarkGuid, null, { includePath: true })
+        .then(b => {
+          let containers = b.path.map(obj => {
+            return obj.guid;
+          });
+          // selectLeftPane looks for literal "AllBookmarks" as a "built-in"
+          containers.splice(0, 0, "AllBookmarks");
+          PlacesOrganizer.selectLeftPaneContainerByHierarchy(containers);
+          this._view.selectItems([aBookmarkGuid], false);
+        });
+    }
+  },
+};
+
+/**
+ * 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 = {
+  /**
+   * For views using DOM nodes like toolbars, menus and panels, this is the DOM
+   * element currently being dragged over. For other views not handling DOM
+   * nodes, like trees, it is a Places result node instead.
+   */
+  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 {object} node
+   *        The container node
+   * @returns {boolean} 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;
+  },
+
+  /**
+   * @returns {object|null} The current active drag session. Returns null if there is none.
+   */
+  getSession: function PCDH__getSession() {
+    return this.dragService.getCurrentSession();
+  },
+
+  /**
+   * Extract the most relevant flavor from a list of flavors.
+   *
+   * @param {DOMStringList} flavors The flavors list.
+   * @returns {string} The most relevant flavor, or undefined.
+   */
+  getMostRelevantFlavor(flavors) {
+    // The DnD API returns a DOMStringList, but tests may pass an Array.
+    flavors = Array.from(flavors);
+    return PlacesUIUtils.SUPPORTED_FLAVORS.find(f => flavors.includes(f));
+  },
+
+  /**
+   * Determines whether or not the data currently being dragged can be dropped
+   * on a places view.
+   *
+   * @param {object} ip
+   *        The insertion point where the items should be dropped.
+   * @param {object} dt
+   *        The data transfer object.
+   * @returns {boolean}
+   */
+  canDrop: function PCDH_canDrop(ip, dt) {
+    let dropCount = dt.mozItemCount;
+
+    // Check every dragged item.
+    for (let i = 0; i < dropCount; i++) {
+      let flavor = this.getMostRelevantFlavor(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 nodes;
+      try {
+        nodes = PlacesUtils.unwrapNodes(data, flavor);
+      } catch (e) {
+        return false;
+      }
+
+      for (let dragged of nodes) {
+        // 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;
+        }
+
+        // Disallow dropping of a folder on itself or any of its descendants.
+        // This check is done to show an appropriate drop indicator, a stricter
+        // check is done later by the bookmarks API.
+        if (
+          dragged.type == PlacesUtils.TYPE_X_MOZ_PLACE_CONTAINER ||
+          (dragged.uri && dragged.uri.startsWith("place:"))
+        ) {
+          let dragOverPlacesNode = this.currentDropTarget;
+          if (!(dragOverPlacesNode instanceof Ci.nsINavHistoryResultNode)) {
+            // If it's a DOM node, it should have a _placesNode expando, or it
+            // may be a static element in a places container, like the [empty]
+            // menuitem.
+            dragOverPlacesNode =
+              dragOverPlacesNode._placesNode ??
+              dragOverPlacesNode.parentNode?._placesNode;
+          }
+
+          // If we couldn't get a target Places result node then we can't check
+          // whether the drag is allowed, just let it go through.
+          if (dragOverPlacesNode) {
+            let guid = dragged.concreteGuid ?? dragged.itemGuid;
+            // Dragging over itself.
+            if (PlacesUtils.getConcreteItemGuid(dragOverPlacesNode) == guid) {
+              return false;
+            }
+            // Dragging over a descendant.
+            for (let ancestor of PlacesUtils.nodeAncestors(
+              dragOverPlacesNode
+            )) {
+              if (PlacesUtils.getConcreteItemGuid(ancestor) == guid) {
+                return false;
+              }
+            }
+          }
+        }
+
+        // Disallow the dropping of multiple bookmarks if they include
+        // a javascript: bookmarklet
+        if (
+          !flavor.startsWith("text/x-moz-place") &&
+          (nodes.length > 1 || dropCount > 1) &&
+          nodes.some(n => n.uri?.startsWith("javascript:"))
+        ) {
+          return false;
+        }
+      }
+    }
+    return true;
+  },
+
+  /**
+   * Handles the drop of one or more items onto a view.
+   *
+   * @param {object} insertionPoint The insertion point where the items should
+   *                                be dropped.
+   * @param {object} dt             The dataTransfer information for the drop.
+   * @param {object} [view]         The view or the tree element. This allows
+   *                                batching to take place.
+   */
+  async onDrop(insertionPoint, dt, view) {
+    let doCopy = ["copy", "link"].includes(dt.dropEffect);
+
+    let dropCount = dt.mozItemCount;
+
+    // Following flavors may contain duplicated data.
+    let duplicable = new Map();
+    duplicable.set(PlacesUtils.TYPE_PLAINTEXT, new Set());
+    duplicable.set(PlacesUtils.TYPE_X_MOZ_URL, new Set());
+
+    // Collect all data from the DataTransfer before processing it, as the
+    // DataTransfer is only valid during the synchronous handling of the `drop`
+    // event handler callback.
+    let nodes = [];
+    let externalDrag = false;
+    for (let i = 0; i < dropCount; ++i) {
+      let flavor = this.getMostRelevantFlavor(dt.mozTypesAt(i));
+      if (!flavor) {
+        return;
+      }
+
+      let data = dt.mozGetDataAt(flavor, i);
+      if (duplicable.has(flavor)) {
+        let handled = duplicable.get(flavor);
+        if (handled.has(data)) {
+          continue;
+        }
+        handled.add(data);
+      }
+
+      // Check that the drag/drop is not internal
+      if (i == 0 && !flavor.startsWith("text/x-moz-place")) {
+        externalDrag = true;
+      }
+
+      if (flavor != TAB_DROP_TYPE) {
+        nodes = [...nodes, ...PlacesUtils.unwrapNodes(data, flavor)];
+      } else if (
+        XULElement.isInstance(data) &&
+        data.localName == "tab" &&
+        data.ownerGlobal.isChromeWindow
+      ) {
+        let uri = data.linkedBrowser.currentURI;
+        let spec = uri ? uri.spec : "about:blank";
+        nodes.push({
+          uri: spec,
+          title: data.label,
+          type: PlacesUtils.TYPE_X_MOZ_URL,
+        });
+      } else {
+        throw new Error("bogus data was passed as a tab");
+      }
+    }
+
+    // If a multiple urls are being dropped from the urlbar or an external source,
+    // and they include javascript url, not bookmark any of them
+    if (
+      externalDrag &&
+      (nodes.length > 1 || dropCount > 1) &&
+      nodes.some(n => n.uri?.startsWith("javascript:"))
+    ) {
+      throw new Error("Javascript bookmarklet passed with uris");
+    }
+
+    // If a single javascript url is being dropped from the urlbar or an external source,
+    // show the bookmark dialog as a speedbump protection against malicious cases.
+    if (
+      nodes.length == 1 &&
+      externalDrag &&
+      nodes[0].uri?.startsWith("javascript")
+    ) {
+      let uri;
+      try {
+        uri = Services.io.newURI(nodes[0].uri);
+      } catch (ex) {
+        // Invalid uri, we skip this code and the entry will be discarded later.
+      }
+
+      if (uri) {
+        let bookmarkGuid = await PlacesUIUtils.showBookmarkDialog(
+          {
+            action: "add",
+            type: "bookmark",
+            defaultInsertionPoint: insertionPoint,
+            hiddenRows: ["folderPicker"],
+            title: nodes[0].title,
+            uri,
+          },
+          BrowserWindowTracker.getTopWindow() // `window` may be the Library.
+        );
+
+        if (bookmarkGuid && view) {
+          view.selectItems([bookmarkGuid], false);
+        }
+
+        return;
+      }
+    }
+
+    await PlacesUIUtils.handleTransferItems(
+      nodes,
+      insertionPoint,
+      doCopy,
+      view
+    );
+  },
+};
+
+XPCOMUtils.defineLazyServiceGetter(
+  PlacesControllerDragHelper,
+  "dragService",
+  "@mozilla.org/widget/dragservice;1",
+  "nsIDragService"
+);