Add m-esr52 at 52.6.0

1 files changed, 2409 insertions, 0 deletions

diff --git a/editor/libeditor/HTMLEditorDataTransfer.cpp b/editor/libeditor/HTMLEditorDataTransfer.cpp
new file mode 100644
index 000000000..b9cd8adb9
--- /dev/null
+++ b/editor/libeditor/HTMLEditorDataTransfer.cpp
@@ -0,0 +1,2409 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 et tw=78: */
+/* 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/. */
+
+#include "mozilla/HTMLEditor.h"
+
+#include <string.h>
+
+#include "HTMLEditUtils.h"
+#include "TextEditUtils.h"
+#include "WSRunObject.h"
+#include "mozilla/dom/DataTransfer.h"
+#include "mozilla/dom/DocumentFragment.h"
+#include "mozilla/dom/DOMStringList.h"
+#include "mozilla/dom/Selection.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Base64.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EditorUtils.h"
+#include "mozilla/OwningNonNull.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/SelectionState.h"
+#include "nsAString.h"
+#include "nsCOMPtr.h"
+#include "nsCRTGlue.h" // for CRLF
+#include "nsComponentManagerUtils.h"
+#include "nsIScriptError.h"
+#include "nsContentUtils.h"
+#include "nsDebug.h"
+#include "nsDependentSubstring.h"
+#include "nsError.h"
+#include "nsGkAtoms.h"
+#include "nsIClipboard.h"
+#include "nsIContent.h"
+#include "nsIContentFilter.h"
+#include "nsIDOMComment.h"
+#include "nsIDOMDocument.h"
+#include "nsIDOMDocumentFragment.h"
+#include "nsIDOMElement.h"
+#include "nsIDOMHTMLAnchorElement.h"
+#include "nsIDOMHTMLEmbedElement.h"
+#include "nsIDOMHTMLFrameElement.h"
+#include "nsIDOMHTMLIFrameElement.h"
+#include "nsIDOMHTMLImageElement.h"
+#include "nsIDOMHTMLInputElement.h"
+#include "nsIDOMHTMLLinkElement.h"
+#include "nsIDOMHTMLObjectElement.h"
+#include "nsIDOMHTMLScriptElement.h"
+#include "nsIDOMNode.h"
+#include "nsIDocument.h"
+#include "nsIEditor.h"
+#include "nsIEditorIMESupport.h"
+#include "nsIEditorMailSupport.h"
+#include "nsIEditRules.h"
+#include "nsIFile.h"
+#include "nsIInputStream.h"
+#include "nsIMIMEService.h"
+#include "nsNameSpaceManager.h"
+#include "nsINode.h"
+#include "nsIParserUtils.h"
+#include "nsIPlaintextEditor.h"
+#include "nsISupportsImpl.h"
+#include "nsISupportsPrimitives.h"
+#include "nsISupportsUtils.h"
+#include "nsITransferable.h"
+#include "nsIURI.h"
+#include "nsIVariant.h"
+#include "nsLinebreakConverter.h"
+#include "nsLiteralString.h"
+#include "nsNetUtil.h"
+#include "nsRange.h"
+#include "nsReadableUtils.h"
+#include "nsServiceManagerUtils.h"
+#include "nsStreamUtils.h"
+#include "nsString.h"
+#include "nsStringFwd.h"
+#include "nsStringIterator.h"
+#include "nsSubstringTuple.h"
+#include "nsTreeSanitizer.h"
+#include "nsXPCOM.h"
+#include "nscore.h"
+#include "nsContentUtils.h"
+
+class nsIAtom;
+class nsILoadContext;
+class nsISupports;
+
+namespace mozilla {
+
+using namespace dom;
+
+#define kInsertCookie  "_moz_Insert Here_moz_"
+
+// some little helpers
+static bool FindIntegerAfterString(const char* aLeadingString,
+                                   nsCString& aCStr, int32_t& foundNumber);
+static nsresult RemoveFragComments(nsCString& theStr);
+static void RemoveBodyAndHead(nsINode& aNode);
+static nsresult FindTargetNode(nsIDOMNode* aStart,
+                               nsCOMPtr<nsIDOMNode>& aResult);
+
+nsresult
+HTMLEditor::LoadHTML(const nsAString& aInputString)
+{
+  NS_ENSURE_TRUE(mRules, NS_ERROR_NOT_INITIALIZED);
+
+  // force IME commit; set up rules sniffing and batching
+  ForceCompositionEnd();
+  AutoEditBatch beginBatching(this);
+  AutoRules beginRulesSniffing(this, EditAction::loadHTML, nsIEditor::eNext);
+
+  // Get selection
+  RefPtr<Selection> selection = GetSelection();
+  NS_ENSURE_STATE(selection);
+
+  TextRulesInfo ruleInfo(EditAction::loadHTML);
+  bool cancel, handled;
+  // Protect the edit rules object from dying
+  nsCOMPtr<nsIEditRules> rules(mRules);
+  nsresult rv = rules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (cancel) {
+    return NS_OK; // rules canceled the operation
+  }
+
+  if (!handled) {
+    // Delete Selection, but only if it isn't collapsed, see bug #106269
+    if (!selection->Collapsed()) {
+      rv = DeleteSelection(eNone, eStrip);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    // Get the first range in the selection, for context:
+    RefPtr<nsRange> range = selection->GetRangeAt(0);
+    NS_ENSURE_TRUE(range, NS_ERROR_NULL_POINTER);
+
+    // create fragment for pasted html
+    nsCOMPtr<nsIDOMDocumentFragment> docfrag;
+    rv = range->CreateContextualFragment(aInputString, getter_AddRefs(docfrag));
+    NS_ENSURE_SUCCESS(rv, rv);
+    // put the fragment into the document
+    nsCOMPtr<nsIDOMNode> parent;
+    rv = range->GetStartContainer(getter_AddRefs(parent));
+    NS_ENSURE_SUCCESS(rv, rv);
+    NS_ENSURE_TRUE(parent, NS_ERROR_NULL_POINTER);
+    int32_t childOffset;
+    rv = range->GetStartOffset(&childOffset);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIDOMNode> nodeToInsert;
+    docfrag->GetFirstChild(getter_AddRefs(nodeToInsert));
+    while (nodeToInsert) {
+      rv = InsertNode(nodeToInsert, parent, childOffset++);
+      NS_ENSURE_SUCCESS(rv, rv);
+      docfrag->GetFirstChild(getter_AddRefs(nodeToInsert));
+    }
+  }
+
+  return rules->DidDoAction(selection, &ruleInfo, rv);
+}
+
+NS_IMETHODIMP
+HTMLEditor::InsertHTML(const nsAString& aInString)
+{
+  const nsAFlatString& empty = EmptyString();
+
+  return InsertHTMLWithContext(aInString, empty, empty, empty,
+                               nullptr,  nullptr, 0, true);
+}
+
+nsresult
+HTMLEditor::InsertHTMLWithContext(const nsAString& aInputString,
+                                  const nsAString& aContextStr,
+                                  const nsAString& aInfoStr,
+                                  const nsAString& aFlavor,
+                                  nsIDOMDocument* aSourceDoc,
+                                  nsIDOMNode* aDestNode,
+                                  int32_t aDestOffset,
+                                  bool aDeleteSelection)
+{
+  return DoInsertHTMLWithContext(aInputString, aContextStr, aInfoStr,
+      aFlavor, aSourceDoc, aDestNode, aDestOffset, aDeleteSelection,
+      /* trusted input */ true, /* clear style */ false);
+}
+
+nsresult
+HTMLEditor::DoInsertHTMLWithContext(const nsAString& aInputString,
+                                    const nsAString& aContextStr,
+                                    const nsAString& aInfoStr,
+                                    const nsAString& aFlavor,
+                                    nsIDOMDocument* aSourceDoc,
+                                    nsIDOMNode* aDestNode,
+                                    int32_t aDestOffset,
+                                    bool aDeleteSelection,
+                                    bool aTrustedInput,
+                                    bool aClearStyle)
+{
+  NS_ENSURE_TRUE(mRules, NS_ERROR_NOT_INITIALIZED);
+
+  // Prevent the edit rules object from dying
+  nsCOMPtr<nsIEditRules> rules(mRules);
+
+  // force IME commit; set up rules sniffing and batching
+  ForceCompositionEnd();
+  AutoEditBatch beginBatching(this);
+  AutoRules beginRulesSniffing(this, EditAction::htmlPaste, nsIEditor::eNext);
+
+  // Get selection
+  RefPtr<Selection> selection = GetSelection();
+  NS_ENSURE_STATE(selection);
+
+  // create a dom document fragment that represents the structure to paste
+  nsCOMPtr<nsIDOMNode> fragmentAsNode, streamStartParent, streamEndParent;
+  int32_t streamStartOffset = 0, streamEndOffset = 0;
+
+  nsresult rv = CreateDOMFragmentFromPaste(aInputString, aContextStr, aInfoStr,
+                                           address_of(fragmentAsNode),
+                                           address_of(streamStartParent),
+                                           address_of(streamEndParent),
+                                           &streamStartOffset,
+                                           &streamEndOffset,
+                                           aTrustedInput);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIDOMNode> targetNode;
+  int32_t targetOffset=0;
+
+  if (!aDestNode) {
+    // if caller didn't provide the destination/target node,
+    // fetch the paste insertion point from our selection
+    rv = GetStartNodeAndOffset(selection, getter_AddRefs(targetNode), &targetOffset);
+    NS_ENSURE_SUCCESS(rv, rv);
+    if (!targetNode || !IsEditable(targetNode)) {
+      return NS_ERROR_FAILURE;
+    }
+  } else {
+    targetNode = aDestNode;
+    targetOffset = aDestOffset;
+  }
+
+  bool doContinue = true;
+
+  rv = DoContentFilterCallback(aFlavor, aSourceDoc, aDeleteSelection,
+                               (nsIDOMNode **)address_of(fragmentAsNode),
+                               (nsIDOMNode **)address_of(streamStartParent),
+                               &streamStartOffset,
+                               (nsIDOMNode **)address_of(streamEndParent),
+                               &streamEndOffset,
+                               (nsIDOMNode **)address_of(targetNode),
+                               &targetOffset, &doContinue);
+
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(doContinue, NS_OK);
+
+  // if we have a destination / target node, we want to insert there
+  // rather than in place of the selection
+  // ignore aDeleteSelection here if no aDestNode since deletion will
+  // also occur later; this block is intended to cover the various
+  // scenarios where we are dropping in an editor (and may want to delete
+  // the selection before collapsing the selection in the new destination)
+  if (aDestNode) {
+    if (aDeleteSelection) {
+      // Use an auto tracker so that our drop point is correctly
+      // positioned after the delete.
+      AutoTrackDOMPoint tracker(mRangeUpdater, &targetNode, &targetOffset);
+      rv = DeleteSelection(eNone, eStrip);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    rv = selection->Collapse(targetNode, targetOffset);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  // we need to recalculate various things based on potentially new offsets
+  // this is work to be completed at a later date (probably by jfrancis)
+
+  // make a list of what nodes in docFrag we need to move
+  nsTArray<OwningNonNull<nsINode>> nodeList;
+  nsCOMPtr<nsINode> fragmentAsNodeNode = do_QueryInterface(fragmentAsNode);
+  NS_ENSURE_STATE(fragmentAsNodeNode || !fragmentAsNode);
+  nsCOMPtr<nsINode> streamStartParentNode =
+    do_QueryInterface(streamStartParent);
+  NS_ENSURE_STATE(streamStartParentNode || !streamStartParent);
+  nsCOMPtr<nsINode> streamEndParentNode =
+    do_QueryInterface(streamEndParent);
+  NS_ENSURE_STATE(streamEndParentNode || !streamEndParent);
+  CreateListOfNodesToPaste(*static_cast<DocumentFragment*>(fragmentAsNodeNode.get()),
+                           nodeList,
+                           streamStartParentNode, streamStartOffset,
+                           streamEndParentNode, streamEndOffset);
+
+  if (nodeList.IsEmpty()) {
+    // We aren't inserting anything, but if aDeleteSelection is set, we do want
+    // to delete everything.
+    if (aDeleteSelection) {
+      return DeleteSelection(eNone, eStrip);
+    }
+    return NS_OK;
+  }
+
+  // Are there any table elements in the list?
+  // node and offset for insertion
+  nsCOMPtr<nsIDOMNode> parentNode;
+  int32_t offsetOfNewNode;
+
+  // check for table cell selection mode
+  bool cellSelectionMode = false;
+  nsCOMPtr<nsIDOMElement> cell;
+  rv = GetFirstSelectedCell(nullptr, getter_AddRefs(cell));
+  if (NS_SUCCEEDED(rv) && cell) {
+    cellSelectionMode = true;
+  }
+
+  if (cellSelectionMode) {
+    // do we have table content to paste?  If so, we want to delete
+    // the selected table cells and replace with new table elements;
+    // but if not we want to delete _contents_ of cells and replace
+    // with non-table elements.  Use cellSelectionMode bool to
+    // indicate results.
+    if (!HTMLEditUtils::IsTableElement(nodeList[0])) {
+      cellSelectionMode = false;
+    }
+  }
+
+  if (!cellSelectionMode) {
+    rv = DeleteSelectionAndPrepareToCreateNode();
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (aClearStyle) {
+      // pasting does not inherit local inline styles
+      nsCOMPtr<nsINode> tmpNode = selection->GetAnchorNode();
+      int32_t tmpOffset = static_cast<int32_t>(selection->AnchorOffset());
+      rv = ClearStyle(address_of(tmpNode), &tmpOffset, nullptr, nullptr);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+  } else {
+    // Delete whole cells: we will replace with new table content.
+
+    // Braces for artificial block to scope AutoSelectionRestorer.
+    // Save current selection since DeleteTableCell() perturbs it.
+    {
+      AutoSelectionRestorer selectionRestorer(selection, this);
+      rv = DeleteTableCell(1);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+    // collapse selection to beginning of deleted table content
+    selection->CollapseToStart();
+  }
+
+  // give rules a chance to handle or cancel
+  TextRulesInfo ruleInfo(EditAction::insertElement);
+  bool cancel, handled;
+  rv = rules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (cancel) {
+    return NS_OK; // rules canceled the operation
+  }
+
+  if (!handled) {
+    // The rules code (WillDoAction above) might have changed the selection.
+    // refresh our memory...
+    rv = GetStartNodeAndOffset(selection, getter_AddRefs(parentNode), &offsetOfNewNode);
+    NS_ENSURE_SUCCESS(rv, rv);
+    NS_ENSURE_TRUE(parentNode, NS_ERROR_FAILURE);
+
+    // Adjust position based on the first node we are going to insert.
+    NormalizeEOLInsertPosition(nodeList[0], address_of(parentNode),
+                               &offsetOfNewNode);
+
+    // if there are any invisible br's after our insertion point, remove them.
+    // this is because if there is a br at end of what we paste, it will make
+    // the invisible br visible.
+    WSRunObject wsObj(this, parentNode, offsetOfNewNode);
+    if (wsObj.mEndReasonNode &&
+        TextEditUtils::IsBreak(wsObj.mEndReasonNode) &&
+        !IsVisBreak(wsObj.mEndReasonNode)) {
+      rv = DeleteNode(wsObj.mEndReasonNode);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    // Remember if we are in a link.
+    bool bStartedInLink = IsInLink(parentNode);
+
+    // Are we in a text node? If so, split it.
+    if (IsTextNode(parentNode)) {
+      nsCOMPtr<nsIContent> parentContent = do_QueryInterface(parentNode);
+      NS_ENSURE_STATE(parentContent || !parentNode);
+      offsetOfNewNode = SplitNodeDeep(*parentContent, *parentContent,
+                                      offsetOfNewNode);
+      NS_ENSURE_STATE(offsetOfNewNode != -1);
+      nsCOMPtr<nsIDOMNode> temp;
+      rv = parentNode->GetParentNode(getter_AddRefs(temp));
+      NS_ENSURE_SUCCESS(rv, rv);
+      parentNode = temp;
+    }
+
+    // build up list of parents of first node in list that are either
+    // lists or tables.  First examine front of paste node list.
+    nsTArray<OwningNonNull<Element>> startListAndTableArray;
+    GetListAndTableParents(StartOrEnd::start, nodeList,
+                           startListAndTableArray);
+
+    // remember number of lists and tables above us
+    int32_t highWaterMark = -1;
+    if (!startListAndTableArray.IsEmpty()) {
+      highWaterMark = DiscoverPartialListsAndTables(nodeList,
+                                                    startListAndTableArray);
+    }
+
+    // if we have pieces of tables or lists to be inserted, let's force the paste
+    // to deal with table elements right away, so that it doesn't orphan some
+    // table or list contents outside the table or list.
+    if (highWaterMark >= 0) {
+      ReplaceOrphanedStructure(StartOrEnd::start, nodeList,
+                               startListAndTableArray, highWaterMark);
+    }
+
+    // Now go through the same process again for the end of the paste node list.
+    nsTArray<OwningNonNull<Element>> endListAndTableArray;
+    GetListAndTableParents(StartOrEnd::end, nodeList, endListAndTableArray);
+    highWaterMark = -1;
+
+    // remember number of lists and tables above us
+    if (!endListAndTableArray.IsEmpty()) {
+      highWaterMark = DiscoverPartialListsAndTables(nodeList,
+                                                    endListAndTableArray);
+    }
+
+    // don't orphan partial list or table structure
+    if (highWaterMark >= 0) {
+      ReplaceOrphanedStructure(StartOrEnd::end, nodeList,
+                               endListAndTableArray, highWaterMark);
+    }
+
+    // Loop over the node list and paste the nodes:
+    nsCOMPtr<nsIDOMNode> parentBlock, lastInsertNode, insertedContextParent;
+    nsCOMPtr<nsINode> parentNodeNode = do_QueryInterface(parentNode);
+    NS_ENSURE_STATE(parentNodeNode || !parentNode);
+    if (IsBlockNode(parentNodeNode)) {
+      parentBlock = parentNode;
+    } else {
+      parentBlock = GetBlockNodeParent(parentNode);
+    }
+
+    int32_t listCount = nodeList.Length();
+    for (int32_t j = 0; j < listCount; j++) {
+      bool bDidInsert = false;
+      nsCOMPtr<nsIDOMNode> curNode = nodeList[j]->AsDOMNode();
+
+      NS_ENSURE_TRUE(curNode, NS_ERROR_FAILURE);
+      NS_ENSURE_TRUE(curNode != fragmentAsNode, NS_ERROR_FAILURE);
+      NS_ENSURE_TRUE(!TextEditUtils::IsBody(curNode), NS_ERROR_FAILURE);
+
+      if (insertedContextParent) {
+        // if we had to insert something higher up in the paste hierarchy, we want to
+        // skip any further paste nodes that descend from that.  Else we will paste twice.
+        if (EditorUtils::IsDescendantOf(curNode, insertedContextParent)) {
+          continue;
+        }
+      }
+
+      // give the user a hand on table element insertion.  if they have
+      // a table or table row on the clipboard, and are trying to insert
+      // into a table or table row, insert the appropriate children instead.
+      if (HTMLEditUtils::IsTableRow(curNode) &&
+          HTMLEditUtils::IsTableRow(parentNode) &&
+          (HTMLEditUtils::IsTable(curNode) ||
+           HTMLEditUtils::IsTable(parentNode))) {
+        nsCOMPtr<nsIDOMNode> child;
+        curNode->GetFirstChild(getter_AddRefs(child));
+        while (child) {
+          rv = InsertNodeAtPoint(child, address_of(parentNode), &offsetOfNewNode, true);
+          if (NS_FAILED(rv)) {
+            break;
+          }
+
+          bDidInsert = true;
+          lastInsertNode = child;
+          offsetOfNewNode++;
+
+          curNode->GetFirstChild(getter_AddRefs(child));
+        }
+      }
+      // give the user a hand on list insertion.  if they have
+      // a list on the clipboard, and are trying to insert
+      // into a list or list item, insert the appropriate children instead,
+      // ie, merge the lists instead of pasting in a sublist.
+      else if (HTMLEditUtils::IsList(curNode) &&
+               (HTMLEditUtils::IsList(parentNode) ||
+                HTMLEditUtils::IsListItem(parentNode))) {
+        nsCOMPtr<nsIDOMNode> child, tmp;
+        curNode->GetFirstChild(getter_AddRefs(child));
+        while (child) {
+          if (HTMLEditUtils::IsListItem(child) ||
+              HTMLEditUtils::IsList(child)) {
+            // Check if we are pasting into empty list item. If so
+            // delete it and paste into parent list instead.
+            if (HTMLEditUtils::IsListItem(parentNode)) {
+              bool isEmpty;
+              rv = IsEmptyNode(parentNode, &isEmpty, true);
+              if (NS_SUCCEEDED(rv) && isEmpty) {
+                int32_t newOffset;
+                nsCOMPtr<nsIDOMNode> listNode = GetNodeLocation(parentNode, &newOffset);
+                if (listNode) {
+                  DeleteNode(parentNode);
+                  parentNode = listNode;
+                  offsetOfNewNode = newOffset;
+                }
+              }
+            }
+            rv = InsertNodeAtPoint(child, address_of(parentNode), &offsetOfNewNode, true);
+            if (NS_FAILED(rv)) {
+              break;
+            }
+
+            bDidInsert = true;
+            lastInsertNode = child;
+            offsetOfNewNode++;
+          } else {
+            curNode->RemoveChild(child, getter_AddRefs(tmp));
+          }
+          curNode->GetFirstChild(getter_AddRefs(child));
+        }
+      } else if (parentBlock && HTMLEditUtils::IsPre(parentBlock) &&
+                 HTMLEditUtils::IsPre(curNode)) {
+        // Check for pre's going into pre's.
+        nsCOMPtr<nsIDOMNode> child;
+        curNode->GetFirstChild(getter_AddRefs(child));
+        while (child) {
+          rv = InsertNodeAtPoint(child, address_of(parentNode), &offsetOfNewNode, true);
+          if (NS_FAILED(rv)) {
+            break;
+          }
+
+          bDidInsert = true;
+          lastInsertNode = child;
+          offsetOfNewNode++;
+
+          curNode->GetFirstChild(getter_AddRefs(child));
+        }
+      }
+
+      if (!bDidInsert || NS_FAILED(rv)) {
+        // try to insert
+        rv = InsertNodeAtPoint(curNode, address_of(parentNode), &offsetOfNewNode, true);
+        if (NS_SUCCEEDED(rv)) {
+          bDidInsert = true;
+          lastInsertNode = curNode;
+        }
+
+        // Assume failure means no legal parent in the document hierarchy,
+        // try again with the parent of curNode in the paste hierarchy.
+        nsCOMPtr<nsIDOMNode> parent;
+        while (NS_FAILED(rv) && curNode) {
+          curNode->GetParentNode(getter_AddRefs(parent));
+          if (parent && !TextEditUtils::IsBody(parent)) {
+            rv = InsertNodeAtPoint(parent, address_of(parentNode), &offsetOfNewNode, true);
+            if (NS_SUCCEEDED(rv)) {
+              bDidInsert = true;
+              insertedContextParent = parent;
+              lastInsertNode = GetChildAt(parentNode, offsetOfNewNode);
+            }
+          }
+          curNode = parent;
+        }
+      }
+      if (lastInsertNode) {
+        parentNode = GetNodeLocation(lastInsertNode, &offsetOfNewNode);
+        offsetOfNewNode++;
+      }
+    }
+
+    // Now collapse the selection to the end of what we just inserted:
+    if (lastInsertNode) {
+      // set selection to the end of what we just pasted.
+      nsCOMPtr<nsIDOMNode> selNode, tmp, highTable;
+      int32_t selOffset;
+
+      // but don't cross tables
+      if (!HTMLEditUtils::IsTable(lastInsertNode)) {
+        nsCOMPtr<nsINode> lastInsertNode_ = do_QueryInterface(lastInsertNode);
+        NS_ENSURE_STATE(lastInsertNode_ || !lastInsertNode);
+        selNode = GetAsDOMNode(GetLastEditableLeaf(*lastInsertNode_));
+        tmp = selNode;
+        while (tmp && tmp != lastInsertNode) {
+          if (HTMLEditUtils::IsTable(tmp)) {
+            highTable = tmp;
+          }
+          nsCOMPtr<nsIDOMNode> parent = tmp;
+          tmp->GetParentNode(getter_AddRefs(parent));
+          tmp = parent;
+        }
+        if (highTable) {
+          selNode = highTable;
+        }
+      }
+      if (!selNode) {
+        selNode = lastInsertNode;
+      }
+      if (IsTextNode(selNode) ||
+          (IsContainer(selNode) && !HTMLEditUtils::IsTable(selNode))) {
+        rv = GetLengthOfDOMNode(selNode, (uint32_t&)selOffset);
+        NS_ENSURE_SUCCESS(rv, rv);
+      } else {
+        // We need to find a container for selection.  Look up.
+        tmp = selNode;
+        selNode = GetNodeLocation(tmp, &selOffset);
+        // selNode might be null in case a mutation listener removed
+        // the stuff we just inserted from the DOM.
+        NS_ENSURE_STATE(selNode);
+        ++selOffset;  // want to be *after* last leaf node in paste
+      }
+
+      // make sure we don't end up with selection collapsed after an invisible break node
+      WSRunObject wsRunObj(this, selNode, selOffset);
+      nsCOMPtr<nsINode> visNode;
+      int32_t outVisOffset=0;
+      WSType visType;
+      nsCOMPtr<nsINode> selNode_(do_QueryInterface(selNode));
+      wsRunObj.PriorVisibleNode(selNode_, selOffset, address_of(visNode),
+                                &outVisOffset, &visType);
+      if (visType == WSType::br) {
+        // we are after a break.  Is it visible?  Despite the name,
+        // PriorVisibleNode does not make that determination for breaks.
+        // It also may not return the break in visNode.  We have to pull it
+        // out of the WSRunObject's state.
+        if (!IsVisBreak(wsRunObj.mStartReasonNode)) {
+          // don't leave selection past an invisible break;
+          // reset {selNode,selOffset} to point before break
+          selNode = GetNodeLocation(GetAsDOMNode(wsRunObj.mStartReasonNode), &selOffset);
+          // we want to be inside any inline style prior to break
+          WSRunObject wsRunObj(this, selNode, selOffset);
+          selNode_ = do_QueryInterface(selNode);
+          wsRunObj.PriorVisibleNode(selNode_, selOffset, address_of(visNode),
+                                    &outVisOffset, &visType);
+          if (visType == WSType::text || visType == WSType::normalWS) {
+            selNode = GetAsDOMNode(visNode);
+            selOffset = outVisOffset;  // PriorVisibleNode already set offset to _after_ the text or ws
+          } else if (visType == WSType::special) {
+            // prior visible thing is an image or some other non-text thingy.
+            // We want to be right after it.
+            selNode = GetNodeLocation(GetAsDOMNode(wsRunObj.mStartReasonNode), &selOffset);
+            ++selOffset;
+          }
+        }
+      }
+      selection->Collapse(selNode, selOffset);
+
+      // if we just pasted a link, discontinue link style
+      nsCOMPtr<nsIDOMNode> link;
+      if (!bStartedInLink && IsInLink(selNode, address_of(link))) {
+        // so, if we just pasted a link, I split it.  Why do that instead of just
+        // nudging selection point beyond it?  Because it might have ended in a BR
+        // that is not visible.  If so, the code above just placed selection
+        // inside that.  So I split it instead.
+        nsCOMPtr<nsIContent> linkContent = do_QueryInterface(link);
+        NS_ENSURE_STATE(linkContent || !link);
+        nsCOMPtr<nsIContent> selContent = do_QueryInterface(selNode);
+        NS_ENSURE_STATE(selContent || !selNode);
+        nsCOMPtr<nsIContent> leftLink;
+        SplitNodeDeep(*linkContent, *selContent, selOffset,
+                      EmptyContainers::no, getter_AddRefs(leftLink));
+        if (leftLink) {
+          selNode = GetNodeLocation(GetAsDOMNode(leftLink), &selOffset);
+          selection->Collapse(selNode, selOffset+1);
+        }
+      }
+    }
+  }
+
+  return rules->DidDoAction(selection, &ruleInfo, rv);
+}
+
+NS_IMETHODIMP
+HTMLEditor::AddInsertionListener(nsIContentFilter* aListener)
+{
+  NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
+
+  // don't let a listener be added more than once
+  if (!mContentFilters.Contains(aListener)) {
+    mContentFilters.AppendElement(*aListener);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLEditor::RemoveInsertionListener(nsIContentFilter* aListener)
+{
+  NS_ENSURE_TRUE(aListener, NS_ERROR_FAILURE);
+
+  mContentFilters.RemoveElement(aListener);
+
+  return NS_OK;
+}
+
+nsresult
+HTMLEditor::DoContentFilterCallback(const nsAString& aFlavor,
+                                    nsIDOMDocument* sourceDoc,
+                                    bool aWillDeleteSelection,
+                                    nsIDOMNode** aFragmentAsNode,
+                                    nsIDOMNode** aFragStartNode,
+                                    int32_t* aFragStartOffset,
+                                    nsIDOMNode** aFragEndNode,
+                                    int32_t* aFragEndOffset,
+                                    nsIDOMNode** aTargetNode,
+                                    int32_t* aTargetOffset,
+                                    bool* aDoContinue)
+{
+  *aDoContinue = true;
+
+  for (auto& listener : mContentFilters) {
+    if (!*aDoContinue) {
+      break;
+    }
+    listener->NotifyOfInsertion(aFlavor, nullptr, sourceDoc,
+                                aWillDeleteSelection, aFragmentAsNode,
+                                aFragStartNode, aFragStartOffset,
+                                aFragEndNode, aFragEndOffset, aTargetNode,
+                                aTargetOffset, aDoContinue);
+  }
+
+  return NS_OK;
+}
+
+bool
+HTMLEditor::IsInLink(nsIDOMNode* aNode,
+                     nsCOMPtr<nsIDOMNode>* outLink)
+{
+  NS_ENSURE_TRUE(aNode, false);
+  if (outLink) {
+    *outLink = nullptr;
+  }
+  nsCOMPtr<nsIDOMNode> tmp, node = aNode;
+  while (node) {
+    if (HTMLEditUtils::IsLink(node)) {
+      if (outLink) {
+        *outLink = node;
+      }
+      return true;
+    }
+    tmp = node;
+    tmp->GetParentNode(getter_AddRefs(node));
+  }
+  return false;
+}
+
+nsresult
+HTMLEditor::StripFormattingNodes(nsIContent& aNode,
+                                 bool aListOnly)
+{
+  if (aNode.TextIsOnlyWhitespace()) {
+    nsCOMPtr<nsINode> parent = aNode.GetParentNode();
+    if (parent) {
+      if (!aListOnly || HTMLEditUtils::IsList(parent)) {
+        ErrorResult rv;
+        parent->RemoveChild(aNode, rv);
+        return rv.StealNSResult();
+      }
+      return NS_OK;
+    }
+  }
+
+  if (!aNode.IsHTMLElement(nsGkAtoms::pre)) {
+    nsCOMPtr<nsIContent> child = aNode.GetLastChild();
+    while (child) {
+      nsCOMPtr<nsIContent> previous = child->GetPreviousSibling();
+      nsresult rv = StripFormattingNodes(*child, aListOnly);
+      NS_ENSURE_SUCCESS(rv, rv);
+      child = previous.forget();
+    }
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLEditor::PrepareTransferable(nsITransferable** aTransferable)
+{
+  return NS_OK;
+}
+
+nsresult
+HTMLEditor::PrepareHTMLTransferable(nsITransferable** aTransferable)
+{
+  // Create generic Transferable for getting the data
+  nsresult rv = CallCreateInstance("@mozilla.org/widget/transferable;1", aTransferable);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Get the nsITransferable interface for getting the data from the clipboard
+  if (aTransferable) {
+    nsCOMPtr<nsIDocument> destdoc = GetDocument();
+    nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr;
+    (*aTransferable)->Init(loadContext);
+
+    // Create the desired DataFlavor for the type of data
+    // we want to get out of the transferable
+    // This should only happen in html editors, not plaintext
+    if (!IsPlaintextEditor()) {
+      (*aTransferable)->AddDataFlavor(kNativeHTMLMime);
+      (*aTransferable)->AddDataFlavor(kHTMLMime);
+      (*aTransferable)->AddDataFlavor(kFileMime);
+
+      switch (Preferences::GetInt("clipboard.paste_image_type", 1)) {
+        case 0:  // prefer JPEG over PNG over GIF encoding
+          (*aTransferable)->AddDataFlavor(kJPEGImageMime);
+          (*aTransferable)->AddDataFlavor(kJPGImageMime);
+          (*aTransferable)->AddDataFlavor(kPNGImageMime);
+          (*aTransferable)->AddDataFlavor(kGIFImageMime);
+          break;
+        case 1:  // prefer PNG over JPEG over GIF encoding (default)
+        default:
+          (*aTransferable)->AddDataFlavor(kPNGImageMime);
+          (*aTransferable)->AddDataFlavor(kJPEGImageMime);
+          (*aTransferable)->AddDataFlavor(kJPGImageMime);
+          (*aTransferable)->AddDataFlavor(kGIFImageMime);
+          break;
+        case 2:  // prefer GIF over JPEG over PNG encoding
+          (*aTransferable)->AddDataFlavor(kGIFImageMime);
+          (*aTransferable)->AddDataFlavor(kJPEGImageMime);
+          (*aTransferable)->AddDataFlavor(kJPGImageMime);
+          (*aTransferable)->AddDataFlavor(kPNGImageMime);
+          break;
+      }
+    }
+    (*aTransferable)->AddDataFlavor(kUnicodeMime);
+    (*aTransferable)->AddDataFlavor(kMozTextInternal);
+  }
+
+  return NS_OK;
+}
+
+bool
+FindIntegerAfterString(const char* aLeadingString,
+                       nsCString& aCStr,
+                       int32_t& foundNumber)
+{
+  // first obtain offsets from cfhtml str
+  int32_t numFront = aCStr.Find(aLeadingString);
+  if (numFront == -1) {
+    return false;
+  }
+  numFront += strlen(aLeadingString);
+
+  int32_t numBack = aCStr.FindCharInSet(CRLF, numFront);
+  if (numBack == -1) {
+    return false;
+  }
+
+  nsAutoCString numStr(Substring(aCStr, numFront, numBack-numFront));
+  nsresult errorCode;
+  foundNumber = numStr.ToInteger(&errorCode);
+  return true;
+}
+
+nsresult
+RemoveFragComments(nsCString& aStr)
+{
+  // remove the StartFragment/EndFragment comments from the str, if present
+  int32_t startCommentIndx = aStr.Find("<!--StartFragment");
+  if (startCommentIndx >= 0) {
+    int32_t startCommentEnd = aStr.Find("-->", false, startCommentIndx);
+    if (startCommentEnd > startCommentIndx) {
+      aStr.Cut(startCommentIndx, (startCommentEnd + 3) - startCommentIndx);
+    }
+  }
+  int32_t endCommentIndx = aStr.Find("<!--EndFragment");
+  if (endCommentIndx >= 0) {
+    int32_t endCommentEnd = aStr.Find("-->", false, endCommentIndx);
+    if (endCommentEnd > endCommentIndx) {
+      aStr.Cut(endCommentIndx, (endCommentEnd + 3) - endCommentIndx);
+    }
+  }
+  return NS_OK;
+}
+
+nsresult
+HTMLEditor::ParseCFHTML(nsCString& aCfhtml,
+                        char16_t** aStuffToPaste,
+                        char16_t** aCfcontext)
+{
+  // First obtain offsets from cfhtml str.
+  int32_t startHTML, endHTML, startFragment, endFragment;
+  if (!FindIntegerAfterString("StartHTML:", aCfhtml, startHTML) ||
+      startHTML < -1) {
+    return NS_ERROR_FAILURE;
+  }
+  if (!FindIntegerAfterString("EndHTML:", aCfhtml, endHTML) ||
+      endHTML < -1) {
+    return NS_ERROR_FAILURE;
+  }
+  if (!FindIntegerAfterString("StartFragment:", aCfhtml, startFragment) ||
+      startFragment < 0) {
+    return NS_ERROR_FAILURE;
+  }
+  if (!FindIntegerAfterString("EndFragment:", aCfhtml, endFragment) ||
+      startFragment < 0) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // The StartHTML and EndHTML markers are allowed to be -1 to include everything.
+  //   See Reference: MSDN doc entitled "HTML Clipboard Format"
+  //   http://msdn.microsoft.com/en-us/library/aa767917(VS.85).aspx#unknown_854
+  if (startHTML == -1) {
+    startHTML = aCfhtml.Find("<!--StartFragment-->");
+    if (startHTML == -1) {
+      return NS_OK;
+    }
+  }
+  if (endHTML == -1) {
+    const char endFragmentMarker[] = "<!--EndFragment-->";
+    endHTML = aCfhtml.Find(endFragmentMarker);
+    if (endHTML == -1) {
+      return NS_OK;
+    }
+    endHTML += ArrayLength(endFragmentMarker) - 1;
+  }
+
+  // create context string
+  nsAutoCString contextUTF8(Substring(aCfhtml, startHTML, startFragment - startHTML) +
+                            NS_LITERAL_CSTRING("<!--" kInsertCookie "-->") +
+                            Substring(aCfhtml, endFragment, endHTML - endFragment));
+
+  // validate startFragment
+  // make sure it's not in the middle of a HTML tag
+  // see bug #228879 for more details
+  int32_t curPos = startFragment;
+  while (curPos > startHTML) {
+    if (aCfhtml[curPos] == '>') {
+      // working backwards, the first thing we see is the end of a tag
+      // so StartFragment is good, so do nothing.
+      break;
+    }
+    if (aCfhtml[curPos] == '<') {
+      // if we are at the start, then we want to see the '<'
+      if (curPos != startFragment) {
+        // working backwards, the first thing we see is the start of a tag
+        // so StartFragment is bad, so we need to update it.
+        NS_ERROR("StartFragment byte count in the clipboard looks bad, see bug #228879");
+        startFragment = curPos - 1;
+      }
+      break;
+    }
+    curPos--;
+  }
+
+  // create fragment string
+  nsAutoCString fragmentUTF8(Substring(aCfhtml, startFragment, endFragment-startFragment));
+
+  // remove the StartFragment/EndFragment comments from the fragment, if present
+  RemoveFragComments(fragmentUTF8);
+
+  // remove the StartFragment/EndFragment comments from the context, if present
+  RemoveFragComments(contextUTF8);
+
+  // convert both strings to usc2
+  const nsAFlatString& fragUcs2Str = NS_ConvertUTF8toUTF16(fragmentUTF8);
+  const nsAFlatString& cntxtUcs2Str = NS_ConvertUTF8toUTF16(contextUTF8);
+
+  // translate platform linebreaks for fragment
+  int32_t oldLengthInChars = fragUcs2Str.Length() + 1;  // +1 to include null terminator
+  int32_t newLengthInChars = 0;
+  *aStuffToPaste = nsLinebreakConverter::ConvertUnicharLineBreaks(fragUcs2Str.get(),
+                                                           nsLinebreakConverter::eLinebreakAny,
+                                                           nsLinebreakConverter::eLinebreakContent,
+                                                           oldLengthInChars, &newLengthInChars);
+  NS_ENSURE_TRUE(*aStuffToPaste, NS_ERROR_FAILURE);
+
+  // translate platform linebreaks for context
+  oldLengthInChars = cntxtUcs2Str.Length() + 1;  // +1 to include null terminator
+  newLengthInChars = 0;
+  *aCfcontext = nsLinebreakConverter::ConvertUnicharLineBreaks(cntxtUcs2Str.get(),
+                                                           nsLinebreakConverter::eLinebreakAny,
+                                                           nsLinebreakConverter::eLinebreakContent,
+                                                           oldLengthInChars, &newLengthInChars);
+  // it's ok for context to be empty.  frag might be whole doc and contain all its context.
+
+  // we're done!
+  return NS_OK;
+}
+
+static nsresult
+ImgFromData(const nsACString& aType, const nsACString& aData, nsString& aOutput)
+{
+  nsAutoCString data64;
+  nsresult rv = Base64Encode(aData, data64);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  aOutput.AssignLiteral("<IMG src=\"data:");
+  AppendUTF8toUTF16(aType, aOutput);
+  aOutput.AppendLiteral(";base64,");
+  if (!AppendASCIItoUTF16(data64, aOutput, fallible_t())) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  aOutput.AppendLiteral("\" alt=\"\" >");
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(HTMLEditor::BlobReader, nsIEditorBlobListener)
+
+HTMLEditor::BlobReader::BlobReader(BlobImpl* aBlob,
+                                   HTMLEditor* aHTMLEditor,
+                                   bool aIsSafe,
+                                   nsIDOMDocument* aSourceDoc,
+                                   nsIDOMNode* aDestinationNode,
+                                   int32_t aDestOffset,
+                                   bool aDoDeleteSelection)
+  : mBlob(aBlob)
+  , mHTMLEditor(aHTMLEditor)
+  , mIsSafe(aIsSafe)
+  , mSourceDoc(aSourceDoc)
+  , mDestinationNode(aDestinationNode)
+  , mDestOffset(aDestOffset)
+  , mDoDeleteSelection(aDoDeleteSelection)
+{
+  MOZ_ASSERT(mBlob);
+  MOZ_ASSERT(mHTMLEditor);
+  MOZ_ASSERT(mDestinationNode);
+}
+
+NS_IMETHODIMP
+HTMLEditor::BlobReader::OnResult(const nsACString& aResult)
+{
+  nsString blobType;
+  mBlob->GetType(blobType);
+
+  NS_ConvertUTF16toUTF8 type(blobType);
+  nsAutoString stuffToPaste;
+  nsresult rv = ImgFromData(type, aResult, stuffToPaste);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  AutoEditBatch beginBatching(mHTMLEditor);
+  rv = mHTMLEditor->DoInsertHTMLWithContext(stuffToPaste, EmptyString(),
+                                            EmptyString(),
+                                            NS_LITERAL_STRING(kFileMime),
+                                            mSourceDoc,
+                                            mDestinationNode, mDestOffset,
+                                            mDoDeleteSelection,
+                                            mIsSafe, false);
+  return rv;
+}
+
+NS_IMETHODIMP
+HTMLEditor::BlobReader::OnError(const nsAString& aError)
+{
+  nsCOMPtr<nsINode> destNode = do_QueryInterface(mDestinationNode);
+  const nsPromiseFlatString& flat = PromiseFlatString(aError);
+  const char16_t* error = flat.get();
+  nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
+                                  NS_LITERAL_CSTRING("Editor"),
+                                  destNode->OwnerDoc(),
+                                  nsContentUtils::eDOM_PROPERTIES,
+                                  "EditorFileDropFailed",
+                                  &error, 1);
+  return NS_OK;
+}
+
+nsresult
+HTMLEditor::InsertObject(const nsACString& aType,
+                         nsISupports* aObject,
+                         bool aIsSafe,
+                         nsIDOMDocument* aSourceDoc,
+                         nsIDOMNode* aDestinationNode,
+                         int32_t aDestOffset,
+                         bool aDoDeleteSelection)
+{
+  nsresult rv;
+
+  if (nsCOMPtr<BlobImpl> blob = do_QueryInterface(aObject)) {
+    RefPtr<BlobReader> br = new BlobReader(blob, this, aIsSafe, aSourceDoc,
+                                           aDestinationNode, aDestOffset,
+                                           aDoDeleteSelection);
+    nsCOMPtr<nsIEditorUtils> utils =
+      do_GetService("@mozilla.org/editor-utils;1");
+    NS_ENSURE_TRUE(utils, NS_ERROR_FAILURE);
+
+    nsCOMPtr<nsINode> node = do_QueryInterface(aDestinationNode);
+    MOZ_ASSERT(node);
+
+    nsCOMPtr<nsIDOMBlob> domBlob = Blob::Create(node->GetOwnerGlobal(), blob);
+    NS_ENSURE_TRUE(domBlob, NS_ERROR_FAILURE);
+
+    return utils->SlurpBlob(domBlob, node->OwnerDoc()->GetWindow(), br);
+  }
+
+  nsAutoCString type(aType);
+
+  // Check to see if we can insert an image file
+  bool insertAsImage = false;
+  nsCOMPtr<nsIFile> fileObj;
+  if (type.EqualsLiteral(kFileMime)) {
+    fileObj = do_QueryInterface(aObject);
+    if (fileObj) {
+      // Accept any image type fed to us
+      if (nsContentUtils::IsFileImage(fileObj, type)) {
+        insertAsImage = true;
+      } else {
+        // Reset type.
+        type.AssignLiteral(kFileMime);
+      }
+    }
+  }
+
+  if (type.EqualsLiteral(kJPEGImageMime) ||
+      type.EqualsLiteral(kJPGImageMime) ||
+      type.EqualsLiteral(kPNGImageMime) ||
+      type.EqualsLiteral(kGIFImageMime) ||
+      insertAsImage) {
+    nsCString imageData;
+    if (insertAsImage) {
+      rv = nsContentUtils::SlurpFileToString(fileObj, imageData);
+      NS_ENSURE_SUCCESS(rv, rv);
+    } else {
+      nsCOMPtr<nsIInputStream> imageStream = do_QueryInterface(aObject);
+      NS_ENSURE_TRUE(imageStream, NS_ERROR_FAILURE);
+
+      rv = NS_ConsumeStream(imageStream, UINT32_MAX, imageData);
+      NS_ENSURE_SUCCESS(rv, rv);
+
+      rv = imageStream->Close();
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    nsAutoString stuffToPaste;
+    rv = ImgFromData(type, imageData, stuffToPaste);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    AutoEditBatch beginBatching(this);
+    rv = DoInsertHTMLWithContext(stuffToPaste, EmptyString(), EmptyString(),
+                                 NS_LITERAL_STRING(kFileMime),
+                                 aSourceDoc,
+                                 aDestinationNode, aDestOffset,
+                                 aDoDeleteSelection,
+                                 aIsSafe, false);
+  }
+
+  return NS_OK;
+}
+
+nsresult
+HTMLEditor::InsertFromTransferable(nsITransferable* transferable,
+                                   nsIDOMDocument* aSourceDoc,
+                                   const nsAString& aContextStr,
+                                   const nsAString& aInfoStr,
+                                   bool havePrivateHTMLFlavor,
+                                   nsIDOMNode* aDestinationNode,
+                                   int32_t aDestOffset,
+                                   bool aDoDeleteSelection)
+{
+  nsresult rv = NS_OK;
+  nsAutoCString bestFlavor;
+  nsCOMPtr<nsISupports> genericDataObj;
+  uint32_t len = 0;
+  if (NS_SUCCEEDED(
+        transferable->GetAnyTransferData(bestFlavor,
+                                         getter_AddRefs(genericDataObj),
+                                         &len))) {
+    AutoTransactionsConserveSelection dontSpazMySelection(this);
+    nsAutoString flavor;
+    flavor.AssignWithConversion(bestFlavor);
+    nsAutoString stuffToPaste;
+    bool isSafe = IsSafeToInsertData(aSourceDoc);
+
+    if (bestFlavor.EqualsLiteral(kFileMime) ||
+        bestFlavor.EqualsLiteral(kJPEGImageMime) ||
+        bestFlavor.EqualsLiteral(kJPGImageMime) ||
+        bestFlavor.EqualsLiteral(kPNGImageMime) ||
+        bestFlavor.EqualsLiteral(kGIFImageMime)) {
+      rv = InsertObject(bestFlavor, genericDataObj, isSafe,
+                        aSourceDoc, aDestinationNode, aDestOffset, aDoDeleteSelection);
+    } else if (bestFlavor.EqualsLiteral(kNativeHTMLMime)) {
+      // note cf_html uses utf8, hence use length = len, not len/2 as in flavors below
+      nsCOMPtr<nsISupportsCString> textDataObj = do_QueryInterface(genericDataObj);
+      if (textDataObj && len > 0) {
+        nsAutoCString cfhtml;
+        textDataObj->GetData(cfhtml);
+        NS_ASSERTION(cfhtml.Length() <= (len), "Invalid length!");
+        nsXPIDLString cfcontext, cffragment, cfselection; // cfselection left emtpy for now
+
+        rv = ParseCFHTML(cfhtml, getter_Copies(cffragment), getter_Copies(cfcontext));
+        if (NS_SUCCEEDED(rv) && !cffragment.IsEmpty()) {
+          AutoEditBatch beginBatching(this);
+          // If we have our private HTML flavor, we will only use the fragment
+          // from the CF_HTML. The rest comes from the clipboard.
+          if (havePrivateHTMLFlavor) {
+            rv = DoInsertHTMLWithContext(cffragment,
+                                         aContextStr, aInfoStr, flavor,
+                                         aSourceDoc,
+                                         aDestinationNode, aDestOffset,
+                                         aDoDeleteSelection,
+                                         isSafe);
+          } else {
+            rv = DoInsertHTMLWithContext(cffragment,
+                                         cfcontext, cfselection, flavor,
+                                         aSourceDoc,
+                                         aDestinationNode, aDestOffset,
+                                         aDoDeleteSelection,
+                                         isSafe);
+
+          }
+        } else {
+          // In some platforms (like Linux), the clipboard might return data
+          // requested for unknown flavors (for example:
+          // application/x-moz-nativehtml).  In this case, treat the data
+          // to be pasted as mere HTML to get the best chance of pasting it
+          // correctly.
+          bestFlavor.AssignLiteral(kHTMLMime);
+          // Fall through the next case
+        }
+      }
+    }
+    if (bestFlavor.EqualsLiteral(kHTMLMime) ||
+        bestFlavor.EqualsLiteral(kUnicodeMime) ||
+        bestFlavor.EqualsLiteral(kMozTextInternal)) {
+      nsCOMPtr<nsISupportsString> textDataObj = do_QueryInterface(genericDataObj);
+      if (textDataObj && len > 0) {
+        nsAutoString text;
+        textDataObj->GetData(text);
+        NS_ASSERTION(text.Length() <= (len/2), "Invalid length!");
+        stuffToPaste.Assign(text.get(), len / 2);
+      } else {
+        nsCOMPtr<nsISupportsCString> textDataObj(do_QueryInterface(genericDataObj));
+        if (textDataObj && len > 0) {
+          nsAutoCString text;
+          textDataObj->GetData(text);
+          NS_ASSERTION(text.Length() <= len, "Invalid length!");
+          stuffToPaste.Assign(NS_ConvertUTF8toUTF16(Substring(text, 0, len)));
+        }
+      }
+
+      if (!stuffToPaste.IsEmpty()) {
+        AutoEditBatch beginBatching(this);
+        if (bestFlavor.EqualsLiteral(kHTMLMime)) {
+          rv = DoInsertHTMLWithContext(stuffToPaste,
+                                       aContextStr, aInfoStr, flavor,
+                                       aSourceDoc,
+                                       aDestinationNode, aDestOffset,
+                                       aDoDeleteSelection,
+                                       isSafe);
+        } else {
+          rv = InsertTextAt(stuffToPaste, aDestinationNode, aDestOffset, aDoDeleteSelection);
+        }
+      }
+    }
+  }
+
+  // Try to scroll the selection into view if the paste succeeded
+  if (NS_SUCCEEDED(rv)) {
+    ScrollSelectionIntoView(false);
+  }
+  return rv;
+}
+
+static void
+GetStringFromDataTransfer(nsIDOMDataTransfer* aDataTransfer,
+                          const nsAString& aType,
+                          int32_t aIndex,
+                          nsAString& aOutputString)
+{
+  nsCOMPtr<nsIVariant> variant;
+  DataTransfer::Cast(aDataTransfer)->GetDataAtNoSecurityCheck(aType, aIndex, getter_AddRefs(variant));
+  if (variant) {
+    variant->GetAsAString(aOutputString);
+  }
+}
+
+nsresult
+HTMLEditor::InsertFromDataTransfer(DataTransfer* aDataTransfer,
+                                   int32_t aIndex,
+                                   nsIDOMDocument* aSourceDoc,
+                                   nsIDOMNode* aDestinationNode,
+                                   int32_t aDestOffset,
+                                   bool aDoDeleteSelection)
+{
+  ErrorResult rv;
+  RefPtr<DOMStringList> types = aDataTransfer->MozTypesAt(aIndex, rv);
+  if (rv.Failed()) {
+    return rv.StealNSResult();
+  }
+
+  bool hasPrivateHTMLFlavor = types->Contains(NS_LITERAL_STRING(kHTMLContext));
+
+  bool isText = IsPlaintextEditor();
+  bool isSafe = IsSafeToInsertData(aSourceDoc);
+
+  uint32_t length = types->Length();
+  for (uint32_t t = 0; t < length; t++) {
+    nsAutoString type;
+    types->Item(t, type);
+
+    if (!isText) {
+      if (type.EqualsLiteral(kFileMime) ||
+          type.EqualsLiteral(kJPEGImageMime) ||
+          type.EqualsLiteral(kJPGImageMime) ||
+          type.EqualsLiteral(kPNGImageMime) ||
+          type.EqualsLiteral(kGIFImageMime)) {
+        nsCOMPtr<nsIVariant> variant;
+        DataTransfer::Cast(aDataTransfer)->GetDataAtNoSecurityCheck(type, aIndex, getter_AddRefs(variant));
+        if (variant) {
+          nsCOMPtr<nsISupports> object;
+          variant->GetAsISupports(getter_AddRefs(object));
+          return InsertObject(NS_ConvertUTF16toUTF8(type), object, isSafe,
+                              aSourceDoc, aDestinationNode, aDestOffset, aDoDeleteSelection);
+        }
+      } else if (type.EqualsLiteral(kNativeHTMLMime)) {
+        // Windows only clipboard parsing.
+        nsAutoString text;
+        GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
+        NS_ConvertUTF16toUTF8 cfhtml(text);
+
+        nsXPIDLString cfcontext, cffragment, cfselection; // cfselection left emtpy for now
+
+        nsresult rv = ParseCFHTML(cfhtml, getter_Copies(cffragment), getter_Copies(cfcontext));
+        if (NS_SUCCEEDED(rv) && !cffragment.IsEmpty()) {
+          AutoEditBatch beginBatching(this);
+
+          if (hasPrivateHTMLFlavor) {
+            // If we have our private HTML flavor, we will only use the fragment
+            // from the CF_HTML. The rest comes from the clipboard.
+            nsAutoString contextString, infoString;
+            GetStringFromDataTransfer(aDataTransfer, NS_LITERAL_STRING(kHTMLContext), aIndex, contextString);
+            GetStringFromDataTransfer(aDataTransfer, NS_LITERAL_STRING(kHTMLInfo), aIndex, infoString);
+            return DoInsertHTMLWithContext(cffragment,
+                                           contextString, infoString, type,
+                                           aSourceDoc,
+                                           aDestinationNode, aDestOffset,
+                                           aDoDeleteSelection,
+                                           isSafe);
+          } else {
+            return DoInsertHTMLWithContext(cffragment,
+                                           cfcontext, cfselection, type,
+                                           aSourceDoc,
+                                           aDestinationNode, aDestOffset,
+                                           aDoDeleteSelection,
+                                           isSafe);
+          }
+        }
+      } else if (type.EqualsLiteral(kHTMLMime)) {
+        nsAutoString text, contextString, infoString;
+        GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
+        GetStringFromDataTransfer(aDataTransfer, NS_LITERAL_STRING(kHTMLContext), aIndex, contextString);
+        GetStringFromDataTransfer(aDataTransfer, NS_LITERAL_STRING(kHTMLInfo), aIndex, infoString);
+
+        AutoEditBatch beginBatching(this);
+        if (type.EqualsLiteral(kHTMLMime)) {
+          return DoInsertHTMLWithContext(text,
+                                         contextString, infoString, type,
+                                         aSourceDoc,
+                                         aDestinationNode, aDestOffset,
+                                         aDoDeleteSelection,
+                                         isSafe);
+        }
+      }
+    }
+
+    if (type.EqualsLiteral(kTextMime) ||
+        type.EqualsLiteral(kMozTextInternal)) {
+      nsAutoString text;
+      GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
+
+      AutoEditBatch beginBatching(this);
+      return InsertTextAt(text, aDestinationNode, aDestOffset, aDoDeleteSelection);
+    }
+  }
+
+  return NS_OK;
+}
+
+bool
+HTMLEditor::HavePrivateHTMLFlavor(nsIClipboard* aClipboard)
+{
+  // check the clipboard for our special kHTMLContext flavor.  If that is there, we know
+  // we have our own internal html format on clipboard.
+
+  NS_ENSURE_TRUE(aClipboard, false);
+  bool bHavePrivateHTMLFlavor = false;
+
+  const char* flavArray[] = { kHTMLContext };
+
+  if (NS_SUCCEEDED(
+        aClipboard->HasDataMatchingFlavors(flavArray,
+                                           ArrayLength(flavArray),
+                                           nsIClipboard::kGlobalClipboard,
+                                           &bHavePrivateHTMLFlavor))) {
+    return bHavePrivateHTMLFlavor;
+  }
+
+  return false;
+}
+
+
+NS_IMETHODIMP
+HTMLEditor::Paste(int32_t aSelectionType)
+{
+  if (!FireClipboardEvent(ePaste, aSelectionType)) {
+    return NS_OK;
+  }
+
+  // Get Clipboard Service
+  nsresult rv;
+  nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Get the nsITransferable interface for getting the data from the clipboard
+  nsCOMPtr<nsITransferable> trans;
+  rv = PrepareHTMLTransferable(getter_AddRefs(trans));
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(trans, NS_ERROR_FAILURE);
+  // Get the Data from the clipboard
+  rv = clipboard->GetData(trans, aSelectionType);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (!IsModifiable()) {
+    return NS_OK;
+  }
+
+  // also get additional html copy hints, if present
+  nsAutoString contextStr, infoStr;
+
+  // If we have our internal html flavor on the clipboard, there is special
+  // context to use instead of cfhtml context.
+  bool bHavePrivateHTMLFlavor = HavePrivateHTMLFlavor(clipboard);
+  if (bHavePrivateHTMLFlavor) {
+    nsCOMPtr<nsISupports> contextDataObj, infoDataObj;
+    uint32_t contextLen, infoLen;
+    nsCOMPtr<nsISupportsString> textDataObj;
+
+    nsCOMPtr<nsITransferable> contextTrans =
+                  do_CreateInstance("@mozilla.org/widget/transferable;1");
+    NS_ENSURE_TRUE(contextTrans, NS_ERROR_NULL_POINTER);
+    contextTrans->Init(nullptr);
+    contextTrans->AddDataFlavor(kHTMLContext);
+    clipboard->GetData(contextTrans, aSelectionType);
+    contextTrans->GetTransferData(kHTMLContext, getter_AddRefs(contextDataObj), &contextLen);
+
+    nsCOMPtr<nsITransferable> infoTrans =
+                  do_CreateInstance("@mozilla.org/widget/transferable;1");
+    NS_ENSURE_TRUE(infoTrans, NS_ERROR_NULL_POINTER);
+    infoTrans->Init(nullptr);
+    infoTrans->AddDataFlavor(kHTMLInfo);
+    clipboard->GetData(infoTrans, aSelectionType);
+    infoTrans->GetTransferData(kHTMLInfo, getter_AddRefs(infoDataObj), &infoLen);
+
+    if (contextDataObj) {
+      nsAutoString text;
+      textDataObj = do_QueryInterface(contextDataObj);
+      textDataObj->GetData(text);
+      NS_ASSERTION(text.Length() <= (contextLen/2), "Invalid length!");
+      contextStr.Assign(text.get(), contextLen / 2);
+    }
+
+    if (infoDataObj) {
+      nsAutoString text;
+      textDataObj = do_QueryInterface(infoDataObj);
+      textDataObj->GetData(text);
+      NS_ASSERTION(text.Length() <= (infoLen/2), "Invalid length!");
+      infoStr.Assign(text.get(), infoLen / 2);
+    }
+  }
+
+  // handle transferable hooks
+  nsCOMPtr<nsIDOMDocument> domdoc;
+  GetDocument(getter_AddRefs(domdoc));
+  if (!EditorHookUtils::DoInsertionHook(domdoc, nullptr, trans)) {
+    return NS_OK;
+  }
+
+  return InsertFromTransferable(trans, nullptr, contextStr, infoStr, bHavePrivateHTMLFlavor,
+                                nullptr, 0, true);
+}
+
+NS_IMETHODIMP
+HTMLEditor::PasteTransferable(nsITransferable* aTransferable)
+{
+  // Use an invalid value for the clipboard type as data comes from aTransferable
+  // and we don't currently implement a way to put that in the data transfer yet.
+  if (!FireClipboardEvent(ePaste, nsIClipboard::kGlobalClipboard)) {
+    return NS_OK;
+  }
+
+  // handle transferable hooks
+  nsCOMPtr<nsIDOMDocument> domdoc = GetDOMDocument();
+  if (!EditorHookUtils::DoInsertionHook(domdoc, nullptr, aTransferable)) {
+    return NS_OK;
+  }
+
+  nsAutoString contextStr, infoStr;
+  return InsertFromTransferable(aTransferable, nullptr, contextStr, infoStr, false,
+                                nullptr, 0, true);
+}
+
+/**
+ * HTML PasteNoFormatting. Ignore any HTML styles and formating in paste source.
+ */
+NS_IMETHODIMP
+HTMLEditor::PasteNoFormatting(int32_t aSelectionType)
+{
+  if (!FireClipboardEvent(ePaste, aSelectionType)) {
+    return NS_OK;
+  }
+
+  ForceCompositionEnd();
+
+  // Get Clipboard Service
+  nsresult rv;
+  nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Get the nsITransferable interface for getting the data from the clipboard.
+  // use TextEditor::PrepareTransferable() to force unicode plaintext data.
+  nsCOMPtr<nsITransferable> trans;
+  rv = TextEditor::PrepareTransferable(getter_AddRefs(trans));
+  if (NS_SUCCEEDED(rv) && trans) {
+    // Get the Data from the clipboard
+    if (NS_SUCCEEDED(clipboard->GetData(trans, aSelectionType)) &&
+        IsModifiable()) {
+      const nsAFlatString& empty = EmptyString();
+      rv = InsertFromTransferable(trans, nullptr, empty, empty, false, nullptr, 0,
+                                  true);
+    }
+  }
+
+  return rv;
+}
+
+// The following arrays contain the MIME types that we can paste. The arrays
+// are used by CanPaste() and CanPasteTransferable() below.
+
+static const char* textEditorFlavors[] = { kUnicodeMime };
+static const char* textHtmlEditorFlavors[] = { kUnicodeMime, kHTMLMime,
+                                               kJPEGImageMime, kJPGImageMime,
+                                               kPNGImageMime, kGIFImageMime };
+
+NS_IMETHODIMP
+HTMLEditor::CanPaste(int32_t aSelectionType,
+                     bool* aCanPaste)
+{
+  NS_ENSURE_ARG_POINTER(aCanPaste);
+  *aCanPaste = false;
+
+  // can't paste if readonly
+  if (!IsModifiable()) {
+    return NS_OK;
+  }
+
+  nsresult rv;
+  nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  bool haveFlavors;
+
+  // Use the flavors depending on the current editor mask
+  if (IsPlaintextEditor()) {
+    rv = clipboard->HasDataMatchingFlavors(textEditorFlavors,
+                                           ArrayLength(textEditorFlavors),
+                                           aSelectionType, &haveFlavors);
+  } else {
+    rv = clipboard->HasDataMatchingFlavors(textHtmlEditorFlavors,
+                                           ArrayLength(textHtmlEditorFlavors),
+                                           aSelectionType, &haveFlavors);
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  *aCanPaste = haveFlavors;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLEditor::CanPasteTransferable(nsITransferable* aTransferable,
+                                 bool* aCanPaste)
+{
+  NS_ENSURE_ARG_POINTER(aCanPaste);
+
+  // can't paste if readonly
+  if (!IsModifiable()) {
+    *aCanPaste = false;
+    return NS_OK;
+  }
+
+  // If |aTransferable| is null, assume that a paste will succeed.
+  if (!aTransferable) {
+    *aCanPaste = true;
+    return NS_OK;
+  }
+
+  // Peek in |aTransferable| to see if it contains a supported MIME type.
+
+  // Use the flavors depending on the current editor mask
+  const char ** flavors;
+  unsigned length;
+  if (IsPlaintextEditor()) {
+    flavors = textEditorFlavors;
+    length = ArrayLength(textEditorFlavors);
+  } else {
+    flavors = textHtmlEditorFlavors;
+    length = ArrayLength(textHtmlEditorFlavors);
+  }
+
+  for (unsigned int i = 0; i < length; i++, flavors++) {
+    nsCOMPtr<nsISupports> data;
+    uint32_t dataLen;
+    nsresult rv = aTransferable->GetTransferData(*flavors,
+                                                 getter_AddRefs(data),
+                                                 &dataLen);
+    if (NS_SUCCEEDED(rv) && data) {
+      *aCanPaste = true;
+      return NS_OK;
+    }
+  }
+
+  *aCanPaste = false;
+  return NS_OK;
+}
+
+/**
+ * HTML PasteAsQuotation: Paste in a blockquote type=cite.
+ */
+NS_IMETHODIMP
+HTMLEditor::PasteAsQuotation(int32_t aSelectionType)
+{
+  if (IsPlaintextEditor()) {
+    return PasteAsPlaintextQuotation(aSelectionType);
+  }
+
+  nsAutoString citation;
+  return PasteAsCitedQuotation(citation, aSelectionType);
+}
+
+NS_IMETHODIMP
+HTMLEditor::PasteAsCitedQuotation(const nsAString& aCitation,
+                                  int32_t aSelectionType)
+{
+  AutoEditBatch beginBatching(this);
+  AutoRules beginRulesSniffing(this, EditAction::insertQuotation,
+                               nsIEditor::eNext);
+
+  // get selection
+  RefPtr<Selection> selection = GetSelection();
+  NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
+
+  // give rules a chance to handle or cancel
+  TextRulesInfo ruleInfo(EditAction::insertElement);
+  bool cancel, handled;
+  // Protect the edit rules object from dying
+  nsCOMPtr<nsIEditRules> rules(mRules);
+  nsresult rv = rules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (cancel || handled) {
+    return NS_OK; // rules canceled the operation
+  }
+
+  nsCOMPtr<Element> newNode =
+    DeleteSelectionAndCreateElement(*nsGkAtoms::blockquote);
+  NS_ENSURE_TRUE(newNode, NS_ERROR_NULL_POINTER);
+
+  // Try to set type=cite.  Ignore it if this fails.
+  newNode->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
+                   NS_LITERAL_STRING("cite"), true);
+
+  // Set the selection to the underneath the node we just inserted:
+  rv = selection->Collapse(newNode, 0);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Ensure that the inserted <blockquote> has a frame to make it IsEditable.
+  FlushFrames();
+
+  return Paste(aSelectionType);
+}
+
+/**
+ * Paste a plaintext quotation.
+ */
+NS_IMETHODIMP
+HTMLEditor::PasteAsPlaintextQuotation(int32_t aSelectionType)
+{
+  // Get Clipboard Service
+  nsresult rv;
+  nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Create generic Transferable for getting the data
+  nsCOMPtr<nsITransferable> trans =
+                 do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(trans, NS_ERROR_FAILURE);
+
+  nsCOMPtr<nsIDocument> destdoc = GetDocument();
+  nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr;
+  trans->Init(loadContext);
+
+  // We only handle plaintext pastes here
+  trans->AddDataFlavor(kUnicodeMime);
+
+  // Get the Data from the clipboard
+  clipboard->GetData(trans, aSelectionType);
+
+  // Now we ask the transferable for the data
+  // it still owns the data, we just have a pointer to it.
+  // If it can't support a "text" output of the data the call will fail
+  nsCOMPtr<nsISupports> genericDataObj;
+  uint32_t len = 0;
+  nsAutoCString flav;
+  rv = trans->GetAnyTransferData(flav, getter_AddRefs(genericDataObj), &len);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (flav.EqualsLiteral(kUnicodeMime)) {
+    nsCOMPtr<nsISupportsString> textDataObj = do_QueryInterface(genericDataObj);
+    if (textDataObj && len > 0) {
+      nsAutoString stuffToPaste;
+      textDataObj->GetData(stuffToPaste);
+      NS_ASSERTION(stuffToPaste.Length() <= (len/2), "Invalid length!");
+      AutoEditBatch beginBatching(this);
+      rv = InsertAsPlaintextQuotation(stuffToPaste, true, 0);
+    }
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+HTMLEditor::InsertTextWithQuotations(const nsAString& aStringToInsert)
+{
+  AutoEditBatch beginBatching(this);
+  // The whole operation should be undoable in one transaction:
+  BeginTransaction();
+
+  // We're going to loop over the string, collecting up a "hunk"
+  // that's all the same type (quoted or not),
+  // Whenever the quotedness changes (or we reach the string's end)
+  // we will insert the hunk all at once, quoted or non.
+
+  static const char16_t cite('>');
+  bool curHunkIsQuoted = (aStringToInsert.First() == cite);
+
+  nsAString::const_iterator hunkStart, strEnd;
+  aStringToInsert.BeginReading(hunkStart);
+  aStringToInsert.EndReading(strEnd);
+
+  // In the loop below, we only look for DOM newlines (\n),
+  // because we don't have a FindChars method that can look
+  // for both \r and \n.  \r is illegal in the dom anyway,
+  // but in debug builds, let's take the time to verify that
+  // there aren't any there:
+#ifdef DEBUG
+  nsAString::const_iterator dbgStart (hunkStart);
+  if (FindCharInReadable('\r', dbgStart, strEnd)) {
+    NS_ASSERTION(false,
+            "Return characters in DOM! InsertTextWithQuotations may be wrong");
+  }
+#endif /* DEBUG */
+
+  // Loop over lines:
+  nsresult rv = NS_OK;
+  nsAString::const_iterator lineStart (hunkStart);
+  // We will break from inside when we run out of newlines.
+  for (;;) {
+    // Search for the end of this line (dom newlines, see above):
+    bool found = FindCharInReadable('\n', lineStart, strEnd);
+    bool quoted = false;
+    if (found) {
+      // if there's another newline, lineStart now points there.
+      // Loop over any consecutive newline chars:
+      nsAString::const_iterator firstNewline (lineStart);
+      while (*lineStart == '\n') {
+        ++lineStart;
+      }
+      quoted = (*lineStart == cite);
+      if (quoted == curHunkIsQuoted) {
+        continue;
+      }
+      // else we're changing state, so we need to insert
+      // from curHunk to lineStart then loop around.
+
+      // But if the current hunk is quoted, then we want to make sure
+      // that any extra newlines on the end do not get included in
+      // the quoted section: blank lines flaking a quoted section
+      // should be considered unquoted, so that if the user clicks
+      // there and starts typing, the new text will be outside of
+      // the quoted block.
+      if (curHunkIsQuoted) {
+        lineStart = firstNewline;
+
+        // 'firstNewline' points to the first '\n'. We want to
+        // ensure that this first newline goes into the hunk
+        // since quoted hunks can be displayed as blocks
+        // (and the newline should become invisible in this case).
+        // So the next line needs to start at the next character.
+        lineStart++;
+      }
+    }
+
+    // If no newline found, lineStart is now strEnd and we can finish up,
+    // inserting from curHunk to lineStart then returning.
+    const nsAString &curHunk = Substring(hunkStart, lineStart);
+    nsCOMPtr<nsIDOMNode> dummyNode;
+    if (curHunkIsQuoted) {
+      rv = InsertAsPlaintextQuotation(curHunk, false,
+                                      getter_AddRefs(dummyNode));
+    } else {
+      rv = InsertText(curHunk);
+    }
+    if (!found) {
+      break;
+    }
+    curHunkIsQuoted = quoted;
+    hunkStart = lineStart;
+  }
+
+  EndTransaction();
+
+  return rv;
+}
+
+NS_IMETHODIMP
+HTMLEditor::InsertAsQuotation(const nsAString& aQuotedText,
+                              nsIDOMNode** aNodeInserted)
+{
+  if (IsPlaintextEditor()) {
+    return InsertAsPlaintextQuotation(aQuotedText, true, aNodeInserted);
+  }
+
+  nsAutoString citation;
+  return InsertAsCitedQuotation(aQuotedText, citation, false,
+                                aNodeInserted);
+}
+
+// Insert plaintext as a quotation, with cite marks (e.g. "> ").
+// This differs from its corresponding method in TextEditor
+// in that here, quoted material is enclosed in a <pre> tag
+// in order to preserve the original line wrapping.
+NS_IMETHODIMP
+HTMLEditor::InsertAsPlaintextQuotation(const nsAString& aQuotedText,
+                                       bool aAddCites,
+                                       nsIDOMNode** aNodeInserted)
+{
+  // get selection
+  RefPtr<Selection> selection = GetSelection();
+  NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
+
+  AutoEditBatch beginBatching(this);
+  AutoRules beginRulesSniffing(this, EditAction::insertQuotation,
+                               nsIEditor::eNext);
+
+  // give rules a chance to handle or cancel
+  TextRulesInfo ruleInfo(EditAction::insertElement);
+  bool cancel, handled;
+  // Protect the edit rules object from dying
+  nsCOMPtr<nsIEditRules> rules(mRules);
+  nsresult rv = rules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (cancel || handled) {
+    return NS_OK; // rules canceled the operation
+  }
+
+  // Wrap the inserted quote in a <span> so we can distinguish it. If we're
+  // inserting into the <body>, we use a <span> which is displayed as a block
+  // and sized to the screen using 98 viewport width units.
+  // We could use 100vw, but 98vw avoids a horizontal scroll bar where possible.
+  // All this is done to wrap overlong lines to the screen and not to the
+  // container element, the width-restricted body.
+  nsCOMPtr<Element> newNode =
+    DeleteSelectionAndCreateElement(*nsGkAtoms::span);
+
+  // If this succeeded, then set selection inside the pre
+  // so the inserted text will end up there.
+  // If it failed, we don't care what the return value was,
+  // but we'll fall through and try to insert the text anyway.
+  if (newNode) {
+    // Add an attribute on the pre node so we'll know it's a quotation.
+    newNode->SetAttr(kNameSpaceID_None, nsGkAtoms::mozquote,
+                     NS_LITERAL_STRING("true"), true);
+    // Allow wrapping on spans so long lines get wrapped to the screen.
+    nsCOMPtr<nsINode> parent = newNode->GetParentNode();
+    if (parent && parent->IsHTMLElement(nsGkAtoms::body)) {
+      newNode->SetAttr(kNameSpaceID_None, nsGkAtoms::style,
+        NS_LITERAL_STRING("white-space: pre-wrap; display: block; width: 98vw;"),
+        true);
+    } else {
+      newNode->SetAttr(kNameSpaceID_None, nsGkAtoms::style,
+        NS_LITERAL_STRING("white-space: pre-wrap;"), true);
+    }
+
+    // and set the selection inside it:
+    selection->Collapse(newNode, 0);
+  }
+
+  // Ensure that the inserted <span> has a frame to make it IsEditable.
+  FlushFrames();
+
+  if (aAddCites) {
+    rv = TextEditor::InsertAsQuotation(aQuotedText, aNodeInserted);
+  } else {
+    rv = TextEditor::InsertText(aQuotedText);
+  }
+  // Note that if !aAddCites, aNodeInserted isn't set.
+  // That's okay because the routines that use aAddCites
+  // don't need to know the inserted node.
+
+  if (aNodeInserted && NS_SUCCEEDED(rv)) {
+    *aNodeInserted = GetAsDOMNode(newNode);
+    NS_IF_ADDREF(*aNodeInserted);
+  }
+
+  // Set the selection to just after the inserted node:
+  if (NS_SUCCEEDED(rv) && newNode) {
+    nsCOMPtr<nsINode> parent = newNode->GetParentNode();
+    int32_t offset = parent ? parent->IndexOf(newNode) : -1;
+    if (parent) {
+      selection->Collapse(parent, offset + 1);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+HTMLEditor::StripCites()
+{
+  return TextEditor::StripCites();
+}
+
+NS_IMETHODIMP
+HTMLEditor::Rewrap(bool aRespectNewlines)
+{
+  return TextEditor::Rewrap(aRespectNewlines);
+}
+
+NS_IMETHODIMP
+HTMLEditor::InsertAsCitedQuotation(const nsAString& aQuotedText,
+                                   const nsAString& aCitation,
+                                   bool aInsertHTML,
+                                   nsIDOMNode** aNodeInserted)
+{
+  // Don't let anyone insert html into a "plaintext" editor:
+  if (IsPlaintextEditor()) {
+    NS_ASSERTION(!aInsertHTML, "InsertAsCitedQuotation: trying to insert html into plaintext editor");
+    return InsertAsPlaintextQuotation(aQuotedText, true, aNodeInserted);
+  }
+
+  // get selection
+  RefPtr<Selection> selection = GetSelection();
+  NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
+
+  AutoEditBatch beginBatching(this);
+  AutoRules beginRulesSniffing(this, EditAction::insertQuotation,
+                               nsIEditor::eNext);
+
+  // give rules a chance to handle or cancel
+  TextRulesInfo ruleInfo(EditAction::insertElement);
+  bool cancel, handled;
+  // Protect the edit rules object from dying
+  nsCOMPtr<nsIEditRules> rules(mRules);
+  nsresult rv = rules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (cancel || handled) {
+    return NS_OK; // rules canceled the operation
+  }
+
+  nsCOMPtr<Element> newNode =
+    DeleteSelectionAndCreateElement(*nsGkAtoms::blockquote);
+  NS_ENSURE_TRUE(newNode, NS_ERROR_NULL_POINTER);
+
+  // Try to set type=cite.  Ignore it if this fails.
+  newNode->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
+                   NS_LITERAL_STRING("cite"), true);
+
+  if (!aCitation.IsEmpty()) {
+    newNode->SetAttr(kNameSpaceID_None, nsGkAtoms::cite, aCitation, true);
+  }
+
+  // Set the selection inside the blockquote so aQuotedText will go there:
+  selection->Collapse(newNode, 0);
+
+  // Ensure that the inserted <blockquote> has a frame to make it IsEditable.
+  FlushFrames();
+
+  if (aInsertHTML) {
+    rv = LoadHTML(aQuotedText);
+  } else {
+    rv = InsertText(aQuotedText);  // XXX ignore charset
+  }
+
+  if (aNodeInserted && NS_SUCCEEDED(rv)) {
+    *aNodeInserted = GetAsDOMNode(newNode);
+    NS_IF_ADDREF(*aNodeInserted);
+  }
+
+  // Set the selection to just after the inserted node:
+  if (NS_SUCCEEDED(rv) && newNode) {
+    nsCOMPtr<nsINode> parent = newNode->GetParentNode();
+    int32_t offset = parent ? parent->IndexOf(newNode) : -1;
+    if (parent) {
+      selection->Collapse(parent, offset + 1);
+    }
+  }
+  return rv;
+}
+
+
+void RemoveBodyAndHead(nsINode& aNode)
+{
+  nsCOMPtr<nsIContent> body, head;
+  // find the body and head nodes if any.
+  // look only at immediate children of aNode.
+  for (nsCOMPtr<nsIContent> child = aNode.GetFirstChild();
+       child;
+       child = child->GetNextSibling()) {
+    if (child->IsHTMLElement(nsGkAtoms::body)) {
+      body = child;
+    } else if (child->IsHTMLElement(nsGkAtoms::head)) {
+      head = child;
+    }
+  }
+  if (head) {
+    ErrorResult ignored;
+    aNode.RemoveChild(*head, ignored);
+  }
+  if (body) {
+    nsCOMPtr<nsIContent> child = body->GetFirstChild();
+    while (child) {
+      ErrorResult ignored;
+      aNode.InsertBefore(*child, body, ignored);
+      child = body->GetFirstChild();
+    }
+
+    ErrorResult ignored;
+    aNode.RemoveChild(*body, ignored);
+  }
+}
+
+/**
+ * This function finds the target node that we will be pasting into. aStart is
+ * the context that we're given and aResult will be the target. Initially,
+ * *aResult must be nullptr.
+ *
+ * The target for a paste is found by either finding the node that contains
+ * the magical comment node containing kInsertCookie or, failing that, the
+ * firstChild of the firstChild (until we reach a leaf).
+ */
+nsresult FindTargetNode(nsIDOMNode *aStart, nsCOMPtr<nsIDOMNode> &aResult)
+{
+  NS_ENSURE_TRUE(aStart, NS_OK);
+
+  nsCOMPtr<nsIDOMNode> child, tmp;
+
+  nsresult rv = aStart->GetFirstChild(getter_AddRefs(child));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (!child) {
+    // If the current result is nullptr, then aStart is a leaf, and is the
+    // fallback result.
+    if (!aResult) {
+      aResult = aStart;
+    }
+    return NS_OK;
+  }
+
+  do {
+    // Is this child the magical cookie?
+    nsCOMPtr<nsIDOMComment> comment = do_QueryInterface(child);
+    if (comment) {
+      nsAutoString data;
+      rv = comment->GetData(data);
+      NS_ENSURE_SUCCESS(rv, rv);
+
+      if (data.EqualsLiteral(kInsertCookie)) {
+        // Yes it is! Return an error so we bubble out and short-circuit the
+        // search.
+        aResult = aStart;
+
+        // Note: it doesn't matter if this fails.
+        aStart->RemoveChild(child, getter_AddRefs(tmp));
+
+        return NS_SUCCESS_EDITOR_FOUND_TARGET;
+      }
+    }
+
+    rv = FindTargetNode(child, aResult);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (rv == NS_SUCCESS_EDITOR_FOUND_TARGET) {
+      return NS_SUCCESS_EDITOR_FOUND_TARGET;
+    }
+
+    rv = child->GetNextSibling(getter_AddRefs(tmp));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    child = tmp;
+  } while (child);
+
+  return NS_OK;
+}
+
+nsresult
+HTMLEditor::CreateDOMFragmentFromPaste(const nsAString& aInputString,
+                                       const nsAString& aContextStr,
+                                       const nsAString& aInfoStr,
+                                       nsCOMPtr<nsIDOMNode>* outFragNode,
+                                       nsCOMPtr<nsIDOMNode>* outStartNode,
+                                       nsCOMPtr<nsIDOMNode>* outEndNode,
+                                       int32_t* outStartOffset,
+                                       int32_t* outEndOffset,
+                                       bool aTrustedInput)
+{
+  NS_ENSURE_TRUE(outFragNode && outStartNode && outEndNode, NS_ERROR_NULL_POINTER);
+
+  nsCOMPtr<nsIDocument> doc = GetDocument();
+  NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
+
+  // if we have context info, create a fragment for that
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIDOMNode> contextLeaf;
+  RefPtr<DocumentFragment> contextAsNode;
+  if (!aContextStr.IsEmpty()) {
+    rv = ParseFragment(aContextStr, nullptr, doc, getter_AddRefs(contextAsNode),
+                       aTrustedInput);
+    NS_ENSURE_SUCCESS(rv, rv);
+    NS_ENSURE_TRUE(contextAsNode, NS_ERROR_FAILURE);
+
+    rv = StripFormattingNodes(*contextAsNode);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    RemoveBodyAndHead(*contextAsNode);
+
+    rv = FindTargetNode(contextAsNode, contextLeaf);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  nsCOMPtr<nsIContent> contextLeafAsContent = do_QueryInterface(contextLeaf);
+
+  // create fragment for pasted html
+  nsIAtom* contextAtom;
+  if (contextLeafAsContent) {
+    contextAtom = contextLeafAsContent->NodeInfo()->NameAtom();
+    if (contextLeafAsContent->IsHTMLElement(nsGkAtoms::html)) {
+      contextAtom = nsGkAtoms::body;
+    }
+  } else {
+    contextAtom = nsGkAtoms::body;
+  }
+  RefPtr<DocumentFragment> fragment;
+  rv = ParseFragment(aInputString,
+                     contextAtom,
+                     doc,
+                     getter_AddRefs(fragment),
+                     aTrustedInput);
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(fragment, NS_ERROR_FAILURE);
+
+  RemoveBodyAndHead(*fragment);
+
+  if (contextAsNode) {
+    // unite the two trees
+    nsCOMPtr<nsIDOMNode> junk;
+    contextLeaf->AppendChild(fragment, getter_AddRefs(junk));
+    fragment = contextAsNode;
+  }
+
+  rv = StripFormattingNodes(*fragment, true);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // If there was no context, then treat all of the data we did get as the
+  // pasted data.
+  if (contextLeaf) {
+    *outEndNode = *outStartNode = contextLeaf;
+  } else {
+    *outEndNode = *outStartNode = fragment;
+  }
+
+  *outFragNode = fragment.forget();
+  *outStartOffset = 0;
+
+  // get the infoString contents
+  if (!aInfoStr.IsEmpty()) {
+    int32_t sep = aInfoStr.FindChar((char16_t)',');
+    nsAutoString numstr1(Substring(aInfoStr, 0, sep));
+    nsAutoString numstr2(Substring(aInfoStr, sep+1, aInfoStr.Length() - (sep+1)));
+
+    // Move the start and end children.
+    nsresult err;
+    int32_t num = numstr1.ToInteger(&err);
+
+    nsCOMPtr<nsIDOMNode> tmp;
+    while (num--) {
+      (*outStartNode)->GetFirstChild(getter_AddRefs(tmp));
+      NS_ENSURE_TRUE(tmp, NS_ERROR_FAILURE);
+      tmp.swap(*outStartNode);
+    }
+
+    num = numstr2.ToInteger(&err);
+    while (num--) {
+      (*outEndNode)->GetLastChild(getter_AddRefs(tmp));
+      NS_ENSURE_TRUE(tmp, NS_ERROR_FAILURE);
+      tmp.swap(*outEndNode);
+    }
+  }
+
+  nsCOMPtr<nsINode> node = do_QueryInterface(*outEndNode);
+  *outEndOffset = node->Length();
+  return NS_OK;
+}
+
+
+nsresult
+HTMLEditor::ParseFragment(const nsAString& aFragStr,
+                          nsIAtom* aContextLocalName,
+                          nsIDocument* aTargetDocument,
+                          DocumentFragment** aFragment,
+                          bool aTrustedInput)
+{
+  nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
+
+  RefPtr<DocumentFragment> fragment =
+    new DocumentFragment(aTargetDocument->NodeInfoManager());
+  nsresult rv = nsContentUtils::ParseFragmentHTML(aFragStr,
+                                                  fragment,
+                                                  aContextLocalName ?
+                                                    aContextLocalName : nsGkAtoms::body,
+                                                    kNameSpaceID_XHTML,
+                                                  false,
+                                                  true);
+  if (!aTrustedInput) {
+    nsTreeSanitizer sanitizer(aContextLocalName ?
+                              nsIParserUtils::SanitizerAllowStyle :
+                              nsIParserUtils::SanitizerAllowComments);
+    sanitizer.Sanitize(fragment);
+  }
+  fragment.forget(aFragment);
+  return rv;
+}
+
+void
+HTMLEditor::CreateListOfNodesToPaste(
+              DocumentFragment& aFragment,
+              nsTArray<OwningNonNull<nsINode>>& outNodeList,
+              nsINode* aStartNode,
+              int32_t aStartOffset,
+              nsINode* aEndNode,
+              int32_t aEndOffset)
+{
+  // If no info was provided about the boundary between context and stream,
+  // then assume all is stream.
+  if (!aStartNode) {
+    aStartNode = &aFragment;
+    aStartOffset = 0;
+    aEndNode = &aFragment;
+    aEndOffset = aFragment.Length();
+  }
+
+  RefPtr<nsRange> docFragRange;
+  nsresult rv = nsRange::CreateRange(aStartNode, aStartOffset,
+                                     aEndNode, aEndOffset,
+                                     getter_AddRefs(docFragRange));
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  NS_ENSURE_SUCCESS(rv, );
+
+  // Now use a subtree iterator over the range to create a list of nodes
+  TrivialFunctor functor;
+  DOMSubtreeIterator iter;
+  rv = iter.Init(*docFragRange);
+  NS_ENSURE_SUCCESS(rv, );
+  iter.AppendList(functor, outNodeList);
+}
+
+void
+HTMLEditor::GetListAndTableParents(StartOrEnd aStartOrEnd,
+                                   nsTArray<OwningNonNull<nsINode>>& aNodeList,
+                                   nsTArray<OwningNonNull<Element>>& outArray)
+{
+  MOZ_ASSERT(aNodeList.Length());
+
+  // Build up list of parents of first (or last) node in list that are either
+  // lists, or tables.
+  int32_t idx = aStartOrEnd == StartOrEnd::end ? aNodeList.Length() - 1 : 0;
+
+  for (nsCOMPtr<nsINode> node = aNodeList[idx]; node;
+       node = node->GetParentNode()) {
+    if (HTMLEditUtils::IsList(node) || HTMLEditUtils::IsTable(node)) {
+      outArray.AppendElement(*node->AsElement());
+    }
+  }
+}
+
+int32_t
+HTMLEditor::DiscoverPartialListsAndTables(
+              nsTArray<OwningNonNull<nsINode>>& aPasteNodes,
+              nsTArray<OwningNonNull<Element>>& aListsAndTables)
+{
+  int32_t ret = -1;
+  int32_t listAndTableParents = aListsAndTables.Length();
+
+  // Scan insertion list for table elements (other than table).
+  for (auto& curNode : aPasteNodes) {
+    if (HTMLEditUtils::IsTableElement(curNode) &&
+        !curNode->IsHTMLElement(nsGkAtoms::table)) {
+      nsCOMPtr<Element> table = curNode->GetParentElement();
+      while (table && !table->IsHTMLElement(nsGkAtoms::table)) {
+        table = table->GetParentElement();
+      }
+      if (table) {
+        int32_t idx = aListsAndTables.IndexOf(table);
+        if (idx == -1) {
+          return ret;
+        }
+        ret = idx;
+        if (ret == listAndTableParents - 1) {
+          return ret;
+        }
+      }
+    }
+    if (HTMLEditUtils::IsListItem(curNode)) {
+      nsCOMPtr<Element> list = curNode->GetParentElement();
+      while (list && !HTMLEditUtils::IsList(list)) {
+        list = list->GetParentElement();
+      }
+      if (list) {
+        int32_t idx = aListsAndTables.IndexOf(list);
+        if (idx == -1) {
+          return ret;
+        }
+        ret = idx;
+        if (ret == listAndTableParents - 1) {
+          return ret;
+        }
+      }
+    }
+  }
+  return ret;
+}
+
+nsINode*
+HTMLEditor::ScanForListAndTableStructure(
+              StartOrEnd aStartOrEnd,
+              nsTArray<OwningNonNull<nsINode>>& aNodes,
+              Element& aListOrTable)
+{
+  // Look upward from first/last paste node for a piece of this list/table
+  int32_t idx = aStartOrEnd == StartOrEnd::end ? aNodes.Length() - 1 : 0;
+  bool isList = HTMLEditUtils::IsList(&aListOrTable);
+
+  for (nsCOMPtr<nsINode> node = aNodes[idx]; node;
+       node = node->GetParentNode()) {
+    if ((isList && HTMLEditUtils::IsListItem(node)) ||
+        (!isList && HTMLEditUtils::IsTableElement(node) &&
+                    !node->IsHTMLElement(nsGkAtoms::table))) {
+      nsCOMPtr<Element> structureNode = node->GetParentElement();
+      if (isList) {
+        while (structureNode && !HTMLEditUtils::IsList(structureNode)) {
+          structureNode = structureNode->GetParentElement();
+        }
+      } else {
+        while (structureNode &&
+               !structureNode->IsHTMLElement(nsGkAtoms::table)) {
+          structureNode = structureNode->GetParentElement();
+        }
+      }
+      if (structureNode == &aListOrTable) {
+        if (isList) {
+          return structureNode;
+        }
+        return node;
+      }
+    }
+  }
+  return nullptr;
+}
+
+void
+HTMLEditor::ReplaceOrphanedStructure(
+              StartOrEnd aStartOrEnd,
+              nsTArray<OwningNonNull<nsINode>>& aNodeArray,
+              nsTArray<OwningNonNull<Element>>& aListAndTableArray,
+              int32_t aHighWaterMark)
+{
+  OwningNonNull<Element> curNode = aListAndTableArray[aHighWaterMark];
+
+  // Find substructure of list or table that must be included in paste.
+  nsCOMPtr<nsINode> replaceNode =
+    ScanForListAndTableStructure(aStartOrEnd, aNodeArray, curNode);
+
+  if (!replaceNode) {
+    return;
+  }
+
+  // If we found substructure, paste it instead of its descendants.
+  // Only replace with the substructure if all the nodes in the list are
+  // descendants.
+  bool shouldReplaceNodes = true;
+  for (uint32_t i = 0; i < aNodeArray.Length(); i++) {
+    uint32_t idx = aStartOrEnd == StartOrEnd::start ?
+      i : (aNodeArray.Length() - i - 1);
+    OwningNonNull<nsINode> endpoint = aNodeArray[idx];
+    if (!EditorUtils::IsDescendantOf(endpoint, replaceNode)) {
+      shouldReplaceNodes = false;
+      break;
+    }
+  }
+
+  if (shouldReplaceNodes) {
+    // Now replace the removed nodes with the structural parent
+    aNodeArray.Clear();
+    if (aStartOrEnd == StartOrEnd::end) {
+      aNodeArray.AppendElement(*replaceNode);
+    } else {
+      aNodeArray.InsertElementAt(0, *replaceNode);
+    }
+  }
+}
+
+} // namespace mozilla