Add m-esr52 at 52.6.0

1 files changed, 1109 insertions, 0 deletions

diff --git a/editor/libeditor/HTMLEditor.h b/editor/libeditor/HTMLEditor.h
new file mode 100644
index 000000000..477ec9741
--- /dev/null
+++ b/editor/libeditor/HTMLEditor.h
@@ -0,0 +1,1109 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */
+
+#ifndef mozilla_HTMLEditor_h
+#define mozilla_HTMLEditor_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/CSSEditUtils.h"
+#include "mozilla/StyleSheet.h"
+#include "mozilla/TextEditor.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/File.h"
+
+#include "nsAttrName.h"
+#include "nsAutoPtr.h"
+#include "nsCOMPtr.h"
+#include "nsIContentFilter.h"
+#include "nsICSSLoaderObserver.h"
+#include "nsIDocumentObserver.h"
+#include "nsIDOMElement.h"
+#include "nsIDOMEventListener.h"
+#include "nsIEditor.h"
+#include "nsIEditorMailSupport.h"
+#include "nsIEditorStyleSheets.h"
+#include "nsIEditorUtils.h"
+#include "nsIEditRules.h"
+#include "nsIHTMLAbsPosEditor.h"
+#include "nsIHTMLEditor.h"
+#include "nsIHTMLInlineTableEditor.h"
+#include "nsIHTMLObjectResizeListener.h"
+#include "nsIHTMLObjectResizer.h"
+#include "nsISelectionListener.h"
+#include "nsITableEditor.h"
+#include "nsPoint.h"
+#include "nsStubMutationObserver.h"
+#include "nsTArray.h"
+
+class nsDocumentFragment;
+class nsIDOMKeyEvent;
+class nsITransferable;
+class nsIClipboard;
+class nsILinkHandler;
+class nsTableWrapperFrame;
+class nsIDOMRange;
+class nsRange;
+
+namespace mozilla {
+
+class HTMLEditorEventListener;
+class HTMLEditRules;
+class TextEditRules;
+class TypeInState;
+class WSRunObject;
+struct PropItem;
+template<class T> class OwningNonNull;
+namespace dom {
+class DocumentFragment;
+} // namespace dom
+namespace widget {
+struct IMEState;
+} // namespace widget
+
+/**
+ * The HTML editor implementation.<br>
+ * Use to edit HTML document represented as a DOM tree.
+ */
+class HTMLEditor final : public TextEditor
+                       , public nsIHTMLEditor
+                       , public nsIHTMLObjectResizer
+                       , public nsIHTMLAbsPosEditor
+                       , public nsITableEditor
+                       , public nsIHTMLInlineTableEditor
+                       , public nsIEditorStyleSheets
+                       , public nsICSSLoaderObserver
+                       , public nsStubMutationObserver
+{
+private:
+  enum BlockTransformationType
+  {
+    eNoOp,
+    eReplaceParent = 1,
+    eInsertParent = 2
+  };
+
+  const char16_t kNBSP = 160;
+
+public:
+  enum ResizingRequestID
+  {
+    kX      = 0,
+    kY      = 1,
+    kWidth  = 2,
+    kHeight = 3
+  };
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLEditor, TextEditor)
+
+  HTMLEditor();
+
+  bool GetReturnInParagraphCreatesNewParagraph();
+  Element* GetSelectionContainer();
+
+  // TextEditor overrides
+  NS_IMETHOD GetIsDocumentEditable(bool* aIsDocumentEditable) override;
+  NS_IMETHOD BeginningOfDocument() override;
+  virtual nsresult HandleKeyPressEvent(nsIDOMKeyEvent* aKeyEvent) override;
+  virtual already_AddRefed<nsIContent> GetFocusedContent() override;
+  virtual already_AddRefed<nsIContent> GetFocusedContentForIME() override;
+  virtual bool IsActiveInDOMWindow() override;
+  virtual already_AddRefed<dom::EventTarget> GetDOMEventTarget() override;
+  virtual Element* GetEditorRoot() override;
+  virtual already_AddRefed<nsIContent> FindSelectionRoot(
+                                         nsINode *aNode) override;
+  virtual bool IsAcceptableInputEvent(nsIDOMEvent* aEvent) override;
+  virtual already_AddRefed<nsIContent> GetInputEventTargetContent() override;
+  virtual bool IsEditable(nsINode* aNode) override;
+  using EditorBase::IsEditable;
+
+  // nsStubMutationObserver overrides
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
+
+  // nsIEditorIMESupport overrides
+  NS_IMETHOD GetPreferredIMEState(widget::IMEState* aState) override;
+
+  // nsIHTMLEditor methods
+  NS_DECL_NSIHTMLEDITOR
+
+  // nsIHTMLObjectResizer methods (implemented in HTMLObjectResizer.cpp)
+  NS_DECL_NSIHTMLOBJECTRESIZER
+
+  // nsIHTMLAbsPosEditor methods (implemented in HTMLAbsPositionEditor.cpp)
+  NS_DECL_NSIHTMLABSPOSEDITOR
+
+  // nsIHTMLInlineTableEditor methods (implemented in HTMLInlineTableEditor.cpp)
+  NS_DECL_NSIHTMLINLINETABLEEDITOR
+
+  // XXX Following methods are not overriding but defined here...
+  nsresult CopyLastEditableChildStyles(nsIDOMNode* aPreviousBlock,
+                                       nsIDOMNode* aNewBlock,
+                                       Element** aOutBrNode);
+
+  nsresult LoadHTML(const nsAString& aInputString);
+
+  nsresult GetCSSBackgroundColorState(bool* aMixed, nsAString& aOutColor,
+                                      bool aBlockLevel);
+  NS_IMETHOD GetHTMLBackgroundColorState(bool* aMixed, nsAString& outColor);
+
+  // nsIEditorStyleSheets methods
+  NS_IMETHOD AddStyleSheet(const nsAString& aURL) override;
+  NS_IMETHOD ReplaceStyleSheet(const nsAString& aURL) override;
+  NS_IMETHOD RemoveStyleSheet(const nsAString &aURL) override;
+
+  NS_IMETHOD AddOverrideStyleSheet(const nsAString& aURL) override;
+  NS_IMETHOD ReplaceOverrideStyleSheet(const nsAString& aURL) override;
+  NS_IMETHOD RemoveOverrideStyleSheet(const nsAString &aURL) override;
+
+  NS_IMETHOD EnableStyleSheet(const nsAString& aURL, bool aEnable) override;
+
+  // nsIEditorMailSupport methods
+  NS_DECL_NSIEDITORMAILSUPPORT
+
+  // nsITableEditor methods
+  NS_IMETHOD InsertTableCell(int32_t aNumber, bool aAfter) override;
+  NS_IMETHOD InsertTableColumn(int32_t aNumber, bool aAfter) override;
+  NS_IMETHOD InsertTableRow(int32_t aNumber, bool aAfter) override;
+  NS_IMETHOD DeleteTable() override;
+  NS_IMETHOD DeleteTableCell(int32_t aNumber) override;
+  NS_IMETHOD DeleteTableCellContents() override;
+  NS_IMETHOD DeleteTableColumn(int32_t aNumber) override;
+  NS_IMETHOD DeleteTableRow(int32_t aNumber) override;
+  NS_IMETHOD SelectTableCell() override;
+  NS_IMETHOD SelectBlockOfCells(nsIDOMElement* aStartCell,
+                                nsIDOMElement* aEndCell) override;
+  NS_IMETHOD SelectTableRow() override;
+  NS_IMETHOD SelectTableColumn() override;
+  NS_IMETHOD SelectTable() override;
+  NS_IMETHOD SelectAllTableCells() override;
+  NS_IMETHOD SwitchTableCellHeaderType(nsIDOMElement* aSourceCell,
+                                       nsIDOMElement** aNewCell) override;
+  NS_IMETHOD JoinTableCells(bool aMergeNonContiguousContents) override;
+  NS_IMETHOD SplitTableCell() override;
+  NS_IMETHOD NormalizeTable(nsIDOMElement* aTable) override;
+  NS_IMETHOD GetCellIndexes(nsIDOMElement* aCell,
+                            int32_t* aRowIndex, int32_t* aColIndex) override;
+  NS_IMETHOD GetTableSize(nsIDOMElement* aTable,
+                          int32_t* aRowCount, int32_t* aColCount) override;
+  NS_IMETHOD GetCellAt(nsIDOMElement* aTable, int32_t aRowIndex,
+                       int32_t aColIndex, nsIDOMElement **aCell) override;
+  NS_IMETHOD GetCellDataAt(nsIDOMElement* aTable,
+                           int32_t aRowIndex, int32_t aColIndex,
+                           nsIDOMElement** aCell,
+                           int32_t* aStartRowIndex, int32_t* aStartColIndex,
+                           int32_t* aRowSpan, int32_t* aColSpan,
+                           int32_t* aActualRowSpan, int32_t* aActualColSpan,
+                           bool* aIsSelected) override;
+  NS_IMETHOD GetFirstRow(nsIDOMElement* aTableElement,
+                         nsIDOMNode** aRowNode) override;
+  NS_IMETHOD GetNextRow(nsIDOMNode* aCurrentRowNode,
+                        nsIDOMNode** aRowNode) override;
+  nsresult GetLastCellInRow(nsIDOMNode* aRowNode,
+                            nsIDOMNode** aCellNode);
+
+  NS_IMETHOD SetSelectionAfterTableEdit(nsIDOMElement* aTable, int32_t aRow,
+                                        int32_t aCol, int32_t aDirection,
+                                        bool aSelected) override;
+  NS_IMETHOD GetSelectedOrParentTableElement(
+               nsAString& aTagName, int32_t* aSelectedCount,
+               nsIDOMElement** aTableElement) override;
+  NS_IMETHOD GetSelectedCellsType(nsIDOMElement* aElement,
+                                  uint32_t* aSelectionType) override;
+
+  nsresult GetCellFromRange(nsRange* aRange, nsIDOMElement** aCell);
+
+  /**
+   * Finds the first selected cell in first range of selection
+   * This is in the *order of selection*, not order in the table
+   * (i.e., each cell added to selection is added in another range
+   *  in the selection's rangelist, independent of location in table)
+   * aRange is optional: returns the range around the cell.
+   */
+  NS_IMETHOD GetFirstSelectedCell(nsIDOMRange** aRange,
+                                  nsIDOMElement** aCell) override;
+  /**
+   * Get next cell until no more are found. Always use GetFirstSelected cell
+   * first aRange is optional: returns the range around the cell.
+   */
+  NS_IMETHOD GetNextSelectedCell(nsIDOMRange** aRange,
+                                 nsIDOMElement** aCell) override;
+
+  /**
+   * Upper-left-most selected cell in table.
+   */
+  NS_IMETHOD GetFirstSelectedCellInTable(int32_t* aRowIndex, int32_t* aColIndex,
+                                         nsIDOMElement** aCell) override;
+
+  // Miscellaneous
+
+  /**
+   * This sets background on the appropriate container element (table, cell,)
+   * or calls into nsTextEditor to set the page background.
+   */
+  nsresult SetCSSBackgroundColor(const nsAString& aColor);
+  nsresult SetHTMLBackgroundColor(const nsAString& aColor);
+
+  // Block methods moved from EditorBase
+  static Element* GetBlockNodeParent(nsINode* aNode);
+  static nsIDOMNode* GetBlockNodeParent(nsIDOMNode* aNode);
+  static Element* GetBlock(nsINode& aNode);
+
+  void IsNextCharInNodeWhitespace(nsIContent* aContent,
+                                  int32_t aOffset,
+                                  bool* outIsSpace,
+                                  bool* outIsNBSP,
+                                  nsIContent** outNode = nullptr,
+                                  int32_t* outOffset = 0);
+  void IsPrevCharInNodeWhitespace(nsIContent* aContent,
+                                  int32_t aOffset,
+                                  bool* outIsSpace,
+                                  bool* outIsNBSP,
+                                  nsIContent** outNode = nullptr,
+                                  int32_t* outOffset = 0);
+
+  // Overrides of EditorBase interface methods
+  nsresult EndUpdateViewBatch() override;
+
+  NS_IMETHOD Init(nsIDOMDocument* aDoc, nsIContent* aRoot,
+                  nsISelectionController* aSelCon, uint32_t aFlags,
+                  const nsAString& aValue) override;
+  NS_IMETHOD PreDestroy(bool aDestroyingFrames) override;
+
+  /**
+   * @param aElement        Must not be null.
+   */
+  static bool NodeIsBlockStatic(const nsINode* aElement);
+  static nsresult NodeIsBlockStatic(nsIDOMNode *aNode, bool *aIsBlock);
+
+protected:
+  virtual ~HTMLEditor();
+
+  using EditorBase::IsBlockNode;
+  virtual bool IsBlockNode(nsINode *aNode) override;
+
+public:
+  // XXX Why don't we move following methods above for grouping by the origins?
+  NS_IMETHOD SetFlags(uint32_t aFlags) override;
+
+  NS_IMETHOD Paste(int32_t aSelectionType) override;
+  NS_IMETHOD CanPaste(int32_t aSelectionType, bool* aCanPaste) override;
+
+  NS_IMETHOD PasteTransferable(nsITransferable* aTransferable) override;
+  NS_IMETHOD CanPasteTransferable(nsITransferable* aTransferable,
+                                  bool* aCanPaste) override;
+
+  NS_IMETHOD DebugUnitTests(int32_t* outNumTests,
+                            int32_t* outNumTestsFailed) override;
+
+  /**
+   * All editor operations which alter the doc should be prefaced
+   * with a call to StartOperation, naming the action and direction.
+   */
+  NS_IMETHOD StartOperation(EditAction opID,
+                            nsIEditor::EDirection aDirection) override;
+
+  /**
+   * All editor operations which alter the doc should be followed
+   * with a call to EndOperation.
+   */
+  NS_IMETHOD EndOperation() override;
+
+  /**
+   * returns true if aParentTag can contain a child of type aChildTag.
+   */
+  virtual bool TagCanContainTag(nsIAtom& aParentTag,
+                                nsIAtom& aChildTag) override;
+
+  /**
+   * Returns true if aNode is a container.
+   */
+  virtual bool IsContainer(nsINode* aNode) override;
+  virtual bool IsContainer(nsIDOMNode* aNode) override;
+
+  /**
+   * Make the given selection span the entire document.
+   */
+  virtual nsresult SelectEntireDocument(Selection* aSelection) override;
+
+  NS_IMETHOD SetAttributeOrEquivalent(nsIDOMElement* aElement,
+                                      const nsAString& aAttribute,
+                                      const nsAString& aValue,
+                                      bool aSuppressTransaction) override;
+  NS_IMETHOD RemoveAttributeOrEquivalent(nsIDOMElement* aElement,
+                                         const nsAString& aAttribute,
+                                         bool aSuppressTransaction) override;
+
+  /**
+   * Join together any adjacent editable text nodes in the range.
+   */
+  nsresult CollapseAdjacentTextNodes(nsRange* aRange);
+
+  virtual bool AreNodesSameType(nsIContent* aNode1,
+                                nsIContent* aNode2) override;
+
+  NS_IMETHOD DeleteSelectionImpl(EDirection aAction,
+                                 EStripWrappers aStripWrappers) override;
+  nsresult DeleteNode(nsINode* aNode);
+  NS_IMETHOD DeleteNode(nsIDOMNode* aNode) override;
+  nsresult DeleteText(nsGenericDOMDataNode& aTextNode, uint32_t aOffset,
+                      uint32_t aLength);
+  virtual nsresult InsertTextImpl(const nsAString& aStringToInsert,
+                                  nsCOMPtr<nsINode>* aInOutNode,
+                                  int32_t* aInOutOffset,
+                                  nsIDocument* aDoc) override;
+  NS_IMETHOD_(bool) IsModifiableNode(nsIDOMNode* aNode) override;
+  virtual bool IsModifiableNode(nsINode* aNode) override;
+
+  NS_IMETHOD GetIsSelectionEditable(bool* aIsSelectionEditable) override;
+
+  NS_IMETHOD SelectAll() override;
+
+  // nsICSSLoaderObserver
+  NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet,
+                              bool aWasAlternate, nsresult aStatus) override;
+
+  // Utility Routines, not part of public API
+  NS_IMETHOD TypedText(const nsAString& aString,
+                       ETypingAction aAction) override;
+  nsresult InsertNodeAtPoint(nsIDOMNode* aNode,
+                             nsCOMPtr<nsIDOMNode>* ioParent,
+                             int32_t* ioOffset,
+                             bool aNoEmptyNodes);
+
+  /**
+   * Use this to assure that selection is set after attribute nodes when
+   * trying to collapse selection at begining of a block node
+   * e.g., when setting at beginning of a table cell
+   * This will stop at a table, however, since we don't want to
+   * "drill down" into nested tables.
+   * @param aSelection      Optional. If null, we get current selection.
+   */
+  void CollapseSelectionToDeepestNonTableFirstChild(Selection* aSelection,
+                                                    nsINode* aNode);
+
+  /**
+   * aNode must be a non-null text node.
+   * outIsEmptyNode must be non-null.
+   */
+  nsresult IsVisTextNode(nsIContent* aNode,
+                         bool* outIsEmptyNode,
+                         bool aSafeToAskFrames);
+  nsresult IsEmptyNode(nsIDOMNode* aNode, bool* outIsEmptyBlock,
+                       bool aMozBRDoesntCount = false,
+                       bool aListOrCellNotEmpty = false,
+                       bool aSafeToAskFrames = false);
+  nsresult IsEmptyNode(nsINode* aNode, bool* outIsEmptyBlock,
+                       bool aMozBRDoesntCount = false,
+                       bool aListOrCellNotEmpty = false,
+                       bool aSafeToAskFrames = false);
+  nsresult IsEmptyNodeImpl(nsINode* aNode,
+                           bool* outIsEmptyBlock,
+                           bool aMozBRDoesntCount,
+                           bool aListOrCellNotEmpty,
+                           bool aSafeToAskFrames,
+                           bool* aSeenBR);
+
+  /**
+   * Returns TRUE if sheet was loaded, false if it wasn't.
+   */
+  bool EnableExistingStyleSheet(const nsAString& aURL);
+
+  /**
+   * Dealing with the internal style sheet lists.
+   */
+  StyleSheet* GetStyleSheetForURL(const nsAString& aURL);
+  void GetURLForStyleSheet(StyleSheet* aStyleSheet,
+                           nsAString& aURL);
+
+  /**
+   * Add a url + known style sheet to the internal lists.
+   */
+  nsresult AddNewStyleSheetToList(const nsAString &aURL,
+                                  StyleSheet* aStyleSheet);
+  nsresult RemoveStyleSheetFromList(const nsAString &aURL);
+
+  bool IsCSSEnabled()
+  {
+    // TODO: removal of mCSSAware and use only the presence of mCSSEditUtils
+    return mCSSAware && mCSSEditUtils && mCSSEditUtils->IsCSSPrefChecked();
+  }
+
+  static bool HasAttributes(Element* aElement)
+  {
+    MOZ_ASSERT(aElement);
+    uint32_t attrCount = aElement->GetAttrCount();
+    return attrCount > 1 ||
+           (1 == attrCount &&
+            !aElement->GetAttrNameAt(0)->Equals(nsGkAtoms::mozdirty));
+  }
+
+protected:
+  class BlobReader final : public nsIEditorBlobListener
+  {
+  public:
+    BlobReader(dom::BlobImpl* aBlob, HTMLEditor* aHTMLEditor,
+               bool aIsSafe, nsIDOMDocument* aSourceDoc,
+               nsIDOMNode* aDestinationNode, int32_t aDestOffset,
+               bool aDoDeleteSelection);
+
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSIEDITORBLOBLISTENER
+
+  private:
+    ~BlobReader()
+    {
+    }
+
+    RefPtr<dom::BlobImpl> mBlob;
+    RefPtr<HTMLEditor> mHTMLEditor;
+    bool mIsSafe;
+    nsCOMPtr<nsIDOMDocument> mSourceDoc;
+    nsCOMPtr<nsIDOMNode> mDestinationNode;
+    int32_t mDestOffset;
+    bool mDoDeleteSelection;
+  };
+
+  NS_IMETHOD InitRules() override;
+
+  virtual void CreateEventListeners() override;
+  virtual nsresult InstallEventListeners() override;
+  virtual void RemoveEventListeners() override;
+
+  bool ShouldReplaceRootElement();
+  void NotifyRootChanged();
+  nsresult GetBodyElement(nsIDOMHTMLElement** aBody);
+
+  /**
+   * Get the focused node of this editor.
+   * @return    If the editor has focus, this returns the focused node.
+   *            Otherwise, returns null.
+   */
+  already_AddRefed<nsINode> GetFocusedNode();
+
+  /**
+   * Return TRUE if aElement is a table-related elemet and caret was set.
+   */
+  bool SetCaretInTableCell(nsIDOMElement* aElement);
+
+  NS_IMETHOD TabInTable(bool inIsShift, bool* outHandled);
+  already_AddRefed<Element> CreateBR(nsINode* aNode, int32_t aOffset,
+                                     EDirection aSelect = eNone);
+  NS_IMETHOD CreateBR(
+               nsIDOMNode* aNode, int32_t aOffset,
+               nsCOMPtr<nsIDOMNode>* outBRNode,
+               nsIEditor::EDirection aSelect = nsIEditor::eNone) override;
+
+  // Table Editing (implemented in nsTableEditor.cpp)
+
+  /**
+   * Insert a new cell after or before supplied aCell.
+   * Optional: If aNewCell supplied, returns the newly-created cell (addref'd,
+   * of course)
+   * This doesn't change or use the current selection.
+   */
+  NS_IMETHOD InsertCell(nsIDOMElement* aCell, int32_t aRowSpan,
+                        int32_t aColSpan, bool aAfter, bool aIsHeader,
+                        nsIDOMElement** aNewCell);
+
+  /**
+   * Helpers that don't touch the selection or do batch transactions.
+   */
+  NS_IMETHOD DeleteRow(nsIDOMElement* aTable, int32_t aRowIndex);
+  NS_IMETHOD DeleteColumn(nsIDOMElement* aTable, int32_t aColIndex);
+  NS_IMETHOD DeleteCellContents(nsIDOMElement* aCell);
+
+  /**
+   * Move all contents from aCellToMerge into aTargetCell (append at end).
+   */
+  NS_IMETHOD MergeCells(nsCOMPtr<nsIDOMElement> aTargetCell,
+                        nsCOMPtr<nsIDOMElement> aCellToMerge,
+                        bool aDeleteCellToMerge);
+
+  nsresult DeleteTable2(nsIDOMElement* aTable, Selection* aSelection);
+  NS_IMETHOD SetColSpan(nsIDOMElement* aCell, int32_t aColSpan);
+  NS_IMETHOD SetRowSpan(nsIDOMElement* aCell, int32_t aRowSpan);
+
+  /**
+   * Helper used to get nsTableWrapperFrame for a table.
+   */
+  nsTableWrapperFrame* GetTableFrame(nsIDOMElement* aTable);
+
+  /**
+   * Needed to do appropriate deleting when last cell or row is about to be
+   * deleted.  This doesn't count cells that don't start in the given row (are
+   * spanning from row above).
+   */
+  int32_t GetNumberOfCellsInRow(nsIDOMElement* aTable, int32_t rowIndex);
+
+  /**
+   * Test if all cells in row or column at given index are selected.
+   */
+  bool AllCellsInRowSelected(nsIDOMElement* aTable, int32_t aRowIndex,
+                             int32_t aNumberOfColumns);
+  bool AllCellsInColumnSelected(nsIDOMElement* aTable, int32_t aColIndex,
+                                int32_t aNumberOfRows);
+
+  bool IsEmptyCell(Element* aCell);
+
+  /**
+   * Most insert methods need to get the same basic context data.
+   * Any of the pointers may be null if you don't need that datum (for more
+   * efficiency).
+   * Input: *aCell is a known cell,
+   *        if null, cell is obtained from the anchor node of the selection.
+   * Returns NS_EDITOR_ELEMENT_NOT_FOUND if cell is not found even if aCell is
+   * null.
+   */
+  nsresult GetCellContext(Selection** aSelection, nsIDOMElement** aTable,
+                          nsIDOMElement** aCell, nsIDOMNode** aCellParent,
+                          int32_t* aCellOffset, int32_t* aRowIndex,
+                          int32_t* aColIndex);
+
+  NS_IMETHOD GetCellSpansAt(nsIDOMElement* aTable, int32_t aRowIndex,
+                            int32_t aColIndex, int32_t& aActualRowSpan,
+                            int32_t& aActualColSpan);
+
+  NS_IMETHOD SplitCellIntoColumns(nsIDOMElement* aTable, int32_t aRowIndex,
+                                  int32_t aColIndex, int32_t aColSpanLeft,
+                                  int32_t aColSpanRight,
+                                  nsIDOMElement** aNewCell);
+
+  NS_IMETHOD SplitCellIntoRows(nsIDOMElement* aTable, int32_t aRowIndex,
+                               int32_t aColIndex, int32_t aRowSpanAbove,
+                               int32_t aRowSpanBelow, nsIDOMElement** aNewCell);
+
+  nsresult CopyCellBackgroundColor(nsIDOMElement* destCell,
+                                   nsIDOMElement* sourceCell);
+
+  /**
+   * Reduce rowspan/colspan when cells span into nonexistent rows/columns.
+   */
+  NS_IMETHOD FixBadRowSpan(nsIDOMElement* aTable, int32_t aRowIndex,
+                           int32_t& aNewRowCount);
+  NS_IMETHOD FixBadColSpan(nsIDOMElement* aTable, int32_t aColIndex,
+                           int32_t& aNewColCount);
+
+  /**
+   * Fallback method: Call this after using ClearSelection() and you
+   * failed to set selection to some other content in the document.
+   */
+  nsresult SetSelectionAtDocumentStart(Selection* aSelection);
+
+  // End of Table Editing utilities
+
+  static Element* GetEnclosingTable(nsINode* aNode);
+  static nsIDOMNode* GetEnclosingTable(nsIDOMNode* aNode);
+
+  /**
+   * Content-based query returns true if <aProperty aAttribute=aValue> effects
+   * aNode.  If <aProperty aAttribute=aValue> contains aNode, but
+   * <aProperty aAttribute=SomeOtherValue> also contains aNode and the second is
+   * more deeply nested than the first, then the first does not effect aNode.
+   *
+   * @param aNode      The target of the query
+   * @param aProperty  The property that we are querying for
+   * @param aAttribute The attribute of aProperty, example: color in
+   *                   <FONT color="blue"> May be null.
+   * @param aValue     The value of aAttribute, example: blue in
+   *                   <FONT color="blue"> May be null.  Ignored if aAttribute
+   *                   is null.
+   * @param aIsSet     [OUT] true if <aProperty aAttribute=aValue> effects
+   *                         aNode.
+   * @param outValue   [OUT] the value of the attribute, if aIsSet is true
+   *
+   * The nsIContent variant returns aIsSet instead of using an out parameter.
+   */
+  bool IsTextPropertySetByContent(nsINode* aNode,
+                                  nsIAtom* aProperty,
+                                  const nsAString* aAttribute,
+                                  const nsAString* aValue,
+                                  nsAString* outValue = nullptr);
+
+  void IsTextPropertySetByContent(nsIDOMNode* aNode,
+                                  nsIAtom* aProperty,
+                                  const nsAString* aAttribute,
+                                  const nsAString* aValue,
+                                  bool& aIsSet,
+                                  nsAString* outValue = nullptr);
+
+  // Methods for handling plaintext quotations
+  NS_IMETHOD PasteAsPlaintextQuotation(int32_t aSelectionType);
+
+  /**
+   * Insert a string as quoted text, replacing the selected text (if any).
+   * @param aQuotedText     The string to insert.
+   * @param aAddCites       Whether to prepend extra ">" to each line
+   *                        (usually true, unless those characters
+   *                        have already been added.)
+   * @return aNodeInserted  The node spanning the insertion, if applicable.
+   *                        If aAddCites is false, this will be null.
+   */
+  NS_IMETHOD InsertAsPlaintextQuotation(const nsAString& aQuotedText,
+                                        bool aAddCites,
+                                        nsIDOMNode** aNodeInserted);
+
+  nsresult InsertObject(const nsACString& aType, nsISupports* aObject,
+                        bool aIsSafe,
+                        nsIDOMDocument* aSourceDoc,
+                        nsIDOMNode* aDestinationNode,
+                        int32_t aDestOffset,
+                        bool aDoDeleteSelection);
+
+  // factored methods for handling insertion of data from transferables
+  // (drag&drop or clipboard)
+  NS_IMETHOD PrepareTransferable(nsITransferable** transferable) override;
+  nsresult PrepareHTMLTransferable(nsITransferable** transferable);
+  nsresult InsertFromTransferable(nsITransferable* transferable,
+                                    nsIDOMDocument* aSourceDoc,
+                                    const nsAString& aContextStr,
+                                    const nsAString& aInfoStr,
+                                    bool havePrivateHTMLFlavor,
+                                    nsIDOMNode *aDestinationNode,
+                                    int32_t aDestinationOffset,
+                                    bool aDoDeleteSelection);
+  nsresult InsertFromDataTransfer(dom::DataTransfer* aDataTransfer,
+                                  int32_t aIndex,
+                                  nsIDOMDocument* aSourceDoc,
+                                  nsIDOMNode* aDestinationNode,
+                                  int32_t aDestOffset,
+                                  bool aDoDeleteSelection) override;
+  bool HavePrivateHTMLFlavor(nsIClipboard* clipboard );
+  nsresult ParseCFHTML(nsCString& aCfhtml, char16_t** aStuffToPaste,
+                       char16_t** aCfcontext);
+  nsresult DoContentFilterCallback(const nsAString& aFlavor,
+                                   nsIDOMDocument* aSourceDoc,
+                                   bool aWillDeleteSelection,
+                                   nsIDOMNode** aFragmentAsNode,
+                                   nsIDOMNode** aFragStartNode,
+                                   int32_t* aFragStartOffset,
+                                   nsIDOMNode** aFragEndNode,
+                                   int32_t* aFragEndOffset,
+                                   nsIDOMNode** aTargetNode,
+                                   int32_t* aTargetOffset,
+                                   bool* aDoContinue);
+
+  bool IsInLink(nsIDOMNode* aNode, nsCOMPtr<nsIDOMNode>* outLink = nullptr);
+  nsresult StripFormattingNodes(nsIContent& aNode, bool aOnlyList = false);
+  nsresult 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);
+  nsresult ParseFragment(const nsAString& aStr, nsIAtom* aContextLocalName,
+                         nsIDocument* aTargetDoc,
+                         dom::DocumentFragment** aFragment, bool aTrustedInput);
+  void CreateListOfNodesToPaste(dom::DocumentFragment& aFragment,
+                                nsTArray<OwningNonNull<nsINode>>& outNodeList,
+                                nsINode* aStartNode,
+                                int32_t aStartOffset,
+                                nsINode* aEndNode,
+                                int32_t aEndOffset);
+  nsresult CreateTagStack(nsTArray<nsString>& aTagStack,
+                          nsIDOMNode* aNode);
+  enum class StartOrEnd { start, end };
+  void GetListAndTableParents(StartOrEnd aStartOrEnd,
+                              nsTArray<OwningNonNull<nsINode>>& aNodeList,
+                              nsTArray<OwningNonNull<Element>>& outArray);
+  int32_t DiscoverPartialListsAndTables(
+            nsTArray<OwningNonNull<nsINode>>& aPasteNodes,
+            nsTArray<OwningNonNull<Element>>& aListsAndTables);
+  nsINode* ScanForListAndTableStructure(
+             StartOrEnd aStartOrEnd,
+             nsTArray<OwningNonNull<nsINode>>& aNodes,
+             Element& aListOrTable);
+  void ReplaceOrphanedStructure(
+         StartOrEnd aStartOrEnd,
+         nsTArray<OwningNonNull<nsINode>>& aNodeArray,
+         nsTArray<OwningNonNull<Element>>& aListAndTableArray,
+         int32_t aHighWaterMark);
+
+  /**
+   * Small utility routine to test if a break node is visible to user.
+   */
+  bool IsVisBreak(nsINode* aNode);
+
+  /**
+   * Utility routine to possibly adjust the insertion position when
+   * inserting a block level element.
+   */
+  void NormalizeEOLInsertPosition(nsINode* firstNodeToInsert,
+                                  nsCOMPtr<nsIDOMNode>* insertParentNode,
+                                  int32_t* insertOffset);
+
+  /**
+   * Small utility routine to test the eEditorReadonly bit.
+   */
+  bool IsModifiable();
+
+  /**
+   * Helpers for block transformations.
+   */
+  nsresult MakeDefinitionItem(const nsAString& aItemType);
+  nsresult InsertBasicBlock(const nsAString& aBlockType);
+
+  /**
+   * Increase/decrease the font size of selection.
+   */
+  enum class FontSize { incr, decr };
+  nsresult RelativeFontChange(FontSize aDir);
+
+  /**
+   * Helper routines for font size changing.
+   */
+  nsresult RelativeFontChangeOnTextNode(FontSize aDir,
+                                        Text& aTextNode,
+                                        int32_t aStartOffset,
+                                        int32_t aEndOffset);
+  nsresult RelativeFontChangeOnNode(int32_t aSizeChange, nsIContent* aNode);
+  nsresult RelativeFontChangeHelper(int32_t aSizeChange, nsINode* aNode);
+
+  /**
+   * Helper routines for inline style.
+   */
+  nsresult SetInlinePropertyOnTextNode(Text& aData,
+                                       int32_t aStartOffset,
+                                       int32_t aEndOffset,
+                                       nsIAtom& aProperty,
+                                       const nsAString* aAttribute,
+                                       const nsAString& aValue);
+  nsresult SetInlinePropertyOnNode(nsIContent& aNode,
+                                   nsIAtom& aProperty,
+                                   const nsAString* aAttribute,
+                                   const nsAString& aValue);
+
+  nsresult PromoteInlineRange(nsRange& aRange);
+  nsresult PromoteRangeIfStartsOrEndsInNamedAnchor(nsRange& aRange);
+  nsresult SplitStyleAboveRange(nsRange* aRange,
+                                nsIAtom* aProperty,
+                                const nsAString* aAttribute);
+  nsresult SplitStyleAbovePoint(nsCOMPtr<nsINode>* aNode, int32_t* aOffset,
+                                nsIAtom* aProperty,
+                                const nsAString* aAttribute,
+                                nsIContent** aOutLeftNode = nullptr,
+                                nsIContent** aOutRightNode = nullptr);
+  nsresult ApplyDefaultProperties();
+  nsresult RemoveStyleInside(nsIContent& aNode,
+                             nsIAtom* aProperty,
+                             const nsAString* aAttribute,
+                             const bool aChildrenOnly = false);
+  nsresult RemoveInlinePropertyImpl(nsIAtom* aProperty,
+                                    const nsAString* aAttribute);
+
+  bool NodeIsProperty(nsINode& aNode);
+  bool IsAtFrontOfNode(nsINode& aNode, int32_t aOffset);
+  bool IsAtEndOfNode(nsINode& aNode, int32_t aOffset);
+  bool IsOnlyAttribute(const nsIContent* aElement, const nsAString& aAttribute);
+
+  nsresult RemoveBlockContainer(nsIContent& aNode);
+
+  nsIContent* GetPriorHTMLSibling(nsINode* aNode);
+  nsresult GetPriorHTMLSibling(nsIDOMNode*inNode,
+                               nsCOMPtr<nsIDOMNode>* outNode);
+  nsIContent* GetPriorHTMLSibling(nsINode* aParent, int32_t aOffset);
+  nsresult GetPriorHTMLSibling(nsIDOMNode* inParent, int32_t inOffset,
+                               nsCOMPtr<nsIDOMNode>* outNode);
+
+  nsIContent* GetNextHTMLSibling(nsINode* aNode);
+  nsresult GetNextHTMLSibling(nsIDOMNode* inNode,
+                              nsCOMPtr<nsIDOMNode>* outNode);
+  nsIContent* GetNextHTMLSibling(nsINode* aParent, int32_t aOffset);
+  nsresult GetNextHTMLSibling(nsIDOMNode* inParent, int32_t inOffset,
+                              nsCOMPtr<nsIDOMNode>* outNode);
+
+  nsIContent* GetPriorHTMLNode(nsINode* aNode, bool aNoBlockCrossing = false);
+  nsresult GetPriorHTMLNode(nsIDOMNode* inNode, nsCOMPtr<nsIDOMNode>* outNode,
+                            bool bNoBlockCrossing = false);
+  nsIContent* GetPriorHTMLNode(nsINode* aParent, int32_t aOffset,
+                               bool aNoBlockCrossing = false);
+  nsresult GetPriorHTMLNode(nsIDOMNode* inParent, int32_t inOffset,
+                            nsCOMPtr<nsIDOMNode>* outNode,
+                            bool bNoBlockCrossing = false);
+
+  nsIContent* GetNextHTMLNode(nsINode* aNode, bool aNoBlockCrossing = false);
+  nsresult GetNextHTMLNode(nsIDOMNode* inNode, nsCOMPtr<nsIDOMNode>* outNode,
+                           bool bNoBlockCrossing = false);
+  nsIContent* GetNextHTMLNode(nsINode* aParent, int32_t aOffset,
+                              bool aNoBlockCrossing = false);
+  nsresult GetNextHTMLNode(nsIDOMNode* inParent, int32_t inOffset,
+                           nsCOMPtr<nsIDOMNode>* outNode,
+                           bool bNoBlockCrossing = false);
+
+  nsresult IsFirstEditableChild(nsIDOMNode* aNode, bool* aOutIsFirst);
+  nsresult IsLastEditableChild(nsIDOMNode* aNode, bool* aOutIsLast);
+  nsIContent* GetFirstEditableChild(nsINode& aNode);
+  nsIContent* GetLastEditableChild(nsINode& aNode);
+
+  nsIContent* GetFirstEditableLeaf(nsINode& aNode);
+  nsIContent* GetLastEditableLeaf(nsINode& aNode);
+
+  nsresult GetInlinePropertyBase(nsIAtom& aProperty,
+                                 const nsAString* aAttribute,
+                                 const nsAString* aValue,
+                                 bool* aFirst,
+                                 bool* aAny,
+                                 bool* aAll,
+                                 nsAString* outValue,
+                                 bool aCheckDefaults = true);
+  bool HasStyleOrIdOrClass(Element* aElement);
+  nsresult RemoveElementIfNoStyleOrIdOrClass(Element& aElement);
+
+  /**
+   * Whether the outer window of the DOM event target has focus or not.
+   */
+  bool OurWindowHasFocus();
+
+  /**
+   * This function is used to insert a string of HTML input optionally with some
+   * context information into the editable field.  The HTML input either comes
+   * from a transferable object created as part of a drop/paste operation, or
+   * from the InsertHTML method.  We may want the HTML input to be sanitized
+   * (for example, if it's coming from a transferable object), in which case
+   * aTrustedInput should be set to false, otherwise, the caller should set it
+   * to true, which means that the HTML will be inserted in the DOM verbatim.
+   *
+   * aClearStyle should be set to false if you want the paste to be affected by
+   * local style (e.g., for the insertHTML command).
+   */
+  nsresult 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 = true);
+
+  nsresult ClearStyle(nsCOMPtr<nsINode>* aNode, int32_t* aOffset,
+                      nsIAtom* aProperty, const nsAString* aAttribute);
+
+  void SetElementPosition(Element& aElement, int32_t aX, int32_t aY);
+
+protected:
+  nsTArray<OwningNonNull<nsIContentFilter>> mContentFilters;
+
+  RefPtr<TypeInState> mTypeInState;
+
+  bool mCRInParagraphCreatesParagraph;
+
+  bool mCSSAware;
+  nsAutoPtr<CSSEditUtils> mCSSEditUtils;
+
+  // Used by GetFirstSelectedCell and GetNextSelectedCell
+  int32_t  mSelectedCellIndex;
+
+  nsString mLastStyleSheetURL;
+  nsString mLastOverrideStyleSheetURL;
+
+  // Maintain a list of associated style sheets and their urls.
+  nsTArray<nsString> mStyleSheetURLs;
+  nsTArray<RefPtr<StyleSheet>> mStyleSheets;
+
+  // an array for holding default style settings
+  nsTArray<PropItem*> mDefaultStyles;
+
+protected:
+  // ANONYMOUS UTILS
+  void RemoveListenerAndDeleteRef(const nsAString& aEvent,
+                                  nsIDOMEventListener* aListener,
+                                  bool aUseCapture,
+                                  Element* aElement,
+                                  nsIContent* aParentContent,
+                                  nsIPresShell* aShell);
+  void DeleteRefToAnonymousNode(nsIDOMElement* aElement,
+                                nsIContent* aParentContent,
+                                nsIPresShell* aShell);
+
+  nsresult ShowResizersInner(nsIDOMElement *aResizedElement);
+
+  /**
+   * Returns the offset of an element's frame to its absolute containing block.
+   */
+  nsresult GetElementOrigin(nsIDOMElement* aElement,
+                            int32_t& aX, int32_t& aY);
+  nsresult GetPositionAndDimensions(nsIDOMElement* aElement,
+                                    int32_t& aX, int32_t& aY,
+                                    int32_t& aW, int32_t& aH,
+                                    int32_t& aBorderLeft,
+                                    int32_t& aBorderTop,
+                                    int32_t& aMarginLeft,
+                                    int32_t& aMarginTop);
+
+  bool IsInObservedSubtree(nsIDocument* aDocument,
+                           nsIContent* aContainer,
+                           nsIContent* aChild);
+
+  void UpdateRootElement();
+
+  // resizing
+  bool mIsObjectResizingEnabled;
+  bool mIsResizing;
+  bool mPreserveRatio;
+  bool mResizedObjectIsAnImage;
+
+  // absolute positioning
+  bool mIsAbsolutelyPositioningEnabled;
+  bool mResizedObjectIsAbsolutelyPositioned;
+
+  bool mGrabberClicked;
+  bool mIsMoving;
+
+  bool mSnapToGridEnabled;
+
+  // inline table editing
+  bool mIsInlineTableEditingEnabled;
+
+  // resizing
+  nsCOMPtr<Element> mTopLeftHandle;
+  nsCOMPtr<Element> mTopHandle;
+  nsCOMPtr<Element> mTopRightHandle;
+  nsCOMPtr<Element> mLeftHandle;
+  nsCOMPtr<Element> mRightHandle;
+  nsCOMPtr<Element> mBottomLeftHandle;
+  nsCOMPtr<Element> mBottomHandle;
+  nsCOMPtr<Element> mBottomRightHandle;
+
+  nsCOMPtr<Element> mActivatedHandle;
+
+  nsCOMPtr<Element> mResizingShadow;
+  nsCOMPtr<Element> mResizingInfo;
+
+  nsCOMPtr<Element> mResizedObject;
+
+  nsCOMPtr<nsIDOMEventListener>  mMouseMotionListenerP;
+  nsCOMPtr<nsISelectionListener> mSelectionListenerP;
+  nsCOMPtr<nsIDOMEventListener>  mResizeEventListenerP;
+
+  nsTArray<OwningNonNull<nsIHTMLObjectResizeListener>> mObjectResizeEventListeners;
+
+  int32_t mOriginalX;
+  int32_t mOriginalY;
+
+  int32_t mResizedObjectX;
+  int32_t mResizedObjectY;
+  int32_t mResizedObjectWidth;
+  int32_t mResizedObjectHeight;
+
+  int32_t mResizedObjectMarginLeft;
+  int32_t mResizedObjectMarginTop;
+  int32_t mResizedObjectBorderLeft;
+  int32_t mResizedObjectBorderTop;
+
+  int32_t mXIncrementFactor;
+  int32_t mYIncrementFactor;
+  int32_t mWidthIncrementFactor;
+  int32_t mHeightIncrementFactor;
+
+  int8_t  mInfoXIncrement;
+  int8_t  mInfoYIncrement;
+
+  nsresult SetAllResizersPosition();
+
+  already_AddRefed<Element> CreateResizer(int16_t aLocation,
+                                          nsIDOMNode* aParentNode);
+  void SetAnonymousElementPosition(int32_t aX, int32_t aY,
+                                   nsIDOMElement* aResizer);
+
+  already_AddRefed<Element> CreateShadow(nsIDOMNode* aParentNode,
+                                         nsIDOMElement* aOriginalObject);
+  nsresult SetShadowPosition(Element* aShadow, Element* aOriginalObject,
+                             int32_t aOriginalObjectX,
+                             int32_t aOriginalObjectY);
+
+  already_AddRefed<Element> CreateResizingInfo(nsIDOMNode* aParentNode);
+  nsresult SetResizingInfoPosition(int32_t aX, int32_t aY,
+                                   int32_t aW, int32_t aH);
+
+  int32_t GetNewResizingIncrement(int32_t aX, int32_t aY, int32_t aID);
+  nsresult StartResizing(nsIDOMElement* aHandle);
+  int32_t GetNewResizingX(int32_t aX, int32_t aY);
+  int32_t GetNewResizingY(int32_t aX, int32_t aY);
+  int32_t GetNewResizingWidth(int32_t aX, int32_t aY);
+  int32_t GetNewResizingHeight(int32_t aX, int32_t aY);
+  void HideShadowAndInfo();
+  void SetFinalSize(int32_t aX, int32_t aY);
+  void DeleteRefToAnonymousNode(nsIDOMNode* aNode);
+  void SetResizeIncrements(int32_t aX, int32_t aY, int32_t aW, int32_t aH,
+                           bool aPreserveRatio);
+  void HideAnonymousEditingUIs();
+
+  // absolute positioning
+  int32_t mPositionedObjectX;
+  int32_t mPositionedObjectY;
+  int32_t mPositionedObjectWidth;
+  int32_t mPositionedObjectHeight;
+
+  int32_t mPositionedObjectMarginLeft;
+  int32_t mPositionedObjectMarginTop;
+  int32_t mPositionedObjectBorderLeft;
+  int32_t mPositionedObjectBorderTop;
+
+  nsCOMPtr<Element> mAbsolutelyPositionedObject;
+  nsCOMPtr<Element> mGrabber;
+  nsCOMPtr<Element> mPositioningShadow;
+
+  int32_t mGridSize;
+
+  already_AddRefed<Element> CreateGrabber(nsINode* aParentNode);
+  nsresult StartMoving(nsIDOMElement* aHandle);
+  nsresult SetFinalPosition(int32_t aX, int32_t aY);
+  void AddPositioningOffset(int32_t& aX, int32_t& aY);
+  void SnapToGrid(int32_t& newX, int32_t& newY);
+  nsresult GrabberClicked();
+  nsresult EndMoving();
+  nsresult CheckPositionedElementBGandFG(nsIDOMElement* aElement,
+                                         nsAString& aReturn);
+
+  // inline table editing
+  nsCOMPtr<nsIDOMElement> mInlineEditedCell;
+
+  nsCOMPtr<nsIDOMElement> mAddColumnBeforeButton;
+  nsCOMPtr<nsIDOMElement> mRemoveColumnButton;
+  nsCOMPtr<nsIDOMElement> mAddColumnAfterButton;
+
+  nsCOMPtr<nsIDOMElement> mAddRowBeforeButton;
+  nsCOMPtr<nsIDOMElement> mRemoveRowButton;
+  nsCOMPtr<nsIDOMElement> mAddRowAfterButton;
+
+  void AddMouseClickListener(nsIDOMElement* aElement);
+  void RemoveMouseClickListener(nsIDOMElement* aElement);
+
+  nsCOMPtr<nsILinkHandler> mLinkHandler;
+
+public:
+  friend class HTMLEditorEventListener;
+  friend class HTMLEditRules;
+  friend class TextEditRules;
+  friend class WSRunObject;
+
+private:
+  bool IsSimpleModifiableNode(nsIContent* aContent,
+                              nsIAtom* aProperty,
+                              const nsAString* aAttribute,
+                              const nsAString* aValue);
+  nsresult SetInlinePropertyOnNodeImpl(nsIContent& aNode,
+                                       nsIAtom& aProperty,
+                                       const nsAString* aAttribute,
+                                       const nsAString& aValue);
+  typedef enum { eInserted, eAppended } InsertedOrAppended;
+  void DoContentInserted(nsIDocument* aDocument, nsIContent* aContainer,
+                         nsIContent* aChild, int32_t aIndexInContainer,
+                         InsertedOrAppended aInsertedOrAppended);
+  already_AddRefed<Element> GetElementOrParentByTagName(
+                              const nsAString& aTagName, nsINode* aNode);
+  already_AddRefed<Element> CreateElementWithDefaults(
+                              const nsAString& aTagName);
+};
+
+} // namespace mozilla
+
+#endif // #ifndef mozilla_HTMLEditor_h