1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3  * License, v. 2.0. If a copy of the MPL was not distributed with this
4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 
6 #ifndef mozilla_HTMLEditor_h
7 #define mozilla_HTMLEditor_h
8 
9 #include "mozilla/Attributes.h"
10 #include "mozilla/CSSEditUtils.h"
11 #include "mozilla/StyleSheet.h"
12 #include "mozilla/TextEditor.h"
13 #include "mozilla/dom/Element.h"
14 #include "mozilla/dom/File.h"
15 
16 #include "nsAttrName.h"
17 #include "nsAutoPtr.h"
18 #include "nsCOMPtr.h"
19 #include "nsIContentFilter.h"
20 #include "nsICSSLoaderObserver.h"
21 #include "nsIDocumentObserver.h"
22 #include "nsIDOMElement.h"
23 #include "nsIDOMEventListener.h"
24 #include "nsIEditor.h"
25 #include "nsIEditorMailSupport.h"
26 #include "nsIEditorStyleSheets.h"
27 #include "nsIEditorUtils.h"
28 #include "nsIEditRules.h"
29 #include "nsIHTMLAbsPosEditor.h"
30 #include "nsIHTMLEditor.h"
31 #include "nsIHTMLInlineTableEditor.h"
32 #include "nsIHTMLObjectResizeListener.h"
33 #include "nsIHTMLObjectResizer.h"
34 #include "nsISelectionListener.h"
35 #include "nsITableEditor.h"
36 #include "nsPoint.h"
37 #include "nsStubMutationObserver.h"
38 #include "nsTArray.h"
39 
40 class nsDocumentFragment;
41 class nsIDOMKeyEvent;
42 class nsITransferable;
43 class nsIClipboard;
44 class nsILinkHandler;
45 class nsTableWrapperFrame;
46 class nsIDOMRange;
47 class nsRange;
48 
49 namespace mozilla {
50 
51 class HTMLEditorEventListener;
52 class HTMLEditRules;
53 class TextEditRules;
54 class TypeInState;
55 class WSRunObject;
56 struct PropItem;
57 template<class T> class OwningNonNull;
58 namespace dom {
59 class DocumentFragment;
60 } // namespace dom
61 namespace widget {
62 struct IMEState;
63 } // namespace widget
64 
65 /**
66  * The HTML editor implementation.<br>
67  * Use to edit HTML document represented as a DOM tree.
68  */
69 class HTMLEditor final : public TextEditor
70                        , public nsIHTMLEditor
71                        , public nsIHTMLObjectResizer
72                        , public nsIHTMLAbsPosEditor
73                        , public nsITableEditor
74                        , public nsIHTMLInlineTableEditor
75                        , public nsIEditorStyleSheets
76                        , public nsICSSLoaderObserver
77                        , public nsStubMutationObserver
78 {
79 private:
80   enum BlockTransformationType
81   {
82     eNoOp,
83     eReplaceParent = 1,
84     eInsertParent = 2
85   };
86 
87   const char16_t kNBSP = 160;
88 
89 public:
90   enum ResizingRequestID
91   {
92     kX      = 0,
93     kY      = 1,
94     kWidth  = 2,
95     kHeight = 3
96   };
97 
98   NS_DECL_ISUPPORTS_INHERITED
99   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLEditor, TextEditor)
100 
101   HTMLEditor();
102 
103   bool GetReturnInParagraphCreatesNewParagraph();
104   Element* GetSelectionContainer();
105 
106   // TextEditor overrides
107   NS_IMETHOD GetIsDocumentEditable(bool* aIsDocumentEditable) override;
108   NS_IMETHOD BeginningOfDocument() override;
109   virtual nsresult HandleKeyPressEvent(nsIDOMKeyEvent* aKeyEvent) override;
110   virtual already_AddRefed<nsIContent> GetFocusedContent() override;
111   virtual already_AddRefed<nsIContent> GetFocusedContentForIME() override;
112   virtual bool IsActiveInDOMWindow() override;
113   virtual already_AddRefed<dom::EventTarget> GetDOMEventTarget() override;
114   virtual Element* GetEditorRoot() override;
115   virtual already_AddRefed<nsIContent> FindSelectionRoot(
116                                          nsINode *aNode) override;
117   virtual bool IsAcceptableInputEvent(nsIDOMEvent* aEvent) override;
118   virtual already_AddRefed<nsIContent> GetInputEventTargetContent() override;
119   virtual bool IsEditable(nsINode* aNode) override;
120   using EditorBase::IsEditable;
121 
122   // nsStubMutationObserver overrides
123   NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
124   NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
125   NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
126 
127   // nsIEditorIMESupport overrides
128   NS_IMETHOD GetPreferredIMEState(widget::IMEState* aState) override;
129 
130   // nsIHTMLEditor methods
131   NS_DECL_NSIHTMLEDITOR
132 
133   // nsIHTMLObjectResizer methods (implemented in HTMLObjectResizer.cpp)
134   NS_DECL_NSIHTMLOBJECTRESIZER
135 
136   // nsIHTMLAbsPosEditor methods (implemented in HTMLAbsPositionEditor.cpp)
137   NS_DECL_NSIHTMLABSPOSEDITOR
138 
139   // nsIHTMLInlineTableEditor methods (implemented in HTMLInlineTableEditor.cpp)
140   NS_DECL_NSIHTMLINLINETABLEEDITOR
141 
142   // XXX Following methods are not overriding but defined here...
143   nsresult CopyLastEditableChildStyles(nsIDOMNode* aPreviousBlock,
144                                        nsIDOMNode* aNewBlock,
145                                        Element** aOutBrNode);
146 
147   nsresult LoadHTML(const nsAString& aInputString);
148 
149   nsresult GetCSSBackgroundColorState(bool* aMixed, nsAString& aOutColor,
150                                       bool aBlockLevel);
151   NS_IMETHOD GetHTMLBackgroundColorState(bool* aMixed, nsAString& outColor);
152 
153   // nsIEditorStyleSheets methods
154   NS_IMETHOD AddStyleSheet(const nsAString& aURL) override;
155   NS_IMETHOD ReplaceStyleSheet(const nsAString& aURL) override;
156   NS_IMETHOD RemoveStyleSheet(const nsAString &aURL) override;
157 
158   NS_IMETHOD AddOverrideStyleSheet(const nsAString& aURL) override;
159   NS_IMETHOD ReplaceOverrideStyleSheet(const nsAString& aURL) override;
160   NS_IMETHOD RemoveOverrideStyleSheet(const nsAString &aURL) override;
161 
162   NS_IMETHOD EnableStyleSheet(const nsAString& aURL, bool aEnable) override;
163 
164   // nsIEditorMailSupport methods
165   NS_DECL_NSIEDITORMAILSUPPORT
166 
167   // nsITableEditor methods
168   NS_IMETHOD InsertTableCell(int32_t aNumber, bool aAfter) override;
169   NS_IMETHOD InsertTableColumn(int32_t aNumber, bool aAfter) override;
170   NS_IMETHOD InsertTableRow(int32_t aNumber, bool aAfter) override;
171   NS_IMETHOD DeleteTable() override;
172   NS_IMETHOD DeleteTableCell(int32_t aNumber) override;
173   NS_IMETHOD DeleteTableCellContents() override;
174   NS_IMETHOD DeleteTableColumn(int32_t aNumber) override;
175   NS_IMETHOD DeleteTableRow(int32_t aNumber) override;
176   NS_IMETHOD SelectTableCell() override;
177   NS_IMETHOD SelectBlockOfCells(nsIDOMElement* aStartCell,
178                                 nsIDOMElement* aEndCell) override;
179   NS_IMETHOD SelectTableRow() override;
180   NS_IMETHOD SelectTableColumn() override;
181   NS_IMETHOD SelectTable() override;
182   NS_IMETHOD SelectAllTableCells() override;
183   NS_IMETHOD SwitchTableCellHeaderType(nsIDOMElement* aSourceCell,
184                                        nsIDOMElement** aNewCell) override;
185   NS_IMETHOD JoinTableCells(bool aMergeNonContiguousContents) override;
186   NS_IMETHOD SplitTableCell() override;
187   NS_IMETHOD NormalizeTable(nsIDOMElement* aTable) override;
188   NS_IMETHOD GetCellIndexes(nsIDOMElement* aCell,
189                             int32_t* aRowIndex, int32_t* aColIndex) override;
190   NS_IMETHOD GetTableSize(nsIDOMElement* aTable,
191                           int32_t* aRowCount, int32_t* aColCount) override;
192   NS_IMETHOD GetCellAt(nsIDOMElement* aTable, int32_t aRowIndex,
193                        int32_t aColIndex, nsIDOMElement **aCell) override;
194   NS_IMETHOD GetCellDataAt(nsIDOMElement* aTable,
195                            int32_t aRowIndex, int32_t aColIndex,
196                            nsIDOMElement** aCell,
197                            int32_t* aStartRowIndex, int32_t* aStartColIndex,
198                            int32_t* aRowSpan, int32_t* aColSpan,
199                            int32_t* aActualRowSpan, int32_t* aActualColSpan,
200                            bool* aIsSelected) override;
201   NS_IMETHOD GetFirstRow(nsIDOMElement* aTableElement,
202                          nsIDOMNode** aRowNode) override;
203   NS_IMETHOD GetNextRow(nsIDOMNode* aCurrentRowNode,
204                         nsIDOMNode** aRowNode) override;
205   nsresult GetLastCellInRow(nsIDOMNode* aRowNode,
206                             nsIDOMNode** aCellNode);
207 
208   NS_IMETHOD SetSelectionAfterTableEdit(nsIDOMElement* aTable, int32_t aRow,
209                                         int32_t aCol, int32_t aDirection,
210                                         bool aSelected) override;
211   NS_IMETHOD GetSelectedOrParentTableElement(
212                nsAString& aTagName, int32_t* aSelectedCount,
213                nsIDOMElement** aTableElement) override;
214   NS_IMETHOD GetSelectedCellsType(nsIDOMElement* aElement,
215                                   uint32_t* aSelectionType) override;
216 
217   nsresult GetCellFromRange(nsRange* aRange, nsIDOMElement** aCell);
218 
219   /**
220    * Finds the first selected cell in first range of selection
221    * This is in the *order of selection*, not order in the table
222    * (i.e., each cell added to selection is added in another range
223    *  in the selection's rangelist, independent of location in table)
224    * aRange is optional: returns the range around the cell.
225    */
226   NS_IMETHOD GetFirstSelectedCell(nsIDOMRange** aRange,
227                                   nsIDOMElement** aCell) override;
228   /**
229    * Get next cell until no more are found. Always use GetFirstSelected cell
230    * first aRange is optional: returns the range around the cell.
231    */
232   NS_IMETHOD GetNextSelectedCell(nsIDOMRange** aRange,
233                                  nsIDOMElement** aCell) override;
234 
235   /**
236    * Upper-left-most selected cell in table.
237    */
238   NS_IMETHOD GetFirstSelectedCellInTable(int32_t* aRowIndex, int32_t* aColIndex,
239                                          nsIDOMElement** aCell) override;
240 
241   // Miscellaneous
242 
243   /**
244    * This sets background on the appropriate container element (table, cell,)
245    * or calls into nsTextEditor to set the page background.
246    */
247   nsresult SetCSSBackgroundColor(const nsAString& aColor);
248   nsresult SetHTMLBackgroundColor(const nsAString& aColor);
249 
250   // Block methods moved from EditorBase
251   static Element* GetBlockNodeParent(nsINode* aNode);
252   static nsIDOMNode* GetBlockNodeParent(nsIDOMNode* aNode);
253   static Element* GetBlock(nsINode& aNode);
254 
255   void IsNextCharInNodeWhitespace(nsIContent* aContent,
256                                   int32_t aOffset,
257                                   bool* outIsSpace,
258                                   bool* outIsNBSP,
259                                   nsIContent** outNode = nullptr,
260                                   int32_t* outOffset = 0);
261   void IsPrevCharInNodeWhitespace(nsIContent* aContent,
262                                   int32_t aOffset,
263                                   bool* outIsSpace,
264                                   bool* outIsNBSP,
265                                   nsIContent** outNode = nullptr,
266                                   int32_t* outOffset = 0);
267 
268   // Overrides of EditorBase interface methods
269   nsresult EndUpdateViewBatch() override;
270 
271   NS_IMETHOD Init(nsIDOMDocument* aDoc, nsIContent* aRoot,
272                   nsISelectionController* aSelCon, uint32_t aFlags,
273                   const nsAString& aValue) override;
274   NS_IMETHOD PreDestroy(bool aDestroyingFrames) override;
275 
276   /**
277    * @param aElement        Must not be null.
278    */
279   static bool NodeIsBlockStatic(const nsINode* aElement);
280   static nsresult NodeIsBlockStatic(nsIDOMNode *aNode, bool *aIsBlock);
281 
282 protected:
283   virtual ~HTMLEditor();
284 
285   using EditorBase::IsBlockNode;
286   virtual bool IsBlockNode(nsINode *aNode) override;
287 
288 public:
289   // XXX Why don't we move following methods above for grouping by the origins?
290   NS_IMETHOD SetFlags(uint32_t aFlags) override;
291 
292   NS_IMETHOD Paste(int32_t aSelectionType) override;
293   NS_IMETHOD CanPaste(int32_t aSelectionType, bool* aCanPaste) override;
294 
295   NS_IMETHOD PasteTransferable(nsITransferable* aTransferable) override;
296   NS_IMETHOD CanPasteTransferable(nsITransferable* aTransferable,
297                                   bool* aCanPaste) override;
298 
299   NS_IMETHOD DebugUnitTests(int32_t* outNumTests,
300                             int32_t* outNumTestsFailed) override;
301 
302   /**
303    * All editor operations which alter the doc should be prefaced
304    * with a call to StartOperation, naming the action and direction.
305    */
306   NS_IMETHOD StartOperation(EditAction opID,
307                             nsIEditor::EDirection aDirection) override;
308 
309   /**
310    * All editor operations which alter the doc should be followed
311    * with a call to EndOperation.
312    */
313   NS_IMETHOD EndOperation() override;
314 
315   /**
316    * returns true if aParentTag can contain a child of type aChildTag.
317    */
318   virtual bool TagCanContainTag(nsIAtom& aParentTag,
319                                 nsIAtom& aChildTag) override;
320 
321   /**
322    * Returns true if aNode is a container.
323    */
324   virtual bool IsContainer(nsINode* aNode) override;
325   virtual bool IsContainer(nsIDOMNode* aNode) override;
326 
327   /**
328    * Make the given selection span the entire document.
329    */
330   virtual nsresult SelectEntireDocument(Selection* aSelection) override;
331 
332   NS_IMETHOD SetAttributeOrEquivalent(nsIDOMElement* aElement,
333                                       const nsAString& aAttribute,
334                                       const nsAString& aValue,
335                                       bool aSuppressTransaction) override;
336   NS_IMETHOD RemoveAttributeOrEquivalent(nsIDOMElement* aElement,
337                                          const nsAString& aAttribute,
338                                          bool aSuppressTransaction) override;
339 
340   /**
341    * Join together any adjacent editable text nodes in the range.
342    */
343   nsresult CollapseAdjacentTextNodes(nsRange* aRange);
344 
345   virtual bool AreNodesSameType(nsIContent* aNode1,
346                                 nsIContent* aNode2) override;
347 
348   NS_IMETHOD DeleteSelectionImpl(EDirection aAction,
349                                  EStripWrappers aStripWrappers) override;
350   nsresult DeleteNode(nsINode* aNode);
351   NS_IMETHOD DeleteNode(nsIDOMNode* aNode) override;
352   nsresult DeleteText(nsGenericDOMDataNode& aTextNode, uint32_t aOffset,
353                       uint32_t aLength);
354   virtual nsresult InsertTextImpl(const nsAString& aStringToInsert,
355                                   nsCOMPtr<nsINode>* aInOutNode,
356                                   int32_t* aInOutOffset,
357                                   nsIDocument* aDoc) override;
358   NS_IMETHOD_(bool) IsModifiableNode(nsIDOMNode* aNode) override;
359   virtual bool IsModifiableNode(nsINode* aNode) override;
360 
361   NS_IMETHOD GetIsSelectionEditable(bool* aIsSelectionEditable) override;
362 
363   NS_IMETHOD SelectAll() override;
364 
365   // nsICSSLoaderObserver
366   NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet,
367                               bool aWasAlternate, nsresult aStatus) override;
368 
369   // Utility Routines, not part of public API
370   NS_IMETHOD TypedText(const nsAString& aString,
371                        ETypingAction aAction) override;
372   nsresult InsertNodeAtPoint(nsIDOMNode* aNode,
373                              nsCOMPtr<nsIDOMNode>* ioParent,
374                              int32_t* ioOffset,
375                              bool aNoEmptyNodes);
376 
377   /**
378    * Use this to assure that selection is set after attribute nodes when
379    * trying to collapse selection at begining of a block node
380    * e.g., when setting at beginning of a table cell
381    * This will stop at a table, however, since we don't want to
382    * "drill down" into nested tables.
383    * @param aSelection      Optional. If null, we get current selection.
384    */
385   void CollapseSelectionToDeepestNonTableFirstChild(Selection* aSelection,
386                                                     nsINode* aNode);
387 
388   /**
389    * aNode must be a non-null text node.
390    * outIsEmptyNode must be non-null.
391    */
392   nsresult IsVisTextNode(nsIContent* aNode,
393                          bool* outIsEmptyNode,
394                          bool aSafeToAskFrames);
395   nsresult IsEmptyNode(nsIDOMNode* aNode, bool* outIsEmptyBlock,
396                        bool aMozBRDoesntCount = false,
397                        bool aListOrCellNotEmpty = false,
398                        bool aSafeToAskFrames = false);
399   nsresult IsEmptyNode(nsINode* aNode, bool* outIsEmptyBlock,
400                        bool aMozBRDoesntCount = false,
401                        bool aListOrCellNotEmpty = false,
402                        bool aSafeToAskFrames = false);
403   nsresult IsEmptyNodeImpl(nsINode* aNode,
404                            bool* outIsEmptyBlock,
405                            bool aMozBRDoesntCount,
406                            bool aListOrCellNotEmpty,
407                            bool aSafeToAskFrames,
408                            bool* aSeenBR);
409 
410   /**
411    * Returns TRUE if sheet was loaded, false if it wasn't.
412    */
413   bool EnableExistingStyleSheet(const nsAString& aURL);
414 
415   /**
416    * Dealing with the internal style sheet lists.
417    */
418   StyleSheet* GetStyleSheetForURL(const nsAString& aURL);
419   void GetURLForStyleSheet(StyleSheet* aStyleSheet,
420                            nsAString& aURL);
421 
422   /**
423    * Add a url + known style sheet to the internal lists.
424    */
425   nsresult AddNewStyleSheetToList(const nsAString &aURL,
426                                   StyleSheet* aStyleSheet);
427   nsresult RemoveStyleSheetFromList(const nsAString &aURL);
428 
IsCSSEnabled()429   bool IsCSSEnabled()
430   {
431     // TODO: removal of mCSSAware and use only the presence of mCSSEditUtils
432     return mCSSAware && mCSSEditUtils && mCSSEditUtils->IsCSSPrefChecked();
433   }
434 
HasAttributes(Element * aElement)435   static bool HasAttributes(Element* aElement)
436   {
437     MOZ_ASSERT(aElement);
438     uint32_t attrCount = aElement->GetAttrCount();
439     return attrCount > 1 ||
440            (1 == attrCount &&
441             !aElement->GetAttrNameAt(0)->Equals(nsGkAtoms::mozdirty));
442   }
443 
444 protected:
445   class BlobReader final : public nsIEditorBlobListener
446   {
447   public:
448     BlobReader(dom::BlobImpl* aBlob, HTMLEditor* aHTMLEditor,
449                bool aIsSafe, nsIDOMDocument* aSourceDoc,
450                nsIDOMNode* aDestinationNode, int32_t aDestOffset,
451                bool aDoDeleteSelection);
452 
453     NS_DECL_ISUPPORTS
454     NS_DECL_NSIEDITORBLOBLISTENER
455 
456   private:
~BlobReader()457     ~BlobReader()
458     {
459     }
460 
461     RefPtr<dom::BlobImpl> mBlob;
462     RefPtr<HTMLEditor> mHTMLEditor;
463     bool mIsSafe;
464     nsCOMPtr<nsIDOMDocument> mSourceDoc;
465     nsCOMPtr<nsIDOMNode> mDestinationNode;
466     int32_t mDestOffset;
467     bool mDoDeleteSelection;
468   };
469 
470   NS_IMETHOD InitRules() override;
471 
472   virtual void CreateEventListeners() override;
473   virtual nsresult InstallEventListeners() override;
474   virtual void RemoveEventListeners() override;
475 
476   bool ShouldReplaceRootElement();
477   void NotifyRootChanged();
478   nsresult GetBodyElement(nsIDOMHTMLElement** aBody);
479 
480   /**
481    * Get the focused node of this editor.
482    * @return    If the editor has focus, this returns the focused node.
483    *            Otherwise, returns null.
484    */
485   already_AddRefed<nsINode> GetFocusedNode();
486 
487   /**
488    * Return TRUE if aElement is a table-related elemet and caret was set.
489    */
490   bool SetCaretInTableCell(nsIDOMElement* aElement);
491 
492   NS_IMETHOD TabInTable(bool inIsShift, bool* outHandled);
493   already_AddRefed<Element> CreateBR(nsINode* aNode, int32_t aOffset,
494                                      EDirection aSelect = eNone);
495   NS_IMETHOD CreateBR(
496                nsIDOMNode* aNode, int32_t aOffset,
497                nsCOMPtr<nsIDOMNode>* outBRNode,
498                nsIEditor::EDirection aSelect = nsIEditor::eNone) override;
499 
500   // Table Editing (implemented in nsTableEditor.cpp)
501 
502   /**
503    * Insert a new cell after or before supplied aCell.
504    * Optional: If aNewCell supplied, returns the newly-created cell (addref'd,
505    * of course)
506    * This doesn't change or use the current selection.
507    */
508   NS_IMETHOD InsertCell(nsIDOMElement* aCell, int32_t aRowSpan,
509                         int32_t aColSpan, bool aAfter, bool aIsHeader,
510                         nsIDOMElement** aNewCell);
511 
512   /**
513    * Helpers that don't touch the selection or do batch transactions.
514    */
515   NS_IMETHOD DeleteRow(nsIDOMElement* aTable, int32_t aRowIndex);
516   NS_IMETHOD DeleteColumn(nsIDOMElement* aTable, int32_t aColIndex);
517   NS_IMETHOD DeleteCellContents(nsIDOMElement* aCell);
518 
519   /**
520    * Move all contents from aCellToMerge into aTargetCell (append at end).
521    */
522   NS_IMETHOD MergeCells(nsCOMPtr<nsIDOMElement> aTargetCell,
523                         nsCOMPtr<nsIDOMElement> aCellToMerge,
524                         bool aDeleteCellToMerge);
525 
526   nsresult DeleteTable2(nsIDOMElement* aTable, Selection* aSelection);
527   NS_IMETHOD SetColSpan(nsIDOMElement* aCell, int32_t aColSpan);
528   NS_IMETHOD SetRowSpan(nsIDOMElement* aCell, int32_t aRowSpan);
529 
530   /**
531    * Helper used to get nsTableWrapperFrame for a table.
532    */
533   nsTableWrapperFrame* GetTableFrame(nsIDOMElement* aTable);
534 
535   /**
536    * Needed to do appropriate deleting when last cell or row is about to be
537    * deleted.  This doesn't count cells that don't start in the given row (are
538    * spanning from row above).
539    */
540   int32_t GetNumberOfCellsInRow(nsIDOMElement* aTable, int32_t rowIndex);
541 
542   /**
543    * Test if all cells in row or column at given index are selected.
544    */
545   bool AllCellsInRowSelected(nsIDOMElement* aTable, int32_t aRowIndex,
546                              int32_t aNumberOfColumns);
547   bool AllCellsInColumnSelected(nsIDOMElement* aTable, int32_t aColIndex,
548                                 int32_t aNumberOfRows);
549 
550   bool IsEmptyCell(Element* aCell);
551 
552   /**
553    * Most insert methods need to get the same basic context data.
554    * Any of the pointers may be null if you don't need that datum (for more
555    * efficiency).
556    * Input: *aCell is a known cell,
557    *        if null, cell is obtained from the anchor node of the selection.
558    * Returns NS_EDITOR_ELEMENT_NOT_FOUND if cell is not found even if aCell is
559    * null.
560    */
561   nsresult GetCellContext(Selection** aSelection, nsIDOMElement** aTable,
562                           nsIDOMElement** aCell, nsIDOMNode** aCellParent,
563                           int32_t* aCellOffset, int32_t* aRowIndex,
564                           int32_t* aColIndex);
565 
566   NS_IMETHOD GetCellSpansAt(nsIDOMElement* aTable, int32_t aRowIndex,
567                             int32_t aColIndex, int32_t& aActualRowSpan,
568                             int32_t& aActualColSpan);
569 
570   NS_IMETHOD SplitCellIntoColumns(nsIDOMElement* aTable, int32_t aRowIndex,
571                                   int32_t aColIndex, int32_t aColSpanLeft,
572                                   int32_t aColSpanRight,
573                                   nsIDOMElement** aNewCell);
574 
575   NS_IMETHOD SplitCellIntoRows(nsIDOMElement* aTable, int32_t aRowIndex,
576                                int32_t aColIndex, int32_t aRowSpanAbove,
577                                int32_t aRowSpanBelow, nsIDOMElement** aNewCell);
578 
579   nsresult CopyCellBackgroundColor(nsIDOMElement* destCell,
580                                    nsIDOMElement* sourceCell);
581 
582   /**
583    * Reduce rowspan/colspan when cells span into nonexistent rows/columns.
584    */
585   NS_IMETHOD FixBadRowSpan(nsIDOMElement* aTable, int32_t aRowIndex,
586                            int32_t& aNewRowCount);
587   NS_IMETHOD FixBadColSpan(nsIDOMElement* aTable, int32_t aColIndex,
588                            int32_t& aNewColCount);
589 
590   /**
591    * Fallback method: Call this after using ClearSelection() and you
592    * failed to set selection to some other content in the document.
593    */
594   nsresult SetSelectionAtDocumentStart(Selection* aSelection);
595 
596   // End of Table Editing utilities
597 
598   static Element* GetEnclosingTable(nsINode* aNode);
599   static nsIDOMNode* GetEnclosingTable(nsIDOMNode* aNode);
600 
601   /**
602    * Content-based query returns true if <aProperty aAttribute=aValue> effects
603    * aNode.  If <aProperty aAttribute=aValue> contains aNode, but
604    * <aProperty aAttribute=SomeOtherValue> also contains aNode and the second is
605    * more deeply nested than the first, then the first does not effect aNode.
606    *
607    * @param aNode      The target of the query
608    * @param aProperty  The property that we are querying for
609    * @param aAttribute The attribute of aProperty, example: color in
610    *                   <FONT color="blue"> May be null.
611    * @param aValue     The value of aAttribute, example: blue in
612    *                   <FONT color="blue"> May be null.  Ignored if aAttribute
613    *                   is null.
614    * @param aIsSet     [OUT] true if <aProperty aAttribute=aValue> effects
615    *                         aNode.
616    * @param outValue   [OUT] the value of the attribute, if aIsSet is true
617    *
618    * The nsIContent variant returns aIsSet instead of using an out parameter.
619    */
620   bool IsTextPropertySetByContent(nsINode* aNode,
621                                   nsIAtom* aProperty,
622                                   const nsAString* aAttribute,
623                                   const nsAString* aValue,
624                                   nsAString* outValue = nullptr);
625 
626   void IsTextPropertySetByContent(nsIDOMNode* aNode,
627                                   nsIAtom* aProperty,
628                                   const nsAString* aAttribute,
629                                   const nsAString* aValue,
630                                   bool& aIsSet,
631                                   nsAString* outValue = nullptr);
632 
633   // Methods for handling plaintext quotations
634   NS_IMETHOD PasteAsPlaintextQuotation(int32_t aSelectionType);
635 
636   /**
637    * Insert a string as quoted text, replacing the selected text (if any).
638    * @param aQuotedText     The string to insert.
639    * @param aAddCites       Whether to prepend extra ">" to each line
640    *                        (usually true, unless those characters
641    *                        have already been added.)
642    * @return aNodeInserted  The node spanning the insertion, if applicable.
643    *                        If aAddCites is false, this will be null.
644    */
645   NS_IMETHOD InsertAsPlaintextQuotation(const nsAString& aQuotedText,
646                                         bool aAddCites,
647                                         nsIDOMNode** aNodeInserted);
648 
649   nsresult InsertObject(const nsACString& aType, nsISupports* aObject,
650                         bool aIsSafe,
651                         nsIDOMDocument* aSourceDoc,
652                         nsIDOMNode* aDestinationNode,
653                         int32_t aDestOffset,
654                         bool aDoDeleteSelection);
655 
656   // factored methods for handling insertion of data from transferables
657   // (drag&drop or clipboard)
658   NS_IMETHOD PrepareTransferable(nsITransferable** transferable) override;
659   nsresult PrepareHTMLTransferable(nsITransferable** transferable);
660   nsresult InsertFromTransferable(nsITransferable* transferable,
661                                     nsIDOMDocument* aSourceDoc,
662                                     const nsAString& aContextStr,
663                                     const nsAString& aInfoStr,
664                                     bool havePrivateHTMLFlavor,
665                                     nsIDOMNode *aDestinationNode,
666                                     int32_t aDestinationOffset,
667                                     bool aDoDeleteSelection);
668   nsresult InsertFromDataTransfer(dom::DataTransfer* aDataTransfer,
669                                   int32_t aIndex,
670                                   nsIDOMDocument* aSourceDoc,
671                                   nsIDOMNode* aDestinationNode,
672                                   int32_t aDestOffset,
673                                   bool aDoDeleteSelection) override;
674   bool HavePrivateHTMLFlavor(nsIClipboard* clipboard );
675   nsresult ParseCFHTML(nsCString& aCfhtml, char16_t** aStuffToPaste,
676                        char16_t** aCfcontext);
677   nsresult DoContentFilterCallback(const nsAString& aFlavor,
678                                    nsIDOMDocument* aSourceDoc,
679                                    bool aWillDeleteSelection,
680                                    nsIDOMNode** aFragmentAsNode,
681                                    nsIDOMNode** aFragStartNode,
682                                    int32_t* aFragStartOffset,
683                                    nsIDOMNode** aFragEndNode,
684                                    int32_t* aFragEndOffset,
685                                    nsIDOMNode** aTargetNode,
686                                    int32_t* aTargetOffset,
687                                    bool* aDoContinue);
688 
689   bool IsInLink(nsIDOMNode* aNode, nsCOMPtr<nsIDOMNode>* outLink = nullptr);
690   nsresult StripFormattingNodes(nsIContent& aNode, bool aOnlyList = false);
691   nsresult CreateDOMFragmentFromPaste(const nsAString& aInputString,
692                                       const nsAString& aContextStr,
693                                       const nsAString& aInfoStr,
694                                       nsCOMPtr<nsIDOMNode>* outFragNode,
695                                       nsCOMPtr<nsIDOMNode>* outStartNode,
696                                       nsCOMPtr<nsIDOMNode>* outEndNode,
697                                       int32_t* outStartOffset,
698                                       int32_t* outEndOffset,
699                                       bool aTrustedInput);
700   nsresult ParseFragment(const nsAString& aStr, nsIAtom* aContextLocalName,
701                          nsIDocument* aTargetDoc,
702                          dom::DocumentFragment** aFragment, bool aTrustedInput);
703   void CreateListOfNodesToPaste(dom::DocumentFragment& aFragment,
704                                 nsTArray<OwningNonNull<nsINode>>& outNodeList,
705                                 nsINode* aStartNode,
706                                 int32_t aStartOffset,
707                                 nsINode* aEndNode,
708                                 int32_t aEndOffset);
709   nsresult CreateTagStack(nsTArray<nsString>& aTagStack,
710                           nsIDOMNode* aNode);
711   enum class StartOrEnd { start, end };
712   void GetListAndTableParents(StartOrEnd aStartOrEnd,
713                               nsTArray<OwningNonNull<nsINode>>& aNodeList,
714                               nsTArray<OwningNonNull<Element>>& outArray);
715   int32_t DiscoverPartialListsAndTables(
716             nsTArray<OwningNonNull<nsINode>>& aPasteNodes,
717             nsTArray<OwningNonNull<Element>>& aListsAndTables);
718   nsINode* ScanForListAndTableStructure(
719              StartOrEnd aStartOrEnd,
720              nsTArray<OwningNonNull<nsINode>>& aNodes,
721              Element& aListOrTable);
722   void ReplaceOrphanedStructure(
723          StartOrEnd aStartOrEnd,
724          nsTArray<OwningNonNull<nsINode>>& aNodeArray,
725          nsTArray<OwningNonNull<Element>>& aListAndTableArray,
726          int32_t aHighWaterMark);
727 
728   /**
729    * Small utility routine to test if a break node is visible to user.
730    */
731   bool IsVisBreak(nsINode* aNode);
732 
733   /**
734    * Utility routine to possibly adjust the insertion position when
735    * inserting a block level element.
736    */
737   void NormalizeEOLInsertPosition(nsINode* firstNodeToInsert,
738                                   nsCOMPtr<nsIDOMNode>* insertParentNode,
739                                   int32_t* insertOffset);
740 
741   /**
742    * Small utility routine to test the eEditorReadonly bit.
743    */
744   bool IsModifiable();
745 
746   /**
747    * Helpers for block transformations.
748    */
749   nsresult MakeDefinitionItem(const nsAString& aItemType);
750   nsresult InsertBasicBlock(const nsAString& aBlockType);
751 
752   /**
753    * Increase/decrease the font size of selection.
754    */
755   enum class FontSize { incr, decr };
756   nsresult RelativeFontChange(FontSize aDir);
757 
758   /**
759    * Helper routines for font size changing.
760    */
761   nsresult RelativeFontChangeOnTextNode(FontSize aDir,
762                                         Text& aTextNode,
763                                         int32_t aStartOffset,
764                                         int32_t aEndOffset);
765   nsresult RelativeFontChangeOnNode(int32_t aSizeChange, nsIContent* aNode);
766   nsresult RelativeFontChangeHelper(int32_t aSizeChange, nsINode* aNode);
767 
768   /**
769    * Helper routines for inline style.
770    */
771   nsresult SetInlinePropertyOnTextNode(Text& aData,
772                                        int32_t aStartOffset,
773                                        int32_t aEndOffset,
774                                        nsIAtom& aProperty,
775                                        const nsAString* aAttribute,
776                                        const nsAString& aValue);
777   nsresult SetInlinePropertyOnNode(nsIContent& aNode,
778                                    nsIAtom& aProperty,
779                                    const nsAString* aAttribute,
780                                    const nsAString& aValue);
781 
782   nsresult PromoteInlineRange(nsRange& aRange);
783   nsresult PromoteRangeIfStartsOrEndsInNamedAnchor(nsRange& aRange);
784   nsresult SplitStyleAboveRange(nsRange* aRange,
785                                 nsIAtom* aProperty,
786                                 const nsAString* aAttribute);
787   nsresult SplitStyleAbovePoint(nsCOMPtr<nsINode>* aNode, int32_t* aOffset,
788                                 nsIAtom* aProperty,
789                                 const nsAString* aAttribute,
790                                 nsIContent** aOutLeftNode = nullptr,
791                                 nsIContent** aOutRightNode = nullptr);
792   nsresult ApplyDefaultProperties();
793   nsresult RemoveStyleInside(nsIContent& aNode,
794                              nsIAtom* aProperty,
795                              const nsAString* aAttribute,
796                              const bool aChildrenOnly = false);
797   nsresult RemoveInlinePropertyImpl(nsIAtom* aProperty,
798                                     const nsAString* aAttribute);
799 
800   bool NodeIsProperty(nsINode& aNode);
801   bool IsAtFrontOfNode(nsINode& aNode, int32_t aOffset);
802   bool IsAtEndOfNode(nsINode& aNode, int32_t aOffset);
803   bool IsOnlyAttribute(const nsIContent* aElement, const nsAString& aAttribute);
804 
805   nsresult RemoveBlockContainer(nsIContent& aNode);
806 
807   nsIContent* GetPriorHTMLSibling(nsINode* aNode);
808   nsresult GetPriorHTMLSibling(nsIDOMNode*inNode,
809                                nsCOMPtr<nsIDOMNode>* outNode);
810   nsIContent* GetPriorHTMLSibling(nsINode* aParent, int32_t aOffset);
811   nsresult GetPriorHTMLSibling(nsIDOMNode* inParent, int32_t inOffset,
812                                nsCOMPtr<nsIDOMNode>* outNode);
813 
814   nsIContent* GetNextHTMLSibling(nsINode* aNode);
815   nsresult GetNextHTMLSibling(nsIDOMNode* inNode,
816                               nsCOMPtr<nsIDOMNode>* outNode);
817   nsIContent* GetNextHTMLSibling(nsINode* aParent, int32_t aOffset);
818   nsresult GetNextHTMLSibling(nsIDOMNode* inParent, int32_t inOffset,
819                               nsCOMPtr<nsIDOMNode>* outNode);
820 
821   nsIContent* GetPriorHTMLNode(nsINode* aNode, bool aNoBlockCrossing = false);
822   nsresult GetPriorHTMLNode(nsIDOMNode* inNode, nsCOMPtr<nsIDOMNode>* outNode,
823                             bool bNoBlockCrossing = false);
824   nsIContent* GetPriorHTMLNode(nsINode* aParent, int32_t aOffset,
825                                bool aNoBlockCrossing = false);
826   nsresult GetPriorHTMLNode(nsIDOMNode* inParent, int32_t inOffset,
827                             nsCOMPtr<nsIDOMNode>* outNode,
828                             bool bNoBlockCrossing = false);
829 
830   nsIContent* GetNextHTMLNode(nsINode* aNode, bool aNoBlockCrossing = false);
831   nsresult GetNextHTMLNode(nsIDOMNode* inNode, nsCOMPtr<nsIDOMNode>* outNode,
832                            bool bNoBlockCrossing = false);
833   nsIContent* GetNextHTMLNode(nsINode* aParent, int32_t aOffset,
834                               bool aNoBlockCrossing = false);
835   nsresult GetNextHTMLNode(nsIDOMNode* inParent, int32_t inOffset,
836                            nsCOMPtr<nsIDOMNode>* outNode,
837                            bool bNoBlockCrossing = false);
838 
839   nsresult IsFirstEditableChild(nsIDOMNode* aNode, bool* aOutIsFirst);
840   nsresult IsLastEditableChild(nsIDOMNode* aNode, bool* aOutIsLast);
841   nsIContent* GetFirstEditableChild(nsINode& aNode);
842   nsIContent* GetLastEditableChild(nsINode& aNode);
843 
844   nsIContent* GetFirstEditableLeaf(nsINode& aNode);
845   nsIContent* GetLastEditableLeaf(nsINode& aNode);
846 
847   nsresult GetInlinePropertyBase(nsIAtom& aProperty,
848                                  const nsAString* aAttribute,
849                                  const nsAString* aValue,
850                                  bool* aFirst,
851                                  bool* aAny,
852                                  bool* aAll,
853                                  nsAString* outValue,
854                                  bool aCheckDefaults = true);
855   bool HasStyleOrIdOrClass(Element* aElement);
856   nsresult RemoveElementIfNoStyleOrIdOrClass(Element& aElement);
857 
858   /**
859    * Whether the outer window of the DOM event target has focus or not.
860    */
861   bool OurWindowHasFocus();
862 
863   /**
864    * This function is used to insert a string of HTML input optionally with some
865    * context information into the editable field.  The HTML input either comes
866    * from a transferable object created as part of a drop/paste operation, or
867    * from the InsertHTML method.  We may want the HTML input to be sanitized
868    * (for example, if it's coming from a transferable object), in which case
869    * aTrustedInput should be set to false, otherwise, the caller should set it
870    * to true, which means that the HTML will be inserted in the DOM verbatim.
871    *
872    * aClearStyle should be set to false if you want the paste to be affected by
873    * local style (e.g., for the insertHTML command).
874    */
875   nsresult DoInsertHTMLWithContext(const nsAString& aInputString,
876                                    const nsAString& aContextStr,
877                                    const nsAString& aInfoStr,
878                                    const nsAString& aFlavor,
879                                    nsIDOMDocument* aSourceDoc,
880                                    nsIDOMNode* aDestNode,
881                                    int32_t aDestOffset,
882                                    bool aDeleteSelection,
883                                    bool aTrustedInput,
884                                    bool aClearStyle = true);
885 
886   nsresult ClearStyle(nsCOMPtr<nsINode>* aNode, int32_t* aOffset,
887                       nsIAtom* aProperty, const nsAString* aAttribute);
888 
889   void SetElementPosition(Element& aElement, int32_t aX, int32_t aY);
890 
891 protected:
892   nsTArray<OwningNonNull<nsIContentFilter>> mContentFilters;
893 
894   RefPtr<TypeInState> mTypeInState;
895 
896   bool mCRInParagraphCreatesParagraph;
897 
898   bool mCSSAware;
899   nsAutoPtr<CSSEditUtils> mCSSEditUtils;
900 
901   // Used by GetFirstSelectedCell and GetNextSelectedCell
902   int32_t  mSelectedCellIndex;
903 
904   nsString mLastStyleSheetURL;
905   nsString mLastOverrideStyleSheetURL;
906 
907   // Maintain a list of associated style sheets and their urls.
908   nsTArray<nsString> mStyleSheetURLs;
909   nsTArray<RefPtr<StyleSheet>> mStyleSheets;
910 
911   // an array for holding default style settings
912   nsTArray<PropItem*> mDefaultStyles;
913 
914 protected:
915   // ANONYMOUS UTILS
916   void RemoveListenerAndDeleteRef(const nsAString& aEvent,
917                                   nsIDOMEventListener* aListener,
918                                   bool aUseCapture,
919                                   Element* aElement,
920                                   nsIContent* aParentContent,
921                                   nsIPresShell* aShell);
922   void DeleteRefToAnonymousNode(nsIDOMElement* aElement,
923                                 nsIContent* aParentContent,
924                                 nsIPresShell* aShell);
925 
926   nsresult ShowResizersInner(nsIDOMElement *aResizedElement);
927 
928   /**
929    * Returns the offset of an element's frame to its absolute containing block.
930    */
931   nsresult GetElementOrigin(nsIDOMElement* aElement,
932                             int32_t& aX, int32_t& aY);
933   nsresult GetPositionAndDimensions(nsIDOMElement* aElement,
934                                     int32_t& aX, int32_t& aY,
935                                     int32_t& aW, int32_t& aH,
936                                     int32_t& aBorderLeft,
937                                     int32_t& aBorderTop,
938                                     int32_t& aMarginLeft,
939                                     int32_t& aMarginTop);
940 
941   bool IsInObservedSubtree(nsIDocument* aDocument,
942                            nsIContent* aContainer,
943                            nsIContent* aChild);
944 
945   void UpdateRootElement();
946 
947   // resizing
948   bool mIsObjectResizingEnabled;
949   bool mIsResizing;
950   bool mPreserveRatio;
951   bool mResizedObjectIsAnImage;
952 
953   // absolute positioning
954   bool mIsAbsolutelyPositioningEnabled;
955   bool mResizedObjectIsAbsolutelyPositioned;
956 
957   bool mGrabberClicked;
958   bool mIsMoving;
959 
960   bool mSnapToGridEnabled;
961 
962   // inline table editing
963   bool mIsInlineTableEditingEnabled;
964 
965   // resizing
966   nsCOMPtr<Element> mTopLeftHandle;
967   nsCOMPtr<Element> mTopHandle;
968   nsCOMPtr<Element> mTopRightHandle;
969   nsCOMPtr<Element> mLeftHandle;
970   nsCOMPtr<Element> mRightHandle;
971   nsCOMPtr<Element> mBottomLeftHandle;
972   nsCOMPtr<Element> mBottomHandle;
973   nsCOMPtr<Element> mBottomRightHandle;
974 
975   nsCOMPtr<Element> mActivatedHandle;
976 
977   nsCOMPtr<Element> mResizingShadow;
978   nsCOMPtr<Element> mResizingInfo;
979 
980   nsCOMPtr<Element> mResizedObject;
981 
982   nsCOMPtr<nsIDOMEventListener>  mMouseMotionListenerP;
983   nsCOMPtr<nsISelectionListener> mSelectionListenerP;
984   nsCOMPtr<nsIDOMEventListener>  mResizeEventListenerP;
985 
986   nsTArray<OwningNonNull<nsIHTMLObjectResizeListener>> mObjectResizeEventListeners;
987 
988   int32_t mOriginalX;
989   int32_t mOriginalY;
990 
991   int32_t mResizedObjectX;
992   int32_t mResizedObjectY;
993   int32_t mResizedObjectWidth;
994   int32_t mResizedObjectHeight;
995 
996   int32_t mResizedObjectMarginLeft;
997   int32_t mResizedObjectMarginTop;
998   int32_t mResizedObjectBorderLeft;
999   int32_t mResizedObjectBorderTop;
1000 
1001   int32_t mXIncrementFactor;
1002   int32_t mYIncrementFactor;
1003   int32_t mWidthIncrementFactor;
1004   int32_t mHeightIncrementFactor;
1005 
1006   int8_t  mInfoXIncrement;
1007   int8_t  mInfoYIncrement;
1008 
1009   nsresult SetAllResizersPosition();
1010 
1011   already_AddRefed<Element> CreateResizer(int16_t aLocation,
1012                                           nsIDOMNode* aParentNode);
1013   void SetAnonymousElementPosition(int32_t aX, int32_t aY,
1014                                    nsIDOMElement* aResizer);
1015 
1016   already_AddRefed<Element> CreateShadow(nsIDOMNode* aParentNode,
1017                                          nsIDOMElement* aOriginalObject);
1018   nsresult SetShadowPosition(Element* aShadow, Element* aOriginalObject,
1019                              int32_t aOriginalObjectX,
1020                              int32_t aOriginalObjectY);
1021 
1022   already_AddRefed<Element> CreateResizingInfo(nsIDOMNode* aParentNode);
1023   nsresult SetResizingInfoPosition(int32_t aX, int32_t aY,
1024                                    int32_t aW, int32_t aH);
1025 
1026   int32_t GetNewResizingIncrement(int32_t aX, int32_t aY, int32_t aID);
1027   nsresult StartResizing(nsIDOMElement* aHandle);
1028   int32_t GetNewResizingX(int32_t aX, int32_t aY);
1029   int32_t GetNewResizingY(int32_t aX, int32_t aY);
1030   int32_t GetNewResizingWidth(int32_t aX, int32_t aY);
1031   int32_t GetNewResizingHeight(int32_t aX, int32_t aY);
1032   void HideShadowAndInfo();
1033   void SetFinalSize(int32_t aX, int32_t aY);
1034   void DeleteRefToAnonymousNode(nsIDOMNode* aNode);
1035   void SetResizeIncrements(int32_t aX, int32_t aY, int32_t aW, int32_t aH,
1036                            bool aPreserveRatio);
1037   void HideAnonymousEditingUIs();
1038 
1039   // absolute positioning
1040   int32_t mPositionedObjectX;
1041   int32_t mPositionedObjectY;
1042   int32_t mPositionedObjectWidth;
1043   int32_t mPositionedObjectHeight;
1044 
1045   int32_t mPositionedObjectMarginLeft;
1046   int32_t mPositionedObjectMarginTop;
1047   int32_t mPositionedObjectBorderLeft;
1048   int32_t mPositionedObjectBorderTop;
1049 
1050   nsCOMPtr<Element> mAbsolutelyPositionedObject;
1051   nsCOMPtr<Element> mGrabber;
1052   nsCOMPtr<Element> mPositioningShadow;
1053 
1054   int32_t mGridSize;
1055 
1056   already_AddRefed<Element> CreateGrabber(nsINode* aParentNode);
1057   nsresult StartMoving(nsIDOMElement* aHandle);
1058   nsresult SetFinalPosition(int32_t aX, int32_t aY);
1059   void AddPositioningOffset(int32_t& aX, int32_t& aY);
1060   void SnapToGrid(int32_t& newX, int32_t& newY);
1061   nsresult GrabberClicked();
1062   nsresult EndMoving();
1063   nsresult CheckPositionedElementBGandFG(nsIDOMElement* aElement,
1064                                          nsAString& aReturn);
1065 
1066   // inline table editing
1067   nsCOMPtr<nsIDOMElement> mInlineEditedCell;
1068 
1069   nsCOMPtr<nsIDOMElement> mAddColumnBeforeButton;
1070   nsCOMPtr<nsIDOMElement> mRemoveColumnButton;
1071   nsCOMPtr<nsIDOMElement> mAddColumnAfterButton;
1072 
1073   nsCOMPtr<nsIDOMElement> mAddRowBeforeButton;
1074   nsCOMPtr<nsIDOMElement> mRemoveRowButton;
1075   nsCOMPtr<nsIDOMElement> mAddRowAfterButton;
1076 
1077   void AddMouseClickListener(nsIDOMElement* aElement);
1078   void RemoveMouseClickListener(nsIDOMElement* aElement);
1079 
1080   nsCOMPtr<nsILinkHandler> mLinkHandler;
1081 
1082 public:
1083   friend class HTMLEditorEventListener;
1084   friend class HTMLEditRules;
1085   friend class TextEditRules;
1086   friend class WSRunObject;
1087 
1088 private:
1089   bool IsSimpleModifiableNode(nsIContent* aContent,
1090                               nsIAtom* aProperty,
1091                               const nsAString* aAttribute,
1092                               const nsAString* aValue);
1093   nsresult SetInlinePropertyOnNodeImpl(nsIContent& aNode,
1094                                        nsIAtom& aProperty,
1095                                        const nsAString* aAttribute,
1096                                        const nsAString& aValue);
1097   typedef enum { eInserted, eAppended } InsertedOrAppended;
1098   void DoContentInserted(nsIDocument* aDocument, nsIContent* aContainer,
1099                          nsIContent* aChild, int32_t aIndexInContainer,
1100                          InsertedOrAppended aInsertedOrAppended);
1101   already_AddRefed<Element> GetElementOrParentByTagName(
1102                               const nsAString& aTagName, nsINode* aNode);
1103   already_AddRefed<Element> CreateElementWithDefaults(
1104                               const nsAString& aTagName);
1105 };
1106 
1107 } // namespace mozilla
1108 
1109 #endif // #ifndef mozilla_HTMLEditor_h
1110