summaryrefslogtreecommitdiffstats
path: root/editor/libeditor/HTMLEditor.h
blob: f3d78750f9ec837fcc3f1b564fd44192afc32aa3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
/* -*- 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/ComposerCommandsUpdater.h"
#include "mozilla/CSSEditUtils.h"
#include "mozilla/ManualNAC.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/TextEditor.h"
#include "mozilla/TextEditRules.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/File.h"

#include "nsAttrName.h"
#include "nsCOMPtr.h"
#include "nsICSSLoaderObserver.h"
#include "nsIDocumentObserver.h"
#include "nsIDOMElement.h"
#include "nsIDOMEventListener.h"
#include "nsIEditorMailSupport.h"
#include "nsIEditorStyleSheets.h"
#include "nsIEditorUtils.h"
#include "nsIHTMLAbsPosEditor.h"
#include "nsIHTMLEditor.h"
#include "nsIHTMLInlineTableEditor.h"
#include "nsIHTMLObjectResizer.h"
#include "nsITableEditor.h"
#include "nsPoint.h"
#include "nsStubMutationObserver.h"
#include "nsTArray.h"

class nsDocumentFragment;
class nsITransferable;
class nsIClipboard;
class nsIDOMDocument;
class nsIDOMMouseEvent;
class nsILinkHandler;
class nsTableWrapperFrame;
class nsIDOMRange;
class nsRange;
class nsISelection;

namespace mozilla {
class AutoSelectionSetterAfterTableEdit;
class HTMLEditorEventListener;
class HTMLEditRules;
class ResizerSelectionListener;
class TypeInState;
class WSRunObject;
enum class EditAction : int32_t;
struct PropItem;
template <class T>
class OwningNonNull;
namespace dom {
class DocumentFragment;
}  // namespace dom
namespace widget {
struct IMEState;
}  // namespace widget

enum class ParagraphSeparator { div, p, br };

/**
 * 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();

  // nsISelectionListener overrides
  NS_IMETHOD NotifySelectionChanged(nsIDOMDocument* aDOMDocument,
                                    nsISelection* aSelection,
                                    int16_t aReason) override;

  // TextEditor overrides
  virtual nsresult Init(nsIDocument& aDoc, Element* aRoot,
                        nsISelectionController* aSelCon, uint32_t aFlags,
                        const nsAString& aValue) override;
  NS_IMETHOD BeginningOfDocument() override;
  virtual nsresult HandleKeyPressEvent(
      WidgetKeyboardEvent* aKeyboardEvent) override;
  virtual nsIContent* GetFocusedContent() override;
  virtual already_AddRefed<nsIContent> GetFocusedContentForIME() override;
  virtual bool IsActiveInDOMWindow() override;
  virtual dom::EventTarget* GetDOMEventTarget() override;
  virtual Element* GetEditorRoot() override;
  virtual already_AddRefed<nsIContent> FindSelectionRoot(
      nsINode* aNode) override;
  virtual bool IsAcceptableInputEvent(WidgetGUIEvent* aGUIEvent) override;
  virtual already_AddRefed<nsIContent> GetInputEventTargetContent() override;
  using EditorBase::IsEditable;
  virtual nsresult RemoveAttributeOrEquivalent(
      Element* aElement, nsAtom* aAttribute,
      bool aSuppressTransaction) override;
  virtual nsresult SetAttributeOrEquivalent(Element* aElement,
                                            nsAtom* aAttribute,
                                            const nsAString& aValue,
                                            bool aSuppressTransaction) override;
  using EditorBase::RemoveAttributeOrEquivalent;
  using EditorBase::SetAttributeOrEquivalent;

  // nsStubMutationObserver overrides
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED

  // 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(nsINode* aPreviousBlock,
                                       nsINode* aNewBlock,
                                       Element** aOutBrNode);

  nsresult LoadHTML(const nsAString& aInputString);

  nsresult GetCSSBackgroundColorState(bool* aMixed, nsAString& aOutColor,
                                      bool aBlockLevel);
  nsresult GetHTMLBackgroundColorState(bool* aMixed, nsAString& outColor);

  // nsIEditorStyleSheets methods
  NS_DECL_NSIEDITORSTYLESHEETS

  // nsIEditorMailSupport methods
  NS_DECL_NSIEDITORMAILSUPPORT

  // nsITableEditor methods
  NS_DECL_NSITABLEEDITOR

  nsresult GetLastCellInRow(nsIDOMNode* aRowNode, nsIDOMNode** aCellNode);

  nsresult GetCellFromRange(nsRange* aRange, nsIDOMElement** aCell);

  // 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);

  /**
   * GetBlockNodeParent() returns parent or nearest ancestor of aNode if
   * there is a block parent.  If aAncestorLimiter is not nullptr,
   * this stops looking for the result.
   */
  static Element* GetBlockNodeParent(nsINode* aNode,
                                     nsINode* aAncestorLimiter = nullptr);
  /**
   * GetBlock() returns aNode itself, or parent or nearest ancestor of aNode
   * if there is a block parent.  If aAncestorLimiter is not nullptr,
   * this stops looking for the result.
   */
  static Element* GetBlock(nsINode& aNode, nsINode* aAncestorLimiter = nullptr);

  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
  virtual nsresult EndUpdateViewBatch() override;

  NS_IMETHOD PreDestroy(bool aDestroyingFrames) override;

  virtual nsresult GetPreferredIMEState(widget::IMEState* aState) override;

  /**
   * @param aElement        Must not be null.
   */
  static bool NodeIsBlockStatic(const nsINode* aElement);
  static nsresult NodeIsBlockStatic(nsIDOMNode* aNode, bool* aIsBlock);

  // non-virtual methods of interface methods
  bool AbsolutePositioningEnabled() const {
    return mIsAbsolutelyPositioningEnabled;
  }

  /**
   * returns the deepest absolutely positioned container of the selection
   * if it exists or null.
   */
  already_AddRefed<Element> GetAbsolutelyPositionedSelectionContainer();

  Element* GetPositionedElement() const { return mAbsolutelyPositionedObject; }

  /**
   * extracts the selection from the normal flow of the document and
   * positions it.
   * @param aEnabled [IN] true to absolutely position the selection,
   *                      false to put it back in the normal flow
   */
  nsresult SetSelectionToAbsoluteOrStatic(bool aEnabled);

  /**
   * extracts an element from the normal flow of the document and
   * positions it, and puts it back in the normal flow.
   * @param aElement [IN] the element
   * @param aEnabled [IN] true to absolutely position the element,
   *                      false to put it back in the normal flow
   */
  nsresult SetPositionToAbsoluteOrStatic(Element& aElement, bool aEnabled);

  /**
   * returns the absolute z-index of a positioned element. Never returns 'auto'
   * @return         the z-index of the element
   * @param aElement [IN] the element.
   */
  int32_t GetZIndex(Element& aElement);

  /**
   * adds aChange to the z-index of the currently positioned element.
   * @param aChange [IN] relative change to apply to current z-index
   */
  nsresult AddZIndex(int32_t aChange);

  /**
   * adds aChange to the z-index of an arbitrary element.
   * @param aElement [IN] the element
   * @param aChange  [IN] relative change to apply to current z-index of
   *                      the element
   * @param aReturn  [OUT] the new z-index of the element
   */
  nsresult RelativeChangeElementZIndex(Element& aElement, int32_t aChange,
                                       int32_t* aReturn);

  nsresult SetInlineProperty(nsAtom* aProperty, nsAtom* aAttribute,
                             const nsAString& aValue);
  nsresult GetInlineProperty(nsAtom* aProperty, nsAtom* aAttribute,
                             const nsAString& aValue, bool* aFirst, bool* aAny,
                             bool* aAll);
  nsresult GetInlinePropertyWithAttrValue(nsAtom* aProperty, nsAtom* aAttr,
                                          const nsAString& aValue, bool* aFirst,
                                          bool* aAny, bool* aAll,
                                          nsAString& outValue);
  nsresult RemoveInlineProperty(nsAtom* aProperty, nsAtom* aAttribute);

  /**
   * SetComposerCommandsUpdater() sets or unsets mComposerCommandsUpdater.
   * This will crash in debug build if the editor already has an instance
   * but called with another instance.
   */
  void SetComposerCommandsUpdater(
      ComposerCommandsUpdater* aComposerCommandsUpdater) {
    MOZ_ASSERT(!aComposerCommandsUpdater || !mComposerCommandsUpdater ||
               aComposerCommandsUpdater == mComposerCommandsUpdater);
    mComposerCommandsUpdater = aComposerCommandsUpdater;
  }

 protected:
  virtual ~HTMLEditor();

  using EditorBase::IsBlockNode;
  virtual bool IsBlockNode(nsINode* aNode) override;

  virtual void InitializeSelectionAncestorLimit(
      Selection& aSelection, nsIContent& aAncestorLimit) 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(nsAtom& aParentTag,
                                nsAtom& aChildTag) const override;

  /**
   * Returns true if aNode is a container.
   */
  virtual bool IsContainer(nsINode* aNode) override;

  /**
   * Make the given selection span the entire document.
   */
  virtual nsresult SelectEntireDocument(Selection* aSelection) 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(
      nsIDocument& aDocument, const nsAString& aStringToInsert,
      const EditorRawDOMPoint& aPointToInsert,
      EditorRawDOMPoint* aPointAfterInsertedString = nullptr) override;
  virtual bool IsModifiableNode(nsINode* aNode) 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;

  /**
   * InsertNodeIntoProperAncestor() attempts to insert aNode into the document,
   * at aPointToInsert.  Checks with strict dtd to see if containment is
   * allowed.  If not allowed, will attempt to find a parent in the parent
   * hierarchy of aPointToInsert.GetContainer() that will accept aNode as a
   * child.  If such a parent is found, will split the document tree from
   * aPointToInsert up to parent, and then insert aNode. aPointToInsert is then
   * adjusted to point to the actual location that aNode was inserted at.
   * aSplitAtEdges specifies if the splitting process is allowed to result in
   * empty nodes.
   *
   * @param aNode             Node to insert.
   * @param aPointToInsert    Insertion point.
   * @param aSplitAtEdges     Splitting can result in empty nodes?
   * @return                  Returns inserted point if succeeded.
   *                          Otherwise, the result is not set.
   */
  EditorDOMPoint InsertNodeIntoProperAncestor(
      nsIContent& aNode, const EditorRawDOMPoint& aPointToInsert,
      SplitAtEdges aSplitAtEdges);

  /**
   * 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);

  /**
   * IsInVisibleTextFrames() returns true if all text in aText is in visible
   * text frames.  Callers have to guarantee that there is no pending reflow.
   */
  bool IsInVisibleTextFrames(dom::Text& aText);

  /**
   * IsVisibleTextNode() returns true if aText has visible text.  If it has
   * only whitespaces and they are collapsed, returns false.
   */
  bool IsVisibleTextNode(Text& aText);

  /**
   * aNode must be a non-null text node.
   * outIsEmptyNode must be non-null.
   */
  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() const {
    // 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));
  }

  ParagraphSeparator GetDefaultParagraphSeparator() const {
    return mDefaultParagraphSeparator;
  }
  void SetDefaultParagraphSeparator(ParagraphSeparator aSep) {
    mDefaultParagraphSeparator = aSep;
  }

  /**
   * event callback when a mouse button is pressed
   * @param aX      [IN] horizontal position of the pointer
   * @param aY      [IN] vertical position of the pointer
   * @param aTarget [IN] the element triggering the event
   * @param aMouseEvent [IN] the event
   */
  nsresult OnMouseDown(int32_t aX, int32_t aY, nsIDOMElement* aTarget,
                       nsIDOMEvent* aMouseEvent);

  /**
   * event callback when a mouse button is released
   * @param aX      [IN] horizontal position of the pointer
   * @param aY      [IN] vertical position of the pointer
   * @param aTarget [IN] the element triggering the event
   */
  nsresult OnMouseUp(int32_t aX, int32_t aY, nsIDOMElement* aTarget);

  /**
   * event callback when the mouse pointer is moved
   * @param aMouseEvent [IN] the event
   */
  nsresult OnMouseMove(nsIDOMMouseEvent* aMouseEvent);

  /**
   * Modifies the table containing the selection according to the
   * activation of an inline table editing UI element
   * @param aUIAnonymousElement [IN] the inline table editing UI element
   */
  nsresult DoInlineTableEditingAction(const Element& aUIAnonymousElement);

  /**
   * MaybeCollapseSelectionAtFirstEditableNode() may collapse selection at
   * proper position to staring to edit.  If there is a non-editable node
   * before any editable text nodes or inline elements which can have text
   * nodes as their children, collapse selection at start of the editing
   * host.  If there is an editable text node which is not collapsed, collapses
   * selection at the start of the text node.  If there is an editable inline
   * element which cannot have text nodes as its child, collapses selection at
   * before the element node.  Otherwise, collapses selection at start of the
   * editing host.
   *
   * @param aIgnoreIfSelectionInEditingHost
   *                        This method does nothing if selection is in the
   *                        editing host except if it's collapsed at start of
   *                        the editing host.
   *                        Note that if selection ranges were outside of
   *                        current selection limiter, selection was collapsed
   *                        at the start of the editing host therefore, if
   *                        you call this with setting this to true, you can
   *                        keep selection ranges if user has already been
   *                        changed.
   */
  nsresult MaybeCollapseSelectionAtFirstEditableNode(
      bool aIgnoreIfSelectionInEditingHost);

 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();
  Element* GetBodyElement();

  /**
   * 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);

  nsresult TabInTable(bool inIsShift, bool* outHandled);

  /**
   * InsertBR() inserts a new <br> element at selection.  If there is
   * non-collapsed selection ranges, the selected ranges is deleted first.
   */
  nsresult InsertBR();

  // 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.
   */
  nsresult 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.
   */
  nsresult DeleteRow(nsIDOMElement* aTable, int32_t aRowIndex);
  nsresult DeleteColumn(nsIDOMElement* aTable, int32_t aColIndex);
  nsresult DeleteCellContents(nsIDOMElement* aCell);

  /**
   * Move all contents from aCellToMerge into aTargetCell (append at end).
   */
  nsresult MergeCells(nsCOMPtr<nsIDOMElement> aTargetCell,
                      nsCOMPtr<nsIDOMElement> aCellToMerge,
                      bool aDeleteCellToMerge);

  nsresult DeleteTable2(nsIDOMElement* aTable, Selection* aSelection);
  nsresult SetColSpan(nsIDOMElement* aCell, int32_t aColSpan);
  nsresult 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);

  nsresult GetCellSpansAt(nsIDOMElement* aTable, int32_t aRowIndex,
                          int32_t aColIndex, int32_t& aActualRowSpan,
                          int32_t& aActualColSpan);

  nsresult SplitCellIntoColumns(nsIDOMElement* aTable, int32_t aRowIndex,
                                int32_t aColIndex, int32_t aColSpanLeft,
                                int32_t aColSpanRight,
                                nsIDOMElement** aNewCell);

  nsresult 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.
   */
  nsresult FixBadRowSpan(nsIDOMElement* aTable, int32_t aRowIndex,
                         int32_t& aNewRowCount);
  nsresult 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);

  nsresult GetTableSize(Element* aTable, int32_t* aRowCount,
                        int32_t* aColCount);

  // 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 outValue   [OUT] the value of the attribute, if aIsSet is true
   * @return           true if <aProperty aAttribute=aValue> effects
   *                   aNode.
   *
   * The nsIContent variant returns aIsSet instead of using an out parameter.
   */
  bool IsTextPropertySetByContent(nsINode* aNode, nsAtom* aProperty,
                                  nsAtom* aAttribute, const nsAString* aValue,
                                  nsAString* outValue = nullptr);

  // Methods for handling plaintext quotations
  nsresult 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.
   */
  nsresult 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);
  virtual 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);

  bool IsInLink(nsINode* aNode, nsCOMPtr<nsINode>* outLink = nullptr);
  nsresult StripFormattingNodes(nsIContent& aNode, bool aOnlyList = false);
  nsresult CreateDOMFragmentFromPaste(
      const nsAString& aInputString, const nsAString& aContextStr,
      const nsAString& aInfoStr, nsCOMPtr<nsINode>* outFragNode,
      nsCOMPtr<nsINode>* outStartNode, nsCOMPtr<nsINode>* outEndNode,
      int32_t* outStartOffset, int32_t* outEndOffset, bool aTrustedInput);
  nsresult ParseFragment(const nsAString& aStr, nsAtom* aContextLocalName,
                         nsIDocument* aTargetDoc,
                         dom::DocumentFragment** aFragment, bool aTrustedInput);
  void CreateListOfNodesToPaste(dom::DocumentFragment& aFragment,
                                nsTArray<OwningNonNull<nsINode>>& outNodeList,
                                nsINode* aStartContainer, int32_t aStartOffset,
                                nsINode* aEndContainer, 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 IsVisibleBRElement(nsINode* aNode);

  /**
   * GetBetterInsertionPointFor() returns better insertion point to insert
   * aNodeToInsert.
   *
   * @param aNodeToInsert       The node to insert.
   * @param aPointToInsert      A candidate point to insert the node.
   * @return                    Better insertion point if next visible node
   *                            is a <br> element and previous visible node
   *                            is neither none, another <br> element nor
   *                            different block level element.
   */
  EditorRawDOMPoint GetBetterInsertionPointFor(
      nsINode& aNodeToInsert, const EditorRawDOMPoint& aPointToInsert);

  /**
   * 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, nsAtom& aProperty,
                                       nsAtom* aAttribute,
                                       const nsAString& aValue);
  nsresult SetInlinePropertyOnNode(nsIContent& aNode, nsAtom& aProperty,
                                   nsAtom* aAttribute, const nsAString& aValue);

  nsresult PromoteInlineRange(nsRange& aRange);
  nsresult PromoteRangeIfStartsOrEndsInNamedAnchor(nsRange& aRange);
  nsresult SplitStyleAboveRange(nsRange* aRange, nsAtom* aProperty,
                                nsAtom* aAttribute);
  nsresult SplitStyleAbovePoint(nsCOMPtr<nsINode>* aNode, int32_t* aOffset,
                                nsAtom* aProperty, nsAtom* aAttribute,
                                nsIContent** aOutLeftNode = nullptr,
                                nsIContent** aOutRightNode = nullptr);
  nsresult RemoveStyleInside(nsIContent& aNode, nsAtom* aProperty,
                             nsAtom* aAttribute,
                             const bool aChildrenOnly = false);

  bool NodeIsProperty(nsINode& aNode);
  bool IsAtFrontOfNode(nsINode& aNode, int32_t aOffset);
  bool IsAtEndOfNode(nsINode& aNode, int32_t aOffset);
  bool IsOnlyAttribute(const Element* aElement, nsAtom* aAttribute);

  nsresult RemoveBlockContainer(nsIContent& aNode);

  nsIContent* GetPriorHTMLSibling(nsINode* aNode);

  nsIContent* GetNextHTMLSibling(nsINode* aNode);

  /**
   * GetPreviousHTMLElementOrText*() methods are similar to
   * EditorBase::GetPreviousElementOrText*() but this won't return nodes
   * outside active editing host.
   */
  nsIContent* GetPreviousHTMLElementOrText(nsINode& aNode) {
    return GetPreviousHTMLElementOrTextInternal(aNode, false);
  }
  nsIContent* GetPreviousHTMLElementOrTextInBlock(nsINode& aNode) {
    return GetPreviousHTMLElementOrTextInternal(aNode, true);
  }
  nsIContent* GetPreviousHTMLElementOrText(const EditorRawDOMPoint& aPoint) {
    return GetPreviousHTMLElementOrTextInternal(aPoint, false);
  }
  nsIContent* GetPreviousHTMLElementOrTextInBlock(
      const EditorRawDOMPoint& aPoint) {
    return GetPreviousHTMLElementOrTextInternal(aPoint, true);
  }

  /**
   * GetPreviousHTMLElementOrTextInternal() methods are common implementation
   * of above methods.  Please don't use this method directly.
   */
  nsIContent* GetPreviousHTMLElementOrTextInternal(nsINode& aNode,
                                                   bool aNoBlockCrossing);
  nsIContent* GetPreviousHTMLElementOrTextInternal(
      const EditorRawDOMPoint& aPoint, bool aNoBlockCrossing);

  /**
   * GetPreviousEditableHTMLNode*() methods are similar to
   * EditorBase::GetPreviousEditableNode() but this won't return nodes outside
   * active editing host.
   */
  nsIContent* GetPreviousEditableHTMLNode(nsINode& aNode) {
    return GetPreviousEditableHTMLNodeInternal(aNode, false);
  }
  nsIContent* GetPreviousEditableHTMLNodeInBlock(nsINode& aNode) {
    return GetPreviousEditableHTMLNodeInternal(aNode, true);
  }
  nsIContent* GetPreviousEditableHTMLNode(const EditorRawDOMPoint& aPoint) {
    return GetPreviousEditableHTMLNodeInternal(aPoint, false);
  }
  nsIContent* GetPreviousEditableHTMLNodeInBlock(
      const EditorRawDOMPoint& aPoint) {
    return GetPreviousEditableHTMLNodeInternal(aPoint, true);
  }

  /**
   * GetPreviousEditableHTMLNodeInternal() methods are common implementation
   * of above methods.  Please don't use this method directly.
   */
  nsIContent* GetPreviousEditableHTMLNodeInternal(nsINode& aNode,
                                                  bool aNoBlockCrossing);
  nsIContent* GetPreviousEditableHTMLNodeInternal(
      const EditorRawDOMPoint& aPoint, bool aNoBlockCrossing);

  /**
   * GetNextHTMLElementOrText*() methods are similar to
   * EditorBase::GetNextElementOrText*() but this won't return nodes outside
   * active editing host.
   *
   * Note that same as EditorBase::GetTextEditableNode(), methods which take
   * |const EditorRawDOMPoint&| start to search from the node pointed by it.
   * On the other hand, methods which take |nsINode&| start to search from
   * next node of aNode.
   */
  nsIContent* GetNextHTMLElementOrText(nsINode& aNode) {
    return GetNextHTMLElementOrTextInternal(aNode, false);
  }
  nsIContent* GetNextHTMLElementOrTextInBlock(nsINode& aNode) {
    return GetNextHTMLElementOrTextInternal(aNode, true);
  }
  nsIContent* GetNextHTMLElementOrText(const EditorRawDOMPoint& aPoint) {
    return GetNextHTMLElementOrTextInternal(aPoint, false);
  }
  nsIContent* GetNextHTMLElementOrTextInBlock(const EditorRawDOMPoint& aPoint) {
    return GetNextHTMLElementOrTextInternal(aPoint, true);
  }

  /**
   * GetNextHTMLNodeInternal() methods are common implementation
   * of above methods.  Please don't use this method directly.
   */
  nsIContent* GetNextHTMLElementOrTextInternal(nsINode& aNode,
                                               bool aNoBlockCrossing);
  nsIContent* GetNextHTMLElementOrTextInternal(const EditorRawDOMPoint& aPoint,
                                               bool aNoBlockCrossing);

  /**
   * GetNextEditableHTMLNode*() methods are similar to
   * EditorBase::GetNextEditableNode() but this won't return nodes outside
   * active editing host.
   *
   * Note that same as EditorBase::GetTextEditableNode(), methods which take
   * |const EditorRawDOMPoint&| start to search from the node pointed by it.
   * On the other hand, methods which take |nsINode&| start to search from
   * next node of aNode.
   */
  nsIContent* GetNextEditableHTMLNode(nsINode& aNode) {
    return GetNextEditableHTMLNodeInternal(aNode, false);
  }
  nsIContent* GetNextEditableHTMLNodeInBlock(nsINode& aNode) {
    return GetNextEditableHTMLNodeInternal(aNode, true);
  }
  nsIContent* GetNextEditableHTMLNode(const EditorRawDOMPoint& aPoint) {
    return GetNextEditableHTMLNodeInternal(aPoint, false);
  }
  nsIContent* GetNextEditableHTMLNodeInBlock(const EditorRawDOMPoint& aPoint) {
    return GetNextEditableHTMLNodeInternal(aPoint, true);
  }

  /**
   * GetNextEditableHTMLNodeInternal() methods are common implementation
   * of above methods.  Please don't use this method directly.
   */
  nsIContent* GetNextEditableHTMLNodeInternal(nsINode& aNode,
                                              bool aNoBlockCrossing);
  nsIContent* GetNextEditableHTMLNodeInternal(const EditorRawDOMPoint& aPoint,
                                              bool aNoBlockCrossing);

  bool IsFirstEditableChild(nsINode* aNode);
  bool IsLastEditableChild(nsINode* aNode);
  nsIContent* GetFirstEditableChild(nsINode& aNode);
  nsIContent* GetLastEditableChild(nsINode& aNode);

  nsIContent* GetFirstEditableLeaf(nsINode& aNode);
  nsIContent* GetLastEditableLeaf(nsINode& aNode);

  nsresult GetInlinePropertyBase(nsAtom& aProperty, nsAtom* aAttribute,
                                 const nsAString* aValue, bool* aFirst,
                                 bool* aAny, bool* aAll, nsAString* outValue);
  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,
                      nsAtom* aProperty, nsAtom* aAttribute);

  /**
   * sets the position of an element; warning it does NOT check if the
   * element is already positioned or not and that's on purpose.
   * @param aElement [IN] the element
   * @param aX       [IN] the x position in pixels.
   * @param aY       [IN] the y position in pixels.
   */
  void SetTopAndLeft(Element& aElement, int32_t aX, int32_t aY);

  /**
   * Reset a selected cell or collapsed selection (the caret) after table
   * editing.
   *
   * @param aTable      A table in the document.
   * @param aRow        The row ...
   * @param aCol        ... and column defining the cell where we will try to
   *                    place the caret.
   * @param aSelected   If true, we select the whole cell instead of setting
   *                    caret.
   * @param aDirection  If cell at (aCol, aRow) is not found, search for
   *                    previous cell in the same column (aPreviousColumn) or
   *                    row (ePreviousRow) or don't search for another cell
   *                    (aNoSearch).  If no cell is found, caret is place just
   *                    before table; and if that fails, at beginning of
   *                    document.  Thus we generally don't worry about the
   *                    return value and can use the
   *                    AutoSelectionSetterAfterTableEdit stack-based object to
   *                    insure we reset the caret in a table-editing method.
   */
  void SetSelectionAfterTableEdit(nsIDOMElement* aTable, int32_t aRow,
                                  int32_t aCol, int32_t aDirection,
                                  bool aSelected);

  /**
   * A more C++-friendly version of nsIHTMLEditor::GetSelectedElement
   * that just returns null on errors.
   */
  already_AddRefed<dom::Element> GetSelectedElement(const nsAString& aTagName);

 protected:
  RefPtr<TypeInState> mTypeInState;
  RefPtr<ComposerCommandsUpdater> mComposerCommandsUpdater;

  bool mCRInParagraphCreatesParagraph;

  bool mCSSAware;
  UniquePtr<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;

 protected:
  // ANONYMOUS UTILS
  void RemoveListenerAndDeleteRef(const nsAString& aEvent,
                                  nsIDOMEventListener* aListener,
                                  bool aUseCapture, ManualNACPtr aElement,
                                  nsIPresShell* aShell);
  void DeleteRefToAnonymousNode(ManualNACPtr aContent, nsIPresShell* aShell);

  nsresult ShowResizersInner(Element& aResizedElement);

  /**
   * Returns the offset of an element's frame to its absolute containing block.
   */
  nsresult GetElementOrigin(Element& aElement, int32_t& aX, int32_t& aY);
  nsresult GetPositionAndDimensions(Element& 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(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
  ManualNACPtr mTopLeftHandle;
  ManualNACPtr mTopHandle;
  ManualNACPtr mTopRightHandle;
  ManualNACPtr mLeftHandle;
  ManualNACPtr mRightHandle;
  ManualNACPtr mBottomLeftHandle;
  ManualNACPtr mBottomHandle;
  ManualNACPtr mBottomRightHandle;

  nsCOMPtr<Element> mActivatedHandle;

  ManualNACPtr mResizingShadow;
  ManualNACPtr mResizingInfo;

  nsCOMPtr<Element> mResizedObject;

  nsCOMPtr<nsIDOMEventListener> mMouseMotionListenerP;
  nsCOMPtr<nsIDOMEventListener> mResizeEventListenerP;

  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();

  /**
   * Shows active resizers around an element's frame
   * @param aResizedElement [IN] a DOM Element
   */
  nsresult ShowResizers(Element& aResizedElement);

  ManualNACPtr CreateResizer(int16_t aLocation, nsIContent& aParentContent);
  void SetAnonymousElementPosition(int32_t aX, int32_t aY, Element* aResizer);

  ManualNACPtr CreateShadow(nsIContent& aParentContent,
                            Element& aOriginalObject);
  nsresult SetShadowPosition(Element* aShadow, Element* aOriginalObject,
                             int32_t aOriginalObjectX,
                             int32_t aOriginalObjectY);

  ManualNACPtr CreateResizingInfo(nsIContent& aParentContent);
  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 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;
  ManualNACPtr mGrabber;
  ManualNACPtr mPositioningShadow;

  int32_t mGridSize;

  nsresult SetPositionToAbsolute(Element& aElement);
  nsresult SetPositionToStatic(Element& aElement);

  /**
   * sets the z-index of an element.
   * @param aElement [IN] the element
   * @param aZorder  [IN] the z-index
   */
  void SetZIndex(Element& aElement, int32_t aZorder);

  /**
   * shows a grabber attached to an arbitrary element. The grabber is an image
   * positioned on the left hand side of the top border of the element. Draggin
   * and dropping it allows to change the element's absolute position in the
   * document. See chrome://editor/content/images/grabber.gif
   * @param aElement [IN] the element
   */
  nsresult ShowGrabber(Element& aElement);

  /**
   * hide the grabber if it shown.
   */
  void HideGrabber();

  ManualNACPtr CreateGrabber(nsIContent& aParentContent);
  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 GetTemporaryStyleForFocusedPositionedElement(Element& aElement,
                                                        nsAString& aReturn);

  // inline table editing
  RefPtr<Element> mInlineEditedCell;

  ManualNACPtr mAddColumnBeforeButton;
  ManualNACPtr mRemoveColumnButton;
  ManualNACPtr mAddColumnAfterButton;

  ManualNACPtr mAddRowBeforeButton;
  ManualNACPtr mRemoveRowButton;
  ManualNACPtr mAddRowAfterButton;

  /**
   * Shows inline table editing UI around a table cell
   * @param aCell [IN] a DOM Element being a table cell, td or th
   */
  nsresult ShowInlineTableEditingUI(Element* aCell);

  /**
   * Hide all inline table editing UI
   */
  nsresult HideInlineTableEditingUI();

  void AddMouseClickListener(Element* aElement);
  void RemoveMouseClickListener(Element* aElement);

  nsCOMPtr<nsILinkHandler> mLinkHandler;

  ParagraphSeparator mDefaultParagraphSeparator;

 public:
  friend class AutoSelectionSetterAfterTableEdit;
  friend class HTMLEditorEventListener;
  friend class HTMLEditRules;
  friend class TextEditRules;
  friend class WSRunObject;

 private:
  bool IsSimpleModifiableNode(nsIContent* aContent, nsAtom* aProperty,
                              nsAtom* aAttribute, const nsAString* aValue);
  nsresult SetInlinePropertyOnNodeImpl(nsIContent& aNode, nsAtom& aProperty,
                                       nsAtom* aAttribute,
                                       const nsAString& aValue);
  typedef enum { eInserted, eAppended } InsertedOrAppended;
  void DoContentInserted(nsIContent* aChild, InsertedOrAppended);
  already_AddRefed<Element> GetElementOrParentByTagName(
      const nsAString& aTagName, nsINode* aNode);
  already_AddRefed<Element> CreateElementWithDefaults(
      const nsAString& aTagName);
  /**
   * Returns an anonymous Element of type aTag,
   * child of aParentContent. If aIsCreatedHidden is true, the class
   * "hidden" is added to the created element. If aAnonClass is not
   * the empty string, it becomes the value of the attribute "_moz_anonclass"
   * @return a Element
   * @param aTag             [IN] desired type of the element to create
   * @param aParentContent   [IN] the parent node of the created anonymous
   *                              element
   * @param aAnonClass       [IN] contents of the _moz_anonclass attribute
   * @param aIsCreatedHidden [IN] a boolean specifying if the class "hidden"
   *                              is to be added to the created anonymous
   *                              element
   */
  ManualNACPtr CreateAnonymousElement(nsAtom* aTag, nsIContent& aParentContent,
                                      const nsAString& aAnonClass,
                                      bool aIsCreatedHidden);
};

}  // namespace mozilla

mozilla::HTMLEditor* nsIEditor::AsHTMLEditor() {
  return static_cast<mozilla::EditorBase*>(this)->mIsHTMLEditorClass
             ? static_cast<mozilla::HTMLEditor*>(this)
             : nullptr;
}

const mozilla::HTMLEditor* nsIEditor::AsHTMLEditor() const {
  return static_cast<const mozilla::EditorBase*>(this)->mIsHTMLEditorClass
             ? static_cast<const mozilla::HTMLEditor*>(this)
             : nullptr;
}

#endif  // #ifndef mozilla_HTMLEditor_h