forked from Floorp-Projects/Floorp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathnsCSSFrameConstructor.cpp
11495 lines (10106 loc) · 449 KB
/
nsCSSFrameConstructor.cpp
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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=2:et:sw=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/. */
/*
* construction of a frame tree that is nearly isomorphic to the content
* tree and updating of that tree in response to dynamic changes
*/
#include "nsCSSFrameConstructor.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/dom/HTMLSelectElement.h"
#include "mozilla/EventStates.h"
#include "mozilla/Likely.h"
#include "mozilla/LinkedList.h"
#include "nsAbsoluteContainingBlock.h"
#include "nsIAtom.h"
#include "nsIFrameInlines.h"
#include "nsGkAtoms.h"
#include "nsPresContext.h"
#include "nsIDocument.h"
#include "nsTableFrame.h"
#include "nsTableColFrame.h"
#include "nsTableRowFrame.h"
#include "nsTableCellFrame.h"
#include "nsIDOMHTMLDocument.h"
#include "nsHTMLParts.h"
#include "nsPresShell.h"
#include "nsIPresShell.h"
#include "nsUnicharUtils.h"
#include "nsStyleSet.h"
#include "nsViewManager.h"
#include "nsStyleConsts.h"
#include "nsIDOMXULElement.h"
#include "nsContainerFrame.h"
#include "nsNameSpaceManager.h"
#include "nsIComboboxControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsIDOMCharacterData.h"
#include "nsPlaceholderFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsIFormControl.h"
#include "nsCSSAnonBoxes.h"
#include "nsTextFragment.h"
#include "nsIAnonymousContentCreator.h"
#include "nsBindingManager.h"
#include "nsXBLBinding.h"
#include "nsContentUtils.h"
#include "nsIScriptError.h"
#ifdef XP_MACOSX
#include "nsIDocShell.h"
#endif
#include "ChildIterator.h"
#include "nsError.h"
#include "nsLayoutUtils.h"
#include "nsAutoPtr.h"
#include "nsBoxFrame.h"
#include "nsBoxLayout.h"
#include "nsFlexContainerFrame.h"
#include "nsGridContainerFrame.h"
#include "nsImageFrame.h"
#include "nsIObjectLoadingContent.h"
#include "nsTArray.h"
#include "nsGenericDOMDataNode.h"
#include "mozilla/dom/Element.h"
#include "nsAutoLayoutPhase.h"
#include "nsStyleStructInlines.h"
#include "nsPageContentFrame.h"
#include "RestyleManager.h"
#include "StickyScrollContainer.h"
#include "nsFieldSetFrame.h"
#include "nsInlineFrame.h"
#include "nsBlockFrame.h"
#include "nsCanvasFrame.h"
#include "nsFirstLetterFrame.h"
#include "nsGfxScrollFrame.h"
#include "nsPageFrame.h"
#include "nsSimplePageSequenceFrame.h"
#include "nsTableOuterFrame.h"
#include "nsIScrollableFrame.h"
#ifdef MOZ_XUL
#include "nsIRootBox.h"
#endif
#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif
#include "nsXBLService.h"
#undef NOISY_FIRST_LETTER
#include "nsMathMLParts.h"
#include "mozilla/dom/SVGTests.h"
#include "nsSVGUtils.h"
#include "nsRefreshDriver.h"
#include "nsRuleProcessorData.h"
#include "nsTextNode.h"
#include "ActiveLayerTracker.h"
using namespace mozilla;
using namespace mozilla::dom;
// An alias for convenience.
static const nsIFrame::ChildListID kPrincipalList = nsIFrame::kPrincipalList;
nsIFrame*
NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewHTMLVideoFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewSVGOuterSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewSVGOuterSVGAnonChildFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGPathGeometryFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGGenericContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewSVGForeignObjectFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGTextFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
extern nsIFrame*
NS_NewSVGLinearGradientFrame(nsIPresShell *aPresShell, nsStyleContext* aContext);
extern nsIFrame*
NS_NewSVGRadialGradientFrame(nsIPresShell *aPresShell, nsStyleContext* aContext);
extern nsIFrame*
NS_NewSVGStopFrame(nsIPresShell *aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
extern nsIFrame*
NS_NewSVGImageFrame(nsIPresShell *aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGFilterFrame(nsIPresShell *aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGPatternFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSVGFEUnstyledLeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
#include "mozilla/dom/NodeInfo.h"
#include "prenv.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#ifdef DEBUG
// Set the environment variable GECKO_FRAMECTOR_DEBUG_FLAGS to one or
// more of the following flags (comma separated) for handy debug
// output.
static bool gNoisyContentUpdates = false;
static bool gReallyNoisyContentUpdates = false;
static bool gNoisyInlineConstruction = false;
struct FrameCtorDebugFlags {
const char* name;
bool* on;
};
static FrameCtorDebugFlags gFlags[] = {
{ "content-updates", &gNoisyContentUpdates },
{ "really-noisy-content-updates", &gReallyNoisyContentUpdates },
{ "noisy-inline", &gNoisyInlineConstruction }
};
#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
#endif
#ifdef MOZ_XUL
#include "nsMenuFrame.h"
#include "nsPopupSetFrame.h"
#include "nsTreeColFrame.h"
#include "nsIBoxObject.h"
#include "nsPIListBoxObject.h"
#include "nsListBoxBodyFrame.h"
#include "nsListItemFrame.h"
#include "nsXULLabelFrame.h"
//------------------------------------------------------------------
nsIFrame*
NS_NewAutoRepeatBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewRootBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsContainerFrame*
NS_NewDocElementBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewThumbFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewDeckFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewLeafBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewStackFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewProgressMeterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewRangeFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewImageBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewTextBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewGroupBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewButtonBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewSplitterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewMenuPopupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewPopupSetFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewMenuFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, uint32_t aFlags);
nsIFrame*
NS_NewMenuBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewTreeBodyFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
// grid
nsresult
NS_NewGridLayout2 ( nsIPresShell* aPresShell, nsBoxLayout** aNewLayout );
nsIFrame*
NS_NewGridRowLeafFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewGridRowGroupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
// end grid
nsIFrame*
NS_NewTitleBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewResizerFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
#endif
nsHTMLScrollFrame*
NS_NewHTMLScrollFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot);
nsXULScrollFrame*
NS_NewXULScrollFrame(nsIPresShell* aPresShell, nsStyleContext* aContext,
bool aIsRoot, bool aClipAllDescendants);
nsIFrame*
NS_NewSliderFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewScrollbarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
nsIFrame*
NS_NewScrollbarButtonFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
#ifdef NOISY_FINDFRAME
static int32_t FFWC_totalCount=0;
static int32_t FFWC_doLoop=0;
static int32_t FFWC_doSibling=0;
static int32_t FFWC_recursions=0;
static int32_t FFWC_nextInFlows=0;
#endif
// Returns true if aFrame is an anonymous flex/grid item.
static inline bool
IsAnonymousFlexOrGridItem(const nsIFrame* aFrame)
{
const nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo();
return pseudoType == nsCSSAnonBoxes::anonymousFlexItem ||
pseudoType == nsCSSAnonBoxes::anonymousGridItem;
}
// Returns true if aFrame is a flex/grid container.
static inline bool
IsFlexOrGridContainer(const nsIFrame* aFrame)
{
const nsIAtom* t = aFrame->GetType();
return t == nsGkAtoms::flexContainerFrame ||
t == nsGkAtoms::gridContainerFrame;
}
#if DEBUG
static void
AssertAnonymousFlexOrGridItemParent(const nsIFrame* aChild,
const nsIFrame* aParent)
{
MOZ_ASSERT(IsAnonymousFlexOrGridItem(aChild),
"expected an anonymous flex or grid item child frame");
MOZ_ASSERT(aParent, "expected a parent frame");
const nsIAtom* pseudoType = aChild->StyleContext()->GetPseudo();
if (pseudoType == nsCSSAnonBoxes::anonymousFlexItem) {
MOZ_ASSERT(aParent->GetType() == nsGkAtoms::flexContainerFrame,
"anonymous flex items should only exist as children "
"of flex container frames");
} else {
MOZ_ASSERT(aParent->GetType() == nsGkAtoms::gridContainerFrame,
"anonymous grid items should only exist as children "
"of grid container frames");
}
}
#else
#define AssertAnonymousFlexOrGridItemParent(x, y) do { /* nothing */ } while(0)
#endif
static inline nsContainerFrame*
GetFieldSetBlockFrame(nsIFrame* aFieldsetFrame)
{
// Depends on the fieldset child frame order - see ConstructFieldSetFrame() below.
nsIFrame* firstChild = aFieldsetFrame->GetFirstPrincipalChild();
nsIFrame* inner = firstChild && firstChild->GetNextSibling() ? firstChild->GetNextSibling() : firstChild;
return inner ? inner->GetContentInsertionFrame() : nullptr;
}
#define FCDATA_DECL(_flags, _func) \
{ _flags, { (FrameCreationFunc)_func }, nullptr, nullptr }
#define FCDATA_WITH_WRAPPING_BLOCK(_flags, _func, _anon_box) \
{ _flags | FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS, \
{ (FrameCreationFunc)_func }, nullptr, &_anon_box }
//----------------------------------------------------------------------
/**
* True if aFrame is an actual inline frame in the sense of non-replaced
* display:inline CSS boxes. In other words, it can be affected by {ib}
* splitting and can contain first-letter frames. Basically, this is either an
* inline frame (positioned or otherwise) or an line frame (this last because
* it can contain first-letter and because inserting blocks in the middle of it
* needs to terminate it).
*/
static bool
IsInlineFrame(const nsIFrame* aFrame)
{
return aFrame->IsFrameOfType(nsIFrame::eLineParticipant);
}
/**
* True if aFrame is an instance of an SVG frame class or is an inline/block
* frame being used for SVG text.
*/
static bool
IsFrameForSVG(const nsIFrame* aFrame)
{
return aFrame->IsFrameOfType(nsIFrame::eSVG) ||
aFrame->IsSVGText();
}
/**
* Returns true iff aFrame explicitly prevents its descendants from floating
* (at least, down to the level of descendants which themselves are
* float-containing blocks -- those will manage the floating status of any
* lower-level descendents inside them, of course).
*/
static bool
ShouldSuppressFloatingOfDescendants(nsIFrame* aFrame)
{
return aFrame->IsFrameOfType(nsIFrame::eMathML) ||
aFrame->IsBoxFrame() ||
::IsFlexOrGridContainer(aFrame);
}
/**
* If any children require a block parent, return the first such child.
* Otherwise return null.
*/
static nsIContent*
AnyKidsNeedBlockParent(nsIFrame *aFrameList)
{
for (nsIFrame *k = aFrameList; k; k = k->GetNextSibling()) {
// Line participants, such as text and inline frames, can't be
// directly inside a XUL box; they must be wrapped in an
// intermediate block.
if (k->IsFrameOfType(nsIFrame::eLineParticipant)) {
return k->GetContent();
}
}
return nullptr;
}
// Reparent a frame into a wrapper frame that is a child of its old parent.
static void
ReparentFrame(RestyleManager* aRestyleManager,
nsContainerFrame* aNewParentFrame,
nsIFrame* aFrame)
{
aFrame->SetParent(aNewParentFrame);
aRestyleManager->ReparentStyleContext(aFrame);
}
static void
ReparentFrames(nsCSSFrameConstructor* aFrameConstructor,
nsContainerFrame* aNewParentFrame,
const nsFrameList& aFrameList)
{
RestyleManager* restyleManager = aFrameConstructor->RestyleManager();
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
ReparentFrame(restyleManager, aNewParentFrame, e.get());
}
}
//----------------------------------------------------------------------
//
// When inline frames get weird and have block frames in them, we
// annotate them to help us respond to incremental content changes
// more easily.
static inline bool
IsFramePartOfIBSplit(nsIFrame* aFrame)
{
return (aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) != 0;
}
static nsContainerFrame* GetIBSplitSibling(nsIFrame* aFrame)
{
NS_PRECONDITION(IsFramePartOfIBSplit(aFrame), "Shouldn't call this");
// We only store the "ib-split sibling" annotation with the first
// frame in the continuation chain. Walk back to find that frame now.
return static_cast<nsContainerFrame*>
(aFrame->FirstContinuation()->
Properties().Get(nsIFrame::IBSplitSibling()));
}
static nsContainerFrame* GetIBSplitPrevSibling(nsIFrame* aFrame)
{
NS_PRECONDITION(IsFramePartOfIBSplit(aFrame), "Shouldn't call this");
// We only store the ib-split sibling annotation with the first
// frame in the continuation chain. Walk back to find that frame now.
return static_cast<nsContainerFrame*>
(aFrame->FirstContinuation()->
Properties().Get(nsIFrame::IBSplitPrevSibling()));
}
static nsContainerFrame*
GetLastIBSplitSibling(nsIFrame* aFrame, bool aReturnEmptyTrailingInline)
{
for (nsIFrame *frame = aFrame, *next; ; frame = next) {
next = GetIBSplitSibling(frame);
if (!next ||
(!aReturnEmptyTrailingInline && !next->GetFirstPrincipalChild() &&
!GetIBSplitSibling(next))) {
NS_ASSERTION(!next || !frame->IsInlineOutside(),
"Should have a block here!");
return static_cast<nsContainerFrame*>(frame);
}
}
NS_NOTREACHED("unreachable code");
return nullptr;
}
static void
SetFrameIsIBSplit(nsContainerFrame* aFrame, nsIFrame* aIBSplitSibling)
{
NS_PRECONDITION(aFrame, "bad args!");
// We should be the only continuation
NS_ASSERTION(!aFrame->GetPrevContinuation(),
"assigning ib-split sibling to other than first continuation!");
NS_ASSERTION(!aFrame->GetNextContinuation() ||
IsFramePartOfIBSplit(aFrame->GetNextContinuation()),
"should have no non-ib-split continuations here");
// Mark the frame as ib-split.
aFrame->AddStateBits(NS_FRAME_PART_OF_IBSPLIT);
if (aIBSplitSibling) {
NS_ASSERTION(!aIBSplitSibling->GetPrevContinuation(),
"assigning something other than the first continuation as the "
"ib-split sibling");
// Store the ib-split sibling (if we were given one) with the
// first frame in the flow.
FramePropertyTable* props = aFrame->PresContext()->PropertyTable();
props->Set(aFrame, nsIFrame::IBSplitSibling(), aIBSplitSibling);
props->Set(aIBSplitSibling, nsIFrame::IBSplitPrevSibling(), aFrame);
}
}
static nsIFrame*
GetIBContainingBlockFor(nsIFrame* aFrame)
{
NS_PRECONDITION(IsFramePartOfIBSplit(aFrame),
"GetIBContainingBlockFor() should only be called on known IB frames");
// Get the first "normal" ancestor of the target frame.
nsIFrame* parentFrame;
do {
parentFrame = aFrame->GetParent();
if (! parentFrame) {
NS_ERROR("no unsplit block frame in IB hierarchy");
return aFrame;
}
// Note that we ignore non-ib-split frames which have a pseudo on their
// style context -- they're not the frames we're looking for! In
// particular, they may be hiding a real parent that _is_ in an ib-split.
if (!IsFramePartOfIBSplit(parentFrame) &&
!parentFrame->StyleContext()->GetPseudo())
break;
aFrame = parentFrame;
} while (1);
// post-conditions
NS_ASSERTION(parentFrame, "no normal ancestor found for ib-split frame "
"in GetIBContainingBlockFor");
NS_ASSERTION(parentFrame != aFrame, "parentFrame is actually the child frame - bogus reslt");
return parentFrame;
}
//----------------------------------------------------------------------
// Block/inline frame construction logic. We maintain a few invariants here:
//
// 1. Block frames contain block and inline frames.
//
// 2. Inline frames only contain inline frames. If an inline parent has a block
// child then the block child is migrated upward until it lands in a block
// parent (the inline frames containing block is where it will end up).
// After this function returns, aLink is pointing to the first link at or
// after its starting position for which the next frame is a block. If there
// is no such link, it points to the end of the list.
static void
FindFirstBlock(nsFrameList::FrameLinkEnumerator& aLink)
{
for ( ; !aLink.AtEnd(); aLink.Next()) {
if (!aLink.NextFrame()->IsInlineOutside()) {
return;
}
}
}
// This function returns a frame link enumerator pointing to the first link in
// the list for which the next frame is not block. If there is no such link,
// it points to the end of the list.
static nsFrameList::FrameLinkEnumerator
FindFirstNonBlock(const nsFrameList& aList)
{
nsFrameList::FrameLinkEnumerator link(aList);
for (; !link.AtEnd(); link.Next()) {
if (link.NextFrame()->IsInlineOutside()) {
break;
}
}
return link;
}
inline void
SetInitialSingleChild(nsContainerFrame* aParent, nsIFrame* aFrame)
{
NS_PRECONDITION(!aFrame->GetNextSibling(), "Should be using a frame list");
nsFrameList temp(aFrame, aFrame);
aParent->SetInitialChildList(kPrincipalList, temp);
}
static nsContainerFrame*
GetContentInsertionFrameFor(nsIContent* aContent)
{
// Get the primary frame associated with the content
nsIFrame* frame = aContent->GetPrimaryFrame();
if (!frame)
return nullptr;
// If the content of the frame is not the desired content then this is not
// really a frame for the desired content.
// XXX This check is needed due to bug 135040. Remove it once that's fixed.
if (frame->GetContent() != aContent) {
return nullptr;
}
nsContainerFrame* insertionFrame = frame->GetContentInsertionFrame();
NS_ASSERTION(!insertionFrame || insertionFrame == frame || !frame->IsLeaf(),
"The insertion frame is the primary frame or the primary frame isn't a leaf");
return insertionFrame;
}
// -----------------------------------------------------------
// Structure used when constructing formatting object trees.
struct nsFrameItems : public nsFrameList
{
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
void
nsFrameItems::AddChild(nsIFrame* aChild)
{
NS_PRECONDITION(aChild, "nsFrameItems::AddChild");
// It'd be really nice if we could just AppendFrames(kPrincipalList, aChild) here,
// but some of our callers put frames that have different
// parents (caption, I'm looking at you) on the same framelist, and
// nsFrameList asserts if you try to do that.
if (IsEmpty()) {
SetFrames(aChild);
}
else {
NS_ASSERTION(aChild != mLastChild,
"Same frame being added to frame list twice?");
mLastChild->SetNextSibling(aChild);
mLastChild = nsLayoutUtils::GetLastSibling(aChild);
}
}
// -----------------------------------------------------------
// Structure used when constructing formatting object trees. Contains
// state information needed for absolutely positioned elements
struct nsAbsoluteItems : nsFrameItems {
// containing block for absolutely positioned elements
nsContainerFrame* containingBlock;
nsAbsoluteItems(nsContainerFrame* aContainingBlock);
#ifdef DEBUG
// XXXbz Does this need a debug-only assignment operator that nulls out the
// childList in the nsAbsoluteItems we're copying? Introducing a difference
// between debug and non-debug behavior seems bad, so I guess not...
~nsAbsoluteItems() {
NS_ASSERTION(!FirstChild(),
"Dangling child list. Someone forgot to insert it?");
}
#endif
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
nsAbsoluteItems::nsAbsoluteItems(nsContainerFrame* aContainingBlock)
: containingBlock(aContainingBlock)
{
}
// Additional behavior is that it sets the frame's NS_FRAME_OUT_OF_FLOW flag
void
nsAbsoluteItems::AddChild(nsIFrame* aChild)
{
NS_ASSERTION(aChild->PresContext()->FrameManager()->
GetPlaceholderFrameFor(aChild),
"Child without placeholder being added to nsAbsoluteItems?");
aChild->AddStateBits(NS_FRAME_OUT_OF_FLOW);
nsFrameItems::AddChild(aChild);
}
// -----------------------------------------------------------
// Structure for saving the existing state when pushing/poping containing
// blocks. The destructor restores the state to its previous state
class MOZ_STACK_CLASS nsFrameConstructorSaveState {
public:
typedef nsIFrame::ChildListID ChildListID;
nsFrameConstructorSaveState();
~nsFrameConstructorSaveState();
private:
nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore
nsAbsoluteItems mSavedItems; // copy of original data
// The name of the child list in which our frames would belong
ChildListID mChildListID;
nsFrameConstructorState* mState;
// State used only when we're saving the abs-pos state for a transformed
// element.
nsAbsoluteItems mSavedFixedItems;
bool mSavedFixedPosIsAbsPos;
friend class nsFrameConstructorState;
};
// Structure used to keep track of a list of bindings we need to call
// AddToAttachedQueue on. These should be in post-order depth-first
// flattened tree traversal order.
struct PendingBinding : public LinkedListElement<PendingBinding>
{
#ifdef NS_BUILD_REFCNT_LOGGING
PendingBinding() {
MOZ_COUNT_CTOR(PendingBinding);
}
~PendingBinding() {
MOZ_COUNT_DTOR(PendingBinding);
}
#endif
nsRefPtr<nsXBLBinding> mBinding;
};
// Structure used for maintaining state information during the
// frame construction process
class MOZ_STACK_CLASS nsFrameConstructorState {
public:
typedef nsIFrame::ChildListID ChildListID;
nsPresContext *mPresContext;
nsIPresShell *mPresShell;
nsFrameManager *mFrameManager;
#ifdef MOZ_XUL
// Frames destined for the kPopupList.
nsAbsoluteItems mPopupItems;
#endif
// Containing block information for out-of-flow frames.
nsAbsoluteItems mFixedItems;
nsAbsoluteItems mAbsoluteItems;
nsAbsoluteItems mFloatedItems;
nsCOMPtr<nsILayoutHistoryState> mFrameState;
// These bits will be added to the state bits of any frame we construct
// using this state.
nsFrameState mAdditionalStateBits;
// When working with the -moz-transform property, we want to hook
// the abs-pos and fixed-pos lists together, since transformed
// elements are fixed-pos containing blocks. This flag determines
// whether or not we want to wire the fixed-pos and abs-pos lists
// together.
bool mFixedPosIsAbsPos;
// A boolean to indicate whether we have a "pending" popupgroup. That is, we
// have already created the FrameConstructionItem for the root popupgroup but
// we have not yet created the relevant frame.
bool mHavePendingPopupgroup;
// If false (which is the default) then call SetPrimaryFrame() as needed
// during frame construction. If true, don't make any SetPrimaryFrame()
// calls, except for generated content which doesn't have a primary frame
// yet. The mCreatingExtraFrames == true mode is meant to be used for
// construction of random "extra" frames for elements via normal frame
// construction APIs (e.g. replication of things across pages in paginated
// mode).
bool mCreatingExtraFrames;
nsCOMArray<nsIContent> mGeneratedTextNodesWithInitializer;
TreeMatchContext mTreeMatchContext;
// Constructor
// Use the passed-in history state.
nsFrameConstructorState(nsIPresShell* aPresShell,
nsContainerFrame* aFixedContainingBlock,
nsContainerFrame* aAbsoluteContainingBlock,
nsContainerFrame* aFloatContainingBlock,
nsILayoutHistoryState* aHistoryState);
// Get the history state from the pres context's pres shell.
nsFrameConstructorState(nsIPresShell* aPresShell,
nsContainerFrame* aFixedContainingBlock,
nsContainerFrame* aAbsoluteContainingBlock,
nsContainerFrame* aFloatContainingBlock);
~nsFrameConstructorState();
// Function to push the existing absolute containing block state and
// create a new scope. Code that uses this function should get matching
// logic in GetAbsoluteContainingBlock.
// Also makes aNewAbsoluteContainingBlock the containing block for
// fixed-pos elements if necessary.
// aPositionedFrame is the frame whose style actually makes
// aNewAbsoluteContainingBlock a containing block. E.g. for a scrollable element
// aPositionedFrame is the element's primary frame and
// aNewAbsoluteContainingBlock is the scrolled frame.
void PushAbsoluteContainingBlock(nsContainerFrame* aNewAbsoluteContainingBlock,
nsIFrame* aPositionedFrame,
nsFrameConstructorSaveState& aSaveState);
// Function to push the existing float containing block state and
// create a new scope. Code that uses this function should get matching
// logic in GetFloatContainingBlock.
// Pushing a null float containing block forbids any frames from being
// floated until a new float containing block is pushed.
// XXX we should get rid of null float containing blocks and teach the
// various frame classes to deal with floats instead.
void PushFloatContainingBlock(nsContainerFrame* aNewFloatContainingBlock,
nsFrameConstructorSaveState& aSaveState);
// Function to return the proper geometric parent for a frame with display
// struct given by aStyleDisplay and parent's frame given by
// aContentParentFrame.
nsContainerFrame* GetGeometricParent(const nsStyleDisplay* aStyleDisplay,
nsContainerFrame* aContentParentFrame) const;
/**
* Function to add a new frame to the right frame list. This MUST be called
* on frames before their children have been processed if the frames might
* conceivably be out-of-flow; otherwise cleanup in error cases won't work
* right. Also, this MUST be called on frames after they have been
* initialized.
* @param aNewFrame the frame to add
* @param aFrameItems the list to add in-flow frames to
* @param aContent the content pointer for aNewFrame
* @param aStyleContext the style context resolved for aContent
* @param aParentFrame the parent frame for the content if it were in-flow
* @param aCanBePositioned pass false if the frame isn't allowed to be
* positioned
* @param aCanBeFloated pass false if the frame isn't allowed to be
* floated
* @param aIsOutOfFlowPopup pass true if the frame is an out-of-flow popup
* (XUL-only)
*/
void AddChild(nsIFrame* aNewFrame,
nsFrameItems& aFrameItems,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsContainerFrame* aParentFrame,
bool aCanBePositioned = true,
bool aCanBeFloated = true,
bool aIsOutOfFlowPopup = false,
bool aInsertAfter = false,
nsIFrame* aInsertAfterFrame = nullptr);
/**
* Function to return the fixed-pos element list. Normally this will just hand back the
* fixed-pos element list, but in case we're dealing with a transformed element that's
* acting as an abs-pos and fixed-pos container, we'll hand back the abs-pos list. Callers should
* use this function if they want to get the list acting as the fixed-pos item parent.
*/
nsAbsoluteItems& GetFixedItems()
{
return mFixedPosIsAbsPos ? mAbsoluteItems : mFixedItems;
}
const nsAbsoluteItems& GetFixedItems() const
{
return mFixedPosIsAbsPos ? mAbsoluteItems : mFixedItems;
}
/**
* class to automatically push and pop a pending binding in the frame
* constructor state. See nsCSSFrameConstructor::FrameConstructionItem
* mPendingBinding documentation.
*/
class PendingBindingAutoPusher;
friend class PendingBindingAutoPusher;
class MOZ_STACK_CLASS PendingBindingAutoPusher {
public:
PendingBindingAutoPusher(nsFrameConstructorState& aState,
PendingBinding* aPendingBinding) :
mState(aState),
mPendingBinding(aState.mCurrentPendingBindingInsertionPoint)
{
if (aPendingBinding) {
aState.mCurrentPendingBindingInsertionPoint = aPendingBinding;
}
}
~PendingBindingAutoPusher()
{
mState.mCurrentPendingBindingInsertionPoint = mPendingBinding;
}
private:
nsFrameConstructorState& mState;
PendingBinding* mPendingBinding;
};
/**
* Add a new pending binding to the list
*/
void AddPendingBinding(PendingBinding* aPendingBinding) {
if (mCurrentPendingBindingInsertionPoint) {
mCurrentPendingBindingInsertionPoint->setPrevious(aPendingBinding);
} else {
mPendingBindings.insertBack(aPendingBinding);
}
}
protected:
friend class nsFrameConstructorSaveState;
/**
* ProcessFrameInsertions takes the frames in aFrameItems and adds them as
* kids to the aChildListID child list of |aFrameItems.containingBlock|.
*/
void ProcessFrameInsertions(nsAbsoluteItems& aFrameItems,
ChildListID aChildListID);
// Our list of all pending bindings. When we're done, we need to call
// AddToAttachedQueue on all of them, in order.
LinkedList<PendingBinding> mPendingBindings;
PendingBinding* mCurrentPendingBindingInsertionPoint;
};
nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell,
nsContainerFrame* aFixedContainingBlock,
nsContainerFrame* aAbsoluteContainingBlock,
nsContainerFrame* aFloatContainingBlock,
nsILayoutHistoryState* aHistoryState)
: mPresContext(aPresShell->GetPresContext()),
mPresShell(aPresShell),
mFrameManager(aPresShell->FrameManager()),
#ifdef MOZ_XUL
mPopupItems(nullptr),
#endif
mFixedItems(aFixedContainingBlock),
mAbsoluteItems(aAbsoluteContainingBlock),
mFloatedItems(aFloatContainingBlock),
// See PushAbsoluteContaningBlock below
mFrameState(aHistoryState),
mAdditionalStateBits(nsFrameState(0)),
// If the fixed-pos containing block is equal to the abs-pos containing
// block, use the abs-pos containing block's abs-pos list for fixed-pos
// frames.
mFixedPosIsAbsPos(aFixedContainingBlock == aAbsoluteContainingBlock),
mHavePendingPopupgroup(false),
mCreatingExtraFrames(false),
mTreeMatchContext(true, nsRuleWalker::eRelevantLinkUnvisited,
aPresShell->GetDocument()),
mCurrentPendingBindingInsertionPoint(nullptr)
{
#ifdef MOZ_XUL
nsIRootBox* rootBox = nsIRootBox::GetRootBox(aPresShell);
if (rootBox) {
mPopupItems.containingBlock = rootBox->GetPopupSetFrame();
}
#endif
MOZ_COUNT_CTOR(nsFrameConstructorState);
}
nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell,
nsContainerFrame* aFixedContainingBlock,
nsContainerFrame* aAbsoluteContainingBlock,
nsContainerFrame* aFloatContainingBlock)
: mPresContext(aPresShell->GetPresContext()),
mPresShell(aPresShell),
mFrameManager(aPresShell->FrameManager()),
#ifdef MOZ_XUL
mPopupItems(nullptr),
#endif
mFixedItems(aFixedContainingBlock),
mAbsoluteItems(aAbsoluteContainingBlock),
mFloatedItems(aFloatContainingBlock),
// See PushAbsoluteContaningBlock below
mAdditionalStateBits(nsFrameState(0)),
// If the fixed-pos containing block is equal to the abs-pos containing
// block, use the abs-pos containing block's abs-pos list for fixed-pos
// frames.
mFixedPosIsAbsPos(aFixedContainingBlock == aAbsoluteContainingBlock),
mHavePendingPopupgroup(false),
mCreatingExtraFrames(false),
mTreeMatchContext(true, nsRuleWalker::eRelevantLinkUnvisited,
aPresShell->GetDocument()),
mCurrentPendingBindingInsertionPoint(nullptr)