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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsFieldSetFrame.h"
#include "mozilla/dom/HTMLLegendElement.h"
#include <algorithm>
#include "gfxContext.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/Likely.h"
#include "mozilla/PresShell.h"
#include "mozilla/Maybe.h"
#include "mozilla/webrender/WebRenderAPI.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSFrameConstructor.h"
#include "nsCSSRendering.h"
#include "nsDisplayList.h"
#include "nsGkAtoms.h"
#include "nsIFrameInlines.h"
#include "nsLayoutUtils.h"
#include "nsLegendFrame.h"
#include "nsStyleConsts.h"
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::layout;
nsContainerFrame* NS_NewFieldSetFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell) nsFieldSetFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsFieldSetFrame)
NS_QUERYFRAME_HEAD(nsFieldSetFrame)
NS_QUERYFRAME_ENTRY(nsFieldSetFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
nsFieldSetFrame::nsFieldSetFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID),
mLegendRect(GetWritingMode()) {
mLegendSpace = 0;
}
nsRect nsFieldSetFrame::VisualBorderRectRelativeToSelf() const {
WritingMode wm = GetWritingMode();
LogicalRect r(wm, LogicalPoint(wm, 0, 0), GetLogicalSize(wm));
nsSize containerSize = r.Size(wm).GetPhysicalSize(wm);
nsIFrame* legend = GetLegend();
if (legend && !GetPrevInFlow()) {
nscoord legendSize = legend->GetLogicalSize(wm).BSize(wm);
auto legendMargin = legend->GetLogicalUsedMargin(wm);
nscoord legendStartMargin = legendMargin.BStart(wm);
nscoord legendEndMargin = legendMargin.BEnd(wm);
nscoord border = GetUsedBorder().Side(wm.PhysicalSide(eLogicalSideBStart));
// Calculate the offset from the border area block-axis start edge needed to
// center-align our border with the legend's border-box (in the block-axis).
nscoord off = (legendStartMargin + legendSize / 2) - border / 2;
// We don't want to display our border above our border area.
if (off > nscoord(0)) {
nscoord marginBoxSize = legendStartMargin + legendSize + legendEndMargin;
if (marginBoxSize > border) {
// We don't want to display our border below the legend's margin-box,
// so we align it to the block-axis end if that happens.
nscoord overflow = off + border - marginBoxSize;
if (overflow > nscoord(0)) {
off -= overflow;
}
r.BStart(wm) += off;
r.BSize(wm) -= off;
}
}
}
return r.GetPhysicalRect(wm, containerSize);
}
nsContainerFrame* nsFieldSetFrame::GetInner() const {
for (nsIFrame* child : mFrames) {
if (child->Style()->GetPseudoType() == PseudoStyleType::fieldsetContent) {
return static_cast<nsContainerFrame*>(child);
}
}
return nullptr;
}
nsIFrame* nsFieldSetFrame::GetLegend() const {
for (nsIFrame* child : mFrames) {
if (child->Style()->GetPseudoType() != PseudoStyleType::fieldsetContent) {
return child;
}
}
return nullptr;
}
class nsDisplayFieldSetBorder final : public nsPaintedDisplayItem {
public:
nsDisplayFieldSetBorder(nsDisplayListBuilder* aBuilder,
nsFieldSetFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayFieldSetBorder);
}
MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayFieldSetBorder)
virtual void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
virtual nsDisplayItemGeometry* AllocateGeometry(
nsDisplayListBuilder* aBuilder) override;
virtual void ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const override;
bool CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) override;
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const override;
NS_DISPLAY_DECL_NAME("FieldSetBorder", TYPE_FIELDSET_BORDER_BACKGROUND)
};
void nsDisplayFieldSetBorder::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
image::ImgDrawResult result =
static_cast<nsFieldSetFrame*>(mFrame)->PaintBorder(
aBuilder, *aCtx, ToReferenceFrame(), GetPaintRect());
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}
nsDisplayItemGeometry* nsDisplayFieldSetBorder::AllocateGeometry(
nsDisplayListBuilder* aBuilder) {
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void nsDisplayFieldSetBorder::ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const {
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
nsRect nsDisplayFieldSetBorder::GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const {
// Just go ahead and claim our frame's overflow rect as the bounds, because we
// may have border-image-outset or other features that cause borders to extend
// outside the border rect. We could try to duplicate all the complexity
// nsDisplayBorder has here, but keeping things in sync would be a pain, and
// this code is not typically performance-sensitive.
*aSnap = false;
return Frame()->InkOverflowRectRelativeToSelf() + ToReferenceFrame();
}
bool nsDisplayFieldSetBorder::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) {
auto frame = static_cast<nsFieldSetFrame*>(mFrame);
auto offset = ToReferenceFrame();
nsRect rect;
Maybe<wr::SpaceAndClipChainHelper> clipOut;
if (nsIFrame* legend = frame->GetLegend()) {
rect = frame->VisualBorderRectRelativeToSelf() + offset;
nsRect legendRect = legend->GetNormalRect() + offset;
// Make sure we clip all of the border in case the legend is smaller.
nscoord borderTopWidth = frame->GetUsedBorder().top;
if (legendRect.height < borderTopWidth) {
legendRect.height = borderTopWidth;
legendRect.y = offset.y;
}
if (!legendRect.IsEmpty()) {
// We need to clip out the part of the border where the legend would go
auto appUnitsPerDevPixel = frame->PresContext()->AppUnitsPerDevPixel();
auto layoutRect = wr::ToLayoutRect(LayoutDeviceRect::FromAppUnits(
frame->InkOverflowRectRelativeToSelf() + offset,
appUnitsPerDevPixel));
wr::ComplexClipRegion region;
region.rect = wr::ToLayoutRect(
LayoutDeviceRect::FromAppUnits(legendRect, appUnitsPerDevPixel));
region.mode = wr::ClipMode::ClipOut;
region.radii = wr::EmptyBorderRadius();
nsTArray<mozilla::wr::ComplexClipRegion> array{region};
auto clip = aBuilder.DefineClip(Nothing(), layoutRect, &array);
auto clipChain = aBuilder.DefineClipChain({clip}, true);
clipOut.emplace(aBuilder, clipChain);
}
} else {
rect = nsRect(offset, frame->GetRect().Size());
}
ImgDrawResult drawResult = nsCSSRendering::CreateWebRenderCommandsForBorder(
this, mFrame, rect, aBuilder, aResources, aSc, aManager,
aDisplayListBuilder);
if (drawResult == ImgDrawResult::NOT_SUPPORTED) {
return false;
}
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, drawResult);
return true;
};
void nsFieldSetFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
// Paint our background and border in a special way.
// REVIEW: We don't really need to check frame emptiness here; if it's empty,
// the background/border display item won't do anything, and if it isn't
// empty, we need to paint the outline
if (!HasAnyStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER) &&
IsVisibleForPainting()) {
DisplayOutsetBoxShadowUnconditional(aBuilder, aLists.BorderBackground());
const nsRect rect =
VisualBorderRectRelativeToSelf() + aBuilder->ToReferenceFrame(this);
nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
aBuilder, this, rect, aLists.BorderBackground(),
/* aAllowWillPaintBorderOptimization = */ false);
aLists.BorderBackground()->AppendNewToTop<nsDisplayFieldSetBorder>(aBuilder,
this);
DisplayOutlineUnconditional(aBuilder, aLists);
DO_GLOBAL_REFLOW_COUNT_DSP("nsFieldSetFrame");
}
if (GetPrevInFlow()) {
DisplayOverflowContainers(aBuilder, aLists);
}
nsDisplayListCollection contentDisplayItems(aBuilder);
if (nsIFrame* inner = GetInner()) {
// Collect the inner frame's display items into their own collection.
// We need to be calling BuildDisplayList on it before the legend in
// case it contains out-of-flow frames whose placeholders are in the
// legend. However, we want the inner frame's display items to be
// after the legend's display items in z-order, so we need to save them
// and append them later.
BuildDisplayListForChild(aBuilder, inner, contentDisplayItems);
}
if (nsIFrame* legend = GetLegend()) {
// The legend's background goes on our BlockBorderBackgrounds list because
// it's a block child.
nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
BuildDisplayListForChild(aBuilder, legend, set);
}
// Put the inner frame's display items on the master list. Note that this
// moves its border/background display items to our BorderBackground() list,
// which isn't really correct, but it's OK because the inner frame is
// anonymous and can't have its own border and background.
contentDisplayItems.MoveTo(aLists);
}
image::ImgDrawResult nsFieldSetFrame::PaintBorder(
nsDisplayListBuilder* aBuilder, gfxContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect) {
// If the border is smaller than the legend, move the border down
// to be centered on the legend. We call VisualBorderRectRelativeToSelf() to
// compute the border positioning.
// FIXME: This means border-radius clamping is incorrect; we should
// override nsIFrame::GetBorderRadii.
nsRect rect = VisualBorderRectRelativeToSelf() + aPt;
nsPresContext* presContext = PresContext();
const auto skipSides = GetSkipSides();
PaintBorderFlags borderFlags = aBuilder->ShouldSyncDecodeImages()
? PaintBorderFlags::SyncDecodeImages
: PaintBorderFlags();
ImgDrawResult result = ImgDrawResult::SUCCESS;
nsCSSRendering::PaintBoxShadowInner(presContext, aRenderingContext, this,
rect);
if (nsIFrame* legend = GetLegend()) {
// We want to avoid drawing our border under the legend, so clip out the
// legend while drawing our border. We don't want to use mLegendRect here,
// because we do want to draw our border under the legend's inline-start and
// -end margins. And we use GetNormalRect(), not GetRect(), because we do
// not want relative positioning applied to the legend to change how our
// border looks.
nsRect legendRect = legend->GetNormalRect() + aPt;
// Make sure we clip all of the border in case the legend is smaller.
nscoord borderTopWidth = GetUsedBorder().top;
if (legendRect.height < borderTopWidth) {
legendRect.height = borderTopWidth;
legendRect.y = aPt.y;
}
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
// We set up a clip path which has our rect clockwise and the legend rect
// counterclockwise, with FILL_WINDING as the fill rule. That will allow us
// to paint within our rect but outside the legend rect. For "our rect" we
// use our ink overflow rect (relative to ourselves, so it's not affected
// by transforms), because we can have borders sticking outside our border
// box (e.g. due to border-image-outset).
RefPtr<PathBuilder> pathBuilder =
drawTarget->CreatePathBuilder(FillRule::FILL_WINDING);
int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
AppendRectToPath(pathBuilder,
NSRectToSnappedRect(InkOverflowRectRelativeToSelf() + aPt,
appUnitsPerDevPixel, *drawTarget),
true);
AppendRectToPath(
pathBuilder,
NSRectToSnappedRect(legendRect, appUnitsPerDevPixel, *drawTarget),
false);
RefPtr<Path> clipPath = pathBuilder->Finish();
aRenderingContext.Save();
aRenderingContext.Clip(clipPath);
result &= nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
aDirtyRect, rect, mComputedStyle,
borderFlags, skipSides);
aRenderingContext.Restore();
} else {
result &= nsCSSRendering::PaintBorder(
presContext, aRenderingContext, this, aDirtyRect,
nsRect(aPt, mRect.Size()), mComputedStyle, borderFlags, skipSides);
}
return result;
}
nscoord nsFieldSetFrame::GetIntrinsicISize(gfxContext* aRenderingContext,
IntrinsicISizeType aType) {
nscoord legendWidth = 0;
nscoord contentWidth = 0;
if (!StyleDisplay()->IsContainSize()) {
// Both inner and legend are children, and if the fieldset is
// size-contained they should not contribute to the intrinsic size.
if (nsIFrame* legend = GetLegend()) {
legendWidth = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
legend, aType);
}
if (nsIFrame* inner = GetInner()) {
// Ignore padding on the inner, since the padding will be applied to the
// outer instead, and the padding computed for the inner is wrong
// for percentage padding.
contentWidth = nsLayoutUtils::IntrinsicForContainer(
aRenderingContext, inner, aType, nsLayoutUtils::IGNORE_PADDING);
}
}
return std::max(legendWidth, contentWidth);
}
nscoord nsFieldSetFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_MIN_INLINE_SIZE(this, result);
result = GetIntrinsicISize(aRenderingContext, IntrinsicISizeType::MinISize);
return result;
}
nscoord nsFieldSetFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_PREF_INLINE_SIZE(this, result);
result = GetIntrinsicISize(aRenderingContext, IntrinsicISizeType::PrefISize);
return result;
}
/* virtual */
void nsFieldSetFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
using LegendAlignValue = mozilla::dom::HTMLLegendElement::LegendAlignValue;
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsFieldSetFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_WARNING_ASSERTION(aReflowInput.ComputedISize() != NS_UNCONSTRAINEDSIZE,
"Should have a precomputed inline-size!");
OverflowAreas ocBounds;
nsReflowStatus ocStatus;
auto* prevInFlow = static_cast<nsFieldSetFrame*>(GetPrevInFlow());
if (prevInFlow) {
ReflowOverflowContainerChildren(aPresContext, aReflowInput, ocBounds,
ReflowChildFlags::Default, ocStatus);
AutoFrameListPtr prevOverflowFrames(PresContext(),
prevInFlow->StealOverflowFrames());
if (prevOverflowFrames) {
nsContainerFrame::ReparentFrameViewList(*prevOverflowFrames, prevInFlow,
this);
mFrames.InsertFrames(this, nullptr, *prevOverflowFrames);
}
}
bool reflowInner;
bool reflowLegend;
nsIFrame* legend = GetLegend();
nsContainerFrame* inner = GetInner();
if (!legend || !inner) {
if (DrainSelfOverflowList()) {
legend = GetLegend();
inner = GetInner();
}
}
if (aReflowInput.ShouldReflowAllKids() || GetNextInFlow()) {
reflowInner = inner != nullptr;
reflowLegend = legend != nullptr;
} else {
reflowInner = inner && inner->IsSubtreeDirty();
reflowLegend = legend && legend->IsSubtreeDirty();
}
// @note |this| frame applies borders but not any padding. Our anonymous
// inner frame applies the padding (but not borders).
const auto wm = GetWritingMode();
LogicalMargin border = aReflowInput.ComputedLogicalBorderPadding(wm) -
aReflowInput.ComputedLogicalPadding(wm);
auto skipSides = PreReflowBlockLevelLogicalSkipSides();
border.ApplySkipSides(skipSides);
LogicalSize availSize(wm, aReflowInput.ComputedSize().ISize(wm),
aReflowInput.AvailableBSize());
// Figure out how big the legend is if there is one.
LogicalMargin legendMargin(wm);
Maybe<ReflowInput> legendReflowInput;
if (legend) {
const auto legendWM = legend->GetWritingMode();
LogicalSize legendAvailSize = availSize.ConvertTo(legendWM, wm);
legendReflowInput.emplace(aPresContext, aReflowInput, legend,
legendAvailSize);
}
const bool avoidBreakInside = ShouldAvoidBreakInside(aReflowInput);
if (reflowLegend) {
ReflowOutput legendDesiredSize(aReflowInput);
// We'll move the legend to its proper place later, so the position
// and containerSize passed here are unimportant.
const nsSize dummyContainerSize;
ReflowChild(legend, aPresContext, legendDesiredSize, *legendReflowInput, wm,
LogicalPoint(wm), dummyContainerSize,
ReflowChildFlags::NoMoveFrame, aStatus);
if (!prevInFlow && !aReflowInput.mFlags.mIsTopOfPage &&
aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE) {
// Propagate break-before from the legend to the fieldset.
if (legend->StyleDisplay()->BreakBefore() ||
aStatus.IsInlineBreakBefore()) {
// XXX(mats) setting a desired size shouldn't be necessary: bug 1599159.
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
// Honor break-inside:avoid by breaking before instead.
if (MOZ_UNLIKELY(avoidBreakInside) && !aStatus.IsFullyComplete()) {
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
}
// Calculate the legend's margin-box rectangle.
legendMargin = legend->GetLogicalUsedMargin(wm);
mLegendRect = LogicalRect(
wm, 0, 0, legendDesiredSize.ISize(wm) + legendMargin.IStartEnd(wm),
legendDesiredSize.BSize(wm) + legendMargin.BStartEnd(wm));
// We subtract mLegendSpace from inner's content-box block-size below.
nscoord oldSpace = mLegendSpace;
mLegendSpace = 0;
nscoord borderBStart = border.BStart(wm);
if (!prevInFlow) {
if (mLegendRect.BSize(wm) > borderBStart) {
mLegendSpace = mLegendRect.BSize(wm) - borderBStart;
} else {
// Calculate the border-box position that would center the legend's
// border-box within the fieldset border:
nscoord off = (borderBStart - legendDesiredSize.BSize(wm)) / 2;
off -= legendMargin.BStart(wm); // convert to a margin-box position
if (off > nscoord(0)) {
// Align the legend to the end if center-aligning it would overflow.
nscoord overflow = off + mLegendRect.BSize(wm) - borderBStart;
if (overflow > nscoord(0)) {
off -= overflow;
}
mLegendRect.BStart(wm) += off;
}
}
} else {
mLegendSpace = mLegendRect.BSize(wm);
}
// If mLegendSpace changes then we need to reflow |inner| as well.
if (mLegendSpace != oldSpace && inner) {
reflowInner = true;
}
FinishReflowChild(legend, aPresContext, legendDesiredSize,
legendReflowInput.ptr(), wm, LogicalPoint(wm),
dummyContainerSize, ReflowChildFlags::NoMoveFrame);
EnsureChildContinuation(legend, aStatus);
if (aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
!legend->GetWritingMode().IsOrthogonalTo(wm) &&
legend->StyleDisplay()->BreakAfter() &&
(!legendReflowInput->mFlags.mIsTopOfPage ||
mLegendRect.BSize(wm) > 0) &&
aStatus.IsComplete()) {
// Pretend that we ran out of space to push children of |inner|.
// XXX(mats) perhaps pushing the inner frame would be more correct,
// but we don't support that yet.
availSize.BSize(wm) = nscoord(0);
aStatus.Reset();
aStatus.SetIncomplete();
}
} else if (!legend) {
mLegendRect.SetEmpty();
mLegendSpace = 0;
} else {
// mLegendSpace and mLegendRect haven't changed, but we need
// the used margin when placing the legend.
legendMargin = legend->GetLogicalUsedMargin(wm);
}
// This containerSize is incomplete as yet: it does not include the size
// of the |inner| frame itself.
nsSize containerSize =
(LogicalSize(wm, 0, mLegendSpace) + border.Size(wm)).GetPhysicalSize(wm);
if (reflowInner) {
LogicalSize innerAvailSize = availSize;
innerAvailSize.ISize(wm) =
aReflowInput.ComputedSizeWithPadding(wm).ISize(wm);
nscoord remainingComputedBSize = aReflowInput.ComputedBSize();
if (prevInFlow && remainingComputedBSize != NS_UNCONSTRAINEDSIZE) {
// Subtract the consumed BSize associated with the legend.
for (nsIFrame* prev = prevInFlow; prev; prev = prev->GetPrevInFlow()) {
auto* prevFieldSet = static_cast<nsFieldSetFrame*>(prev);
remainingComputedBSize -= prevFieldSet->mLegendSpace;
}
remainingComputedBSize = std::max(0, remainingComputedBSize);
}
if (innerAvailSize.BSize(wm) != NS_UNCONSTRAINEDSIZE) {
innerAvailSize.BSize(wm) -=
std::max(mLegendRect.BSize(wm), border.BStart(wm));
if (StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone &&
(aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE ||
remainingComputedBSize +
aReflowInput.ComputedLogicalBorderPadding(wm).BStartEnd(
wm) >=
availSize.BSize(wm))) {
innerAvailSize.BSize(wm) -= border.BEnd(wm);
}
innerAvailSize.BSize(wm) = std::max(0, innerAvailSize.BSize(wm));
}
ReflowInput kidReflowInput(aPresContext, aReflowInput, inner,
innerAvailSize, Nothing(),
ReflowInput::InitFlag::CallerWillInit);
// Override computed padding, in case it's percentage padding
kidReflowInput.Init(
aPresContext, Nothing(), Nothing(),
Some(aReflowInput.ComputedLogicalPadding(inner->GetWritingMode())));
if (kidReflowInput.mFlags.mIsTopOfPage) {
// Prevent break-before from |inner| if we have a legend.
kidReflowInput.mFlags.mIsTopOfPage = !legend;
}
// Our child is "height:100%" but we actually want its height to be reduced
// by the amount of content-height the legend is eating up, unless our
// height is unconstrained (in which case the child's will be too).
if (aReflowInput.ComputedBSize() != NS_UNCONSTRAINEDSIZE) {
kidReflowInput.SetComputedBSize(
std::max(0, remainingComputedBSize - mLegendSpace));
}
if (aReflowInput.ComputedMinBSize() > 0) {
kidReflowInput.ComputedMinBSize() =
std::max(0, aReflowInput.ComputedMinBSize() - mLegendSpace);
}
if (aReflowInput.ComputedMaxBSize() != NS_UNCONSTRAINEDSIZE) {
kidReflowInput.ComputedMaxBSize() =
std::max(0, aReflowInput.ComputedMaxBSize() - mLegendSpace);
}
ReflowOutput kidDesiredSize(kidReflowInput);
NS_ASSERTION(
kidReflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0),
"Margins on anonymous fieldset child not supported!");
LogicalPoint pt(wm, border.IStart(wm), border.BStart(wm) + mLegendSpace);
// We don't know the correct containerSize until we have reflowed |inner|,
// so we use a dummy value for now; FinishReflowChild will fix the position
// if necessary.
const nsSize dummyContainerSize;
nsReflowStatus status;
// If our legend needs a continuation then *this* frame will have
// a continuation as well so we should keep our inner frame continuations
// too (even if 'inner' ends up being COMPLETE here). This ensures that
// our continuation will have a reasonable inline-size.
ReflowChildFlags flags = aStatus.IsFullyComplete()
? ReflowChildFlags::Default
: ReflowChildFlags::NoDeleteNextInFlowChild;
ReflowChild(inner, aPresContext, kidDesiredSize, kidReflowInput, wm, pt,
dummyContainerSize, flags, status);
// Honor break-inside:avoid when possible by returning a BreakBefore status.
if (MOZ_UNLIKELY(avoidBreakInside) && !prevInFlow &&
!aReflowInput.mFlags.mIsTopOfPage &&
availSize.BSize(wm) != NS_UNCONSTRAINEDSIZE) {
if (status.IsInlineBreakBefore() || !status.IsFullyComplete()) {
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
}
// Update containerSize to account for size of the inner frame, so that
// FinishReflowChild can position it correctly.
containerSize += kidDesiredSize.PhysicalSize();
FinishReflowChild(inner, aPresContext, kidDesiredSize, &kidReflowInput, wm,
pt, containerSize, ReflowChildFlags::Default);
EnsureChildContinuation(inner, status);
aStatus.MergeCompletionStatusFrom(status);
NS_FRAME_TRACE_REFLOW_OUT("FieldSet::Reflow", aStatus);
} else if (inner) {
// |inner| didn't need to be reflowed but we do need to include its size
// in containerSize.
containerSize += inner->GetSize();
} else {
// No |inner| means it was already complete in an earlier continuation.
MOZ_ASSERT(prevInFlow, "first-in-flow should always have an inner frame");
for (nsIFrame* prev = prevInFlow; prev; prev = prev->GetPrevInFlow()) {
auto* prevFieldSet = static_cast<nsFieldSetFrame*>(prev);
if (auto* prevInner = prevFieldSet->GetInner()) {
containerSize += prevInner->GetSize();
break;
}
}
}
LogicalRect contentRect(wm);
if (inner) {
// We don't support margins on inner, so our content rect is just the
// inner's border-box. (We don't really care about container size at this
// point, as we'll figure out the actual positioning later.)
contentRect = inner->GetLogicalRect(wm, containerSize);
} else if (prevInFlow) {
auto size = prevInFlow->GetPaddingRectRelativeToSelf().Size();
contentRect.ISize(wm) = wm.IsVertical() ? size.height : size.width;
}
if (legend) {
// The legend is positioned inline-wards within the inner's content rect
// (so that padding on the fieldset affects the legend position).
LogicalRect innerContentRect = contentRect;
innerContentRect.Deflate(wm, aReflowInput.ComputedLogicalPadding(wm));
// If the inner content rect is larger than the legend, we can align the
// legend.
if (innerContentRect.ISize(wm) > mLegendRect.ISize(wm)) {
// NOTE legend @align values are: left/right/center
// GetLogicalAlign converts left/right to start/end for the given WM.
// @see HTMLLegendElement::ParseAttribute, nsLegendFrame::GetLogicalAlign
LegendAlignValue align =
static_cast<nsLegendFrame*>(legend->GetContentInsertionFrame())
->GetLogicalAlign(wm);
switch (align) {
case LegendAlignValue::InlineEnd:
mLegendRect.IStart(wm) =
innerContentRect.IEnd(wm) - mLegendRect.ISize(wm);
break;
case LegendAlignValue::Center:
// Note: rounding removed; there doesn't seem to be any need
mLegendRect.IStart(wm) =
innerContentRect.IStart(wm) +
(innerContentRect.ISize(wm) - mLegendRect.ISize(wm)) / 2;
break;
case LegendAlignValue::InlineStart:
mLegendRect.IStart(wm) = innerContentRect.IStart(wm);
break;
default:
MOZ_ASSERT_UNREACHABLE("unexpected GetLogicalAlign value");
}
} else {
// otherwise just start-align it.
mLegendRect.IStart(wm) = innerContentRect.IStart(wm);
}
// place the legend
LogicalRect actualLegendRect = mLegendRect;
actualLegendRect.Deflate(wm, legendMargin);
LogicalPoint actualLegendPos(actualLegendRect.Origin(wm));
// Note that legend's writing mode may be different from the fieldset's,
// so we need to convert offsets before applying them to it (bug 1134534).
LogicalMargin offsets = legendReflowInput->ComputedLogicalOffsets(wm);
ReflowInput::ApplyRelativePositioning(legend, wm, offsets, &actualLegendPos,
containerSize);
legend->SetPosition(wm, actualLegendPos, containerSize);
nsContainerFrame::PositionFrameView(legend);
nsContainerFrame::PositionChildViews(legend);
}
// Skip our block-end border if we're INCOMPLETE.
if (!aStatus.IsComplete() &&
StyleBorder()->mBoxDecorationBreak != StyleBoxDecorationBreak::Clone) {
border.BEnd(wm) = nscoord(0);
}
// Return our size and our result.
LogicalSize finalSize(
wm, contentRect.ISize(wm) + border.IStartEnd(wm),
mLegendSpace + border.BStartEnd(wm) + (inner ? inner->BSize(wm) : 0));
if (aReflowInput.mStyleDisplay->IsContainSize()) {
// If we're size-contained, then we must set finalSize to be what
// it'd be if we had no children (i.e. if we had no legend and if
// 'inner' were empty). Note: normally the fieldset's own padding
// (which we still must honor) would be accounted for as part of
// inner's size (see kidReflowInput.Init() call above). So: since
// we're disregarding sizing information from 'inner', we need to
// account for that padding ourselves here.
nscoord contentBoxBSize =
aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE
? aReflowInput.ApplyMinMaxBSize(0)
: aReflowInput.ComputedBSize();
finalSize.BSize(wm) =
contentBoxBSize +
aReflowInput.ComputedLogicalBorderPadding(wm).BStartEnd(wm);
}
if (aStatus.IsComplete() &&
aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
finalSize.BSize(wm) > aReflowInput.AvailableBSize() &&
border.BEnd(wm) > 0 && aReflowInput.AvailableBSize() > border.BEnd(wm)) {
// Our end border doesn't fit but it should fit in the next column/page.
if (MOZ_UNLIKELY(avoidBreakInside)) {
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
} else {
if (StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Slice) {
finalSize.BSize(wm) -= border.BEnd(wm);
}
aStatus.SetIncomplete();
}
}
if (!aStatus.IsComplete()) {
MOZ_ASSERT(aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE,
"must be Complete in an unconstrained available block-size");
// Stretch our BSize to fill the fragmentainer.
finalSize.BSize(wm) =
std::max(finalSize.BSize(wm), aReflowInput.AvailableBSize());
}
aDesiredSize.SetSize(wm, finalSize);
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (legend) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, legend);
}
if (inner) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, inner);
}
// Merge overflow container bounds and status.
aDesiredSize.mOverflowAreas.UnionWith(ocBounds);
aStatus.MergeCompletionStatusFrom(ocStatus);
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowInput,
aStatus);
InvalidateFrame();
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
#ifdef DEBUG
void nsFieldSetFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
nsContainerFrame::SetInitialChildList(aListID, aChildList);
MOZ_ASSERT(aListID != kPrincipalList || GetInner(),
"Setting principal child list should populate our inner frame");
}
void nsFieldSetFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) {
MOZ_CRASH("nsFieldSetFrame::AppendFrames not supported");
}
void nsFieldSetFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList& aFrameList) {
MOZ_CRASH("nsFieldSetFrame::InsertFrames not supported");
}
void nsFieldSetFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) {
MOZ_CRASH("nsFieldSetFrame::RemoveFrame not supported");
}
#endif
#ifdef ACCESSIBILITY
a11y::AccType nsFieldSetFrame::AccessibleType() {
return a11y::eHTMLGroupboxType;
}
#endif
nscoord nsFieldSetFrame::GetLogicalBaseline(WritingMode aWM) const {
switch (StyleDisplay()->DisplayInside()) {
case mozilla::StyleDisplayInside::Grid:
case mozilla::StyleDisplayInside::Flex:
return BaselineBOffset(aWM, BaselineSharingGroup::First,
AlignmentContext::Inline);
default:
return BSize(aWM) - BaselineBOffset(aWM, BaselineSharingGroup::Last,
AlignmentContext::Inline);
}
}
bool nsFieldSetFrame::GetVerticalAlignBaseline(WritingMode aWM,
nscoord* aBaseline) const {
if (StyleDisplay()->IsContainLayout()) {
// If we are layout-contained, our child 'inner' should not
// affect how we calculate our baseline.
return false;
}
nsIFrame* inner = GetInner();
if (MOZ_UNLIKELY(!inner)) {
return false;
}
MOZ_ASSERT(!inner->GetWritingMode().IsOrthogonalTo(aWM));
if (!inner->GetVerticalAlignBaseline(aWM, aBaseline)) {
return false;
}
nscoord innerBStart = inner->BStart(aWM, GetSize());
*aBaseline += innerBStart;
return true;
}
bool nsFieldSetFrame::GetNaturalBaselineBOffset(
WritingMode aWM, BaselineSharingGroup aBaselineGroup,
nscoord* aBaseline) const {
if (StyleDisplay()->IsContainLayout()) {
// If we are layout-contained, our child 'inner' should not
// affect how we calculate our baseline.
return false;
}
nsIFrame* inner = GetInner();
if (MOZ_UNLIKELY(!inner)) {
return false;
}
MOZ_ASSERT(!inner->GetWritingMode().IsOrthogonalTo(aWM));
if (!inner->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aBaseline)) {
return false;
}
nscoord innerBStart = inner->BStart(aWM, GetSize());
if (aBaselineGroup == BaselineSharingGroup::First) {
*aBaseline += innerBStart;
} else {
*aBaseline += BSize(aWM) - (innerBStart + inner->BSize(aWM));
}
return true;
}
void nsFieldSetFrame::AppendDirectlyOwnedAnonBoxes(
nsTArray<OwnedAnonBox>& aResult) {
if (nsIFrame* kid = GetInner()) {
aResult.AppendElement(OwnedAnonBox(kid));
}
}
void nsFieldSetFrame::EnsureChildContinuation(nsIFrame* aChild,
const nsReflowStatus& aStatus) {
MOZ_ASSERT(aChild == GetLegend() || aChild == GetInner(),
"unexpected child frame");
nsIFrame* nif = aChild->GetNextInFlow();
if (aStatus.IsFullyComplete()) {
if (nif) {
// NOTE: we want to avoid our DEBUG version of RemoveFrame above.
nsContainerFrame::RemoveFrame(kNoReflowPrincipalList, nif);
MOZ_ASSERT(!aChild->GetNextInFlow());
}
} else {
nsFrameList nifs;
if (!nif) {
auto* fc = PresShell()->FrameConstructor();
nif = fc->CreateContinuingFrame(aChild, this);
if (aStatus.IsOverflowIncomplete()) {
nif->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
nifs = nsFrameList(nif, nif);
} else {
// Steal all nifs and push them again in case they are currently on
// the wrong list.
for (nsIFrame* n = nif; n; n = n->GetNextInFlow()) {
n->GetParent()->StealFrame(n);
nifs.AppendFrame(this, n);
if (aStatus.IsOverflowIncomplete()) {
n->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
} else {
n->RemoveStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
}
}
if (aStatus.IsOverflowIncomplete()) {
if (nsFrameList* eoc = GetExcessOverflowContainers()) {
eoc->AppendFrames(nullptr, nifs);
} else {
SetExcessOverflowContainers(std::move(nifs));
}
} else {
if (nsFrameList* oc = GetOverflowFrames()) {
oc->AppendFrames(nullptr, nifs);
} else {
SetOverflowFrames(std::move(nifs));
}
}
}
}
|