1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 /* rendering object for CSS display:inline objects */
8 #include "nsInlineFrame.h"
9 #include "nsLineLayout.h"
10 #include "nsBlockFrame.h"
11 #include "nsPlaceholderFrame.h"
12 #include "nsGkAtoms.h"
13 #include "nsStyleContext.h"
14 #include "nsPresContext.h"
15 #include "nsRenderingContext.h"
16 #include "nsCSSAnonBoxes.h"
17 #include "nsAutoPtr.h"
18 #include "RestyleManager.h"
19 #include "nsDisplayList.h"
20 #include "mozilla/Likely.h"
21 #include "SVGTextFrame.h"
27 using namespace mozilla
;
28 using namespace mozilla::layout
;
31 //////////////////////////////////////////////////////////////////////
33 // Basic nsInlineFrame methods
36 NS_NewInlineFrame(nsIPresShell
* aPresShell
, nsStyleContext
* aContext
)
38 return new (aPresShell
) nsInlineFrame(aContext
);
41 NS_IMPL_FRAMEARENA_HELPERS(nsInlineFrame
)
43 NS_QUERYFRAME_HEAD(nsInlineFrame
)
44 NS_QUERYFRAME_ENTRY(nsInlineFrame
)
45 NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame
)
47 #ifdef DEBUG_FRAME_DUMP
49 nsInlineFrame::GetFrameName(nsAString
& aResult
) const
51 return MakeFrameName(NS_LITERAL_STRING("Inline"), aResult
);
56 nsInlineFrame::GetType() const
58 return nsGkAtoms::inlineFrame
;
62 nsInlineFrame::InvalidateFrame(uint32_t aDisplayItemKey
)
65 nsIFrame
* svgTextFrame
=
66 nsLayoutUtils::GetClosestFrameOfType(GetParent(),
67 nsGkAtoms::svgTextFrame
);
68 svgTextFrame
->InvalidateFrame();
71 nsInlineFrameBase::InvalidateFrame(aDisplayItemKey
);
75 nsInlineFrame::InvalidateFrameWithRect(const nsRect
& aRect
, uint32_t aDisplayItemKey
)
78 nsIFrame
* svgTextFrame
=
79 nsLayoutUtils::GetClosestFrameOfType(GetParent(),
80 nsGkAtoms::svgTextFrame
);
81 svgTextFrame
->InvalidateFrame();
84 nsInlineFrameBase::InvalidateFrameWithRect(aRect
, aDisplayItemKey
);
88 IsMarginZero(const nsStyleCoord
&aCoord
)
90 return aCoord
.GetUnit() == eStyleUnit_Auto
||
91 nsLayoutUtils::IsMarginZero(aCoord
);
95 nsInlineFrame::IsSelfEmpty()
98 // I used to think inline frames worked this way, but it seems they
99 // don't. At least not in our codebase.
100 if (GetPresContext()->CompatibilityMode() == eCompatibility_FullStandards
) {
104 const nsStyleMargin
* margin
= StyleMargin();
105 const nsStyleBorder
* border
= StyleBorder();
106 const nsStylePadding
* padding
= StylePadding();
107 // XXX Top and bottom removed, since they shouldn't affect things, but this
108 // doesn't really match with nsLineLayout.cpp's setting of
109 // ZeroEffectiveSpanBox, anymore, so what should this really be?
111 border
->GetComputedBorderWidth(NS_SIDE_RIGHT
) != 0 ||
112 !nsLayoutUtils::IsPaddingZero(padding
->mPadding
.GetRight()) ||
113 !IsMarginZero(margin
->mMargin
.GetRight());
115 border
->GetComputedBorderWidth(NS_SIDE_LEFT
) != 0 ||
116 !nsLayoutUtils::IsPaddingZero(padding
->mPadding
.GetLeft()) ||
117 !IsMarginZero(margin
->mMargin
.GetLeft());
118 if (haveLeft
|| haveRight
) {
119 // We skip this block and return false for box-decoration-break:clone since
120 // in that case all the continuations will have the border/padding/margin.
121 if ((GetStateBits() & NS_FRAME_PART_OF_IBSPLIT
) &&
122 StyleBorder()->mBoxDecorationBreak
==
123 NS_STYLE_BOX_DECORATION_BREAK_SLICE
) {
124 bool haveStart
, haveEnd
;
125 if (NS_STYLE_DIRECTION_LTR
== StyleVisibility()->mDirection
) {
126 haveStart
= haveLeft
;
129 haveStart
= haveRight
;
132 // For ib-split frames, ignore things we know we'll skip in GetSkipSides.
133 // XXXbz should we be doing this for non-ib-split frames too, in a more
136 // Get the first continuation eagerly, as a performance optimization, to
137 // avoid having to get it twice..
138 nsIFrame
* firstCont
= FirstContinuation();
140 (!haveStart
|| firstCont
->FrameIsNonFirstInIBSplit()) &&
141 (!haveEnd
|| firstCont
->FrameIsNonLastInIBSplit());
149 nsInlineFrame::IsEmpty()
151 if (!IsSelfEmpty()) {
155 for (nsIFrame
*kid
= mFrames
.FirstChild(); kid
; kid
= kid
->GetNextSibling()) {
163 nsIFrame::FrameSearchResult
164 nsInlineFrame::PeekOffsetCharacter(bool aForward
, int32_t* aOffset
,
165 bool aRespectClusters
)
167 // Override the implementation in nsFrame, to skip empty inline frames
168 NS_ASSERTION (aOffset
&& *aOffset
<= 1, "aOffset out of range");
169 int32_t startOffset
= *aOffset
;
172 if (aForward
== (startOffset
== 0)) {
173 // We're before the frame and moving forward, or after it and moving backwards:
174 // skip to the other side, but keep going.
175 *aOffset
= 1 - startOffset
;
181 nsInlineFrame::DestroyFrom(nsIFrame
* aDestructRoot
)
183 nsFrameList
* overflowFrames
= GetOverflowFrames();
184 if (overflowFrames
) {
185 // Fixup the parent pointers for any child frames on the OverflowList.
186 // nsIFrame::DestroyFrom depends on that to find the sticky scroll
187 // container (an ancestor).
188 nsIFrame
* lineContainer
= nsLayoutUtils::FindNearestBlockAncestor(this);
189 DrainSelfOverflowListInternal(eForDestroy
, lineContainer
);
191 nsContainerFrame::DestroyFrom(aDestructRoot
);
195 nsInlineFrame::StealFrame(nsIFrame
* aChild
,
198 if (aChild
->HasAnyStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER
) &&
200 return nsContainerFrame::StealFrame(aChild
, aForceNormal
);
203 nsInlineFrame
* parent
= this;
204 bool removed
= false;
206 removed
= parent
->mFrames
.StartRemoveFrame(aChild
);
211 // We didn't find the child in our principal child list.
212 // Maybe it's on the overflow list?
213 nsFrameList
* frameList
= parent
->GetOverflowFrames();
215 removed
= frameList
->ContinueRemoveFrame(aChild
);
216 if (frameList
->IsEmpty()) {
217 parent
->DestroyOverflowList();
224 // Due to our "lazy reparenting" optimization 'aChild' might not actually
225 // be on any of our child lists, but instead in one of our next-in-flows.
226 parent
= static_cast<nsInlineFrame
*>(parent
->GetNextInFlow());
229 MOZ_ASSERT(removed
, "nsInlineFrame::StealFrame: can't find aChild");
230 return removed
? NS_OK
: NS_ERROR_UNEXPECTED
;
234 nsInlineFrame::BuildDisplayList(nsDisplayListBuilder
* aBuilder
,
235 const nsRect
& aDirtyRect
,
236 const nsDisplayListSet
& aLists
)
238 BuildDisplayListForInline(aBuilder
, aDirtyRect
, aLists
);
240 // The sole purpose of this is to trigger display of the selection
241 // window for Named Anchors, which don't have any children and
242 // normally don't have any size, but in Editor we use CSS to display
243 // an image to represent this "hidden" element.
244 if (!mFrames
.FirstChild()) {
245 DisplaySelectionOverlay(aBuilder
, aLists
.Content());
249 //////////////////////////////////////////////////////////////////////
253 nsInlineFrame::AddInlineMinISize(nsRenderingContext
*aRenderingContext
,
254 nsIFrame::InlineMinISizeData
*aData
)
256 DoInlineIntrinsicISize(aRenderingContext
, aData
, nsLayoutUtils::MIN_ISIZE
);
260 nsInlineFrame::AddInlinePrefISize(nsRenderingContext
*aRenderingContext
,
261 nsIFrame::InlinePrefISizeData
*aData
)
263 DoInlineIntrinsicISize(aRenderingContext
, aData
, nsLayoutUtils::PREF_ISIZE
);
268 nsInlineFrame::ComputeSize(nsRenderingContext
*aRenderingContext
,
270 const LogicalSize
& aCBSize
,
271 nscoord aAvailableISize
,
272 const LogicalSize
& aMargin
,
273 const LogicalSize
& aBorder
,
274 const LogicalSize
& aPadding
,
275 ComputeSizeFlags aFlags
)
277 // Inlines and text don't compute size before reflow.
278 return LogicalSize(aWM
, NS_UNCONSTRAINEDSIZE
, NS_UNCONSTRAINEDSIZE
);
282 nsInlineFrame::ComputeTightBounds(gfxContext
* aContext
) const
285 if (StyleContext()->HasTextDecorationLines()) {
286 return GetVisualOverflowRect();
288 return ComputeSimpleTightBounds(aContext
);
292 nsInlineFrame::ReparentFloatsForInlineChild(nsIFrame
* aOurLineContainer
,
294 bool aReparentSiblings
)
296 // XXXbz this would be better if it took a nsFrameList or a frame
298 NS_ASSERTION(aOurLineContainer
->GetNextContinuation() ||
299 aOurLineContainer
->GetPrevContinuation(),
300 "Don't call this when we have no continuation, it's a waste");
302 NS_ASSERTION(aReparentSiblings
, "Why did we get called?");
306 nsIFrame
* ancestor
= aFrame
;
308 ancestor
= ancestor
->GetParent();
311 } while (!ancestor
->IsFloatContainingBlock());
313 if (ancestor
== aOurLineContainer
)
316 nsBlockFrame
* ourBlock
= nsLayoutUtils::GetAsBlock(aOurLineContainer
);
317 NS_ASSERTION(ourBlock
, "Not a block, but broke vertically?");
318 nsBlockFrame
* frameBlock
= nsLayoutUtils::GetAsBlock(ancestor
);
319 NS_ASSERTION(frameBlock
, "ancestor not a block");
322 ourBlock
->ReparentFloats(aFrame
, frameBlock
, false);
324 if (!aReparentSiblings
)
326 nsIFrame
* next
= aFrame
->GetNextSibling();
329 if (next
->GetParent() == aFrame
->GetParent()) {
333 // This is paranoid and will hardly ever get hit ... but we can't actually
334 // trust that the frames in the sibling chain all have the same parent,
335 // because lazy reparenting may be going on. If we find a different
336 // parent we need to redo our analysis.
337 ReparentFloatsForInlineChild(aOurLineContainer
, next
, aReparentSiblings
);
343 ReparentChildListStyle(nsPresContext
* aPresContext
,
344 const nsFrameList::Slice
& aFrames
,
345 nsIFrame
* aParentFrame
)
347 RestyleManager
* restyleManager
= aPresContext
->RestyleManager();
349 for (nsFrameList::Enumerator
e(aFrames
); !e
.AtEnd(); e
.Next()) {
350 NS_ASSERTION(e
.get()->GetParent() == aParentFrame
, "Bogus parentage");
351 restyleManager
->ReparentStyleContext(e
.get());
352 nsLayoutUtils::MarkDescendantsDirty(e
.get());
357 nsInlineFrame::Reflow(nsPresContext
* aPresContext
,
358 nsHTMLReflowMetrics
& aMetrics
,
359 const nsHTMLReflowState
& aReflowState
,
360 nsReflowStatus
& aStatus
)
362 DO_GLOBAL_REFLOW_COUNT("nsInlineFrame");
363 DISPLAY_REFLOW(aPresContext
, this, aReflowState
, aMetrics
, aStatus
);
364 if (nullptr == aReflowState
.mLineLayout
) {
365 NS_ERROR("must have non-null aReflowState.mLineLayout");
368 if (IsFrameTreeTooDeep(aReflowState
, aMetrics
, aStatus
)) {
372 bool lazilySetParentPointer
= false;
374 nsIFrame
* lineContainer
= aReflowState
.mLineLayout
->LineContainerFrame();
376 // Check for an overflow list with our prev-in-flow
377 nsInlineFrame
* prevInFlow
= (nsInlineFrame
*)GetPrevInFlow();
379 AutoFrameListPtr
prevOverflowFrames(aPresContext
,
380 prevInFlow
->StealOverflowFrames());
381 if (prevOverflowFrames
) {
382 // When pushing and pulling frames we need to check for whether any
383 // views need to be reparented.
384 nsContainerFrame::ReparentFrameViewList(*prevOverflowFrames
, prevInFlow
,
387 // Check if we should do the lazilySetParentPointer optimization.
388 // Only do it in simple cases where we're being reflowed for the
389 // first time, nothing (e.g. bidi resolution) has already given
390 // us children, and there's no next-in-flow, so all our frames
391 // will be taken from prevOverflowFrames.
392 if ((GetStateBits() & NS_FRAME_FIRST_REFLOW
) && mFrames
.IsEmpty() &&
394 // If our child list is empty, just put the new frames into it.
395 // Note that we don't set the parent pointer for the new frames. Instead wait
396 // to do this until we actually reflow the frame. If the overflow list contains
397 // thousands of frames this is a big performance issue (see bug #5588)
398 mFrames
.SetFrames(*prevOverflowFrames
);
399 lazilySetParentPointer
= true;
401 // Assign all floats to our block if necessary
402 if (lineContainer
&& lineContainer
->GetPrevContinuation()) {
403 ReparentFloatsForInlineChild(lineContainer
,
404 prevOverflowFrames
->FirstChild(),
407 // Insert the new frames at the beginning of the child list
408 // and set their parent pointer
409 const nsFrameList::Slice
& newFrames
=
410 mFrames
.InsertFrames(this, nullptr, *prevOverflowFrames
);
411 // If our prev in flow was under the first continuation of a first-line
412 // frame then we need to reparent the style contexts to remove the
413 // the special first-line styling. In the lazilySetParentPointer case
414 // we reparent the style contexts when we set their parents in
415 // nsInlineFrame::ReflowFrames and nsInlineFrame::ReflowInlineFrame.
416 if (aReflowState
.mLineLayout
->GetInFirstLine()) {
417 ReparentChildListStyle(aPresContext
, newFrames
, this);
423 // It's also possible that we have an overflow list for ourselves
425 if (GetStateBits() & NS_FRAME_FIRST_REFLOW
) {
426 // If it's our initial reflow, then we should not have an overflow list.
427 // However, add an assertion in case we get reflowed more than once with
428 // the initial reflow reason
429 nsFrameList
* overflowFrames
= GetOverflowFrames();
430 NS_ASSERTION(!overflowFrames
|| overflowFrames
->IsEmpty(),
431 "overflow list is not empty for initial reflow");
434 if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW
)) {
436 lazilySetParentPointer
? eDontReparentFrames
: DrainFlags(0);
437 if (aReflowState
.mLineLayout
->GetInFirstLine()) {
438 flags
= DrainFlags(flags
| eInFirstLine
);
440 DrainSelfOverflowListInternal(flags
, lineContainer
);
443 // Set our own reflow state (additional state above and beyond
445 InlineReflowState irs
;
446 irs
.mPrevFrame
= nullptr;
447 irs
.mLineContainer
= lineContainer
;
448 irs
.mLineLayout
= aReflowState
.mLineLayout
;
449 irs
.mNextInFlow
= (nsInlineFrame
*) GetNextInFlow();
450 irs
.mSetParentPointer
= lazilySetParentPointer
;
452 if (mFrames
.IsEmpty()) {
453 // Try to pull over one frame before starting so that we know
454 // whether we have an anonymous block or not.
456 (void) PullOneFrame(aPresContext
, irs
, &complete
);
459 ReflowFrames(aPresContext
, aReflowState
, irs
, aMetrics
, aStatus
);
461 ReflowAbsoluteFrames(aPresContext
, aMetrics
, aReflowState
, aStatus
);
463 // Note: the line layout code will properly compute our
464 // overflow-rect state for us.
466 NS_FRAME_SET_TRUNCATION(aStatus
, aReflowState
, aMetrics
);
470 nsInlineFrame::AttributeChanged(int32_t aNameSpaceID
,
475 nsInlineFrameBase::AttributeChanged(aNameSpaceID
, aAttribute
, aModType
);
482 SVGTextFrame
* f
= static_cast<SVGTextFrame
*>(
483 nsLayoutUtils::GetClosestFrameOfType(this, nsGkAtoms::svgTextFrame
));
484 f
->HandleAttributeChangeInDescendant(mContent
->AsElement(),
485 aNameSpaceID
, aAttribute
);
492 nsInlineFrame::DrainSelfOverflowListInternal(DrainFlags aFlags
,
493 nsIFrame
* aLineContainer
)
495 AutoFrameListPtr
overflowFrames(PresContext(), StealOverflowFrames());
496 if (overflowFrames
) {
497 // The frames on our own overflowlist may have been pushed by a
498 // previous lazilySetParentPointer Reflow so we need to ensure the
499 // correct parent pointer. This is sometimes skipped by Reflow.
500 if (!(aFlags
& eDontReparentFrames
)) {
501 nsIFrame
* firstChild
= overflowFrames
->FirstChild();
502 if (aLineContainer
&& aLineContainer
->GetPrevContinuation()) {
503 ReparentFloatsForInlineChild(aLineContainer
, firstChild
, true);
505 const bool doReparentSC
=
506 (aFlags
& eInFirstLine
) && !(aFlags
& eForDestroy
);
507 RestyleManager
* restyleManager
= PresContext()->RestyleManager();
508 for (nsIFrame
* f
= firstChild
; f
; f
= f
->GetNextSibling()) {
511 restyleManager
->ReparentStyleContext(f
);
512 nsLayoutUtils::MarkDescendantsDirty(f
);
516 bool result
= !overflowFrames
->IsEmpty();
517 mFrames
.AppendFrames(nullptr, *overflowFrames
);
524 nsInlineFrame::DrainSelfOverflowList()
526 nsIFrame
* lineContainer
= nsLayoutUtils::FindNearestBlockAncestor(this);
527 // Add the eInFirstLine flag if we have a ::first-line ancestor frame.
528 // No need to look further than the nearest line container though.
529 DrainFlags flags
= DrainFlags(0);
530 for (nsIFrame
* p
= GetParent(); p
!= lineContainer
; p
= p
->GetParent()) {
531 if (p
->GetType() == nsGkAtoms::lineFrame
) {
532 flags
= DrainFlags(flags
| eInFirstLine
);
536 return DrainSelfOverflowListInternal(flags
, lineContainer
);
540 nsInlineFrame::CanContinueTextRun() const
542 // We can continue a text run through an inline frame
547 nsInlineFrame::PullOverflowsFromPrevInFlow()
549 nsInlineFrame
* prevInFlow
= static_cast<nsInlineFrame
*>(GetPrevInFlow());
551 nsPresContext
* presContext
= PresContext();
552 AutoFrameListPtr
prevOverflowFrames(presContext
,
553 prevInFlow
->StealOverflowFrames());
554 if (prevOverflowFrames
) {
555 // Assume that our prev-in-flow has the same line container that we do.
556 nsContainerFrame::ReparentFrameViewList(*prevOverflowFrames
, prevInFlow
,
558 mFrames
.InsertFrames(this, nullptr, *prevOverflowFrames
);
564 nsInlineFrame::ReflowFrames(nsPresContext
* aPresContext
,
565 const nsHTMLReflowState
& aReflowState
,
566 InlineReflowState
& irs
,
567 nsHTMLReflowMetrics
& aMetrics
,
568 nsReflowStatus
& aStatus
)
570 aStatus
= NS_FRAME_COMPLETE
;
572 nsLineLayout
* lineLayout
= aReflowState
.mLineLayout
;
573 bool inFirstLine
= aReflowState
.mLineLayout
->GetInFirstLine();
574 RestyleManager
* restyleManager
= aPresContext
->RestyleManager();
575 WritingMode frameWM
= aReflowState
.GetWritingMode();
576 WritingMode lineWM
= aReflowState
.mLineLayout
->mRootSpan
->mWritingMode
;
577 LogicalMargin framePadding
= aReflowState
.ComputedLogicalBorderPadding();
578 nscoord startEdge
= 0;
579 const bool boxDecorationBreakClone
=
580 MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak
==
581 NS_STYLE_BOX_DECORATION_BREAK_CLONE
);
582 // Don't offset by our start borderpadding if we have a prev continuation or
583 // if we're in a part of an {ib} split other than the first one. For
584 // box-decoration-break:clone we always offset our start since all
585 // continuations have border/padding.
586 if ((!GetPrevContinuation() && !FrameIsNonFirstInIBSplit()) ||
587 boxDecorationBreakClone
) {
588 startEdge
= framePadding
.IStart(frameWM
);
590 nscoord availableISize
= aReflowState
.AvailableISize();
591 NS_ASSERTION(availableISize
!= NS_UNCONSTRAINEDSIZE
,
592 "should no longer use available widths");
593 // Subtract off inline axis border+padding from availableISize
594 availableISize
-= startEdge
;
595 availableISize
-= framePadding
.IEnd(frameWM
);
596 lineLayout
->BeginSpan(this, &aReflowState
, startEdge
,
597 startEdge
+ availableISize
, &mBaseline
);
599 // First reflow our principal children.
600 nsIFrame
* frame
= mFrames
.FirstChild();
603 // Check if we should lazily set the child frame's parent pointer.
604 if (irs
.mSetParentPointer
) {
606 irs
.mLineContainer
&& irs
.mLineContainer
->GetPrevContinuation();
607 nsIFrame
* child
= frame
;
609 // If our block is the first in flow, then any floats under the pulled
610 // frame must already belong to our block.
612 // This has to happen before we update frame's parent; we need to
613 // know frame's ancestry under its old block.
614 // The blockChildren.ContainsFrame check performed by
615 // ReparentFloatsForInlineChild here may be slow, but we can't
616 // easily avoid it because we don't know where 'frame' originally
617 // came from. If we really really have to optimize this we could
618 // cache whether frame->GetParent() is under its containing blocks
619 // overflowList or not.
620 ReparentFloatsForInlineChild(irs
.mLineContainer
, child
, false);
622 child
->SetParent(this);
624 restyleManager
->ReparentStyleContext(child
);
625 nsLayoutUtils::MarkDescendantsDirty(child
);
627 // We also need to do the same for |frame|'s next-in-flows that are in
628 // the sibling list. Otherwise, if we reflow |frame| and it's complete
629 // we'll crash when trying to delete its next-in-flow.
630 // This scenario doesn't happen often, but it can happen.
631 nsIFrame
* nextSibling
= child
->GetNextSibling();
632 child
= child
->GetNextInFlow();
633 if (MOZ_UNLIKELY(child
)) {
634 while (child
!= nextSibling
&& nextSibling
) {
635 nextSibling
= nextSibling
->GetNextSibling();
641 MOZ_ASSERT(!child
|| mFrames
.ContainsFrame(child
));
644 // Fix the parent pointer for ::first-letter child frame next-in-flows,
645 // so nsFirstLetterFrame::Reflow can destroy them safely (bug 401042).
646 nsIFrame
* realFrame
= nsPlaceholderFrame::GetRealFrameFor(frame
);
647 if (realFrame
->GetType() == nsGkAtoms::letterFrame
) {
648 nsIFrame
* child
= realFrame
->GetFirstPrincipalChild();
650 NS_ASSERTION(child
->GetType() == nsGkAtoms::textFrame
,
651 "unexpected frame type");
652 nsIFrame
* nextInFlow
= child
->GetNextInFlow();
653 for ( ; nextInFlow
; nextInFlow
= nextInFlow
->GetNextInFlow()) {
654 NS_ASSERTION(nextInFlow
->GetType() == nsGkAtoms::textFrame
,
655 "unexpected frame type");
656 if (mFrames
.ContainsFrame(nextInFlow
)) {
657 nextInFlow
->SetParent(this);
659 restyleManager
->ReparentStyleContext(nextInFlow
);
660 nsLayoutUtils::MarkDescendantsDirty(nextInFlow
);
665 // Once we find a next-in-flow that isn't ours none of the
666 // remaining next-in-flows should be either.
667 for ( ; nextInFlow
; nextInFlow
= nextInFlow
->GetNextInFlow()) {
668 NS_ASSERTION(!mFrames
.ContainsFrame(nextInFlow
),
669 "unexpected letter frame flow");
678 MOZ_ASSERT(frame
->GetParent() == this);
681 bool reflowingFirstLetter
= lineLayout
->GetFirstLetterStyleOK();
682 ReflowInlineFrame(aPresContext
, aReflowState
, irs
, frame
, aStatus
);
683 done
= NS_INLINE_IS_BREAK(aStatus
) ||
684 (!reflowingFirstLetter
&& NS_FRAME_IS_NOT_COMPLETE(aStatus
));
686 if (!irs
.mSetParentPointer
) {
689 // Keep reparenting the remaining siblings, but don't reflow them.
690 nsFrameList
* pushedFrames
= GetOverflowFrames();
691 if (pushedFrames
&& pushedFrames
->FirstChild() == frame
) {
692 // Don't bother if |frame| was pushed to our overflow list.
696 irs
.mPrevFrame
= frame
;
699 frame
= frame
->GetNextSibling();
702 // Attempt to pull frames from our next-in-flow until we can't
703 if (!done
&& GetNextInFlow()) {
705 bool reflowingFirstLetter
= lineLayout
->GetFirstLetterStyleOK();
707 if (!frame
) { // Could be non-null if we pulled a first-letter frame and
708 // it created a continuation, since we don't push those.
709 frame
= PullOneFrame(aPresContext
, irs
, &isComplete
);
712 printf("%p pulled up %p\n", this, frame
);
714 if (nullptr == frame
) {
716 aStatus
= NS_FRAME_NOT_COMPLETE
;
720 ReflowInlineFrame(aPresContext
, aReflowState
, irs
, frame
, aStatus
);
721 if (NS_INLINE_IS_BREAK(aStatus
) ||
722 (!reflowingFirstLetter
&& NS_FRAME_IS_NOT_COMPLETE(aStatus
))) {
725 irs
.mPrevFrame
= frame
;
726 frame
= frame
->GetNextSibling();
730 NS_ASSERTION(!NS_FRAME_IS_COMPLETE(aStatus
) || !GetOverflowFrames(),
731 "We can't be complete AND have overflow frames!");
733 // If after reflowing our children they take up no area then make
734 // sure that we don't either.
736 // Note: CSS demands that empty inline elements still affect the
737 // line-height calculations. However, continuations of an inline
738 // that are empty we force to empty so that things like collapsed
739 // whitespace in an inline element don't affect the line-height.
740 aMetrics
.ISize(lineWM
) = lineLayout
->EndSpan(this);
742 // Compute final width.
744 // XXX Note that that the padding start and end are in the frame's
745 // writing mode, but the metrics' inline-size is in the line's
746 // writing mode. This makes sense if the line and frame are both
747 // vertical or both horizontal, but what should happen with
748 // orthogonal inlines?
750 // Make sure to not include our start border and padding if we have a prev
751 // continuation or if we're in a part of an {ib} split other than the first
752 // one. For box-decoration-break:clone we always include our start border
753 // and padding since all continuations have them.
754 if ((!GetPrevContinuation() && !FrameIsNonFirstInIBSplit()) ||
755 boxDecorationBreakClone
) {
756 aMetrics
.ISize(lineWM
) += framePadding
.IStart(frameWM
);
760 * We want to only apply the end border and padding if we're the last
761 * continuation and either not in an {ib} split or the last part of it. To
762 * be the last continuation we have to be complete (so that we won't get a
763 * next-in-flow) and have no non-fluid continuations on our continuation
764 * chain. For box-decoration-break:clone we always apply the end border and
765 * padding since all continuations have them.
767 if ((NS_FRAME_IS_COMPLETE(aStatus
) &&
768 !LastInFlow()->GetNextContinuation() &&
769 !FrameIsNonLastInIBSplit()) ||
770 boxDecorationBreakClone
) {
771 aMetrics
.ISize(lineWM
) += framePadding
.IEnd(frameWM
);
774 nsLayoutUtils::SetBSizeFromFontMetrics(this, aMetrics
, aReflowState
,
775 framePadding
, lineWM
, frameWM
);
777 // For now our overflow area is zero. The real value will be
778 // computed in |nsLineLayout::RelativePositionFrames|.
779 aMetrics
.mOverflowAreas
.Clear();
781 #ifdef NOISY_FINAL_SIZE
783 printf(": metrics=%d,%d ascent=%d\n",
784 aMetrics
.Width(), aMetrics
.Height(), aMetrics
.TopAscent());
789 nsInlineFrame::ReflowInlineFrame(nsPresContext
* aPresContext
,
790 const nsHTMLReflowState
& aReflowState
,
791 InlineReflowState
& irs
,
793 nsReflowStatus
& aStatus
)
795 nsLineLayout
* lineLayout
= aReflowState
.mLineLayout
;
796 bool reflowingFirstLetter
= lineLayout
->GetFirstLetterStyleOK();
798 lineLayout
->ReflowFrame(aFrame
, aStatus
, nullptr, pushedFrame
);
800 if (NS_INLINE_IS_BREAK_BEFORE(aStatus
)) {
801 if (aFrame
!= mFrames
.FirstChild()) {
802 // Change break-before status into break-after since we have
803 // already placed at least one child frame. This preserves the
804 // break-type so that it can be propagated upward.
805 aStatus
= NS_FRAME_NOT_COMPLETE
|
806 NS_INLINE_BREAK
| NS_INLINE_BREAK_AFTER
|
807 (aStatus
& NS_INLINE_BREAK_TYPE_MASK
);
808 PushFrames(aPresContext
, aFrame
, irs
.mPrevFrame
, irs
);
811 // Preserve reflow status when breaking-before our first child
812 // and propagate it upward without modification.
817 // Create a next-in-flow if needed.
818 if (!NS_FRAME_IS_FULLY_COMPLETE(aStatus
)) {
819 CreateNextInFlow(aFrame
);
822 if (NS_INLINE_IS_BREAK_AFTER(aStatus
)) {
823 nsIFrame
* nextFrame
= aFrame
->GetNextSibling();
825 NS_FRAME_SET_INCOMPLETE(aStatus
);
826 PushFrames(aPresContext
, nextFrame
, aFrame
, irs
);
829 // We must return an incomplete status if there are more child
830 // frames remaining in a next-in-flow that follows this frame.
831 nsInlineFrame
* nextInFlow
= static_cast<nsInlineFrame
*>(GetNextInFlow());
833 if (nextInFlow
->mFrames
.NotEmpty()) {
834 NS_FRAME_SET_INCOMPLETE(aStatus
);
837 nextInFlow
= static_cast<nsInlineFrame
*>(nextInFlow
->GetNextInFlow());
843 if (!NS_FRAME_IS_FULLY_COMPLETE(aStatus
) && !reflowingFirstLetter
) {
844 nsIFrame
* nextFrame
= aFrame
->GetNextSibling();
846 PushFrames(aPresContext
, nextFrame
, aFrame
, irs
);
852 nsInlineFrame::PullOneFrame(nsPresContext
* aPresContext
,
853 InlineReflowState
& irs
,
856 bool isComplete
= true;
858 nsIFrame
* frame
= nullptr;
859 nsInlineFrame
* nextInFlow
= irs
.mNextInFlow
;
861 frame
= nextInFlow
->mFrames
.FirstChild();
863 // The nextInFlow's principal list has no frames, try its overflow list.
864 nsFrameList
* overflowFrames
= nextInFlow
->GetOverflowFrames();
865 if (overflowFrames
) {
866 frame
= overflowFrames
->RemoveFirstChild();
867 if (overflowFrames
->IsEmpty()) {
868 // We're stealing the only frame - delete the overflow list.
869 nextInFlow
->DestroyOverflowList();
871 // We leave the remaining frames on the overflow list (rather than
872 // putting them on nextInFlow's principal list) so we don't have to
873 // set up the parent for them.
875 // ReparentFloatsForInlineChild needs it to be on a child list -
876 // we remove it again below.
877 nextInFlow
->mFrames
.SetFrames(frame
);
882 // If our block has no next continuation, then any floats belonging to
883 // the pulled frame must belong to our block already. This check ensures
884 // we do no extra work in the common non-vertical-breaking case.
885 if (irs
.mLineContainer
&& irs
.mLineContainer
->GetNextContinuation()) {
886 // The blockChildren.ContainsFrame check performed by
887 // ReparentFloatsForInlineChild will be fast because frame's ancestor
888 // will be the first child of its containing block.
889 ReparentFloatsForInlineChild(irs
.mLineContainer
, frame
, false);
891 nextInFlow
->mFrames
.RemoveFirstChild();
892 // nsFirstLineFrame::PullOneFrame calls ReparentStyleContext.
894 mFrames
.InsertFrame(this, irs
.mPrevFrame
, frame
);
896 if (irs
.mLineLayout
) {
897 irs
.mLineLayout
->SetDirtyNextLine();
899 nsContainerFrame::ReparentFrameView(frame
, nextInFlow
, this);
902 nextInFlow
= static_cast<nsInlineFrame
*>(nextInFlow
->GetNextInFlow());
903 irs
.mNextInFlow
= nextInFlow
;
906 *aIsComplete
= isComplete
;
911 nsInlineFrame::PushFrames(nsPresContext
* aPresContext
,
912 nsIFrame
* aFromChild
,
913 nsIFrame
* aPrevSibling
,
914 InlineReflowState
& aState
)
916 NS_PRECONDITION(aFromChild
, "null pointer");
917 NS_PRECONDITION(aPrevSibling
, "pushing first child");
918 NS_PRECONDITION(aPrevSibling
->GetNextSibling() == aFromChild
, "bad prev sibling");
921 printf("%p pushing aFromChild %p, disconnecting from prev sib %p\n",
922 this, aFromChild
, aPrevSibling
);
925 // Add the frames to our overflow list (let our next in flow drain
926 // our overflow list when it is ready)
927 SetOverflowFrames(mFrames
.RemoveFramesAfter(aPrevSibling
));
928 if (aState
.mLineLayout
) {
929 aState
.mLineLayout
->SetDirtyNextLine();
934 //////////////////////////////////////////////////////////////////////
936 nsIFrame::LogicalSides
937 nsInlineFrame::GetLogicalSkipSides(const nsHTMLReflowState
* aReflowState
) const
939 if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak
==
940 NS_STYLE_BOX_DECORATION_BREAK_CLONE
)) {
941 return LogicalSides();
946 nsInlineFrame
* prev
= (nsInlineFrame
*) GetPrevContinuation();
947 if ((GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET
) ||
948 (prev
&& (prev
->mRect
.height
|| prev
->mRect
.width
))) {
949 // Prev continuation is not empty therefore we don't render our start
951 skip
|= eLogicalSideBitsIStart
;
954 // If the prev continuation is empty, then go ahead and let our start
955 // edge border render.
959 nsInlineFrame
* next
= (nsInlineFrame
*) GetNextContinuation();
960 if ((GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET
) ||
961 (next
&& (next
->mRect
.height
|| next
->mRect
.width
))) {
962 // Next continuation is not empty therefore we don't render our end
964 skip
|= eLogicalSideBitsIEnd
;
967 // If the next continuation is empty, then go ahead and let our end
968 // edge border render.
972 if (GetStateBits() & NS_FRAME_PART_OF_IBSPLIT
) {
973 // All but the last part of an {ib} split should skip the "end" side (as
974 // determined by this frame's direction) and all but the first part of such
975 // a split should skip the "start" side. But figuring out which part of
976 // the split we are involves getting our first continuation, which might be
977 // expensive. So don't bother if we already have the relevant bits set.
978 if (skip
!= LogicalSides(eLogicalSideBitsIBoth
)) {
979 // We're missing one of the skip bits, so check whether we need to set it.
980 // Only get the first continuation once, as an optimization.
981 nsIFrame
* firstContinuation
= FirstContinuation();
982 if (firstContinuation
->FrameIsNonLastInIBSplit()) {
983 skip
|= eLogicalSideBitsIEnd
;
985 if (firstContinuation
->FrameIsNonFirstInIBSplit()) {
986 skip
|= eLogicalSideBitsIStart
;
995 nsInlineFrame::GetLogicalBaseline(mozilla::WritingMode aWritingMode
) const
1000 #ifdef ACCESSIBILITY
1002 nsInlineFrame::AccessibleType()
1004 // Broken image accessibles are created here, because layout
1005 // replaces the image or image control frame with an inline frame
1006 nsIAtom
*tagAtom
= mContent
->Tag();
1007 if (tagAtom
== nsGkAtoms::input
) // Broken <input type=image ... />
1008 return a11y::eHTMLButtonType
;
1009 if (tagAtom
== nsGkAtoms::img
) // Create accessible for broken <img>
1010 return a11y::eHyperTextType
;
1012 return a11y::eNoType
;
1016 //////////////////////////////////////////////////////////////////////
1018 // nsLineFrame implementation
1021 NS_NewFirstLineFrame(nsIPresShell
* aPresShell
, nsStyleContext
* aContext
)
1023 return new (aPresShell
) nsFirstLineFrame(aContext
);
1026 NS_IMPL_FRAMEARENA_HELPERS(nsFirstLineFrame
)
1029 nsFirstLineFrame::Init(nsIContent
* aContent
,
1030 nsContainerFrame
* aParent
,
1031 nsIFrame
* aPrevInFlow
)
1033 nsInlineFrame::Init(aContent
, aParent
, aPrevInFlow
);
1035 MOZ_ASSERT(StyleContext()->GetPseudo() == nsCSSPseudoElements::firstLine
);
1039 // This frame is a continuation - fixup the style context if aPrevInFlow
1040 // is the first-in-flow (the only one with a ::first-line pseudo).
1041 if (aPrevInFlow
->StyleContext()->GetPseudo() == nsCSSPseudoElements::firstLine
) {
1042 MOZ_ASSERT(FirstInFlow() == aPrevInFlow
);
1043 // Create a new style context that is a child of the parent
1044 // style context thus removing the ::first-line style. This way
1045 // we behave as if an anonymous (unstyled) span was the child
1046 // of the parent frame.
1047 nsStyleContext
* parentContext
= aParent
->StyleContext();
1048 nsRefPtr
<nsStyleContext
> newSC
= PresContext()->StyleSet()->
1049 ResolveAnonymousBoxStyle(nsCSSAnonBoxes::mozLineFrame
, parentContext
);
1050 SetStyleContext(newSC
);
1052 MOZ_ASSERT(FirstInFlow() != aPrevInFlow
);
1053 MOZ_ASSERT(aPrevInFlow
->StyleContext()->GetPseudo() ==
1054 nsCSSAnonBoxes::mozLineFrame
);
1058 #ifdef DEBUG_FRAME_DUMP
1060 nsFirstLineFrame::GetFrameName(nsAString
& aResult
) const
1062 return MakeFrameName(NS_LITERAL_STRING("Line"), aResult
);
1067 nsFirstLineFrame::GetType() const
1069 return nsGkAtoms::lineFrame
;
1073 nsFirstLineFrame::PullOneFrame(nsPresContext
* aPresContext
, InlineReflowState
& irs
,
1076 nsIFrame
* frame
= nsInlineFrame::PullOneFrame(aPresContext
, irs
, aIsComplete
);
1077 if (frame
&& !GetPrevInFlow()) {
1078 // We are a first-line frame. Fixup the child frames
1079 // style-context that we just pulled.
1080 NS_ASSERTION(frame
->GetParent() == this, "Incorrect parent?");
1081 aPresContext
->RestyleManager()->ReparentStyleContext(frame
);
1082 nsLayoutUtils::MarkDescendantsDirty(frame
);
1088 nsFirstLineFrame::Reflow(nsPresContext
* aPresContext
,
1089 nsHTMLReflowMetrics
& aMetrics
,
1090 const nsHTMLReflowState
& aReflowState
,
1091 nsReflowStatus
& aStatus
)
1093 if (nullptr == aReflowState
.mLineLayout
) {
1094 return; // XXX does this happen? why?
1097 nsIFrame
* lineContainer
= aReflowState
.mLineLayout
->LineContainerFrame();
1099 // Check for an overflow list with our prev-in-flow
1100 nsFirstLineFrame
* prevInFlow
= (nsFirstLineFrame
*)GetPrevInFlow();
1102 AutoFrameListPtr
prevOverflowFrames(aPresContext
,
1103 prevInFlow
->StealOverflowFrames());
1104 if (prevOverflowFrames
) {
1105 // Assign all floats to our block if necessary
1106 if (lineContainer
&& lineContainer
->GetPrevContinuation()) {
1107 ReparentFloatsForInlineChild(lineContainer
,
1108 prevOverflowFrames
->FirstChild(),
1111 const nsFrameList::Slice
& newFrames
=
1112 mFrames
.InsertFrames(this, nullptr, *prevOverflowFrames
);
1113 ReparentChildListStyle(aPresContext
, newFrames
, this);
1117 // It's also possible that we have an overflow list for ourselves.
1118 DrainSelfOverflowList();
1120 // Set our own reflow state (additional state above and beyond
1122 InlineReflowState irs
;
1123 irs
.mPrevFrame
= nullptr;
1124 irs
.mLineContainer
= lineContainer
;
1125 irs
.mLineLayout
= aReflowState
.mLineLayout
;
1126 irs
.mNextInFlow
= (nsInlineFrame
*) GetNextInFlow();
1128 bool wasEmpty
= mFrames
.IsEmpty();
1130 // Try to pull over one frame before starting so that we know
1131 // whether we have an anonymous block or not.
1133 PullOneFrame(aPresContext
, irs
, &complete
);
1136 if (nullptr == GetPrevInFlow()) {
1137 // XXX This is pretty sick, but what we do here is to pull-up, in
1138 // advance, all of the next-in-flows children. We re-resolve their
1139 // style while we are at at it so that when we reflow they have
1142 // All of this is so that text-runs reflow properly.
1143 irs
.mPrevFrame
= mFrames
.LastChild();
1146 nsIFrame
* frame
= PullOneFrame(aPresContext
, irs
, &complete
);
1150 irs
.mPrevFrame
= frame
;
1152 irs
.mPrevFrame
= nullptr;
1155 NS_ASSERTION(!aReflowState
.mLineLayout
->GetInFirstLine(),
1156 "Nested first-line frames? BOGUS");
1157 aReflowState
.mLineLayout
->SetInFirstLine(true);
1158 ReflowFrames(aPresContext
, aReflowState
, irs
, aMetrics
, aStatus
);
1159 aReflowState
.mLineLayout
->SetInFirstLine(false);
1161 ReflowAbsoluteFrames(aPresContext
, aMetrics
, aReflowState
, aStatus
);
1163 // Note: the line layout code will properly compute our overflow state for us
1167 nsFirstLineFrame::PullOverflowsFromPrevInFlow()
1169 nsFirstLineFrame
* prevInFlow
= static_cast<nsFirstLineFrame
*>(GetPrevInFlow());
1171 nsPresContext
* presContext
= PresContext();
1172 AutoFrameListPtr
prevOverflowFrames(presContext
,
1173 prevInFlow
->StealOverflowFrames());
1174 if (prevOverflowFrames
) {
1175 // Assume that our prev-in-flow has the same line container that we do.
1176 const nsFrameList::Slice
& newFrames
=
1177 mFrames
.InsertFrames(this, nullptr, *prevOverflowFrames
);
1178 ReparentChildListStyle(presContext
, newFrames
, this);
1184 nsFirstLineFrame::DrainSelfOverflowList()
1186 AutoFrameListPtr
overflowFrames(PresContext(), StealOverflowFrames());
1187 if (overflowFrames
) {
1188 bool result
= !overflowFrames
->IsEmpty();
1189 const nsFrameList::Slice
& newFrames
=
1190 mFrames
.AppendFrames(nullptr, *overflowFrames
);
1191 ReparentChildListStyle(PresContext(), newFrames
, this);