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Diffstat (limited to 'layout/generic/nsIFrameInlines.h')
| -rw-r--r-- | layout/generic/nsIFrameInlines.h | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/layout/generic/nsIFrameInlines.h b/layout/generic/nsIFrameInlines.h new file mode 100644 index 0000000000..4c9d151f98 --- /dev/null +++ b/layout/generic/nsIFrameInlines.h @@ -0,0 +1,278 @@ +/* -*- 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/. */ + +#ifndef nsIFrameInlines_h___ +#define nsIFrameInlines_h___ + +#include "mozilla/dom/ElementInlines.h" +#include "nsContainerFrame.h" +#include "nsLayoutUtils.h" +#include "nsPlaceholderFrame.h" +#include "nsStyleStructInlines.h" +#include "nsCSSAnonBoxes.h" +#include "nsFrameManager.h" + +bool nsIFrame::IsSVGGeometryFrameOrSubclass() const { + return IsSVGGeometryFrame() || IsSVGImageFrame(); +} + +bool nsIFrame::IsFlexItem() const { + return GetParent() && GetParent()->IsFlexContainerFrame() && + !HasAnyStateBits(NS_FRAME_OUT_OF_FLOW); +} + +bool nsIFrame::IsGridItem() const { + return GetParent() && GetParent()->IsGridContainerFrame() && + !HasAnyStateBits(NS_FRAME_OUT_OF_FLOW); +} + +bool nsIFrame::IsFlexOrGridContainer() const { + return IsFlexContainerFrame() || IsGridContainerFrame(); +} + +bool nsIFrame::IsFlexOrGridItem() const { + return !HasAnyStateBits(NS_FRAME_OUT_OF_FLOW) && GetParent() && + GetParent()->IsFlexOrGridContainer(); +} + +bool nsIFrame::IsMasonry(mozilla::LogicalAxis aAxis) const { + MOZ_DIAGNOSTIC_ASSERT(IsGridContainerFrame()); + return HasAnyStateBits(aAxis == mozilla::eLogicalAxisBlock + ? NS_STATE_GRID_IS_ROW_MASONRY + : NS_STATE_GRID_IS_COL_MASONRY); +} + +bool nsIFrame::IsTableCaption() const { + return StyleDisplay()->mDisplay == mozilla::StyleDisplay::TableCaption && + GetParent()->Style()->GetPseudoType() == + mozilla::PseudoStyleType::tableWrapper; +} + +bool nsIFrame::IsFloating() const { return StyleDisplay()->IsFloating(this); } + +bool nsIFrame::IsAbsPosContainingBlock() const { + return StyleDisplay()->IsAbsPosContainingBlock(this); +} + +bool nsIFrame::IsFixedPosContainingBlock() const { + return StyleDisplay()->IsFixedPosContainingBlock(this); +} + +bool nsIFrame::IsRelativelyPositioned() const { + return StyleDisplay()->IsRelativelyPositioned(this); +} + +bool nsIFrame::IsStickyPositioned() const { + return StyleDisplay()->IsStickyPositioned(this); +} + +bool nsIFrame::IsAbsolutelyPositioned( + const nsStyleDisplay* aStyleDisplay) const { + const nsStyleDisplay* disp = StyleDisplayWithOptionalParam(aStyleDisplay); + return disp->IsAbsolutelyPositioned(this); +} + +inline bool nsIFrame::IsTrueOverflowContainer() const { + return HasAnyStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER) && + !(HasAnyStateBits(NS_FRAME_OUT_OF_FLOW) && IsAbsolutelyPositioned()); + // XXXfr This check isn't quite correct, because it doesn't handle cases + // where the out-of-flow has overflow.. but that's rare. + // We'll need to revisit the way abspos continuations are handled later + // for various reasons, this detail is one of them. See bug 154892 +} + +bool nsIFrame::IsBlockOutside() const { + return StyleDisplay()->IsBlockOutside(this); +} + +bool nsIFrame::IsInlineOutside() const { + return StyleDisplay()->IsInlineOutside(this); +} + +bool nsIFrame::IsColumnSpan() const { + return IsBlockOutside() && StyleColumn()->IsColumnSpanStyle(); +} + +bool nsIFrame::IsColumnSpanInMulticolSubtree() const { + return IsColumnSpan() && + (HasAnyStateBits(NS_FRAME_HAS_MULTI_COLUMN_ANCESTOR) || + // A frame other than inline and block won't have + // NS_FRAME_HAS_MULTI_COLUMN_ANCESTOR. We instead test its parent. + (GetParent() && GetParent()->Style()->GetPseudoType() == + mozilla::PseudoStyleType::columnSpanWrapper)); +} + +mozilla::StyleDisplay nsIFrame::GetDisplay() const { + return StyleDisplay()->GetDisplay(this); +} + +nscoord nsIFrame::SynthesizeBaselineBOffsetFromMarginBox( + mozilla::WritingMode aWM, BaselineSharingGroup aGroup) const { + MOZ_ASSERT(!aWM.IsOrthogonalTo(GetWritingMode())); + auto margin = GetLogicalUsedMargin(aWM); + if (aGroup == BaselineSharingGroup::First) { + if (aWM.IsAlphabeticalBaseline()) { + // First baseline for inverted-line content is the block-start margin + // edge, as the frame is in effect "flipped" for alignment purposes. + return MOZ_UNLIKELY(aWM.IsLineInverted()) ? -margin.BStart(aWM) + : BSize(aWM) + margin.BEnd(aWM); + } + nscoord marginBoxCenter = (BSize(aWM) + margin.BStartEnd(aWM)) / 2; + return marginBoxCenter - margin.BStart(aWM); + } + MOZ_ASSERT(aGroup == BaselineSharingGroup::Last); + if (aWM.IsAlphabeticalBaseline()) { + // Last baseline for inverted-line content is the block-start margin edge, + // as the frame is in effect "flipped" for alignment purposes. + return MOZ_UNLIKELY(aWM.IsLineInverted()) ? BSize(aWM) + margin.BStart(aWM) + : -margin.BEnd(aWM); + } + // Round up for central baseline offset, to be consistent with ::First. + nscoord marginBoxSize = BSize(aWM) + margin.BStartEnd(aWM); + nscoord marginBoxCenter = (marginBoxSize / 2) + (marginBoxSize % 2); + return marginBoxCenter - margin.BEnd(aWM); +} + +nscoord nsIFrame::SynthesizeBaselineBOffsetFromBorderBox( + mozilla::WritingMode aWM, BaselineSharingGroup aGroup) const { + nscoord borderBoxSize = MOZ_UNLIKELY(aWM.IsOrthogonalTo(GetWritingMode())) + ? ISize(aWM) + : BSize(aWM); + if (aGroup == BaselineSharingGroup::First) { + return MOZ_LIKELY(aWM.IsAlphabeticalBaseline()) ? borderBoxSize + : borderBoxSize / 2; + } + MOZ_ASSERT(aGroup == BaselineSharingGroup::Last); + // Round up for central baseline offset, to be consistent with ::First. + auto borderBoxCenter = (borderBoxSize / 2) + (borderBoxSize % 2); + return MOZ_LIKELY(aWM.IsAlphabeticalBaseline()) ? 0 : borderBoxCenter; +} + +nscoord nsIFrame::SynthesizeBaselineBOffsetFromContentBox( + mozilla::WritingMode aWM, BaselineSharingGroup aGroup) const { + mozilla::WritingMode wm = GetWritingMode(); + MOZ_ASSERT(!aWM.IsOrthogonalTo(wm)); + const auto bp = GetLogicalUsedBorderAndPadding(wm) + .ApplySkipSides(GetLogicalSkipSides()) + .ConvertTo(aWM, wm); + + if (MOZ_UNLIKELY(aWM.IsCentralBaseline())) { + nscoord contentBoxBSize = BSize(aWM) - bp.BStartEnd(aWM); + if (aGroup == BaselineSharingGroup::First) { + return contentBoxBSize / 2 + bp.BStart(aWM); + } + // Return the same center position as for ::First, but as offset from end: + nscoord halfContentBoxBSize = (contentBoxBSize / 2) + (contentBoxBSize % 2); + return halfContentBoxBSize + bp.BEnd(aWM); + } + if (aGroup == BaselineSharingGroup::First) { + // First baseline for inverted-line content is the block-start content + // edge, as the frame is in effect "flipped" for alignment purposes. + return MOZ_UNLIKELY(aWM.IsLineInverted()) ? bp.BStart(aWM) + : BSize(aWM) - bp.BEnd(aWM); + } + // Last baseline for inverted-line content is the block-start content edge, + // as the frame is in effect "flipped" for alignment purposes. + return MOZ_UNLIKELY(aWM.IsLineInverted()) ? BSize(aWM) - bp.BStart(aWM) + : bp.BEnd(aWM); +} + +nscoord nsIFrame::BaselineBOffset(mozilla::WritingMode aWM, + BaselineSharingGroup aBaselineGroup, + AlignmentContext aAlignmentContext) const { + MOZ_ASSERT(!aWM.IsOrthogonalTo(GetWritingMode())); + nscoord baseline; + if (GetNaturalBaselineBOffset(aWM, aBaselineGroup, &baseline)) { + return baseline; + } + if (aAlignmentContext == AlignmentContext::Inline) { + return SynthesizeBaselineBOffsetFromMarginBox(aWM, aBaselineGroup); + } + if (aAlignmentContext == AlignmentContext::Table) { + return SynthesizeBaselineBOffsetFromContentBox(aWM, aBaselineGroup); + } + return SynthesizeBaselineBOffsetFromBorderBox(aWM, aBaselineGroup); +} + +void nsIFrame::PropagateWritingModeToSelfAndAncestors( + mozilla::WritingMode aWM) { + MOZ_ASSERT(IsCanvasFrame()); + for (auto f = this; f; f = f->GetParent()) { + f->mWritingMode = aWM; + } +} + +nsContainerFrame* nsIFrame::GetInFlowParent() const { + if (HasAnyStateBits(NS_FRAME_OUT_OF_FLOW)) { + nsIFrame* ph = + FirstContinuation()->GetProperty(nsIFrame::PlaceholderFrameProperty()); + return ph->GetParent(); + } + + return GetParent(); +} + +// We generally want to follow the style tree for preserve-3d, jumping through +// display: contents. +// +// There are various fun mismatches between the flattened tree and the frame +// tree which makes this non-trivial to do looking at the frame tree state: +// +// - Anon boxes. You'd have to step through them, because you generally want to +// ignore them. +// +// - IB-splits, which produce a frame tree where frames for the block inside +// the inline are not children of any frame from the inline. +// +// - display: contents, which makes DOM ancestors not have frames even when a +// descendant does. +// +// See GetFlattenedTreeParentElementForStyle for the difference between it and +// plain GetFlattenedTreeParentElement. +nsIFrame* nsIFrame::GetClosestFlattenedTreeAncestorPrimaryFrame() const { + if (!mContent) { + return nullptr; + } + mozilla::dom::Element* parent = + mContent->GetFlattenedTreeParentElementForStyle(); + while (parent) { + if (nsIFrame* frame = parent->GetPrimaryFrame()) { + return frame; + } + // NOTE(emilio): This should be an assert except we have code in tree which + // violates invariants like the <frameset> frame construction code. + if (MOZ_UNLIKELY(!parent->IsDisplayContents())) { + return nullptr; + } + parent = parent->GetFlattenedTreeParentElementForStyle(); + } + return nullptr; +} + +nsPoint nsIFrame::GetNormalPosition(bool* aHasProperty) const { + nsPoint* normalPosition = GetProperty(NormalPositionProperty()); + if (normalPosition) { + if (aHasProperty) { + *aHasProperty = true; + } + return *normalPosition; + } + if (aHasProperty) { + *aHasProperty = false; + } + return GetPosition(); +} + +mozilla::LogicalPoint nsIFrame::GetLogicalNormalPosition( + mozilla::WritingMode aWritingMode, const nsSize& aContainerSize) const { + // Subtract the size of this frame from the container size to get + // the correct position in rtl frames where the origin is on the + // right instead of the left + return mozilla::LogicalPoint(aWritingMode, GetNormalPosition(), + aContainerSize - mRect.Size()); +} + +#endif |