forked from mirrors/gecko-dev
319 lines
12 KiB
C++
319 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code is subject to the terms of the Mozilla Public License
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* version 2.0 (the "License"). You can obtain a copy of the License at
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* http://mozilla.org/MPL/2.0/. */
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/* rendering object for CSS "display: grid | inline-grid" */
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#ifndef nsGridContainerFrame_h___
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#define nsGridContainerFrame_h___
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#include "mozilla/Maybe.h"
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#include "mozilla/TypeTraits.h"
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#include "nsContainerFrame.h"
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#include "nsHashKeys.h"
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#include "nsTHashtable.h"
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/**
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* Factory function.
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* @return a newly allocated nsGridContainerFrame (infallible)
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*/
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nsContainerFrame* NS_NewGridContainerFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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namespace mozilla {
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/**
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* The number of implicit / explicit tracks and their sizes.
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*/
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struct ComputedGridTrackInfo
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{
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ComputedGridTrackInfo(uint32_t aNumLeadingImplicitTracks,
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uint32_t aNumExplicitTracks,
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uint32_t aStartFragmentTrack,
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uint32_t aEndFragmentTrack,
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nsTArray<nscoord>&& aPositions,
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nsTArray<nscoord>&& aSizes,
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nsTArray<uint32_t>&& aStates)
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: mNumLeadingImplicitTracks(aNumLeadingImplicitTracks)
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, mNumExplicitTracks(aNumExplicitTracks)
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, mStartFragmentTrack(aStartFragmentTrack)
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, mEndFragmentTrack(aEndFragmentTrack)
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, mPositions(aPositions)
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, mSizes(aSizes)
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, mStates(aStates)
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{}
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uint32_t mNumLeadingImplicitTracks;
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uint32_t mNumExplicitTracks;
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uint32_t mStartFragmentTrack;
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uint32_t mEndFragmentTrack;
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nsTArray<nscoord> mPositions;
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nsTArray<nscoord> mSizes;
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nsTArray<uint32_t> mStates;
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};
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struct ComputedGridLineInfo
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{
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explicit ComputedGridLineInfo(nsTArray<nsTArray<nsString>>&& aNames)
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: mNames(aNames)
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{}
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nsTArray<nsTArray<nsString>> mNames;
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};
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} // namespace mozilla
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class nsGridContainerFrame final : public nsContainerFrame
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{
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public:
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NS_DECL_FRAMEARENA_HELPERS
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NS_DECL_QUERYFRAME_TARGET(nsGridContainerFrame)
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NS_DECL_QUERYFRAME
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typedef mozilla::ComputedGridTrackInfo ComputedGridTrackInfo;
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typedef mozilla::ComputedGridLineInfo ComputedGridLineInfo;
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// nsIFrame overrides
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void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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nscoord GetMinISize(nsRenderingContext* aRenderingContext) override;
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nscoord GetPrefISize(nsRenderingContext* aRenderingContext) override;
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void MarkIntrinsicISizesDirty() override;
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nsIAtom* GetType() const override;
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bool IsFrameOfType(uint32_t aFlags) const override
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{
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return nsContainerFrame::IsFrameOfType(aFlags &
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~nsIFrame::eCanContainOverflowContainers);
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}
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override;
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#ifdef DEBUG_FRAME_DUMP
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nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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// nsContainerFrame overrides
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bool DrainSelfOverflowList() override;
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void AppendFrames(ChildListID aListID, nsFrameList& aFrameList) override;
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void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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void RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) override;
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#ifdef DEBUG
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void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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#endif
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/**
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* Return the containing block for aChild which MUST be an abs.pos. child
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* of a grid container. This is just a helper method for
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* nsAbsoluteContainingBlock::Reflow - it's not meant to be used elsewhere.
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*/
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static const nsRect& GridItemCB(nsIFrame* aChild);
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(GridItemContainingBlockRect, nsRect)
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/**
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* These properties are created by a call to
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* nsGridContainerFrame::GetGridFrameWithComputedInfo, typically from
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* Element::GetGridFragments.
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*/
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(GridColTrackInfo, ComputedGridTrackInfo)
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const ComputedGridTrackInfo* GetComputedTemplateColumns()
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{
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const ComputedGridTrackInfo* info = Properties().Get(GridColTrackInfo());
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MOZ_ASSERT(info, "Property generation wasn't requested.");
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return info;
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}
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(GridRowTrackInfo, ComputedGridTrackInfo)
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const ComputedGridTrackInfo* GetComputedTemplateRows()
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{
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const ComputedGridTrackInfo* info = Properties().Get(GridRowTrackInfo());
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MOZ_ASSERT(info, "Property generation wasn't requested.");
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return info;
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}
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(GridColumnLineInfo, ComputedGridLineInfo)
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const ComputedGridLineInfo* GetComputedTemplateColumnLines()
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{
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const ComputedGridLineInfo* info = Properties().Get(GridColumnLineInfo());
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MOZ_ASSERT(info, "Property generation wasn't requested.");
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return info;
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}
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(GridRowLineInfo, ComputedGridLineInfo)
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const ComputedGridLineInfo* GetComputedTemplateRowLines()
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{
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const ComputedGridLineInfo* info = Properties().Get(GridRowLineInfo());
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MOZ_ASSERT(info, "Property generation wasn't requested.");
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return info;
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}
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typedef nsTHashtable<nsStringHashKey> ImplicitNamedAreas;
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(ImplicitNamedAreasProperty,
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ImplicitNamedAreas)
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ImplicitNamedAreas* GetImplicitNamedAreas() const {
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return Properties().Get(ImplicitNamedAreasProperty());
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}
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typedef nsTArray<mozilla::css::GridNamedArea> ExplicitNamedAreas;
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(ExplicitNamedAreasProperty,
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ExplicitNamedAreas)
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ExplicitNamedAreas* GetExplicitNamedAreas() const {
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return Properties().Get(ExplicitNamedAreasProperty());
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}
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/**
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* Return a containing grid frame, and ensure it has computed grid info
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* @return nullptr if aFrame has no grid container, or frame was destroyed
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* @note this might destroy layout/style data since it may flush layout
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*/
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static nsGridContainerFrame* GetGridFrameWithComputedInfo(nsIFrame* aFrame);
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struct TrackSize;
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struct GridItemInfo;
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struct GridReflowInput;
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protected:
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static const uint32_t kAutoLine;
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// The maximum line number, in the zero-based translated grid.
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static const uint32_t kTranslatedMaxLine;
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typedef mozilla::LogicalPoint LogicalPoint;
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typedef mozilla::LogicalRect LogicalRect;
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typedef mozilla::LogicalSize LogicalSize;
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typedef mozilla::WritingMode WritingMode;
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typedef mozilla::css::GridNamedArea GridNamedArea;
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typedef mozilla::layout::AutoFrameListPtr AutoFrameListPtr;
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typedef nsLayoutUtils::IntrinsicISizeType IntrinsicISizeType;
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struct Grid;
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struct GridArea;
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class GridItemCSSOrderIterator;
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class LineNameMap;
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struct LineRange;
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struct SharedGridData;
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struct TrackSizingFunctions;
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struct Tracks;
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struct TranslatedLineRange;
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friend nsContainerFrame* NS_NewGridContainerFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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explicit nsGridContainerFrame(nsStyleContext* aContext)
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: nsContainerFrame(aContext)
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, mCachedMinISize(NS_INTRINSIC_WIDTH_UNKNOWN)
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, mCachedPrefISize(NS_INTRINSIC_WIDTH_UNKNOWN)
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{}
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/**
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* XXX temporary - move the ImplicitNamedAreas stuff to the style system.
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* The implicit area names that come from x-start .. x-end lines in
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* grid-template-columns / grid-template-rows are stored in this frame
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* property when needed, as a ImplicitNamedAreas* value.
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*/
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void InitImplicitNamedAreas(const nsStylePosition* aStyle);
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void AddImplicitNamedAreas(const nsTArray<nsTArray<nsString>>& aLineNameLists);
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/**
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* Reflow and place our children.
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* @return the consumed size of all of this grid container's continuations
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* so far including this frame
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*/
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nscoord ReflowChildren(GridReflowInput& aState,
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const LogicalRect& aContentArea,
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ReflowOutput& aDesiredSize,
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nsReflowStatus& aStatus);
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/**
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* Helper for GetMinISize / GetPrefISize.
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*/
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nscoord IntrinsicISize(nsRenderingContext* aRenderingContext,
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IntrinsicISizeType aConstraint);
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// Helper for AppendFrames / InsertFrames.
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void NoteNewChildren(ChildListID aListID, const nsFrameList& aFrameList);
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// Helper to move child frames into the kOverflowList.
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void MergeSortedOverflow(nsFrameList& aList);
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// Helper to move child frames into the kExcessOverflowContainersList:.
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void MergeSortedExcessOverflowContainers(nsFrameList& aList);
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#ifdef DEBUG
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void SanityCheckGridItemsBeforeReflow() const;
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#endif // DEBUG
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private:
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// Helpers for ReflowChildren
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struct Fragmentainer {
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/**
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* The distance from the first grid container fragment's block-axis content
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* edge to the fragmentainer end.
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*/
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nscoord mToFragmentainerEnd;
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/**
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* True if the current fragment is at the start of the fragmentainer.
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*/
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bool mIsTopOfPage;
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/**
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* Is there a Class C break opportunity at the start content edge?
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*/
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bool mCanBreakAtStart;
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/**
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* Is there a Class C break opportunity at the end content edge?
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*/
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bool mCanBreakAtEnd;
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/**
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* Is the grid container's block-size unconstrained?
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*/
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bool mIsAutoBSize;
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};
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mozilla::Maybe<nsGridContainerFrame::Fragmentainer>
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GetNearestFragmentainer(const GridReflowInput& aState) const;
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// @return the consumed size of all continuations so far including this frame
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nscoord ReflowInFragmentainer(GridReflowInput& aState,
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const LogicalRect& aContentArea,
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ReflowOutput& aDesiredSize,
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nsReflowStatus& aStatus,
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Fragmentainer& aFragmentainer,
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const nsSize& aContainerSize);
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// Helper for ReflowInFragmentainer
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// @return the consumed size of all continuations so far including this frame
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nscoord ReflowRowsInFragmentainer(GridReflowInput& aState,
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const LogicalRect& aContentArea,
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ReflowOutput& aDesiredSize,
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nsReflowStatus& aStatus,
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Fragmentainer& aFragmentainer,
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const nsSize& aContainerSize,
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const nsTArray<const GridItemInfo*>& aItems,
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uint32_t aStartRow,
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uint32_t aEndRow,
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nscoord aBSize,
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nscoord aAvailableSize);
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// Helper for ReflowChildren / ReflowInFragmentainer
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void ReflowInFlowChild(nsIFrame* aChild,
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const GridItemInfo* aGridItemInfo,
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nsSize aContainerSize,
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mozilla::Maybe<nscoord> aStretchBSize,
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const Fragmentainer* aFragmentainer,
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const GridReflowInput& aState,
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const LogicalRect& aContentArea,
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ReflowOutput& aDesiredSize,
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nsReflowStatus& aStatus);
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/**
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* Cached values to optimize GetMinISize/GetPrefISize.
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*/
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nscoord mCachedMinISize;
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nscoord mCachedPrefISize;
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#ifdef DEBUG
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// If true, NS_STATE_GRID_DID_PUSH_ITEMS may be set even though all pushed
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// frames may have been removed. This is used to suppress an assertion
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// in case RemoveFrame removed all associated child frames.
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bool mDidPushItemsBitMayLie;
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#endif
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};
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#endif /* nsGridContainerFrame_h___ */
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