forked from mirrors/gecko-dev
251 lines
9.7 KiB
C++
251 lines
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsTableColGroupFrame_h__
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#define nsTableColGroupFrame_h__
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#include "mozilla/Attributes.h"
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#include "nscore.h"
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#include "nsContainerFrame.h"
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#include "nsTableFrame.h"
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#include "mozilla/WritingModes.h"
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class nsTableColFrame;
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/**
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* nsTableColGroupFrame
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* data structure to maintain information about a single table cell's frame
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*/
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class nsTableColGroupFrame final : public nsContainerFrame
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{
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsTableColGroupFrame)
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/** instantiate a new instance of nsTableRowFrame.
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* @param aPresShell the pres shell for this frame
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*
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* @return the frame that was created
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*/
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friend nsTableColGroupFrame* NS_NewTableColGroupFrame(nsIPresShell* aPresShell,
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ComputedStyle* aStyle);
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// nsIFrame overrides
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override
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{
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nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
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if (!aPrevInFlow) {
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mWritingMode = GetTableFrame()->GetWritingMode();
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}
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}
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nsTableFrame* GetTableFrame() const
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{
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nsIFrame* parent = GetParent();
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MOZ_ASSERT(parent && parent->IsTableFrame());
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MOZ_ASSERT(!parent->GetPrevInFlow(),
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"Col group should always be in a first-in-flow table frame");
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return static_cast<nsTableFrame*>(parent);
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}
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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/** A colgroup can be caused by three things:
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* 1) An element with table-column-group display
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* 2) An element with a table-column display without a
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* table-column-group parent
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* 3) Cells that are not in a column (and hence get an anonymous
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* column and colgroup).
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*
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* In practice, we don't need to differentiate between cases (1) and (2),
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* because they both correspond to table-column-group boxes in the spec and
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* hence have observably identical behavior. Case three is flagged as a
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* synthetic colgroup, because it may need to have different behavior in some
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* cases.
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*/
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bool IsSynthetic() const;
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void SetIsSynthetic();
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/** Real in this context are colgroups that come from an element
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* with table-column-group display or wrap around columns that
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* come from an element with table-column display. Colgroups
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* that are the result of wrapping cells in an anonymous
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* column and colgroup are not considered real here.
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* @param aTableFrame - the table parent of the colgroups
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* @return the last real colgroup
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*/
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static nsTableColGroupFrame* GetLastRealColGroup(nsTableFrame* aTableFrame);
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/** @see nsIFrame::DidSetComputedStyle */
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virtual void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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virtual void AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) override;
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virtual void InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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virtual void RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) override;
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/** remove the column aChild from the column group, if requested renumber
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* the subsequent columns in this column group and all following column
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* groups. see also ResetColIndices for this
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* @param aChild - the column frame that needs to be removed
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* @param aResetSubsequentColIndices - if true the columns that follow
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* after aChild will be reenumerated
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*/
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void RemoveChild(nsTableColFrame& aChild,
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bool aResetSubsequentColIndices);
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/** reflow of a column group is a trivial matter of reflowing
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* the col group's children (columns), and setting this frame
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* to 0-size. Since tables are row-centric, column group frames
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* don't play directly in the rendering game. They do however
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* maintain important state that effects table and cell layout.
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*/
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virtual 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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/** Add column frames to the table storages: colframe cache and cellmap
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* this doesn't change the mFrames of the colgroup frame.
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* @param aFirstColIndex - the index at which aFirstFrame should be inserted
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* into the colframe cache.
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* @param aResetSubsequentColIndices - the indices of the col frames
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* after the insertion might need
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* an update
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* @param aCols - an iterator that can be used to iterate over the col
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* frames to be added. Once this is done, the frames on the
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* sbling chain of its .get() at that point will still need
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* their col indices updated.
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* @result - if there is no table frame or the table frame is not
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* the first in flow it will return an error
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*/
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nsresult AddColsToTable(int32_t aFirstColIndex,
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bool aResetSubsequentColIndices,
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const nsFrameList::Slice& aCols);
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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void Dump(int32_t aIndent);
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#endif
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/** returns the number of columns represented by this group.
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* if there are col children, count them (taking into account the span of each)
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* else, check my own span attribute.
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*/
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virtual int32_t GetColCount() const;
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/** first column on the child list */
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nsTableColFrame * GetFirstColumn();
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/** next sibling to aChildFrame that is a column frame, first column frame
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* in the column group if aChildFrame is null
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*/
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nsTableColFrame * GetNextColumn(nsIFrame *aChildFrame);
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/** @return - the position of the first column in this colgroup in the table
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* colframe cache.
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*/
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int32_t GetStartColumnIndex();
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/** set the position of the first column in this colgroup in the table
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* colframe cache.
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*/
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void SetStartColumnIndex(int32_t aIndex);
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/** helper method to get the span attribute for this colgroup */
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int32_t GetSpan();
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/** provide access to the mFrames list
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*/
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nsFrameList& GetWritableChildList();
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/** set the column index for all frames starting at aStartColFrame, it
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* will also reset the column indices in all subsequent colgroups
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* @param aFirstColGroup - start the reset operation inside this colgroup
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* @param aFirstColIndex - first column that is reset should get this index
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* @param aStartColFrame - if specified the reset starts with this column
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* inside the colgroup; if not specified, the reset
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* starts with the first column
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*/
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static void ResetColIndices(nsIFrame* aFirstColGroup,
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int32_t aFirstColIndex,
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nsIFrame* aStartColFrame = nullptr);
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/**
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* Gets inner border widths before collapsing with cell borders
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* Caller must get istart border from previous column
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* GetContinuousBCBorderWidth will not overwrite aBorder.IStart
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* see nsTablePainter about continuous borders
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*/
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void GetContinuousBCBorderWidth(mozilla::WritingMode aWM,
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mozilla::LogicalMargin& aBorder);
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/**
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* Set full border widths before collapsing with cell borders
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* @param aForSide - side to set; only accepts bstart and bend
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*/
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void SetContinuousBCBorderWidth(mozilla::LogicalSide aForSide,
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BCPixelSize aPixelValue);
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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return nsContainerFrame::IsFrameOfType(aFlags & ~(nsIFrame::eTablePart));
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}
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virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0, bool aRebuildDisplayItems = true) override;
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virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0, bool aRebuildDisplayItems = true) override;
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virtual void InvalidateFrameForRemoval() override { InvalidateFrameSubtree(); }
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protected:
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explicit nsTableColGroupFrame(ComputedStyle* aStyle);
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void InsertColsReflow(int32_t aColIndex,
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const nsFrameList::Slice& aCols);
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virtual LogicalSides GetLogicalSkipSides(const ReflowInput* aReflowInput = nullptr) const override;
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// data members
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int32_t mColCount;
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// the starting column index this col group represents. Must be >= 0.
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int32_t mStartColIndex;
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// border width in pixels
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BCPixelSize mBStartContBorderWidth;
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BCPixelSize mBEndContBorderWidth;
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};
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inline nsTableColGroupFrame::nsTableColGroupFrame(ComputedStyle* aStyle)
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: nsContainerFrame(aStyle, kClassID)
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, mColCount(0)
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, mStartColIndex(0)
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{
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}
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inline int32_t nsTableColGroupFrame::GetStartColumnIndex()
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{
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return mStartColIndex;
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}
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inline void nsTableColGroupFrame::SetStartColumnIndex (int32_t aIndex)
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{
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mStartColIndex = aIndex;
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}
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inline int32_t nsTableColGroupFrame::GetColCount() const
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{
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return mColCount;
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}
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inline nsFrameList& nsTableColGroupFrame::GetWritableChildList()
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{
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return mFrames;
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}
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#endif
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