gecko-dev/layout/tables/nsTableCellFrame.h

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/* -*- 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
* 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/. */
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#ifndef nsTableCellFrame_h__
#define nsTableCellFrame_h__
#include "mozilla/Attributes.h"
#include "celldata.h"
#include "imgIContainer.h"
#include "nsITableCellLayout.h"
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#include "nscore.h"
#include "nsContainerFrame.h"
#include "nsStyleContext.h"
#include "nsIPercentBSizeObserver.h"
#include "nsGkAtoms.h"
#include "nsLayoutUtils.h"
#include "nsTArray.h"
#include "nsTableRowFrame.h"
#include "mozilla/WritingModes.h"
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/**
* nsTableCellFrame
* data structure to maintain information about a single table cell's frame
*
* NOTE: frames are not ref counted. We expose addref and release here
* so we can change that decsion in the future. Users of nsITableCellLayout
* should refcount correctly as if this object is being ref counted, though
* no actual support is under the hood.
*
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* @author sclark
*/
class nsTableCellFrame : public nsContainerFrame,
public nsITableCellLayout,
public nsIPercentBSizeObserver
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{
typedef mozilla::gfx::DrawTarget DrawTarget;
typedef mozilla::image::DrawResult DrawResult;
protected:
typedef mozilla::WritingMode WritingMode;
typedef mozilla::LogicalSide LogicalSide;
typedef mozilla::LogicalMargin LogicalMargin;
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public:
NS_DECL_QUERYFRAME_TARGET(nsTableCellFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// default constructor supplied by the compiler
nsTableCellFrame(nsStyleContext* aContext, nsTableFrame* aTableFrame);
~nsTableCellFrame();
nsTableRowFrame* GetTableRowFrame() const
{
nsIFrame* parent = GetParent();
MOZ_ASSERT(parent && parent->GetType() == nsGkAtoms::tableRowFrame);
return static_cast<nsTableRowFrame*>(parent);
}
nsTableFrame* GetTableFrame() const
{
return GetTableRowFrame()->GetTableFrame();
}
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() override;
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#endif
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
/** @see nsIFrame::DidSetStyleContext */
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
#ifdef DEBUG
// Our anonymous block frame is the content insertion frame so these
// methods should never be called:
virtual void AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) override;
virtual void InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) override;
virtual void RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) override;
#endif
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virtual nsContainerFrame* GetContentInsertionFrame() override {
return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
}
virtual nsMargin GetUsedMargin() const override;
virtual void NotifyPercentBSize(const ReflowInput& aReflowInput) override;
virtual bool NeedsToObserve(const ReflowInput& aReflowInput) override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override;
DrawResult PaintCellBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect, nsPoint aPt,
uint32_t aFlags);
virtual nsresult ProcessBorders(nsTableFrame* aFrame,
nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists);
virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
virtual IntrinsicISizeOffsetData IntrinsicISizeOffsets() override;
virtual void Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
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/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::tableCellFrame
*/
virtual nsIAtom* GetType() const override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override;
#endif
// Although the spec doesn't say that writing-mode is not applied to
// table-cells, we still override this method here because we want to
// make effective writing mode of table structure frames consistent
// within a table. The content inside table cells is reflowed by an
// anonymous block, hence their writing mode is not affected.
virtual mozilla::WritingMode GetWritingMode() const override
{ return GetTableFrame()->GetWritingMode(); }
void BlockDirAlignChild(mozilla::WritingMode aWM, nscoord aMaxAscent);
/*
* Get the value of vertical-align adjusted for CSS 2's rules for a
* table cell, which means the result is always
* NS_STYLE_VERTICAL_ALIGN_{TOP,MIDDLE,BOTTOM,BASELINE}.
*/
virtual uint8_t GetVerticalAlign() const;
bool HasVerticalAlignBaseline() const {
return GetVerticalAlign() == NS_STYLE_VERTICAL_ALIGN_BASELINE;
}
bool CellHasVisibleContent(nscoord aBSize,
nsTableFrame* tableFrame,
nsIFrame* kidFrame);
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/**
* Get the first-line baseline of the cell relative to its block-start border
* edge, as if the cell were vertically aligned to the top of the row.
*/
nscoord GetCellBaseline() const;
/**
* return the cell's specified row span. this is what was specified in the
* content model or in the style info, and is always >= 1.
* to get the effective row span (the actual value that applies), use GetEffectiveRowSpan()
* @see nsTableFrame::GetEffectiveRowSpan()
*/
virtual int32_t GetRowSpan();
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// there is no set row index because row index depends on the cell's parent row only
/*---------------- nsITableCellLayout methods ------------------------*/
/**
* return the cell's starting row index (starting at 0 for the first row).
* for continued cell frames the row index is that of the cell's first-in-flow
* and the column index (starting at 0 for the first column
*/
NS_IMETHOD GetCellIndexes(int32_t &aRowIndex, int32_t &aColIndex) override;
/** return the mapped cell's row index (starting at 0 for the first row) */
virtual nsresult GetRowIndex(int32_t &aRowIndex) const override;
/**
* return the cell's specified col span. this is what was specified in the
* content model or in the style info, and is always >= 1.
* to get the effective col span (the actual value that applies), use GetEffectiveColSpan()
* @see nsTableFrame::GetEffectiveColSpan()
*/
virtual int32_t GetColSpan();
/** return the cell's column index (starting at 0 for the first column) */
virtual nsresult GetColIndex(int32_t &aColIndex) const override;
void SetColIndex(int32_t aColIndex);
/** return the available isize given to this frame during its last reflow */
inline nscoord GetPriorAvailISize();
/** set the available isize given to this frame during its last reflow */
inline void SetPriorAvailISize(nscoord aPriorAvailISize);
/** return the desired size returned by this frame during its last reflow */
inline mozilla::LogicalSize GetDesiredSize();
/** set the desired size returned by this frame during its last reflow */
inline void SetDesiredSize(const ReflowOutput & aDesiredSize);
bool GetContentEmpty();
void SetContentEmpty(bool aContentEmpty);
bool HasPctOverBSize();
void SetHasPctOverBSize(bool aValue);
nsTableCellFrame* GetNextCell() const;
virtual LogicalMargin GetBorderWidth(WritingMode aWM) const;
virtual DrawResult PaintBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags);
void DecorateForSelection(DrawTarget* aDrawTarget, nsPoint aPt);
virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override;
virtual bool IsFrameOfType(uint32_t aFlags) const override
{
return nsContainerFrame::IsFrameOfType(aFlags & ~(nsIFrame::eTablePart));
}
virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) override;
virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) override;
virtual void InvalidateFrameForRemoval() override { InvalidateFrameSubtree(); }
protected:
virtual LogicalSides
GetLogicalSkipSides(const ReflowInput* aReflowInput = nullptr) const override;
/**
* GetBorderOverflow says how far the cell's own borders extend
* outside its own bounds. In the separated borders model this should
* just be zero (as it is for most frames), but in the collapsed
* borders model (for which nsBCTableCellFrame overrides this virtual
* method), it considers the extents of the collapsed border.
*/
virtual nsMargin GetBorderOverflow();
friend class nsTableRowFrame;
uint32_t mColIndex; // the starting column for this cell
nscoord mPriorAvailISize; // the avail isize during the last reflow
mozilla::LogicalSize mDesiredSize; // the last desired inline and block size
};
inline nscoord nsTableCellFrame::GetPriorAvailISize()
{ return mPriorAvailISize; }
inline void nsTableCellFrame::SetPriorAvailISize(nscoord aPriorAvailISize)
{ mPriorAvailISize = aPriorAvailISize; }
inline mozilla::LogicalSize nsTableCellFrame::GetDesiredSize()
{ return mDesiredSize; }
inline void nsTableCellFrame::SetDesiredSize(const ReflowOutput & aDesiredSize)
{
mozilla::WritingMode wm = aDesiredSize.GetWritingMode();
mDesiredSize = aDesiredSize.Size(wm).ConvertTo(GetWritingMode(), wm);
}
inline bool nsTableCellFrame::GetContentEmpty()
{
return HasAnyStateBits(NS_TABLE_CELL_CONTENT_EMPTY);
}
inline void nsTableCellFrame::SetContentEmpty(bool aContentEmpty)
{
if (aContentEmpty) {
AddStateBits(NS_TABLE_CELL_CONTENT_EMPTY);
} else {
RemoveStateBits(NS_TABLE_CELL_CONTENT_EMPTY);
}
}
inline bool nsTableCellFrame::HasPctOverBSize()
{
return HasAnyStateBits(NS_TABLE_CELL_HAS_PCT_OVER_BSIZE);
}
inline void nsTableCellFrame::SetHasPctOverBSize(bool aValue)
{
if (aValue) {
AddStateBits(NS_TABLE_CELL_HAS_PCT_OVER_BSIZE);
} else {
RemoveStateBits(NS_TABLE_CELL_HAS_PCT_OVER_BSIZE);
}
}
// nsBCTableCellFrame
class nsBCTableCellFrame final : public nsTableCellFrame
{
typedef mozilla::image::DrawResult DrawResult;
public:
NS_DECL_FRAMEARENA_HELPERS
nsBCTableCellFrame(nsStyleContext* aContext, nsTableFrame* aTableFrame);
~nsBCTableCellFrame();
virtual nsIAtom* GetType() const override;
virtual nsMargin GetUsedBorder() const override;
virtual bool GetBorderRadii(const nsSize& aFrameSize,
const nsSize& aBorderArea,
Sides aSkipSides,
nscoord aRadii[8]) const override;
// Get the *inner half of the border only*, in twips.
virtual LogicalMargin GetBorderWidth(WritingMode aWM) const override;
// Get the *inner half of the border only*, in pixels.
BCPixelSize GetBorderWidth(LogicalSide aSide) const;
// Set the full (both halves) width of the border
void SetBorderWidth(LogicalSide aSide, BCPixelSize aPixelValue);
virtual nsMargin GetBorderOverflow() override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override;
#endif
virtual DrawResult PaintBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags) override;
private:
// These are the entire width of the border (the cell edge contains only
// the inner half, per the macros in nsTablePainter.h).
BCPixelSize mBStartBorder;
BCPixelSize mIEndBorder;
BCPixelSize mBEndBorder;
BCPixelSize mIStartBorder;
};
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#endif