gecko-dev/layout/tables/nsTableCellFrame.h

334 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsTableCellFrame_h__
#define nsTableCellFrame_h__
#include "mozilla/Attributes.h"
#include "celldata.h"
#include "nsITableCellLayout.h"
#include "nscore.h"
#include "nsContainerFrame.h"
#include "nsStyleContext.h"
#include "nsIPercentHeightObserver.h"
#include "nsGkAtoms.h"
#include "nsLayoutUtils.h"
#include "nsTArray.h"
class nsTableFrame;
/**
* Additional frame-state bits
*/
#define NS_TABLE_CELL_CONTENT_EMPTY NS_FRAME_STATE_BIT(31)
#define NS_TABLE_CELL_HAD_SPECIAL_REFLOW NS_FRAME_STATE_BIT(29)
#define NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT NS_FRAME_STATE_BIT(28)
/**
* 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.
*
* @author sclark
*/
class nsTableCellFrame : public nsContainerFrame,
public nsITableCellLayout,
public nsIPercentHeightObserver
{
public:
NS_DECL_QUERYFRAME_TARGET(nsTableCellFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// default constructor supplied by the compiler
nsTableCellFrame(nsStyleContext* aContext);
~nsTableCellFrame();
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#endif
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) MOZ_OVERRIDE;
/** @see nsIFrame::DidSetStyleContext */
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
// table cells contain a block frame which does most of the work, and
// so these functions should never be called. They assert and return
// NS_ERROR_NOT_IMPLEMENTED
NS_IMETHOD AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) MOZ_OVERRIDE;
NS_IMETHOD InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) MOZ_OVERRIDE;
NS_IMETHOD RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) MOZ_OVERRIDE;
virtual nsIFrame* GetContentInsertionFrame() MOZ_OVERRIDE {
return GetFirstPrincipalChild()->GetContentInsertionFrame();
}
virtual nsMargin GetUsedMargin() const MOZ_OVERRIDE;
virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState) MOZ_OVERRIDE;
virtual bool NeedsToObserve(const nsHTMLReflowState& aReflowState) MOZ_OVERRIDE;
/** instantiate a new instance of nsTableRowFrame.
* @param aPresShell the pres shell for this frame
*
* @return the frame that was created
*/
friend nsIFrame* NS_NewTableCellFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
void PaintCellBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect, nsPoint aPt,
uint32_t aFlags);
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual IntrinsicWidthOffsetData
IntrinsicWidthOffsets(nsRenderingContext* aRenderingContext) MOZ_OVERRIDE;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus) MOZ_OVERRIDE;
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::tableCellFrame
*/
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif
void VerticallyAlignChild(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}.
*/
uint8_t GetVerticalAlign() const;
bool HasVerticalAlignBaseline() const {
return GetVerticalAlign() == NS_STYLE_VERTICAL_ALIGN_BASELINE;
}
bool CellHasVisibleContent(nscoord height,
nsTableFrame* tableFrame,
nsIFrame* kidFrame);
/**
* Get the first-line baseline of the cell relative to its top 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();
// 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) MOZ_OVERRIDE;
/** return the mapped cell's row index (starting at 0 for the first row) */
virtual nsresult GetRowIndex(int32_t &aRowIndex) const MOZ_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 MOZ_OVERRIDE;
void SetColIndex(int32_t aColIndex);
/** return the available width given to this frame during its last reflow */
inline nscoord GetPriorAvailWidth();
/** set the available width given to this frame during its last reflow */
inline void SetPriorAvailWidth(nscoord aPriorAvailWidth);
/** return the desired size returned by this frame during its last reflow */
inline nsSize GetDesiredSize();
/** set the desired size returned by this frame during its last reflow */
inline void SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize);
bool GetContentEmpty();
void SetContentEmpty(bool aContentEmpty);
bool HasPctOverHeight();
void SetHasPctOverHeight(bool aValue);
nsTableCellFrame* GetNextCell() const;
virtual nsMargin* GetBorderWidth(nsMargin& aBorder) const;
virtual void PaintBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags);
void DecorateForSelection(nsRenderingContext& aRenderingContext,
nsPoint aPt);
virtual bool UpdateOverflow() MOZ_OVERRIDE;
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
{
return nsContainerFrame::IsFrameOfType(aFlags & ~(nsIFrame::eTablePart));
}
virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
virtual void InvalidateFrameForRemoval() MOZ_OVERRIDE { InvalidateFrameSubtree(); }
protected:
virtual int GetSkipSides(const nsHTMLReflowState* aReflowState= nullptr) const MOZ_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 mPriorAvailWidth; // the avail width during the last reflow
nsSize mDesiredSize; // the last desired width & height
};
inline nscoord nsTableCellFrame::GetPriorAvailWidth()
{ return mPriorAvailWidth;}
inline void nsTableCellFrame::SetPriorAvailWidth(nscoord aPriorAvailWidth)
{ mPriorAvailWidth = aPriorAvailWidth;}
inline nsSize nsTableCellFrame::GetDesiredSize()
{ return mDesiredSize; }
inline void nsTableCellFrame::SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize)
{
mDesiredSize.width = aDesiredSize.width;
mDesiredSize.height = aDesiredSize.height;
}
inline bool nsTableCellFrame::GetContentEmpty()
{
return (mState & NS_TABLE_CELL_CONTENT_EMPTY) ==
NS_TABLE_CELL_CONTENT_EMPTY;
}
inline void nsTableCellFrame::SetContentEmpty(bool aContentEmpty)
{
if (aContentEmpty) {
mState |= NS_TABLE_CELL_CONTENT_EMPTY;
} else {
mState &= ~NS_TABLE_CELL_CONTENT_EMPTY;
}
}
inline bool nsTableCellFrame::HasPctOverHeight()
{
return (mState & NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT) ==
NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT;
}
inline void nsTableCellFrame::SetHasPctOverHeight(bool aValue)
{
if (aValue) {
mState |= NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT;
} else {
mState &= ~NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT;
}
}
// nsBCTableCellFrame
class nsBCTableCellFrame : public nsTableCellFrame
{
public:
NS_DECL_FRAMEARENA_HELPERS
nsBCTableCellFrame(nsStyleContext* aContext);
~nsBCTableCellFrame();
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
virtual nsMargin GetUsedBorder() const MOZ_OVERRIDE;
virtual bool GetBorderRadii(nscoord aRadii[8]) const MOZ_OVERRIDE;
// Get the *inner half of the border only*, in twips.
virtual nsMargin* GetBorderWidth(nsMargin& aBorder) const MOZ_OVERRIDE;
// Get the *inner half of the border only*, in pixels.
BCPixelSize GetBorderWidth(mozilla::css::Side aSide) const;
// Set the full (both halves) width of the border
void SetBorderWidth(mozilla::css::Side aSide, BCPixelSize aPixelValue);
virtual nsMargin GetBorderOverflow() MOZ_OVERRIDE;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif
virtual void PaintBackground(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags) MOZ_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 mTopBorder;
BCPixelSize mRightBorder;
BCPixelSize mBottomBorder;
BCPixelSize mLeftBorder;
};
#endif