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gecko/layout/tables/nsTableRowGroupFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsTableRowGroupFrame_h__
#define nsTableRowGroupFrame_h__
#include "nscore.h"
#include "nsHTMLContainerFrame.h"
#include "nsIAtom.h"
#include "nsILineIterator.h"
#include "nsTablePainter.h"
#include "nsTArray.h"
#include "nsCSSAnonBoxes.h"
class nsTableFrame;
class nsTableRowFrame;
class nsTableCellFrame;
struct nsRowGroupReflowState {
const nsHTMLReflowState& reflowState; // Our reflow state
nsTableFrame* tableFrame;
// The available size (computed from the parent)
nsSize availSize;
// Running y-offset
nscoord y;
nsRowGroupReflowState(const nsHTMLReflowState& aReflowState,
nsTableFrame* aTableFrame)
:reflowState(aReflowState), tableFrame(aTableFrame)
{
availSize.width = reflowState.availableWidth;
availSize.height = reflowState.availableHeight;
y = 0;
}
~nsRowGroupReflowState() {}
};
#define NS_ITABLEROWGROUPFRAME_IID \
{ 0xe940e7bc, 0xb534, 0x11d2, \
{ 0x95, 0xa2, 0x0, 0x60, 0xb0, 0xc3, 0x44, 0x14 } }
// use the following bits from nsFrame's frame state
// thead or tfoot should be repeated on every printed page
#define NS_ROWGROUP_REPEATABLE 0x80000000
#define NS_ROWGROUP_HAS_STYLE_HEIGHT 0x40000000
// the next is also used on rows (see nsTableRowGroupFrame::InitRepeatedFrame)
#define NS_REPEATED_ROW_OR_ROWGROUP 0x10000000
#define NS_ROWGROUP_HAS_ROW_CURSOR 0x08000000
#define MIN_ROWS_NEEDING_CURSOR 20
/**
* nsTableRowGroupFrame is the frame that maps row groups
* (HTML tags THEAD, TFOOT, and TBODY). This class cannot be reused
* outside of an nsTableFrame. It assumes that its parent is an nsTableFrame, and
* its children are nsTableRowFrames.
*
* @see nsTableFrame
* @see nsTableRowFrame
*/
class nsTableRowGroupFrame : public nsHTMLContainerFrame, public nsILineIteratorNavigator
{
public:
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
/** instantiate a new instance of nsTableRowFrame.
* @param aPresShell the pres shell for this frame
*
* @return the frame that was created
*/
friend nsIFrame* NS_NewTableRowGroupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
virtual ~nsTableRowGroupFrame();
NS_IMETHOD AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame);
virtual nsMargin GetUsedMargin() const;
virtual nsMargin GetUsedBorder() const;
virtual nsMargin GetUsedPadding() const;
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
/** calls Reflow for all of its child rows.
* Rows are all set to the same width and stacked vertically.
* <P> rows are not split unless absolutely necessary.
*
* @param aDesiredSize width set to width of rows, height set to
* sum of height of rows that fit in aMaxSize.height.
*
* @see nsIFrame::Reflow
*/
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
virtual PRBool IsFrameOfType(PRUint32 aFlags) const
{
return nsHTMLContainerFrame::IsFrameOfType(aFlags &
~nsIFrame::eExcludesIgnorableWhitespace);
}
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::tableRowGroupFrame
*/
virtual nsIAtom* GetType() const;
virtual PRBool IsContainingBlock() const;
nsTableRowFrame* GetFirstRow();
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
/** return the number of child rows (not necessarily == number of child frames) */
PRInt32 GetRowCount();
/** return the table-relative row index of the first row in this rowgroup.
* if there are no rows, -1 is returned.
*/
PRInt32 GetStartRowIndex();
/** Adjust the row indices of all rows whose index is >= aRowIndex.
* @param aRowIndex - start adjusting with this index
* @param aAdjustment - shift the row index by this amount
*/
void AdjustRowIndices(PRInt32 aRowIndex,
PRInt32 anAdjustment);
/**
* Used for header and footer row group frames that are repeated when
* splitting a table frame.
*
* Performs any table specific initialization
*
* @param aHeaderFooterFrame the original header or footer row group frame
* that was repeated
*/
nsresult InitRepeatedFrame(nsPresContext* aPresContext,
nsTableRowGroupFrame* aHeaderFooterFrame);
/**
* Get the total height of all the row rects
*/
nscoord GetHeightBasis(const nsHTMLReflowState& aReflowState);
nsMargin* GetBCBorderWidth(nsMargin& aBorder);
/**
* Gets inner border widths before collapsing with cell borders
* Caller must get top border from previous row group or from table
* GetContinuousBCBorderWidth will not overwrite aBorder.top
* see nsTablePainter about continuous borders
*/
void GetContinuousBCBorderWidth(nsMargin& aBorder);
/**
* Sets full border widths before collapsing with cell borders
* @param aForSide - side to set; only right, left, and bottom valid
*/
void SetContinuousBCBorderWidth(PRUint8 aForSide,
BCPixelSize aPixelValue);
/**
* Adjust to the effect of visibibility:collapse on the row group and
* its children
* @return additional shift upward that should be applied to
* subsequent rowgroups due to rows and this rowgroup
* being collapsed
* @param aYTotalOffset the total amount that the rowgroup is shifted up
* @param aWidth new width of the rowgroup
*/
nscoord CollapseRowGroupIfNecessary(nscoord aYTotalOffset,
nscoord aWidth);
// nsILineIterator methods
public:
// The table row is the equivalent to a line in block layout.
// The nsILineIterator assumes that a line resides in a block, this role is
// fullfilled by the row group. Rows in table are counted relative to the
// table. The row index of row corresponds to the cellmap coordinates. The
// line index with respect to a row group can be computed by substracting the
// row index of the first row in the row group.
/** Get the number of rows in a row group
* @param aResult - pointer that holds the number of lines in a row group
*/
NS_IMETHOD GetNumLines(PRInt32* aResult);
/** @see nsILineIterator.h GetDirection
* @param aIsRightToLeft - true if the table is rtl
*/
NS_IMETHOD GetDirection(PRBool* aIsRightToLeft);
/** Return structural information about a line.
* @param aLineNumber - the index of the row relative to the row group
* If the line-number is invalid then
* aFirstFrameOnLine will be nsnull and
* aNumFramesOnLine will be zero.
* @param aFirstFrameOnLine - the first cell frame that originates in row
* with a rowindex that matches a line number
* @param aNumFramesOnLine - return the numbers of cells originating in
* this row
* @param aLineBounds - rect of the row
* @param aLineFlags - unused set to 0
*/
NS_IMETHOD GetLine(PRInt32 aLineNumber,
nsIFrame** aFirstFrameOnLine,
PRInt32* aNumFramesOnLine,
nsRect& aLineBounds,
PRUint32* aLineFlags);
/** Given a frame that's a child of the rowgroup, find which line its on.
* @param aFrame - frame, should be a row
* @param aIndexResult - row index relative to the row group if this a row
* frame. aIndexResult will be set to -1 if the frame
* cannot be found.
*/
NS_IMETHOD FindLineContaining(nsIFrame* aFrame, PRInt32* aLineNumberResult);
/** not implemented
* the function is also not called in our tree
*/
NS_IMETHOD FindLineAt(nscoord aY, PRInt32* aLineNumberResult);
/** Find the orginating cell frame on a row that is the nearest to the
* coordinate X.
* @param aLineNumber - the index of the row relative to the row group
* @param aX - X coordinate in twips relative to the
* origin of the row group
* @param aFrameFound - pointer to the cellframe
* @param aXIsBeforeFirstFrame - the point is before the first originating
* cellframe
* @param aXIsAfterLastFrame - the point is after the last originating
* cellframe
*/
NS_IMETHOD FindFrameAt(PRInt32 aLineNumber,
nscoord aX,
nsIFrame** aFrameFound,
PRBool* aXIsBeforeFirstFrame,
PRBool* aXIsAfterLastFrame);
#ifdef IBMBIDI
/** Check whether visual and logical order of cell frames within a line are
* identical. As the layout will reorder them this is always the case
* @param aLine - the index of the row relative to the table
* @param aIsReordered - returns false
* @param aFirstVisual - if the table is rtl first originating cell frame
* @param aLastVisual - if the table is rtl last originating cell frame
*/
NS_IMETHOD CheckLineOrder(PRInt32 aLine,
PRBool *aIsReordered,
nsIFrame **aFirstVisual,
nsIFrame **aLastVisual);
#endif
/** Find the next originating cell frame that originates in the row.
* @param aFrame - cell frame to start with, will return the next cell
* originating in a row
* @param aLineNumber - the index of the row relative to the table
*/
NS_IMETHOD GetNextSiblingOnLine(nsIFrame*& aFrame, PRInt32 aLineNumber);
// row cursor methods to speed up searching for the row(s)
// containing a point. The basic idea is that we set the cursor
// property if the rows' y and yMosts are non-decreasing (considering only
// rows with nonempty overflowAreas --- empty overflowAreas never participate
// in event handling or painting), and the rowgroup has sufficient number of
// rows. The cursor property points to a "recently used" row. If we get a
// series of requests that work on rows "near" the cursor, then we can find
// those nearby rows quickly by starting our search at the cursor.
// This code is based on the line cursor code in nsBlockFrame. It's more general
// though, and could be extracted and used elsewhere.
struct FrameCursorData {
nsTArray<nsIFrame*> mFrames;
PRUint32 mCursorIndex;
nscoord mOverflowAbove;
nscoord mOverflowBelow;
FrameCursorData()
: mFrames(MIN_ROWS_NEEDING_CURSOR), mCursorIndex(0), mOverflowAbove(0),
mOverflowBelow(0) {}
PRBool AppendFrame(nsIFrame* aFrame);
void FinishBuildingCursor() {
mFrames.Compact();
}
};
// Clear out row cursor because we're disturbing the rows (e.g., Reflow)
void ClearRowCursor();
/**
* Get the first row that might contain y-coord 'aY', or nsnull if you must search
* all rows.
* The actual row returned might not contain 'aY', but if not, it is guaranteed
* to be before any row which does contain 'aY'.
* aOverflowAbove is the maximum over all rows of -row.GetOverflowRect().y.
* To find all rows that intersect the vertical interval aY/aYMost, call
* GetFirstRowContaining(aY, &overflowAbove), and then iterate through all
* rows until reaching a row where row->GetRect().y - overflowAbove >= aYMost.
* That row and all subsequent rows cannot intersect the interval.
*/
nsIFrame* GetFirstRowContaining(nscoord aY, nscoord* aOverflowAbove);
/**
* Set up the row cursor. After this, call AppendFrame for every
* child frame in sibling order. Ensure that the child frame y and YMost values
* form non-decreasing sequences (should always be true for table rows);
* if this is violated, call ClearRowCursor(). If we return nsnull, then we
* decided not to use a cursor or we already have one set up.
*/
FrameCursorData* SetupRowCursor();
PRBool IsScrolled() {
// Note that if mOverflowY is CLIP, so is mOverflowX, and we need to clip the background
// as if the rowgroup is scrollable.
return GetStyleContext()->GetPseudoType() == nsCSSAnonBoxes::scrolledContent ||
GetStyleDisplay()->mOverflowY == NS_STYLE_OVERFLOW_CLIP;
}
protected:
nsTableRowGroupFrame(nsStyleContext* aContext);
void InitChildReflowState(nsPresContext& aPresContext,
PRBool aBorderCollapse,
nsHTMLReflowState& aReflowState);
/** implement abstract method on nsHTMLContainerFrame */
virtual PRIntn GetSkipSides() const;
void PlaceChild(nsPresContext* aPresContext,
nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame,
nsHTMLReflowMetrics& aDesiredSize,
const nsRect& aOriginalKidRect,
const nsRect& aOriginalKidOverflowRect);
void CalculateRowHeights(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState);
void DidResizeRows(nsHTMLReflowMetrics& aDesiredSize);
void SlideChild(nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame);
/**
* Reflow the frames we've already created
*
* @param aPresContext presentation context to use
* @param aReflowState current inline state
* @return true if we successfully reflowed all the mapped children and false
* otherwise, e.g. we pushed children to the next in flow
*/
NS_METHOD ReflowChildren(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus,
PRBool* aPageBreakBeforeEnd = nsnull);
nsresult SplitRowGroup(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame* aTableFrame,
nsReflowStatus& aStatus);
void SplitSpanningCells(nsPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsTableRowFrame& aFirstRow,
nsTableRowFrame& aLastRow,
PRBool aFirstRowIsTopOfPage,
nscoord aSpanningRowBottom,
nsTableRowFrame*& aContRowFrame,
nsTableRowFrame*& aFirstTruncatedRow,
nscoord& aDesiredHeight);
void CreateContinuingRowFrame(nsPresContext& aPresContext,
nsIFrame& aRowFrame,
nsIFrame** aContRowFrame);
PRBool IsSimpleRowFrame(nsTableFrame* aTableFrame,
nsIFrame* aFrame);
void GetNextRowSibling(nsIFrame** aRowFrame);
void UndoContinuedRow(nsPresContext* aPresContext,
nsTableRowFrame* aRow);
private:
// border widths in pixels in the collapsing border model
BCPixelSize mRightContBorderWidth;
BCPixelSize mBottomContBorderWidth;
BCPixelSize mLeftContBorderWidth;
public:
virtual nsIFrame* GetFirstFrame() { return mFrames.FirstChild(); }
virtual nsIFrame* GetLastFrame() { return mFrames.LastChild(); }
virtual void GetNextFrame(nsIFrame* aFrame,
nsIFrame** aResult) { *aResult = aFrame->GetNextSibling(); }
PRBool IsRepeatable() const;
void SetRepeatable(PRBool aRepeatable);
PRBool HasStyleHeight() const;
void SetHasStyleHeight(PRBool aValue);
};
inline PRBool nsTableRowGroupFrame::IsRepeatable() const
{
return (mState & NS_ROWGROUP_REPEATABLE) == NS_ROWGROUP_REPEATABLE;
}
inline void nsTableRowGroupFrame::SetRepeatable(PRBool aRepeatable)
{
if (aRepeatable) {
mState |= NS_ROWGROUP_REPEATABLE;
} else {
mState &= ~NS_ROWGROUP_REPEATABLE;
}
}
inline PRBool nsTableRowGroupFrame::HasStyleHeight() const
{
return (mState & NS_ROWGROUP_HAS_STYLE_HEIGHT) == NS_ROWGROUP_HAS_STYLE_HEIGHT;
}
inline void nsTableRowGroupFrame::SetHasStyleHeight(PRBool aValue)
{
if (aValue) {
mState |= NS_ROWGROUP_HAS_STYLE_HEIGHT;
} else {
mState &= ~NS_ROWGROUP_HAS_STYLE_HEIGHT;
}
}
inline void
nsTableRowGroupFrame::GetContinuousBCBorderWidth(nsMargin& aBorder)
{
PRInt32 aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips,
mRightContBorderWidth);
aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips,
mBottomContBorderWidth);
aBorder.left = BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips,
mLeftContBorderWidth);
return;
}
#endif
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