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gecko-dev/layout/tables/nsTableFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsTableFrame_h__
#define nsTableFrame_h__
#include "nscore.h"
#include "nsVoidArray.h"
#include "nsHTMLContainerFrame.h"
#include "nsStyleCoord.h"
#include "nsStyleConsts.h"
#include "nsIStyleContext.h"
#include "nsIFrameReflow.h" // for nsReflowReason enum
#include "nsITableLayout.h"
class nsCellMap;
class nsTableCellFrame;
class nsTableColFrame;
class nsTableRowGroupFrame;
class nsTableRowFrame;
class nsTableColGroupFrame;
class nsITableLayoutStrategy;
class nsHTMLValue;
class ColumnInfoCache;
struct InnerTableReflowState;
struct nsStylePosition;
struct nsStyleSpacing;
/**
* Child list name indices
* @see #GetAdditionalChildListName()
*/
#define NS_TABLE_FRAME_COLGROUP_LIST_INDEX 0
#define NS_TABLE_FRAME_LAST_LIST_INDEX NS_TABLE_FRAME_COLGROUP_LIST_INDEX
struct nsDebugTable
{
static PRBool gRflTableOuter;
static PRBool gRflTable;
static PRBool gRflRowGrp;
static PRBool gRflRow;
static PRBool gRflCell;
static PRBool gRflArea;
};
/* ============================================================================ */
/** nsTableFrame maps the inner portion of a table (everything except captions.)
* Used as a pseudo-frame within nsTableOuterFrame, it may also be used
* stand-alone as the top-level frame.
*
* The flowed child list contains row group frames. There is also an additional
* named child list:
* - "ColGroup-list" which contains the col group frames
*
* @see nsLayoutAtoms::colGroupList
*
* TODO: make methods virtual so nsTableFrame can be used as a base class in the future.
*/
class nsTableFrame : public nsHTMLContainerFrame, public nsITableLayout
{
public:
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
/** nsTableOuterFrame has intimate knowledge of the inner table frame */
friend class nsTableOuterFrame;
/** instantiate a new instance of nsTableFrame.
* @param aResult the new object is returned in this out-param
* @param aContent the table object to map
* @param aParent the parent of the new frame
*
* @return NS_OK if the frame was properly allocated, otherwise an error code
*/
friend nsresult
NS_NewTableFrame(nsIFrame** aResult);
/** sets defaults for table-specific style.
* @see nsIFrame::Init
*/
NS_IMETHOD Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
/** @see nsIFrame::Destroy */
NS_IMETHOD Destroy(nsIPresContext& aPresContext);
NS_IMETHOD AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame);
/** helper method to find the table parent of any table frame object */
// TODO: today, this depends on display types. This should be changed to rely
// on stronger criteria, like an inner table frame atom
static NS_METHOD GetTableFrame(nsIFrame *aSourceFrame, nsTableFrame *& aTableFrame);
/**
* @param aReflowState the context within which we're to determine the table width info
* @param aSpecifiedTableWidth [OUT] if the table is not auto-width,
* aSpecifiedTableWidth iw set to the resolved width.
* @return PR_TRUE if the table is auto-width. value of aSpecifiedTableWidth is undefined.
* PR_FALSE if the table is not auto-width,
* and aSpecifiedTableWidth is set to the resolved width in twips.
*/
PRBool IsAutoWidth(const nsHTMLReflowState& aReflowState,
nscoord& aSpecifiedTableWidth);
/** @return PR_TRUE if aDisplayType represents a rowgroup of any sort
* (header, footer, or body)
*/
PRBool IsRowGroup(PRInt32 aDisplayType) const;
/** Initialize the table frame with a set of children.
* Calls DidAppendRowGroup which calls nsTableRowFrame::InitChildren
* which finally calls back into this table frame to build the cell map.
* Also ensures we have the right number of column frames for the child list.
*
* @see nsIFrame::SetInitialChildList
*/
NS_IMETHOD SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
/** return the first child belonging to the list aListName.
* @see nsIFrame::FirstChild
*/
NS_IMETHOD FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const;
/** @see nsIFrame::GetAdditionalChildListName */
NS_IMETHOD GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom** aListName) const;
/** complete the append of aRowGroupFrame to the table
* this builds the cell map by calling nsTableRowFrame::InitChildren
* which calls back into this table frame to build the cell map.
* @param aRowGroupFrame the row group that was appended.
* note that this method is optimized for content appended, and doesn't
* work for random insertion of row groups. Random insertion must go
* through incremental reflow notifications.
*/
NS_IMETHOD DidAppendRowGroup(nsTableRowGroupFrame *aRowGroupFrame);
/** @see nsIFrame::Paint */
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
/** nsIFrame method overridden to handle table specifics
*/
NS_IMETHOD SetSelected(nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread);
/** inner tables are reflowed in two steps.
* <pre>
* if mFirstPassValid is false, this is our first time through since content was last changed
* set pass to 1
* do pass 1
* get min/max info for all cells in an infinite space
* do column balancing
* set mFirstPassValid to true
* do pass 2
* use column widths to Reflow cells
* </pre>
*
* @see ResizeReflowPass1
* @see ResizeReflowPass2
* @see BalanceColumnWidths
* @see nsIFrameReflow::Reflow
*/
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
/** allow the cell and row attributes to effect the column frame
* currently, the only reason this exists is to support the HTML "rule"
* that a width attribute on a cell in the first column sets the column width.
*/
virtual NS_METHOD SetColumnStyleFromCell(nsIPresContext & aPresContext,
nsTableCellFrame* aCellFrame,
nsTableRowFrame * aRowFrame);
/** the COLS attribute can be modified by any cell's width attribute.
* deal with it here. Must be called before any call to
* ColumnInfoCache::AddColumnInfo
*/
virtual void AdjustColumnsForCOLSAttribute();
/** return the column frame corresponding to the given column index
* there are two ways to do this, depending on whether we have cached
* column information yet.
*/
NS_METHOD GetColumnFrame(PRInt32 aColIndex, nsTableColFrame *&aColFrame);
/** return PR_TRUE if the column width information has been set */
PRBool IsColumnWidthsSet();
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::tableFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
/** @see nsIFrame::GetFrameName */
NS_IMETHOD GetFrameName(nsString& aResult) const;
NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
/** get the max border thickness for each edge */
void GetTableBorder(nsMargin &aBorder);
/** get the border values for the row and column */
void GetTableBorderAt(nsMargin &aBorder, PRInt32 aRowIndex, PRInt32 aColIndex);
/** get the max border thickness for each edge encompassed by the row group */
void GetTableBorderForRowGroup(nsTableRowGroupFrame * aRowGroupFrame, nsMargin &aBorder);
/** return the width of the column at aColIndex */
virtual PRInt32 GetColumnWidth(PRInt32 aColIndex);
/** set the width of the column at aColIndex to aWidth */
virtual void SetColumnWidth(PRInt32 aColIndex, nscoord aWidth);
/** helper to get the border collapse style value */
virtual PRUint8 GetBorderCollapseStyle();
/** helper to get the cell spacing X style value */
virtual nscoord GetCellSpacingX();
/** helper to get the cell spacing Y style value */
virtual nscoord GetCellSpacingY();
/** helper to get the cell padding style value */
virtual nscoord GetCellPadding();
// begin methods for collapsing borders
/** notification that top and bottom borders have been computed */
void DidComputeHorizontalCollapsingBorders(nsIPresContext& aPresContext,
PRInt32 aStartRowIndex,
PRInt32 aEndRowIndex);
/** compute the left and right collapsed borders between aStartRowIndex and aEndRowIndex, inclusive */
void ComputeVerticalCollapsingBorders(nsIPresContext& aPresContext,
PRInt32 aStartRowIndex,
PRInt32 aEndRowIndex);
/** compute the top and bottom collapsed borders between aStartRowIndex and aEndRowIndex, inclusive */
void ComputeHorizontalCollapsingBorders(nsIPresContext& aPresContext,
PRInt32 aStartRowIndex,
PRInt32 aEndRowIndex);
/** compute the left borders for the table objects intersecting at (aRowIndex, aColIndex) */
void ComputeLeftBorderForEdgeAt(nsIPresContext& aPresContext,
PRInt32 aRowIndex,
PRInt32 aColIndex);
/** compute the right border for the table cell at (aRowIndex, aColIndex)
* and the appropriate border for that cell's right neighbor
* (the left border for a neighboring cell, or the right table edge)
*/
void ComputeRightBorderForEdgeAt(nsIPresContext& aPresContext,
PRInt32 aRowIndex,
PRInt32 aColIndex);
/** compute the top borders for the table objects intersecting at (aRowIndex, aColIndex) */
void ComputeTopBorderForEdgeAt(nsIPresContext& aPresContext,
PRInt32 aRowIndex,
PRInt32 aColIndex);
/** compute the bottom border for the table cell at (aRowIndex, aColIndex)
* and the appropriate border for that cell's bottom neighbor
* (the top border for a neighboring cell, or the bottom table edge)
*/
void ComputeBottomBorderForEdgeAt(nsIPresContext& aPresContext,
PRInt32 aRowIndex,
PRInt32 aColIndex);
/** at the time we initially compute collapsing borders, we don't yet have the
* column widths. So we set them as a post-process of the column balancing algorithm.
*/
void SetCollapsingBorderHorizontalEdgeLengths();
/** @return the identifier representing the edge opposite from aEdge (left-right, top-bottom) */
PRUint8 GetOpposingEdge(PRUint8 aEdge);
/** @return the computed width for aSide of aBorder */
nscoord GetWidthForSide(const nsMargin &aBorder, PRUint8 aSide);
/** returns BORDER_PRECEDENT_LOWER if aStyle1 is lower precedent that aStyle2
* BORDER_PRECEDENT_HIGHER if aStyle1 is higher precedent that aStyle2
* BORDER_PRECEDENT_EQUAL if aStyle1 and aStyle2 have the same precedence
* (note, this is not necessarily the same as saying aStyle1==aStyle2)
* according to the CSS-2 collapsing borders for tables precedent rules.
*/
PRUint8 CompareBorderStyles(PRUint8 aStyle1, PRUint8 aStyle2);
/** helper to set the length of an edge for aSide border of this table frame */
void SetBorderEdgeLength(PRUint8 aSide, PRInt32 aIndex, nscoord aLength);
/** Compute the style, width, and color of an edge in a collapsed-border table.
* This method is the CSS2 border conflict resolution algorithm
* The spec says to resolve conflicts in this order:<br>
* 1. any border with the style HIDDEN wins<br>
* 2. the widest border with a style that is not NONE wins<br>
* 3. the border styles are ranked in this order, highest to lowest precedence:<br>
* double, solid, dashed, dotted, ridge, outset, groove, inset<br>
* 4. borders that are of equal width and style (differ only in color) have this precedence:<br>
* cell, row, rowgroup, col, colgroup, table<br>
* 5. if all border styles are NONE, then that's the computed border style.<br>
* This method assumes that the styles were added to aStyles in the reverse precedence order
* of their frame type, so that styles that come later in the list win over style
* earlier in the list if the tie-breaker gets down to #4.
* This method sets the out-param aBorder with the resolved border attributes
*
* @param aSide the side that is being compared
* @param aStyles the resolved styles of the table objects intersecting at aSide
* styles must be added to this list in reverse precedence order
* @param aBorder [OUT] the border edge that we're computing. Results of the computation
* are stored in aBorder: style, color, and width.
* @param aFlipLastSide an indication of what the bordering object is: another cell, or the table itself.
*/
void ComputeCollapsedBorderSegment(PRUint8 aSide,
nsVoidArray * aStyles,
nsBorderEdge& aBorder,
PRBool aFlipLastSide);
// end methods for collapsing borders
void RecalcLayoutData(nsIPresContext& aPresContext);
// Get cell margin information
NS_IMETHOD GetCellMarginData(nsTableCellFrame* aKidFrame, nsMargin& aMargin);
/** get cached column information for a subset of the columns
*
* @param aType -- information is returned for the subset of columns with aType style
* @param aOutNumColumns -- out param, the number of columns matching aType
* @param aOutColumnIndexes -- out param, the indexes of the columns matching aType
*
* TODO : make aOutColumnIndexes safe
*/
void GetColumnsByType(const nsStyleUnit aType,
PRInt32& aOutNumColumns,
PRInt32 *& aOutColumnIndexes);
/** return the row span of a cell, taking into account row span magic at the bottom
* of a table.
*
* @param aRowIndex the row from which to measure effective row span
* @param aCell the cell
*
* @return the row span, correcting for row spans that extend beyond the bottom
* of the table.
*/
virtual PRInt32 GetEffectiveRowSpan(PRInt32 aRowIndex, nsTableCellFrame *aCell);
virtual PRInt32 GetEffectiveRowSpan(nsTableCellFrame *aCell);
/** return the col span of a cell, taking into account col span magic at the edge
* of a table.
*
* @param aColIndex the column from which to measure effective col span
* @param aCell the cell
*
* @return the col span, correcting for col spans that extend beyond the edge
* of the table.
*/
virtual PRInt32 GetEffectiveColSpan(PRInt32 aColIndex, const nsTableCellFrame *aCell) const;
virtual PRInt32 GetEffectiveColSpan(const nsTableCellFrame *aCell) const;
/** return the value of the COLS attribute, adjusted for the
* actual number of columns in the table
*/
PRInt32 GetEffectiveCOLSAttribute();
/** return the index of the next row that is not yet assigned.
* If no row is initialized, 0 is returned.
*/
PRInt32 GetNextAvailRowIndex() const;
/** build as much of the CellMap as possible from the info we have so far
*/
virtual PRInt32 AddCellToTable (nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex);
virtual void RemoveCellFromTable (nsTableCellFrame* aCellFrame,
PRInt32 aRowIndex);
virtual void AddColumnFrame (nsTableColFrame *aColFrame);
static PRBool IsFinalPass(const nsReflowState& aReflowState);
nsTableCellFrame* GetCellInfoAt(PRInt32 aRowX,
PRInt32 aColX,
PRBool* aOriginates = nsnull,
PRInt32* aColSpan = nsnull);
PRInt32 GetNumCellsOriginatingInRow(PRInt32 aRowIndex) const;
PRInt32 GetNumCellsOriginatingInCol(PRInt32 aColIndex) const;
NS_METHOD GetBorderPlusMarginPadding(nsMargin& aResult);
static void DebugReflow(char* aMessage,
const nsIFrame* aFrame,
const nsHTMLReflowState* aState,
const nsHTMLReflowMetrics* aMetrics);
static void DebugGetIndent(const nsIFrame* aFrame,
char* aBuf);
protected:
/** protected constructor.
* @see NewFrame
*/
nsTableFrame();
/** destructor, responsible for mColumnLayoutData and mColumnWidths */
virtual ~nsTableFrame();
/** implement abstract method on nsHTMLContainerFrame */
virtual PRIntn GetSkipSides() const;
virtual PRBool ParentDisablesSelection() const; //override default behavior
/** helper method for determining if this is a nested table or not
* @param aReflowState The reflow state for this inner table frame
* @param aPosition [OUT] The position style struct for the parent table, if nested.
* If not nested, undefined.
* @return PR_TRUE if this table is nested inside another table.
*/
PRBool IsNested(const nsHTMLReflowState& aReflowState, const nsStylePosition *& aPosition) const;
// Sets the starting column index for aColGroupFrame and the siblings frames that
// follow
void SetStartingColumnIndexFor(nsTableColGroupFrame* aColGroupFrame,
PRInt32 aIndex);
// Calculate the starting column index to use for the specified col group frame
PRInt32 CalculateStartingColumnIndexFor(nsTableColGroupFrame* aColGroupFrame);
public:
/** first pass of ResizeReflow.
* lays out all table content with aMaxSize(NS_UNCONSTRAINEDSIZE,NS_UNCONSTRAINEDSIZE) and
* a non-null aMaxElementSize so we get all the metrics we need to do column balancing.
* Pass 1 only needs to be executed once no matter how many times the table is resized,
* as long as content and style don't change. This is managed in the member variable mFirstPassIsValid.
* The layout information for each cell is cached in mColumLayoutData.
* Incremental layout can take advantage of aStartingFrame to pick up where a previous
* ResizeReflowPass1 left off.
*
* @see nsIFrameReflow::Reflow
*/
NS_IMETHOD ResizeReflowPass1(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableRowGroupFrame * aStartingFrame,
nsReflowReason aReason,
PRBool aDoSiblings);
NS_IMETHOD GetTableSpecifiedHeight(nscoord& aHeight, const nsHTMLReflowState& aReflowState);
virtual PRBool RowGroupsShouldBeConstrained() { return PR_FALSE; }
/** do I need to do a reflow? */
virtual PRBool NeedsReflow(const nsHTMLReflowState& aReflowState);
protected:
/** second pass of ResizeReflow.
* lays out all table content with aMaxSize(computed_table_width, given_table_height)
* Pass 2 is executed every time the table needs to resize. An optimization is included
* so that if the table doesn't need to actually be resized, no work is done (see NeedsReflow).
*
* @see nsIFrameReflow::Reflow
*/
NS_IMETHOD ResizeReflowPass2(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// begin incremental reflow methods
/** Incremental Reflow attempts to do column balancing with the minimum number of reflow
* commands to child elements. This is done by processing the reflow command,
* rebalancing column widths (if necessary), then comparing the resulting column widths
* to the prior column widths and reflowing only those cells that require a reflow.
* All incremental reflows go through this method.
*
* @see Reflow
*/
NS_IMETHOD IncrementalReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
/** process an incremental reflow command targeted at a child of this frame.
* @param aNextFrame the next frame in the reflow target chain
* @see nsIFrameReflow::Reflow
*/
NS_IMETHOD IR_TargetIsChild(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
InnerTableReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame * aNextFrame);
/** process an incremental reflow command targeted at this frame.
* @see nsIFrameReflow::Reflow
*/
NS_IMETHOD IR_TargetIsMe(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
InnerTableReflowState& aReflowState,
nsReflowStatus& aStatus);
/** process a style chnaged notification.
* @see nsIFrameReflow::Reflow
* TODO: needs to be optimized for which attribute was actually changed.
*/
NS_IMETHOD IR_StyleChanged(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
InnerTableReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD AdjustSiblingsAfterReflow(nsIPresContext& aPresContext,
InnerTableReflowState& aReflowState,
nsIFrame* aKidFrame,
nsSize* aMaxElementSize,
nscoord aDeltaY);
nsresult RecoverState(InnerTableReflowState& aReflowState,
nsIFrame* aKidFrame,
nsSize* aMaxElementSize);
NS_METHOD AdjustForCollapsingRowGroup(nsIFrame* aRowGroupFrame,
PRInt32& aRowX);
NS_METHOD CollapseRowGroup(nsIFrame* aRowGroupFrame,
const nscoord& aYTotalOffset,
nscoord& aYGroupOffset, PRInt32& aRowX);
NS_METHOD AdjustForCollapsingRows(nsIPresContext& aPresContext,
nscoord& aHeight);
NS_METHOD AdjustForCollapsingCols(nsIPresContext& aPresContext,
nscoord& aWidth);
// end incremental reflow methods
/** return the desired width of this table accounting for the current
* reflow state, and for the table attributes and parent
*/
nscoord ComputeDesiredWidth(const nsHTMLReflowState& aReflowState) const;
/** return the desired height of this table accounting for the current
* reflow state, and for the table attributes and parent
*/
nscoord ComputeDesiredHeight(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nscoord aDefaultHeight);
/** The following two functions are helpers for ComputeDesiredHeight
*/
void DistributeSpaceToCells(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsIFrame* aRowGroupFrame);
void DistributeSpaceToRows(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsIFrame* aRowGroupFrame, const nscoord& aSumOfRowHeights,
const nscoord& aExcess, const nsStyleTable* aTableStyle,
nscoord& aExcessForRowGroup,
nscoord& aRowGroupYPos);
nscoord GetEffectiveContainerHeight(const nsHTMLReflowState& aReflowState);
void PlaceChild(nsIPresContext& aPresContext,
InnerTableReflowState& aReflowState,
nsIFrame* aKidFrame,
const nsRect& aKidRect,
nsSize* aMaxElementSize,
nsSize& aKidMaxElementSize);
/**
* 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_IMETHOD ReflowMappedChildren(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
InnerTableReflowState& aReflowState,
nsReflowStatus& aStatus);
/**
* Try and pull-up frames from our next-in-flow
*
* @param aPresContext presentation context to use
* @param aReflowState current reflow state
* @return true if we successfully pulled-up all the children and false
* otherwise, e.g. child didn't fit
*/
NS_IMETHOD PullUpChildren(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
InnerTableReflowState& aReflowState,
nsReflowStatus& aStatus);
/** assign widths for each column, taking into account the table content, the effective style,
* the layout constraints, and the compatibility mode. Sets mColumnWidths as a side effect.
* @param aPresContext the presentation context
* @param aTableStyle the resolved style for the table
* @param aMaxSize the height and width constraints
* @param aMaxElementSize the min size of the largest indivisible object
*/
virtual void BalanceColumnWidths(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
const nsSize& aMaxSize,
nsSize* aMaxElementSize);
/** sets the width of the table according to the computed widths of each column. */
virtual void SetTableWidth(nsIPresContext& aPresContext);
/** returns PR_TRUE if the cached pass 1 data is still valid */
virtual PRBool IsFirstPassValid() const;
/** returns PR_TRUE if the cached column info is still valid */
virtual PRBool IsColumnCacheValid() const;
/** returns PR_TRUE if the cached column info is still valid */
virtual PRBool IsColumnWidthsValid() const;
nsIFrame* GetFirstBodyRowGroupFrame();
PRBool MoveOverflowToChildList();
void PushChildren(nsIFrame* aFromChild, nsIFrame* aPrevSibling);
public:
// Returns PR_TRUE if there are any cells above the row at
// aRowIndex and spanning into the row at aRowIndex
PRBool RowIsSpannedInto(PRInt32 aRowIndex);
// Returns PR_TRUE if there is a cell originating in aRowIndex
// which spans into the next row
PRBool RowHasSpanningCells(PRInt32 aRowIndex);
// Returns PR_TRUE if there are any cells to the left of the column at
// aColIndex and spanning into the column at aColIndex
PRBool ColIsSpannedInto(PRInt32 aColIndex);
// Returns PR_TRUE if there is a cell originating in aColIndex
// which spans into the next col
PRBool ColHasSpanningCells(PRInt32 aColIndex);
// Returns PR_TRUE if the style width change, aPrevStyleWidth, for aCellFrame
// could require the columns to be rebalanced. This method can be used to
// determine if an incremental reflow on aCellFrame is necessary as the result
// of the style width change. If aConsiderMinWidth is PR_TRUE, then potential
// changes to aCellFrame's min width is considered (however, if considered,
// the function will always return PR_TRUE if the layout strategy is Basic).
PRBool ColumnsCanBeInvalidatedBy(nsStyleCoord* aPrevStyleWidth,
const nsTableCellFrame& aCellFrame) const;
// Returns PR_TRUE if potential width changes to aCellFrame could require the
// columns to be rebalanced. This method can be used after an incremental reflow
// of aCellFrame to determine if a pass1 reflow on aCellFrame is necessary. If
// aConsiderMinWidth is PR_TRUE, then potential changes to aCellFrame's min width
// is considered (however, if considered, the function will always return PR_TRUE
// if the layout strategy is Basic).
PRBool ColumnsCanBeInvalidatedBy(const nsTableCellFrame& aCellFrame,
PRBool aConsiderMinWidth = PR_FALSE) const;
// Returns PR_TRUE if changes to aCellFrame's pass1 min and desired (max) sizes
// don't require the columns to be rebalanced. This method can be used after a
// pass1 reflow of aCellFrame to determine if the columns need rebalancing.
// aPrevCellMin and aPrevCellDes are the values aCellFrame had before the last
// pass1 reflow.
PRBool ColumnsAreValidFor(const nsTableCellFrame& aCellFrame,
nscoord aPrevCellMin,
nscoord aPrevCellDes) const;
virtual void InvalidateFirstPassCache();
virtual void InvalidateColumnCache();
virtual void InvalidateColumnWidths();
protected:
/** Support methods for DidSetStyleContext */
void MapBorderMarginPadding(nsIPresContext& aPresContext);
void MapHTMLBorderStyle(nsStyleSpacing& aSpacingStyle, nscoord aBorderWidth);
PRBool ConvertToPixelValue(nsHTMLValue& aValue, PRInt32 aDefault, PRInt32& aResult);
/** returns PR_TRUE if the cached pass 1 data is still valid */
virtual PRBool IsCellMapValid() const;
public:
/** Get the cell map for this table frame. It is not always mCellMap.
* Only the firstInFlow has a legit cell map
*/
virtual nsCellMap *GetCellMap() const;
/** ResetCellMap is called when the cell structure of the table is changed.
* Call with caution, only when changing the structure of the table such as
* inserting or removing rows, changing the rowspan or colspan attribute of a cell, etc.
*/
virtual void InvalidateCellMap();
/** sum the columns represented by all nsTableColGroup objects.
* if the cell map says there are more columns than this,
* add extra implicit columns to the content tree.
*
* returns whether any implicit column frames were created
*/
virtual void EnsureColumns (nsIPresContext& aPresContext,
PRBool& aCreatedColFrames);
// These methods are used to incrementally insert and remove rows
// from the cell map without having to invalidate the entire map.
NS_IMETHOD InsertRowIntoMap(nsTableRowFrame* aRow, PRInt32 aRowIndex);
NS_IMETHOD RemoveRowFromMap(nsTableRowFrame* aRow, PRInt32 aRowIndex);
NS_IMETHOD AdjustRowIndices(nsIFrame* aRowGroup,
PRInt32 aRowIndex,
PRInt32 anAdjustment);
protected:
/** iterates all child frames and creates a new cell map */
NS_IMETHOD ReBuildCellMap();
void SetColumnDimensions(nscoord aHeight);
#ifdef NS_DEBUG
/** for debugging only
* prints out info about the table layout state, printing columns and their cells
*/
void ListColumnLayoutData(FILE* out, PRInt32 aIndent);
#endif
virtual void BuildColumnCache(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
/** Helper for BuildColumnCache */
virtual void SetColumnStylesFromCells(nsIPresContext& aPresContext, nsIFrame* aRowGroupFrame);
virtual void CacheColFramesInCellMap();
/** return the number of columns as specified by the input.
* has 2 side effects:<br>
* calls SetStartColumnIndex on each nsTableColumn<br>
* sets mSpecifiedColCount.<br>
*/
virtual PRInt32 GetSpecifiedColumnCount ();
/**
* Return aFrame's child if aFrame is an nsScrollFrame, otherwise return aFrame
*/
nsTableRowGroupFrame* GetRowGroupFrameFor(nsIFrame* aFrame, const nsStyleDisplay* aDisplay);
public: /* ----- Cell Map public methods ----- */
/** returns the number of rows in this table.
* if mCellMap has been created, it is asked for the number of rows.<br>
* otherwise, the content is enumerated and the rows are counted.
*/
virtual PRInt32 GetRowCount() const;
/** returns the number of columns in this table after redundant columns have been removed
*/
virtual PRInt32 GetColCount();
/** return the column frame at colIndex.
* returns nsnull if the col frame has not yet been allocated, or if aColIndex is out of range
*/
nsTableColFrame * GetColFrame(PRInt32 aColIndex);
/** return the cell frame at aRowIndex, aColIndex.
* returns nsnull if the cell frame has not yet been allocated,
* or if aRowIndex or aColIndex is out of range
*/
nsTableCellFrame * GetCellFrameAt(PRInt32 aRowIndex, PRInt32 aColIndex);
/** return the minimum width of the table caption. Return 0 if there is no caption. */
nscoord GetMinCaptionWidth();
/** return the minimum contend width of the table (excludes borders and padding).
Return 0 if the min width is unknown. */
nscoord GetMinTableContentWidth();
/** return the maximum content width of the table (excludes borders and padding).
Return 0 if the max width is unknown. */
nscoord GetMaxTableContentWidth();
/** compute the max-element-size for the table
* @param aMaxElementSize [OUT] width field set to the min legal width of the table
*/
void SetMaxElementSize(nsSize* aMaxElementSize);
/** returns PR_TRUE if table layout requires a preliminary pass over the content */
PRBool RequiresPass1Layout();
// compute the height of the table to be used as the basis for
// percentage height cells
void ComputePercentBasisForRows(const nsHTMLReflowState& aReflowState);
nscoord GetPercentBasisForRows();
/*---------------- nsITableLayout methods ------------------------*/
/** Get the cell and associated data for a table cell from the frame's cellmap */
NS_IMETHOD GetCellDataAt(PRInt32 aRowIndex, PRInt32 aColIndex,
nsIDOMElement* &aCell, //out params
PRInt32& aStartRowIndex, PRInt32& aStartColIndex,
PRInt32& aRowSpan, PRInt32& aColSpan,
PRBool& aIsSelected);
/** Get the number of rows and column for a table from the frame's cellmap
* Some rows may not have enough cells (the number returned is the maximum possible),
* which displays as a ragged-right edge table
*/
NS_IMETHOD GetTableSize(PRInt32& aRowCount, PRInt32& aColCount);
/*------------end of nsITableLayout methods -----------------------*/
public:
static nsIAtom* gColGroupAtom;
void Dump(PRBool aDumpCols, PRBool aDumpCellMap);
protected:
void DebugPrintCount() const; // Debugging routine
// data members
PRInt32 *mColumnWidths; // widths of each column
PRInt32 mColumnWidthsLength; // the number of column lengths this frame has allocated
PRBool mColumnWidthsSet; // PR_TRUE if column widths have been set at least once
PRBool mColumnWidthsValid; // PR_TRUE if column width data is still legit, PR_FALSE if it needs to be recalculated
PRBool mFirstPassValid; // PR_TRUE if first pass data is still legit, PR_FALSE if it needs to be recalculated
PRBool mColumnCacheValid; // PR_TRUE if column cache info is still legit, PR_FALSE if it needs to be recalculated
PRBool mCellMapValid; // PR_TRUE if cell map data is still legit, PR_FALSE if it needs to be recalculated
PRBool mIsInvariantWidth; // PR_TRUE if table width cannot change
PRBool mHasScrollableRowGroup; // PR_TRUE if any section has overflow == "auto" or "scroll"
PRInt32 mColCount; // the number of columns in this table
nsCellMap* mCellMap; // maintains the relationships between rows, cols, and cells
ColumnInfoCache *mColCache; // cached information about the table columns
nsITableLayoutStrategy * mTableLayoutStrategy; // the layout strategy for this frame
nsFrameList mColGroups; // the list of colgroup frames
nsBorderEdges mBorderEdges; // one list of border segments for each side of the table frame
// used only for the collapsing border model
nscoord mPercentBasisForRows;
};
inline PRBool nsTableFrame::IsRowGroup(PRInt32 aDisplayType) const
{
return PRBool((NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == aDisplayType) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == aDisplayType) ||
(NS_STYLE_DISPLAY_TABLE_ROW_GROUP == aDisplayType));
}
inline nscoord nsTableFrame::GetPercentBasisForRows()
{
return mPercentBasisForRows;
}
enum nsTableIteration {
eTableLTR = 0,
eTableRTL = 1,
eTableDIR = 2
};
class nsTableIterator
{
public:
nsTableIterator(nsIFrame& aSource,
nsTableIteration aType);
nsTableIterator(nsFrameList& aSource,
nsTableIteration aType);
nsIFrame* First();
nsIFrame* Next();
PRBool IsLeftToRight();
PRInt32 Count();
protected:
void Init(nsIFrame* aFirstChild,
nsTableIteration aType);
PRBool mLeftToRight;
nsIFrame* mFirstListChild;
nsIFrame* mFirstChild;
nsIFrame* mCurrentChild;
PRInt32 mCount;
};
#endif
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