зеркало из https://github.com/mozilla/gecko-dev.git
455 строки
18 KiB
C++
455 строки
18 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsTableFrame_h__
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#define nsTableFrame_h__
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#include "nscore.h"
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#include "nsContainerFrame.h"
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#include "nsStyleCoord.h"
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class nsCellMap;
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class nsVoidArray;
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class nsTableCellFrame;
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class nsTableColFrame;
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class nsTableRowGroupFrame;
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class nsTableRowFrame;
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class nsITableLayoutStrategy;
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class nsHTMLValue;
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class ColumnInfoCache;
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struct InnerTableReflowState;
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struct nsStylePosition;
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struct nsStyleSpacing;
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/* ff1d2780-06d6-11d2-8f37-006008159b0c */
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#define NS_TABLEFRAME_CID \
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{0xff1d2780, 0x06d6, 0x11d2, {0x8f, 0x37, 0x00, 0x60, 0x08, 0x15, 0x9b, 0x0c}}
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extern const nsIID kTableFrameCID;
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/* ============================================================================ */
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/** nsTableFrame maps the inner portion of a table (everything except captions.)
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* Used as a pseudo-frame within nsTableOuterFrame,
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* it may also be used stand-alone as the top-level frame.
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* The meaningful child frames of nsTableFrame map rowgroups.
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*
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* @author sclark
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*
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* TODO: make methods virtual so nsTableFrame can be used as a base class in the future.
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*/
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class nsTableFrame : public nsContainerFrame
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{
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public:
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/** nsTableOuterFrame has intimate knowledge of the inner table frame */
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friend class nsTableOuterFrame;
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/** instantiate a new instance of nsTableFrame.
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* @param aInstancePtrResult the new object is returned in this out-param
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* @param aContent the table object to map
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* @param aParent the parent of the new frame
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*
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* @return NS_OK if the frame was properly allocated, otherwise an error code
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*/
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static nsresult NewFrame(nsIFrame** aInstancePtrResult,
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nsIContent* aContent,
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nsIFrame* aParent);
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// nsISupports
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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/** helper method for getting the width of the table's containing block */
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static nscoord GetTableContainerWidth(const nsReflowState& aState);
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static PRBool TableIsAutoWidth(nsTableFrame *aTableFrame,
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nsIStyleContext *aTableStyle,
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const nsReflowState& aReflowState,
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nscoord& aSpecifiedTableWidth);
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/** @see nsIFrame::Paint */
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NS_IMETHOD Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect);
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/** inner tables are reflowed in two steps.
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* <pre>
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* if mFirstPassValid is false, this is our first time through since content was last changed
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* set pass to 1
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* do pass 1
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* get min/max info for all cells in an infinite space
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* do column balancing
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* set mFirstPassValid to true
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* do pass 2
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* use column widths to Reflow cells
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* </pre>
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*
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* @see ResizeReflowPass1
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* @see ResizeReflowPass2
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* @see BalanceColumnWidths
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* @see nsIFrame::Reflow
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*/
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NS_IMETHOD Reflow(nsIPresContext& aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/** @see nsContainerFrame::CreateContinuingFrame */
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NS_IMETHOD CreateContinuingFrame(nsIPresContext& aPresContext,
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nsIFrame* aParent,
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nsIStyleContext* aStyleContext,
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nsIFrame*& aContinuingFrame);
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/** allow the cell and row attributes to effect the column frame
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* currently, the only reason this exists is to support the HTML "rule"
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* that a width attribute on a cell in the first column sets the column width.
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*/
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virtual NS_METHOD SetColumnStyleFromCell(nsIPresContext * aPresContext,
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nsTableCellFrame* aCellFrame,
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nsTableRowFrame * aRowFrame);
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/** the COLS attribute can be modified by any cell's width attribute.
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* deal with it here. Must be called before any call to
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* ColumnInfoCache::AddColumnInfo
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*/
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virtual void AdjustColumnsForCOLSAttribute();
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/** return the column frame corresponding to the given column index
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* there are two ways to do this, depending on whether we have cached
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* column information yet.
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*/
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NS_METHOD GetColumnFrame(PRInt32 aColIndex, nsTableColFrame *&aColFrame);
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/**
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* DEBUG METHOD
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*
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*/
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//virtual void ListColumnLayoutData(FILE* out = stdout, PRInt32 aIndent = 0) const;
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/** return the width of the column at aColIndex */
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virtual PRInt32 GetColumnWidth(PRInt32 aColIndex);
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/** set the width of the column at aColIndex to aWidth */
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virtual void SetColumnWidth(PRInt32 aColIndex, nscoord aWidth);
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/** helper to get the cell spacing style value */
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virtual nscoord GetCellSpacing();
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/**
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* Calculate Layout Information
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*
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*/
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void AppendLayoutData(nsVoidArray* aList, nsTableCellFrame* aTableCell);
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void RecalcLayoutData();
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// Get cell margin information
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NS_IMETHOD GetCellMarginData(nsTableCellFrame* aKidFrame, nsMargin& aMargin);
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/** get cached column information for a subset of the columns
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*
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* @param aType -- information is returned for the subset of columns with aType style
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* @param aOutNumColumns -- out param, the number of columns matching aType
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* @param aOutColumnIndexes -- out param, the indexes of the columns matching aType
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*
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* TODO : make aOutColumnIndexes safe
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*/
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void GetColumnsByType(const nsStyleUnit aType,
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PRInt32& aOutNumColumns,
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PRInt32 *& aOutColumnIndexes);
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/** return the row span of a cell, taking into account row span magic at the bottom
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* of a table.
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*
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* @param aRowIndex the row from which to measure effective row span
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* @param aCell the cell
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*
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* @return the row span, correcting for row spans that extend beyond the bottom
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* of the table.
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*/
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virtual PRInt32 GetEffectiveRowSpan(PRInt32 aRowIndex, nsTableCellFrame *aCell);
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/** return the col span of a cell, taking into account col span magic at the edge
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* of a table.
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*
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* @param aColIndex the column from which to measure effective col span
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* @param aCell the cell
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*
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* @return the col span, correcting for col spans that extend beyond the edge
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* of the table.
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*/
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virtual PRInt32 GetEffectiveColSpan(PRInt32 aColIndex, nsTableCellFrame *aCell);
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/** return the value of the COLS attribute, adjusted for the
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* actual number of columns in the table
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*/
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PRInt32 GetEffectiveCOLSAttribute();
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protected:
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/** protected constructor.
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* @see NewFrame
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*/
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nsTableFrame(nsIContent* aContent, nsIFrame* aParentFrame);
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/** destructor, responsible for mColumnLayoutData and mColumnWidths */
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virtual ~nsTableFrame();
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/** first pass of ResizeReflow.
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* lays out all table content with aMaxSize(NS_UNCONSTRAINEDSIZE,NS_UNCONSTRAINEDSIZE) and
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* a non-null aMaxElementSize so we get all the metrics we need to do column balancing.
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* Pass 1 only needs to be executed once no matter how many times the table is resized,
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* as long as content and style don't change. This is managed in the member variable mFirstPassIsValid.
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* The layout information for each cell is cached in mColumLayoutData.
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*
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* @see Reflow
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*/
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virtual nsReflowStatus ResizeReflowPass1(nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/** second pass of ResizeReflow.
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* lays out all table content with aMaxSize(computed_table_width, given_table_height)
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* Pass 2 is executed every time the table needs to resize. An optimization is included
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* so that if the table doesn't need to actually be resized, no work is done (see NeedsReflow).
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*
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* @param aMinCaptionWidth - the max of all the minimum caption widths. 0 if no captions.
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* @param aMaxCaptionWidth - the max of all the desired caption widths. 0 if no captions.
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*
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* @see Reflow
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* @see NeedsReflow
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*/
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virtual nsReflowStatus ResizeReflowPass2(nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState,
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PRInt32 aMinCaptionWidth,
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PRInt32 mMaxCaptionWidth);
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nsresult AdjustSiblingsAfterReflow(nsIPresContext* aPresContext,
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InnerTableReflowState& aState,
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nsIFrame* aKidFrame,
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nscoord aDeltaY);
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nscoord GetTopMarginFor(nsIPresContext* aCX,
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InnerTableReflowState& aState,
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const nsMargin& aKidMargin);
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void PlaceChild(nsIPresContext* aPresContext,
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InnerTableReflowState& aState,
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nsIFrame* aKidFrame,
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const nsRect& aKidRect,
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nsSize* aMaxElementSize,
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nsSize& aKidMaxElementSize);
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/**
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* Reflow the frames we've already created
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*
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* @param aPresContext presentation context to use
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* @param aState current inline state
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* @return true if we successfully reflowed all the mapped children and false
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* otherwise, e.g. we pushed children to the next in flow
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*/
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PRBool ReflowMappedChildren(nsIPresContext* aPresContext,
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InnerTableReflowState& aState,
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nsSize* aMaxElementSize);
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/**
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* Try and pull-up frames from our next-in-flow
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*
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* @param aPresContext presentation context to use
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* @param aState current inline state
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* @return true if we successfully pulled-up all the children and false
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* otherwise, e.g. child didn't fit
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*/
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PRBool PullUpChildren(nsIPresContext* aPresContext,
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InnerTableReflowState& aState,
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nsSize* aMaxElementSize);
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/**
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* Create new frames for content we haven't yet mapped
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*
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* @param aPresContext presentation context to use
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* @param aState current inline state
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* @return frComplete if all content has been mapped and frNotComplete
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* if we should be continued
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*/
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nsReflowStatus ReflowUnmappedChildren(nsIPresContext* aPresContext,
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InnerTableReflowState& aState,
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nsSize* aMaxElementSize);
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/** assign widths for each column, taking into account the table content, the effective style,
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* the layout constraints, and the compatibility mode. Sets mColumnWidths as a side effect.
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* @param aPresContext the presentation context
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* @param aTableStyle the resolved style for the table
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* @param aMaxSize the height and width constraints
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* @param aMaxElementSize the min size of the largest indivisible object
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*/
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virtual void BalanceColumnWidths(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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const nsSize& aMaxSize,
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nsSize* aMaxElementSize);
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/** sets the width of the table according to the computed widths of each column. */
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virtual void SetTableWidth(nsIPresContext* aPresContext);
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/**
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*/
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virtual void VerticallyAlignChildren(nsIPresContext* aPresContext,
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nscoord* aAscents,
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nscoord aMaxAscent,
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nscoord aMaxHeight);
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/** given the new parent size, do I really need to do a reflow? */
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virtual PRBool NeedsReflow(const nsSize& aMaxSize);
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/** what stage of reflow is currently in process? */
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virtual PRInt32 GetReflowPass() const;
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/** sets the reflow pass flag. use with caution! */
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virtual void SetReflowPass(PRInt32 aReflowPass);
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/** returns PR_TRUE if the cached pass 1 data is still valid */
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virtual PRBool IsFirstPassValid() const;
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/** do post processing to setting up style information for the frame */
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NS_IMETHOD DidSetStyleContext(nsIPresContext* aPresContext);
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/** Support methods for DidSetStyleContext */
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void MapBorderMarginPadding(nsIPresContext* aPresContext);
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void MapHTMLBorderStyle(nsStyleSpacing& aSpacingStyle, nscoord aBorderWidth);
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PRBool ConvertToPixelValue(nsHTMLValue& aValue, PRInt32 aDefault, PRInt32& aResult);
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/** build as much of the CellMap as possible from the info we have so far
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*/
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virtual void BuildCellMap ();
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/** called whenever the number of columns changes, to increase the storage in mCellMap
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*/
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virtual void GrowCellMap(PRInt32 aColCount);
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/** ResetCellMap is called when the cell structure of the table is changed.
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* Call with caution, only when changing the structure of the table such as
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* inserting or removing rows, changing the rowspan or colspan attribute of a cell, etc.
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*/
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virtual void ResetCellMap ();
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/** Get the cell map for this table frame. It is not always mCellMap.
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* Only the firstInFlow has a legit cell map
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*/
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virtual nsCellMap *GetCellMap();
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/** for debugging only
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* prints out information about the cell map
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*/
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void DumpCellMap();
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/** for debugging only
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* prints out info about the table layout state, printing columns and their cells
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*/
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void ListColumnLayoutData(FILE* out, PRInt32 aIndent);
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/** ResetColumns is called when the column structure of the table is changed.
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* Call with caution, only when adding or removing columns, changing
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* column attributes, changing the rowspan or colspan attribute of a cell, etc.
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*/
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virtual void ResetColumns ();
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/** sum the columns represented by all nsTableColGroup objects.
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* if the cell map says there are more columns than this,
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* add extra implicit columns to the content tree.
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*/
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virtual void EnsureColumns (nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/** Ensure that the cell map has been built for the table
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*/
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virtual void EnsureCellMap();
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virtual void BuildColumnCache(nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/** called every time we discover we have a new cell to add to the table.
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* This could be because we got actual cell content, because of rowspan/colspan attributes, etc.
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* This method changes mCellMap as necessary to account for the new cell.
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*
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* @param aCell the content object created for the cell
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* @param aRowIndex the row into which the cell is to be inserted
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* @param aColIndex the col into which the cell is to be inserted
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*/
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virtual void BuildCellIntoMap (nsTableCellFrame *aCell, PRInt32 aRowIndex, PRInt32 aColIndex);
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/** returns the index of the first child after aStartIndex that is a row group
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*/
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virtual nsTableRowGroupFrame* NextRowGroupFrame (nsTableRowGroupFrame*);
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/** return the number of columns as specified by the input.
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* has 2 side effects:<br>
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* calls SetStartColumnIndex on each nsTableColumn<br>
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* sets mSpecifiedColCount.<br>
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*/
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virtual PRInt32 GetSpecifiedColumnCount ();
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public: /* ----- Cell Map public methods ----- */
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/** returns the number of rows in this table.
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* if mCellMap has been created, it is asked for the number of rows.<br>
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* otherwise, the content is enumerated and the rows are counted.
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*/
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virtual PRInt32 GetRowCount();
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virtual PRInt32 GetColCount();
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/** adjust the col count for screwy table attributes.
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* currently just handles excess colspan at end of table
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*/
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virtual void SetEffectiveColCount();
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nsTableColFrame * GetColFrame(PRInt32 aColIndex);
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nsTableCellFrame * GetCellAt(PRInt32 aRowIndex, PRInt32 aColIndex);
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private:
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void DebugPrintCount() const; // Debugging routine
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/** table reflow is a multi-pass operation. Use these constants to keep track of
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* which pass is currently being executed.
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*/
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enum {kPASS_UNDEFINED=0, kPASS_FIRST=1, kPASS_SECOND=2, kPASS_THIRD=3, kPASS_INCREMENTAL=4};
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PRInt32 *mColumnWidths; // widths of each column
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ColumnInfoCache *mColCache; // cached information about the table columns
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PRBool mFirstPassValid; // PR_TRUE if first pass data is still legit
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PRInt32 mPass; // which Reflow pass are we currently in?
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PRBool mIsInvariantWidth; // PR_TRUE if table width cannot change
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nsITableLayoutStrategy * mTableLayoutStrategy; // the layout strategy for this frame
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PRInt32 mColCount; // the number of columns in this table
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PRInt32 mEffectiveColCount; // the number of columns in this table adjusted for weird table attributes
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nsCellMap* mCellMap; // maintains the relationships between rows, cols, and cells
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};
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#endif
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