gecko-dev/layout/tables/nsTableColFrame.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
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*
* 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
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* ***** END LICENSE BLOCK ***** */
#ifndef nsTableColFrame_h__
#define nsTableColFrame_h__
#include "nscore.h"
#include "nsContainerFrame.h"
#include "nsTablePainter.h"
#include "nsTArray.h"
class nsTableCellFrame;
enum nsTableColType {
eColContent = 0, // there is real col content associated
eColAnonymousCol = 1, // the result of a span on a col
eColAnonymousColGroup = 2, // the result of a span on a col group
eColAnonymousCell = 3 // the result of a cell alone
};
class nsTableColFrame : public nsSplittableFrame {
public:
NS_DECL_FRAMEARENA_HELPERS
enum {eWIDTH_SOURCE_NONE =0, // no cell has contributed to the width style
eWIDTH_SOURCE_CELL =1, // a cell specified a width
eWIDTH_SOURCE_CELL_WITH_SPAN=2 // a cell implicitly specified a width via colspan
};
nsTableColType GetColType() const;
void SetColType(nsTableColType aType);
/** instantiate a new instance of nsTableRowFrame.
* @param aPresShell the pres shell for this frame
*
* @return the frame that was created
*/
friend nsTableColFrame* NS_NewTableColFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
/** @see nsIFrame::DidSetStyleContext */
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
PRInt32 GetColIndex() const;
void SetColIndex (PRInt32 aColIndex);
nsTableColFrame* GetNextCol() const;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
/**
* Table columns never paint anything, nor receive events.
*/
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) { return NS_OK; }
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::tableColFrame
*/
virtual nsIAtom* GetType() const;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual nsSplittableType GetSplittableType() const;
/** return the number of the columns the col represents. always >= 1 */
PRInt32 GetSpan();
/** convenience method, calls into cellmap */
PRInt32 Count() const;
nscoord GetLeftBorderWidth();
void SetLeftBorderWidth(BCPixelSize aWidth);
nscoord GetRightBorderWidth();
void SetRightBorderWidth(BCPixelSize aWidth);
/**
* Gets inner border widths before collapsing with cell borders
* Caller must get left border from previous column or from table
* GetContinuousBCBorderWidth will not overwrite aBorder.left
* see nsTablePainter about continuous borders
*
* @return outer right border width (left inner for next column)
*/
nscoord GetContinuousBCBorderWidth(nsMargin& aBorder);
/**
* Set full border widths before collapsing with cell borders
* @param aForSide - side to set; only valid for top, right, and bottom
*/
void SetContinuousBCBorderWidth(PRUint8 aForSide,
BCPixelSize aPixelValue);
#ifdef DEBUG
void Dump(PRInt32 aIndent);
#endif
/**
* Restore the default values of the intrinsic widths, so that we can
* re-accumulate intrinsic widths from the cells in the column.
*/
void ResetIntrinsics() {
mMinCoord = 0;
mPrefCoord = 0;
mPrefPercent = 0.0f;
mHasSpecifiedCoord = false;
}
/**
* Restore the default value of the preferred percentage width (the
* only intrinsic width used by FixedTableLayoutStrategy.
*/
void ResetPrefPercent() {
mPrefPercent = 0.0f;
}
/**
* Restore the default values of the temporary buffer for
* spanning-cell intrinsic widths (as we process spanning cells).
*/
void ResetSpanIntrinsics() {
mSpanMinCoord = 0;
mSpanPrefCoord = 0;
mSpanPrefPercent = 0.0f;
}
/**
* Add the widths for a cell or column element, or the contribution of
* the widths from a column-spanning cell:
* @param aMinCoord The minimum intrinsic width
* @param aPrefCoord The preferred intrinsic width or, if there is a
* specified non-percentage width, max(specified width, minimum intrinsic
* width).
* @param aHasSpecifiedCoord Whether there is a specified
* non-percentage width.
*
* Note that the implementation of this functions is a bit tricky
* since mPrefCoord means different things depending on
* whether mHasSpecifiedCoord is true (and likewise for aPrefCoord and
* aHasSpecifiedCoord). If mHasSpecifiedCoord is false, then
* all widths added had aHasSpecifiedCoord false and mPrefCoord is the
* largest of the pref widths. But if mHasSpecifiedCoord is true,
* then mPrefCoord is the largest of (1) the pref widths for cells
* with aHasSpecifiedCoord true and (2) the min widths for cells with
* aHasSpecifiedCoord false.
*/
void AddCoords(nscoord aMinCoord, nscoord aPrefCoord,
bool aHasSpecifiedCoord) {
NS_ASSERTION(aMinCoord <= aPrefCoord, "intrinsic widths out of order");
if (aHasSpecifiedCoord && !mHasSpecifiedCoord) {
mPrefCoord = mMinCoord;
mHasSpecifiedCoord = true;
}
if (!aHasSpecifiedCoord && mHasSpecifiedCoord) {
aPrefCoord = aMinCoord; // NOTE: modifying argument
}
if (aMinCoord > mMinCoord)
mMinCoord = aMinCoord;
if (aPrefCoord > mPrefCoord)
mPrefCoord = aPrefCoord;
NS_ASSERTION(mMinCoord <= mPrefCoord, "min larger than pref");
}
/**
* Add a percentage width specified on a cell or column element or the
* contribution to this column of a percentage width specified on a
* column-spanning cell.
*/
void AddPrefPercent(float aPrefPercent) {
if (aPrefPercent > mPrefPercent)
mPrefPercent = aPrefPercent;
}
/**
* Get the largest minimum intrinsic width for this column.
*/
nscoord GetMinCoord() const { return mMinCoord; }
/**
* Get the largest preferred width for this column, or, if there were
* any specified non-percentage widths (see GetHasSpecifiedCoord), the
* largest minimum intrinsic width or specified width.
*/
nscoord GetPrefCoord() const { return mPrefCoord; }
/**
* Get whether there were any specified widths contributing to this
* column.
*/
bool GetHasSpecifiedCoord() const { return mHasSpecifiedCoord; }
/**
* Get the largest specified percentage width contributing to this
* column (returns 0 if there were none).
*/
float GetPrefPercent() const { return mPrefPercent; }
/**
* Like AddCoords, but into a temporary buffer used for groups of
* column-spanning cells.
*/
void AddSpanCoords(nscoord aSpanMinCoord, nscoord aSpanPrefCoord,
bool aSpanHasSpecifiedCoord) {
NS_ASSERTION(aSpanMinCoord <= aSpanPrefCoord,
"intrinsic widths out of order");
if (!aSpanHasSpecifiedCoord && mHasSpecifiedCoord) {
aSpanPrefCoord = aSpanMinCoord; // NOTE: modifying argument
}
if (aSpanMinCoord > mSpanMinCoord)
mSpanMinCoord = aSpanMinCoord;
if (aSpanPrefCoord > mSpanPrefCoord)
mSpanPrefCoord = aSpanPrefCoord;
NS_ASSERTION(mSpanMinCoord <= mSpanPrefCoord, "min larger than pref");
}
/*
* Accumulate percentage widths on column spanning cells into
* temporary variables.
*/
void AddSpanPrefPercent(float aSpanPrefPercent) {
if (aSpanPrefPercent > mSpanPrefPercent)
mSpanPrefPercent = aSpanPrefPercent;
}
/*
* Accumulate the temporary variables for column spanning cells into
* the primary variables.
*/
void AccumulateSpanIntrinsics() {
AddCoords(mSpanMinCoord, mSpanPrefCoord, mHasSpecifiedCoord);
AddPrefPercent(mSpanPrefPercent);
}
// Used to adjust a column's pref percent so that the table's total
// never exceeeds 100% (by only allowing percentages to be used,
// starting at the first column, until they reach 100%).
void AdjustPrefPercent(float *aTableTotalPercent) {
float allowed = 1.0f - *aTableTotalPercent;
if (mPrefPercent > allowed)
mPrefPercent = allowed;
*aTableTotalPercent += mPrefPercent;
}
// The final width of the column.
void ResetFinalWidth() {
mFinalWidth = nscoord_MIN; // so we detect that it changed
}
void SetFinalWidth(nscoord aFinalWidth) {
mFinalWidth = aFinalWidth;
}
nscoord GetFinalWidth() {
return mFinalWidth;
}
protected:
nsTableColFrame(nsStyleContext* aContext);
~nsTableColFrame();
nscoord mMinCoord;
nscoord mPrefCoord;
nscoord mSpanMinCoord; // XXX...
nscoord mSpanPrefCoord; // XXX...
float mPrefPercent;
float mSpanPrefPercent; // XXX...
// ...XXX the four members marked above could be allocated as part of
// a separate array allocated only during
// BasicTableLayoutStrategy::ComputeColumnIntrinsicWidths (and only
// when colspans were present).
nscoord mFinalWidth;
// the index of the column with respect to the whole tabble (starting at 0)
// it should never be smaller then the start column index of the parent
// colgroup
PRUint32 mColIndex: 16;
// border width in pixels of the inner half of the border only
BCPixelSize mLeftBorderWidth;
BCPixelSize mRightBorderWidth;
BCPixelSize mTopContBorderWidth;
BCPixelSize mRightContBorderWidth;
BCPixelSize mBottomContBorderWidth;
bool mHasSpecifiedCoord;
};
inline PRInt32 nsTableColFrame::GetColIndex() const
{
return mColIndex;
}
inline void nsTableColFrame::SetColIndex (PRInt32 aColIndex)
{
mColIndex = aColIndex;
}
inline nscoord nsTableColFrame::GetLeftBorderWidth()
{
return mLeftBorderWidth;
}
inline void nsTableColFrame::SetLeftBorderWidth(BCPixelSize aWidth)
{
mLeftBorderWidth = aWidth;
}
inline nscoord nsTableColFrame::GetRightBorderWidth()
{
return mRightBorderWidth;
}
inline void nsTableColFrame::SetRightBorderWidth(BCPixelSize aWidth)
{
mRightBorderWidth = aWidth;
}
inline nscoord
nsTableColFrame::GetContinuousBCBorderWidth(nsMargin& aBorder)
{
PRInt32 aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
aBorder.top = BC_BORDER_BOTTOM_HALF_COORD(aPixelsToTwips,
mTopContBorderWidth);
aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips,
mRightContBorderWidth);
aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips,
mBottomContBorderWidth);
return BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips, mRightContBorderWidth);
}
#endif