зеркало из https://github.com/mozilla/pjs.git
381 строка
12 KiB
C++
381 строка
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsTableColFrame_h__
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#define nsTableColFrame_h__
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#include "nscore.h"
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#include "nsContainerFrame.h"
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#include "nsTablePainter.h"
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class nsVoidArray;
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class nsTableCellFrame;
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enum nsTableColType {
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eColContent = 0, // there is real col content associated
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eColAnonymousCol = 1, // the result of a span on a col
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eColAnonymousColGroup = 2, // the result of a span on a col group
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eColAnonymousCell = 3 // the result of a cell alone
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};
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class nsTableColFrame : public nsFrame {
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public:
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enum {eWIDTH_SOURCE_NONE =0, // no cell has contributed to the width style
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eWIDTH_SOURCE_CELL =1, // a cell specified a width
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eWIDTH_SOURCE_CELL_WITH_SPAN=2 // a cell implicitly specified a width via colspan
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};
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nsTableColType GetColType() const;
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void SetColType(nsTableColType aType);
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/** instantiate a new instance of nsTableRowFrame.
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* @param aPresShell the pres shell for this frame
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*
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* @return the frame that was created
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*/
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friend nsIFrame* NS_NewTableColFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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PRInt32 GetColIndex() const;
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void SetColIndex (PRInt32 aColIndex);
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nsTableColFrame* GetNextCol() const;
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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/**
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* Table columns never paint anything, nor receive events.
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*/
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) { return NS_OK; }
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::tableColFrame
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*/
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virtual nsIAtom* GetType() const;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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/** return the number of the columns the col represents. always >= 0 */
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virtual PRInt32 GetSpan ();
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/** convenience method, calls into cellmap */
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nsVoidArray * GetCells();
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/** convenience method, calls into cellmap */
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PRInt32 Count() const;
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nscoord GetLeftBorderWidth();
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void SetLeftBorderWidth(BCPixelSize aWidth);
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nscoord GetRightBorderWidth();
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void SetRightBorderWidth(BCPixelSize aWidth);
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/**
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* Gets inner border widths before collapsing with cell borders
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* Caller must get left border from previous column or from table
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* GetContinuousBCBorderWidth will not overwrite aBorder.left
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* see nsTablePainter about continuous borders
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*
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* @return outer right border width (left inner for next column)
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*/
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nscoord GetContinuousBCBorderWidth(nsMargin& aBorder);
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/**
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* Set full border widths before collapsing with cell borders
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* @param aForSide - side to set; only valid for top, right, and bottom
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*/
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void SetContinuousBCBorderWidth(PRUint8 aForSide,
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BCPixelSize aPixelValue);
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#ifdef DEBUG
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void Dump(PRInt32 aIndent);
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#endif
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/**
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* Restore the default values of the intrinsic widths, so that we can
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* re-accumulate intrinsic widths from the cells in the column.
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*/
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void ResetIntrinsics() {
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mMinCoord = 0;
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mPrefCoord = 0;
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mPrefPercent = 0.0f;
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mHasSpecifiedCoord = PR_FALSE;
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}
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/**
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* Restore the default value of the preferred percentage width (the
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* only intrinsic width used by FixedTableLayoutStrategy.
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*/
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void ResetPrefPercent() {
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mPrefPercent = 0.0f;
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}
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/**
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* Restore the default values of the temporary buffer for
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* spanning-cell intrinsic widths (as we process spanning cells).
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*/
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void ResetSpanIntrinsics() {
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mSpanMinCoord = 0;
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mSpanPrefCoord = 0;
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mSpanPrefPercent = 0.0f;
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mSpanHasSpecifiedCoord = PR_FALSE;
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}
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/**
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* Add the widths for a cell or column element, or the contribution of
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* the widths from a column-spanning cell:
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* @param aMinCoord The minimum intrinsic width
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* @param aPrefCoord The preferred intrinsic width or, if there is a
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* specified non-percentage width, max(specified width, minimum intrinsic
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* width).
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* @param aHasSpecifiedCoord Whether there is a specified
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* non-percentage width.
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*
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* Note that the implementation of this functions is a bit tricky
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* since mPrefCoord means different things depending on
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* whether mHasSpecifiedCoord is true (and likewise for aPrefCoord and
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* aHasSpecifiedCoord). If mHasSpecifiedCoord is false, then
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* all widths added had aHasSpecifiedCoord false and mPrefCoord is the
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* largest of the pref widths. But if mHasSpecifiedCoord is true,
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* then mPrefCoord is the largest of (1) the pref widths for cells
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* with aHasSpecifiedCoord true and (2) the min widths for cells with
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* aHasSpecifiedCoord false.
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*/
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void AddCoords(nscoord aMinCoord, nscoord aPrefCoord,
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PRBool aHasSpecifiedCoord) {
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NS_ASSERTION(aMinCoord <= aPrefCoord, "intrinsic widths out of order");
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if (aHasSpecifiedCoord && !mHasSpecifiedCoord) {
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mPrefCoord = mMinCoord;
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mHasSpecifiedCoord = PR_TRUE;
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}
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if (!aHasSpecifiedCoord && mHasSpecifiedCoord) {
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aPrefCoord = aMinCoord; // NOTE: modifying argument
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}
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if (aMinCoord > mMinCoord)
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mMinCoord = aMinCoord;
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if (aPrefCoord > mPrefCoord)
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mPrefCoord = aPrefCoord;
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NS_ASSERTION(mMinCoord <= mPrefCoord, "min larger than pref");
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}
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/**
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* Add a percentage width specified on a cell or column element or the
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* contribution to this column of a percentage width specified on a
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* column-spanning cell.
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*/
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void AddPrefPercent(float aPrefPercent) {
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if (aPrefPercent > mPrefPercent)
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mPrefPercent = aPrefPercent;
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}
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/**
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* Get the largest minimum intrinsic width for this column.
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*/
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nscoord GetMinCoord() const { return mMinCoord; }
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/**
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* Get the largest preferred width for this column, or, if there were
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* any specified non-percentage widths (see GetHasSpecifiedCoord), the
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* largest minimum intrinsic width or specified width.
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*/
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nscoord GetPrefCoord() const { return mPrefCoord; }
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/**
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* Get whether there were any specified widths contributing to this
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* column.
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*/
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PRBool GetHasSpecifiedCoord() const { return mHasSpecifiedCoord; }
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/**
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* Get the largest specified percentage width contributing to this
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* column (returns 0 if there were none).
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*/
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float GetPrefPercent() const { return mPrefPercent; }
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/**
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* Like AddCoords, but into a temporary buffer used for groups of
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* column-spanning cells.
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*/
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void AddSpanCoords(nscoord aSpanMinCoord, nscoord aSpanPrefCoord,
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PRBool aSpanHasSpecifiedCoord) {
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NS_ASSERTION(aSpanMinCoord <= aSpanPrefCoord,
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"intrinsic widths out of order");
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if (aSpanHasSpecifiedCoord && !mSpanHasSpecifiedCoord) {
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mSpanPrefCoord = mSpanMinCoord;
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mSpanHasSpecifiedCoord = PR_TRUE;
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}
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if (!aSpanHasSpecifiedCoord && mSpanHasSpecifiedCoord) {
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aSpanPrefCoord = aSpanMinCoord; // NOTE: modifying argument
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}
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if (aSpanMinCoord > mSpanMinCoord)
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mSpanMinCoord = aSpanMinCoord;
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if (aSpanPrefCoord > mSpanPrefCoord)
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mSpanPrefCoord = aSpanPrefCoord;
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NS_ASSERTION(mSpanMinCoord <= mSpanPrefCoord, "min larger than pref");
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}
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/*
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* Accumulate percentage widths on column spanning cells into
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* temporary variables.
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*/
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void AddSpanPrefPercent(float aSpanPrefPercent) {
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if (aSpanPrefPercent > mSpanPrefPercent)
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mSpanPrefPercent = aSpanPrefPercent;
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}
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/*
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* Accumulate the temporary variables for column spanning cells into
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* the primary variables.
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*/
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void AccumulateSpanIntrinsics() {
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AddCoords(mSpanMinCoord, mSpanPrefCoord, mSpanHasSpecifiedCoord);
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AddPrefPercent(mSpanPrefPercent);
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}
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// Used to adjust a column's pref percent so that the table's total
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// never exceeeds 100% (by only allowing percentages to be used,
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// starting at the first column, until they reach 100%).
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void AdjustPrefPercent(float *aTableTotalPercent) {
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float allowed = 1.0f - *aTableTotalPercent;
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if (mPrefPercent > allowed)
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mPrefPercent = allowed;
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*aTableTotalPercent += mPrefPercent;
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}
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// The final width of the column.
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void ResetFinalWidth() {
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mFinalWidth = nscoord_MIN; // so we detect that it changed
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}
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void SetFinalWidth(nscoord aFinalWidth) {
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mFinalWidth = aFinalWidth;
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}
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nscoord GetFinalWidth() {
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return mFinalWidth;
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}
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protected:
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nsTableColFrame(nsStyleContext* aContext);
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~nsTableColFrame();
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// the index of the column with respect to the whole tabble (starting at 0)
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// it should never be smaller then the start column index of the parent
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// colgroup
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PRUint32 mColIndex: 16;
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// border width in pixels of the inner half of the border only
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BCPixelSize mLeftBorderWidth;
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BCPixelSize mRightBorderWidth;
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BCPixelSize mTopContBorderWidth;
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BCPixelSize mRightContBorderWidth;
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BCPixelSize mBottomContBorderWidth;
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PRPackedBool mHasSpecifiedCoord;
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PRPackedBool mSpanHasSpecifiedCoord; // XXX...
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nscoord mMinCoord;
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nscoord mPrefCoord;
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nscoord mSpanMinCoord; // XXX...
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nscoord mSpanPrefCoord; // XXX...
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float mPrefPercent;
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float mSpanPrefPercent; // XXX...
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// ...XXX the four members marked above could be allocated as part of
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// a separate array allocated only during
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// BasicTableLayoutStrategy::ComputeColumnIntrinsicWidths (and only
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// when colspans were present).
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nscoord mFinalWidth;
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};
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inline PRInt32 nsTableColFrame::GetColIndex() const
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{
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return mColIndex;
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}
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inline void nsTableColFrame::SetColIndex (PRInt32 aColIndex)
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{
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mColIndex = aColIndex;
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}
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inline nscoord nsTableColFrame::GetLeftBorderWidth()
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{
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return mLeftBorderWidth;
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}
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inline void nsTableColFrame::SetLeftBorderWidth(BCPixelSize aWidth)
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{
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mLeftBorderWidth = aWidth;
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}
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inline nscoord nsTableColFrame::GetRightBorderWidth()
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{
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return mRightBorderWidth;
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}
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inline void nsTableColFrame::SetRightBorderWidth(BCPixelSize aWidth)
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{
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mRightBorderWidth = aWidth;
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}
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inline nscoord
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nsTableColFrame::GetContinuousBCBorderWidth(nsMargin& aBorder)
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{
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PRInt32 aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
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aBorder.top = BC_BORDER_BOTTOM_HALF_COORD(aPixelsToTwips,
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mTopContBorderWidth);
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aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips,
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mRightContBorderWidth);
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aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips,
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mBottomContBorderWidth);
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return BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips, mRightContBorderWidth);
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}
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#endif
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