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lightning-sunbird  0.9+nobinonly
nsGridRowLeafFrame.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 //
00039 // Eric Vaughan
00040 // Netscape Communications
00041 //
00042 // See documentation in associated header file
00043 //
00044 
00045 #include "nsGridRowLeafFrame.h"
00046 #include "nsGridRowLeafLayout.h"
00047 #include "nsGridRow.h"
00048 #include "nsBoxLayoutState.h"
00049 #include "nsGridLayout2.h"
00050 
00051 nsresult
00052 NS_NewGridRowLeafFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRBool aIsRoot, nsIBoxLayout* aLayoutManager)
00053 {
00054     NS_PRECONDITION(aNewFrame, "null OUT ptr");
00055     if (nsnull == aNewFrame) {
00056         return NS_ERROR_NULL_POINTER;
00057     }
00058     nsGridRowLeafFrame* it = new (aPresShell) nsGridRowLeafFrame (aPresShell, aIsRoot, aLayoutManager);
00059     if (nsnull == it)
00060         return NS_ERROR_OUT_OF_MEMORY;
00061 
00062     *aNewFrame = it;
00063     return NS_OK;
00064 
00065 } 
00066 
00067 nsGridRowLeafFrame::nsGridRowLeafFrame(nsIPresShell* aPresShell, PRBool aIsRoot, nsIBoxLayout* aLayoutManager)
00068 :nsBoxFrame(aPresShell, aIsRoot, aLayoutManager)
00069 {
00070 
00071 }
00072 
00073 /*
00074  * Our border and padding could be affected by our columns or rows.
00075  * Let's go check it out.
00076  */
00077 NS_IMETHODIMP
00078 nsGridRowLeafFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)
00079 {
00080   // if our columns have made our padding larger add it in.
00081   nsresult rv = nsBoxFrame::GetBorderAndPadding(aBorderAndPadding);
00082 
00083   nsCOMPtr<nsIBoxLayout> layout;
00084   GetLayoutManager(getter_AddRefs(layout));
00085   if (!layout)
00086     return rv;
00087 
00088   nsCOMPtr<nsIGridPart> part = do_QueryInterface(layout);
00089   if (!part)
00090     return rv;
00091     
00092   nsGrid* grid = nsnull;
00093   PRInt32 index = 0;
00094   part->GetGrid(this, &grid, &index);
00095 
00096   if (!grid) 
00097     return rv;
00098 
00099   PRInt32 isHorizontal = IsHorizontal();
00100 
00101   nsBoxLayoutState state((nsPresContext*) GetPresContext());
00102 
00103   PRInt32 firstIndex = 0;
00104   PRInt32 lastIndex = 0;
00105   nsGridRow* firstRow = nsnull;
00106   nsGridRow* lastRow = nsnull;
00107   grid->GetFirstAndLastRow(state, firstIndex, lastIndex, firstRow, lastRow, isHorizontal);
00108 
00109   // only the first and last rows can be affected.
00110   if (firstRow && firstRow->GetBox() == this) {
00111     
00112     nscoord top = 0;
00113     nscoord bottom = 0;
00114     grid->GetRowOffsets(state, firstIndex, top, bottom, isHorizontal);
00115 
00116     if (isHorizontal) {
00117       if (top > aBorderAndPadding.top)
00118         aBorderAndPadding.top = top;
00119     } else {
00120       if (top > aBorderAndPadding.left)
00121         aBorderAndPadding.left = top;
00122     } 
00123   }
00124 
00125   if (lastRow && lastRow->GetBox() == this) {
00126     
00127     nscoord top = 0;
00128     nscoord bottom = 0;
00129     grid->GetRowOffsets(state, lastIndex, top, bottom, isHorizontal);
00130 
00131     if (isHorizontal) {
00132       if (bottom > aBorderAndPadding.bottom)
00133         aBorderAndPadding.bottom = bottom;
00134     } else {
00135       if (bottom > aBorderAndPadding.right)
00136         aBorderAndPadding.right = bottom;
00137     }
00138     
00139   }  
00140   
00141   return rv;
00142 }
00143 
00144