LCOV - code coverage report
Current view: directory - layout/xul/base/src/grid - nsGridRowLayout.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 80 0 0.0 %
Date: 2012-06-02 Functions: 11 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla Communicator client code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : //
      39                 : // Eric Vaughan
      40                 : // Netscape Communications
      41                 : //
      42                 : // See documentation in associated header file
      43                 : //
      44                 : 
      45                 : #include "nsGridRowLayout.h"
      46                 : #include "nsBoxLayoutState.h"
      47                 : #include "nsIScrollableFrame.h"
      48                 : #include "nsBox.h"
      49                 : #include "nsStackLayout.h"
      50                 : #include "nsGrid.h"
      51                 : 
      52               0 : nsGridRowLayout::nsGridRowLayout():nsSprocketLayout()
      53                 : {
      54               0 : }
      55                 : 
      56                 : void
      57               0 : nsGridRowLayout::ChildrenInserted(nsIBox* aBox, nsBoxLayoutState& aState,
      58                 :                                   nsIBox* aPrevBox,
      59                 :                                   const nsFrameList::Slice& aNewChildren)
      60                 : {
      61               0 :   ChildAddedOrRemoved(aBox, aState);
      62               0 : }
      63                 : 
      64                 : void
      65               0 : nsGridRowLayout::ChildrenAppended(nsIBox* aBox, nsBoxLayoutState& aState,
      66                 :                                   const nsFrameList::Slice& aNewChildren)
      67                 : {
      68               0 :   ChildAddedOrRemoved(aBox, aState);
      69               0 : }
      70                 : 
      71                 : void
      72               0 : nsGridRowLayout::ChildrenRemoved(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)
      73                 : {
      74               0 :   ChildAddedOrRemoved(aBox, aState);
      75               0 : }
      76                 : 
      77                 : void
      78               0 : nsGridRowLayout::ChildrenSet(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)
      79                 : {
      80               0 :   ChildAddedOrRemoved(aBox, aState);
      81               0 : }
      82                 : 
      83                 : nsIGridPart*
      84               0 : nsGridRowLayout::GetParentGridPart(nsIBox* aBox, nsIBox** aParentBox)
      85                 : {
      86                 :   // go up and find our parent gridRow. Skip and non gridRow
      87                 :   // parents.
      88               0 :   *aParentBox = nsnull;
      89                 :   
      90                 :   // walk up through any scrollboxes
      91               0 :   aBox = nsGrid::GetScrollBox(aBox);
      92                 : 
      93                 :   // get the parent
      94               0 :   if (aBox)
      95               0 :     aBox = aBox->GetParentBox();
      96                 : 
      97               0 :   if (aBox)
      98                 :   {
      99               0 :     nsIGridPart* parentGridRow = nsGrid::GetPartFromBox(aBox);
     100               0 :     if (parentGridRow && parentGridRow->CanContain(this)) {
     101               0 :       *aParentBox = aBox;
     102               0 :       return parentGridRow;
     103                 :     }
     104                 :   }
     105                 : 
     106               0 :   return nsnull;
     107                 : }
     108                 : 
     109                 : 
     110                 : nsGrid*
     111               0 : nsGridRowLayout::GetGrid(nsIBox* aBox, PRInt32* aIndex, nsGridRowLayout* aRequestor)
     112                 : {
     113                 : 
     114               0 :    if (aRequestor == nsnull)
     115                 :    {
     116                 :       nsIBox* parentBox; // nsIBox is implemented by nsIFrame and is not refcounted.
     117               0 :       nsIGridPart* parent = GetParentGridPart(aBox, &parentBox);
     118               0 :       if (parent)
     119               0 :          return parent->GetGrid(parentBox, aIndex, this);
     120               0 :       return nsnull;
     121                 :    }
     122                 : 
     123               0 :    PRInt32 index = -1;
     124               0 :    nsIBox* child = aBox->GetChildBox();
     125               0 :    PRInt32 count = 0;
     126               0 :    while(child)
     127                 :    {
     128                 :      // if there is a scrollframe walk inside it to its child
     129               0 :      nsIBox* childBox = nsGrid::GetScrolledBox(child);
     130                 : 
     131               0 :      nsBoxLayout* layout = childBox->GetLayoutManager();
     132               0 :      nsIGridPart* gridRow = nsGrid::GetPartFromBox(childBox);
     133               0 :      if (gridRow) 
     134                 :      {
     135               0 :        if (layout == aRequestor) {
     136               0 :           index = count;
     137               0 :           break;
     138                 :        }
     139               0 :        count += gridRow->GetRowCount();
     140                 :      } else 
     141               0 :        count++;
     142                 : 
     143               0 :      child = child->GetNextBox();
     144                 :    }
     145                 : 
     146                 :    // if we didn't find ourselves then the tree isn't properly formed yet
     147                 :    // this could happen during initial construction so lets just
     148                 :    // fail.
     149               0 :    if (index == -1) {
     150               0 :      *aIndex = -1;
     151               0 :      return nsnull;
     152                 :    }
     153                 : 
     154               0 :    (*aIndex) += index;
     155                 : 
     156                 :    nsIBox* parentBox; // nsIBox is implemented by nsIFrame and is not refcounted.
     157               0 :    nsIGridPart* parent = GetParentGridPart(aBox, &parentBox);
     158               0 :    if (parent)
     159               0 :      return parent->GetGrid(parentBox, aIndex, this);
     160                 : 
     161               0 :    return nsnull;
     162                 : }
     163                 : 
     164                 : nsMargin
     165               0 : nsGridRowLayout::GetTotalMargin(nsIBox* aBox, bool aIsHorizontal)
     166                 : {
     167                 :   // get our parents margin
     168               0 :   nsMargin margin(0,0,0,0);
     169               0 :   nsIBox* parent = nsnull;
     170               0 :   nsIGridPart* part = GetParentGridPart(aBox, &parent);
     171               0 :   if (part && parent) {
     172                 :     // if we are the first or last child walk upward and add margins.
     173                 : 
     174                 :     // make sure we check for a scrollbox
     175               0 :     aBox = nsGrid::GetScrollBox(aBox);
     176                 : 
     177                 :     // see if we have a next to see if we are last
     178               0 :     nsIBox* next = aBox->GetNextBox();
     179                 : 
     180                 :     // get the parent first child to see if we are first
     181               0 :     nsIBox* child = parent->GetChildBox();
     182                 : 
     183               0 :     margin = part->GetTotalMargin(parent, aIsHorizontal);
     184                 : 
     185                 :     // if first or last
     186               0 :     if (child == aBox || next == nsnull) {
     187                 : 
     188                 :        // if it's not the first child remove the top margin
     189                 :        // we don't need it.
     190               0 :        if (child != aBox)
     191                 :        {
     192               0 :           if (aIsHorizontal)
     193               0 :               margin.top = 0;
     194                 :           else 
     195               0 :               margin.left = 0;
     196                 :        }
     197                 : 
     198                 :        // if it's not the last child remove the bottom margin
     199                 :        // we don't need it.
     200               0 :        if (next != nsnull)
     201                 :        {
     202               0 :           if (aIsHorizontal)
     203               0 :               margin.bottom = 0;
     204                 :           else 
     205               0 :               margin.right = 0;
     206                 :        }
     207                 : 
     208                 :     }
     209                 :   }
     210                 :     
     211                 :   // add ours to it.
     212               0 :   nsMargin ourMargin;
     213               0 :   aBox->GetMargin(ourMargin);
     214               0 :   margin += ourMargin;
     215                 : 
     216                 :   return margin;
     217                 : }
     218                 : 
     219               0 : NS_IMPL_ADDREF_INHERITED(nsGridRowLayout, nsBoxLayout)
     220               0 : NS_IMPL_RELEASE_INHERITED(nsGridRowLayout, nsBoxLayout)
     221                 : 
     222               0 : NS_INTERFACE_MAP_BEGIN(nsGridRowLayout)
     223               0 :   NS_INTERFACE_MAP_ENTRY(nsIGridPart)
     224               0 :   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIGridPart)
     225               0 : NS_INTERFACE_MAP_END_INHERITING(nsBoxLayout)

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