LCOV - code coverage report
Current view: directory - layout/forms - nsFieldSetFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 240 0 0.0 %
Date: 2012-06-02 Functions: 31 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.org 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                 : // YY need to pass isMultiple before create called
      39                 : 
      40                 : //#include "nsFormControlFrame.h"
      41                 : #include "nsContainerFrame.h"
      42                 : #include "nsLegendFrame.h"
      43                 : #include "nsIDOMNode.h"
      44                 : #include "nsIDOMHTMLFieldSetElement.h"
      45                 : #include "nsIDOMHTMLLegendElement.h"
      46                 : #include "nsCSSRendering.h"
      47                 : //#include "nsIDOMHTMLCollection.h"
      48                 : #include "nsIContent.h"
      49                 : #include "nsIFrame.h"
      50                 : #include "nsISupports.h"
      51                 : #include "nsIAtom.h"
      52                 : #include "nsPresContext.h"
      53                 : #include "nsFrameManager.h"
      54                 : #include "nsHTMLParts.h"
      55                 : #include "nsGkAtoms.h"
      56                 : #include "nsStyleConsts.h"
      57                 : #include "nsFont.h"
      58                 : #include "nsCOMPtr.h"
      59                 : #ifdef ACCESSIBILITY
      60                 : #include "nsAccessibilityService.h"
      61                 : #endif
      62                 : #include "nsIServiceManager.h"
      63                 : #include "nsDisplayList.h"
      64                 : #include "nsRenderingContext.h"
      65                 : 
      66                 : using namespace mozilla;
      67                 : using namespace mozilla::layout;
      68                 : 
      69                 : class nsLegendFrame;
      70                 : 
      71               0 : class nsFieldSetFrame : public nsContainerFrame {
      72                 : public:
      73                 :   NS_DECL_FRAMEARENA_HELPERS
      74                 : 
      75                 :   nsFieldSetFrame(nsStyleContext* aContext);
      76                 : 
      77                 :   NS_IMETHOD SetInitialChildList(ChildListID    aListID,
      78                 :                                  nsFrameList&   aChildList);
      79                 : 
      80                 :   NS_HIDDEN_(nscoord)
      81                 :     GetIntrinsicWidth(nsRenderingContext* aRenderingContext,
      82                 :                       nsLayoutUtils::IntrinsicWidthType);
      83                 :   virtual nscoord GetMinWidth(nsRenderingContext* aRenderingContext);
      84                 :   virtual nscoord GetPrefWidth(nsRenderingContext* aRenderingContext);
      85                 :   virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
      86                 :                              nsSize aCBSize, nscoord aAvailableWidth,
      87                 :                              nsSize aMargin, nsSize aBorder, nsSize aPadding,
      88                 :                              bool aShrinkWrap);
      89                 :   virtual nscoord GetBaseline() const;
      90                 :   virtual void DestroyFrom(nsIFrame* aDestructRoot);
      91                 : 
      92                 :   NS_IMETHOD Reflow(nsPresContext*           aPresContext,
      93                 :                     nsHTMLReflowMetrics&     aDesiredSize,
      94                 :                     const nsHTMLReflowState& aReflowState,
      95                 :                     nsReflowStatus&          aStatus);
      96                 :                                
      97                 :   NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
      98                 :                               const nsRect&           aDirtyRect,
      99                 :                               const nsDisplayListSet& aLists);
     100                 : 
     101                 :   void PaintBorderBackground(nsRenderingContext& aRenderingContext,
     102                 :     nsPoint aPt, const nsRect& aDirtyRect, PRUint32 aBGFlags);
     103                 : 
     104                 :   NS_IMETHOD AppendFrames(ChildListID    aListID,
     105                 :                           nsFrameList&   aFrameList);
     106                 :   NS_IMETHOD InsertFrames(ChildListID    aListID,
     107                 :                           nsIFrame*      aPrevFrame,
     108                 :                           nsFrameList&   aFrameList);
     109                 :   NS_IMETHOD RemoveFrame(ChildListID    aListID,
     110                 :                          nsIFrame*      aOldFrame);
     111                 : 
     112                 :   virtual nsIAtom* GetType() const;
     113                 : 
     114                 : #ifdef ACCESSIBILITY  
     115                 :   virtual already_AddRefed<nsAccessible> CreateAccessible();
     116                 : #endif
     117                 : 
     118                 : #ifdef DEBUG
     119               0 :   NS_IMETHOD GetFrameName(nsAString& aResult) const {
     120               0 :     return MakeFrameName(NS_LITERAL_STRING("FieldSet"), aResult);
     121                 :   }
     122                 : #endif
     123                 : 
     124                 : protected:
     125                 : 
     126                 :   virtual PRIntn GetSkipSides() const;
     127                 :   void ReparentFrameList(const nsFrameList& aFrameList);
     128                 : 
     129                 :   nsIFrame* mLegendFrame;
     130                 :   nsIFrame* mContentFrame;
     131                 :   nsRect    mLegendRect;
     132                 :   nscoord   mLegendSpace;
     133                 : };
     134                 : 
     135                 : nsIFrame*
     136               0 : NS_NewFieldSetFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
     137                 : {
     138               0 :   return new (aPresShell) nsFieldSetFrame(aContext);
     139                 : }
     140                 : 
     141               0 : NS_IMPL_FRAMEARENA_HELPERS(nsFieldSetFrame)
     142                 : 
     143               0 : nsFieldSetFrame::nsFieldSetFrame(nsStyleContext* aContext)
     144               0 :   : nsContainerFrame(aContext)
     145                 : {
     146               0 :   mContentFrame = nsnull;
     147               0 :   mLegendFrame  = nsnull;
     148               0 :   mLegendSpace  = 0;
     149               0 : }
     150                 : 
     151                 : void
     152               0 : nsFieldSetFrame::DestroyFrom(nsIFrame* aDestructRoot)
     153                 : {
     154               0 :   DestroyAbsoluteFrames(aDestructRoot);
     155               0 :   nsContainerFrame::DestroyFrom(aDestructRoot);
     156               0 : }
     157                 : 
     158                 : nsIAtom*
     159               0 : nsFieldSetFrame::GetType() const
     160                 : {
     161               0 :   return nsGkAtoms::fieldSetFrame;
     162                 : }
     163                 : 
     164                 : NS_IMETHODIMP
     165               0 : nsFieldSetFrame::SetInitialChildList(ChildListID    aListID,
     166                 :                                      nsFrameList&   aChildList)
     167                 : {
     168                 :   // Get the content and legend frames.
     169               0 :   if (!aChildList.OnlyChild()) {
     170               0 :     NS_ASSERTION(aChildList.GetLength() == 2, "Unexpected child list");
     171               0 :     mContentFrame = aChildList.LastChild();
     172               0 :     mLegendFrame  = aChildList.FirstChild();
     173                 :   } else {
     174               0 :     mContentFrame = aChildList.FirstChild();
     175               0 :     mLegendFrame  = nsnull;
     176                 :   }
     177                 : 
     178                 :   // Queue up the frames for the content frame
     179               0 :   return nsContainerFrame::SetInitialChildList(kPrincipalList, aChildList);
     180                 : }
     181                 : 
     182                 : class nsDisplayFieldSetBorderBackground : public nsDisplayItem {
     183                 : public:
     184               0 :   nsDisplayFieldSetBorderBackground(nsDisplayListBuilder* aBuilder,
     185                 :                                     nsFieldSetFrame* aFrame)
     186               0 :     : nsDisplayItem(aBuilder, aFrame) {
     187               0 :     MOZ_COUNT_CTOR(nsDisplayFieldSetBorderBackground);
     188               0 :   }
     189                 : #ifdef NS_BUILD_REFCNT_LOGGING
     190               0 :   virtual ~nsDisplayFieldSetBorderBackground() {
     191               0 :     MOZ_COUNT_DTOR(nsDisplayFieldSetBorderBackground);
     192               0 :   }
     193                 : #endif
     194                 : 
     195                 :   virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
     196                 :                        HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames);
     197                 :   virtual void Paint(nsDisplayListBuilder* aBuilder,
     198                 :                      nsRenderingContext* aCtx);
     199               0 :   NS_DISPLAY_DECL_NAME("FieldSetBorderBackground", TYPE_FIELDSET_BORDER_BACKGROUND)
     200                 : };
     201                 : 
     202               0 : void nsDisplayFieldSetBorderBackground::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
     203                 :                                                 HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
     204                 : {
     205                 :   // aPt is guaranteed to be in this item's bounds. We do the hit test based on the
     206                 :   // frame bounds even though our background doesn't cover the whole frame.
     207                 :   // It's not clear whether this is correct.
     208               0 :   aOutFrames->AppendElement(mFrame);
     209               0 : }
     210                 : 
     211                 : void
     212               0 : nsDisplayFieldSetBorderBackground::Paint(nsDisplayListBuilder* aBuilder,
     213                 :                                          nsRenderingContext* aCtx)
     214                 : {
     215                 :   static_cast<nsFieldSetFrame*>(mFrame)->
     216               0 :     PaintBorderBackground(*aCtx, ToReferenceFrame(),
     217               0 :                           mVisibleRect, aBuilder->GetBackgroundPaintFlags());
     218               0 : }
     219                 : 
     220                 : NS_IMETHODIMP
     221               0 : nsFieldSetFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     222                 :                                   const nsRect&           aDirtyRect,
     223                 :                                   const nsDisplayListSet& aLists) {
     224                 :   // Paint our background and border in a special way.
     225                 :   // REVIEW: We don't really need to check frame emptiness here; if it's empty,
     226                 :   // the background/border display item won't do anything, and if it isn't empty,
     227                 :   // we need to paint the outline
     228               0 :   if (IsVisibleForPainting(aBuilder)) {
     229               0 :     if (GetStyleBorder()->mBoxShadow) {
     230                 :       nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
     231               0 :           nsDisplayBoxShadowOuter(aBuilder, this));
     232               0 :       NS_ENSURE_SUCCESS(rv, rv);
     233                 :     }
     234                 : 
     235                 :     // don't bother checking to see if we really have a border or background.
     236                 :     // we usually will have a border.
     237                 :     nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
     238               0 :         nsDisplayFieldSetBorderBackground(aBuilder, this));
     239               0 :     NS_ENSURE_SUCCESS(rv, rv);
     240                 :   
     241               0 :     rv = DisplayOutlineUnconditional(aBuilder, aLists);
     242               0 :     NS_ENSURE_SUCCESS(rv, rv);
     243                 : 
     244               0 :     DO_GLOBAL_REFLOW_COUNT_DSP("nsFieldSetFrame");
     245                 :   }
     246                 : 
     247               0 :   nsDisplayListCollection contentDisplayItems;
     248               0 :   if (mContentFrame) {
     249                 :     // Collect mContentFrame's display items into their own collection. We need
     250                 :     // to be calling BuildDisplayList on mContentFrame before mLegendFrame in
     251                 :     // case it contains out-of-flow frames whose placeholders are under
     252                 :     // mLegendFrame. However, we want mContentFrame's display items to be
     253                 :     // after mLegendFrame's display items in z-order, so we need to save them
     254                 :     // and append them later.
     255                 :     nsresult rv = BuildDisplayListForChild(aBuilder, mContentFrame, aDirtyRect,
     256               0 :                                            contentDisplayItems);
     257               0 :     NS_ENSURE_SUCCESS(rv, rv);
     258                 :   }
     259               0 :   if (mLegendFrame) {
     260                 :     // The legend's background goes on our BlockBorderBackgrounds list because
     261                 :     // it's a block child.
     262               0 :     nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
     263               0 :     nsresult rv = BuildDisplayListForChild(aBuilder, mLegendFrame, aDirtyRect, set);
     264               0 :     NS_ENSURE_SUCCESS(rv, rv);
     265                 :   }
     266                 :   // Put mContentFrame's display items on the master list. Note that
     267                 :   // this moves mContentFrame's border/background display items to our
     268                 :   // BorderBackground() list, which isn't really correct, but it's OK because
     269                 :   // mContentFrame is anonymous and can't have its own border and background.
     270               0 :   contentDisplayItems.MoveTo(aLists);
     271               0 :   return NS_OK;
     272                 : }
     273                 : 
     274                 : void
     275               0 : nsFieldSetFrame::PaintBorderBackground(nsRenderingContext& aRenderingContext,
     276                 :     nsPoint aPt, const nsRect& aDirtyRect, PRUint32 aBGFlags)
     277                 : {
     278               0 :   PRIntn skipSides = GetSkipSides();
     279               0 :   const nsStyleBorder* borderStyle = GetStyleBorder();
     280                 :        
     281               0 :   nscoord topBorder = borderStyle->GetActualBorderWidth(NS_SIDE_TOP);
     282               0 :   nscoord yoff = 0;
     283               0 :   nsPresContext* presContext = PresContext();
     284                 :      
     285                 :   // if the border is smaller than the legend. Move the border down
     286                 :   // to be centered on the legend. 
     287                 :   // FIXME: This means border-radius clamping is incorrect; we should
     288                 :   // override nsIFrame::GetBorderRadii.
     289               0 :   if (topBorder < mLegendRect.height)
     290               0 :     yoff = (mLegendRect.height - topBorder)/2;
     291                 :       
     292               0 :   nsRect rect(aPt.x, aPt.y + yoff, mRect.width, mRect.height - yoff);
     293                 : 
     294                 :   nsCSSRendering::PaintBackground(presContext, aRenderingContext, this,
     295               0 :                                   aDirtyRect, rect, aBGFlags);
     296                 : 
     297                 :   nsCSSRendering::PaintBoxShadowInner(presContext, aRenderingContext,
     298               0 :                                       this, rect, aDirtyRect);
     299                 : 
     300               0 :    if (mLegendFrame) {
     301                 : 
     302                 :     // Use the rect of the legend frame, not mLegendRect, so we draw our
     303                 :     // border under the legend's left and right margins.
     304               0 :     nsRect legendRect = mLegendFrame->GetRect() + aPt;
     305                 :     
     306                 :     // we should probably use PaintBorderEdges to do this but for now just use clipping
     307                 :     // to achieve the same effect.
     308                 : 
     309                 :     // draw left side
     310               0 :     nsRect clipRect(rect);
     311               0 :     clipRect.width = legendRect.x - rect.x;
     312               0 :     clipRect.height = topBorder;
     313                 : 
     314               0 :     aRenderingContext.PushState();
     315               0 :     aRenderingContext.IntersectClip(clipRect);
     316                 :     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
     317               0 :                                 aDirtyRect, rect, mStyleContext, skipSides);
     318                 : 
     319               0 :     aRenderingContext.PopState();
     320                 : 
     321                 : 
     322                 :     // draw right side
     323               0 :     clipRect = rect;
     324               0 :     clipRect.x = legendRect.XMost();
     325               0 :     clipRect.width = rect.XMost() - legendRect.XMost();
     326               0 :     clipRect.height = topBorder;
     327                 : 
     328               0 :     aRenderingContext.PushState();
     329               0 :     aRenderingContext.IntersectClip(clipRect);
     330                 :     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
     331               0 :                                 aDirtyRect, rect, mStyleContext, skipSides);
     332                 : 
     333               0 :     aRenderingContext.PopState();
     334                 : 
     335                 :     
     336                 :     // draw bottom
     337               0 :     clipRect = rect;
     338               0 :     clipRect.y += topBorder;
     339               0 :     clipRect.height = mRect.height - (yoff + topBorder);
     340                 :     
     341               0 :     aRenderingContext.PushState();
     342               0 :     aRenderingContext.IntersectClip(clipRect);
     343                 :     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
     344               0 :                                 aDirtyRect, rect, mStyleContext, skipSides);
     345                 : 
     346               0 :     aRenderingContext.PopState();
     347                 :   } else {
     348                 : 
     349                 :     nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
     350                 :                                 aDirtyRect,
     351               0 :                                 nsRect(aPt, mRect.Size()),
     352               0 :                                 mStyleContext, skipSides);
     353                 :   }
     354               0 : }
     355                 : 
     356                 : nscoord
     357               0 : nsFieldSetFrame::GetIntrinsicWidth(nsRenderingContext* aRenderingContext,
     358                 :                                    nsLayoutUtils::IntrinsicWidthType aType)
     359                 : {
     360               0 :   nscoord legendWidth = 0;
     361               0 :   nscoord contentWidth = 0;
     362               0 :   if (mLegendFrame) {
     363                 :     legendWidth =
     364                 :       nsLayoutUtils::IntrinsicForContainer(aRenderingContext, mLegendFrame,
     365               0 :                                            aType);
     366                 :   }
     367                 : 
     368               0 :   if (mContentFrame) {
     369                 :     contentWidth =
     370                 :       nsLayoutUtils::IntrinsicForContainer(aRenderingContext, mContentFrame,
     371               0 :                                            aType);
     372                 :   }
     373                 :       
     374               0 :   return NS_MAX(legendWidth, contentWidth);
     375                 : }
     376                 : 
     377                 : 
     378                 : nscoord
     379               0 : nsFieldSetFrame::GetMinWidth(nsRenderingContext* aRenderingContext)
     380                 : {
     381               0 :   nscoord result = 0;
     382               0 :   DISPLAY_MIN_WIDTH(this, result);
     383                 : 
     384               0 :   result = GetIntrinsicWidth(aRenderingContext, nsLayoutUtils::MIN_WIDTH);
     385               0 :   return result;
     386                 : }
     387                 : 
     388                 : nscoord
     389               0 : nsFieldSetFrame::GetPrefWidth(nsRenderingContext* aRenderingContext)
     390                 : {
     391               0 :   nscoord result = 0;
     392               0 :   DISPLAY_PREF_WIDTH(this, result);
     393                 : 
     394               0 :   result = GetIntrinsicWidth(aRenderingContext, nsLayoutUtils::PREF_WIDTH);
     395               0 :   return result;
     396                 : }
     397                 : 
     398                 : /* virtual */ nsSize
     399               0 : nsFieldSetFrame::ComputeSize(nsRenderingContext *aRenderingContext,
     400                 :                              nsSize aCBSize, nscoord aAvailableWidth,
     401                 :                              nsSize aMargin, nsSize aBorder, nsSize aPadding,
     402                 :                              bool aShrinkWrap)
     403                 : {
     404                 :   nsSize result =
     405                 :     nsContainerFrame::ComputeSize(aRenderingContext, aCBSize, aAvailableWidth,
     406               0 :                                   aMargin, aBorder, aPadding, aShrinkWrap);
     407                 : 
     408                 :   // Fieldsets never shrink below their min width.
     409                 : 
     410                 :   // If we're a container for font size inflation, then shrink
     411                 :   // wrapping inside of us should not apply font size inflation.
     412               0 :   AutoMaybeNullInflationContainer an(this);
     413                 : 
     414               0 :   nscoord minWidth = GetMinWidth(aRenderingContext);
     415               0 :   if (minWidth > result.width)
     416               0 :     result.width = minWidth;
     417                 : 
     418                 :   return result;
     419                 : }
     420                 : 
     421                 : NS_IMETHODIMP 
     422               0 : nsFieldSetFrame::Reflow(nsPresContext*           aPresContext,
     423                 :                         nsHTMLReflowMetrics&     aDesiredSize,
     424                 :                         const nsHTMLReflowState& aReflowState,
     425                 :                         nsReflowStatus&          aStatus)
     426                 : {
     427               0 :   DO_GLOBAL_REFLOW_COUNT("nsFieldSetFrame");
     428               0 :   DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
     429                 : 
     430               0 :   NS_PRECONDITION(aReflowState.ComputedWidth() != NS_INTRINSICSIZE,
     431                 :                   "Should have a precomputed width!");      
     432                 :   
     433                 :   // Initialize OUT parameter
     434               0 :   aStatus = NS_FRAME_COMPLETE;
     435                 : 
     436                 :   //------------ Handle Incremental Reflow -----------------
     437                 :   bool reflowContent;
     438                 :   bool reflowLegend;
     439                 : 
     440               0 :   if (aReflowState.ShouldReflowAllKids()) {
     441               0 :     reflowContent = mContentFrame != nsnull;
     442               0 :     reflowLegend = mLegendFrame != nsnull;
     443                 :   } else {
     444               0 :     reflowContent = mContentFrame && NS_SUBTREE_DIRTY(mContentFrame);
     445               0 :     reflowLegend = mLegendFrame && NS_SUBTREE_DIRTY(mLegendFrame);
     446                 :   }
     447                 : 
     448                 :   // We don't allow fieldsets to break vertically. If we did, we'd
     449                 :   // need logic here to push and pull overflow frames.
     450               0 :   nsSize availSize(aReflowState.ComputedWidth(), NS_UNCONSTRAINEDSIZE);
     451               0 :   NS_ASSERTION(!mContentFrame ||
     452                 :       nsLayoutUtils::IntrinsicForContainer(aReflowState.rendContext,
     453                 :                                            mContentFrame,
     454                 :                                            nsLayoutUtils::MIN_WIDTH) <=
     455                 :                availSize.width,
     456                 :                "Bogus availSize.width; should be bigger");
     457               0 :   NS_ASSERTION(!mLegendFrame ||
     458                 :       nsLayoutUtils::IntrinsicForContainer(aReflowState.rendContext,
     459                 :                                            mLegendFrame,
     460                 :                                            nsLayoutUtils::MIN_WIDTH) <=
     461                 :                availSize.width,
     462                 :                "Bogus availSize.width; should be bigger");
     463                 : 
     464                 :   // get our border and padding
     465               0 :   const nsMargin &borderPadding = aReflowState.mComputedBorderPadding;
     466               0 :   nsMargin border = borderPadding - aReflowState.mComputedPadding;  
     467                 : 
     468                 :   // Figure out how big the legend is if there is one. 
     469                 :   // get the legend's margin
     470               0 :   nsMargin legendMargin(0,0,0,0);
     471                 :   // reflow the legend only if needed
     472               0 :   if (reflowLegend) {
     473                 :     nsHTMLReflowState legendReflowState(aPresContext, aReflowState,
     474               0 :                                         mLegendFrame, availSize);
     475                 : 
     476               0 :     nsHTMLReflowMetrics legendDesiredSize;
     477                 : 
     478                 :     ReflowChild(mLegendFrame, aPresContext, legendDesiredSize, legendReflowState,
     479               0 :                 0, 0, NS_FRAME_NO_MOVE_FRAME, aStatus);
     480                 : #ifdef NOISY_REFLOW
     481                 :     printf("  returned (%d, %d)\n", legendDesiredSize.width, legendDesiredSize.height);
     482                 : #endif
     483                 :     // figure out the legend's rectangle
     484               0 :     legendMargin = mLegendFrame->GetUsedMargin();
     485               0 :     mLegendRect.width  = legendDesiredSize.width + legendMargin.left + legendMargin.right;
     486               0 :     mLegendRect.height = legendDesiredSize.height + legendMargin.top + legendMargin.bottom;
     487               0 :     mLegendRect.x = borderPadding.left;
     488               0 :     mLegendRect.y = 0;
     489                 : 
     490               0 :     nscoord oldSpace = mLegendSpace;
     491               0 :     mLegendSpace = 0;
     492               0 :     if (mLegendRect.height > border.top) {
     493                 :       // center the border on the legend
     494               0 :       mLegendSpace = mLegendRect.height - border.top;
     495                 :     } else {
     496               0 :       mLegendRect.y = (border.top - mLegendRect.height)/2;
     497                 :     }
     498                 : 
     499                 :     // if the legend space changes then we need to reflow the 
     500                 :     // content area as well.
     501               0 :     if (mLegendSpace != oldSpace && mContentFrame) {
     502               0 :       reflowContent = true;
     503                 :     }
     504                 : 
     505                 :     FinishReflowChild(mLegendFrame, aPresContext, &legendReflowState, 
     506               0 :                       legendDesiredSize, 0, 0, NS_FRAME_NO_MOVE_FRAME);    
     507               0 :   } else if (!mLegendFrame) {
     508               0 :     mLegendRect.SetEmpty();
     509               0 :     mLegendSpace = 0;
     510                 :   } else {
     511                 :     // mLegendSpace and mLegendRect haven't changed, but we need
     512                 :     // the used margin when placing the legend.
     513               0 :     legendMargin = mLegendFrame->GetUsedMargin();
     514                 :   }
     515                 : 
     516                 :   // reflow the content frame only if needed
     517               0 :   if (reflowContent) {
     518                 :     nsHTMLReflowState kidReflowState(aPresContext, aReflowState, mContentFrame,
     519               0 :                                      availSize);
     520                 :     // Our child is "height:100%" but we actually want its height to be reduced
     521                 :     // by the amount of content-height the legend is eating up, unless our
     522                 :     // height is unconstrained (in which case the child's will be too).
     523               0 :     if (aReflowState.ComputedHeight() != NS_UNCONSTRAINEDSIZE) {
     524               0 :       kidReflowState.SetComputedHeight(NS_MAX(0, aReflowState.ComputedHeight() - mLegendSpace));
     525                 :     }
     526                 : 
     527                 :     kidReflowState.mComputedMinHeight =
     528               0 :       NS_MAX(0, aReflowState.mComputedMinHeight - mLegendSpace);
     529                 : 
     530               0 :     if (aReflowState.mComputedMaxHeight != NS_UNCONSTRAINEDSIZE) {
     531                 :       kidReflowState.mComputedMaxHeight =
     532               0 :         NS_MAX(0, aReflowState.mComputedMaxHeight - mLegendSpace);
     533                 :     }
     534                 : 
     535               0 :     nsHTMLReflowMetrics kidDesiredSize(aDesiredSize.mFlags);
     536                 :     // Reflow the frame
     537               0 :     NS_ASSERTION(kidReflowState.mComputedMargin == nsMargin(0,0,0,0),
     538                 :                  "Margins on anonymous fieldset child not supported!");
     539               0 :     nsPoint pt(borderPadding.left, borderPadding.top + mLegendSpace);
     540                 :     ReflowChild(mContentFrame, aPresContext, kidDesiredSize, kidReflowState,
     541               0 :                 pt.x, pt.y, 0, aStatus);
     542                 : 
     543                 :     FinishReflowChild(mContentFrame, aPresContext, &kidReflowState, 
     544               0 :                       kidDesiredSize, pt.x, pt.y, 0);
     545               0 :     NS_FRAME_TRACE_REFLOW_OUT("FieldSet::Reflow", aStatus);
     546                 :   }
     547                 : 
     548               0 :   nsRect contentRect(0,0,0,0);
     549               0 :   if (mContentFrame) {
     550                 :     // We don't support margins on mContentFrame, so our "content rect" is just
     551                 :     // its rect.
     552               0 :     contentRect = mContentFrame->GetRect();
     553                 :   }
     554                 : 
     555                 :   // use the computed width if the inner content does not fill it
     556               0 :   if (aReflowState.ComputedWidth() > contentRect.width) {
     557               0 :     contentRect.width = aReflowState.ComputedWidth();
     558                 :   }
     559                 : 
     560               0 :   if (mLegendFrame) {
     561                 :     // if the content rect is larger then the  legend we can align the legend
     562               0 :     if (contentRect.width > mLegendRect.width) {
     563               0 :       PRInt32 align = static_cast<nsLegendFrame*>(mLegendFrame)->GetAlign();
     564                 : 
     565               0 :       switch(align) {
     566                 :         case NS_STYLE_TEXT_ALIGN_RIGHT:
     567               0 :           mLegendRect.x = contentRect.width - mLegendRect.width + borderPadding.left;
     568               0 :           break;
     569                 :         case NS_STYLE_TEXT_ALIGN_CENTER:
     570                 :           // Note: rounding removed; there doesn't seem to be any need
     571               0 :           mLegendRect.x = contentRect.width / 2 - mLegendRect.width / 2 + borderPadding.left;
     572               0 :           break;
     573                 :       }
     574                 :   
     575                 :     } else {
     576                 :       // otherwise make place for the legend
     577               0 :       contentRect.width = mLegendRect.width;
     578                 :     }
     579                 :     // place the legend
     580               0 :     nsRect actualLegendRect(mLegendRect);
     581               0 :     actualLegendRect.Deflate(legendMargin);
     582                 : 
     583               0 :     nsPoint curOrigin = mLegendFrame->GetPosition();
     584                 : 
     585                 :     // only if the origin changed
     586               0 :     if ((curOrigin.x != mLegendRect.x) || (curOrigin.y != mLegendRect.y)) {
     587               0 :       mLegendFrame->SetPosition(nsPoint(actualLegendRect.x , actualLegendRect.y));
     588               0 :       nsContainerFrame::PositionFrameView(mLegendFrame);
     589                 : 
     590                 :       // We need to recursively process the legend frame's
     591                 :       // children since we're moving the frame after Reflow.
     592               0 :       nsContainerFrame::PositionChildViews(mLegendFrame);
     593                 :     }
     594                 :   }
     595                 : 
     596                 :   // Return our size and our result
     597               0 :   if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) {
     598                 :     aDesiredSize.height = mLegendSpace + 
     599               0 :                           borderPadding.TopBottom() +
     600               0 :                           contentRect.height;
     601                 :   } else {
     602               0 :     nscoord min = borderPadding.TopBottom() + mLegendRect.height;
     603                 :     aDesiredSize.height =
     604               0 :       aReflowState.ComputedHeight() + borderPadding.TopBottom();
     605               0 :     if (aDesiredSize.height < min)
     606               0 :       aDesiredSize.height = min;
     607                 :   }
     608               0 :   aDesiredSize.width = contentRect.width + borderPadding.LeftRight();
     609               0 :   aDesiredSize.SetOverflowAreasToDesiredBounds();
     610               0 :   if (mLegendFrame)
     611               0 :     ConsiderChildOverflow(aDesiredSize.mOverflowAreas, mLegendFrame);
     612               0 :   if (mContentFrame)
     613               0 :     ConsiderChildOverflow(aDesiredSize.mOverflowAreas, mContentFrame);
     614               0 :   FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowState, aStatus);
     615                 : 
     616               0 :   Invalidate(aDesiredSize.VisualOverflow());
     617                 : 
     618               0 :   NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
     619               0 :   return NS_OK;
     620                 : }
     621                 : 
     622                 : PRIntn
     623               0 : nsFieldSetFrame::GetSkipSides() const
     624                 : {
     625               0 :   return 0;
     626                 : }
     627                 : 
     628                 : NS_IMETHODIMP
     629               0 : nsFieldSetFrame::AppendFrames(ChildListID    aListID,
     630                 :                               nsFrameList&   aFrameList)
     631                 : {
     632                 :   // aFrameList is not allowed to contain "the legend" for this fieldset
     633               0 :   ReparentFrameList(aFrameList);
     634               0 :   return mContentFrame->AppendFrames(aListID, aFrameList);
     635                 : }
     636                 : 
     637                 : NS_IMETHODIMP
     638               0 : nsFieldSetFrame::InsertFrames(ChildListID    aListID,
     639                 :                               nsIFrame*      aPrevFrame,
     640                 :                               nsFrameList&   aFrameList)
     641                 : {
     642               0 :   NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this ||
     643                 :                aPrevFrame->GetParent() == mContentFrame,
     644                 :                "inserting after sibling frame with different parent");
     645                 : 
     646                 :   // aFrameList is not allowed to contain "the legend" for this fieldset
     647               0 :   ReparentFrameList(aFrameList);
     648               0 :   if (NS_UNLIKELY(aPrevFrame == mLegendFrame)) {
     649               0 :     aPrevFrame = nsnull;
     650                 :   }
     651               0 :   return mContentFrame->InsertFrames(aListID, aPrevFrame, aFrameList);
     652                 : }
     653                 : 
     654                 : NS_IMETHODIMP
     655               0 : nsFieldSetFrame::RemoveFrame(ChildListID    aListID,
     656                 :                              nsIFrame*      aOldFrame)
     657                 : {
     658                 :   // For reference, see bug 70648, bug 276104 and bug 236071.
     659               0 :   NS_ASSERTION(aOldFrame != mLegendFrame, "Cannot remove mLegendFrame here");
     660               0 :   return mContentFrame->RemoveFrame(aListID, aOldFrame);
     661                 : }
     662                 : 
     663                 : #ifdef ACCESSIBILITY
     664                 : already_AddRefed<nsAccessible>
     665               0 : nsFieldSetFrame::CreateAccessible()
     666                 : {
     667               0 :   nsAccessibilityService* accService = nsIPresShell::AccService();
     668               0 :   if (accService) {
     669                 :     return accService->CreateHTMLGroupboxAccessible(mContent,
     670               0 :                                                     PresContext()->PresShell());
     671                 :   }
     672                 : 
     673               0 :   return nsnull;
     674                 : }
     675                 : #endif
     676                 : 
     677                 : void
     678               0 : nsFieldSetFrame::ReparentFrameList(const nsFrameList& aFrameList)
     679                 : {
     680               0 :   nsFrameManager* frameManager = PresContext()->FrameManager();
     681               0 :   for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
     682               0 :     NS_ASSERTION(mLegendFrame || e.get()->GetType() != nsGkAtoms::legendFrame,
     683                 :                  "The fieldset's legend is not allowed in this list");
     684               0 :     e.get()->SetParent(mContentFrame);
     685               0 :     frameManager->ReparentStyleContext(e.get());
     686                 :   }
     687               0 : }
     688                 : 
     689                 : nscoord
     690               0 : nsFieldSetFrame::GetBaseline() const
     691                 : {
     692                 :   // We know mContentFrame is a block, so calling GetBaseline() on it will do
     693                 :   // the right thing (that being to return the baseline of the last line).
     694               0 :   NS_ASSERTION(nsLayoutUtils::GetAsBlock(mContentFrame),
     695                 :                "Unexpected mContentFrame");
     696               0 :   return mContentFrame->GetPosition().y + mContentFrame->GetBaseline();
     697                 : }

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