LCOV - code coverage report
Current view: directory - layout/generic - nsAbsoluteContainingBlock.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 202 0 0.0 %
Date: 2012-06-02 Functions: 15 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                 : /*
      39                 :  * code for managing absolutely positioned children of a rendering
      40                 :  * object that is a containing block for them
      41                 :  */
      42                 : 
      43                 : #include "nsCOMPtr.h"
      44                 : #include "nsAbsoluteContainingBlock.h"
      45                 : #include "nsContainerFrame.h"
      46                 : #include "nsIPresShell.h"
      47                 : #include "nsHTMLParts.h"
      48                 : #include "nsPresContext.h"
      49                 : #include "nsFrameManager.h"
      50                 : #include "nsCSSFrameConstructor.h"
      51                 : 
      52                 : #ifdef DEBUG
      53                 : #include "nsBlockFrame.h"
      54                 : #endif
      55                 : 
      56                 : nsresult
      57               0 : nsAbsoluteContainingBlock::SetInitialChildList(nsIFrame*       aDelegatingFrame,
      58                 :                                                ChildListID     aListID,
      59                 :                                                nsFrameList&    aChildList)
      60                 : {
      61               0 :   NS_PRECONDITION(GetChildListID() == aListID, "unexpected child list name");
      62                 : #ifdef NS_DEBUG
      63               0 :   nsFrame::VerifyDirtyBitSet(aChildList);
      64                 : #endif
      65               0 :   mAbsoluteFrames.SetFrames(aChildList);
      66               0 :   return NS_OK;
      67                 : }
      68                 : 
      69                 : nsresult
      70               0 : nsAbsoluteContainingBlock::AppendFrames(nsIFrame*      aDelegatingFrame,
      71                 :                                         ChildListID    aListID,
      72                 :                                         nsFrameList&   aFrameList)
      73                 : {
      74               0 :   NS_ASSERTION(GetChildListID() == aListID, "unexpected child list");
      75                 : 
      76                 :   // Append the frames to our list of absolutely positioned frames
      77                 : #ifdef NS_DEBUG
      78               0 :   nsFrame::VerifyDirtyBitSet(aFrameList);
      79                 : #endif
      80               0 :   mAbsoluteFrames.AppendFrames(nsnull, aFrameList);
      81                 : 
      82                 :   // no damage to intrinsic widths, since absolutely positioned frames can't
      83                 :   // change them
      84               0 :   aDelegatingFrame->PresContext()->PresShell()->
      85                 :     FrameNeedsReflow(aDelegatingFrame, nsIPresShell::eResize,
      86               0 :                      NS_FRAME_HAS_DIRTY_CHILDREN);
      87                 : 
      88               0 :   return NS_OK;
      89                 : }
      90                 : 
      91                 : nsresult
      92               0 : nsAbsoluteContainingBlock::InsertFrames(nsIFrame*      aDelegatingFrame,
      93                 :                                         ChildListID    aListID,
      94                 :                                         nsIFrame*      aPrevFrame,
      95                 :                                         nsFrameList&   aFrameList)
      96                 : {
      97               0 :   NS_ASSERTION(GetChildListID() == aListID, "unexpected child list");
      98               0 :   NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == aDelegatingFrame,
      99                 :                "inserting after sibling frame with different parent");
     100                 : 
     101                 : #ifdef NS_DEBUG
     102               0 :   nsFrame::VerifyDirtyBitSet(aFrameList);
     103                 : #endif
     104               0 :   mAbsoluteFrames.InsertFrames(nsnull, aPrevFrame, aFrameList);
     105                 : 
     106                 :   // no damage to intrinsic widths, since absolutely positioned frames can't
     107                 :   // change them
     108               0 :   aDelegatingFrame->PresContext()->PresShell()->
     109                 :     FrameNeedsReflow(aDelegatingFrame, nsIPresShell::eResize,
     110               0 :                      NS_FRAME_HAS_DIRTY_CHILDREN);
     111                 : 
     112               0 :   return NS_OK;
     113                 : }
     114                 : 
     115                 : void
     116               0 : nsAbsoluteContainingBlock::RemoveFrame(nsIFrame*       aDelegatingFrame,
     117                 :                                        ChildListID     aListID,
     118                 :                                        nsIFrame*       aOldFrame)
     119                 : {
     120               0 :   NS_ASSERTION(GetChildListID() == aListID, "unexpected child list");
     121               0 :   nsIFrame* nif = aOldFrame->GetNextInFlow();
     122               0 :   if (nif) {
     123               0 :     static_cast<nsContainerFrame*>(nif->GetParent())
     124               0 :       ->DeleteNextInFlowChild(aOldFrame->PresContext(), nif, false);
     125                 :   }
     126                 : 
     127               0 :   mAbsoluteFrames.DestroyFrame(aOldFrame);
     128               0 : }
     129                 : 
     130                 : nsresult
     131               0 : nsAbsoluteContainingBlock::Reflow(nsContainerFrame*        aDelegatingFrame,
     132                 :                                   nsPresContext*           aPresContext,
     133                 :                                   const nsHTMLReflowState& aReflowState,
     134                 :                                   nsReflowStatus&          aReflowStatus,
     135                 :                                   nscoord                  aContainingBlockWidth,
     136                 :                                   nscoord                  aContainingBlockHeight,
     137                 :                                   bool                     aConstrainHeight,
     138                 :                                   bool                     aCBWidthChanged,
     139                 :                                   bool                     aCBHeightChanged,
     140                 :                                   nsOverflowAreas*         aOverflowAreas)
     141                 : {
     142               0 :   nsReflowStatus reflowStatus = NS_FRAME_COMPLETE;
     143                 : 
     144               0 :   bool reflowAll = aReflowState.ShouldReflowAllKids();
     145                 : 
     146                 :   nsIFrame* kidFrame;
     147               0 :   nsOverflowContinuationTracker tracker(aPresContext, aDelegatingFrame, true);
     148               0 :   for (kidFrame = mAbsoluteFrames.FirstChild(); kidFrame; kidFrame = kidFrame->GetNextSibling()) {
     149               0 :     bool kidNeedsReflow = reflowAll || NS_SUBTREE_DIRTY(kidFrame) ||
     150               0 :       FrameDependsOnContainer(kidFrame, aCBWidthChanged, aCBHeightChanged);
     151               0 :     if (kidNeedsReflow && !aPresContext->HasPendingInterrupt()) {
     152                 :       // Reflow the frame
     153               0 :       nsReflowStatus  kidStatus = NS_FRAME_COMPLETE;
     154                 :       ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, aReflowState,
     155                 :                           aContainingBlockWidth, aContainingBlockHeight,
     156                 :                           aConstrainHeight, kidFrame, kidStatus,
     157               0 :                           aOverflowAreas);
     158               0 :       nsIFrame* nextFrame = kidFrame->GetNextInFlow();
     159               0 :       if (!NS_FRAME_IS_FULLY_COMPLETE(kidStatus)) {
     160                 :         // Need a continuation
     161               0 :         if (!nextFrame) {
     162                 :           nsresult rv = aPresContext->PresShell()->FrameConstructor()->
     163               0 :             CreateContinuingFrame(aPresContext, kidFrame, aDelegatingFrame, &nextFrame);
     164               0 :           NS_ENSURE_SUCCESS(rv, rv);
     165                 :         }
     166                 :         // Add it as an overflow container.
     167                 :         //XXXfr This is a hack to fix some of our printing dataloss.
     168                 :         // See bug 154892. Not sure how to do it "right" yet; probably want
     169                 :         // to keep continuations within an nsAbsoluteContainingBlock eventually.
     170               0 :         tracker.Insert(nextFrame, kidStatus);
     171               0 :         NS_MergeReflowStatusInto(&reflowStatus, kidStatus);
     172                 :       }
     173                 :       else {
     174                 :         // Delete any continuations
     175               0 :         if (nextFrame) {
     176               0 :           tracker.Finish(kidFrame);
     177               0 :           static_cast<nsContainerFrame*>(nextFrame->GetParent())
     178               0 :             ->DeleteNextInFlowChild(aPresContext, nextFrame, true);
     179                 :         }
     180                 :       }
     181                 :     }
     182                 :     else {
     183               0 :       tracker.Skip(kidFrame, reflowStatus);
     184               0 :       if (aOverflowAreas) {
     185               0 :         aDelegatingFrame->ConsiderChildOverflow(*aOverflowAreas, kidFrame);
     186                 :       }
     187                 :     }
     188                 : 
     189                 :     // Make a CheckForInterrupt call, here, not just HasPendingInterrupt.  That
     190                 :     // will make sure that we end up reflowing aDelegatingFrame in cases when
     191                 :     // one of our kids interrupted.  Otherwise we'd set the dirty or
     192                 :     // dirty-children bit on the kid in the condition below, and then when
     193                 :     // reflow completes and we go to mark dirty bits on all ancestors of that
     194                 :     // kid we'll immediately bail out, because the kid already has a dirty bit.
     195                 :     // In particular, we won't set any dirty bits on aDelegatingFrame, so when
     196                 :     // the following reflow happens we won't reflow the kid in question.  This
     197                 :     // might be slightly suboptimal in cases where |kidFrame| itself did not
     198                 :     // interrupt, since we'll trigger a reflow of it too when it's not strictly
     199                 :     // needed.  But the logic to not do that is enough more complicated, and
     200                 :     // the case enough of an edge case, that this is probably better.
     201               0 :     if (kidNeedsReflow && aPresContext->CheckForInterrupt(aDelegatingFrame)) {
     202               0 :       if (aDelegatingFrame->GetStateBits() & NS_FRAME_IS_DIRTY) {
     203               0 :         kidFrame->AddStateBits(NS_FRAME_IS_DIRTY);
     204                 :       } else {
     205               0 :         kidFrame->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
     206                 :       }
     207                 :     }
     208                 :   }
     209                 : 
     210                 :   // Abspos frames can't cause their parent to be incomplete,
     211                 :   // only overflow incomplete.
     212               0 :   if (NS_FRAME_IS_NOT_COMPLETE(reflowStatus))
     213               0 :     NS_FRAME_SET_OVERFLOW_INCOMPLETE(reflowStatus);
     214                 : 
     215               0 :   NS_MergeReflowStatusInto(&aReflowStatus, reflowStatus);
     216               0 :   return NS_OK;
     217                 : }
     218                 : 
     219               0 : static inline bool IsFixedPaddingSize(const nsStyleCoord& aCoord)
     220               0 :   { return aCoord.ConvertsToLength(); }
     221               0 : static inline bool IsFixedMarginSize(const nsStyleCoord& aCoord)
     222               0 :   { return aCoord.ConvertsToLength(); }
     223               0 : static inline bool IsFixedOffset(const nsStyleCoord& aCoord)
     224               0 :   { return aCoord.ConvertsToLength(); }
     225                 : 
     226                 : bool
     227               0 : nsAbsoluteContainingBlock::FrameDependsOnContainer(nsIFrame* f,
     228                 :                                                    bool aCBWidthChanged,
     229                 :                                                    bool aCBHeightChanged)
     230                 : {
     231               0 :   const nsStylePosition* pos = f->GetStylePosition();
     232                 :   // See if f's position might have changed because it depends on a
     233                 :   // placeholder's position
     234                 :   // This can happen in the following cases:
     235                 :   // 1) Vertical positioning.  "top" must be auto and "bottom" must be auto
     236                 :   //    (otherwise the vertical position is completely determined by
     237                 :   //    whichever of them is not auto and the height).
     238                 :   // 2) Horizontal positioning.  "left" must be auto and "right" must be auto
     239                 :   //    (otherwise the horizontal position is completely determined by
     240                 :   //    whichever of them is not auto and the width).
     241                 :   // See nsHTMLReflowState::InitAbsoluteConstraints -- these are the
     242                 :   // only cases when we call CalculateHypotheticalBox().
     243               0 :   if ((pos->mOffset.GetTopUnit() == eStyleUnit_Auto &&
     244               0 :        pos->mOffset.GetBottomUnit() == eStyleUnit_Auto) ||
     245               0 :       (pos->mOffset.GetLeftUnit() == eStyleUnit_Auto &&
     246               0 :        pos->mOffset.GetRightUnit() == eStyleUnit_Auto)) {
     247               0 :     return true;
     248                 :   }
     249               0 :   if (!aCBWidthChanged && !aCBHeightChanged) {
     250                 :     // skip getting style data
     251               0 :     return false;
     252                 :   }
     253               0 :   const nsStylePadding* padding = f->GetStylePadding();
     254               0 :   const nsStyleMargin* margin = f->GetStyleMargin();
     255               0 :   if (aCBWidthChanged) {
     256                 :     // See if f's width might have changed.
     257                 :     // If border-left, border-right, padding-left, padding-right,
     258                 :     // width, min-width, and max-width are all lengths, 'none', or enumerated,
     259                 :     // then our frame width does not depend on the parent width.
     260                 :     // Note that borders never depend on the parent width
     261                 :     // XXX All of the enumerated values except -moz-available are ok too.
     262               0 :     if (pos->WidthDependsOnContainer() ||
     263               0 :         pos->MinWidthDependsOnContainer() ||
     264               0 :         pos->MaxWidthDependsOnContainer() ||
     265               0 :         !IsFixedPaddingSize(padding->mPadding.GetLeft()) ||
     266               0 :         !IsFixedPaddingSize(padding->mPadding.GetRight())) {
     267               0 :       return true;
     268                 :     }
     269                 : 
     270                 :     // See if f's position might have changed. If we're RTL then the
     271                 :     // rules are slightly different. We'll assume percentage or auto
     272                 :     // margins will always induce a dependency on the size
     273               0 :     if (!IsFixedMarginSize(margin->mMargin.GetLeft()) ||
     274               0 :         !IsFixedMarginSize(margin->mMargin.GetRight())) {
     275               0 :       return true;
     276                 :     }
     277               0 :     if (f->GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
     278                 :       // Note that even if 'left' is a length, our position can
     279                 :       // still depend on the containing block width, because if
     280                 :       // 'right' is also a length we will discard 'left' and be
     281                 :       // positioned relative to the containing block right edge.
     282                 :       // 'left' length and 'right' auto is the only combination
     283                 :       // we can be sure of.
     284               0 :       if (!IsFixedOffset(pos->mOffset.GetLeft()) ||
     285               0 :           pos->mOffset.GetRightUnit() != eStyleUnit_Auto) {
     286               0 :         return true;
     287                 :       }
     288                 :     } else {
     289               0 :       if (!IsFixedOffset(pos->mOffset.GetLeft())) {
     290               0 :         return true;
     291                 :       }
     292                 :     }
     293                 :   }
     294               0 :   if (aCBHeightChanged) {
     295                 :     // See if f's height might have changed.
     296                 :     // If border-top, border-bottom, padding-top, padding-bottom,
     297                 :     // min-height, and max-height are all lengths or 'none',
     298                 :     // and height is a length or height and bottom are auto and top is not auto,
     299                 :     // then our frame height does not depend on the parent height.
     300                 :     // Note that borders never depend on the parent height
     301               0 :     if ((pos->HeightDependsOnContainer() &&
     302               0 :          !(pos->mHeight.GetUnit() == eStyleUnit_Auto &&
     303               0 :            pos->mOffset.GetBottomUnit() == eStyleUnit_Auto &&
     304               0 :            pos->mOffset.GetTopUnit() != eStyleUnit_Auto)) ||
     305               0 :         pos->MinHeightDependsOnContainer() ||
     306               0 :         pos->MaxHeightDependsOnContainer() ||
     307               0 :         !IsFixedPaddingSize(padding->mPadding.GetTop()) ||
     308               0 :         !IsFixedPaddingSize(padding->mPadding.GetBottom())) { 
     309               0 :       return true;
     310                 :     }
     311                 :       
     312                 :     // See if f's position might have changed.
     313               0 :     if (!IsFixedMarginSize(margin->mMargin.GetTop()) ||
     314               0 :         !IsFixedMarginSize(margin->mMargin.GetBottom())) {
     315               0 :       return true;
     316                 :     }
     317               0 :     if (!IsFixedOffset(pos->mOffset.GetTop())) {
     318               0 :       return true;
     319                 :     }
     320                 :   }
     321               0 :   return false;
     322                 : }
     323                 : 
     324                 : void
     325               0 : nsAbsoluteContainingBlock::DestroyFrames(nsIFrame* aDelegatingFrame,
     326                 :                                          nsIFrame* aDestructRoot)
     327                 : {
     328               0 :   mAbsoluteFrames.DestroyFramesFrom(aDestructRoot);
     329               0 : }
     330                 : 
     331                 : void
     332               0 : nsAbsoluteContainingBlock::MarkSizeDependentFramesDirty()
     333                 : {
     334               0 :   DoMarkFramesDirty(false);
     335               0 : }
     336                 : 
     337                 : void
     338               0 : nsAbsoluteContainingBlock::MarkAllFramesDirty()
     339                 : {
     340               0 :   DoMarkFramesDirty(true);
     341               0 : }
     342                 : 
     343                 : void
     344               0 : nsAbsoluteContainingBlock::DoMarkFramesDirty(bool aMarkAllDirty)
     345                 : {
     346               0 :   for (nsIFrame* kidFrame = mAbsoluteFrames.FirstChild();
     347                 :        kidFrame;
     348                 :        kidFrame = kidFrame->GetNextSibling()) {
     349               0 :     if (aMarkAllDirty) {
     350               0 :       kidFrame->AddStateBits(NS_FRAME_IS_DIRTY);
     351               0 :     } else if (FrameDependsOnContainer(kidFrame, true, true)) {
     352                 :       // Add the weakest flags that will make sure we reflow this frame later
     353               0 :       kidFrame->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
     354                 :     }
     355                 :   }
     356               0 : }
     357                 : 
     358                 : // XXX Optimize the case where it's a resize reflow and the absolutely
     359                 : // positioned child has the exact same size and position and skip the
     360                 : // reflow...
     361                 : 
     362                 : // When bug 154892 is checked in, make sure that when 
     363                 : // GetChildListID() == kFixedList, the height is unconstrained.
     364                 : // since we don't allow replicated frames to split.
     365                 : 
     366                 : nsresult
     367               0 : nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame*                aDelegatingFrame,
     368                 :                                                nsPresContext*          aPresContext,
     369                 :                                                const nsHTMLReflowState& aReflowState,
     370                 :                                                nscoord                  aContainingBlockWidth,
     371                 :                                                nscoord                  aContainingBlockHeight,
     372                 :                                                bool                     aConstrainHeight,
     373                 :                                                nsIFrame*                aKidFrame,
     374                 :                                                nsReflowStatus&          aStatus,
     375                 :                                                nsOverflowAreas*         aOverflowAreas)
     376                 : {
     377                 : #ifdef DEBUG
     378               0 :   if (nsBlockFrame::gNoisyReflow) {
     379               0 :     nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
     380               0 :     printf("abs pos ");
     381               0 :     if (aKidFrame) {
     382               0 :       nsAutoString name;
     383               0 :       aKidFrame->GetFrameName(name);
     384               0 :       printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
     385                 :     }
     386                 : 
     387                 :     char width[16];
     388                 :     char height[16];
     389               0 :     PrettyUC(aReflowState.availableWidth, width);
     390               0 :     PrettyUC(aReflowState.availableHeight, height);
     391               0 :     printf(" a=%s,%s ", width, height);
     392               0 :     PrettyUC(aReflowState.ComputedWidth(), width);
     393               0 :     PrettyUC(aReflowState.ComputedHeight(), height);
     394               0 :     printf("c=%s,%s \n", width, height);
     395                 :   }
     396               0 :   AutoNoisyIndenter indent(nsBlockFrame::gNoisy);
     397                 : #endif // DEBUG
     398                 : 
     399                 :   // Store position and overflow rect so taht we can invalidate the correct
     400                 :   // area if the position changes
     401               0 :   nsRect oldOverflowRect(aKidFrame->GetVisualOverflowRect() +
     402               0 :                          aKidFrame->GetPosition());
     403               0 :   nsRect oldRect = aKidFrame->GetRect();
     404                 : 
     405                 :   nsresult  rv;
     406                 :   // Get the border values
     407               0 :   const nsMargin& border = aReflowState.mStyleBorder->GetActualBorder();
     408                 : 
     409               0 :   nscoord availWidth = aContainingBlockWidth;
     410               0 :   if (availWidth == -1) {
     411               0 :     NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
     412                 :                  "Must have a useful width _somewhere_");
     413                 :     availWidth =
     414               0 :       aReflowState.ComputedWidth() + aReflowState.mComputedPadding.LeftRight();
     415                 :   }
     416                 :     
     417               0 :   nsHTMLReflowMetrics kidDesiredSize;
     418                 :   nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
     419                 :                                    nsSize(availWidth, NS_UNCONSTRAINEDSIZE),
     420                 :                                    aContainingBlockWidth,
     421               0 :                                    aContainingBlockHeight);
     422                 : 
     423                 :   // Send the WillReflow() notification and position the frame
     424               0 :   aKidFrame->WillReflow(aPresContext);
     425                 : 
     426                 :   bool constrainHeight = (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE)
     427                 :     && aConstrainHeight
     428                 :        // Don't split if told not to (e.g. for fixed frames)
     429               0 :     && (aDelegatingFrame->GetType() != nsGkAtoms::inlineFrame)
     430                 :        //XXX we don't handle splitting frames for inline absolute containing blocks yet
     431               0 :     && (aKidFrame->GetRect().y <= aReflowState.availableHeight);
     432                 :        // Don't split things below the fold. (Ideally we shouldn't *have*
     433                 :        // anything totally below the fold, but we can't position frames
     434                 :        // across next-in-flow breaks yet.
     435               0 :   if (constrainHeight) {
     436                 :     kidReflowState.availableHeight = aReflowState.availableHeight - border.top
     437               0 :                                      - kidReflowState.mComputedMargin.top;
     438               0 :     if (NS_AUTOOFFSET != kidReflowState.mComputedOffsets.top)
     439               0 :       kidReflowState.availableHeight -= kidReflowState.mComputedOffsets.top;
     440                 :   }
     441                 : 
     442                 :   // Do the reflow
     443               0 :   rv = aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowState, aStatus);
     444                 : 
     445                 :   // If we're solving for 'left' or 'top', then compute it now that we know the
     446                 :   // width/height
     447               0 :   if ((NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) ||
     448                 :       (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top)) {
     449               0 :     if (-1 == aContainingBlockWidth) {
     450                 :       // Get the containing block width/height
     451                 :       kidReflowState.ComputeContainingBlockRectangle(aPresContext,
     452                 :                                                      &aReflowState,
     453                 :                                                      aContainingBlockWidth,
     454               0 :                                                      aContainingBlockHeight);
     455                 :     }
     456                 : 
     457               0 :     if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) {
     458               0 :       NS_ASSERTION(NS_AUTOOFFSET != kidReflowState.mComputedOffsets.right,
     459                 :                    "Can't solve for both left and right");
     460                 :       kidReflowState.mComputedOffsets.left = aContainingBlockWidth -
     461                 :                                              kidReflowState.mComputedOffsets.right -
     462                 :                                              kidReflowState.mComputedMargin.right -
     463                 :                                              kidDesiredSize.width -
     464               0 :                                              kidReflowState.mComputedMargin.left;
     465                 :     }
     466               0 :     if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top) {
     467                 :       kidReflowState.mComputedOffsets.top = aContainingBlockHeight -
     468                 :                                             kidReflowState.mComputedOffsets.bottom -
     469                 :                                             kidReflowState.mComputedMargin.bottom -
     470                 :                                             kidDesiredSize.height -
     471               0 :                                             kidReflowState.mComputedMargin.top;
     472                 :     }
     473                 :   }
     474                 : 
     475                 :   // Position the child relative to our padding edge
     476                 :   nsRect  rect(border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left,
     477                 :                border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top,
     478               0 :                kidDesiredSize.width, kidDesiredSize.height);
     479               0 :   aKidFrame->SetRect(rect);
     480                 : 
     481               0 :   nsIView* view = aKidFrame->GetView();
     482               0 :   if (view) {
     483                 :     // Size and position the view and set its opacity, visibility, content
     484                 :     // transparency, and clip
     485                 :     nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
     486               0 :                                                kidDesiredSize.VisualOverflow());
     487                 :   } else {
     488               0 :     nsContainerFrame::PositionChildViews(aKidFrame);
     489                 :   }
     490                 : 
     491               0 :   if (oldRect.TopLeft() != rect.TopLeft() || 
     492               0 :       (aDelegatingFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
     493                 :     // The frame moved
     494               0 :     aKidFrame->GetParent()->Invalidate(oldOverflowRect);
     495               0 :     aKidFrame->InvalidateFrameSubtree();
     496               0 :   } else if (oldRect.Size() != rect.Size()) {
     497                 :     // Invalidate the area where the frame changed size.
     498               0 :     nscoord innerWidth = NS_MIN(oldRect.width, rect.width);
     499               0 :     nscoord innerHeight = NS_MIN(oldRect.height, rect.height);
     500               0 :     nscoord outerWidth = NS_MAX(oldRect.width, rect.width);
     501               0 :     nscoord outerHeight = NS_MAX(oldRect.height, rect.height);
     502                 :     aKidFrame->GetParent()->Invalidate(
     503               0 :         nsRect(rect.x + innerWidth, rect.y, outerWidth - innerWidth, outerHeight));
     504                 :     // Invalidate the horizontal strip
     505                 :     aKidFrame->GetParent()->Invalidate(
     506               0 :         nsRect(rect.x, rect.y + innerHeight, outerWidth, outerHeight - innerHeight));
     507                 :   }
     508               0 :   aKidFrame->DidReflow(aPresContext, &kidReflowState, NS_FRAME_REFLOW_FINISHED);
     509                 : 
     510                 : #ifdef DEBUG
     511               0 :   if (nsBlockFrame::gNoisyReflow) {
     512               0 :     nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent - 1);
     513               0 :     printf("abs pos ");
     514               0 :     if (aKidFrame) {
     515               0 :       nsAutoString name;
     516               0 :       aKidFrame->GetFrameName(name);
     517               0 :       printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
     518                 :     }
     519                 :     printf("%p rect=%d,%d,%d,%d\n", static_cast<void*>(aKidFrame),
     520               0 :            rect.x, rect.y, rect.width, rect.height);
     521                 :   }
     522                 : #endif
     523                 : 
     524               0 :   if (aOverflowAreas) {
     525               0 :     aOverflowAreas->UnionWith(kidDesiredSize.mOverflowAreas + rect.TopLeft());
     526                 :   }
     527                 : 
     528               0 :   return rv;
     529                 : }
     530                 : 
     531                 : #ifdef DEBUG
     532               0 :  void nsAbsoluteContainingBlock::PrettyUC(nscoord aSize,
     533                 :                         char*   aBuf)
     534                 : {
     535               0 :   if (NS_UNCONSTRAINEDSIZE == aSize) {
     536               0 :     strcpy(aBuf, "UC");
     537                 :   }
     538                 :   else {
     539               0 :     if((PRInt32)0xdeadbeef == aSize)
     540                 :     {
     541               0 :       strcpy(aBuf, "deadbeef");
     542                 :     }
     543                 :     else {
     544               0 :       sprintf(aBuf, "%d", aSize);
     545                 :     }
     546                 :   }
     547               0 : }
     548                 : #endif

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