LCOV - app.info - layout/generic/nsHTMLReflowState.h

LCOV - code coverage report
| Current view: | directory - layout/generic - nsHTMLReflowState.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 26 | 0 | 0.0 %
| Date: | 2012-04-21 | 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.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                 : /* struct containing the input to nsIFrame::Reflow */
          39                 :
          40                 : #ifndef nsHTMLReflowState_h___
          41                 : #define nsHTMLReflowState_h___
          42                 :
          43                 : #include "nsMargin.h"
          44                 : #include "nsStyleCoord.h"
          45                 : #include "nsIFrame.h"
          46                 : #include "mozilla/AutoRestore.h"
          47                 :
          48                 : class nsPresContext;
          49                 : class nsRenderingContext;
          50                 : class nsFloatManager;
          51                 : class nsLineLayout;
          52                 : class nsIPercentHeightObserver;
          53                 :
          54                 : struct nsStyleDisplay;
          55                 : struct nsStyleVisibility;
          56                 : struct nsStylePosition;
          57                 : struct nsStyleBorder;
          58                 : struct nsStyleMargin;
          59                 : struct nsStylePadding;
          60                 : struct nsStyleText;
          61                 : struct nsHypotheticalBox;
          62                 :
          63                 : template <class NumericType>
          64                 : NumericType
          65               0 : NS_CSS_MINMAX(NumericType aValue, NumericType aMinValue, NumericType aMaxValue)
          66                 : {
          67               0 :   NumericType result = aValue;
          68               0 :   if (aMaxValue < result)
          69               0 :     result = aMaxValue;
          70               0 :   if (aMinValue > result)
          71               0 :     result = aMinValue;
          72               0 :   return result;
          73                 : }
          74                 :
          75                 : /**
          76                 :  * Constant used to indicate an unconstrained size.
          77                 :  *
          78                 :  * @see #Reflow()
          79                 :  */
          80                 : #define NS_UNCONSTRAINEDSIZE NS_MAXSIZE
          81                 :
          82                 : /**
          83                 :  * CSS Frame type. Included as part of the reflow state.
          84                 :  */
          85                 : typedef PRUint32  nsCSSFrameType;
          86                 :
          87                 : #define NS_CSS_FRAME_TYPE_UNKNOWN         0
          88                 : #define NS_CSS_FRAME_TYPE_INLINE          1
          89                 : #define NS_CSS_FRAME_TYPE_BLOCK           2  /* block-level in normal flow */
          90                 : #define NS_CSS_FRAME_TYPE_FLOATING        3
          91                 : #define NS_CSS_FRAME_TYPE_ABSOLUTE        4
          92                 : #define NS_CSS_FRAME_TYPE_INTERNAL_TABLE  5  /* row group frame, row frame, cell frame, ... */
          93                 :
          94                 : /**
          95                 :  * Bit-flag that indicates whether the element is replaced. Applies to inline,
          96                 :  * block-level, floating, and absolutely positioned elements
          97                 :  */
          98                 : #define NS_CSS_FRAME_TYPE_REPLACED                0x08000
          99                 :
         100                 : /**
         101                 :  * Bit-flag that indicates that the element is replaced and contains a block
         102                 :  * (eg some form controls).  Applies to inline, block-level, floating, and
         103                 :  * absolutely positioned elements.  Mutually exclusive with
         104                 :  * NS_CSS_FRAME_TYPE_REPLACED.
         105                 :  */
         106                 : #define NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK 0x10000
         107                 :
         108                 : /**
         109                 :  * Helper macros for telling whether items are replaced
         110                 :  */
         111                 : #define NS_FRAME_IS_REPLACED_NOBLOCK(_ft) \
         112                 :   (NS_CSS_FRAME_TYPE_REPLACED == ((_ft) & NS_CSS_FRAME_TYPE_REPLACED))
         113                 :
         114                 : #define NS_FRAME_IS_REPLACED(_ft)            \
         115                 :   (NS_FRAME_IS_REPLACED_NOBLOCK(_ft) ||      \
         116                 :    NS_FRAME_IS_REPLACED_CONTAINS_BLOCK(_ft))
         117                 :
         118                 : #define NS_FRAME_REPLACED(_ft) \
         119                 :   (NS_CSS_FRAME_TYPE_REPLACED | (_ft))
         120                 :
         121                 : #define NS_FRAME_IS_REPLACED_CONTAINS_BLOCK(_ft)         \
         122                 :   (NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK ==         \
         123                 :    ((_ft) & NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK))
         124                 :
         125                 : #define NS_FRAME_REPLACED_CONTAINS_BLOCK(_ft) \
         126                 :   (NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK | (_ft))
         127                 :
         128                 : /**
         129                 :  * A macro to extract the type. Masks off the 'replaced' bit-flag
         130                 :  */
         131                 : #define NS_FRAME_GET_TYPE(_ft)                           \
         132                 :   ((_ft) & ~(NS_CSS_FRAME_TYPE_REPLACED |                \
         133                 :              NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK))
         134                 :
         135                 : #define NS_INTRINSICSIZE    NS_UNCONSTRAINEDSIZE
         136                 : #define NS_AUTOHEIGHT       NS_UNCONSTRAINEDSIZE
         137                 : #define NS_AUTOMARGIN       NS_UNCONSTRAINEDSIZE
         138                 : #define NS_AUTOOFFSET       NS_UNCONSTRAINEDSIZE
         139                 : // NOTE: there are assumptions all over that these have the same value, namely NS_UNCONSTRAINEDSIZE
         140                 : //       if any are changed to be a value other than NS_UNCONSTRAINEDSIZE
         141                 : //       at least update AdjustComputedHeight/Width and test ad nauseum
         142                 :
         143                 : // A base class of nsHTMLReflowState that computes only the padding,
         144                 : // border, and margin, since those values are needed more often.
         145               0 : struct nsCSSOffsetState {
         146                 : public:
         147                 :   // the frame being reflowed
         148                 :   nsIFrame*           frame;
         149                 :
         150                 :   // rendering context to use for measurement
         151                 :   nsRenderingContext* rendContext;
         152                 :
         153                 :   // Computed margin values
         154                 :   nsMargin         mComputedMargin;
         155                 :
         156                 :   // Cached copy of the border + padding values
         157                 :   nsMargin         mComputedBorderPadding;
         158                 :
         159                 :   // Computed padding values
         160                 :   nsMargin         mComputedPadding;
         161                 :
         162                 :   // Callers using this constructor must call InitOffsets on their own.
         163               0 :   nsCSSOffsetState(nsIFrame *aFrame, nsRenderingContext *aRenderingContext)
         164                 :     : frame(aFrame)
         165               0 :     , rendContext(aRenderingContext)
         166                 :   {
         167               0 :   }
         168                 :
         169               0 :   nsCSSOffsetState(nsIFrame *aFrame, nsRenderingContext *aRenderingContext,
         170                 :                    nscoord aContainingBlockWidth)
         171                 :     : frame(aFrame)
         172               0 :     , rendContext(aRenderingContext)
         173                 :   {
         174               0 :     InitOffsets(aContainingBlockWidth, frame->GetType());
         175               0 :   }
         176                 :
         177                 : #ifdef DEBUG
         178                 :   // Reflow trace methods.  Defined in nsFrame.cpp so they have access
         179                 :   // to the display-reflow infrastructure.
         180                 :   static void* DisplayInitOffsetsEnter(nsIFrame* aFrame,
         181                 :                                        nsCSSOffsetState* aState,
         182                 :                                        nscoord aCBWidth,
         183                 :                                        const nsMargin* aBorder,
         184                 :                                        const nsMargin* aPadding);
         185                 :   static void DisplayInitOffsetsExit(nsIFrame* aFrame,
         186                 :                                      nsCSSOffsetState* aState,
         187                 :                                      void* aValue);
         188                 : #endif
         189                 :
         190                 : private:
         191                 :   /**
         192                 :    * Computes margin values from the specified margin style information, and
         193                 :    * fills in the mComputedMargin member.
         194                 :    * @return true if the margin is dependent on the containing block width
         195                 :    */
         196                 :   bool ComputeMargin(nscoord aContainingBlockWidth);
         197                 :
         198                 :   /**
         199                 :    * Computes padding values from the specified padding style information, and
         200                 :    * fills in the mComputedPadding member.
         201                 :    * @return true if the padding is dependent on the containing block width
         202                 :    */
         203                 :    bool ComputePadding(nscoord aContainingBlockWidth, nsIAtom* aFrameType);
         204                 :
         205                 : protected:
         206                 :
         207                 :   void InitOffsets(nscoord aContainingBlockWidth,
         208                 :                    nsIAtom* aFrameType,
         209                 :                    const nsMargin *aBorder = nsnull,
         210                 :                    const nsMargin *aPadding = nsnull);
         211                 :
         212                 :   /*
         213                 :    * Convert nsStyleCoord to nscoord when percentages depend on the
         214                 :    * containing block width, and enumerated values are for width,
         215                 :    * min-width, or max-width.  Does not handle auto widths.
         216                 :    */
         217                 :   inline nscoord ComputeWidthValue(nscoord aContainingBlockWidth,
         218                 :                                    nscoord aContentEdgeToBoxSizing,
         219                 :                                    nscoord aBoxSizingToMarginEdge,
         220                 :                                    const nsStyleCoord& aCoord);
         221                 :   // same as previous, but using mComputedBorderPadding, mComputedPadding,
         222                 :   // and mComputedMargin
         223                 :   nscoord ComputeWidthValue(nscoord aContainingBlockWidth,
         224                 :                             PRUint8 aBoxSizing,
         225                 :                             const nsStyleCoord& aCoord);
         226                 : };
         227                 :
         228                 : /**
         229                 :  * State passed to a frame during reflow or intrinsic size calculation.
         230                 :  *
         231                 :  * XXX Refactor so only a base class (nsSizingState?) is used for intrinsic
         232                 :  * size calculation.
         233                 :  *
         234                 :  * @see nsIFrame#Reflow()
         235                 :  */
         236               0 : struct nsHTMLReflowState : public nsCSSOffsetState {
         237                 :   // the reflow states are linked together. this is the pointer to the
         238                 :   // parent's reflow state
         239                 :   const nsHTMLReflowState* parentReflowState;
         240                 :
         241                 :   // pointer to the float manager associated with this area
         242                 :   nsFloatManager* mFloatManager;
         243                 :
         244                 :   // LineLayout object (only for inline reflow; set to NULL otherwise)
         245                 :   nsLineLayout*    mLineLayout;
         246                 :
         247                 :   // The appropriate reflow state for the containing block (for
         248                 :   // percentage widths, etc.) of this reflow state's frame.
         249                 :   const nsHTMLReflowState *mCBReflowState;
         250                 :
         251                 :   // the available width in which to reflow the frame. The space
         252                 :   // represents the amount of room for the frame's margin, border,
         253                 :   // padding, and content area. The frame size you choose should fit
         254                 :   // within the available width.
         255                 :   nscoord              availableWidth;
         256                 :
         257                 :   // A value of NS_UNCONSTRAINEDSIZE for the available height means
         258                 :   // you can choose whatever size you want. In galley mode the
         259                 :   // available height is always NS_UNCONSTRAINEDSIZE, and only page
         260                 :   // mode or multi-column layout involves a constrained height. The
         261                 :   // element's the top border and padding, and content, must fit. If the
         262                 :   // element is complete after reflow then its bottom border, padding
         263                 :   // and margin (and similar for its complete ancestors) will need to
         264                 :   // fit in this height.
         265                 :   nscoord              availableHeight;
         266                 :
         267                 :   // The type of frame, from css's perspective. This value is
         268                 :   // initialized by the Init method below.
         269                 :   nsCSSFrameType   mFrameType;
         270                 :
         271                 :   // The amount the in-flow position of the block is moving vertically relative
         272                 :   // to its previous in-flow position (i.e. the amount the line containing the
         273                 :   // block is moving).
         274                 :   // This should be zero for anything which is not a block outside, and it
         275                 :   // should be zero for anything which has a non-block parent.
         276                 :   // The intended use of this value is to allow the accurate determination
         277                 :   // of the potential impact of a float
         278                 :   // This takes on an arbitrary value the first time a block is reflowed
         279                 :   nscoord mBlockDelta;
         280                 :
         281                 : private:
         282                 :   // The computed width specifies the frame's content area width, and it does
         283                 :   // not apply to inline non-replaced elements
         284                 :   //
         285                 :   // For replaced inline frames, a value of NS_INTRINSICSIZE means you should
         286                 :   // use your intrinsic width as the computed width
         287                 :   //
         288                 :   // For block-level frames, the computed width is based on the width of the
         289                 :   // containing block, the margin/border/padding areas, and the min/max width.
         290                 :   nscoord          mComputedWidth;
         291                 :
         292                 :   // The computed height specifies the frame's content height, and it does
         293                 :   // not apply to inline non-replaced elements
         294                 :   //
         295                 :   // For replaced inline frames, a value of NS_INTRINSICSIZE means you should
         296                 :   // use your intrinsic height as the computed height
         297                 :   //
         298                 :   // For non-replaced block-level frames in the flow and floated, a value of
         299                 :   // NS_AUTOHEIGHT means you choose a height to shrink wrap around the normal
         300                 :   // flow child frames. The height must be within the limit of the min/max
         301                 :   // height if there is such a limit
         302                 :   //
         303                 :   // For replaced block-level frames, a value of NS_INTRINSICSIZE
         304                 :   // means you use your intrinsic height as the computed height
         305                 :   nscoord          mComputedHeight;
         306                 :
         307                 : public:
         308                 :   // Computed values for 'left/top/right/bottom' offsets. Only applies to
         309                 :   // 'positioned' elements
         310                 :   nsMargin         mComputedOffsets;
         311                 :
         312                 :   // Computed values for 'min-width/max-width' and 'min-height/max-height'
         313                 :   // XXXldb The width ones here should go; they should be needed only
         314                 :   // internally.
         315                 :   nscoord          mComputedMinWidth, mComputedMaxWidth;
         316                 :   nscoord          mComputedMinHeight, mComputedMaxHeight;
         317                 :
         318                 :   // Cached pointers to the various style structs used during intialization
         319                 :   const nsStyleDisplay*    mStyleDisplay;
         320                 :   const nsStyleVisibility* mStyleVisibility;
         321                 :   const nsStylePosition*   mStylePosition;
         322                 :   const nsStyleBorder*     mStyleBorder;
         323                 :   const nsStyleMargin*     mStyleMargin;
         324                 :   const nsStylePadding*    mStylePadding;
         325                 :   const nsStyleText*       mStyleText;
         326                 :
         327                 :   // a frame (e.g. nsTableCellFrame) which may need to generate a special
         328                 :   // reflow for percent height calculations
         329                 :   nsIPercentHeightObserver* mPercentHeightObserver;
         330                 :
         331                 :   // CSS margin collapsing sometimes requires us to reflow
         332                 :   // optimistically assuming that margins collapse to see if clearance
         333                 :   // is required. When we discover that clearance is required, we
         334                 :   // store the frame in which clearance was discovered to the location
         335                 :   // requested here.
         336                 :   nsIFrame** mDiscoveredClearance;
         337                 :
         338                 :   // This value keeps track of how deeply nested a given reflow state
         339                 :   // is from the top of the frame tree.
         340                 :   PRInt16 mReflowDepth;
         341                 :
         342                 :   struct ReflowStateFlags {
         343                 :     PRUint16 mSpecialHeightReflow:1; // used by tables to communicate special reflow (in process) to handle
         344                 :                                      // percent height frames inside cells which may not have computed heights
         345                 :     PRUint16 mNextInFlowUntouched:1; // nothing in the frame's next-in-flow (or its descendants)
         346                 :                                      // is changing
         347                 :     PRUint16 mIsTopOfPage:1;         // Is the current context at the top of a
         348                 :                                      // page?  When true, we force something
         349                 :                                      // that's too tall for a page/column to
         350                 :                                      // fit anyway to avoid infinite loops.
         351                 :     PRUint16 mBlinks:1;              // Keep track of text-decoration: blink
         352                 :     PRUint16 mHasClearance:1;        // Block has clearance
         353                 :     PRUint16 mAssumingHScrollbar:1;  // parent frame is an nsIScrollableFrame and it
         354                 :                                      // is assuming a horizontal scrollbar
         355                 :     PRUint16 mAssumingVScrollbar:1;  // parent frame is an nsIScrollableFrame and it
         356                 :                                      // is assuming a vertical scrollbar
         357                 :
         358                 :     PRUint16 mHResize:1;             // Is frame (a) not dirty and (b) a
         359                 :                                      // different width than before?
         360                 :
         361                 :     PRUint16 mVResize:1;             // Is frame (a) not dirty and (b) a
         362                 :                                      // different height than before or
         363                 :                                      // (potentially) in a context where
         364                 :                                      // percent heights have a different
         365                 :                                      // basis?
         366                 :     PRUint16 mTableIsSplittable:1;   // tables are splittable, this should happen only inside a page
         367                 :                                      // and never insider a column frame
         368                 :     PRUint16 mHeightDependsOnAncestorCell:1;   // Does frame height depend on
         369                 :                                                // an ancestor table-cell?
         370                 :     PRUint16 mIsColumnBalancing:1;   // nsColumnSetFrame is balancing columns
         371                 :   } mFlags;
         372                 :
         373                 : private:
         374                 :
         375                 :   mozilla::AutoRestore<nsIFrame*> mRestoreCurrentInflationContainer;
         376                 :   mozilla::AutoRestore<nscoord> mRestoreCurrentInflationContainerWidth;
         377                 :
         378                 : public:
         379                 :   // Note: The copy constructor is written by the compiler automatically. You
         380                 :   // can use that and then override specific values if you want, or you can
         381                 :   // call Init as desired...
         382                 :
         383                 :   // Initialize a <b>root</b> reflow state with a rendering context to
         384                 :   // use for measuring things.
         385                 :   nsHTMLReflowState(nsPresContext*           aPresContext,
         386                 :                     nsIFrame*                aFrame,
         387                 :                     nsRenderingContext*     aRenderingContext,
         388                 :                     const nsSize&            aAvailableSpace);
         389                 :
         390                 :   // Initialize a reflow state for a child frames reflow. Some state
         391                 :   // is copied from the parent reflow state; the remaining state is
         392                 :   // computed.
         393                 :   nsHTMLReflowState(nsPresContext*           aPresContext,
         394                 :                     const nsHTMLReflowState& aParentReflowState,
         395                 :                     nsIFrame*                aFrame,
         396                 :                     const nsSize&            aAvailableSpace,
         397                 :                     // These two are used by absolute positioning code
         398                 :                     // to override default containing block w & h:
         399                 :                     nscoord                  aContainingBlockWidth = -1,
         400                 :                     nscoord                  aContainingBlockHeight = -1,
         401                 :                     bool                     aInit = true);
         402                 :
         403                 :   // This method initializes various data members. It is automatically
         404                 :   // called by the various constructors
         405                 :   void Init(nsPresContext* aPresContext,
         406                 :             nscoord         aContainingBlockWidth = -1,
         407                 :             nscoord         aContainingBlockHeight = -1,
         408                 :             const nsMargin* aBorder = nsnull,
         409                 :             const nsMargin* aPadding = nsnull);
         410                 :   /**
         411                 :    * Find the content width of the containing block of aReflowState
         412                 :    */
         413                 :   static nscoord
         414                 :     GetContainingBlockContentWidth(const nsHTMLReflowState* aReflowState);
         415                 :
         416                 :   /**
         417                 :    * Calculate the used line-height property. The return value will be >= 0.
         418                 :    */
         419                 :   nscoord CalcLineHeight() const;
         420                 :
         421                 :   /**
         422                 :    * Same as CalcLineHeight() above, but doesn't need a reflow state.
         423                 :    *
         424                 :    * @param aBlockHeight The computed height of the content rect of the block
         425                 :    *                     that the line should fill.
         426                 :    *                     Only used with line-height:-moz-block-height.
         427                 :    *                     NS_AUTOHEIGHT results in a normal line-height for
         428                 :    *                     line-height:-moz-block-height.
         429                 :    * @param aFontSizeInflation The result of the appropriate
         430                 :    *                           nsLayoutUtils::FontSizeInflationFor call,
         431                 :    *                           or 1.0 if during intrinsic size
         432                 :    *                           calculation.
         433                 :    */
         434                 :   static nscoord CalcLineHeight(nsStyleContext* aStyleContext,
         435                 :                                 nscoord aBlockHeight,
         436                 :                                 float aFontSizeInflation);
         437                 :
         438                 :
         439                 :   void ComputeContainingBlockRectangle(nsPresContext*          aPresContext,
         440                 :                                        const nsHTMLReflowState* aContainingBlockRS,
         441                 :                                        nscoord&                 aContainingBlockWidth,
         442                 :                                        nscoord&                 aContainingBlockHeight);
         443                 :
         444                 :   /**
         445                 :    * Apply the mComputed(Min/Max)(Width/Height) values to the content
         446                 :    * size computed so far. If a passed-in pointer is null, we skip
         447                 :    * adjusting that dimension.
         448                 :    */
         449                 :   void ApplyMinMaxConstraints(nscoord* aContentWidth, nscoord* aContentHeight) const;
         450                 :
         451               0 :   bool ShouldReflowAllKids() const {
         452                 :     // Note that we could make a stronger optimization for mVResize if
         453                 :     // we use it in a ShouldReflowChild test that replaces the current
         454                 :     // checks of NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN, if it
         455                 :     // were tested there along with NS_FRAME_CONTAINS_RELATIVE_HEIGHT.
         456                 :     // This would need to be combined with a slight change in which
         457                 :     // frames NS_FRAME_CONTAINS_RELATIVE_HEIGHT is marked on.
         458               0 :     return (frame->GetStateBits() & NS_FRAME_IS_DIRTY) ||
         459                 :            mFlags.mHResize ||
         460                 :            (mFlags.mVResize &&
         461               0 :             (frame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT));
         462                 :   }
         463                 :
         464               0 :   nscoord ComputedWidth() const { return mComputedWidth; }
         465                 :   // This method doesn't apply min/max computed widths to the value passed in.
         466                 :   void SetComputedWidth(nscoord aComputedWidth);
         467                 :
         468               0 :   nscoord ComputedHeight() const { return mComputedHeight; }
         469                 :   // This method doesn't apply min/max computed heights to the value passed in.
         470                 :   void SetComputedHeight(nscoord aComputedHeight);
         471                 :
         472               0 :   void SetComputedHeightWithoutResettingResizeFlags(nscoord aComputedHeight) {
         473                 :     // Viewport frames reset the computed height on a copy of their reflow
         474                 :     // state when reflowing fixed-pos kids.  In that case we actually don't
         475                 :     // want to mess with the resize flags, because comparing the frame's rect
         476                 :     // to the munged computed width is pointless.
         477               0 :     mComputedHeight = aComputedHeight;
         478               0 :   }
         479                 :
         480                 :   void SetTruncated(const nsHTMLReflowMetrics& aMetrics, nsReflowStatus* aStatus) const;
         481                 :
         482               0 :   bool WillReflowAgainForClearance() const {
         483               0 :     return mDiscoveredClearance && *mDiscoveredClearance;
         484                 :   }
         485                 :
         486                 : #ifdef DEBUG
         487                 :   // Reflow trace methods.  Defined in nsFrame.cpp so they have access
         488                 :   // to the display-reflow infrastructure.
         489                 :   static void* DisplayInitConstraintsEnter(nsIFrame* aFrame,
         490                 :                                            nsHTMLReflowState* aState,
         491                 :                                            nscoord aCBWidth,
         492                 :                                            nscoord aCBHeight,
         493                 :                                            const nsMargin* aBorder,
         494                 :                                            const nsMargin* aPadding);
         495                 :   static void DisplayInitConstraintsExit(nsIFrame* aFrame,
         496                 :                                          nsHTMLReflowState* aState,
         497                 :                                          void* aValue);
         498                 :   static void* DisplayInitFrameTypeEnter(nsIFrame* aFrame,
         499                 :                                          nsHTMLReflowState* aState);
         500                 :   static void DisplayInitFrameTypeExit(nsIFrame* aFrame,
         501                 :                                        nsHTMLReflowState* aState,
         502                 :                                        void* aValue);
         503                 : #endif
         504                 :
         505                 : protected:
         506                 :   void InitFrameType(nsIAtom* aFrameType);
         507                 :   void InitCBReflowState();
         508                 :   void InitResizeFlags(nsPresContext* aPresContext, nsIAtom* aFrameType);
         509                 :
         510                 :   void InitConstraints(nsPresContext* aPresContext,
         511                 :                        nscoord         aContainingBlockWidth,
         512                 :                        nscoord         aContainingBlockHeight,
         513                 :                        const nsMargin* aBorder,
         514                 :                        const nsMargin* aPadding,
         515                 :                        nsIAtom*        aFrameType);
         516                 :
         517                 :   // Returns the nearest containing block or block frame (whether or not
         518                 :   // it is a containing block) for the specified frame.  Also returns
         519                 :   // the left edge and width of the containing block's content area.
         520                 :   // These are returned in the coordinate space of the containing block.
         521                 :   nsIFrame* GetHypotheticalBoxContainer(nsIFrame* aFrame,
         522                 :                                         nscoord& aCBLeftEdge,
         523                 :                                         nscoord& aCBWidth);
         524                 :
         525                 :   void CalculateHypotheticalBox(nsPresContext*    aPresContext,
         526                 :                                 nsIFrame*         aPlaceholderFrame,
         527                 :                                 nsIFrame*         aContainingBlock,
         528                 :                                 nscoord           aBlockLeftContentEdge,
         529                 :                                 nscoord           aBlockContentWidth,
         530                 :                                 const nsHTMLReflowState* cbrs,
         531                 :                                 nsHypotheticalBox& aHypotheticalBox,
         532                 :                                 nsIAtom*          aFrameType);
         533                 :
         534                 :   void InitAbsoluteConstraints(nsPresContext* aPresContext,
         535                 :                                const nsHTMLReflowState* cbrs,
         536                 :                                nscoord aContainingBlockWidth,
         537                 :                                nscoord aContainingBlockHeight,
         538                 :                                nsIAtom* aFrameType);
         539                 :
         540                 :   void ComputeRelativeOffsets(const nsHTMLReflowState* cbrs,
         541                 :                               nscoord aContainingBlockWidth,
         542                 :                               nscoord aContainingBlockHeight,
         543                 :                               nsPresContext* aPresContext);
         544                 :
         545                 :   // Calculates the computed values for the 'min-Width', 'max-Width',
         546                 :   // 'min-Height', and 'max-Height' properties, and stores them in the assorted
         547                 :   // data members
         548                 :   void ComputeMinMaxValues(nscoord                  aContainingBlockWidth,
         549                 :                            nscoord                  aContainingBlockHeight,
         550                 :                            const nsHTMLReflowState* aContainingBlockRS);
         551                 :
         552                 :   void CalculateHorizBorderPaddingMargin(nscoord aContainingBlockWidth,
         553                 :                                          nscoord* aInsideBoxSizing,
         554                 :                                          nscoord* aOutsideBoxSizing);
         555                 :
         556                 :   void CalculateBlockSideMargins(nscoord aAvailWidth,
         557                 :                                  nscoord aComputedWidth,
         558                 :                                  nsIAtom* aFrameType);
         559                 : };
         560                 :
         561                 : #endif /* nsHTMLReflowState_h___ */
         562                 :

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