The Tor Browser: layout/tables/nsTableRowFrame.h@97036ab72558 (annotated)

layout/tables/nsTableRowFrame.h@97036ab72558 (annotated)

layout/tables/nsTableRowFrame.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef nsTableRowFrame_h__
 #define nsTableRowFrame_h__
 #include "mozilla/Attributes.h"
 #include "nscore.h"
 #include "nsContainerFrame.h"
 #include "nsTablePainter.h"
 class  nsTableFrame;
 class  nsTableCellFrame;
 struct nsTableCellReflowState;
 /**
  * nsTableRowFrame is the frame that maps table rows
  * (HTML tag TR). This class cannot be reused
  * outside of an nsTableRowGroupFrame.  It assumes that its parent is an nsTableRowGroupFrame,
  * and its children are nsTableCellFrames.
  *
  * @see nsTableFrame
  * @see nsTableRowGroupFrame
  * @see nsTableCellFrame
  */
 class nsTableRowFrame : public nsContainerFrame
 {
 public:
   NS_DECL_QUERYFRAME_TARGET(nsTableRowFrame)
   NS_DECL_QUERYFRAME
   NS_DECL_FRAMEARENA_HELPERS
   virtual ~nsTableRowFrame();
   virtual void Init(nsIContent*      aContent,
                     nsIFrame*        aParent,
                     nsIFrame*        aPrevInFlow) MOZ_OVERRIDE;
   virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
   /** @see nsIFrame::DidSetStyleContext */
   virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
   virtual nsresult AppendFrames(ChildListID     aListID,
                                 nsFrameList&    aFrameList) MOZ_OVERRIDE;
   virtual nsresult InsertFrames(ChildListID     aListID,
                                 nsIFrame*       aPrevFrame,
                                 nsFrameList&    aFrameList) MOZ_OVERRIDE;
   virtual nsresult RemoveFrame(ChildListID     aListID,
                                nsIFrame*       aOldFrame) MOZ_OVERRIDE;
   /** instantiate a new instance of nsTableRowFrame.
     * @param aPresShell the pres shell for this frame
     *
     * @return           the frame that was created
     */
   friend nsIFrame* NS_NewTableRowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
   virtual nsMargin GetUsedMargin() const MOZ_OVERRIDE;
   virtual nsMargin GetUsedBorder() const MOZ_OVERRIDE;
   virtual nsMargin GetUsedPadding() const MOZ_OVERRIDE;
   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                 const nsRect&           aDirtyRect,
                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
   nsTableCellFrame* GetFirstCell() ;
   /** calls Reflow for all of its child cells.
     * Cells with rowspan=1 are all set to the same height and stacked horizontally.
     * <P> Cells are not split unless absolutely necessary.
     * <P> Cells are resized in nsTableFrame::BalanceColumnWidths
     * and nsTableFrame::ShrinkWrapChildren
     *
     * @param aDesiredSize width set to width of the sum of the cells, height set to
     *                     height of cells with rowspan=1.
     *
     * @see nsIFrame::Reflow
     * @see nsTableFrame::BalanceColumnWidths
     * @see nsTableFrame::ShrinkWrapChildren
     */
   virtual nsresult Reflow(nsPresContext*          aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsReflowStatus&          aStatus) MOZ_OVERRIDE;
   void DidResize();
   /**
    * Get the "type" of the frame
    *
    * @see nsGkAtoms::tableRowFrame
    */
   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
 #ifdef DEBUG_FRAME_DUMP
   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
 #endif
   void UpdateHeight(nscoord           aHeight,
                     nscoord           aAscent,
                     nscoord           aDescent,
                     nsTableFrame*     aTableFrame = nullptr,
                     nsTableCellFrame* aCellFrame  = nullptr);
   void ResetHeight(nscoord aRowStyleHeight);
   // calculate the height, considering content height of the
   // cells and the style height of the row and cells, excluding pct heights
   nscoord CalcHeight(const nsHTMLReflowState& aReflowState);
   // Support for cells with 'vertical-align: baseline'.
   /**
    * returns the max-ascent amongst all the cells that have
    * 'vertical-align: baseline', *including* cells with rowspans.
    * returns 0 if we don't have any cell with 'vertical-align: baseline'
    */
   nscoord GetMaxCellAscent() const;
   /* return the row ascent
    */
   nscoord GetRowBaseline();
   /** returns the ordinal position of this row in its table */
   virtual int32_t GetRowIndex() const;
   /** set this row's starting row index */
   void SetRowIndex (int aRowIndex);
   /** used by row group frame code */
   nscoord ReflowCellFrame(nsPresContext*          aPresContext,
                           const nsHTMLReflowState& aReflowState,
                           bool                     aIsTopOfPage,
                           nsTableCellFrame*        aCellFrame,
                           nscoord                  aAvailableHeight,
                           nsReflowStatus&          aStatus);
   /**
     * Collapse the row if required, apply col and colgroup visibility: collapse
     * info to the cells in the row.
     * @return he amount to shift up all following rows
     * @param aRowOffset     - shift the row up by this amount
     * @param aWidth         - new width of the row
     * @param aCollapseGroup - parent rowgroup is collapsed so this row needs
     *                         to be collapsed
     * @param aDidCollapse   - the row has been collapsed
     */
   nscoord CollapseRowIfNecessary(nscoord aRowOffset,
                                  nscoord aWidth,
                                  bool    aCollapseGroup,
                                  bool& aDidCollapse);
   /**
    * Insert a cell frame after the last cell frame that has a col index
    * that is less than aColIndex.  If no such cell frame is found the
    * frame to insert is prepended to the child list.
    * @param aFrame the cell frame to insert
    * @param aColIndex the col index
    */
   void InsertCellFrame(nsTableCellFrame* aFrame,
                        int32_t           aColIndex);
   nsresult CalculateCellActualHeight(nsTableCellFrame* aCellFrame,
                                      nscoord&          aDesiredHeight);
   bool IsFirstInserted() const;
   void   SetFirstInserted(bool aValue);
   nscoord GetContentHeight() const;
   void    SetContentHeight(nscoord aTwipValue);
   bool HasStyleHeight() const;
   bool HasFixedHeight() const;
   void   SetHasFixedHeight(bool aValue);
   bool HasPctHeight() const;
   void   SetHasPctHeight(bool aValue);
   nscoord GetFixedHeight() const;
   void    SetFixedHeight(nscoord aValue);
   float   GetPctHeight() const;
   void    SetPctHeight(float  aPctValue,
                        bool aForce = false);
   nscoord GetHeight(nscoord aBasis = 0) const;
   nsTableRowFrame* GetNextRow() const;
   bool    HasUnpaginatedHeight();
   void    SetHasUnpaginatedHeight(bool aValue);
   nscoord GetUnpaginatedHeight(nsPresContext* aPresContext);
   void    SetUnpaginatedHeight(nsPresContext* aPresContext, nscoord aValue);
   nscoord GetTopBCBorderWidth();
   void    SetTopBCBorderWidth(BCPixelSize aWidth);
   nscoord GetBottomBCBorderWidth();
   void    SetBottomBCBorderWidth(BCPixelSize aWidth);
   nsMargin* GetBCBorderWidth(nsMargin& aBorder);
   /**
    * Gets inner border widths before collapsing with cell borders
    * Caller must get bottom border from next row or from table
    * GetContinuousBCBorderWidth will not overwrite aBorder.bottom
    * see nsTablePainter about continuous borders
    */
   void GetContinuousBCBorderWidth(nsMargin& aBorder);
   /**
    * @returns outer top bc border == prev row's bottom inner
    */
   nscoord GetOuterTopContBCBorderWidth();
   /**
    * Sets full border widths before collapsing with cell borders
    * @param aForSide - side to set; only accepts right, left, and top
    */
   void SetContinuousBCBorderWidth(uint8_t     aForSide,
                                   BCPixelSize aPixelValue);
   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
   {
     return nsContainerFrame::IsFrameOfType(aFlags & ~(nsIFrame::eTablePart));
   }
   virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
   virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
   virtual void InvalidateFrameForRemoval() MOZ_OVERRIDE { InvalidateFrameSubtree(); }
 #ifdef ACCESSIBILITY
   virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
 #endif
 protected:
   /** protected constructor.
     * @see NewFrame
     */
   nsTableRowFrame(nsStyleContext *aContext);
   void InitChildReflowState(nsPresContext&         aPresContext,
                             const nsSize&           aAvailSize,
                             bool                    aBorderCollapse,
                             nsTableCellReflowState& aReflowState);
   virtual int GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
   // row-specific methods
   nscoord ComputeCellXOffset(const nsHTMLReflowState& aState,
                              nsIFrame*                aKidFrame,
                              const nsMargin&          aKidMargin) const;
   /**
    * Called for incremental/dirty and resize reflows. If aDirtyOnly is true then
    * only reflow dirty cells.
    */
   nsresult ReflowChildren(nsPresContext*           aPresContext,
                           nsHTMLReflowMetrics&     aDesiredSize,
                           const nsHTMLReflowState& aReflowState,
                           nsTableFrame&            aTableFrame,
                           nsReflowStatus&          aStatus);
 private:
   struct RowBits {
     unsigned mRowIndex:29;
     unsigned mHasFixedHeight:1; // set if the dominating style height on the row or any cell is pixel based
     unsigned mHasPctHeight:1;   // set if the dominating style height on the row or any cell is pct based
     unsigned mFirstInserted:1;  // if true, then it was the top most newly inserted row
   } mBits;
   // the desired height based on the content of the tallest cell in the row
   nscoord mContentHeight;
   // the height based on a style percentage height on either the row or any cell
   // if mHasPctHeight is set
   nscoord mStylePctHeight;
   // the height based on a style pixel height on the row or any
   // cell if mHasFixedHeight is set
   nscoord mStyleFixedHeight;
   // max-ascent and max-descent amongst all cells that have 'vertical-align: baseline'
   nscoord mMaxCellAscent;  // does include cells with rowspan > 1
   nscoord mMaxCellDescent; // does *not* include cells with rowspan > 1
   // border widths in pixels in the collapsing border model of the *inner*
   // half of the border only
   BCPixelSize mTopBorderWidth;
   BCPixelSize mBottomBorderWidth;
   BCPixelSize mRightContBorderWidth;
   BCPixelSize mTopContBorderWidth;
   BCPixelSize mLeftContBorderWidth;
   /**
    * Sets the NS_ROW_HAS_CELL_WITH_STYLE_HEIGHT bit to indicate whether
    * this row has any cells that have non-auto-height.  (Row-spanning
    * cells are ignored.)
    */
   void InitHasCellWithStyleHeight(nsTableFrame* aTableFrame);
 };
 inline int32_t nsTableRowFrame::GetRowIndex() const
 {
   return int32_t(mBits.mRowIndex);
 }
 inline void nsTableRowFrame::SetRowIndex (int aRowIndex)
 {
   mBits.mRowIndex = aRowIndex;
 }
 inline bool nsTableRowFrame::IsFirstInserted() const
 {
   return bool(mBits.mFirstInserted);
 }
 inline void nsTableRowFrame::SetFirstInserted(bool aValue)
 {
   mBits.mFirstInserted = aValue;
 }
 inline bool nsTableRowFrame::HasStyleHeight() const
 {
   return (bool)mBits.mHasFixedHeight || (bool)mBits.mHasPctHeight;
 }
 inline bool nsTableRowFrame::HasFixedHeight() const
 {
   return (bool)mBits.mHasFixedHeight;
 }
 inline void nsTableRowFrame::SetHasFixedHeight(bool aValue)
 {
   mBits.mHasFixedHeight = aValue;
 }
 inline bool nsTableRowFrame::HasPctHeight() const
 {
   return (bool)mBits.mHasPctHeight;
 }
 inline void nsTableRowFrame::SetHasPctHeight(bool aValue)
 {
   mBits.mHasPctHeight = aValue;
 }
 inline nscoord nsTableRowFrame::GetContentHeight() const
 {
   return mContentHeight;
 }
 inline void nsTableRowFrame::SetContentHeight(nscoord aValue)
 {
   mContentHeight = aValue;
 }
 inline nscoord nsTableRowFrame::GetFixedHeight() const
 {
   if (mBits.mHasFixedHeight)
     return mStyleFixedHeight;
   else
     return 0;
 }
 inline float nsTableRowFrame::GetPctHeight() const
 {
   if (mBits.mHasPctHeight)
     return (float)mStylePctHeight / 100.0f;
   else
     return 0.0f;
 }
 inline bool nsTableRowFrame::HasUnpaginatedHeight()
 {
   return (mState & NS_TABLE_ROW_HAS_UNPAGINATED_HEIGHT) ==
          NS_TABLE_ROW_HAS_UNPAGINATED_HEIGHT;
 }
 inline void nsTableRowFrame::SetHasUnpaginatedHeight(bool aValue)
 {
   if (aValue) {
     mState |= NS_TABLE_ROW_HAS_UNPAGINATED_HEIGHT;
   } else {
     mState &= ~NS_TABLE_ROW_HAS_UNPAGINATED_HEIGHT;
   }
 }
 inline nscoord nsTableRowFrame::GetTopBCBorderWidth()
 {
   return mTopBorderWidth;
 }
 inline void nsTableRowFrame::SetTopBCBorderWidth(BCPixelSize aWidth)
 {
   mTopBorderWidth = aWidth;
 }
 inline nscoord nsTableRowFrame::GetBottomBCBorderWidth()
 {
   return mBottomBorderWidth;
 }
 inline void nsTableRowFrame::SetBottomBCBorderWidth(BCPixelSize aWidth)
 {
   mBottomBorderWidth = aWidth;
 }
 inline nsMargin* nsTableRowFrame::GetBCBorderWidth(nsMargin& aBorder)
 {
   aBorder.left = aBorder.right = 0;
   aBorder.top    = nsPresContext::CSSPixelsToAppUnits(mTopBorderWidth);
   aBorder.bottom = nsPresContext::CSSPixelsToAppUnits(mBottomBorderWidth);
   return &aBorder;
 }
 inline void
 nsTableRowFrame::GetContinuousBCBorderWidth(nsMargin& aBorder)
 {
   int32_t aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
   aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips,
                                             mLeftContBorderWidth);
   aBorder.top = BC_BORDER_BOTTOM_HALF_COORD(aPixelsToTwips,
                                             mTopContBorderWidth);
   aBorder.left = BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips,
                                             mRightContBorderWidth);
 }
 inline nscoord nsTableRowFrame::GetOuterTopContBCBorderWidth()
 {
   int32_t aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
   return BC_BORDER_TOP_HALF_COORD(aPixelsToTwips, mTopContBorderWidth);
 }
 #endif

The Tor Browser / annotate

layout/tables/nsTableRowFrame.h@97036ab72558 (annotated)

layout/tables/nsTableRowFrame.h