/* -*- 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 nsTableRowGroupFrame_h__ #define nsTableRowGroupFrame_h__ #include "mozilla/Attributes.h" #include "nscore.h" #include "nsContainerFrame.h" #include "nsIAtom.h" #include "nsILineIterator.h" #include "nsTablePainter.h" #include "nsTArray.h" class nsTableFrame; class nsTableRowFrame; class nsTableCellFrame; struct nsRowGroupReflowState { const nsHTMLReflowState& reflowState; // Our reflow state nsTableFrame* tableFrame; // The available size (computed from the parent) nsSize availSize; // Running y-offset nscoord y; nsRowGroupReflowState(const nsHTMLReflowState& aReflowState, nsTableFrame* aTableFrame) :reflowState(aReflowState), tableFrame(aTableFrame) { availSize.width = reflowState.availableWidth; availSize.height = reflowState.availableHeight; y = 0; } ~nsRowGroupReflowState() {} }; // use the following bits from nsFrame's frame state // thead or tfoot should be repeated on every printed page #define NS_ROWGROUP_REPEATABLE NS_FRAME_STATE_BIT(31) #define NS_ROWGROUP_HAS_STYLE_HEIGHT NS_FRAME_STATE_BIT(30) // the next is also used on rows (see nsTableRowGroupFrame::InitRepeatedFrame) #define NS_REPEATED_ROW_OR_ROWGROUP NS_FRAME_STATE_BIT(28) #define NS_ROWGROUP_HAS_ROW_CURSOR NS_FRAME_STATE_BIT(27) #define MIN_ROWS_NEEDING_CURSOR 20 /** * nsTableRowGroupFrame is the frame that maps row groups * (HTML tags THEAD, TFOOT, and TBODY). This class cannot be reused * outside of an nsTableFrame. It assumes that its parent is an nsTableFrame, and * its children are nsTableRowFrames. * * @see nsTableFrame * @see nsTableRowFrame */ class nsTableRowGroupFrame : public nsContainerFrame , public nsILineIterator { public: NS_DECL_QUERYFRAME_TARGET(nsTableRowGroupFrame) NS_DECL_QUERYFRAME NS_DECL_FRAMEARENA_HELPERS /** instantiate a new instance of nsTableRowFrame. * @param aPresShell the pres shell for this frame * * @return the frame that was created */ friend nsIFrame* NS_NewTableRowGroupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); virtual ~nsTableRowGroupFrame(); /** @see nsIFrame::DidSetStyleContext */ virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext); NS_IMETHOD AppendFrames(ChildListID aListID, nsFrameList& aFrameList) MOZ_OVERRIDE; NS_IMETHOD InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame, nsFrameList& aFrameList) MOZ_OVERRIDE; NS_IMETHOD RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) MOZ_OVERRIDE; virtual nsMargin GetUsedMargin() const; virtual nsMargin GetUsedBorder() const; virtual nsMargin GetUsedPadding() const; NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) MOZ_OVERRIDE; /** calls Reflow for all of its child rows. * Rows are all set to the same width and stacked vertically. *

rows are not split unless absolutely necessary. * * @param aDesiredSize width set to width of rows, height set to * sum of height of rows that fit in aMaxSize.height. * * @see nsIFrame::Reflow */ NS_IMETHOD Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus); /** * Get the "type" of the frame * * @see nsGkAtoms::tableRowGroupFrame */ virtual nsIAtom* GetType() const; nsTableRowFrame* GetFirstRow(); #ifdef DEBUG NS_IMETHOD GetFrameName(nsAString& aResult) const; #endif /** return the number of child rows (not necessarily == number of child frames) */ int32_t GetRowCount(); /** return the table-relative row index of the first row in this rowgroup. * if there are no rows, -1 is returned. */ int32_t GetStartRowIndex(); /** Adjust the row indices of all rows whose index is >= aRowIndex. * @param aRowIndex - start adjusting with this index * @param aAdjustment - shift the row index by this amount */ void AdjustRowIndices(int32_t aRowIndex, int32_t anAdjustment); /** * Used for header and footer row group frames that are repeated when * splitting a table frame. * * Performs any table specific initialization * * @param aHeaderFooterFrame the original header or footer row group frame * that was repeated */ nsresult InitRepeatedFrame(nsPresContext* aPresContext, nsTableRowGroupFrame* aHeaderFooterFrame); /** * Get the total height of all the row rects */ nscoord GetHeightBasis(const nsHTMLReflowState& aReflowState); nsMargin* GetBCBorderWidth(nsMargin& aBorder); /** * Gets inner border widths before collapsing with cell borders * Caller must get top border from previous row group or from table * GetContinuousBCBorderWidth will not overwrite aBorder.top * see nsTablePainter about continuous borders */ void GetContinuousBCBorderWidth(nsMargin& aBorder); /** * Sets full border widths before collapsing with cell borders * @param aForSide - side to set; only right, left, and bottom valid */ void SetContinuousBCBorderWidth(uint8_t aForSide, BCPixelSize aPixelValue); /** * Adjust to the effect of visibibility:collapse on the row group and * its children * @return additional shift upward that should be applied to * subsequent rowgroups due to rows and this rowgroup * being collapsed * @param aYTotalOffset the total amount that the rowgroup is shifted up * @param aWidth new width of the rowgroup */ nscoord CollapseRowGroupIfNecessary(nscoord aYTotalOffset, nscoord aWidth); // nsILineIterator methods public: virtual void DisposeLineIterator() MOZ_OVERRIDE { } // The table row is the equivalent to a line in block layout. // The nsILineIterator assumes that a line resides in a block, this role is // fullfilled by the row group. Rows in table are counted relative to the // table. The row index of row corresponds to the cellmap coordinates. The // line index with respect to a row group can be computed by substracting the // row index of the first row in the row group. /** Get the number of rows in a row group * @return the number of lines in a row group */ virtual int32_t GetNumLines() MOZ_OVERRIDE; /** @see nsILineIterator.h GetDirection * @return true if the table is rtl */ virtual bool GetDirection() MOZ_OVERRIDE; /** Return structural information about a line. * @param aLineNumber - the index of the row relative to the row group * If the line-number is invalid then * aFirstFrameOnLine will be nullptr and * aNumFramesOnLine will be zero. * @param aFirstFrameOnLine - the first cell frame that originates in row * with a rowindex that matches a line number * @param aNumFramesOnLine - return the numbers of cells originating in * this row * @param aLineBounds - rect of the row * @param aLineFlags - unused set to 0 */ NS_IMETHOD GetLine(int32_t aLineNumber, nsIFrame** aFirstFrameOnLine, int32_t* aNumFramesOnLine, nsRect& aLineBounds, uint32_t* aLineFlags) MOZ_OVERRIDE; /** Given a frame that's a child of the rowgroup, find which line its on. * @param aFrame - frame, should be a row * @param aStartLine - minimal index to return * @return row index relative to the row group if this a row * frame and the index is at least aStartLine. * -1 if the frame cannot be found. */ virtual int32_t FindLineContaining(nsIFrame* aFrame, int32_t aStartLine = 0) MOZ_OVERRIDE; /** Find the orginating cell frame on a row that is the nearest to the * coordinate X. * @param aLineNumber - the index of the row relative to the row group * @param aX - X coordinate in twips relative to the * origin of the row group * @param aFrameFound - pointer to the cellframe * @param aXIsBeforeFirstFrame - the point is before the first originating * cellframe * @param aXIsAfterLastFrame - the point is after the last originating * cellframe */ NS_IMETHOD FindFrameAt(int32_t aLineNumber, nscoord aX, nsIFrame** aFrameFound, bool* aXIsBeforeFirstFrame, bool* aXIsAfterLastFrame) MOZ_OVERRIDE; #ifdef IBMBIDI /** Check whether visual and logical order of cell frames within a line are * identical. As the layout will reorder them this is always the case * @param aLine - the index of the row relative to the table * @param aIsReordered - returns false * @param aFirstVisual - if the table is rtl first originating cell frame * @param aLastVisual - if the table is rtl last originating cell frame */ NS_IMETHOD CheckLineOrder(int32_t aLine, bool *aIsReordered, nsIFrame **aFirstVisual, nsIFrame **aLastVisual) MOZ_OVERRIDE; #endif /** Find the next originating cell frame that originates in the row. * @param aFrame - cell frame to start with, will return the next cell * originating in a row * @param aLineNumber - the index of the row relative to the table */ NS_IMETHOD GetNextSiblingOnLine(nsIFrame*& aFrame, int32_t aLineNumber) MOZ_OVERRIDE; // row cursor methods to speed up searching for the row(s) // containing a point. The basic idea is that we set the cursor // property if the rows' y and yMosts are non-decreasing (considering only // rows with nonempty overflowAreas --- empty overflowAreas never participate // in event handling or painting), and the rowgroup has sufficient number of // rows. The cursor property points to a "recently used" row. If we get a // series of requests that work on rows "near" the cursor, then we can find // those nearby rows quickly by starting our search at the cursor. // This code is based on the line cursor code in nsBlockFrame. It's more general // though, and could be extracted and used elsewhere. struct FrameCursorData { nsTArray mFrames; uint32_t mCursorIndex; nscoord mOverflowAbove; nscoord mOverflowBelow; FrameCursorData() : mFrames(MIN_ROWS_NEEDING_CURSOR), mCursorIndex(0), mOverflowAbove(0), mOverflowBelow(0) {} bool AppendFrame(nsIFrame* aFrame); void FinishBuildingCursor() { mFrames.Compact(); } }; // Clear out row cursor because we're disturbing the rows (e.g., Reflow) void ClearRowCursor(); /** * Get the first row that might contain y-coord 'aY', or nullptr if you must search * all rows. * The actual row returned might not contain 'aY', but if not, it is guaranteed * to be before any row which does contain 'aY'. * aOverflowAbove is the maximum over all rows of -row.GetOverflowRect().y. * To find all rows that intersect the vertical interval aY/aYMost, call * GetFirstRowContaining(aY, &overflowAbove), and then iterate through all * rows until reaching a row where row->GetRect().y - overflowAbove >= aYMost. * That row and all subsequent rows cannot intersect the interval. */ nsIFrame* GetFirstRowContaining(nscoord aY, nscoord* aOverflowAbove); /** * Set up the row cursor. After this, call AppendFrame for every * child frame in sibling order. Ensure that the child frame y and YMost values * form non-decreasing sequences (should always be true for table rows); * if this is violated, call ClearRowCursor(). If we return nullptr, then we * decided not to use a cursor or we already have one set up. */ FrameCursorData* SetupRowCursor(); virtual nsILineIterator* GetLineIterator() { return this; } protected: nsTableRowGroupFrame(nsStyleContext* aContext); void InitChildReflowState(nsPresContext& aPresContext, bool aBorderCollapse, nsHTMLReflowState& aReflowState); /** implement abstract method on nsContainerFrame */ virtual int GetSkipSides() const; void PlaceChild(nsPresContext* aPresContext, nsRowGroupReflowState& aReflowState, nsIFrame* aKidFrame, nsHTMLReflowMetrics& aDesiredSize, const nsRect& aOriginalKidRect, const nsRect& aOriginalKidVisualOverflow); void CalculateRowHeights(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState); void DidResizeRows(nsHTMLReflowMetrics& aDesiredSize); void SlideChild(nsRowGroupReflowState& aReflowState, nsIFrame* aKidFrame); /** * Reflow the frames we've already created * * @param aPresContext presentation context to use * @param aReflowState current inline state * @return true if we successfully reflowed all the mapped children and false * otherwise, e.g. we pushed children to the next in flow */ nsresult ReflowChildren(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, nsRowGroupReflowState& aReflowState, nsReflowStatus& aStatus, bool* aPageBreakBeforeEnd = nullptr); nsresult SplitRowGroup(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsTableFrame* aTableFrame, nsReflowStatus& aStatus); void SplitSpanningCells(nsPresContext& aPresContext, const nsHTMLReflowState& aReflowState, nsTableFrame& aTableFrame, nsTableRowFrame& aFirstRow, nsTableRowFrame& aLastRow, bool aFirstRowIsTopOfPage, nscoord aSpanningRowBottom, nsTableRowFrame*& aContRowFrame, nsTableRowFrame*& aFirstTruncatedRow, nscoord& aDesiredHeight); void CreateContinuingRowFrame(nsPresContext& aPresContext, nsIFrame& aRowFrame, nsIFrame** aContRowFrame); bool IsSimpleRowFrame(nsTableFrame* aTableFrame, nsIFrame* aFrame); void GetNextRowSibling(nsIFrame** aRowFrame); void UndoContinuedRow(nsPresContext* aPresContext, nsTableRowFrame* aRow); private: // border widths in pixels in the collapsing border model BCPixelSize mRightContBorderWidth; BCPixelSize mBottomContBorderWidth; BCPixelSize mLeftContBorderWidth; public: bool IsRepeatable() const; void SetRepeatable(bool aRepeatable); bool HasStyleHeight() const; void SetHasStyleHeight(bool aValue); bool HasInternalBreakBefore() const; bool HasInternalBreakAfter() const; }; inline bool nsTableRowGroupFrame::IsRepeatable() const { return (mState & NS_ROWGROUP_REPEATABLE) == NS_ROWGROUP_REPEATABLE; } inline void nsTableRowGroupFrame::SetRepeatable(bool aRepeatable) { if (aRepeatable) { mState |= NS_ROWGROUP_REPEATABLE; } else { mState &= ~NS_ROWGROUP_REPEATABLE; } } inline bool nsTableRowGroupFrame::HasStyleHeight() const { return (mState & NS_ROWGROUP_HAS_STYLE_HEIGHT) == NS_ROWGROUP_HAS_STYLE_HEIGHT; } inline void nsTableRowGroupFrame::SetHasStyleHeight(bool aValue) { if (aValue) { mState |= NS_ROWGROUP_HAS_STYLE_HEIGHT; } else { mState &= ~NS_ROWGROUP_HAS_STYLE_HEIGHT; } } inline void nsTableRowGroupFrame::GetContinuousBCBorderWidth(nsMargin& aBorder) { int32_t aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel(); aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips, mRightContBorderWidth); aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips, mBottomContBorderWidth); aBorder.left = BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips, mLeftContBorderWidth); return; } #endif