1 files changed, 357 insertions, 0 deletions
diff --git a/layout/tables/nsTableCellFrame.h b/layout/tables/nsTableCellFrame.h
new file mode 100644
index 000000000..6717e1b70
--- /dev/null
+++ b/layout/tables/nsTableCellFrame.h
@@ -0,0 +1,357 @@
+/* -*- 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 nsTableCellFrame_h__
+#define nsTableCellFrame_h__
+
+#include "mozilla/Attributes.h"
+#include "celldata.h"
+#include "imgIContainer.h"
+#include "nsITableCellLayout.h"
+#include "nscore.h"
+#include "nsContainerFrame.h"
+#include "nsStyleContext.h"
+#include "nsIPercentBSizeObserver.h"
+#include "nsGkAtoms.h"
+#include "nsLayoutUtils.h"
+#include "nsTArray.h"
+#include "nsTableRowFrame.h"
+#include "mozilla/WritingModes.h"
+
+/**
+ * nsTableCellFrame
+ * data structure to maintain information about a single table cell's frame
+ *
+ * NOTE:  frames are not ref counted.  We expose addref and release here
+ * so we can change that decsion in the future.  Users of nsITableCellLayout
+ * should refcount correctly as if this object is being ref counted, though
+ * no actual support is under the hood.
+ *
+ * @author  sclark
+ */
+class nsTableCellFrame : public nsContainerFrame,
+                         public nsITableCellLayout,
+                         public nsIPercentBSizeObserver
+{
+  typedef mozilla::gfx::DrawTarget DrawTarget;
+  typedef mozilla::image::DrawResult DrawResult;
+
+protected:
+  typedef mozilla::WritingMode WritingMode;
+  typedef mozilla::LogicalSide LogicalSide;
+  typedef mozilla::LogicalMargin LogicalMargin;
+
+public:
+  NS_DECL_QUERYFRAME_TARGET(nsTableCellFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+  // default constructor supplied by the compiler
+
+  nsTableCellFrame(nsStyleContext* aContext, nsTableFrame* aTableFrame);
+  ~nsTableCellFrame();
+
+  nsTableRowFrame* GetTableRowFrame() const
+  {
+    nsIFrame* parent = GetParent();
+    MOZ_ASSERT(parent && parent->GetType() == nsGkAtoms::tableRowFrame);
+    return static_cast<nsTableRowFrame*>(parent);
+  }
+
+  nsTableFrame* GetTableFrame() const
+  {
+    return GetTableRowFrame()->GetTableFrame();
+  }
+
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+
+  virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+#ifdef ACCESSIBILITY
+  virtual mozilla::a11y::AccType AccessibleType() override;
+#endif
+
+  virtual nsresult  AttributeChanged(int32_t         aNameSpaceID,
+                                     nsIAtom*        aAttribute,
+                                     int32_t         aModType) override;
+
+  /** @see nsIFrame::DidSetStyleContext */
+  virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
+
+#ifdef DEBUG
+  // Our anonymous block frame is the content insertion frame so these
+  // methods should never be called:
+  virtual void AppendFrames(ChildListID     aListID,
+                            nsFrameList&    aFrameList) override;
+  virtual void InsertFrames(ChildListID     aListID,
+                            nsIFrame*       aPrevFrame,
+                            nsFrameList&    aFrameList) override;
+  virtual void RemoveFrame(ChildListID     aListID,
+                           nsIFrame*       aOldFrame) override;
+#endif
+
+  virtual nsContainerFrame* GetContentInsertionFrame() override {
+    return PrincipalChildList().FirstChild()->GetContentInsertionFrame();
+  }
+
+  virtual nsMargin GetUsedMargin() const override;
+
+  virtual void NotifyPercentBSize(const ReflowInput& aReflowInput) override;
+
+  virtual bool NeedsToObserve(const ReflowInput& aReflowInput) override;
+
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override;
+
+  DrawResult PaintCellBackground(nsRenderingContext& aRenderingContext,
+                                 const nsRect& aDirtyRect, nsPoint aPt,
+                                 uint32_t aFlags);
+
+ 
+  virtual nsresult ProcessBorders(nsTableFrame* aFrame,
+                                  nsDisplayListBuilder* aBuilder,
+                                  const nsDisplayListSet& aLists);
+
+  virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
+  virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
+  virtual IntrinsicISizeOffsetData IntrinsicISizeOffsets() override;
+
+  virtual void Reflow(nsPresContext*      aPresContext,
+                      ReflowOutput& aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus&      aStatus) override;
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsLayoutAtoms::tableCellFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+
+  // Although the spec doesn't say that writing-mode is not applied to
+  // table-cells, we still override this method here because we want to
+  // make effective writing mode of table structure frames consistent
+  // within a table. The content inside table cells is reflowed by an
+  // anonymous block, hence their writing mode is not affected.
+  virtual mozilla::WritingMode GetWritingMode() const override
+    { return GetTableFrame()->GetWritingMode(); }
+
+  void BlockDirAlignChild(mozilla::WritingMode aWM, nscoord aMaxAscent);
+
+  /*
+   * Get the value of vertical-align adjusted for CSS 2's rules for a
+   * table cell, which means the result is always
+   * NS_STYLE_VERTICAL_ALIGN_{TOP,MIDDLE,BOTTOM,BASELINE}.
+   */
+  virtual uint8_t GetVerticalAlign() const;
+
+  bool HasVerticalAlignBaseline() const {
+    return GetVerticalAlign() == NS_STYLE_VERTICAL_ALIGN_BASELINE;
+  }
+
+  bool CellHasVisibleContent(nscoord       aBSize,
+                             nsTableFrame* tableFrame,
+                             nsIFrame*     kidFrame);
+
+  /**
+   * Get the first-line baseline of the cell relative to its block-start border
+   * edge, as if the cell were vertically aligned to the top of the row.
+   */
+  nscoord GetCellBaseline() const;
+
+  /**
+   * return the cell's specified row span. this is what was specified in the
+   * content model or in the style info, and is always >= 1.
+   * to get the effective row span (the actual value that applies), use GetEffectiveRowSpan()
+   * @see nsTableFrame::GetEffectiveRowSpan()
+   */
+  virtual int32_t GetRowSpan();
+
+  // there is no set row index because row index depends on the cell's parent row only
+
+  /*---------------- nsITableCellLayout methods ------------------------*/
+
+  /**
+   * return the cell's starting row index (starting at 0 for the first row).
+   * for continued cell frames the row index is that of the cell's first-in-flow
+   * and the column index (starting at 0 for the first column
+   */
+  NS_IMETHOD GetCellIndexes(int32_t &aRowIndex, int32_t &aColIndex) override;
+
+  /** return the mapped cell's row index (starting at 0 for the first row) */
+  virtual nsresult GetRowIndex(int32_t &aRowIndex) const override;
+
+  /**
+   * return the cell's specified col span. this is what was specified in the
+   * content model or in the style info, and is always >= 1.
+   * to get the effective col span (the actual value that applies), use GetEffectiveColSpan()
+   * @see nsTableFrame::GetEffectiveColSpan()
+   */
+  virtual int32_t GetColSpan();
+
+  /** return the cell's column index (starting at 0 for the first column) */
+  virtual nsresult GetColIndex(int32_t &aColIndex) const override;
+  void SetColIndex(int32_t aColIndex);
+
+  /** return the available isize given to this frame during its last reflow */
+  inline nscoord GetPriorAvailISize();
+
+  /** set the available isize given to this frame during its last reflow */
+  inline void SetPriorAvailISize(nscoord aPriorAvailISize);
+
+  /** return the desired size returned by this frame during its last reflow */
+  inline mozilla::LogicalSize GetDesiredSize();
+
+  /** set the desired size returned by this frame during its last reflow */
+  inline void SetDesiredSize(const ReflowOutput & aDesiredSize);
+
+  bool GetContentEmpty();
+  void SetContentEmpty(bool aContentEmpty);
+
+  bool HasPctOverBSize();
+  void SetHasPctOverBSize(bool aValue);
+
+  nsTableCellFrame* GetNextCell() const;
+
+  virtual LogicalMargin GetBorderWidth(WritingMode aWM) const;
+
+  virtual DrawResult PaintBackground(nsRenderingContext& aRenderingContext,
+                                     const nsRect&        aDirtyRect,
+                                     nsPoint              aPt,
+                                     uint32_t             aFlags);
+
+  void DecorateForSelection(DrawTarget* aDrawTarget, nsPoint aPt);
+
+  virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override;
+
+  virtual bool IsFrameOfType(uint32_t aFlags) const override
+  {
+    return nsContainerFrame::IsFrameOfType(aFlags & ~(nsIFrame::eTablePart));
+  }
+  
+  virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) override;
+  virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) override;
+  virtual void InvalidateFrameForRemoval() override { InvalidateFrameSubtree(); }
+
+protected:
+  virtual LogicalSides
+  GetLogicalSkipSides(const ReflowInput* aReflowInput = nullptr) const override;
+
+  /**
+   * GetBorderOverflow says how far the cell's own borders extend
+   * outside its own bounds.  In the separated borders model this should
+   * just be zero (as it is for most frames), but in the collapsed
+   * borders model (for which nsBCTableCellFrame overrides this virtual
+   * method), it considers the extents of the collapsed border.
+   */
+  virtual nsMargin GetBorderOverflow();
+
+  friend class nsTableRowFrame;
+
+  uint32_t     mColIndex;             // the starting column for this cell
+
+  nscoord      mPriorAvailISize;      // the avail isize during the last reflow
+  mozilla::LogicalSize mDesiredSize;  // the last desired inline and block size
+};
+
+inline nscoord nsTableCellFrame::GetPriorAvailISize()
+{ return mPriorAvailISize; }
+
+inline void nsTableCellFrame::SetPriorAvailISize(nscoord aPriorAvailISize)
+{ mPriorAvailISize = aPriorAvailISize; }
+
+inline mozilla::LogicalSize nsTableCellFrame::GetDesiredSize()
+{ return mDesiredSize; }
+
+inline void nsTableCellFrame::SetDesiredSize(const ReflowOutput & aDesiredSize)
+{
+  mozilla::WritingMode wm = aDesiredSize.GetWritingMode();
+  mDesiredSize = aDesiredSize.Size(wm).ConvertTo(GetWritingMode(), wm);
+}
+
+inline bool nsTableCellFrame::GetContentEmpty()
+{
+  return HasAnyStateBits(NS_TABLE_CELL_CONTENT_EMPTY);
+}
+
+inline void nsTableCellFrame::SetContentEmpty(bool aContentEmpty)
+{
+  if (aContentEmpty) {
+    AddStateBits(NS_TABLE_CELL_CONTENT_EMPTY);
+  } else {
+    RemoveStateBits(NS_TABLE_CELL_CONTENT_EMPTY);
+  }
+}
+
+inline bool nsTableCellFrame::HasPctOverBSize()
+{
+  return HasAnyStateBits(NS_TABLE_CELL_HAS_PCT_OVER_BSIZE);
+}
+
+inline void nsTableCellFrame::SetHasPctOverBSize(bool aValue)
+{
+  if (aValue) {
+    AddStateBits(NS_TABLE_CELL_HAS_PCT_OVER_BSIZE);
+  } else {
+    RemoveStateBits(NS_TABLE_CELL_HAS_PCT_OVER_BSIZE);
+  }
+}
+
+// nsBCTableCellFrame
+class nsBCTableCellFrame final : public nsTableCellFrame
+{
+  typedef mozilla::image::DrawResult DrawResult;
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  nsBCTableCellFrame(nsStyleContext* aContext, nsTableFrame* aTableFrame);
+
+  ~nsBCTableCellFrame();
+
+  virtual nsIAtom* GetType() const override;
+
+  virtual nsMargin GetUsedBorder() const override;
+  virtual bool GetBorderRadii(const nsSize& aFrameSize,
+                              const nsSize& aBorderArea,
+                              Sides aSkipSides,
+                              nscoord aRadii[8]) const override;
+
+  // Get the *inner half of the border only*, in twips.
+  virtual LogicalMargin GetBorderWidth(WritingMode aWM) const override;
+
+  // Get the *inner half of the border only*, in pixels.
+  BCPixelSize GetBorderWidth(LogicalSide aSide) const;
+
+  // Set the full (both halves) width of the border
+  void SetBorderWidth(LogicalSide aSide, BCPixelSize aPixelValue);
+
+  virtual nsMargin GetBorderOverflow() override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+
+  virtual DrawResult PaintBackground(nsRenderingContext& aRenderingContext,
+                                     const nsRect&        aDirtyRect,
+                                     nsPoint              aPt,
+                                     uint32_t             aFlags) override;
+
+private:
+
+  // These are the entire width of the border (the cell edge contains only
+  // the inner half, per the macros in nsTablePainter.h).
+  BCPixelSize mBStartBorder;
+  BCPixelSize mIEndBorder;
+  BCPixelSize mBEndBorder;
+  BCPixelSize mIStartBorder;
+};
+
+#endif