Add m-esr52 at 52.6.0

1 files changed, 459 insertions, 0 deletions

diff --git a/layout/tables/celldata.h b/layout/tables/celldata.h
new file mode 100644
index 000000000..b744b5175
--- /dev/null
+++ b/layout/tables/celldata.h
@@ -0,0 +1,459 @@
+/* -*- 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 CellData_h__
+#define CellData_h__
+
+#include "nsISupports.h"
+#include "nsCoord.h"
+#include "mozilla/gfx/Types.h"
+#include "mozilla/WritingModes.h"
+#include <stdint.h>
+
+class nsTableCellFrame;
+class nsCellMap;
+class BCCellData;
+
+
+#define MAX_ROWSPAN 65534 // the cellmap can not handle more.
+#define MAX_COLSPAN 1000 // limit as IE and opera do.  If this ever changes,
+                         // change COL_SPAN_OFFSET/COL_SPAN_SHIFT accordingly.
+
+/**
+  * Data stored by nsCellMap to rationalize rowspan and colspan cells.
+  */
+class CellData
+{
+public:
+  /** Initialize the mOrigCell pointer
+    * @param aOrigCell  the table cell frame which will be stored in mOrigCell.
+    */
+  void   Init(nsTableCellFrame* aCellFrame);
+
+  /** does a cell originate from here
+    * @return    is true if a cell corresponds to this cellmap entry
+    */
+  bool IsOrig() const;
+
+  /** is the celldata valid
+    * @return    is true if no cell originates and the cell is not spanned by
+    *            a row- or colspan. mBits are 0 in this case and mOrigCell is
+    *            nullptr
+    */
+  bool IsDead() const;
+
+  /** is the entry spanned by row- or a colspan
+    * @return    is true if the entry is spanned by a row- or colspan
+    */
+  bool IsSpan() const;
+
+  /** is the entry spanned by rowspan
+    * @return    is true if the entry is spanned by a rowspan
+    */
+  bool IsRowSpan() const;
+
+  /** is the entry spanned by a zero rowspan
+    * zero rowspans span all cells starting from the originating cell down to
+    * the end of the rowgroup or a cell originating in the same column
+    * @return    is true if the entry is spanned by a zero rowspan
+    */
+  bool IsZeroRowSpan() const;
+
+  /** mark the current entry as spanned by a zero rowspan
+    * @param aIsZero    if true mark the entry as covered by a zero rowspan
+    */
+  void SetZeroRowSpan(bool aIsZero);
+
+  /** get the distance from the current entry to the corresponding origin of the rowspan
+    * @return    containing the distance in the column to the originating cell
+    */
+  uint32_t GetRowSpanOffset() const;
+
+  /** set the distance from the current entry to the corresponding origin of the rowspan
+    * @param    the distance in the column to the originating cell
+    */
+  void SetRowSpanOffset(uint32_t aSpan);
+
+  /** is the entry spanned by colspan
+    * @return    is true if the entry is spanned by a colspan
+    */
+  bool IsColSpan() const;
+
+  /** get the distance from the current entry to the corresponding origin of the colspan
+    * @return    containing the distance in the row to the originating cell
+    */
+  uint32_t GetColSpanOffset() const;
+
+  /** set the distance from the current entry to the corresponding origin of the colspan
+    * @param    the distance in the column to the originating cell
+    */
+  void SetColSpanOffset(uint32_t aSpan);
+
+  /** is the entry spanned by a row- and a colspan
+    * @return    is true if the entry is spanned by a row- and a colspan
+    */
+  bool IsOverlap() const;
+
+  /** mark the current entry as spanned by a row- and a colspan
+    * @param aOverlap    if true mark the entry as covered by a row- and a colspan
+    */
+  void SetOverlap(bool aOverlap);
+
+  /** get the table cell frame for this entry
+    * @return    a pointer to the cellframe, this will be nullptr when the entry
+    *            is only a spanned entry
+    */
+  nsTableCellFrame* GetCellFrame() const;
+
+private:
+  friend class nsCellMap;
+  friend class BCCellData;
+
+  /** constructor.
+    * @param aOrigCell  the table cell frame which will be stored in mOrigCell.
+    */
+  explicit CellData(nsTableCellFrame* aOrigCell);  // implemented in nsCellMap.cpp
+
+  /** destructor */
+  ~CellData(); // implemented in nsCellMap.cpp
+
+protected:
+
+  // this union relies on the assumption that an object (not primitive type) does
+  // not start on an odd bit boundary. If mSpan is 0 then mOrigCell is in effect
+  // and the data does not represent a span. If mSpan is 1, then mBits is in
+  // effect and the data represents a span.
+  // mBits must match the size of mOrigCell on both 32- and 64-bit platforms.
+  union {
+    nsTableCellFrame* mOrigCell;
+    uintptr_t         mBits;
+  };
+};
+
+// Border Collapsing Cell Data
+enum BCBorderOwner
+{
+  eTableOwner        =  0,
+  eColGroupOwner     =  1,
+  eAjaColGroupOwner  =  2, // col group to the left
+  eColOwner          =  3,
+  eAjaColOwner       =  4, // col to the left
+  eRowGroupOwner     =  5,
+  eAjaRowGroupOwner  =  6, // row group above
+  eRowOwner          =  7,
+  eAjaRowOwner       =  8, // row above
+  eCellOwner         =  9,
+  eAjaCellOwner      = 10  // cell to the top or to the left
+};
+
+typedef uint16_t BCPixelSize;
+
+// These are the max sizes that are stored. If they are exceeded, then the max is stored and
+// the actual value is computed when needed.
+#define MAX_BORDER_WIDTH nscoord((1u << (sizeof(BCPixelSize) * 8)) - 1)
+
+// The half of border on inline/block-axis start side
+static inline BCPixelSize
+BC_BORDER_START_HALF(BCPixelSize px) { return px - px / 2; }
+// The half of border on inline/block-axis end side
+static inline BCPixelSize
+BC_BORDER_END_HALF(BCPixelSize px) { return px / 2; }
+
+static inline nscoord
+BC_BORDER_START_HALF_COORD(int32_t p2t, BCPixelSize px)
+  { return BC_BORDER_START_HALF(px) * p2t; }
+static inline nscoord
+BC_BORDER_END_HALF_COORD(int32_t p2t, BCPixelSize px)
+  { return BC_BORDER_END_HALF(px) * p2t; }
+
+// BCData stores the bstart and istart border info and the corner connecting the two.
+class BCData
+{
+public:
+  BCData();
+
+  ~BCData();
+
+  nscoord GetIStartEdge(BCBorderOwner& aOwner,
+                        bool&          aStart) const;
+
+  void SetIStartEdge(BCBorderOwner aOwner,
+                     nscoord       aSize,
+                     bool          aStart);
+
+  nscoord GetBStartEdge(BCBorderOwner& aOwner,
+                        bool&          aStart) const;
+
+  void SetBStartEdge(BCBorderOwner aOwner,
+                     nscoord       aSize,
+                     bool          aStart);
+
+  BCPixelSize GetCorner(mozilla::LogicalSide& aCornerOwner,
+                        bool&                 aBevel) const;
+
+  void SetCorner(BCPixelSize          aSubSize,
+                 mozilla::LogicalSide aOwner,
+                 bool                 aBevel);
+
+  bool IsIStartStart() const;
+
+  void SetIStartStart(bool aValue);
+
+  bool IsBStartStart() const;
+
+  void SetBStartStart(bool aValue);
+
+
+protected:
+  BCPixelSize mIStartSize;    // size in pixels of iStart border
+  BCPixelSize mBStartSize;    // size in pixels of bStart border
+  BCPixelSize mCornerSubSize; // size of the largest border not in the
+                              //   dominant plane (for example, if corner is
+                              //   owned by the segment to its bStart or bEnd,
+                              //   then the size is the max of the border
+                              //   sizes of the segments to its iStart or iEnd.
+  unsigned mIStartOwner:   4; // owner of iStart border
+  unsigned mBStartOwner:   4; // owner of bStart border
+  unsigned mIStartStart:   1; // set if this is the start of a block-dir border segment
+  unsigned mBStartStart:   1; // set if this is the start of an inline-dir border segment
+  unsigned mCornerSide:    2; // LogicalSide of the owner of the bStart-iStart corner relative to the corner
+  unsigned mCornerBevel:   1; // is the corner beveled (only two segments, perpendicular, not dashed or dotted).
+};
+
+// BCCellData entries replace CellData entries in the cell map if the border collapsing model is in
+// effect. BCData for a row and col entry contains the left and top borders of cell at that row and
+// col and the corner connecting the two. The right borders of the cells in the last col and the bottom
+// borders of the last row are stored in separate BCData entries in the cell map.
+class BCCellData : public CellData
+{
+public:
+  explicit BCCellData(nsTableCellFrame* aOrigCell);
+  ~BCCellData();
+
+  BCData mData;
+};
+
+
+// The layout of a celldata is as follows.  The top 10 bits are the colspan
+// offset (which is enough to represent our allowed values 1-1000 for colspan).
+// Then there are two bits of flags.
+// XXXmats Then one unused bit that we should decide how to use in bug 862624.
+// Then 16 bits of rowspan offset (which
+// lets us represent numbers up to 65535.  Then another 3 bits of flags.
+
+// num bits to shift right to get right aligned col span
+#define COL_SPAN_SHIFT   22
+// num bits to shift right to get right aligned row span
+#define ROW_SPAN_SHIFT   3
+
+// the col offset to the data containing the original cell.
+#define COL_SPAN_OFFSET  (0x3FF << COL_SPAN_SHIFT)
+// the row offset to the data containing the original cell
+#define ROW_SPAN_OFFSET  (0xFFFF << ROW_SPAN_SHIFT)
+
+// And the flags
+#define SPAN             0x00000001 // there a row or col span
+#define ROW_SPAN         0x00000002 // there is a row span
+#define ROW_SPAN_0       0x00000004 // the row span is 0
+#define COL_SPAN         (1 << (COL_SPAN_SHIFT - 2)) // there is a col span
+#define OVERLAP          (1 << (COL_SPAN_SHIFT - 1)) // there is a row span and
+                                                     // col span but not by
+                                                     // same cell
+
+inline nsTableCellFrame* CellData::GetCellFrame() const
+{
+  if (SPAN != (SPAN & mBits)) {
+    return mOrigCell;
+  }
+  return nullptr;
+}
+
+inline void CellData::Init(nsTableCellFrame* aCellFrame)
+{
+  mOrigCell = aCellFrame;
+}
+
+inline bool CellData::IsOrig() const
+{
+  return ((nullptr != mOrigCell) && (SPAN != (SPAN & mBits)));
+}
+
+inline bool CellData::IsDead() const
+{
+  return (0 == mBits);
+}
+
+inline bool CellData::IsSpan() const
+{
+  return (SPAN == (SPAN & mBits));
+}
+
+inline bool CellData::IsRowSpan() const
+{
+  return (SPAN     == (SPAN & mBits)) &&
+         (ROW_SPAN == (ROW_SPAN & mBits));
+}
+
+inline bool CellData::IsZeroRowSpan() const
+{
+  return (SPAN       == (SPAN & mBits))     &&
+         (ROW_SPAN   == (ROW_SPAN & mBits)) &&
+         (ROW_SPAN_0 == (ROW_SPAN_0 & mBits));
+}
+
+inline void CellData::SetZeroRowSpan(bool aIsZeroSpan)
+{
+  if (SPAN == (SPAN & mBits)) {
+    if (aIsZeroSpan) {
+      mBits |= ROW_SPAN_0;
+    }
+    else {
+      mBits &= ~ROW_SPAN_0;
+    }
+  }
+}
+
+inline uint32_t CellData::GetRowSpanOffset() const
+{
+  if ((SPAN == (SPAN & mBits)) && ((ROW_SPAN == (ROW_SPAN & mBits)))) {
+    return (uint32_t)((mBits & ROW_SPAN_OFFSET) >> ROW_SPAN_SHIFT);
+  }
+  return 0;
+}
+
+inline void CellData::SetRowSpanOffset(uint32_t aSpan)
+{
+  mBits &= ~ROW_SPAN_OFFSET;
+  mBits |= (aSpan << ROW_SPAN_SHIFT);
+  mBits |= SPAN;
+  mBits |= ROW_SPAN;
+}
+
+inline bool CellData::IsColSpan() const
+{
+  return (SPAN     == (SPAN & mBits)) &&
+         (COL_SPAN == (COL_SPAN & mBits));
+}
+
+inline uint32_t CellData::GetColSpanOffset() const
+{
+  if ((SPAN == (SPAN & mBits)) && ((COL_SPAN == (COL_SPAN & mBits)))) {
+    return (uint32_t)((mBits & COL_SPAN_OFFSET) >> COL_SPAN_SHIFT);
+  }
+  return 0;
+}
+
+inline void CellData::SetColSpanOffset(uint32_t aSpan)
+{
+  mBits &= ~COL_SPAN_OFFSET;
+  mBits |= (aSpan << COL_SPAN_SHIFT);
+
+  mBits |= SPAN;
+  mBits |= COL_SPAN;
+}
+
+inline bool CellData::IsOverlap() const
+{
+  return (SPAN == (SPAN & mBits)) && (OVERLAP == (OVERLAP & mBits));
+}
+
+inline void CellData::SetOverlap(bool aOverlap)
+{
+  if (SPAN == (SPAN & mBits)) {
+    if (aOverlap) {
+      mBits |= OVERLAP;
+    }
+    else {
+      mBits &= ~OVERLAP;
+    }
+  }
+}
+
+inline BCData::BCData()
+{
+  mIStartOwner = mBStartOwner = eCellOwner;
+  mIStartStart = mBStartStart = 1;
+  mIStartSize = mCornerSubSize = mBStartSize = 0;
+  mCornerSide = mozilla::eLogicalSideBStart;
+  mCornerBevel = false;
+}
+
+inline BCData::~BCData()
+{
+}
+
+inline nscoord BCData::GetIStartEdge(BCBorderOwner& aOwner,
+                                     bool&          aStart) const
+{
+  aOwner = (BCBorderOwner)mIStartOwner;
+  aStart = (bool)mIStartStart;
+
+  return (nscoord)mIStartSize;
+}
+
+inline void BCData::SetIStartEdge(BCBorderOwner  aOwner,
+                                  nscoord        aSize,
+                                  bool           aStart)
+{
+  mIStartOwner = aOwner;
+  mIStartSize  = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
+  mIStartStart = aStart;
+}
+
+inline nscoord BCData::GetBStartEdge(BCBorderOwner& aOwner,
+                                     bool&          aStart) const
+{
+  aOwner = (BCBorderOwner)mBStartOwner;
+  aStart = (bool)mBStartStart;
+
+  return (nscoord)mBStartSize;
+}
+
+inline void BCData::SetBStartEdge(BCBorderOwner  aOwner,
+                                  nscoord        aSize,
+                                  bool           aStart)
+{
+  mBStartOwner = aOwner;
+  mBStartSize  = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
+  mBStartStart = aStart;
+}
+
+inline BCPixelSize BCData::GetCorner(mozilla::LogicalSide& aOwnerSide,
+                                     bool&                 aBevel) const
+{
+  aOwnerSide = mozilla::LogicalSide(mCornerSide);
+  aBevel     = (bool)mCornerBevel;
+  return mCornerSubSize;
+}
+
+inline void BCData::SetCorner(BCPixelSize          aSubSize,
+                              mozilla::LogicalSide aOwnerSide,
+                              bool                 aBevel)
+{
+  mCornerSubSize = aSubSize;
+  mCornerSide    = aOwnerSide;
+  mCornerBevel   = aBevel;
+}
+
+inline bool BCData::IsIStartStart() const
+{
+  return (bool)mIStartStart;
+}
+
+inline void BCData::SetIStartStart(bool aValue)
+{
+  mIStartStart = aValue;
+}
+
+inline bool BCData::IsBStartStart() const
+{
+  return (bool)mBStartStart;
+}
+
+inline void BCData::SetBStartStart(bool aValue)
+{
+  mBStartStart = aValue;
+}
+
+#endif