Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 400 insertions, 0 deletions

diff --git a/layout/tables/celldata.h b/layout/tables/celldata.h
new file mode 100644
index 0000000000..681f0e9f28
--- /dev/null
+++ b/layout/tables/celldata.h
@@ -0,0 +1,400 @@
+/* -*- 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 "nsITableCellLayout.h"  // for MAX_COLSPAN / MAX_ROWSPAN
+#include "nsCoord.h"
+#include "mozilla/gfx/Types.h"
+#include "mozilla/WritingModes.h"
+#include <stdint.h>
+
+class nsTableCellFrame;
+class nsCellMap;
+class BCCellData;
+
+/**
+ * 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;
+
+  /**
+   * Implemented in nsCellMap.cpp
+   *
+   * @param aOrigCell  the table cell frame which will be stored in mOrigCell.
+   */
+  explicit CellData(nsTableCellFrame* aOrigCell);
+
+  ~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
+};
+
+// BCPixelSize is in device pixels.
+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 d2a, BCPixelSize px) {
+  return BC_BORDER_START_HALF(px) * d2a;
+}
+static inline nscoord BC_BORDER_END_HALF_COORD(int32_t d2a, BCPixelSize px) {
+  return BC_BORDER_END_HALF(px) * d2a;
+}
+
+// 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);
+
+  inline bool IsIStartStart() const { return (bool)mIStartStart; }
+
+  inline void SetIStartStart(bool aValue) { mIStartStart = aValue; }
+
+  inline bool IsBStartStart() const { return (bool)mBStartStart; }
+
+  inline void SetBStartStart(bool aValue) { mBStartStart = 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;
+  SetBStartStart(true);
+  SetIStartStart(true);
+  mIStartSize = mCornerSubSize = mBStartSize = 0;
+  mCornerSide = mozilla::eLogicalSideBStart;
+  mCornerBevel = false;
+}
+
+inline BCData::~BCData() = default;
+
+inline nscoord BCData::GetIStartEdge(BCBorderOwner& aOwner,
+                                     bool& aStart) const {
+  aOwner = (BCBorderOwner)mIStartOwner;
+  aStart = IsIStartStart();
+
+  return (nscoord)mIStartSize;
+}
+
+inline void BCData::SetIStartEdge(BCBorderOwner aOwner, nscoord aSize,
+                                  bool aStart) {
+  mIStartOwner = aOwner;
+  mIStartSize = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
+  SetIStartStart(aStart);
+}
+
+inline nscoord BCData::GetBStartEdge(BCBorderOwner& aOwner,
+                                     bool& aStart) const {
+  aOwner = (BCBorderOwner)mBStartOwner;
+  aStart = IsBStartStart();
+
+  return (nscoord)mBStartSize;
+}
+
+inline void BCData::SetBStartEdge(BCBorderOwner aOwner, nscoord aSize,
+                                  bool aStart) {
+  mBStartOwner = aOwner;
+  mBStartSize = (aSize > MAX_BORDER_WIDTH) ? MAX_BORDER_WIDTH : aSize;
+  SetBStartStart(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;
+}
+
+#endif