1 files changed, 343 insertions, 0 deletions
diff --git a/layout/tables/nsTableColFrame.h b/layout/tables/nsTableColFrame.h
new file mode 100644
index 000000000..e95fe76b1
--- /dev/null
+++ b/layout/tables/nsTableColFrame.h
@@ -0,0 +1,343 @@
+/* -*- 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 nsTableColFrame_h__
+#define nsTableColFrame_h__
+
+#include "mozilla/Attributes.h"
+#include "celldata.h"
+#include "nscore.h"
+#include "nsContainerFrame.h"
+#include "nsTArray.h"
+#include "nsTableColGroupFrame.h"
+#include "mozilla/WritingModes.h"
+
+class nsTableColFrame : public nsSplittableFrame {
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  enum {eWIDTH_SOURCE_NONE          =0,   // no cell has contributed to the width style
+        eWIDTH_SOURCE_CELL          =1,   // a cell specified a width
+        eWIDTH_SOURCE_CELL_WITH_SPAN=2    // a cell implicitly specified a width via colspan
+  };
+
+  nsTableColType GetColType() const;
+  void SetColType(nsTableColType aType);
+
+  /** instantiate a new instance of nsTableRowFrame.
+    * @param aPresShell the pres shell for this frame
+    *
+    * @return           the frame that was created
+    */
+  friend nsTableColFrame* NS_NewTableColFrame(nsIPresShell* aPresShell,
+                                              nsStyleContext*  aContext);
+
+  nsTableColGroupFrame* GetTableColGroupFrame() const
+  {
+    nsIFrame* parent = GetParent();
+    MOZ_ASSERT(parent && parent->GetType() == nsGkAtoms::tableColGroupFrame);
+    return static_cast<nsTableColGroupFrame*>(parent);
+  }
+
+  nsTableFrame* GetTableFrame() const
+  {
+    return GetTableColGroupFrame()->GetTableFrame();
+  }
+
+  /** @see nsIFrame::DidSetStyleContext */
+  virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
+
+  int32_t GetColIndex() const;
+
+  void SetColIndex (int32_t aColIndex);
+
+  nsTableColFrame* GetNextCol() const;
+
+  virtual void Reflow(nsPresContext*           aPresContext,
+                      ReflowOutput&     aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus&          aStatus) override;
+
+  /**
+   * Table columns never paint anything, nor receive events.
+   */
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override {}
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::tableColFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+
+  virtual nsSplittableType GetSplittableType() const override;
+
+  virtual mozilla::WritingMode GetWritingMode() const override
+    { return GetTableFrame()->GetWritingMode(); }
+
+  /** return the number of the columns the col represents.  always >= 1 */
+  int32_t GetSpan();
+
+  /** convenience method, calls into cellmap */
+  int32_t Count() const;
+
+  nscoord GetIStartBorderWidth() const { return mIStartBorderWidth; }
+  nscoord GetIEndBorderWidth() const { return mIEndBorderWidth; }
+  void SetIStartBorderWidth(BCPixelSize aWidth) { mIStartBorderWidth = aWidth; }
+  void SetIEndBorderWidth(BCPixelSize aWidth) { mIEndBorderWidth = aWidth; }
+
+  /**
+   * Gets inner border widths before collapsing with cell borders
+   * Caller must get istart border from previous column or from table
+   * GetContinuousBCBorderWidth will not overwrite aBorder.IStart
+   * see nsTablePainter about continuous borders
+   *
+   * @return outer iend border width (istart inner for next column)
+   */
+  nscoord GetContinuousBCBorderWidth(mozilla::WritingMode aWM,
+                                     mozilla::LogicalMargin& aBorder);
+  /**
+   * Set full border widths before collapsing with cell borders
+   * @param aForSide - side to set; only valid for bstart, iend, and bend
+   */
+  void SetContinuousBCBorderWidth(mozilla::LogicalSide aForSide,
+                                  BCPixelSize aPixelValue);
+#ifdef DEBUG
+  void Dump(int32_t aIndent);
+#endif
+
+  /**
+   * Restore the default values of the intrinsic widths, so that we can
+   * re-accumulate intrinsic widths from the cells in the column.
+   */
+  void ResetIntrinsics() {
+    mMinCoord = 0;
+    mPrefCoord = 0;
+    mPrefPercent = 0.0f;
+    mHasSpecifiedCoord = false;
+  }
+
+  /**
+   * Restore the default value of the preferred percentage width (the
+   * only intrinsic width used by FixedTableLayoutStrategy.
+   */
+  void ResetPrefPercent() {
+    mPrefPercent = 0.0f;
+  }
+
+  /**
+   * Restore the default values of the temporary buffer for
+   * spanning-cell intrinsic widths (as we process spanning cells).
+   */
+  void ResetSpanIntrinsics() {
+    mSpanMinCoord = 0;
+    mSpanPrefCoord = 0;
+    mSpanPrefPercent = 0.0f;
+  }
+
+  /**
+   * Add the widths for a cell or column element, or the contribution of
+   * the widths from a column-spanning cell:
+   * @param aMinCoord The minimum intrinsic width
+   * @param aPrefCoord The preferred intrinsic width or, if there is a
+   *   specified non-percentage width, max(specified width, minimum intrinsic
+   *   width).
+   * @param aHasSpecifiedCoord Whether there is a specified
+   *   non-percentage width.
+   *
+   * Note that the implementation of this functions is a bit tricky
+   * since mPrefCoord means different things depending on
+   * whether mHasSpecifiedCoord is true (and likewise for aPrefCoord and
+   * aHasSpecifiedCoord).  If mHasSpecifiedCoord is false, then
+   * all widths added had aHasSpecifiedCoord false and mPrefCoord is the
+   * largest of the pref widths.  But if mHasSpecifiedCoord is true,
+   * then mPrefCoord is the largest of (1) the pref widths for cells
+   * with aHasSpecifiedCoord true and (2) the min widths for cells with
+   * aHasSpecifiedCoord false.
+   */
+  void AddCoords(nscoord aMinCoord, nscoord aPrefCoord,
+                 bool aHasSpecifiedCoord) {
+    NS_ASSERTION(aMinCoord <= aPrefCoord, "intrinsic widths out of order");
+
+    if (aHasSpecifiedCoord && !mHasSpecifiedCoord) {
+      mPrefCoord = mMinCoord;
+      mHasSpecifiedCoord = true;
+    }
+    if (!aHasSpecifiedCoord && mHasSpecifiedCoord) {
+      aPrefCoord = aMinCoord; // NOTE: modifying argument
+    }
+
+    if (aMinCoord > mMinCoord)
+      mMinCoord = aMinCoord;
+    if (aPrefCoord > mPrefCoord)
+      mPrefCoord = aPrefCoord;
+
+    NS_ASSERTION(mMinCoord <= mPrefCoord, "min larger than pref");
+  }
+
+  /**
+   * Add a percentage width specified on a cell or column element or the
+   * contribution to this column of a percentage width specified on a
+   * column-spanning cell.
+   */
+  void AddPrefPercent(float aPrefPercent) {
+    if (aPrefPercent > mPrefPercent)
+      mPrefPercent = aPrefPercent;
+  }
+
+  /**
+   * Get the largest minimum intrinsic width for this column.
+   */
+  nscoord GetMinCoord() const { return mMinCoord; }
+  /**
+   * Get the largest preferred width for this column, or, if there were
+   * any specified non-percentage widths (see GetHasSpecifiedCoord), the
+   * largest minimum intrinsic width or specified width.
+   */
+  nscoord GetPrefCoord() const { return mPrefCoord; }
+  /**
+   * Get whether there were any specified widths contributing to this
+   * column.
+   */
+  bool GetHasSpecifiedCoord() const { return mHasSpecifiedCoord; }
+
+  /**
+   * Get the largest specified percentage width contributing to this
+   * column (returns 0 if there were none).
+   */
+  float GetPrefPercent() const { return mPrefPercent; }
+
+  /**
+   * Like AddCoords, but into a temporary buffer used for groups of
+   * column-spanning cells.
+   */
+  void AddSpanCoords(nscoord aSpanMinCoord, nscoord aSpanPrefCoord,
+                     bool aSpanHasSpecifiedCoord) {
+    NS_ASSERTION(aSpanMinCoord <= aSpanPrefCoord,
+                 "intrinsic widths out of order");
+
+    if (!aSpanHasSpecifiedCoord && mHasSpecifiedCoord) {
+      aSpanPrefCoord = aSpanMinCoord; // NOTE: modifying argument
+    }
+
+    if (aSpanMinCoord > mSpanMinCoord)
+      mSpanMinCoord = aSpanMinCoord;
+    if (aSpanPrefCoord > mSpanPrefCoord)
+      mSpanPrefCoord = aSpanPrefCoord;
+
+    NS_ASSERTION(mSpanMinCoord <= mSpanPrefCoord, "min larger than pref");
+  }
+
+  /*
+   * Accumulate percentage widths on column spanning cells into
+   * temporary variables.
+   */
+  void AddSpanPrefPercent(float aSpanPrefPercent) {
+    if (aSpanPrefPercent > mSpanPrefPercent)
+      mSpanPrefPercent = aSpanPrefPercent;
+  }
+
+  /*
+   * Accumulate the temporary variables for column spanning cells into
+   * the primary variables.
+   */
+  void AccumulateSpanIntrinsics() {
+    AddCoords(mSpanMinCoord, mSpanPrefCoord, mHasSpecifiedCoord);
+    AddPrefPercent(mSpanPrefPercent);
+  }
+
+  // Used to adjust a column's pref percent so that the table's total
+  // never exceeeds 100% (by only allowing percentages to be used,
+  // starting at the first column, until they reach 100%).
+  void AdjustPrefPercent(float *aTableTotalPercent) {
+    float allowed = 1.0f - *aTableTotalPercent;
+    if (mPrefPercent > allowed)
+      mPrefPercent = allowed;
+    *aTableTotalPercent += mPrefPercent;
+  }
+
+  // The final width of the column.
+  void ResetFinalISize() {
+    mFinalISize = nscoord_MIN; // so we detect that it changed
+  }
+  void SetFinalISize(nscoord aFinalISize) {
+    mFinalISize = aFinalISize;
+  }
+  nscoord GetFinalISize() {
+    return mFinalISize;
+  }
+
+  virtual bool IsFrameOfType(uint32_t aFlags) const override
+  {
+    return nsSplittableFrame::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:
+
+  explicit nsTableColFrame(nsStyleContext* aContext);
+  ~nsTableColFrame();
+
+  nscoord mMinCoord;
+  nscoord mPrefCoord;
+  nscoord mSpanMinCoord; // XXX...
+  nscoord mSpanPrefCoord; // XXX...
+  float mPrefPercent;
+  float mSpanPrefPercent; // XXX...
+  // ...XXX the four members marked above could be allocated as part of
+  // a separate array allocated only during
+  // BasicTableLayoutStrategy::ComputeColumnIntrinsicISizes (and only
+  // when colspans were present).
+  nscoord mFinalISize;
+
+  // the index of the column with respect to the whole table (starting at 0)
+  // it should never be smaller then the start column index of the parent
+  // colgroup
+  uint32_t mColIndex;
+
+  // border width in pixels of the inner half of the border only
+  BCPixelSize mIStartBorderWidth;
+  BCPixelSize mIEndBorderWidth;
+  BCPixelSize mBStartContBorderWidth;
+  BCPixelSize mIEndContBorderWidth;
+  BCPixelSize mBEndContBorderWidth;
+
+  bool mHasSpecifiedCoord;
+};
+
+inline int32_t nsTableColFrame::GetColIndex() const
+{
+  return mColIndex;
+}
+
+inline void nsTableColFrame::SetColIndex (int32_t aColIndex)
+{
+  mColIndex = aColIndex;
+}
+
+inline nscoord
+nsTableColFrame::GetContinuousBCBorderWidth(mozilla::WritingMode aWM,
+                                            mozilla::LogicalMargin& aBorder)
+{
+  int32_t aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
+  aBorder.BStart(aWM) = BC_BORDER_END_HALF_COORD(aPixelsToTwips,
+                                                 mBStartContBorderWidth);
+  aBorder.IEnd(aWM) = BC_BORDER_START_HALF_COORD(aPixelsToTwips,
+                                                 mIEndContBorderWidth);
+  aBorder.BEnd(aWM) = BC_BORDER_START_HALF_COORD(aPixelsToTwips,
+                                                 mBEndContBorderWidth);
+  return BC_BORDER_END_HALF_COORD(aPixelsToTwips, mIEndContBorderWidth);
+}
+
+#endif
+