Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 219 insertions, 0 deletions

diff --git a/layout/tables/nsTableColGroupFrame.h b/layout/tables/nsTableColGroupFrame.h
new file mode 100644
index 0000000000..08a07b0acc
--- /dev/null
+++ b/layout/tables/nsTableColGroupFrame.h
@@ -0,0 +1,219 @@
+/* -*- 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 nsTableColGroupFrame_h__
+#define nsTableColGroupFrame_h__
+
+#include "mozilla/Attributes.h"
+#include "nscore.h"
+#include "nsContainerFrame.h"
+#include "nsTableFrame.h"
+#include "mozilla/WritingModes.h"
+
+class nsTableColFrame;
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+/**
+ * nsTableColGroupFrame
+ * data structure to maintain information about a single table cell's frame
+ */
+class nsTableColGroupFrame final : public nsContainerFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsTableColGroupFrame)
+
+  /**
+   * instantiate a new instance of nsTableRowFrame.
+   *
+   * @param aPresShell the pres shell for this frame
+   *
+   * @return           the frame that was created
+   */
+  friend nsTableColGroupFrame* NS_NewTableColGroupFrame(
+      mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
+
+  // nsIFrame overrides
+  void Init(nsIContent* aContent, nsContainerFrame* aParent,
+            nsIFrame* aPrevInFlow) override {
+    nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
+    if (!aPrevInFlow) {
+      mWritingMode = GetTableFrame()->GetWritingMode();
+    }
+  }
+
+  nsTableFrame* GetTableFrame() const {
+    nsIFrame* parent = GetParent();
+    MOZ_ASSERT(parent && parent->IsTableFrame());
+    MOZ_ASSERT(!parent->GetPrevInFlow(),
+               "Col group should always be in a first-in-flow table frame");
+    return static_cast<nsTableFrame*>(parent);
+  }
+
+  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                        const nsDisplayListSet& aLists) override;
+
+  /** A colgroup can be caused by three things:
+   * 1) An element with table-column-group display
+   * 2) An element with a table-column display without a
+   *    table-column-group parent
+   * 3) Cells that are not in a column (and hence get an anonymous
+   *    column and colgroup).
+   *
+   * In practice, we don't need to differentiate between cases (1) and (2),
+   * because they both correspond to table-column-group boxes in the spec and
+   * hence have observably identical behavior.  Case three is flagged as a
+   * synthetic colgroup, because it may need to have different behavior in some
+   * cases.
+   */
+  bool IsSynthetic() const;
+  void SetIsSynthetic();
+
+  /** Real in this context are colgroups that come from an element
+   * with table-column-group display or wrap around columns that
+   * come from an element with table-column display. Colgroups
+   * that are the result of wrapping cells in an anonymous
+   * column and colgroup are not considered real here.
+   * @param aTableFrame - the table parent of the colgroups
+   * @return the last real colgroup
+   */
+  static nsTableColGroupFrame* GetLastRealColGroup(nsTableFrame* aTableFrame);
+
+  /** @see nsIFrame::DidSetComputedStyle */
+  void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
+
+  void SetInitialChildList(ChildListID aListID,
+                           nsFrameList&& aChildList) override;
+  void AppendFrames(ChildListID aListID, nsFrameList&& aFrameList) override;
+  void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
+                    const nsLineList::iterator* aPrevFrameLine,
+                    nsFrameList&& aFrameList) override;
+  void RemoveFrame(DestroyContext&, ChildListID, nsIFrame*) override;
+
+  /** remove the column aChild from the column group, if requested renumber
+   * the subsequent columns in this column group and all following column
+   * groups. see also ResetColIndices for this
+   * @param aChild       - the column frame that needs to be removed
+   * @param aResetSubsequentColIndices - if true the columns that follow
+   *                                     after aChild will be reenumerated
+   */
+  void RemoveChild(DestroyContext& aContext, nsTableColFrame& aChild,
+                   bool aResetSubsequentColIndices);
+
+  /** reflow of a column group is a trivial matter of reflowing
+   * the col group's children (columns), and setting this frame
+   * to 0-size.  Since tables are row-centric, column group frames
+   * don't play directly in the rendering game.  They do however
+   * maintain important state that effects table and cell layout.
+   */
+  void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+              const ReflowInput& aReflowInput,
+              nsReflowStatus& aStatus) override;
+
+  /** Add column frames to the table storages: colframe cache and cellmap
+   * this doesn't change the mFrames of the colgroup frame.
+   * @param aFirstColIndex - the index at which aFirstFrame should be inserted
+   *                         into the colframe cache.
+   * @param aResetSubsequentColIndices - the indices of the col frames
+   *                                     after the insertion might need
+   *                                     an update
+   * @param aCols - an iterator that can be used to iterate over the col
+   *                frames to be added.  Once this is done, the frames on the
+   *                sbling chain of its .get() at that point will still need
+   *                their col indices updated.
+   * @result            - if there is no table frame or the table frame is not
+   *                      the first in flow it will return an error
+   */
+  nsresult AddColsToTable(int32_t aFirstColIndex,
+                          bool aResetSubsequentColIndices,
+                          const nsFrameList::Slice& aCols);
+
+#ifdef DEBUG_FRAME_DUMP
+  nsresult GetFrameName(nsAString& aResult) const override;
+  void Dump(int32_t aIndent);
+#endif
+
+  /** returns the number of columns represented by this group.
+   * if there are col children, count them (taking into account the span of
+   * each) else, check my own span attribute.
+   */
+  int32_t GetColCount() const;
+
+  /** first column on the child list */
+  nsTableColFrame* GetFirstColumn();
+  /** next sibling to aChildFrame that is a column frame, first column frame
+   * in the column group if aChildFrame is null
+   */
+  nsTableColFrame* GetNextColumn(nsIFrame* aChildFrame);
+
+  /** @return - the position of the first column in this colgroup in the table
+   * colframe cache.
+   */
+  int32_t GetStartColumnIndex();
+
+  /** set the position of the first column in this colgroup in the table
+   * colframe cache.
+   */
+  void SetStartColumnIndex(int32_t aIndex);
+
+  /** helper method to get the span attribute for this colgroup */
+  int32_t GetSpan();
+
+  /** provide access to the mFrames list
+   */
+  nsFrameList& GetWritableChildList();
+
+  /** set the column index for all frames starting at aStartColFrame, it
+   * will also reset the column indices in all subsequent colgroups
+   * @param aFirstColGroup - start the reset operation inside this colgroup
+   * @param aFirstColIndex - first column that is reset should get this index
+   * @param aStartColFrame - if specified the reset starts with this column
+   *                         inside the colgroup; if not specified, the reset
+   *                         starts with the first column
+   */
+  static void ResetColIndices(nsIFrame* aFirstColGroup, int32_t aFirstColIndex,
+                              nsIFrame* aStartColFrame = nullptr);
+
+  void InvalidateFrame(uint32_t aDisplayItemKey = 0,
+                       bool aRebuildDisplayItems = true) override;
+  void InvalidateFrameWithRect(const nsRect& aRect,
+                               uint32_t aDisplayItemKey = 0,
+                               bool aRebuildDisplayItems = true) override;
+  void InvalidateFrameForRemoval() override { InvalidateFrameSubtree(); }
+
+ protected:
+  nsTableColGroupFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
+
+  void InsertColsReflow(int32_t aColIndex, const nsFrameList::Slice& aCols);
+
+  LogicalSides GetLogicalSkipSides() const override;
+
+  // data members
+  int32_t mColCount;
+  // the starting column index this col group represents. Must be >= 0.
+  int32_t mStartColIndex;
+};
+
+inline nsTableColGroupFrame::nsTableColGroupFrame(ComputedStyle* aStyle,
+                                                  nsPresContext* aPresContext)
+    : nsContainerFrame(aStyle, aPresContext, kClassID),
+      mColCount(0),
+      mStartColIndex(0) {}
+
+inline int32_t nsTableColGroupFrame::GetStartColumnIndex() {
+  return mStartColIndex;
+}
+
+inline void nsTableColGroupFrame::SetStartColumnIndex(int32_t aIndex) {
+  mStartColIndex = aIndex;
+}
+
+inline int32_t nsTableColGroupFrame::GetColCount() const { return mColCount; }
+
+inline nsFrameList& nsTableColGroupFrame::GetWritableChildList() {
+  return mFrames;
+}
+
+#endif