From d4098037a4a6bee464fde4b70644e730e13b487f Mon Sep 17 00:00:00 2001
From: win7-7 <win7-7@users.noreply.github.com>
Date: Sun, 16 Feb 2020 16:06:53 +0200
Subject: Issue #1355 - Make nsTableCellFrame::GetColIndex/GetRowIndex faster

We can devirtualize it, remove some branches.
---
 layout/tables/nsTableFrame.cpp | 41 +++++++++++++++++------------------------
 1 file changed, 17 insertions(+), 24 deletions(-)

(limited to 'layout/tables/nsTableFrame.cpp')

diff --git a/layout/tables/nsTableFrame.cpp b/layout/tables/nsTableFrame.cpp
index 868f83bda..4257c9c57 100644
--- a/layout/tables/nsTableFrame.cpp
+++ b/layout/tables/nsTableFrame.cpp
@@ -368,9 +368,8 @@ nsTableFrame::AttributeChangedFor(nsIFrame*       aFrame,
       nsTableCellMap* cellMap = GetCellMap();
       if (cellMap) {
         // for now just remove the cell from the map and reinsert it
-        int32_t rowIndex, colIndex;
-        cellFrame->GetRowIndex(rowIndex);
-        cellFrame->GetColIndex(colIndex);
+        uint32_t rowIndex = cellFrame->RowIndex();
+        uint32_t colIndex = cellFrame->ColIndex();
         RemoveCell(cellFrame, rowIndex);
         AutoTArray<nsTableCellFrame*, 1> cells;
         cells.AppendElement(cellFrame);
@@ -447,9 +446,7 @@ nsTableFrame::GetEffectiveRowSpan(int32_t                 aRowIndex,
   nsTableCellMap* cellMap = GetCellMap();
   NS_PRECONDITION (nullptr != cellMap, "bad call, cellMap not yet allocated.");
 
-  int32_t colIndex;
-  aCell.GetColIndex(colIndex);
-  return cellMap->GetEffectiveRowSpan(aRowIndex, colIndex);
+  return cellMap->GetEffectiveRowSpan(aRowIndex, aCell.ColIndex());
 }
 
 int32_t
@@ -458,9 +455,8 @@ nsTableFrame::GetEffectiveRowSpan(const nsTableCellFrame& aCell,
 {
   nsTableCellMap* tableCellMap = GetCellMap(); if (!tableCellMap) ABORT1(1);
 
-  int32_t colIndex, rowIndex;
-  aCell.GetColIndex(colIndex);
-  aCell.GetRowIndex(rowIndex);
+  uint32_t colIndex = aCell.ColIndex();
+  uint32_t rowIndex = aCell.RowIndex();
 
   if (aCellMap)
     return aCellMap->GetRowSpan(rowIndex, colIndex, true);
@@ -474,9 +470,8 @@ nsTableFrame::GetEffectiveColSpan(const nsTableCellFrame& aCell,
 {
   nsTableCellMap* tableCellMap = GetCellMap(); if (!tableCellMap) ABORT1(1);
 
-  int32_t colIndex, rowIndex;
-  aCell.GetColIndex(colIndex);
-  aCell.GetRowIndex(rowIndex);
+  uint32_t colIndex = aCell.ColIndex();
+  uint32_t rowIndex = aCell.RowIndex();
 
   if (aCellMap)
     return aCellMap->GetEffectiveColSpan(*tableCellMap, rowIndex, colIndex);
@@ -1221,9 +1216,9 @@ PaintRowGroupBackground(nsTableRowGroupFrame* aRowGroup,
                         const nsRect& aDirtyRect)
 {
   for (nsTableRowFrame* row = aRowGroup->GetFirstRow(); row; row = row->GetNextRow()) {
-     if (!aDirtyRect.Intersects(nsRect(row->GetNormalPosition(), row->GetSize()))) {
-       continue;
-     }
+    if (!aDirtyRect.Intersects(nsRect(row->GetNormalPosition(), row->GetSize()))) {
+      continue;
+    }
     PaintRowBackground(row, aFrame, aBuilder, aLists, aDirtyRect, row->GetNormalPosition());
   }
 }
@@ -1234,7 +1229,7 @@ PaintRowGroupBackgroundByColIdx(nsTableRowGroupFrame* aRowGroup,
                                 nsDisplayListBuilder* aBuilder,
                                 const nsDisplayListSet& aLists,
                                 const nsRect& aDirtyRect,
-                                const nsTArray<int32_t>& aColIdx,
+                                const nsTArray<uint32_t>& aColIdx,
                                 const nsPoint& aOffset)
 {
   MOZ_DIAGNOSTIC_ASSERT(!aColIdx.IsEmpty(),
@@ -1246,8 +1241,7 @@ PaintRowGroupBackgroundByColIdx(nsTableRowGroupFrame* aRowGroup,
     }
     for (nsTableCellFrame* cell = row->GetFirstCell(); cell; cell = cell->GetNextCell()) {
 
-      int32_t curColIdx;
-      cell->GetColIndex(curColIdx);
+      uint32_t curColIdx = cell->ColIndex();
       if (!aColIdx.Contains(curColIdx)) {
         if (curColIdx > aColIdx.LastElement()) {
           // We can just stop looking at this row.
@@ -1318,10 +1312,10 @@ nsTableFrame::DisplayGenericTablePart(nsDisplayListBuilder* aBuilder,
     // Compute background rect by iterating all cell frame.
     nsTableColGroupFrame* colGroup = static_cast<nsTableColGroupFrame*>(aFrame);
     // Collecting column index.
-    AutoTArray<int32_t, 1> colIdx;
+    AutoTArray<uint32_t, 1> colIdx;
     for (nsTableColFrame* col = colGroup->GetFirstColumn(); col; col = col->GetNextCol()) {
       MOZ_ASSERT(colIdx.IsEmpty() ||
-                 col->GetColIndex() > colIdx.LastElement());
+                 static_cast<uint32_t>(col->GetColIndex()) > colIdx.LastElement());
       colIdx.AppendElement(col->GetColIndex());
     }
 
@@ -1341,7 +1335,7 @@ nsTableFrame::DisplayGenericTablePart(nsDisplayListBuilder* aBuilder,
   } else if (aFrame->GetType() == nsGkAtoms::tableColFrame) {
     // Compute background rect by iterating all cell frame.
     nsTableColFrame* col = static_cast<nsTableColFrame*>(aFrame);
-    AutoTArray<int32_t, 1> colIdx;
+    AutoTArray<uint32_t, 1> colIdx;
     colIdx.AppendElement(col->GetColIndex());
 
     nsTableFrame* table = col->GetTableFrame();
@@ -3973,9 +3967,8 @@ nsTableFrame::DumpRowGroup(nsIFrame* aKidFrame)
       for (nsIFrame* childFrame : cFrame->PrincipalChildList()) {
         nsTableCellFrame *cellFrame = do_QueryFrame(childFrame);
         if (cellFrame) {
-          int32_t colIndex;
-          cellFrame->GetColIndex(colIndex);
-          printf("cell(%d)=%p ", colIndex, static_cast<void*>(childFrame));
+          uint32_t colIndex = cellFrame->ColIndex();
+          printf("cell(%u)=%p ", colIndex, static_cast<void*>(childFrame));
         }
       }
       printf("\n");
-- 
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