[css-tables] Set table and cell widths dirty when section border changes

third_party/WebKit/Source/core/layout/LayoutTableRow.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 35 matching lines @@
     setInline(false); // our object is not Inline
 }
 
 void LayoutTableRow::willBeRemovedFromTree()
 {
     LayoutTableBoxComponent::willBeRemovedFromTree();
 
     section()->setNeedsCellRecalc();
 }
 
-static bool borderWidthChanged(const ComputedStyle* oldStyle, const ComputedStyle* newStyle)
-{
-    return oldStyle->borderLeftWidth() != newStyle->borderLeftWidth()
-        || oldStyle->borderTopWidth() != newStyle->borderTopWidth()
-        || oldStyle->borderRightWidth() != newStyle->borderRightWidth()
-        || oldStyle->borderBottomWidth() != newStyle->borderBottomWidth();
-}
-
 void LayoutTableRow::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
 {
     ASSERT(style()->display() == TABLE_ROW);
 
     LayoutTableBoxComponent::styleDidChange(diff, oldStyle);
     propagateStyleToAnonymousChildren();
 
     if (section() && oldStyle && style()->logicalHeight() != oldStyle->logicalHeight())
         section()->rowLogicalHeightChanged(this);
 
     // If border was changed, notify table.
     if (parent()) {
         LayoutTable* table = this->table();
         if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border())
             table->invalidateCollapsedBorders();
 
         if (table && oldStyle && diff.needsFullLayout() && needsLayout() && table->collapseBorders() && borderWidthChanged(oldStyle, style())) {
             // If the border width changes on a row, we need to make sure the cells in the row know to lay out again.
             // This only happens when borders are collapsed, since they end up affecting the border sides of the cell
             // itself.
             for (LayoutBox* childBox = firstChildBox(); childBox; childBox = childBox->nextSiblingBox()) {
                 if (!childBox->isTableCell())
                     continue;
+                // TODO(dgrogan) Changing this to setNeedsLayout doesn't cause

[dgrogan, 2016/06/10 22:51:11]

eae@, I'm getting diminishing returns trying to understand how our various
needsLayout bits work -- perhaps we could get together in person to discuss...

+                // any layout tests to fail. Isn't setChildNeedsLayout more
+                // expensive? If setNeedsLayout is insufficient, add a layout
+                // test demonstrating so.
                 childBox->setChildNeedsLayout();
                 childBox->setPreferredLogicalWidthsDirty(MarkOnlyThis);
             }
             // Most table componenents can rely on LayoutObject::styleDidChange
             // to mark the container chain dirty. But LayoutTableSection seems
             // to never clear its dirty bit, which stops the propagation. So
             // anything under LayoutTableSection has to restart the propagation
             // at the table.
             // TODO(dgrogan): Make LayoutTableSection clear its dirty bit.
             table->setPreferredLogicalWidthsDirty();
@@ skipping 163 matching lines @@
     // The cell and the row share the section's coordinate system. However
     // the visual overflow should be determined in the coordinate system of
     // the row, that's why we shift it below.
     LayoutUnit cellOffsetLogicalTopDifference = cell->location().y() - location().y();
     cellVisualOverflowRect.move(LayoutUnit(), cellOffsetLogicalTopDifference);
 
     addContentsVisualOverflow(cellVisualOverflowRect);
 }
 
 } // namespace blink