Omit wrapped selection for text under inline containing block.

third_party/WebKit/Source/core/layout/line/InlineTextBox.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 170 matching lines @@
     } else {
       ellipsis->setSelectionState(SelectionNone);
     }
   }
 
   return state;
 }
 
 bool InlineTextBox::hasWrappedSelectionNewline() const {
   DCHECK(!getLineLayoutItem().needsLayout());
+
   SelectionState state = getSelectionState();
-  return (state == SelectionStart || state == SelectionInside)
-         // Checking last leaf child can be slow, so we make sure to do this
-         // only after the other simple conditionals.
-         && (root().lastLeafChild() == this)
-         // It's possible to have mixed LTR/RTL on a single line, and we only
-         // want to paint a newline when we're the last leaf child and we make
-         // sure there isn't a differently-directioned box following us.
-         && ((!isLeftToRightDirection() && root().firstSelectedBox() == this) ||
-             (isLeftToRightDirection() && root().lastSelectedBox() == this));
+  if (state != SelectionStart && state != SelectionInside)
+    return false;
+
+  // Checking last leaf child can be slow, so we make sure to do this
+  // only after checking selection state.
+  if (root().lastLeafChild() != this)
+    return false;
+
+  // It's possible to have mixed LTR/RTL on a single line, and we only
+  // want to paint a newline when we're the last leaf child and we make
+  // sure there isn't a differently-directioned box following us.
+  bool isLTR = isLeftToRightDirection();
+  if ((!isLTR && root().firstSelectedBox() != this) ||
+      (isLTR && root().lastSelectedBox() != this))
+    return false;
+
+  // If we're the last inline text box in containing block, our containing block
+  // is inline, and the selection continues into that block, then rely on the
+  // next inline text box (if any) to paint a wrapped new line as needed.
+  if (nextTextBox())
+    return true;
+  auto rootBlock = root().block();
+  if (rootBlock.isInline() && rootBlock.getSelectionState() != SelectionEnd &&
+      rootBlock.getSelectionState() != SelectionBoth &&
+      rootBlock.inlineBoxWrapper() &&
+      ((isLTR && rootBlock.inlineBoxWrapper()->nextOnLine()) ||
+       (!isLTR && rootBlock.inlineBoxWrapper()->prevOnLine()))) {
+    return false;
+  }
+
+  return true;
 }
 
 float InlineTextBox::newlineSpaceWidth() const {
   const ComputedStyle& styleToUse =
       getLineLayoutItem().styleRef(isFirstLineStyle());
   return styleToUse.font().spaceWidth();
 }
 
 LayoutRect InlineTextBox::localSelectionRect(int startPos, int endPos) const {
   int sPos = std::max(startPos - m_start, 0);
@@ skipping 475 matching lines @@
   const int layoutObjectCharacterOffset = 75;
   for (; printedCharacters < layoutObjectCharacterOffset; printedCharacters++)
     fputc(' ', stderr);
   fprintf(stderr, "(%d,%d) \"%s\"\n", start(), start() + len(),
           value.utf8().data());
 }
 
 #endif
 
 }  // namespace blink