Move InSameBlock() to InsertParagraphSeparatorCommand.cpp

third_party/WebKit/Source/core/editing/commands/InsertParagraphSeparatorCommand.cpp

 /*
  * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 43 matching lines @@
   while (!cur_block->nextSibling() &&
          isHTMLDivElement(*cur_block->parentElement()) &&
          cur_block->parentElement()->parentElement()) {
     if (cur_block->parentElement()->hasAttributes())
       break;
     cur_block = cur_block->parentElement();
   }
   return cur_block;
 }
 
+static bool InSameBlock(const VisiblePosition& a, const VisiblePosition& b) {
+  DCHECK(a.IsValid()) << a;
+  DCHECK(b.IsValid()) << b;
+  return !a.IsNull() &&
+         EnclosingBlock(a.DeepEquivalent().ComputeContainerNode()) ==
+             EnclosingBlock(b.DeepEquivalent().ComputeContainerNode());
+}
+
 InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(
     Document& document,
     bool must_use_default_paragraph_element,
     bool paste_blockquote_into_unquoted_area)
     : CompositeEditCommand(document),
       must_use_default_paragraph_element_(must_use_default_paragraph_element),
       paste_blockquote_into_unquoted_area_(
           paste_blockquote_into_unquoted_area) {}
 
 bool InsertParagraphSeparatorCommand::PreservesTypingStyle() const {
@@ skipping 513 matching lines @@
           .Build());
   ApplyStyleAfterInsertion(start_block, editing_state);
 }
 
 DEFINE_TRACE(InsertParagraphSeparatorCommand) {
   visitor->Trace(style_);
   CompositeEditCommand::Trace(visitor);
 }
 
 }  // namespace blink