RenderTextWin: Break runs between any two characters that are not in the same code block

base/i18n/char_iterator.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/i18n/char_iterator.h"
 
 #include "third_party/icu/source/common/unicode/utf8.h"
 #include "third_party/icu/source/common/unicode/utf16.h"
 
 namespace base {
@@ skipping 18 matching lines @@
     return false;
 
   array_pos_ = next_pos_;
   char_pos_++;
   if (next_pos_ < len_)
     U8_NEXT(str_, next_pos_, len_, char_);
 
   return true;
 }
 
+void UTF8CharIterator::SetPosition(int32 position) {
+  U8_SET_CP_START(str_, position, array_pos_);
+  next_pos_ = array_pos_;
+  U8_NEXT(str_, next_pos_, len_, char_);
+}
+
 UTF16CharIterator::UTF16CharIterator(const string16* str)
     : str_(reinterpret_cast<const char16*>(str->data())),
       len_(str->size()),
       array_pos_(0),
       next_pos_(0),
       char_pos_(0),
       char_(0) {
   if (len_)
     ReadChar();
 }
@@ skipping 17 matching lines @@
     return false;
 
   array_pos_ = next_pos_;
   char_pos_++;
   if (next_pos_ < len_)
     ReadChar();
 
   return true;
 }
 
+void UTF16CharIterator::SetPosition(int32 position) {
+  array_pos_ = position;
+  U16_SET_CP_START(str_, 0, array_pos_);
+  next_pos_ = array_pos_;
+  ReadChar();
+}
+
 void UTF16CharIterator::ReadChar() {
   // This is actually a huge macro, so is worth having in a separate function.
   U16_NEXT(str_, next_pos_, len_, char_);
 }
 
 }  // namespace i18n
 }  // namespace base