Implement Pango RenderText for Linux.

views/controls/textfield/textfield_views_model.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 "views/controls/textfield/textfield_views_model.h"
 
 #include <algorithm>
 
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
@@ skipping 588 matching lines @@
   AddOrMergeEditHistory(new InsertEdit(false, text, range.start()));
   render_text_->SetCursorPosition(range.end());
   ClearComposition();
   if (delegate_)
     delegate_->OnCompositionTextConfirmedOrCleared();
 }
 
 void TextfieldViewsModel::CancelCompositionText() {
   DCHECK(HasCompositionText());
   ui::Range range = render_text_->GetCompositionRange();
+  ClearComposition();
   string16 new_text = GetText();
   render_text_->SetText(new_text.erase(range.start(), range.length()));
   render_text_->SetCursorPosition(range.start());
-  ClearComposition();
   if (delegate_)
     delegate_->OnCompositionTextConfirmedOrCleared();
 }
 
 void TextfieldViewsModel::ClearComposition() {
   render_text_->SetCompositionRange(ui::Range::InvalidRange());
 }
 
 void TextfieldViewsModel::GetCompositionTextRange(ui::Range* range) const {
   *range = ui::Range(render_text_->GetCompositionRange());
@@ skipping 137 matching lines @@
   return false;
 }
 
 void TextfieldViewsModel::ModifyText(size_t delete_from,
                                      size_t delete_to,
                                      const string16& new_text,
                                      size_t new_text_insert_at,
                                      size_t new_cursor_pos) {
   DCHECK_LE(delete_from, delete_to);
   string16 text = GetText();
+  ClearComposition();
   if (delete_from != delete_to)
     render_text_->SetText(text.erase(delete_from, delete_to - delete_from));
   if (!new_text.empty())
     render_text_->SetText(text.insert(new_text_insert_at, new_text));
   render_text_->SetCursorPosition(new_cursor_pos);
   // TODO(oshima): mac selects the text that is just undone (but gtk doesn't).
   // This looks fine feature and we may want to do the same.
 }
 
 }  // namespace views