Add TextRange and related methods to Textfield Views.

views/controls/textfield/textfield_views_model.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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"
 #include "base/utf_string_conversions.h"
 #include "gfx/font.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "views/views_delegate.h"
+#include "views/controls/textfield/textfield.h"
 
 namespace views {
 
 TextfieldViewsModel::TextfieldViewsModel()
     : cursor_pos_(0),
       selection_begin_(0),
       is_password_(false) {
 }
 
 TextfieldViewsModel::~TextfieldViewsModel() {
@@ skipping 186 matching lines @@
     return gfx::Rect(x, 0, x_end - x, h);
   }
 }
 
 string16 TextfieldViewsModel::GetSelectedText() const {
   return text_.substr(
       std::min(cursor_pos_, selection_begin_),
       std::abs(static_cast<long>(cursor_pos_ - selection_begin_)));
 }
 
+void TextfieldViewsModel::GetSelectedRange(TextRange* range) const {
+  range->SetRange(selection_begin_, cursor_pos_);
+}
+
+void TextfieldViewsModel::SelectRange(const TextRange& range) {
+  selection_begin_ = GetSafePosition(range.start());
+  cursor_pos_ = GetSafePosition(range.end());
+}
+
 void TextfieldViewsModel::SelectAll() {
   cursor_pos_ = 0;
   selection_begin_ = text_.length();
 }
 
 void TextfieldViewsModel::ClearSelection() {
   selection_begin_ = cursor_pos_;
 }
 
 bool TextfieldViewsModel::Cut() {
@@ skipping 42 matching lines @@
 }
 
 string16 TextfieldViewsModel::GetVisibleText(size_t begin, size_t end) const {
   DCHECK(end >= begin);
   if (is_password_) {
     return string16(end - begin, '*');
   }
   return text_.substr(begin, end - begin);
 }
 
+size_t TextfieldViewsModel::GetSafePosition(size_t position) const {
+  if (position > text_.length()) {
+    return text_.length();
+  }
+  return position;
+}
+
 }  // namespace views