Implement clipboard features in views textfield.

views/controls/textfield/textfield_views_model.cc

 // Copyright (c) 2010 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"
 
 namespace views {
 
 TextfieldViewsModel::TextfieldViewsModel()
     : cursor_pos_(0),
       selection_begin_(0),
       is_password_(false) {
 }
 
 TextfieldViewsModel::~TextfieldViewsModel() {
@@ skipping 195 matching lines @@
 
 void TextfieldViewsModel::SelectAll() {
   cursor_pos_ = 0;
   selection_begin_ = text_.length();
 }
 
 void TextfieldViewsModel::ClearSelection() {
   selection_begin_ = cursor_pos_;
 }
 
+bool TextfieldViewsModel::Cut() {
+  if (HasSelection()) {
+    ui::ScopedClipboardWriter(views::ViewsDelegate::views_delegate
+        ->GetClipboard()).WriteText(GetSelectedText());
+    DeleteSelection();
+    return true;
+  }
+  return false;
+}
+
+void TextfieldViewsModel::Copy() {
+  if (HasSelection()) {
+    ui::ScopedClipboardWriter(views::ViewsDelegate::views_delegate
+        ->GetClipboard()).WriteText(GetSelectedText());
+  }
+}
+
+bool TextfieldViewsModel::Paste() {
+  string16 result;
+  views::ViewsDelegate::views_delegate->GetClipboard()
+      ->ReadText(ui::Clipboard::BUFFER_STANDARD, &result);
+  if (!result.empty()) {
+    if (HasSelection())
+      DeleteSelection();
+    text_.insert(cursor_pos_, result);
+    cursor_pos_ += result.length();
+    ClearSelection();
+    return true;
+  }
+  return false;
+}
+
 bool TextfieldViewsModel::HasSelection() const {
   return selection_begin_ != cursor_pos_;
 }
 
 void TextfieldViewsModel::DeleteSelection() {
   DCHECK(HasSelection());
   size_t n = std::abs(static_cast<long>(cursor_pos_ - selection_begin_));
   size_t begin = std::min(cursor_pos_, selection_begin_);
   text_.erase(begin, n);
   cursor_pos_ = begin;
   ClearSelection();
 }
 
 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);
 }
 
 }  // namespace views