Implement clipboard features in views textfield.

BUG=none
TEST=Added new test.

Review URL: http://codereview.chromium.org/6004010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71136 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 117 insertions, 1 deletions

diff --git a/views/controls/textfield/native_textfield_views.cc b/views/controls/textfield/native_textfield_views.cc
index 2a42c5a..923de0c 100644
--- a/views/controls/textfield/native_textfield_views.cc
+++ b/views/controls/textfield/native_textfield_views.cc
@@ -445,6 +445,18 @@ bool NativeTextfieldViews::HandleKeyEvent(const KeyEvent& key_event) {
           cursor_changed = true;
         }
         break;
+      case app::VKEY_X:
+        if (control)
+          text_changed = model_->Cut();
+        break;
+      case app::VKEY_C:
+        if (control)
+          model_->Copy();
+        break;
+      case app::VKEY_V:
+        if (control)
+          text_changed = model_->Paste();
+        break;
       case app::VKEY_RIGHT:
         control ? model_->MoveCursorToNextWord(selection)
             : model_->MoveCursorRight(selection);
diff --git a/views/controls/textfield/native_textfield_views.h b/views/controls/textfield/native_textfield_views.h
index f87c42a..b8b4e6e 100644
--- a/views/controls/textfield/native_textfield_views.h
+++ b/views/controls/textfield/native_textfield_views.h
@@ -26,7 +26,6 @@ class TextfieldViewsModel;
 // No platform specific code is used.
 // Following features are not yet supported.
 // * BIDI
-// * Clipboard  (Cut & Paste).
 // * Context Menu.
 // * IME/i18n support.
 // * X selection (only if we want to support).
diff --git a/views/controls/textfield/textfield_views_model.cc b/views/controls/textfield/textfield_views_model.cc
index 0f5b23b..7111ac2 100644
--- a/views/controls/textfield/textfield_views_model.cc
+++ b/views/controls/textfield/textfield_views_model.cc
@@ -10,6 +10,9 @@
 #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 {
 
@@ -225,6 +228,38 @@ 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_;
 }
diff --git a/views/controls/textfield/textfield_views_model.h b/views/controls/textfield/textfield_views_model.h
index 219a8c7..c1fa375 100644
--- a/views/controls/textfield/textfield_views_model.h
+++ b/views/controls/textfield/textfield_views_model.h
@@ -126,6 +126,17 @@ class TextfieldViewsModel {
     return GetVisibleText(0U, text_.length());
   }
 
+  // Cuts the currently selected text and puts it to clipboard. Returns true
+  // if text has changed after cutting.
+  bool Cut();
+
+  // Copies the currently selected text and puts it to clipboard.
+  void Copy();
+
+  // Pastes text from the clipboard at current cursor position. Returns true
+  // if text has changed after pasting.
+  bool Paste();
+
  private:
   friend class NativeTextfieldViews;
 
diff --git a/views/controls/textfield/textfield_views_model_unittest.cc b/views/controls/textfield/textfield_views_model_unittest.cc
index fa09efa..388c8c3 100644
--- a/views/controls/textfield/textfield_views_model_unittest.cc
+++ b/views/controls/textfield/textfield_views_model_unittest.cc
@@ -2,9 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/message_loop.h"
+#include "base/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/clipboard/clipboard.h"
+#include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "views/controls/textfield/textfield_views_model.h"
+#include "views/test/test_views_delegate.h"
+#include "views/views_delegate.h"
 
 namespace views {
 
@@ -282,4 +288,57 @@ TEST(TextfieldViewsModelTest, SetText) {
   EXPECT_EQ(0U, model.cursor_pos());
 }
 
+TEST(TextfieldViewsModelTest, Clipboard) {
+  views::ViewsDelegate::views_delegate = new TestViewsDelegate();
+  ui::Clipboard* clipboard
+      = views::ViewsDelegate::views_delegate->GetClipboard();
+  string16 initial_clipboard_text;
+  clipboard->ReadText(ui::Clipboard::BUFFER_STANDARD, &initial_clipboard_text);
+  string16 clipboard_text;
+  TextfieldViewsModel model;
+  model.Append(ASCIIToUTF16("HELLO WORLD"));
+  model.MoveCursorToEnd(false);
+
+  // Test for cut: Empty selection.
+  EXPECT_FALSE(model.Cut());
+  clipboard->ReadText(ui::Clipboard::BUFFER_STANDARD, &clipboard_text);
+  EXPECT_STR_EQ(UTF16ToUTF8(initial_clipboard_text), clipboard_text);
+  EXPECT_STR_EQ("HELLO WORLD", model.text());
+  EXPECT_EQ(11U, model.cursor_pos());
+
+  // Test for cut: Non-empty selection.
+  model.MoveCursorToPreviousWord(true);
+  EXPECT_TRUE(model.Cut());
+  clipboard->ReadText(ui::Clipboard::BUFFER_STANDARD, &clipboard_text);
+  EXPECT_STR_EQ("WORLD", clipboard_text);
+  EXPECT_STR_EQ("HELLO ", model.text());
+  EXPECT_EQ(6U, model.cursor_pos());
+
+  // Test for copy: Empty selection.
+  model.Copy();
+  clipboard->ReadText(ui::Clipboard::BUFFER_STANDARD, &clipboard_text);
+  EXPECT_STR_EQ("WORLD", clipboard_text);
+  EXPECT_STR_EQ("HELLO ", model.text());
+  EXPECT_EQ(6U, model.cursor_pos());
+
+  // Test for copy: Non-empty selection.
+  model.Append(ASCIIToUTF16("HELLO WORLD"));
+  model.SelectAll();
+  model.Copy();
+  clipboard->ReadText(ui::Clipboard::BUFFER_STANDARD, &clipboard_text);
+  EXPECT_STR_EQ("HELLO HELLO WORLD", clipboard_text);
+  EXPECT_STR_EQ("HELLO HELLO WORLD", model.text());
+  EXPECT_EQ(0U, model.cursor_pos());
+
+  // Test for paste.
+  model.ClearSelection();
+  model.MoveCursorToEnd(false);
+  model.MoveCursorToPreviousWord(true);
+  EXPECT_TRUE(model.Paste());
+  clipboard->ReadText(ui::Clipboard::BUFFER_STANDARD, &clipboard_text);
+  EXPECT_STR_EQ("HELLO HELLO WORLD", clipboard_text);
+  EXPECT_STR_EQ("HELLO HELLO HELLO HELLO WORLD", model.text());
+  EXPECT_EQ(29U, model.cursor_pos());
+}
+
 }  // namespace views