Implement STYLE_LOWERCASE style for Aura NativeTextfield.

ui/views/controls/textfield/native_textfield_views.cc

 // Copyright (c) 2012 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 "ui/views/controls/textfield/native_textfield_views.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
+#include "base/i18n/case_conversion.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "grit/app_locale_settings.h"
 #include "grit/ui_strings.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/range/range.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/render_text.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/focusable_border.h"
 #include "ui/views/controls/menu/menu_item_view.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
 #include "ui/views/controls/textfield/textfield_views_model.h"
 #include "ui/views/events/event.h"
 #include "ui/views/ime/input_method.h"
 #include "ui/views/metrics.h"
 #include "ui/views/views_delegate.h"
 #include "ui/views/widget/widget.h"
+#include "unicode/uchar.h"
 
 #if defined(OS_LINUX)
 #include "ui/gfx/gtk_util.h"
 #endif
 
 #if defined(USE_AURA)
 #include "ui/aura/cursor.h"
 #endif
 
 namespace {
@@ skipping 24 matching lines @@
       skip_input_method_cancel_composition_(false),
       initiating_drag_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(cursor_timer_(this)),
       aggregated_clicks_(0),
       last_click_time_(),
       last_click_location_(),
       ALLOW_THIS_IN_INITIALIZER_LIST(touch_selection_controller_(
           TouchSelectionController::create(this))) {
   set_border(text_border_);
 
-  // Lowercase is not supported.
-  DCHECK_NE(parent->style(), Textfield::STYLE_LOWERCASE);
-
 #if defined(OS_CHROMEOS)
   GetRenderText()->SetFontList(gfx::FontList(l10n_util::GetStringUTF8(
       IDS_UI_FONT_FAMILY_CROS)));
 #else
   GetRenderText()->SetFontList(gfx::FontList(textfield_->font()));
 #endif
   // Set the default text style.
   gfx::StyleRange default_style;
   default_style.foreground = textfield_->text_color();
   GetRenderText()->set_default_style(default_style);
@@ skipping 98 matching lines @@
   DCHECK(CanDrop(event.data()));
   DCHECK(!initiating_drag_ ||
          !GetRenderText()->IsPointInSelection(event.location()));
   OnBeforeUserAction();
   skip_input_method_cancel_composition_ = true;
 
   gfx::SelectionModel drop_destination_model =
       GetRenderText()->FindCursorPosition(event.location());
   string16 text;
   event.data().GetString(&text);
+  if (textfield_->style() & Textfield::STYLE_LOWERCASE)
+    text = base::i18n::ToLower(text);
 
   // We'll delete the current selection for a drag and drop within this view.
   bool move = initiating_drag_ && !event.IsControlDown() &&
               event.source_operations() & ui::DragDropTypes::DRAG_MOVE;
   if (move) {
     gfx::SelectionModel selected;
     model_->GetSelectionModel(&selected);
     // Adjust the drop destination if it is on or after the current selection.
     size_t drop_destination = drop_destination_model.caret_pos();
     drop_destination -=
@@ skipping 105 matching lines @@
 }
 
 /////////////////////////////////////////////////////////////////
 // NativeTextfieldViews, NativeTextifieldWrapper overrides:
 
 string16 NativeTextfieldViews::GetText() const {
   return model_->GetText();
 }
 
 void NativeTextfieldViews::UpdateText() {
-  model_->SetText(textfield_->text());
+  string16 text = textfield_->text();
+  if (textfield_->style() & Textfield::STYLE_LOWERCASE)
+    text = base::i18n::ToLower(text);
+  model_->SetText(text);
   OnCaretBoundsChanged();
   SchedulePaint();
   textfield_->GetWidget()->NotifyAccessibilityEvent(
       textfield_, ui::AccessibilityTypes::EVENT_TEXT_CHANGED, true);
 }
 
 void NativeTextfieldViews::AppendText(const string16& text) {
   if (text.empty())
     return;
-  model_->Append(text);
+  if (textfield_->style() & Textfield::STYLE_LOWERCASE)
+    model_->Append(base::i18n::ToLower(text));
+  else
+    model_->Append(text);
   OnCaretBoundsChanged();
   SchedulePaint();
 }
 
 string16 NativeTextfieldViews::GetSelectedText() const {
   return model_->GetSelectedText();
 }
 
 void NativeTextfieldViews::SelectAll() {
   OnBeforeUserAction();
@@ skipping 316 matching lines @@
   OnAfterUserAction();
 }
 
 void NativeTextfieldViews::InsertText(const string16& text) {
   // TODO(suzhe): Filter invalid characters.
   if (GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE || text.empty())
     return;
 
   OnBeforeUserAction();
   skip_input_method_cancel_composition_ = true;
+
+  string16 new_text = text;
+  if (textfield_->style() & Textfield::STYLE_LOWERCASE)
+    new_text = base::i18n::ToLower(new_text);
+
   if (GetRenderText()->insert_mode())
-    model_->InsertText(text);
+    model_->InsertText(new_text);
   else
-    model_->ReplaceText(text);
+    model_->ReplaceText(new_text);
   skip_input_method_cancel_composition_ = false;
   UpdateAfterChange(true, true);
   OnAfterUserAction();
 }
 
 void NativeTextfieldViews::InsertChar(char16 ch, int flags) {

[jungshik at Google, 2012/03/26 22:04:34]

This is not a part of your change, but this API seems not right. This should not
accept char16 here. Instead, it should take 'char32' or a pair of char16 (of
which the second can be optional. 

[kochi, 2012/04/09 06:34:20]

According to the native_textfield_views.h comment,
there is a work to be done for support surrogate pair.

So yeah, this is not a part of this CL, but thanks!

On 2012/03/26 22:04:34, Jungshik Shin wrote:

   if (GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE ||
       !ShouldInsertChar(ch, flags)) {
     return;
   }
 
+  if (textfield_->style() & Textfield::STYLE_LOWERCASE)
+    ch = u_tolower(ch);
+
   OnBeforeUserAction();
   skip_input_method_cancel_composition_ = true;
   if (GetRenderText()->insert_mode())
     model_->InsertChar(ch);
   else
     model_->ReplaceChar(ch);
   skip_input_method_cancel_composition_ = false;
   UpdateAfterChange(true, true);
   OnAfterUserAction();
 }
@@ skipping 338 matching lines @@
     if (controller)
       controller->OnAfterCutOrCopy();
     return true;
   }
   return false;
 }
 
 bool NativeTextfieldViews::Paste() {
   const bool success = model_->Paste();
 
+  if (textfield_->style() & Textfield::STYLE_LOWERCASE) {
+    string16 text = model_->GetText();
+    text = base::i18n::ToLower(text);
+    model_->SetText(text);
+  }
+
   // Calls TextfieldController::ContentsChanged() explicitly if the paste action
   // did not change the content at all. See http://crbug.com/79002
   if (success && GetText() == textfield_->text()) {
     TextfieldController* controller = textfield_->GetController();
     if (controller)
       controller->ContentsChanged(textfield_, textfield_->text());
   }
   return success;
 }
 
@@ skipping 60 matching lines @@
 
 #if defined(USE_AURA)
 // static
 NativeTextfieldWrapper* NativeTextfieldWrapper::CreateWrapper(
     Textfield* field) {
   return new NativeTextfieldViews(field);
 }
 #endif
 
 }  // namespace views