Views: Draw Textfield selected text in gray when top-level Widget loses focus.

ui/views/selection_controller_delegate.cc

+// Copyright 2016 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/selection_controller_delegate.h"
+
+#include "base/logging.h"
+#include "ui/gfx/render_text.h"
+
+namespace views {
+
+TextSelectionDrawState
+SelectionControllerDelegate::UpdateTextSelectionDrawState(
+    const View* this_view,
+    const View* focused_before,
+    const View* focused_now) {
+  // Selection should not be drawn if:
+  //  - Nothing is focused now and |this_view| was not the last focused View.
+  //  - The currently focused View is a different View (not |this_view|).
+  if ((focused_now == nullptr && focused_before != this_view) ||
+      (focused_now != this_view && focused_now != nullptr)) {
+    GetRenderTextForSelectionController()->set_draw_text_selection(false);
+    return TextSelectionDrawState::kDrawAsUnfocused;
+  }
+
+  SkColor selection_bg_color;
+  TextSelectionDrawState text_selection_draw_state;
+  if (focused_now) {
+    selection_bg_color = GetSelectionBackgroundColor();
+    text_selection_draw_state = TextSelectionDrawState::kDrawAsFocused;
+  } else {
+    selection_bg_color = GetSelectionBackgroundUnfocusedColor();
+    text_selection_draw_state = TextSelectionDrawState::kDrawAsLastFocused;
+  }
+  GetRenderTextForSelectionController()->set_selection_color(
+      GetSelectionTextColor());
+  GetRenderTextForSelectionController()->set_selection_background_color(
+      selection_bg_color);
+  GetRenderTextForSelectionController()->set_draw_text_selection(true);
+  return text_selection_draw_state;
+}
+
+void SelectionControllerDelegate::ObserveWidgetFocusChanges(
+    FocusManager* new_focus_manager,
+    bool add_as_listener) {
+  if (focus_manager_) {
+    focus_manager_->RemoveFocusChangeListener(this);
+    focus_manager_ = nullptr;
+  }
+
+  if (add_as_listener) {
+    focus_manager_ = new_focus_manager;
+    if (!focus_manager_) {
+      return;
+    }
+    focus_manager_->AddFocusChangeListener(this);
+  }
+}
+
+void SelectionControllerDelegate::OnDidChangeFocus(View* focused_before,
+                                                   View* focused_now) {}
+
+SelectionControllerDelegate::~SelectionControllerDelegate() {
+  DCHECK(!focus_manager_);
+}
+
+}  // namespace views