| // 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 "ui/views/focus/external_focus_tracker.h" |
| |
| #include "base/logging.h" |
| #include "ui/views/focus/view_storage.h" |
| #include "ui/views/view.h" |
| |
| namespace views { |
| |
| ExternalFocusTracker::ExternalFocusTracker(View* parent_view, |
| FocusManager* focus_manager) |
| : focus_manager_(focus_manager), |
| parent_view_(parent_view) { |
| DCHECK(parent_view); |
| view_storage_ = ViewStorage::GetInstance(); |
| last_focused_view_storage_id_ = view_storage_->CreateStorageID(); |
| // Store the view which is focused when we're created. |
| if (focus_manager_) |
| StartTracking(); |
| } |
| |
| ExternalFocusTracker::~ExternalFocusTracker() { |
| view_storage_->RemoveView(last_focused_view_storage_id_); |
| if (focus_manager_) |
| focus_manager_->RemoveFocusChangeListener(this); |
| } |
| |
| void ExternalFocusTracker::OnWillChangeFocus(View* focused_before, |
| View* focused_now) { |
| if (focused_now && !parent_view_->Contains(focused_now) && |
| parent_view_ != focused_now) { |
| // Store the newly focused view. |
| StoreLastFocusedView(focused_now); |
| } |
| } |
| |
| void ExternalFocusTracker::OnDidChangeFocus(View* focused_before, |
| View* focused_now) { |
| } |
| |
| void ExternalFocusTracker::FocusLastFocusedExternalView() { |
| View* last_focused_view = |
| view_storage_->RetrieveView(last_focused_view_storage_id_); |
| if (last_focused_view) |
| last_focused_view->RequestFocus(); |
| } |
| |
| void ExternalFocusTracker::SetFocusManager(FocusManager* focus_manager) { |
| if (focus_manager_) |
| focus_manager_->RemoveFocusChangeListener(this); |
| focus_manager_ = focus_manager; |
| if (focus_manager_) |
| StartTracking(); |
| } |
| |
| void ExternalFocusTracker::StoreLastFocusedView(View* view) { |
| view_storage_->RemoveView(last_focused_view_storage_id_); |
| // If the view is NULL, remove the last focused view from storage, but don't |
| // try to store NULL. |
| if (view != NULL) |
| view_storage_->StoreView(last_focused_view_storage_id_, view); |
| } |
| |
| void ExternalFocusTracker::StartTracking() { |
| StoreLastFocusedView(focus_manager_->GetFocusedView()); |
| focus_manager_->AddFocusChangeListener(this); |
| } |
| |
| } // namespace views |