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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/views/focus/external_focus_tracker.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "ui/views/focus/view_storage.h" | |
| 9 #include "ui/views/view.h" | |
| 10 | |
| 11 namespace views { | |
| 12 | |
| 13 ExternalFocusTracker::ExternalFocusTracker(View* parent_view, | |
| 14 FocusManager* focus_manager) | |
| 15 : focus_manager_(focus_manager), | |
| 16 parent_view_(parent_view) { | |
| 17 DCHECK(parent_view); | |
| 18 view_storage_ = ViewStorage::GetInstance(); | |
| 19 last_focused_view_storage_id_ = view_storage_->CreateStorageID(); | |
| 20 // Store the view which is focused when we're created. | |
| 21 if (focus_manager_) | |
| 22 StartTracking(); | |
| 23 } | |
| 24 | |
| 25 ExternalFocusTracker::~ExternalFocusTracker() { | |
| 26 view_storage_->RemoveView(last_focused_view_storage_id_); | |
| 27 if (focus_manager_) | |
| 28 focus_manager_->RemoveFocusChangeListener(this); | |
| 29 } | |
| 30 | |
| 31 void ExternalFocusTracker::OnWillChangeFocus(View* focused_before, | |
| 32 View* focused_now) { | |
| 33 if (focused_now && !parent_view_->Contains(focused_now) && | |
| 34 parent_view_ != focused_now) { | |
| 35 // Store the newly focused view. | |
| 36 StoreLastFocusedView(focused_now); | |
| 37 } | |
| 38 } | |
| 39 | |
| 40 void ExternalFocusTracker::OnDidChangeFocus(View* focused_before, | |
| 41 View* focused_now) { | |
| 42 } | |
| 43 | |
| 44 void ExternalFocusTracker::FocusLastFocusedExternalView() { | |
| 45 View* last_focused_view = | |
| 46 view_storage_->RetrieveView(last_focused_view_storage_id_); | |
| 47 if (last_focused_view) | |
| 48 last_focused_view->RequestFocus(); | |
| 49 } | |
| 50 | |
| 51 void ExternalFocusTracker::SetFocusManager(FocusManager* focus_manager) { | |
| 52 if (focus_manager_) | |
| 53 focus_manager_->RemoveFocusChangeListener(this); | |
| 54 focus_manager_ = focus_manager; | |
| 55 if (focus_manager_) | |
| 56 StartTracking(); | |
| 57 } | |
| 58 | |
| 59 void ExternalFocusTracker::StoreLastFocusedView(View* view) { | |
| 60 view_storage_->RemoveView(last_focused_view_storage_id_); | |
| 61 // If the view is NULL, remove the last focused view from storage, but don't | |
| 62 // try to store NULL. | |
| 63 if (view != NULL) | |
| 64 view_storage_->StoreView(last_focused_view_storage_id_, view); | |
| 65 } | |
| 66 | |
| 67 void ExternalFocusTracker::StartTracking() { | |
| 68 StoreLastFocusedView(focus_manager_->GetFocusedView()); | |
| 69 focus_manager_->AddFocusChangeListener(this); | |
| 70 } | |
| 71 | |
| 72 } // namespace views | |
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