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 11namespace views { 12 13ExternalFocusTracker::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 25ExternalFocusTracker::~ExternalFocusTracker() { 26 view_storage_->RemoveView(last_focused_view_storage_id_); 27 if (focus_manager_) 28 focus_manager_->RemoveFocusChangeListener(this); 29} 30 31void 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 40void ExternalFocusTracker::OnDidChangeFocus(View* focused_before, 41 View* focused_now) { 42} 43 44void 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 51void 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 59void 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 67void ExternalFocusTracker::StartTracking() { 68 StoreLastFocusedView(focus_manager_->GetFocusedView()); 69 focus_manager_->AddFocusChangeListener(this); 70} 71 72} // namespace views 73