blob: b08d2875600e1635b21bb71ffde432e95dbdf36b [file] [log] [blame]
// Copyright (c) 2006-2008 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 "views/focus/external_focus_tracker.h"
#include "base/logging.h"
#include "views/view.h"
#include "views/focus/view_storage.h"
namespace views {
ExternalFocusTracker::ExternalFocusTracker(View* parent_view,
FocusManager* focus_manager)
: focus_manager_(focus_manager),
parent_view_(parent_view) {
DCHECK(focus_manager);
DCHECK(parent_view);
view_storage_ = ViewStorage::GetSharedInstance();
last_focused_view_storage_id_ = view_storage_->CreateStorageID();
// Store the view which is focused when we're created.
StartTracking();
}
ExternalFocusTracker::~ExternalFocusTracker() {
view_storage_->RemoveView(last_focused_view_storage_id_);
if (focus_manager_)
focus_manager_->RemoveFocusChangeListener(this);
}
void ExternalFocusTracker::FocusWillChange(View* focused_before,
View* focused_now) {
if (focused_now && !parent_view_->IsParentOf(focused_now) &&
parent_view_ != focused_now) {
// Store the newly focused view.
StoreLastFocusedView(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