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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/views/external_focus_tracker.h"
#include "chrome/views/view.h"
#include "chrome/views/view_storage.h"
namespace ChromeViews {
ExternalFocusTracker::ExternalFocusTracker(
ChromeViews::View* parent_view, ChromeViews::FocusManager* focus_manager)
: focus_manager_(focus_manager),
parent_view_(parent_view) {
view_storage_ = ChromeViews::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(
ChromeViews::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
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