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// Copyright 2015 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 "components/mus/public/cpp/scoped_view_ptr.h"
#include "components/mus/public/cpp/view.h"
#include "components/mus/public/cpp/view_observer.h"
#include "components/mus/public/cpp/view_tree_connection.h"
namespace mojo {
ScopedViewPtr::ScopedViewPtr(View* view) : view_(view) {
view_->AddObserver(this);
}
ScopedViewPtr::~ScopedViewPtr() {
if (view_)
DeleteViewOrViewManager(view_);
DetachFromView();
}
// static
void ScopedViewPtr::DeleteViewOrViewManager(View* view) {
if (view->connection()->GetRoot() == view)
delete view->connection();
else
view->Destroy();
}
void ScopedViewPtr::DetachFromView() {
if (!view_)
return;
view_->RemoveObserver(this);
view_ = nullptr;
}
void ScopedViewPtr::OnViewDestroying(View* view) {
DCHECK_EQ(view_, view);
DetachFromView();
}
} // namespace mojo
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