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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_COMPONENTS_MAHI_PUBLIC_CPP_MAHI_MEDIA_APP_EVENTS_PROXY_H_
#define CHROMEOS_COMPONENTS_MAHI_PUBLIC_CPP_MAHI_MEDIA_APP_EVENTS_PROXY_H_
#include "base/component_export.h"
#include "base/observer_list_types.h"
#include "base/unguessable_token.h"
namespace gfx {
class Rect;
}
namespace chromeos {
// An interface serves as events proxy from media app to mahi system.
class COMPONENT_EXPORT(MAHI_PUBLIC_CPP) MahiMediaAppEventsProxy {
public:
class Observer : public base::CheckedObserver {
public:
virtual void OnPdfGetFocus(const base::UnguessableToken client_id) {}
// The context menu here is not the system context menu but the one
// implemented by the media app.
virtual void OnPdfContextMenuShown(const gfx::Rect& anchor) {}
virtual void OnPdfContextMenuHide() {}
virtual void OnPdfClosed(const base::UnguessableToken client_id) {}
};
MahiMediaAppEventsProxy(const MahiMediaAppEventsProxy&) = delete;
MahiMediaAppEventsProxy& operator=(const MahiMediaAppEventsProxy&) = delete;
virtual ~MahiMediaAppEventsProxy();
static MahiMediaAppEventsProxy* Get();
virtual void OnPdfGetFocus(const base::UnguessableToken client_id) = 0;
virtual void OnPdfContextMenuShown(const base::UnguessableToken client_id,
const gfx::Rect& anchor) = 0;
virtual void OnPdfContextMenuHide() = 0;
virtual void OnPdfClosed(const base::UnguessableToken client_id) = 0;
virtual void AddObserver(Observer*) = 0;
virtual void RemoveObserver(Observer*) = 0;
protected:
MahiMediaAppEventsProxy();
};
// A scoped object that set the global instance of
// `chromeos::MahiMediaAppEventsProxy::Get()` to the provided object pointer.
// The real instance will be restored when this scoped object is destructed.
// This class is used in testing and mocking.
class COMPONENT_EXPORT(MAHI_PUBLIC_CPP) ScopedMahiMediaAppEventsProxySetter {
public:
explicit ScopedMahiMediaAppEventsProxySetter(MahiMediaAppEventsProxy* proxy);
ScopedMahiMediaAppEventsProxySetter(
const ScopedMahiMediaAppEventsProxySetter&) = delete;
ScopedMahiMediaAppEventsProxySetter& operator=(
const ScopedMahiMediaAppEventsProxySetter&) = delete;
~ScopedMahiMediaAppEventsProxySetter();
private:
static ScopedMahiMediaAppEventsProxySetter* instance_;
raw_ptr<MahiMediaAppEventsProxy> real_proxy_instance_ = nullptr;
};
} // namespace chromeos
#endif // CHROMEOS_COMPONENTS_MAHI_PUBLIC_CPP_MAHI_MEDIA_APP_EVENTS_PROXY_H_
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