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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_DISPLAY_MANAGER_DISPLAY_PORT_OBSERVER_H_
#define UI_DISPLAY_MANAGER_DISPLAY_PORT_OBSERVER_H_
#include <set>
#include <vector>
#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "ui/display/manager/display_configurator.h"
namespace display {
// DisplayPortObserver keeps track of which USB-C ports are used for displays
// and notifies Type C Daemon in ChromiumOS.
class DISPLAY_MANAGER_EXPORT DisplayPortObserver
: public DisplayConfigurator::Observer {
public:
explicit DisplayPortObserver(
DisplayConfigurator* configurator,
base::RepeatingCallback<void(const std::vector<uint32_t>&)>
on_port_change_callback);
DisplayPortObserver(const DisplayPortObserver&) = delete;
DisplayPortObserver& operator=(const DisplayPortObserver&) = delete;
~DisplayPortObserver() override;
// Overridden from DisplayConfigurator::Observer:
void OnDisplayConfigurationChanged(
const DisplayConfigurator::DisplayStateList& outputs) override;
void OnDisplayConfigurationChangeFailed(
const DisplayConfigurator::DisplayStateList& displays,
MultipleDisplayState failed_new_state) override;
private:
friend class DisplayChangeObserverTest;
void SetTypeCPortsUsingDisplays(std::vector<uint32_t> port_nums);
const raw_ptr<DisplayConfigurator> configurator_;
// Used to determine if there is a change in ports.
std::set<uint64_t> prev_base_connector_ids_;
// Callback function to be called by OnDisplayConfigurationChanged. The
// parameter is a list of port numbers that has displays connected. This shall
// be initialized and set by ash to call a D-bus method that notifies ChromeOS
// Type C Daemon on which ports are driving displays.
const base::RepeatingCallback<void(const std::vector<uint32_t>&)>
on_port_change_callback_;
base::WeakPtrFactory<DisplayPortObserver> weak_ptr_factory_{this};
};
} // namespace display
#endif // UI_DISPLAY_MANAGER_DISPLAY_PORT_OBSERVER_H_
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