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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 COMPONENTS_EXO_WAYLAND_OUTPUT_CONTROLLER_H_
#define COMPONENTS_EXO_WAYLAND_OUTPUT_CONTROLLER_H_
#include "ash/shell_observer.h"
#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/manager/display_manager_observer.h"
struct wl_client;
struct wl_display;
struct wl_resource;
namespace exo::wayland {
class AuraOutputManagerV2;
class WaylandDisplayOutput;
// Responsible for keeping output state consistent with system display state and
// notifying connected wayland clients of any output state changes.
struct OutputController : public display::DisplayManagerObserver,
public ash::ShellObserver {
public:
using DisplayOutputMap =
base::flat_map<int64_t, std::unique_ptr<WaylandDisplayOutput>>;
using WaylandOutputList = std::vector<raw_ptr<const WaylandDisplayOutput>>;
class Delegate {
public:
virtual ~Delegate() = default;
virtual wl_display* GetWaylandDisplay() = 0;
virtual void Flush() = 0;
};
explicit OutputController(Delegate* delegate);
OutputController(const OutputController&) = delete;
OutputController& operator=(const OutputController&) = delete;
~OutputController() override;
// display::DisplayManagerObserver:
void OnDidProcessDisplayChanges(
const DisplayConfigurationChange& configuration_change) override;
// ash::ShellObserver:
void OnDisplayForNewWindowsChanged() override;
// Returns the wl_resource for the wl_output bound to the `client`.
wl_resource* GetOutputResource(wl_client* client, int64_t display_id);
private:
friend class OutputControllerTestApi;
// Returns the WaylandDisplayOutput for the wl_output global associated with
// the `display_id`.
WaylandDisplayOutput* GetWaylandDisplayOutput(int64_t display_id);
// Returns a list of the current active outputs tracked by the server.
WaylandOutputList GetActiveOutputs() const;
// Sends the necessary events for a configuration change to clients of the the
// aura output manager. Returns true if update events were sent and a done is
// needed.
bool ProcessDisplayChangesForAuraOutputManager(
const DisplayConfigurationChange& configuration_change);
// Updates exo to align with the system's currently active window.
void UpdateActivatedDisplayIfNecessary();
// This tracks display-activation-change events dispatched by the controller.
int64_t dispatched_activated_display_id_ = display::kInvalidDisplayId;
DisplayOutputMap outputs_;
std::unique_ptr<AuraOutputManagerV2> aura_output_manager_v2_;
// The delegate will strictly outlive the controller.
const raw_ptr<Delegate> delegate_;
base::ScopedObservation<display::DisplayManager,
display::DisplayManagerObserver>
display_manager_observation_{this};
};
} // namespace exo::wayland
#endif // COMPONENTS_EXO_WAYLAND_OUTPUT_CONTROLLER_H_
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