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// Copyright 2014 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.
#ifndef UI_DISPLAY_MANAGER_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
#define UI_DISPLAY_MANAGER_UPDATE_DISPLAY_CONFIGURATION_TASK_H_
#include <stdint.h>
#include <memory>
#include <vector>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "base/time/time.h"
#include "ui/display/manager/configure_displays_task.h"
#include "ui/display/manager/display_configurator.h"
#include "ui/display/types/native_display_observer.h"
namespace display {
class DisplaySnapshot;
class NativeDisplayDelegate;
class DISPLAY_MANAGER_EXPORT UpdateDisplayConfigurationTask
: public NativeDisplayObserver {
public:
using ResponseCallback = base::OnceCallback<void(
/*success=*/bool,
/*displays=*/const std::vector<DisplaySnapshot*>&,
/*unassociated_displays=*/const std::vector<DisplaySnapshot*>&,
/*new_display_state=*/MultipleDisplayState,
/*new_power_state=*/chromeos::DisplayPowerState)>;
UpdateDisplayConfigurationTask(NativeDisplayDelegate* delegate,
DisplayLayoutManager* layout_manager,
MultipleDisplayState new_display_state,
chromeos::DisplayPowerState new_power_state,
int power_flags,
bool force_configure,
ResponseCallback callback);
~UpdateDisplayConfigurationTask() override;
void Run();
// display::NativeDisplayObserver:
void OnConfigurationChanged() override;
void OnDisplaySnapshotsInvalidated() override;
private:
// Callback to NativeDisplayDelegate::GetDisplays().
void OnDisplaysUpdated(const std::vector<DisplaySnapshot*>& displays);
// Callback to ConfigureDisplaysTask used to process the result of a display
// configuration run.
void OnStateEntered(ConfigureDisplaysTask::Status status);
// If the initial display configuration run failed due to errors entering
// mirror more, another configuration run is executed to enter software
// mirroring. This is the callback used to process the result of that
// configuration.
void OnEnableSoftwareMirroring(ConfigureDisplaysTask::Status status);
// Starts the configuration process. |callback| is used to continue the task
// after |configure_taks_| finishes executing.
void EnterState(ConfigureDisplaysTask::ResponseCallback callback);
// Finishes display configuration and runs |callback_|.
void FinishConfiguration(bool success);
// Returns true if the DPMS state should be force to on.
bool ShouldForceDpms() const;
// Returns true if a display configuration is required.
bool ShouldConfigure() const;
// Returns a display state based on the power state.
MultipleDisplayState ChooseDisplayState() const;
NativeDisplayDelegate* delegate_; // Not owned.
DisplayLayoutManager* layout_manager_; // Not owned.
// Requested display state.
MultipleDisplayState new_display_state_;
// Requested power state.
chromeos::DisplayPowerState new_power_state_;
// Bitwise-or-ed values for the kSetDisplayPower* values defined in
// DisplayConfigurator.
int power_flags_;
bool force_configure_;
// Used to signal that the task has finished.
ResponseCallback callback_;
bool requesting_displays_;
// List of updated displays.
std::vector<DisplaySnapshot*> cached_displays_;
// List of updated displays which have no associated crtc. It can happen
// when the device is connected with so many displays that has no available
// crtc to assign.
std::vector<DisplaySnapshot*> cached_unassociated_displays_;
std::unique_ptr<ConfigureDisplaysTask> configure_task_;
// The timestamp when Run() was called. Null if the task is not running.
base::Optional<base::TimeTicks> start_timestamp_;
base::WeakPtrFactory<UpdateDisplayConfigurationTask> weak_ptr_factory_{this};
DISALLOW_COPY_AND_ASSIGN(UpdateDisplayConfigurationTask);
};
} // namespace display
#endif // UI_DISPLAY_MANAGER_UPDATE_DISPLAY_CONFIGURATION_TASK_H_