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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 REMOTING_HOST_LINUX_GNOME_DISPLAY_CONFIG_H_
#define REMOTING_HOST_LINUX_GNOME_DISPLAY_CONFIG_H_
#include <gio/gio.h>
#include <map>
#include <string>
#include <vector>
#include "remoting/host/linux/scoped_glib.h"
namespace remoting {
// This object stores information returned from GNOME's D-Bus API:
// org.gnome.Mutter.DisplayConfig.GetCurrentState(). The API returns information
// as GObject types (GVariant and so on), and this class provides helper
// methods to convert this to C++ types. The caller can read and modify this C++
// data directly. A helper method can then be used to build a GVariant that can
// be passed to the D-Bus method:
// org.gnome.Mutter.DisplayConfig.ApplyMonitorsConfig().
struct GnomeDisplayConfig {
// Type of the "method" parameter in the ApplyMonitorsConfig() API. The
// valid values are documented in the XML schema.
enum class Method : guint {
kVerify = 0,
kTemporary = 1,
kPersistent = 2,
};
struct MonitorMode {
std::string name;
int width;
int height;
bool is_current;
};
struct MonitorInfo {
MonitorInfo();
MonitorInfo(const MonitorInfo&);
MonitorInfo& operator=(const MonitorInfo&);
~MonitorInfo();
// Returns the first mode with is_current set, or nullptr.
const MonitorMode* GetCurrentMode() const;
std::vector<MonitorMode> modes;
int x = 0;
int y = 0;
double scale = 1.0;
bool is_primary = false;
};
GnomeDisplayConfig();
GnomeDisplayConfig(const GnomeDisplayConfig&);
GnomeDisplayConfig& operator=(const GnomeDisplayConfig&);
~GnomeDisplayConfig();
// Called for each entry of the 'monitors' property returned by D-Bus
// GetCurrentState().
void AddMonitorFromVariant(GVariant* monitor);
// Called for each entry of the 'logical_monitors' property returned by D-Bus
// GetCurrentState(). Each logical monitor is assumed to have a single
// physical monitor (identified by connector-name), previously added by
// AddMonitorFromVariant().
void AddLogicalMonitorFromVariant(GVariant* logical_monitor);
// This converts the C++ data into a GVariant `logical_monitors` parameter
// to pass to D-Bus ApplyMonitorsConfig().
ScopedGVariant BuildMonitorsConfigParameters() const;
// The serial number returned by GNOME. When applying a new monitor config,
// GNOME will check that the serial number matches, to avoid race-conditions
// from trying to modify a stale config.
guint serial = 0;
// This property is returned by the GNOME API. If true, GNOME will enforce
// that all monitors have the same scale property.
bool global_scale_required = false;
// The "method" parameter to pass to the ApplyMonitorsConfig() API.
Method method = Method::kPersistent;
std::map<std::string, MonitorInfo> monitors;
};
} // namespace remoting
#endif // REMOTING_HOST_LINUX_GNOME_DISPLAY_CONFIG_H_
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