From db9fe43ca979659ab2b1934b8323c83adae5aab3 Mon Sep 17 00:00:00 2001
From: lenemter <lenemter@gmail.com>
Date: Sat, 27 Jan 2024 21:58:19 +0900
Subject: [PATCH 1/2] Sync display settings to Greeter

---
 src/Application.vala              |  2 ++
 src/Backends/DisplaySettings.vala | 53 +++++++++++++++++++++++++++++++
 src/meson.build                   |  1 +
 3 files changed, 56 insertions(+)
 create mode 100644 src/Backends/DisplaySettings.vala

diff --git a/src/Application.vala b/src/Application.vala
index 1efb885e..696da756 100644
--- a/src/Application.vala
+++ b/src/Application.vala
@@ -17,6 +17,7 @@ public sealed class SettingsDaemon.Application : Gtk.Application {
     private Backends.InterfaceSettings interface_settings;
     private Backends.NightLightSettings night_light_settings;
     private Backends.PrefersColorSchemeSettings prefers_color_scheme_settings;
+    private Backends.DisplaySettings display_settings;
 
     private Backends.Housekeeping housekeeping;
 
@@ -54,6 +55,7 @@ public sealed class SettingsDaemon.Application : Gtk.Application {
         base.startup ();
 
         housekeeping = new Backends.Housekeeping ();
+        display_settings = new Backends.DisplaySettings ();
 
         var check_firmware_updates_action = new GLib.SimpleAction ("check-firmware-updates", null);
         check_firmware_updates_action.activate.connect (check_firmware_updates);
diff --git a/src/Backends/DisplaySettings.vala b/src/Backends/DisplaySettings.vala
new file mode 100644
index 00000000..7a63ed77
--- /dev/null
+++ b/src/Backends/DisplaySettings.vala
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2024 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+public class SettingsDaemon.Backends.DisplaySettings : GLib.Object {
+    private string monitors_path;
+    private FileMonitor? file_monitor;
+
+    construct {
+        monitors_path = Path.build_filename (GLib.Environment.get_user_config_dir (), "monitors.xml");
+        sync_monitors_to_greeter ();
+
+        var file = File.new_for_path (monitors_path);
+        try {
+            file_monitor = file.monitor (GLib.FileMonitorFlags.NONE);
+            file_monitor.changed.connect ((file, other_file, type) => {
+                if (type == FileMonitorEvent.CHANGES_DONE_HINT) {
+                    sync_monitors_to_greeter ();
+                }
+            });
+        } catch (Error e) {
+            critical ("Couldn't obtain FileMonitor for %s", monitors_path);
+            file_monitor = null;
+        }
+    }
+
+    private void sync_monitors_to_greeter () {
+        if (!FileUtils.test (monitors_path, EXISTS)) {
+            critical ("%s not found", monitors_path);
+            return;
+        }
+
+        warning ("OwO");
+
+        var source = File.new_for_path (monitors_path);
+        var greeter_data_dir = Environment.get_variable ("XDG_GREETER_DATA_DIR") ?? Path.build_filename ("/var/lib/lightdm-data", Environment.get_user_name ());
+        var folder = File.new_for_path (greeter_data_dir);
+        var dest = folder.get_child ("monitors.xml");
+
+        try {
+            if (!folder.query_exists ()) {
+                folder.make_directory_with_parents ();
+            }
+
+            source.copy (dest, OVERWRITE | ALL_METADATA);
+            // Ensure monitors.xml is readable by greeter user (owner rw, others r)
+            FileUtils.chmod (dest.get_path (), 0604);
+        } catch (Error e) {
+            warning (e.message);
+        }
+    }
+}
diff --git a/src/meson.build b/src/meson.build
index b35eed56..c071f6b8 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,6 +1,7 @@
 sources = files(
     'AccountsService.vala',
     'Application.vala',
+    'Backends/DisplaySettings.vala',
     'Backends/Housekeeping.vala',
     'Backends/InterfaceSettings.vala',
     'Backends/KeyboardSettings.vala',

From 3e0af958a8a03d010b3c688bb9f031c9cc6a30bd Mon Sep 17 00:00:00 2001
From: lenemter <lenemter@gmail.com>
Date: Sat, 27 Jan 2024 21:59:05 +0900
Subject: [PATCH 2/2] Remove debug

---
 src/Backends/DisplaySettings.vala | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/Backends/DisplaySettings.vala b/src/Backends/DisplaySettings.vala
index 7a63ed77..6ea83472 100644
--- a/src/Backends/DisplaySettings.vala
+++ b/src/Backends/DisplaySettings.vala
@@ -31,8 +31,6 @@ public class SettingsDaemon.Backends.DisplaySettings : GLib.Object {
             return;
         }
 
-        warning ("OwO");
-
         var source = File.new_for_path (monitors_path);
         var greeter_data_dir = Environment.get_variable ("XDG_GREETER_DATA_DIR") ?? Path.build_filename ("/var/lib/lightdm-data", Environment.get_user_name ());
         var folder = File.new_for_path (greeter_data_dir);