From 64e0a76e9cbae6320535f906931da0f539748b95 Mon Sep 17 00:00:00 2001
From: Robert Tari <robert@tari.in>
Date: Wed, 6 Dec 2023 09:41:26 +0100
Subject: Add magnifier toggling logic

---
 src/arctica-greeter.vala | 40 ++++++++++++++++++++++++++++++++++++++++
 src/settings.vala        |  1 +
 2 files changed, 41 insertions(+)

diff --git a/src/arctica-greeter.vala b/src/arctica-greeter.vala
index 1f9bbfa..7e7fd47 100644
--- a/src/arctica-greeter.vala
+++ b/src/arctica-greeter.vala
@@ -1438,9 +1438,24 @@ public class DBusServer : Object
     private ArcticaGreeter pGreeter;
     private Pid nOrca = 0;
     private Pid nOnBoard = 0;
+    private Pid nMagnifier = 0;
     private Gtk.Socket pSocket = null;
     private bool high_contrast_osk = AGSettings.get_boolean(AGSettings.KEY_HIGH_CONTRAST);
 
+    private void onMagnifierClosed (Pid nPid, int nStatus)
+    {
+        nMagnifier = 0;
+
+        try
+        {
+            this.pConnection.emit_signal (null, "/org/ayatana/greeter", "org.ayatana.greeter", "MagnifierClosed", null);
+        }
+        catch (Error pError)
+        {
+            error ("Panic: Could not send magnifier closed signal: %s", pError.message);
+        }
+    }
+
     private void closePid (ref Pid nPid, int nMultiplier)
     {
         if (nPid > 0)
@@ -1464,6 +1479,7 @@ public class DBusServer : Object
     {
         closePid (ref nOnBoard, -1);
         closePid (ref nOrca, 1);
+        closePid (ref nMagnifier, 1);
     }
 
     public DBusServer (DBusConnection pConnection, ArcticaGreeter pGreeter)
@@ -1701,6 +1717,7 @@ public class DBusServer : Object
         else
         {
             closePid (ref nOrca, 1);
+            nOrca = 0;
         }
     }
 
@@ -1713,4 +1730,27 @@ public class DBusServer : Object
         debug ("High-Contrast mode toggled (new state: %b), refreshing OSK, as well.", bActive);
         ToggleOnBoard (AGSettings.get_boolean (AGSettings.KEY_ONSCREEN_KEYBOARD));
     }
+
+    public void ToggleMagnifier (bool bActive) throws GLib.DBusError, GLib.IOError
+    {
+        AGSettings.set_boolean (AGSettings.KEY_MAGNIFIER, bActive);
+
+        if (bActive)
+        {
+            try
+            {
+                Process.spawn_async (null, {"magnus"}, null, SpawnFlags.SEARCH_PATH | SpawnFlags.DO_NOT_REAP_CHILD, null, out nMagnifier);
+                GLib.ChildWatch.add (nMagnifier, onMagnifierClosed);
+            }
+            catch (Error pError)
+            {
+                warning ("Failed to run magnifier: %s", pError.message);
+            }
+        }
+        else
+        {
+            closePid (ref nMagnifier, 1);
+            nMagnifier = 0;
+        }
+    }
 }
diff --git a/src/settings.vala b/src/settings.vala
index 74e6e40..8447c0f 100644
--- a/src/settings.vala
+++ b/src/settings.vala
@@ -83,6 +83,7 @@ public class AGSettings : Object
     public const string KEY_SHUTDOWN_DIALOG_TIMEOUT = "shutdown-dialog-timeout";
     public const string KEY_PREFERRED_SESSIONS = "preferred-sessions";
     public const string KEY_GEOCLUE_AGENT = "geoclue-agent";
+    public const string KEY_MAGNIFIER = "magnifier";
 
     public static bool get_boolean (string key)
     {
-- 
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