Create USB Portal

data/gresource.xml

@@ -4,6 +4,9 @@
     <file compressed="true">Application.css</file>
   </gresource>
   <gresource prefix="/io/elementary/xdg-desktop-portal-pantheon/icons">
+     <file alias="48x48/emblems/emblem-portal-usb.svg" compressed="true" preprocess="xml-stripblanks">icons/usb.svg</file>
+    <file alias="48x48@2/emblems/emblem-portal-usb.svg" compressed="true" preprocess="xml-stripblanks">icons/usb.svg</file>
+
     <file alias="48x48/emblems/emblem-portal-screencast.svg" compressed="true" preprocess="xml-stripblanks">icons/screencast.svg</file>
     <file alias="48x48@2/emblems/emblem-portal-screencast.svg" compressed="true" preprocess="xml-stripblanks">icons/screencast.svg</file>
 

data/pantheon.portal

@@ -1,4 +1,4 @@
 [portal]
 DBusName=org.freedesktop.impl.portal.desktop.pantheon
-Interfaces=org.freedesktop.impl.portal.Access;org.freedesktop.impl.portal.AppChooser;org.freedesktop.impl.portal.Background;org.freedesktop.impl.portal.Screenshot;org.freedesktop.impl.portal.Wallpaper;org.freedesktop.impl.portal.ScreenCast
+Interfaces=org.freedesktop.impl.portal.Access;org.freedesktop.impl.portal.AppChooser;org.freedesktop.impl.portal.Background;org.freedesktop.impl.portal.Screenshot;org.freedesktop.impl.portal.Usb;org.freedesktop.impl.portal.Wallpaper;org.freedesktop.impl.portal.ScreenCast
 UseIn=pantheon

po/POTFILES

@@ -10,3 +10,5 @@ src/Background/Portal.vala
 src/ScreenCast/Dialog.vala
 src/ScreenCast/MonitorTracker/Interface.vala
 src/Screenshot/SetupDialog.vala
+src/Usb/Dialog.vala
+src/Usb/Portal.vala

src/PortalDialog.vala

@@ -54,7 +54,20 @@ public class PortalDialog : Gtk.Window, PantheonWayland.ExtendedBehavior {
     public enum ResponseType {
         ALLOW,
         CANCEL,
-        DELETE_EVENT
+        DELETE_EVENT;
+
+        // Convert to response ID expected by portal backends
+        public uint32 to_id () {
+            switch (this) {
+                case ALLOW:
+                    return 0;
+                case CANCEL:
+                    return 1;
+                default:
+                case DELETE_EVENT:
+                    return 2;
+            }
+        }
     }
 
     /**

src/Usb/Dialog.vala

@@ -0,0 +1,44 @@
+/*
+ * SPDX-FileCopyrigthText: 2026 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+[DBus (name = "org.freedesktop.impl.portal.Request")]
+public class Usb.Dialog : PortalDialog {
+    // The ID used to register this dialog on the DBusConnection
+    public uint register_id { get; set; default = 0; }
+
+    // The ID of the app sending the request
+    public string app_id { get; construct; }
+
+    public string reason {
+        set {
+            secondary_text = _("It provided the following reason, “%s”").printf (value);
+        }
+    }
+
+    public Dialog (string app_id) {
+        Object (app_id: app_id);
+    }
+
+    construct {
+        default_height = -1;
+        title = _("An application wants to access the following USB devices");
+        secondary_icon = new ThemedIcon ("emblem-portal-usb");
+        secondary_text = _("It did not provide a reason for this request.");
+
+        if (app_id != "") {
+            var app_info = new DesktopAppInfo (app_id + ".desktop");
+            if (app_info != null) {
+                primary_icon = app_info.get_icon ();
+                title = _("“%s” wants to access the following USB devices").printf (app_info.get_display_name ());
+            }
+        }
+
+    }
+
+    [DBus (name = "Close")]
+    public void on_close () throws DBusError, IOError {
+        response (DELETE_EVENT);
+    }
+}

src/Usb/Portal.vala

@@ -0,0 +1,65 @@
+/*
+ * SPDX-FileCopyrigthText: 2026 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+[DBus (name = "org.freedesktop.impl.portal.Usb")]
+public class Usb.Portal : Object {
+    private DBusConnection connection;
+
+    public Portal (DBusConnection connection) {
+        this.connection = connection;
+    }
+
+    [DBus (name = "AcquireDevices")]
+    public async void acquire_devices (
+        ObjectPath handle,
+        string parent_window,
+        string app_id,
+        // G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a(sa{sv})"));
+      // IN devices a(sa{sv}a{sv}),
+        HashTable<string, Variant> options,
+        out uint response,
+        out HashTable<string, Variant> results
+    ) throws DBusError, IOError {
+        var dialog = new Dialog (app_id) {
+            parent_handle = parent_window
+        };
+
+        if ("reason" in options) {
+            dialog.reason = options["reason"].get_string ();
+        }
+
+        try {
+            dialog.register_id = connection.register_object<Dialog> (handle, dialog);
+        } catch (Error e) {
+            critical (e.message);
+        }
+
+        var _results = new HashTable<string, Variant> (str_hash, str_equal);
+        uint _response = 2;
+
+        dialog.response.connect ((response) => {
+            switch (response) {
+                case ALLOW:
+
+                    break;
+                default:
+                    break;
+            }
+
+            _response = response.to_id ();
+
+            acquire_devices.callback ();
+        });
+
+        dialog.present ();
+        yield;
+
+        connection.unregister_object (dialog.register_id);
+        dialog.destroy ();
+
+        results = _results;
+        response = _response;
+    }
+}

src/XdgDesktopPortalPantheon.vala

@@ -44,6 +44,9 @@ private void on_bus_acquired (DBusConnection connection, string name) {
         connection.register_object ("/org/freedesktop/portal/desktop", new Screenshot.Portal (connection));
         debug ("Screenshot Portal registered!");
 
+        connection.register_object ("/org/freedesktop/portal/desktop", new Usb.Portal (connection));
+        debug ("USB Portal registered!");
+
         connection.register_object ("/org/freedesktop/portal/desktop", new Wallpaper.Portal (connection));
         debug ("Wallpaper Portal registered!");
 

src/meson.build

@@ -18,6 +18,8 @@ executable(
     'Screenshot/Portal.vala',
     'Screenshot/SetupDialog.vala',
     'Screenshot/Utils.vala',
+    'Usb' / 'Dialog.vala',
+    'Usb' / 'Portal.vala',
     'Wallpaper/Portal.vala',
     configure_file(input: 'Config.vala.in', output: '@BASENAME@', configuration: conf_data),
     'DesktopIntegration.vala',