halt vanilla-installer if non-uefi device is returned

vanilla_installer/assets/CREDITS

@@ -1,2 +1,4 @@
 Computer illustration from GNOME Initial Setup by Tobias Bernard licensed under the GNU General Public License Version 2.
 App icons from various GNOME projects.
+
+Unsupported.svg is extracted from Toggle's mockup and is provided by the illustrator(Brage: https://bragefuglseth.dev/) such that it can be re-used in vanilla-installer

vanilla_installer/gtk/window-unsupported.ui

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <requires lib="libadwaita" version="1.0"/>
+  <template class="VanillaUnsupportedWindow" parent="AdwWindow">
+    <property name="default-width">800</property>
+    <property name="default-height">600</property>
+    <property name="deletable">False</property>
+    <child>
+      <object class="GtkBox">
+        <property name="orientation">vertical</property>
+        <property name="valign">center</property>
+        <property name="spacing">24</property>
+        <child>
+          <object class="AdwClamp">
+            <property name="maximum-size">450</property>
+            <child>
+              <object class="GtkPicture">
+                <property name="file">resource:///org/vanillaos/Installer/assets/unsupported.svg</property>
+                <property name="can-shrink">False</property>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="GtkBox">
+            <property name="orientation">vertical</property>
+            <property name="valign">center</property>
+            <property name="spacing">12</property>
+            <child>
+              <object class="GtkLabel" id="title_label">
+                <property name="wrap">True</property>
+                <property name="wrap-mode">word-char</property>
+                <property name="justify">center</property>
+                <property name="label">Cannot Install</property>
+                <style>
+                  <class name="title"/>
+                  <class name="title-1"/>
+                </style>
+              </object>
+            </child>
+            <child>
+              <object class="GtkLabel" id="description_label">
+                <property name="wrap">True</property>
+                <property name="wrap-mode">word-char</property>
+                <property name="justify">center</property>
+                <style>
+                  <class name="body"/>
+                  <class name="description"/>
+                </style>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="btn_poweroff">
+            <property name="margin-top">12</property>
+            <property name="label" translatable="yes">Power Off...</property>
+            <property name="halign">center</property>
+            <style>
+              <class name="suggested-action"/>
+              <class name="pill"/>
+            </style>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>

vanilla_installer/main.py

@@ -31,12 +31,14 @@
 from gi.repository import Adw, Gio
 
 from vanilla_installer.windows.main_window import VanillaWindow
+from vanilla_installer.windows.window_unsupported import VanillaUnsupportedWindow
+from vanilla_installer.core.system import Systeminfo
 
 
 logging.basicConfig(level=logging.INFO)
 
 
-class FirstSetupApplication(Adw.Application):
+class VanillaInstaller(Adw.Application):
     """The main application singleton class."""
 
     def __init__(self):
@@ -57,7 +59,10 @@ def do_activate(self):
 
         win = self.props.active_window
         if not win:
-            win = VanillaWindow(application=self)
+            if Systeminfo.is_uefi():
+                win = VanillaWindow(application=self)
+            else:
+                win = VanillaUnsupportedWindow(application=self)
         win.present()
 
     def create_action(self, name, callback, shortcuts=None):
@@ -82,5 +87,5 @@ def close(self, *args):
 
 def main(version):
     """The application's entry point."""
-    app = FirstSetupApplication()
+    app = VanillaInstaller()
     return app.run(sys.argv)

vanilla_installer/vanilla-installer.gresource.xml

@@ -2,6 +2,7 @@
 <gresources>
   <gresource prefix="/org/vanillaos/Installer">
     <file>gtk/window.ui</file>
+    <file>gtk/window-unsupported.ui</file>
     <file>gtk/confirm.ui</file>
     <file>gtk/done.ui</file>
     <file>gtk/progress.ui</file>
@@ -44,6 +45,7 @@
     <file>assets/complete.svg</file>
     <file>assets/control-center.svg</file>
     <file>assets/containerized.svg</file>
+    <file>assets/unsupported.svg</file>
 </gresource>
   <gresource prefix="/org/vanillaos/Installer/icons/scalable/actions/">
     <file preprocess="xml-stripblanks">../data/icons/hicolor/symbolic/actions/background-app-ghost-symbolic.svg</file>

vanilla_installer/windows/meson.build

@@ -8,6 +8,7 @@ sources = [
   'dialog_output.py',
   'dialog_recovery.py',
   'dialog_poweroff.py',
+  'window_unsupported.py',
 ]
 
 install_data(sources, install_dir: windowsdir)

vanilla_installer/windows/window_unsupported.py

@@ -0,0 +1,39 @@
+# window_unsupported.py
+#
+# Copyright 2023 muqtadir
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundationat version 3 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from gettext import gettext as _
+import subprocess
+from gi.repository import Adw, Gtk
+from vanilla_installer.utils.recipe import RecipeLoader
+
+
+@Gtk.Template(resource_path="/org/vanillaos/Installer/gtk/window-unsupported.ui")
+class VanillaUnsupportedWindow(Adw.Window):
+    __gtype_name__ = "VanillaUnsupportedWindow"
+
+    btn_poweroff = Gtk.Template.Child()
+    description_label = Gtk.Template.Child()
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+        self.description_label.set_label(f"{RecipeLoader().raw['distro_name']} requires UEFI to install")
+        self.btn_poweroff.connect("clicked", self.__on_poweroff)
+
+    def __on_poweroff(self, btn):
+        subprocess.call(["systemctl", "poweroff"])
+
+