Create about dialog from appstream metadata

data/app.drey.Dialect.metainfo.xml.in.in

@@ -28,6 +28,7 @@
   <url type="homepage">https://dialectapp.org/</url>
   <url type="donation">https://opencollective.com/dialect/</url>
   <url type="bugtracker">https://github.com/dialect-app/dialect/issues/</url>
+  <url type="help">https://github.com/dialect-app/dialect/discussions/</url>
   <url type="translate">https://hosted.weblate.org/engage/dialect/</url>
   <url type="vcs-browser">https://github.com/dialect-app/dialect/</url>
   <!-- developer_name tag deprecated with Appstream 1.0 -->

dialect/dialect.gresource.xml

@@ -4,14 +4,15 @@
     <file compressed="true">style.css</file>
     <file compressed="true">style-dark.css</file>
 
-    <file compressed="true" preprocess="xml-stripblanks">about.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">preferences.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">shortcuts.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">window.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">widgets/lang_row.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">widgets/lang_selector.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">widgets/provider_preferences.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">widgets/theme_switcher.ui</file>
+
+    <file compressed="true" preprocess="xml-stripblanks" alias="appdata.xml">@appstream-path@</file>
   </gresource>
 
   <gresource prefix="/app/drey/Dialect/icons/scalable/emblems/">

dialect/main.py

@@ -17,7 +17,7 @@
     gi.require_version("Secret", "1")
     gi.require_version("Soup", "3.0")
 
-    from gi.repository import Adw, Gio, GLib, Gst, Gtk
+    from gi.repository import Adw, Gio, GLib, Gst
 except ImportError or ValueError:
     logging.error("Error: GObject dependencies not met.")
 
@@ -181,13 +181,12 @@ def _on_preferences(self, _action, _param):
 
     def _on_about(self, _action, _param):
         """Show about dialog"""
-        builder = Gtk.Builder.new_from_resource(f"{RES_PATH}/about.ui")
-        about: Adw.AboutDialog = builder.get_object("about")  # type: ignore
-
-        about.props.application_icon = APP_ID
-        about.props.version = VERSION
+        about = Adw.AboutDialog.new_from_appdata(f"{RES_PATH}/appdata.xml", VERSION)
+        about.props.version = VERSION  # For development version
+        about.props.comments = _("A translation app for GNOME.")
+        about.props.copyright = _("Copyright 2020–⁠2024 The Dialect Authors")
         about.props.developers = ["Mufeed Ali", "Rafael Mardojai CM http://rafaelmardojai.com", "Libretto"]
-
+        about.props.translator_credits = _("translator-credits")
         about.add_link(_("Donate"), "https://opencollective.com/dialect")
 
         about.present(self.window)

dialect/meson.build

@@ -5,7 +5,6 @@ pkgdatadir = join_paths(get_option('prefix'), get_option('datadir'), meson.proje
 # Resources
 blueprints = custom_target('blueprints',
   input: files(
-    'about.blp',
     'shortcuts.blp',
     'window.blp',
     'widgets/lang_selector.blp',
@@ -17,15 +16,20 @@ blueprints = custom_target('blueprints',
   command: [find_program('blueprint-compiler'), 'batch-compile', '@OUTPUT@', '@CURRENT_SOURCE_DIR@', '@INPUT@'],
 )
 
+gresource_conf = configuration_data()
+gresource_conf.set('appstream-path', appstream_file.full_path())
 gnome.compile_resources('dialect',
-  'dialect.gresource.xml',
-  dependencies: blueprints,
+  configure_file(
+    input: 'dialect.gresource.xml',
+    output: 'dialect.gresource.xml',
+    configuration: gresource_conf,
+  ),
+  dependencies: [blueprints, appstream_file],
   gresource_bundle: true,
   install: true,
   install_dir: pkgdatadir,
 )
 
-
 # Generate dialect bin
 configure_file(
   input: 'dialect.in',