sidebar: Fix a11y

This allows to read the sidebar with Orca, by doing the following:
* It changes the role for sidebar rows to something which can have a11y labels
* It actually computes the labels and sets them on the rows

src/session/view/sidebar/category_row.rs

@@ -21,6 +21,9 @@ mod imp {
         /// The `CategoryType` to show a label for during a drag-and-drop
         /// operation.
         pub show_label_for_category: Cell<CategoryType>,
+        /// The label showing the category name.
+        #[template_child]
+        pub display_name: TemplateChild<gtk::Label>,
     }
 
     #[glib::object_subclass]
@@ -214,4 +217,9 @@ impl CategoryRow {
         self.notify("show-label-for-category");
         self.notify("label");
     }
+
+    /// Returns the display name widget.
+    pub fn display_name(&self) -> gtk::Label {
+        self.imp().display_name.clone()
+    }
 }

src/session/view/sidebar/room_row.rs

@@ -1,10 +1,11 @@
 use adw::{prelude::*, subclass::prelude::*};
 use gettextrs::gettext;
-use gtk::{gdk, glib, glib::clone, CompositeTemplate};
+use gtk::{accessible::Property, gdk, glib, glib::clone, CompositeTemplate};
 
 use super::Row;
 use crate::{
     components::{ContextMenuBin, ContextMenuBinExt, ContextMenuBinImpl},
+    i18n::gettext_f,
     session::model::{HighlightFlags, Room, RoomType},
     spawn, toast,
     utils::{message_dialog, BoundObject},
@@ -219,12 +220,18 @@ impl RoomRow {
                         obj.update_direct_icon();
                 }),
             );
-
+            let name_handler =
+                room.connect_display_name_notify(clone!(@weak self as obj => move |_| {
+                    obj.update_accessibility_label();
+                }));
             if room.category() == RoomType::Left {
                 imp.display_name.add_css_class("dim-label");
             }
 
-            imp.room.set(room, vec![highlight_handler, direct_handler]);
+            imp.room
+                .set(room, vec![highlight_handler, direct_handler, name_handler]);
+
+            self.update_accessibility_label();
         }
 
         self.update_highlight();
@@ -413,4 +420,27 @@ impl RoomRow {
             imp.display_name_box.remove(&icon);
         }
     }
+
+    fn update_accessibility_label(&self) {
+        self.parent()
+            .unwrap()
+            .update_property(&[Property::Label(&self.accessible_label())]);
+    }
+
+    fn accessible_label(&self) -> String {
+        let Some(room) = self.room() else {
+            return String::new();
+        };
+        if room.is_direct() {
+            gettext_f(
+                // Translators: Do NOT translate the content between '{' and '}', this is a
+                // variable name. Presented to screen readers when a
+                // room is a direct chat with another user.
+                "Direct chat with {name}",
+                &[("name", &room.display_name())],
+            )
+        } else {
+            room.display_name()
+        }
+    }
 }

src/session/view/sidebar/row.rs

@@ -1,6 +1,6 @@
 use adw::{prelude::*, subclass::prelude::*};
 use gettextrs::gettext;
-use gtk::{gdk, glib, glib::clone};
+use gtk::{accessible::Relation, gdk, glib, glib::clone};
 
 use super::{CategoryRow, IconItemRow, RoomRow, Sidebar, VerificationRow};
 use crate::{
@@ -34,6 +34,7 @@ mod imp {
 
         fn class_init(klass: &mut Self::Class) {
             klass.set_css_name("sidebar-row");
+            klass.set_accessible_role(gtk::AccessibleRole::ListItem);
         }
     }
 
@@ -186,6 +187,9 @@ impl Row {
                 } else {
                     let child = CategoryRow::new();
                     self.set_child(Some(&child));
+                    self.update_relation(&[Relation::LabelledBy(&[&child
+                        .display_name()
+                        .upcast()])]);
                     child
                 };
                 child.set_category(Some(category.clone()));