wip: make a dedicated widget

src/session/view/content/room_history/message_row/content.rs

@@ -6,8 +6,14 @@ use ruma::{events::room::message::MessageType, OwnedEventId, OwnedTransactionId}
 use tracing::{error, warn};
 
 use super::{
-    audio::MessageAudio, caption::MessageCaption, file::MessageFile, location::MessageLocation,
-    reply::MessageReply, text::MessageText, visual_media::MessageVisualMedia,
+    audio::MessageAudio,
+    caption::MessageCaption,
+    file::MessageFile,
+    info::{MessageIcon, MessageInfo},
+    location::MessageLocation,
+    reply::MessageReply,
+    text::MessageText,
+    visual_media::MessageVisualMedia,
 };
 use crate::{
     prelude::*,
@@ -40,20 +46,6 @@ pub enum ContentFormat {
     Ellipsized = 2,
 }
 
-enum MessageIcon {
-    Info,
-    Warning,
-}
-
-impl MessageIcon {
-    fn icon_name(self) -> &'static str {
-        match self {
-            MessageIcon::Info => "info-symbolic",
-            MessageIcon::Warning => "warning-symbolic",
-        }
-    }
-}
-
 mod imp {
     use std::cell::Cell;
 
@@ -293,9 +285,10 @@ trait MessageContentContainer: IsA<gtk::Widget> {
                     );
                 }
                 MsgLikeKind::UnableToDecrypt(_) => {
-                    self.build_info_message_content(
-                        &gettext("Could not decrypt this message, decryption will be retried once the keys are available."),
-                        MessageIcon::Warning,
+                    let child = self.reuse_child_or_default::<MessageInfo>();
+                    child.set_icon(MessageIcon::Warning);
+                    child.set_text(
+                        &gettext("Could not decrypt this message, decryption will be retried once the keys are available.")
                     );
                 }
                 msg_like_kind => {
@@ -365,7 +358,9 @@ trait MessageContentContainer: IsA<gtk::Widget> {
                 );
             }
             MessageType::ServerNotice(message) => {
-                self.build_info_message_content(&message.body.clone(), MessageIcon::Info);
+                let child = self.reuse_child_or_default::<MessageInfo>();
+                child.set_icon(MessageIcon::Info);
+                child.set_text(&message.body.clone());
             }
             MessageType::Text(message) => {
                 let child = self.reuse_child_or_default::<MessageText>();
@@ -385,32 +380,6 @@ trait MessageContentContainer: IsA<gtk::Widget> {
         }
     }
 
-    /// Build the content widget of the given informative message as a child
-    /// of this widget
-    fn build_info_message_content(&self, label: &str, icon: MessageIcon) {
-        let child = gtk::Grid::new();
-        let icon_widget = gtk::Image::new();
-        let icon_name = icon.icon_name();
-        icon_widget.set_icon_name(Some(icon_name));
-        icon_widget.set_margin_start(6);
-        icon_widget.set_margin_end(12);
-        let label_widget = gtk::Label::new(Some(label));
-        label_widget.set_css_classes(&["dimmed"]);
-        label_widget.set_wrap(true);
-        label_widget.set_wrap_mode(gtk::pango::WrapMode::WordChar);
-        label_widget.set_xalign(0.0);
-        label_widget.set_hexpand(true);
-        child.attach(&icon_widget, 0, 0, 1, 1);
-        child.attach_next_to(
-            &label_widget,
-            Some(&icon_widget),
-            gtk::PositionType::Right,
-            1,
-            1,
-        );
-        self.set_child(Some(child.clone().upcast()));
-    }
-
     /// Build the content widget of the given media message as a child of this
     /// widget.
     fn build_media_message_content(

src/session/view/content/room_history/message_row/info.rs

@@ -0,0 +1,79 @@
+use adw::{prelude::*, subclass::prelude::*};
+use gtk::{glib, CompositeTemplate};
+
+#[derive(Default)]
+pub(crate) enum MessageIcon {
+    #[default]
+    Info,
+    Warning,
+}
+
+impl MessageIcon {
+    fn icon_name(self) -> &'static str {
+        match self {
+            MessageIcon::Info => "info-symbolic",
+            MessageIcon::Warning => "warning-symbolic",
+        }
+    }
+}
+
+mod imp {
+    use glib::subclass::InitializingObject;
+
+    use super::*;
+
+    #[derive(Debug, Default, CompositeTemplate)]
+    #[template(
+        resource = "/org/gnome/Fractal/ui/session/view/content/room_history/message_row/info.ui"
+    )]
+    pub struct MessageInfo {
+        #[template_child]
+        icon: TemplateChild<gtk::Image>,
+        #[template_child]
+        description: TemplateChild<gtk::Label>,
+    }
+
+    #[glib::object_subclass]
+    impl ObjectSubclass for MessageInfo {
+        const NAME: &'static str = "ContentMessageInfo";
+        type Type = super::MessageInfo;
+        type ParentType = adw::Bin;
+
+        fn class_init(klass: &mut Self::Class) {
+            Self::bind_template(klass);
+        }
+
+        fn instance_init(obj: &InitializingObject<Self>) {
+            obj.init_template();
+        }
+    }
+
+    impl ObjectImpl for MessageInfo {}
+    impl WidgetImpl for MessageInfo {}
+    impl BinImpl for MessageInfo {}
+
+    impl MessageInfo {
+        pub(super) fn set_icon(&self, icon: MessageIcon) {
+            self.icon.set_icon_name(Some(icon.icon_name()));
+        }
+
+        pub(super) fn set_text(&self, text: String) {
+            self.description.set_text(&text);
+        }
+    }
+}
+
+glib::wrapper! {
+    /// A widget presenting an informative event.
+    pub struct MessageInfo(ObjectSubclass<imp::MessageInfo>)
+        @extends gtk::Widget, adw::Bin, @implements gtk::Accessible;
+}
+
+impl MessageInfo {
+    pub fn new() -> Self {
+        let obj: Self = glib::Object::new();
+        obj.imp().set_icon(Some(MessageIcon::Info));
+        obj.imp().set_text("");
+        obj
+    }
+}

src/session/view/content/room_history/message_row/info.ui

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <template class="ContentMessageInfo" parent="AdwBin">
+    <property name="focusable">True</property>
+    <property name="valign">center</property>
+    <property name="halign">center</property>
+    <child>
+      <object class="GtkGrid">
+        <child>
+          <object class="GtkImage" id="icon">
+            <property name="margin-start">6</property>
+            <property name="margin-end">12</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkLabel" id="description">
+            <property name="css-classes">dimmed</property>
+            <property name="wrap">True</property>
+            <property name="wrap-mode">word-char</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>

src/session/view/content/room_history/message_row/mod.rs

@@ -6,6 +6,7 @@ mod audio;
 mod caption;
 mod content;
 mod file;
+mod info;
 mod location;
 mod message_state_stack;
 mod reaction;