feat: redesign the sidebar and workspace (#53)

Reviewed-on: #53

assets/icons/arrow-down-circle.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none">
+<path d="M2.75 12C2.75 17.1086 6.89137 21.25 12 21.25C17.1086 21.25 21.25 17.1086 21.25 12C21.25 6.89137 17.1086 2.75 12 2.75C6.89137 2.75 2.75 6.89137 2.75 12Z" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/><path d="M15.25 13L12 16.25L8.75 13" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/><path d="M12 7.75V15.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

assets/icons/hashtag.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none">
+<path d="M8.75 3.75L6.75 20.25M17.25 3.75L15.25 20.25M3.75 7.75H20.25M20.25 16.25H3.75" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

assets/icons/panel-left-open.svg

@@ -1,3 +1,3 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M9 5.5V18.5H19.25C19.9404 18.5 20.5 17.9404 20.5 17.25V6.75C20.5 6.05964 19.9404 5.5 19.25 5.5H9ZM2 6.75C2 5.23122 3.23122 4 4.75 4H19.25C20.7688 4 22 5.23122 22 6.75V17.25C22 18.7688 20.7688 20 19.25 20H4.75C3.23122 20 2 18.7688 2 17.25V6.75Z" fill="currentColor"/>
+<path fill-rule="evenodd" clip-rule="evenodd" d="M4.75 4C3.23122 4 2 5.23122 2 6.75V17.25C2 18.7688 3.23122 20 4.75 20H19.25C20.7688 20 22 18.7688 22 17.25V6.75C22 5.23122 20.7688 4 19.25 4H4.75ZM3.5 6.75C3.5 6.05964 4.05964 5.5 4.75 5.5H10.5V18.5H4.75C4.05964 18.5 3.5 17.9404 3.5 17.25V6.75Z" fill="currentColor"/><path fill-rule="evenodd" clip-rule="evenodd" d="M7 9.5C6.44772 9.5 6 9.05228 6 8.5C6 7.94772 6.44772 7.5 7 7.5C7.55228 7.5 8 7.94772 8 8.5C8 9.05228 7.55228 9.5 7 9.5ZM7 13C6.44772 13 6 12.5523 6 12C6 11.4477 6.44772 11 7 11C7.55228 11 8 11.4477 8 12C8 12.5523 7.55228 13 7 13ZM7 16.5C6.44772 16.5 6 16.0523 6 15.5C6 14.9477 6.44772 14.5 7 14.5C7.55228 14.5 8 14.9477 8 15.5C8 16.0523 7.55228 16.5 7 16.5Z" fill="currentColor"/>
 </svg>

assets/icons/panel-left.svg

@@ -1,3 +1,3 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none">
-<path d="M2.75 6.75C2.75 5.64543 3.64543 4.75 4.75 4.75H19.25C20.3546 4.75 21.25 5.64543 21.25 6.75V17.25C21.25 18.3546 20.3546 19.25 19.25 19.25H4.75C3.64543 19.25 2.75 18.3546 2.75 17.25V6.75Z" stroke="currentColor" stroke-width="1.5" stroke-linejoin="round"/><path d="M8.25 5V12V19" stroke="currentColor" stroke-width="1.5" stroke-linejoin="round"/>
+<path d="M11.25 4.75H4.75C3.64543 4.75 2.75 5.64543 2.75 6.75V17.25C2.75 18.3546 3.64543 19.25 4.75 19.25H11.25M11.25 4.75H19.25C20.3546 4.75 21.25 5.64543 21.25 6.75V17.25C21.25 18.3546 20.3546 19.25 19.25 19.25H11.25M11.25 4.75V19.25" stroke="currentColor" stroke-width="1.5" stroke-linecap="square" stroke-linejoin="round"/><path d="M6.25 8.5C6.25 8.91421 6.58579 9.25 7 9.25C7.41421 9.25 7.75 8.91421 7.75 8.5C7.75 8.08579 7.41421 7.75 7 7.75C6.58579 7.75 6.25 8.08579 6.25 8.5ZM6.25 12C6.25 12.4142 6.58579 12.75 7 12.75C7.41421 12.75 7.75 12.4142 7.75 12C7.75 11.5858 7.41421 11.25 7 11.25C6.58579 11.25 6.25 11.5858 6.25 12ZM6.25 15.5C6.25 15.9142 6.58579 16.25 7 16.25C7.41421 16.25 7.75 15.9142 7.75 15.5C7.75 15.0858 7.41421 14.75 7 14.75C6.58579 14.75 6.25 15.0858 6.25 15.5Z" fill="currentColor" stroke="currentColor" stroke-width="0.5"/>
 </svg>

crates/auto_update/src/lib.rs

@@ -31,7 +31,7 @@ fn uses_managed_updates() -> bool {
         // Allow opting out of in-app updates via an explicit environment variable.
         || std::env::var(COOP_UPDATE_EXPLANATION).is_ok()
         // The Snap package sets `COOP_BUNDLE_TYPE=snap` (see snapcraft.yaml.in).
-        || std::env::var(COOP_BUNDLE_TYPE).is_ok_and(|value| value == "snap")
+        || std::env::var(COOP_BUNDLE_TYPE).is_ok_and(|value | value == "snap")
 }
 
 /// Initialize the auto-update system.
@@ -129,6 +129,11 @@ impl AutoUpdater {
         matches!(self.status, UpdateStatus::Idle)
     }
 
+    /// Whether the running version is the newest release, so the status line can be hidden.
+    pub fn up_to_date(&self) -> bool {
+        matches!(self.status, UpdateStatus::Idle | UpdateStatus::UpToDate)
+    }
+
     /// Whether a verified update is installed and waiting for a restart.
     pub fn staged(&self) -> bool {
         matches!(self.status, UpdateStatus::Staged(_))

crates/chat/src/lib.rs

@@ -9,7 +9,7 @@ use fuzzy_matcher::FuzzyMatcher;
 use fuzzy_matcher::skim::SkimMatcherV2;
 use gpui::{
     App, AppContext, Context, Entity, EventEmitter, Global, SharedString, Subscription, Task,
-    WeakEntity, Window,
+    WeakEntity,
 };
 use instant::Duration;
 use nostr_sdk::prelude::*;
@@ -37,15 +37,8 @@ impl Global for GlobalChatRegistry {}
 /// Chat event.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub enum ChatEvent {
-    /// An event to open a room by its ID
-    OpenRoom(u64),
-    /// An event to close a room by its ID
-    CloseRoom(u64),
-    /// An event to notify UI about a new chat request
     Ping,
-    /// No Inbox Relays found, the app is not ready to subscribe messages
     InboxRelayNotFound,
-    /// An error occurred
     Error(String),
 }
 
@@ -543,34 +536,16 @@ impl ChatRegistry {
         cx.notify();
     }
 
-    /// Emit an open room event.
+    /// Track a room so it is listed and can be looked up by id.
-    ///
+    pub fn track_room(&mut self, room: &Entity<Room>, cx: &mut Context<Self>) {
-    /// If the room is new, add it to the registry.
-    pub fn emit_room(&mut self, room: &Entity<Room>, window: &mut Window, cx: &mut Context<Self>) {
-        // Get the room's ID.
         let id = room.read(cx).id;
 
-        // If the room is new, add it to the registry and index.
         if let hash_map::Entry::Vacant(e) = self.room_index.entry(id) {
             let entity = room.to_owned();
             e.insert(entity.clone());
+
             self.rooms.insert(0, entity);
-        }
+            cx.notify();
-
-        // Emit the open room event deferred to avoid re-entrant reads
-        cx.defer_in(window, move |_this, _window, cx| {
-            cx.emit(ChatEvent::OpenRoom(id));
-        });
-    }
-
-    /// Close a room.
-    pub fn close_room(&mut self, id: u64, window: &mut Window, cx: &mut Context<Self>) {
-        if self.room_index.contains_key(&id) {
-            self.room_index.remove(&id);
-            self.rooms.retain(|r| r.read(cx).id != id);
-            cx.defer_in(window, move |_this, _window, cx| {
-                cx.emit(ChatEvent::CloseRoom(id));
-            });
         }
     }
 

crates/chat_ui/Cargo.toml

@@ -23,7 +23,4 @@ futures.workspace = true
 log.workspace = true
 serde.workspace = true
 
-linkify = "0.10.0"
-pulldown-cmark = "0.13.1"
 regex = "1"
-

crates/chat_ui/src/lib.rs

@@ -31,13 +31,11 @@ use ui::button::{Button, ButtonVariants};
 use ui::dock::{Panel, PanelEvent};
 use ui::input::{Input, InputEvent, InputState, Textarea, TextareaState};
 use ui::menu::DropdownMenu;
+use ui::message::{MessageRow, WelcomeMessage};
 use ui::notification::Notification;
 use ui::scroll::Scrollbar;
 use ui::tooltip::Tooltip;
-use ui::{
+use ui::{Disableable, Icon, IconName, Sizable, StyledExt, WindowExtension, h_flex, v_flex};
-    Disableable, Icon, IconName, InteractiveElementExt, Sizable, StyledExt, WindowExtension,
-    h_flex, v_flex,
-};
 
 use crate::file::*;
 use crate::text::RenderedText;
@@ -45,6 +43,10 @@ use crate::text::RenderedText;
 const REACTION_EMOJIS: &[&str] = &["👍", "👎", "😄", "🎉", "😕", "❤️", "🚀", "👀"];
 const COMPACT_REACTION_EMOJIS: &[&str] = &["👍", "❤️", "👀"];
 
+/// Notice shown when a conversation has no messages, and above the message list.
+const PRIVATE_NOTICE: &str =
+    "This conversation is private. Only members can see each other's messages.";
+
 /// Regex matching strings that consist entirely of emoji characters,
 /// zero-width joiners, variation selectors, and keycap combiners.
 static EMOJI_RE: LazyLock<Regex> =
@@ -126,9 +128,8 @@ impl ChatPanel {
         let replies_to = cx.new(|_| HashSet::new());
         let reports_by_id = Arc::new(RwLock::new(BTreeMap::new()));
 
-        // Define list of messages
         let messages = Vec::new();
-        let list_state = ListState::new(messages.len(), ListAlignment::Bottom, px(1024.));
+        let list_state = ListState::new(messages.len() + 1, ListAlignment::Bottom, px(1024.));
 
         // Get room id and name
         let (id, name) = room
@@ -577,7 +578,6 @@ impl ChatPanel {
     where
         E: Into<Message>,
     {
-        let old_len = self.messages.len();
         let msg: Message = m.into();
 
         if let Err(pos) = self.messages.binary_search(&msg) {
@@ -586,7 +586,8 @@ impl ChatPanel {
             for (i, message) in self.messages.iter().enumerate().skip(pos) {
                 self.message_index.insert(message.id, i);
             }
-            self.list_state.splice(old_len..old_len, 1);
+            let len = self.list_state.item_count();
+            self.list_state.splice(len..len, 1);
 
             if scroll {
                 self.list_state.scroll_to(ListOffset {
@@ -657,7 +658,8 @@ impl ChatPanel {
     /// Scroll to a message by its ID
     fn scroll_to(&self, id: &EventId) {
         if let Some(ix) = self.messages.iter().position(|msg| &msg.id == id) {
-            self.list_state.scroll_to_reveal_item(ix);
+            // The welcome message occupies the first row, so message rows sit one ahead.
+            self.list_state.scroll_to_reveal_item(ix + 1);
         }
     }
 
@@ -1051,10 +1053,19 @@ impl ChatPanel {
         cx.open_url(&content);
     }
 
-    fn render_announcement(&self, cx: &Context<Self>) -> AnyElement {
+    fn render_welcome(&self, cx: &Context<Self>) -> AnyElement {
-        const MSG: &str =
+        WelcomeMessage::new("welcome")
-            "This conversation is private. Only members can see each other's messages.";
+            .icon(
+                svg()
+                    .path("brand/coop.svg")
+                    .size_12()
+                    .text_color(cx.theme().ghost_element_background_alt),
+            )
+            .message(PRIVATE_NOTICE)
+            .into_any_element()
+    }
 
+    fn render_announcement(&self, cx: &Context<Self>) -> AnyElement {
         v_flex()
             .h_40()
             .w_full()
@@ -1072,7 +1083,7 @@ impl ChatPanel {
                     .size_12()
                     .text_color(cx.theme().ghost_element_active),
             )
-            .child(MSG)
+            .child(PRIVATE_NOTICE)
             .into_any_element()
     }
 
@@ -1141,7 +1152,14 @@ impl ChatPanel {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> AnyElement {
-        let file = self.messages.get(ix).and_then(|message| {
+        if ix == 0 {
+            return self.render_welcome(cx);
+        }
+
+        // The welcome message occupies the first row, so message rows sit one ahead.
+        let index = ix - 1;
+
+        let file = self.messages.get(index).and_then(|message| {
             let file = message.file.clone()?;
             (!self.decrypted_files.contains_key(&message.id) && file.is_image())
                 .then_some((message.id, file))
@@ -1151,14 +1169,14 @@ impl ChatPanel {
             self.load_file(id, file, cx);
         }
 
-        if let Some(message) = self.messages.get(ix) {
+        if let Some(message) = self.messages.get(index) {
             let persons = PersonRegistry::global(cx);
-            let show_author = self.is_group_start(ix);
+            let show_author = self.is_group_start(index);
             let text = self
                 .rendered_texts_by_id
                 .entry(message.id)
                 .or_insert_with(|| {
-                    RenderedText::new(&message.content, &message.mentions, &persons, true, cx)
+                    text::rendered_text(&message.content, &message.mentions, &persons, true, cx)
                 })
                 .element(ix.into(), window, cx);
 
@@ -1188,20 +1206,10 @@ impl ChatPanel {
         // Hide avatar setting
         let hide_avatar = AppSettings::get_hide_avatar(cx);
 
-        div()
+        MessageRow::new(ix)
-            .id(ix)
+            .show_author(show_author)
-            .group("")
+            .hide_avatar(hide_avatar)
-            .relative()
+            .avatar(
-            .w_full()
-            .py_1()
-            .px_3()
-            .child(
-                div()
-                    .flex()
-                    .gap_3()
-                    .when(!hide_avatar, |this| {
-                        if show_author {
-                            this.child(
                 Avatar::new(author.avatar())
                     .seed(author.avatar_seed())
                     .flex_shrink_0()
@@ -1213,28 +1221,10 @@ impl ChatPanel {
                             .menu("View on njump.me", Box::new(Command::Njump(pk)))
                     }),
             )
-                        } else {
+            .author(author.name())
-                            this.child(div().flex_shrink_0().w(px(32.)))
+            .timestamp(message.created_at.to_human_time())
-                        }
-                    })
-                    .child(
-                        v_flex()
-                            .flex_1()
-                            .w_full()
-                            .flex_initial()
-                            .overflow_hidden()
-                            .when(show_author, |this| {
-                                this.child(
-                                    h_flex()
-                                        .gap_2()
-                                        .text_sm()
-                                        .text_color(cx.theme().text_placeholder)
-                                        .child(div().font_semibold().child(author.name()))
-                                        .child(message.created_at.to_human_time())
             .when(has_reports, |this| {
-                                            this.child(self.render_sent_reports(&id, cx))
+                this.header_extra(self.render_sent_reports(&id, cx))
-                                        }),
-                                )
             })
             .when(has_replies, |this| {
                 this.children(self.render_message_replies(replies, cx))
@@ -1246,10 +1236,8 @@ impl ChatPanel {
             })
             .when(has_reactions, |this| {
                 this.child(self.render_reactions(&id, cx))
-                            }),
+            })
-                    ),
+            .overlay(
-            )
-            .child(
                 div()
                     .group_hover("", |this| this.bg(cx.theme().element_active))
                     .absolute()
@@ -1259,7 +1247,7 @@ impl ChatPanel {
                     .h_full()
                     .bg(cx.theme().border_transparent),
             )
-            .child(self.render_actions(&id, &pk, cx))
+            .overlay(self.render_actions(&id, &pk, cx))
             .on_mouse_down(
                 MouseButton::Middle,
                 cx.listener(move |this, _, _window, cx| {
@@ -1269,7 +1257,6 @@ impl ChatPanel {
             .on_double_click(cx.listener(move |this, _, _window, cx| {
                 this.reply_to(&id, cx);
             }))
-            .hover(|this| this.bg(cx.theme().surface_background))
             .into_any_element()
     }
 
@@ -1983,12 +1970,13 @@ impl Panel for ChatPanel {
                 let seed = this.display_image_seed(cx);
 
                 h_flex()
-                    .gap_1p5()
+                    .gap_1()
+                    .text_xs()
                     .child(Avatar::new(picture).seed(seed).xsmall())
                     .child(label)
                     .into_any_element()
             })
-            .unwrap_or(div().child("Unknown").into_any_element())
+            .unwrap_or(div().text_xs().child("Unknown").into_any_element())
     }
 
     fn toolbar_buttons(&self, _window: &Window, _cx: &App) -> Vec<Button> {

crates/chat_ui/src/text.rs

@@ -1,488 +1,28 @@
-use std::ops::Range;
-use std::sync::{Arc, LazyLock};
-
 use chat::Mention;
-use gpui::{
+use gpui::{App, Entity};
-    AnyElement, App, ElementId, Entity, FontStyle, FontWeight, HighlightStyle, InteractiveText,
-    IntoElement, SharedString, StrikethroughStyle, StyledText, UnderlineStyle, Window,
-};
 use person::PersonRegistry;
-use regex::Regex;
+use ui::markdown::InlineReplacement;
-use theme::ActiveTheme;
+pub use ui::markdown::RenderedText;
 
-/// Matches `http://` and `https://` URLs. Only these are treated as clickable links.
+/// Render message `content` to text, replacing mentions with their display names.
-static WEB_URL: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"(?i)^https?://").unwrap());
+///
-
+/// When `markdown` is set the content is parsed as markdown.
-#[allow(clippy::enum_variant_names)]
+pub fn rendered_text(
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum Highlight {
-    Code,
-    InlineCode(bool),
-    Highlight(HighlightStyle),
-    Mention,
-}
-
-impl From<HighlightStyle> for Highlight {
-    fn from(style: HighlightStyle) -> Self {
-        Self::Highlight(style)
-    }
-}
-
-#[derive(Default)]
-pub struct RenderedText {
-    pub text: SharedString,
-    pub highlights: Vec<(Range<usize>, Highlight)>,
-    pub link_ranges: Vec<Range<usize>>,
-    pub link_urls: Arc<[String]>,
-}
-
-impl RenderedText {
-    pub fn new(
     content: &str,
     mentions: &[Mention],
     persons: &Entity<PersonRegistry>,
     markdown: bool,
     cx: &App,
-    ) -> Self {
+) -> RenderedText {
-        Self::render(content, mentions, markdown, |mention| {
+    let replacements = mentions
-            format!("@{}", persons.read(cx).get(&mention.public_key, cx).name())
+        .iter()
+        .map(|mention| {
+            InlineReplacement::new(
+                mention.range.clone(),
+                format!("@{}", persons.read(cx).get(&mention.public_key, cx).name()),
+            )
         })
-    }
+        .collect::<Vec<_>>();
 
-    fn render(
+    RenderedText::new(content, &replacements, markdown)
-        content: &str,
-        mentions: &[Mention],
-        markdown: bool,
-        resolve_mention: impl Fn(&Mention) -> String,
-    ) -> Self {
-        let mut text = String::new();
-        let mut highlights = Vec::new();
-        let mut link_ranges = Vec::new();
-        let mut link_urls = Vec::new();
-
-        render_text_mut(
-            content,
-            mentions,
-            &mut text,
-            &mut highlights,
-            &mut link_ranges,
-            &mut link_urls,
-            markdown,
-            resolve_mention,
-        );
-
-        // Trim trailing whitespace and adjust highlight and link ranges.
-        let trimmed_len = text.trim_end().len();
-
-        // Retain highlights and link ranges that are within the trimmed text.
-        if trimmed_len < text.len() {
-            highlights.retain_mut(|(range, _)| {
-                range.end = range.end.min(trimmed_len);
-                range.start < range.end
-            });
-
-            let mut ix = 0;
-
-            while ix < link_ranges.len() {
-                let range = &mut link_ranges[ix];
-                range.end = range.end.min(trimmed_len);
-                if range.start < range.end {
-                    ix += 1;
-                } else {
-                    link_ranges.remove(ix);
-                    link_urls.remove(ix);
-                }
-            }
-
-            text.truncate(trimmed_len);
-        }
-
-        RenderedText {
-            text: SharedString::from(text),
-            link_urls: link_urls.into(),
-            link_ranges,
-            highlights,
-        }
-    }
-
-    pub fn element(&self, id: ElementId, window: &Window, cx: &App) -> AnyElement {
-        let code_background = cx.theme().elevated_surface_background;
-        let color = cx.theme().text_accent;
-        let code_font = if cfg!(target_os = "macos") {
-            "Menlo"
-        } else if cfg!(target_os = "windows") {
-            "Consolas"
-        } else {
-            "monospace"
-        };
-
-        InteractiveText::new(
-            id,
-            StyledText::new(self.text.clone())
-                .with_default_highlights(
-                    &window.text_style(),
-                    self.highlights.iter().map(|(range, highlight)| {
-                        (
-                            range.clone(),
-                            match highlight {
-                                Highlight::Code => HighlightStyle {
-                                    background_color: Some(code_background),
-                                    ..Default::default()
-                                },
-                                Highlight::InlineCode(link) => {
-                                    if *link {
-                                        HighlightStyle {
-                                            background_color: Some(code_background),
-                                            underline: Some(UnderlineStyle {
-                                                thickness: 1.0.into(),
-                                                ..Default::default()
-                                            }),
-                                            ..Default::default()
-                                        }
-                                    } else {
-                                        HighlightStyle {
-                                            background_color: Some(code_background),
-                                            ..Default::default()
-                                        }
-                                    }
-                                }
-                                Highlight::Mention => HighlightStyle {
-                                    color: Some(color),
-                                    underline: Some(UnderlineStyle {
-                                        thickness: 1.0.into(),
-                                        ..Default::default()
-                                    }),
-                                    ..Default::default()
-                                },
-                                Highlight::Highlight(highlight) => *highlight,
-                            },
-                        )
-                    }),
-                )
-                .with_font_family_overrides(self.highlights.iter().filter_map(
-                    |(range, highlight)| match highlight {
-                        Highlight::Code | Highlight::InlineCode(_) => {
-                            Some((range.clone(), code_font.into()))
-                        }
-                        _ => None,
-                    },
-                )),
-        )
-        .on_click(self.link_ranges.clone(), {
-            let link_urls = self.link_urls.clone();
-            move |ix, _, cx| {
-                let url = &link_urls[ix];
-                if WEB_URL.is_match(url) {
-                    cx.open_url(url);
-                }
-            }
-        })
-        .into_any_element()
-    }
-}
-
-#[allow(clippy::too_many_arguments)]
-fn render_text_mut(
-    block: &str,
-    mut mentions: &[Mention],
-    text: &mut String,
-    highlights: &mut Vec<(Range<usize>, Highlight)>,
-    link_ranges: &mut Vec<Range<usize>>,
-    link_urls: &mut Vec<String>,
-    markdown: bool,
-    resolve_mention: impl Fn(&Mention) -> String,
-) {
-    use pulldown_cmark::{Event, Options, Parser, Tag, TagEnd};
-
-    let mut bold_depth = 0;
-    let mut italic_depth = 0;
-    let mut strikethrough_depth = 0;
-    let mut link_url = None;
-    let mut list_stack = Vec::new();
-    let mut code_block = false;
-
-    // Only enable the extensions that make sense for chat messages. Notably this leaves
-    // out smart punctuation, tables, math and footnotes: they rewrite or swallow text.
-    let events: Box<dyn Iterator<Item = (Event<'_>, Range<usize>)> + '_> = if markdown {
-        Box::new(Parser::new_ext(block, Options::ENABLE_STRIKETHROUGH).into_offset_iter())
-    } else {
-        Box::new(std::iter::once((Event::Text(block.into()), 0..block.len())))
-    };
-
-    for (event, source_range) in events {
-        let prev_len = text.len();
-
-        match event {
-            Event::Text(t) => {
-                if code_block {
-                    text.push_str(t.as_ref());
-                    highlights.push((prev_len..text.len(), Highlight::Code));
-                    continue;
-                }
-
-                let t_str = t.as_ref();
-                let mut last_processed = 0;
-
-                while let Some(mention) = mentions.first() {
-                    if mention.range.start >= source_range.end {
-                        break;
-                    }
-
-                    mentions = &mentions[1..];
-                    if mention.range.start < source_range.start
-                        || mention.range.end > source_range.end
-                    {
-                        continue;
-                    }
-
-                    let Some(token) = block.get(mention.range.clone()) else {
-                        continue;
-                    };
-
-                    let Some(offset) = t_str[last_processed..].find(token) else {
-                        continue;
-                    };
-
-                    let mention_start_in_text = last_processed + offset;
-                    let mention_end_in_text = mention_start_in_text + token.len();
-
-                    // Add text before this mention
-                    if mention_start_in_text > last_processed {
-                        let before_mention = &t_str[last_processed..mention_start_in_text];
-                        process_text_segment(
-                            before_mention,
-                            bold_depth,
-                            italic_depth,
-                            strikethrough_depth,
-                            link_url.clone(),
-                            text,
-                            highlights,
-                            link_ranges,
-                            link_urls,
-                        );
-                    }
-
-                    // Process the mention replacement
-                    let replacement_text = resolve_mention(mention);
-                    let replacement_start = text.len();
-                    text.push_str(&replacement_text);
-                    let replacement_end = text.len();
-
-                    highlights.push((replacement_start..replacement_end, Highlight::Mention));
-
-                    last_processed = mention_end_in_text;
-                }
-
-                // Add any remaining text after the last mention
-                if last_processed < t_str.len() {
-                    let remaining_text = &t_str[last_processed..];
-                    process_text_segment(
-                        remaining_text,
-                        bold_depth,
-                        italic_depth,
-                        strikethrough_depth,
-                        link_url.clone(),
-                        text,
-                        highlights,
-                        link_ranges,
-                        link_urls,
-                    );
-                }
-            }
-            Event::Code(t) => {
-                text.push_str(t.as_ref());
-                let is_link = link_url.is_some();
-
-                if let Some(link_url) = link_url.clone() {
-                    link_ranges.push(prev_len..text.len());
-                    link_urls.push(link_url);
-                }
-
-                highlights.push((prev_len..text.len(), Highlight::InlineCode(is_link)))
-            }
-            Event::Start(tag) => match tag {
-                Tag::Paragraph => new_paragraph(text, &mut list_stack),
-                Tag::Heading { .. } => {
-                    new_paragraph(text, &mut list_stack);
-                    bold_depth += 1;
-                }
-                Tag::CodeBlock(_kind) => {
-                    new_paragraph(text, &mut list_stack);
-                    code_block = true;
-                }
-                Tag::Emphasis => italic_depth += 1,
-                Tag::Strong => bold_depth += 1,
-                Tag::Strikethrough => strikethrough_depth += 1,
-                Tag::Link { dest_url, .. } => {
-                    link_url = WEB_URL.is_match(&dest_url).then(|| dest_url.to_string());
-                }
-                Tag::List(number) => {
-                    list_stack.push((number, false));
-                }
-                Tag::Item => {
-                    let len = list_stack.len();
-                    if let Some((list_number, has_content)) = list_stack.last_mut() {
-                        *has_content = false;
-                        if !text.is_empty() && !text.ends_with('\n') {
-                            text.push('\n');
-                        }
-                        for _ in 0..len - 1 {
-                            text.push_str("  ");
-                        }
-                        if let Some(number) = list_number {
-                            text.push_str(&format!("{}. ", number));
-                            *number += 1;
-                            *has_content = false;
-                        } else {
-                            text.push_str("- ");
-                        }
-                    }
-                }
-                _ => {}
-            },
-            Event::End(tag) => match tag {
-                TagEnd::CodeBlock => code_block = false,
-                TagEnd::Heading(_) => bold_depth -= 1,
-                TagEnd::Emphasis => italic_depth -= 1,
-                TagEnd::Strong => bold_depth -= 1,
-                TagEnd::Strikethrough => strikethrough_depth -= 1,
-                TagEnd::Link => link_url = None,
-                TagEnd::List(_) => drop(list_stack.pop()),
-                _ => {}
-            },
-            Event::Html(t) | Event::InlineHtml(t) => text.push_str(t.as_ref()),
-            Event::Rule => {
-                new_paragraph(text, &mut list_stack);
-                text.push_str("────────\n");
-            }
-            Event::HardBreak => text.push('\n'),
-            Event::SoftBreak => text.push('\n'),
-            _ => {}
-        }
-    }
-}
-
-#[allow(clippy::too_many_arguments)]
-fn process_text_segment(
-    segment: &str,
-    bold_depth: i32,
-    italic_depth: i32,
-    strikethrough_depth: i32,
-    link_url: Option<String>,
-    text: &mut String,
-    highlights: &mut Vec<(Range<usize>, Highlight)>,
-    link_ranges: &mut Vec<Range<usize>>,
-    link_urls: &mut Vec<String>,
-) {
-    // Build the style for this segment
-    let mut style = HighlightStyle::default();
-    if bold_depth > 0 {
-        style.font_weight = Some(FontWeight::BOLD);
-    }
-    if italic_depth > 0 {
-        style.font_style = Some(FontStyle::Italic);
-    }
-    if strikethrough_depth > 0 {
-        style.strikethrough = Some(StrikethroughStyle {
-            thickness: 1.0.into(),
-            ..Default::default()
-        });
-    }
-
-    // Ranges always refer to the rendered text, including replaced mentions.
-    let segment_start = text.len();
-    text.push_str(segment);
-    let text_end = text.len();
-
-    if let Some(link_url) = link_url {
-        // Handle as a markdown link
-        link_ranges.push(segment_start..text_end);
-        link_urls.push(link_url);
-        style.underline = Some(UnderlineStyle {
-            thickness: 1.0.into(),
-            ..Default::default()
-        });
-
-        // Add highlight for the entire linked segment
-        if style != HighlightStyle::default() {
-            highlights.push((segment_start..text_end, Highlight::Highlight(style)));
-        }
-    } else {
-        // Handle link detection within the segment
-        let mut finder = linkify::LinkFinder::new();
-        finder.kinds(&[linkify::LinkKind::Url]);
-        let mut last_link_pos = 0;
-
-        for link in finder
-            .links(segment)
-            .filter(|link| WEB_URL.is_match(link.as_str()))
-        {
-            let start = link.start();
-            let end = link.end();
-
-            // Add non-link text before this link
-            if start > last_link_pos {
-                let non_link_start = segment_start + last_link_pos;
-                let non_link_end = segment_start + start;
-
-                if style != HighlightStyle::default() {
-                    highlights.push((non_link_start..non_link_end, Highlight::Highlight(style)));
-                }
-            }
-
-            // Add the link
-            let range = (segment_start + start)..(segment_start + end);
-            link_ranges.push(range.clone());
-            link_urls.push(link.as_str().to_string());
-
-            // Apply link styling (underline + existing style)
-            let mut link_style = style;
-            link_style.underline = Some(UnderlineStyle {
-                thickness: 1.0.into(),
-                ..Default::default()
-            });
-
-            highlights.push((range, Highlight::Highlight(link_style)));
-
-            last_link_pos = end;
-        }
-
-        // Add any remaining text after the last link
-        if last_link_pos < segment.len() {
-            let remaining_start = segment_start + last_link_pos;
-            let remaining_end = segment_start + segment.len();
-
-            if style != HighlightStyle::default() {
-                highlights.push((remaining_start..remaining_end, Highlight::Highlight(style)));
-            }
-        }
-    }
-}
-
-fn new_paragraph(text: &mut String, list_stack: &mut [(Option<u64>, bool)]) {
-    let mut is_subsequent_paragraph_of_list = false;
-
-    if let Some((_, has_content)) = list_stack.last_mut() {
-        if *has_content {
-            is_subsequent_paragraph_of_list = true;
-        } else {
-            *has_content = true;
-            return;
-        }
-    }
-
-    if !text.is_empty() {
-        if !text.ends_with('\n') {
-            text.push('\n');
-        }
-        text.push('\n');
-    }
-
-    for _ in 0..list_stack.len().saturating_sub(1) {
-        text.push_str("  ");
-    }
-
-    if is_subsequent_paragraph_of_list {
-        text.push_str("  ");
-    }
 }

crates/community/src/community.rs

@@ -11,7 +11,7 @@ use concord::cord06::RekeyScope;
 use concord::derive::{channel_group_key, grant_locator};
 use concord::state::{ChannelCursor, ChannelKeyRef, CommunityState, HeldKey, HeldRoot};
 use concord::{ChannelId, CommunityId, Epoch};
-use gpui::{App, AppContext, Context, EventEmitter, Task};
+use gpui::{App, AppContext, Context, EventEmitter, SharedString, Task};
 use nostr_sdk::prelude::*;
 use smallvec::{SmallVec, smallvec};
 use state::NostrRegistry;
@@ -107,8 +107,6 @@ impl SubscriptionKey {
 #[derive(Debug, Clone)]
 pub enum CommunityEvent {
     Updated(CommunityId),
-    Open(CommunityId),
-    Close(CommunityId),
     Channel(CommunityId, ChannelId),
     /// History exists here that no held key can open.
     Unreadable(CommunityId),
@@ -180,15 +178,16 @@ impl Community {
         &self.state
     }
 
-    pub fn name(&self) -> String {
+    pub fn name(&self) -> SharedString {
         if let Some(metadata) = &self.control.community {
-            return metadata.name.clone();
+            return SharedString::from(&metadata.name);
         }
 
         self.state
             .name
-            .clone()
+            .as_ref()
-            .unwrap_or_else(|| self.state.id.to_hex())
+            .map(SharedString::from)
+            .unwrap_or_else(|| SharedString::from("Unknown"))
     }
 
     pub fn control(&self) -> &ControlFold {

crates/community/src/lib.rs

@@ -7,7 +7,7 @@ pub use concord::cord03::{ChatMessage, ReplyRef};
 use concord::state::CommunityState;
 pub use concord::{ChannelId, CommunityId, Epoch};
 use futures::future::{Either, select};
-use gpui::{App, AppContext, Context, Entity, EventEmitter, Global, Subscription, Task, Window};
+use gpui::{App, AppContext, Context, Entity, EventEmitter, Global, Subscription, Task};
 use nostr_sdk::prelude::*;
 use smallvec::{SmallVec, smallvec};
 use state::NostrRegistry;
@@ -225,27 +225,6 @@ impl CommunityRegistry {
         self.index.get(id).cloned()
     }
 
-    /// Ask the workspace to open a community's panel.
-    pub fn emit_community(
-        &mut self,
-        community: &Entity<Community>,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) {
-        let id = community.read(cx).id();
-
-        cx.defer_in(window, move |_this, _window, cx| {
-            cx.emit(CommunityEvent::Open(id));
-        });
-    }
-
-    /// Ask the workspace to close a community's panel.
-    pub fn emit_close(&mut self, id: CommunityId, window: &mut Window, cx: &mut Context<Self>) {
-        cx.defer_in(window, move |_this, _window, cx| {
-            cx.emit(CommunityEvent::Close(id));
-        });
-    }
-
     /// Create a community owned by the current account and begin tracking it.
     pub fn create(&mut self, metadata: CommunityMetadata, cx: &mut Context<Self>) {
         let nostr = NostrRegistry::global(cx);

crates/community_ui/src/lib.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 use std::fmt;
 
 use anyhow::Result;
@@ -19,6 +19,8 @@ use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{Panel, PanelEvent};
 use ui::input::{InputEvent, Textarea, TextareaState};
+use ui::markdown::RenderedText;
+use ui::message::WelcomeMessage;
 use ui::notification::Notification;
 use ui::scroll::Scrollbar;
 use ui::{Disableable, IconName, Sizable, WindowExtension, h_flex, v_flex};
@@ -97,6 +99,8 @@ pub struct CommunityPanel {
     channel: Option<ChannelId>,
     /// The selected channel's timeline (oldest first)
     rows: Vec<ChatMessage>,
+    /// Rendered markdown content, keyed by message id and dropped when a row changes
+    rendered_texts_by_id: BTreeMap<EventId, RenderedText>,
     /// Whether the store holds rows older than `rows`
     has_more: bool,
     /// A round or a page read is in flight
@@ -145,53 +149,49 @@ impl CommunityPanel {
             window,
             |_this, _community, event, window, cx| {
                 match event {
-                    CommunityEvent::Updated(_)
-                    | CommunityEvent::Unreadable(_)
-                    | CommunityEvent::Failed(_) => {
-                        cx.defer_in(window, |this, window, cx| this.reload(window, cx));
-                    }
                     CommunityEvent::Channel(..) => {
-                        cx.defer_in(window, |this, window, cx| this.load(window, cx));
+                        cx.defer_in(window, |this, window, cx| {
+                            this.load(window, cx);
+                        });
                     }
                     CommunityEvent::Error(error) => {
-                        window.push_notification(
+                        window.push_notification(Notification::error(error.clone()), cx);
-                            Notification::error(error.clone()).autohide(false),
+                    }
-                            cx,
+                    _ => {
-                        );
+                        cx.defer_in(window, |this, window, cx| {
+                            this.reload(window, cx);
+                        });
                     }
-                    CommunityEvent::Open(_) | CommunityEvent::Close(_) => {}
                 };
             },
         ));
 
-        let panel = Self {
+        cx.defer_in(window, |this, window, cx| {
-            id,
+            this.list_state.set_follow_mode(FollowMode::Tail);
-            focus_handle: cx.focus_handle(),
+            this.list_state.set_scroll_handler(cx.listener(
-            community: community.downgrade(),
-            channel,
-            rows: Vec::new(),
-            has_more: false,
-            loading: false,
-            list_state: ListState::new(0, ListAlignment::Bottom, px(1024.)),
-            input,
-            tasks: smallvec![],
-            _subscriptions: subscriptions,
-        };
-
-        panel.list_state.set_follow_mode(FollowMode::Tail);
-        panel.list_state.set_scroll_handler(cx.listener(
                 |this, event: &ListScrollEvent, window, cx| {
                     if event.visible_range.start <= LOAD_OLDER_THRESHOLD {
                         this.load_older(window, cx);
                     }
                 },
             ));
-
-        cx.defer_in(window, |this, window, cx| {
             this.load(window, cx);
         });
 
-        panel
+        Self {
+            id,
+            focus_handle: cx.focus_handle(),
+            community: community.downgrade(),
+            channel,
+            rows: Vec::new(),
+            rendered_texts_by_id: BTreeMap::new(),
+            has_more: false,
+            loading: false,
+            list_state: ListState::new(0, ListAlignment::Bottom, px(1024.)),
+            input,
+            tasks: smallvec![],
+            _subscriptions: subscriptions,
+        }
     }
 
     /// The channel to show, following the community's selection.
@@ -205,17 +205,18 @@ impl CommunityPanel {
         if channel != self.channel {
             self.channel = channel;
             self.rows.clear();
+            self.rendered_texts_by_id.clear();
             self.has_more = false;
             self.loading = false;
-            self.list_state.reset(1);
+            self.list_state.reset(2);
         }
 
         channel
     }
 
-    /// The list's item count: the load-older row, then every message row.
+    /// The list's item count: the welcome row, the load-older row, then every message row.
     fn item_count(&self) -> usize {
-        self.rows.len() + 1
+        self.rows.len() + 2
     }
 
     /// A timeline read, `before_ms` exclusive, or `None` for the newest rows.
@@ -494,6 +495,7 @@ impl CommunityPanel {
 
         if !connected {
             self.rows = messages;
+            self.rendered_texts_by_id.clear();
             self.has_more = has_more;
             self.list_state.reset(self.item_count());
             cx.notify();
@@ -528,7 +530,13 @@ impl CommunityPanel {
 
         for message in messages {
             match shown.get(&message.id).copied() {
-                Some(ix) => self.rows[ix] = message,
+                Some(ix) => {
+                    // Drop the cached render when the text changes, so edits re-parse.
+                    if self.rows[ix].content != message.content {
+                        self.rendered_texts_by_id.remove(&message.id);
+                    }
+                    self.rows[ix] = message;
+                }
                 None => fresh.push(message),
             }
         }
@@ -544,7 +552,8 @@ impl CommunityPanel {
 
             shown.insert(message.id, at);
             self.rows.insert(at, message);
-            self.list_state.splice(at + 1..at + 1, 1);
+            // The welcome and load-older rows sit above the messages.
+            self.list_state.splice(at + 2..at + 2, 1);
         }
     }
 
@@ -626,7 +635,29 @@ impl CommunityPanel {
             .into_any_element()
     }
 
-    /// The row at index 0: the affordance that pages older history in.
+    /// The row at index 0: the welcome message for the channel.
+    fn render_welcome(&self, cx: &Context<Self>) -> AnyElement {
+        let (name, avatar) = self
+            .community
+            .read_with(cx, |community, _cx| {
+                let seed = community.id().to_hex();
+                let avatar = match community.icon() {
+                    Some(path) => Avatar::from_source(path).seed(seed).large(),
+                    None => Avatar::new(None).seed(seed).large(),
+                };
+
+                (community.name(), avatar)
+            })
+            .unwrap_or_else(|_| (SharedString::from("this community"), Avatar::new(None)));
+
+        WelcomeMessage::new("welcome")
+            .icon(avatar)
+            .title(format!("Welcome to {}", name))
+            .message(format!("This is the start of the {} channel.", name))
+            .into_any_element()
+    }
+
+    /// The row at index 1: the affordance that pages older history in.
     fn render_older(&self, cx: &mut Context<Self>) -> AnyElement {
         if !self.has_more {
             return div().into_any_element();
@@ -668,20 +699,34 @@ impl CommunityPanel {
     fn render_message(
         &mut self,
         ix: usize,
-        _window: &mut Window,
+        window: &mut Window,
         cx: &mut Context<Self>,
     ) -> AnyElement {
         if ix == 0 {
+            return self.render_welcome(cx);
+        }
+
+        if ix == 1 {
             return self.render_older(cx);
         }
 
-        let Some(message) = self.rows.get(ix - 1) else {
+        // The welcome and load-older rows sit above the messages.
+        let Some(message) = self.rows.get(ix - 2) else {
             return div().into_any_element();
         };
 
-        let show_author = self.opens_run(ix - 1);
+        let show_author = self.opens_run(ix - 2);
 
-        message::render(ix, message, show_author, cx)
+        let content = if message.deleted {
+            message::deleted(cx)
+        } else {
+            self.rendered_texts_by_id
+                .entry(message.id)
+                .or_insert_with(|| RenderedText::new(&message.content, &[], true))
+                .element(ix.into(), window, cx)
+        };
+
+        message::render(ix, message, content, show_author, cx)
     }
 
     fn render_composer(&self, cx: &mut Context<Self>) -> impl IntoElement {
@@ -723,12 +768,13 @@ impl Panel for CommunityPanel {
                 };
 
                 h_flex()
-                    .gap_1p5()
+                    .gap_1()
+                    .text_xs()
                     .child(avatar)
-                    .child(SharedString::from(community.name()))
+                    .child(community.name())
                     .into_any_element()
             })
-            .unwrap_or_else(|_| div().child("Unknown").into_any_element())
+            .unwrap_or_else(|_| div().text_xs().child("Unknown").into_any_element())
     }
 
     fn toolbar_buttons(&self, _window: &Window, _cx: &App) -> Vec<Button> {

crates/community_ui/src/message.rs

@@ -3,81 +3,51 @@ use std::collections::BTreeMap;
 use common::TimestampExt;
 use community::ChatMessage;
 use gpui::prelude::FluentBuilder;
-use gpui::{
+use gpui::{AnyElement, App, IntoElement, ParentElement, SharedString, Styled, div};
-    AnyElement, App, InteractiveElement, IntoElement, ParentElement, SharedString, Styled, div, px,
-};
 use nostr_sdk::prelude::*;
 use person::PersonRegistry;
 use settings::AppSettings;
 use theme::ActiveTheme;
 use ui::avatar::Avatar;
-use ui::{StyledExt, h_flex, v_flex};
+use ui::h_flex;
+use ui::message::MessageRow;
 
-pub(crate) fn render(ix: usize, message: &ChatMessage, show_author: bool, cx: &App) -> AnyElement {
+pub(crate) fn render(
+    ix: usize,
+    message: &ChatMessage,
+    content: AnyElement,
+    show_author: bool,
+    cx: &App,
+) -> AnyElement {
     let persons = PersonRegistry::global(cx);
     let author = persons.read(cx).get(&message.author, cx);
     let hide_avatar = AppSettings::get_hide_avatar(cx);
 
-    div()
+    MessageRow::new(ix)
-        .id(ix)
+        .show_author(show_author)
-        .w_full()
+        .hide_avatar(hide_avatar)
-        .py_1()
+        .avatar(
-        .px_3()
-        .hover(|this| this.bg(cx.theme().surface_background))
-        .child(
-            h_flex()
-                .items_start()
-                .gap_3()
-                .when(!hide_avatar, |this| {
-                    if show_author {
-                        this.child(
             Avatar::new(author.avatar())
                 .seed(author.avatar_seed())
                 .flex_shrink_0(),
         )
-                    } else {
+        .author(author.name())
-                        this.child(div().flex_shrink_0().w(px(32.)))
+        .timestamp(Timestamp::from_secs(message.at_ms / 1000).to_human_time())
-                    }
-                })
-                .child(
-                    v_flex()
-                        .flex_1()
-                        .min_w_0()
-                        .gap_0p5()
-                        .when(show_author, |this| {
-                            this.child(
-                                h_flex()
-                                    .gap_2()
-                                    .text_sm()
-                                    .text_color(cx.theme().text_placeholder)
-                                    .child(div().font_semibold().child(author.name()))
-                                    .child(
-                                        Timestamp::from_secs(message.at_ms / 1000).to_human_time(),
-                                    )
         .when(message.edited_at.is_some(), |this| {
-                                        this.child(div().child("(edited)"))
+            this.header_extra(div().child("(edited)"))
-                                    }),
-                            )
         })
-                        .child(content(message, cx))
+        .child(content)
         .when(!message.reactions.is_empty(), |this| {
             this.child(reactions(message, cx))
-                        }),
+        })
-                ),
-        )
         .into_any_element()
 }
 
-fn content(message: &ChatMessage, cx: &App) -> AnyElement {
+/// The placeholder shown in place of the body of a deleted message.
-    if message.deleted {
+pub(crate) fn deleted(cx: &App) -> AnyElement {
-        return div()
+    div()
         .text_color(cx.theme().text_danger)
         .child("Message deleted")
-            .into_any_element();
-    }
-
-    div()
-        .child(SharedString::from(&message.content))
         .into_any_element()
 }
 

crates/ui/Cargo.toml

@@ -19,5 +19,9 @@ log.workspace = true
 
 uuid = "1.10"
 
+linkify = "0.10.0"
+pulldown-cmark = "0.13.1"
+regex = "1"
+
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 smol.workspace = true

crates/ui/src/avatar.rs

@@ -27,7 +27,7 @@ pub(super) fn avatar_size(size: Size) -> AbsoluteLength {
         Size::Large => px(64.).into(),
         Size::Medium => px(32.).into(),
         Size::Small => px(24.).into(),
-        Size::XSmall => px(20.).into(),
+        Size::XSmall => px(18.).into(),
         Size::Size(size) => size.into(),
     }
 }

crates/ui/src/dock/mod.rs

@@ -5,22 +5,21 @@ use std::sync::Arc;
 
 use gpui::prelude::FluentBuilder as _;
 use gpui::{
-    Anchor, AnyElement, AnyView, App, AppContext as _, Bounds, Context, Div, Empty, Entity,
+    AnyElement, AnyView, App, AppContext as _, Bounds, Context, Div, Empty, Entity,
     GlobalElementId, InspectorElementId, InteractiveElement as _, IntoElement, LayoutId,
     MouseButton, MouseMoveEvent, MouseUpEvent, ParentElement as _, Pixels, Render, ScrollHandle,
     SharedString, Stateful, StatefulInteractiveElement as _, Style, StyleRefinement, Styled as _,
-    WeakEntity, Window, actions, div, px, rems,
+    WeakEntity, Window, actions, div, px,
 };
 pub use gpui_base::dock::{DockArea, DockLayout, DockPlacement};
 use gpui_base::dock::{
     DockAreaRenderer, DockContext, DragPanel, DropIndicator, InsertTarget, NodeId, PaneNode,
-    PaneRef, PanelId, TabGroupContext, TabGroupRenderer, TileContext, TilesRenderer,
+    PaneRef, PanelId, TabGroupContext, TabGroupRenderer,
 };
 use gpui_base::{Placement, ResizeHandleContext, Side};
 use theme::{ActiveTheme, TABBAR_HEIGHT};
 
 use crate::button::{Button, ButtonVariants as _};
-use crate::menu::DropdownMenu as _;
 use crate::resizable::{resize_handle, resize_handle_appearance};
 use crate::tab::Tab;
 use crate::tab::tab_bar::TabBar;
@@ -95,6 +94,19 @@ pub fn add_panel(
     area.add_panel_view(Arc::new(panel), placement, None, window, cx);
 }
 
+/// Add a panel to a dock reached through a weak handle.
+pub fn add_panel_to(
+    dock: &WeakEntity<DockArea>,
+    panel: PanelHandle,
+    placement: DockPlacement,
+    window: &mut Window,
+    cx: &mut App,
+) {
+    let _ = dock.update(cx, |area, cx| {
+        add_panel(area, panel, placement, window, cx);
+    });
+}
+
 /// The panel in any region of `area` whose logical id is `key`.
 fn find_panel(area: &DockArea, key: &SharedString, cx: &App) -> Option<(PanelId, NodeId, usize)> {
     let placements = [
@@ -167,7 +179,6 @@ fn left_top_group(node: &PaneNode) -> Option<NodeId> {
     match node.kind() {
         PaneRef::Tabs { .. } => Some(node.id()),
         PaneRef::Split { children, .. } => children.first().and_then(left_top_group),
-        PaneRef::Tiles { .. } => None,
     }
 }
 
@@ -182,7 +193,6 @@ fn right_top_group(node: &PaneNode) -> Option<NodeId> {
             };
             child.and_then(right_top_group)
         }
-        PaneRef::Tiles { .. } => None,
     }
 }
 
@@ -263,18 +273,6 @@ impl DockAreaRenderer for DockSkin {
     fn tab_group_renderer(&self) -> Rc<dyn TabGroupRenderer> {
         Rc::new(TabGroupSkin::new(self.shared.clone()))
     }
-
-    fn tiles_renderer(&self) -> Rc<dyn TilesRenderer> {
-        Rc::new(NoTiles)
-    }
-}
-
-struct NoTiles;
-
-impl TilesRenderer for NoTiles {
-    fn render_drag_bar(&self, _: &TileContext, _: &mut Window, _: &mut App) -> AnyElement {
-        Empty.into_any_element()
-    }
 }
 
 /// The payload a dock's resize handle drags; the handle is the affordance.
@@ -430,9 +428,6 @@ impl TabGroupSkin {
     }
 
     /// Whether this group is the left dock's root with a single panel.
-    ///
-    /// Such a group draws no tab bar, so its panel owns the window's top-left
-    /// corner — including the space the macOS traffic lights overlay.
     fn is_plain_left_group(&self, group: &TabGroupContext, cx: &App) -> bool {
         let Some(area) = self.shared.area() else {
             return false;
@@ -445,9 +440,6 @@ impl TabGroupSkin {
             && group.panels().len() == 1
     }
 
-    /// Whether this group is the topmost-left group on screen, which sits under
-    /// the native macOS traffic lights. The left dock's group is leftmost while
-    /// it is open and holds a panel; the center's is leftmost otherwise.
     fn is_leftmost_top_group(&self, group: &TabGroupContext, cx: &App) -> bool {
         let Some(area) = self.shared.area() else {
             return false;
@@ -465,172 +457,6 @@ impl TabGroupSkin {
         tree.and_then(|tree| left_top_group(tree.root())) == Some(group.node())
     }
 
-    fn render_toolbar(
-        &self,
-        group: &TabGroupContext,
-        window: &mut Window,
-        cx: &mut App,
-    ) -> impl IntoElement {
-        let zoomed = group.is_zoomed();
-        let closable = group.is_closable();
-        let zoomable = group.active_panel().is_some_and(|panel| panel.zoomable(cx));
-
-        let zoom_label = if zoomed { "Zoom Out" } else { "Zoom In" };
-
-        let buttons = group
-            .active_panel()
-            .and_then(PanelHandle::of)
-            .map(|handle| handle.panel().toolbar_buttons(window, cx))
-            .unwrap_or_default();
-
-        let menu_panel = group
-            .active_panel()
-            .and_then(PanelHandle::of)
-            .map(|handle| handle.panel().clone());
-
-        h_flex()
-            .p_0p5()
-            .gap_1p5()
-            .occlude()
-            .rounded_full()
-            .children(buttons.into_iter().map(|button| button.small().ghost()))
-            .when(zoomed, |this| {
-                this.child(
-                    Button::new("zoom")
-                        .icon(IconName::Zoom)
-                        .small()
-                        .ghost()
-                        .tooltip("Zoom Out")
-                        .on_click({
-                            let group = TabGroupContext::clone(group);
-                            move |_, window, cx| group.toggle_zoom(window, cx)
-                        }),
-                )
-            })
-            .child(
-                Button::new("menu")
-                    .icon(IconName::Ellipsis)
-                    .small()
-                    .ghost()
-                    .dropdown_menu({
-                        move |menu, _, cx| {
-                            let menu = match menu_panel.clone() {
-                                Some(panel) => panel.popup_menu(menu, cx),
-                                None => menu,
-                            };
-
-                            menu.when(zoomable, |this| {
-                                this.separator().menu(zoom_label, Box::new(ToggleZoom))
-                            })
-                            .when(closable, |this| {
-                                this.separator().menu("Close", Box::new(ClosePanel))
-                            })
-                        }
-                    })
-                    .anchor(Anchor::TopRight),
-            )
-    }
-
-    fn render_title(
-        &self,
-        group: &TabGroupContext,
-        ix: usize,
-        window: &mut Window,
-        cx: &mut App,
-    ) -> AnyElement {
-        let panel = group.panels()[ix].clone();
-        let left_button = self.dock_toggle_button(DockPlacement::Left, group, cx);
-        let bottom_button = self.dock_toggle_button(DockPlacement::Bottom, group, cx);
-        let right_button = self.dock_toggle_button(DockPlacement::Right, group, cx);
-        let has_leading = left_button.is_some() || bottom_button.is_some();
-        let drag = tab_drag(group, ix, cx);
-        let is_title_bar = self.is_title_bar_group(group, cx);
-        let needs_traffic_light_padding =
-            cfg!(target_os = "macos") && self.is_leftmost_top_group(group, cx);
-        let trailing_chrome = is_title_bar
-            .then(|| self.shared.chrome.trailing(window, cx))
-            .flatten();
-
-        let bar = h_flex()
-            .id("tab-title-bar")
-            .justify_between()
-            .items_center()
-            .line_height(rems(1.0))
-            .h(TABBAR_HEIGHT)
-            .bg(cx.theme().panel_background)
-            .when(left_button.is_some(), |this| this.pl_2())
-            .when(right_button.is_some(), |this| this.pr_2())
-            .when(has_leading, |this| {
-                this.child(
-                    h_flex()
-                        .flex_shrink_0()
-                        .mr_1()
-                        .gap_1()
-                        .children(left_button)
-                        .children(bottom_button),
-                )
-            })
-            .when(needs_traffic_light_padding, |this| {
-                this.pl(px(TRAFFIC_LIGHT_PADDING))
-            })
-            .child(
-                div()
-                    .id("tab")
-                    .flex_initial()
-                    .min_w_0()
-                    .px_2()
-                    .overflow_hidden()
-                    .whitespace_nowrap()
-                    .child(
-                        div()
-                            .w_full()
-                            .text_ellipsis()
-                            .text_sm()
-                            .child(panel_title(&panel, cx)),
-                    )
-                    .when_some(drag, |this, drag| {
-                        this.on_drag(drag, {
-                            let panel = panel.clone();
-                            move |drag, offset, _, cx| {
-                                cx.stop_propagation();
-                                drag.set_drag_offset(offset);
-                                cx.new(|_| DragPreview {
-                                    panel: panel.clone(),
-                                })
-                            }
-                        })
-                    }),
-            )
-            .child({
-                let space = div().id("tab-title-space").flex_1().h_full();
-                if is_title_bar {
-                    title_bar_drag_handlers(space, window, cx).into_any_element()
-                } else {
-                    space.into_any_element()
-                }
-            })
-            .child(
-                h_flex()
-                    .flex_shrink_0()
-                    .ml_1()
-                    .gap_1()
-                    .child(self.render_toolbar(group, window, cx))
-                    .children(right_button),
-            )
-            .when_some(trailing_chrome, |this, chrome| this.child(chrome));
-
-        if is_title_bar {
-            h_flex()
-                .h(TABBAR_HEIGHT)
-                .bg(cx.theme().panel_background)
-                .child(bar.flex_1())
-                .child(window_controls())
-                .into_any_element()
-        } else {
-            bar.into_any_element()
-        }
-    }
-
     fn render_tabs(
         &self,
         group: &TabGroupContext,
@@ -642,9 +468,12 @@ impl TabGroupSkin {
         let bottom_button = self.dock_toggle_button(DockPlacement::Bottom, group, cx);
         let right_button = self.dock_toggle_button(DockPlacement::Right, group, cx);
         let has_leading = left_button.is_some() || bottom_button.is_some();
+
         let collapsed = group.is_collapsed();
         let droppable = group.is_droppable();
         let tabs_count = group.panels().len();
+        let is_title_bar = self.is_title_bar_group(group, cx);
+
         let displayed = group.active_panel().map(|panel| panel.panel_id(cx));
         let displayed_ix = displayed.and_then(|displayed| {
             group
@@ -652,12 +481,14 @@ impl TabGroupSkin {
                 .iter()
                 .position(|panel| panel.panel_id(cx) == displayed)
         });
-        let is_title_bar = self.is_title_bar_group(group, cx);
+
         let needs_traffic_light_padding =
             cfg!(target_os = "macos") && self.is_leftmost_top_group(group, cx);
+
         let trailing_chrome = is_title_bar
             .then(|| self.shared.chrome.trailing(window, cx))
             .flatten();
+
         let empty_space = div()
             .id("tab-bar-empty-space")
             .h_full()
@@ -673,6 +504,7 @@ impl TabGroupSkin {
                         }
                     })
             });
+
         let empty_space = if is_title_bar {
             title_bar_drag_handlers(empty_space, window, cx).into_any_element()
         } else {
@@ -689,7 +521,9 @@ impl TabGroupSkin {
             .when(is_title_bar || has_leading, |this| {
                 this.prefix(
                     h_flex()
-                        .items_center()
+                        .size(TABBAR_HEIGHT)
+                        .flex_shrink_0()
+                        .justify_center()
                         .top_0()
                         .right(-px(1.))
                         .pl_0p5()
@@ -767,13 +601,13 @@ impl TabGroupSkin {
             .when(!collapsed, |this| {
                 this.suffix(
                     h_flex()
+                        .flex_shrink_0()
                         .items_center()
                         .top_0()
                         .right_0()
                         .h_full()
                         .px_0p5()
                         .gap_1()
-                        .child(self.render_toolbar(group, window, cx))
                         .children(right_button)
                         .children(trailing_chrome),
                 )
@@ -846,7 +680,13 @@ impl TabGroupSkin {
                 .small()
                 .ghost()
                 .tab_stop(false)
-                .tooltip(if is_open { "Collapse" } else { "Expand" })
+                .map(|this| {
+                    if is_open {
+                        this.tooltip("Collapse")
+                    } else {
+                        this.tooltip("Expand")
+                    }
+                })
                 .on_click(move |_, window, cx| {
                     area.update(cx, |area, cx| area.toggle_dock(placement, window, cx));
                 }),
@@ -901,13 +741,11 @@ impl TabGroupRenderer for TabGroupSkin {
             self.scroll_handle.scroll_to_item(visible_ix);
         }
 
-        match visible.as_slice() {
+        if visible.is_empty() {
-            [] => Empty.into_any_element(),
+            return Empty.into_any_element();
-            // One panel in a group that is not asking for tabs gets the title
-            // instead of a tab bar.
-            [ix] => self.render_title(group, *ix, window, cx),
-            _ => self.render_tabs(group, visible.as_slice(), window, cx),
         }
+
+        self.render_tabs(group, visible.as_slice(), window, cx)
     }
 
     fn render_active_panel(

crates/ui/src/dock/panel.rs

@@ -19,9 +19,6 @@ pub enum PanelEvent {
 
 pub trait Panel: EventEmitter<PanelEvent> + Render + Focusable {
     /// The name of the panel used to serialize, deserialize and identify the panel.
-    ///
-    /// This is used to identify the panel when deserializing the panel.
-    /// Once you have defined a panel id, this must not be changed.
     fn panel_id(&self) -> SharedString;
 
     /// The title of the panel

crates/ui/src/icon.rs

@@ -22,6 +22,7 @@ impl<T: IconNamed> From<T> for Icon {
 pub enum IconName {
     ArrowLeft,
     ArrowRight,
+    ArrowDownCircle,
     Boom,
     Book,
     ChevronDown,
@@ -66,6 +67,7 @@ pub enum IconName {
     Ship,
     Shield,
     Group,
+    Hashtag,
     History,
     UserKey,
     Upload,
@@ -99,6 +101,7 @@ impl IconNamed for IconName {
         match self {
             Self::ArrowLeft => "icons/arrow-left.svg",
             Self::ArrowRight => "icons/arrow-right.svg",
+            Self::ArrowDownCircle => "icons/arrow-down-circle.svg",
             Self::Boom => "icons/boom.svg",
             Self::Book => "icons/book.svg",
             Self::ChevronDown => "icons/chevron-down.svg",
@@ -146,6 +149,7 @@ impl IconNamed for IconName {
             Self::Upload => "icons/upload.svg",
             Self::Usb => "icons/usb.svg",
             Self::Group => "icons/group.svg",
+            Self::Hashtag => "icons/hashtag.svg",
             Self::History => "icons/history.svg",
             Self::PanelLeft => "icons/panel-left.svg",
             Self::PanelLeftOpen => "icons/panel-left-open.svg",

crates/ui/src/lib.rs

@@ -16,8 +16,11 @@ pub mod dock;
 pub mod group_box;
 pub mod indicator;
 pub mod input;
+pub mod markdown;
 pub mod menu;
+pub mod message;
 pub mod modal;
+pub mod nav;
 pub mod nav_item;
 pub mod notification;
 pub mod popover;

crates/ui/src/markdown.rs

@@ -0,0 +1,491 @@
+use std::ops::Range;
+use std::sync::{Arc, LazyLock};
+
+use gpui::{
+    AnyElement, App, ElementId, FontStyle, FontWeight, HighlightStyle, InteractiveText,
+    IntoElement, SharedString, StrikethroughStyle, StyledText, UnderlineStyle, Window,
+};
+use regex::Regex;
+use theme::ActiveTheme;
+
+/// Matches `http://` and `https://` URLs. Only these are treated as clickable links.
+static WEB_URL: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"(?i)^https?://").unwrap());
+
+/// A span of the source content, by byte range, that renders as `text` instead.
+///
+/// Replacements are resolved before rendering and styled as an accent-colored
+/// link. Mentions are one use: callers resolve the public key to a display name
+/// and hand the renderer the span to substitute. They must be sorted by
+/// `range.start` and must not overlap.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct InlineReplacement {
+    pub range: Range<usize>,
+    pub text: SharedString,
+}
+
+impl InlineReplacement {
+    pub fn new(range: Range<usize>, text: impl Into<SharedString>) -> Self {
+        Self {
+            range,
+            text: text.into(),
+        }
+    }
+}
+
+#[allow(clippy::enum_variant_names)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Highlight {
+    Code,
+    InlineCode(bool),
+    Replacement,
+    Style(HighlightStyle),
+}
+
+impl From<HighlightStyle> for Highlight {
+    fn from(style: HighlightStyle) -> Self {
+        Self::Style(style)
+    }
+}
+
+/// Message content flattened into a single styled string.
+///
+/// Markdown structure (headings, lists, code blocks, emphasis, links) is turned
+/// into plain text plus highlight ranges, ready to hand to an `InteractiveText`.
+#[derive(Default)]
+pub struct RenderedText {
+    pub text: SharedString,
+    pub highlights: Vec<(Range<usize>, Highlight)>,
+    pub link_ranges: Vec<Range<usize>>,
+    pub link_urls: Arc<[String]>,
+}
+
+impl RenderedText {
+    /// Parse `content`, optionally as markdown, replacing `replacements` inline.
+    pub fn new(content: &str, replacements: &[InlineReplacement], markdown: bool) -> Self {
+        let mut text = String::new();
+        let mut highlights = Vec::new();
+        let mut link_ranges = Vec::new();
+        let mut link_urls = Vec::new();
+
+        render_text_mut(
+            content,
+            replacements,
+            &mut text,
+            &mut highlights,
+            &mut link_ranges,
+            &mut link_urls,
+            markdown,
+        );
+
+        // Trim trailing whitespace and adjust highlight and link ranges.
+        let trimmed_len = text.trim_end().len();
+
+        // Retain highlights and link ranges that are within the trimmed text.
+        if trimmed_len < text.len() {
+            highlights.retain_mut(|(range, _)| {
+                range.end = range.end.min(trimmed_len);
+                range.start < range.end
+            });
+
+            let mut ix = 0;
+
+            while ix < link_ranges.len() {
+                let range = &mut link_ranges[ix];
+                range.end = range.end.min(trimmed_len);
+                if range.start < range.end {
+                    ix += 1;
+                } else {
+                    link_ranges.remove(ix);
+                    link_urls.remove(ix);
+                }
+            }
+
+            text.truncate(trimmed_len);
+        }
+
+        RenderedText {
+            text: SharedString::from(text),
+            link_urls: link_urls.into(),
+            link_ranges,
+            highlights,
+        }
+    }
+
+    pub fn element(&self, id: ElementId, window: &Window, cx: &App) -> AnyElement {
+        let code_background = cx.theme().elevated_surface_background;
+        let color = cx.theme().text_accent;
+        let code_font = if cfg!(target_os = "macos") {
+            "Menlo"
+        } else if cfg!(target_os = "windows") {
+            "Consolas"
+        } else {
+            "monospace"
+        };
+
+        InteractiveText::new(
+            id,
+            StyledText::new(self.text.clone())
+                .with_default_highlights(
+                    &window.text_style(),
+                    self.highlights.iter().map(|(range, highlight)| {
+                        (
+                            range.clone(),
+                            match highlight {
+                                Highlight::Code => HighlightStyle {
+                                    background_color: Some(code_background),
+                                    ..Default::default()
+                                },
+                                Highlight::InlineCode(link) => {
+                                    if *link {
+                                        HighlightStyle {
+                                            background_color: Some(code_background),
+                                            underline: Some(UnderlineStyle {
+                                                thickness: 1.0.into(),
+                                                ..Default::default()
+                                            }),
+                                            ..Default::default()
+                                        }
+                                    } else {
+                                        HighlightStyle {
+                                            background_color: Some(code_background),
+                                            ..Default::default()
+                                        }
+                                    }
+                                }
+                                Highlight::Replacement => HighlightStyle {
+                                    color: Some(color),
+                                    underline: Some(UnderlineStyle {
+                                        thickness: 1.0.into(),
+                                        ..Default::default()
+                                    }),
+                                    ..Default::default()
+                                },
+                                Highlight::Style(highlight) => *highlight,
+                            },
+                        )
+                    }),
+                )
+                .with_font_family_overrides(self.highlights.iter().filter_map(
+                    |(range, highlight)| match highlight {
+                        Highlight::Code | Highlight::InlineCode(_) => {
+                            Some((range.clone(), code_font.into()))
+                        }
+                        _ => None,
+                    },
+                )),
+        )
+        .on_click(self.link_ranges.clone(), {
+            let link_urls = self.link_urls.clone();
+            move |ix, _, cx| {
+                let url = &link_urls[ix];
+                if WEB_URL.is_match(url) {
+                    cx.open_url(url);
+                }
+            }
+        })
+        .into_any_element()
+    }
+}
+
+#[allow(clippy::too_many_arguments)]
+fn render_text_mut(
+    block: &str,
+    replacements: &[InlineReplacement],
+    text: &mut String,
+    highlights: &mut Vec<(Range<usize>, Highlight)>,
+    link_ranges: &mut Vec<Range<usize>>,
+    link_urls: &mut Vec<String>,
+    markdown: bool,
+) {
+    use pulldown_cmark::{Event, Options, Parser, Tag, TagEnd};
+
+    let mut bold_depth = 0;
+    let mut italic_depth = 0;
+    let mut strikethrough_depth = 0;
+    let mut link_url = None;
+    let mut list_stack = Vec::new();
+    let mut code_block = false;
+
+    // Only enable the extensions that make sense for chat messages. Notably this leaves
+    // out smart punctuation, tables, math and footnotes: they rewrite or swallow text.
+    let events: Box<dyn Iterator<Item = (Event<'_>, Range<usize>)> + '_> = if markdown {
+        Box::new(Parser::new_ext(block, Options::ENABLE_STRIKETHROUGH).into_offset_iter())
+    } else {
+        Box::new(std::iter::once((Event::Text(block.into()), 0..block.len())))
+    };
+
+    for (event, source_range) in events {
+        let prev_len = text.len();
+
+        match event {
+            Event::Text(t) => {
+                if code_block {
+                    text.push_str(t.as_ref());
+                    highlights.push((prev_len..text.len(), Highlight::Code));
+                    continue;
+                }
+
+                let t_str = t.as_ref();
+                let mut last_processed = 0;
+
+                for replacement in replacements {
+                    if replacement.range.start >= source_range.end {
+                        break;
+                    }
+
+                    if replacement.range.start < source_range.start
+                        || replacement.range.end > source_range.end
+                    {
+                        continue;
+                    }
+
+                    let Some(token) = block.get(replacement.range.clone()) else {
+                        continue;
+                    };
+
+                    let Some(offset) = t_str[last_processed..].find(token) else {
+                        continue;
+                    };
+
+                    let replacement_start_in_text = last_processed + offset;
+                    let replacement_end_in_text = replacement_start_in_text + token.len();
+
+                    // Add text before this replacement
+                    if replacement_start_in_text > last_processed {
+                        let before_replacement = &t_str[last_processed..replacement_start_in_text];
+                        process_text_segment(
+                            before_replacement,
+                            bold_depth,
+                            italic_depth,
+                            strikethrough_depth,
+                            link_url.clone(),
+                            text,
+                            highlights,
+                            link_ranges,
+                            link_urls,
+                        );
+                    }
+
+                    // Process the replacement
+                    let replacement_start = text.len();
+                    text.push_str(&replacement.text);
+                    let replacement_end = text.len();
+
+                    highlights.push((replacement_start..replacement_end, Highlight::Replacement));
+
+                    last_processed = replacement_end_in_text;
+                }
+
+                // Add any remaining text after the last replacement
+                if last_processed < t_str.len() {
+                    let remaining_text = &t_str[last_processed..];
+                    process_text_segment(
+                        remaining_text,
+                        bold_depth,
+                        italic_depth,
+                        strikethrough_depth,
+                        link_url.clone(),
+                        text,
+                        highlights,
+                        link_ranges,
+                        link_urls,
+                    );
+                }
+            }
+            Event::Code(t) => {
+                text.push_str(t.as_ref());
+                let is_link = link_url.is_some();
+
+                if let Some(link_url) = link_url.clone() {
+                    link_ranges.push(prev_len..text.len());
+                    link_urls.push(link_url);
+                }
+
+                highlights.push((prev_len..text.len(), Highlight::InlineCode(is_link)))
+            }
+            Event::Start(tag) => match tag {
+                Tag::Paragraph => new_paragraph(text, &mut list_stack),
+                Tag::Heading { .. } => {
+                    new_paragraph(text, &mut list_stack);
+                    bold_depth += 1;
+                }
+                Tag::CodeBlock(_kind) => {
+                    new_paragraph(text, &mut list_stack);
+                    code_block = true;
+                }
+                Tag::Emphasis => italic_depth += 1,
+                Tag::Strong => bold_depth += 1,
+                Tag::Strikethrough => strikethrough_depth += 1,
+                Tag::Link { dest_url, .. } => {
+                    link_url = WEB_URL.is_match(&dest_url).then(|| dest_url.to_string());
+                }
+                Tag::List(number) => {
+                    list_stack.push((number, false));
+                }
+                Tag::Item => {
+                    let len = list_stack.len();
+                    if let Some((list_number, has_content)) = list_stack.last_mut() {
+                        *has_content = false;
+                        if !text.is_empty() && !text.ends_with('\n') {
+                            text.push('\n');
+                        }
+                        for _ in 0..len - 1 {
+                            text.push_str("  ");
+                        }
+                        if let Some(number) = list_number {
+                            text.push_str(&format!("{}. ", number));
+                            *number += 1;
+                            *has_content = false;
+                        } else {
+                            text.push_str("- ");
+                        }
+                    }
+                }
+                _ => {}
+            },
+            Event::End(tag) => match tag {
+                TagEnd::CodeBlock => code_block = false,
+                TagEnd::Heading(_) => bold_depth -= 1,
+                TagEnd::Emphasis => italic_depth -= 1,
+                TagEnd::Strong => bold_depth -= 1,
+                TagEnd::Strikethrough => strikethrough_depth -= 1,
+                TagEnd::Link => link_url = None,
+                TagEnd::List(_) => drop(list_stack.pop()),
+                _ => {}
+            },
+            Event::Html(t) | Event::InlineHtml(t) => text.push_str(t.as_ref()),
+            Event::Rule => {
+                new_paragraph(text, &mut list_stack);
+                text.push_str("────────\n");
+            }
+            Event::HardBreak => text.push('\n'),
+            Event::SoftBreak => text.push('\n'),
+            _ => {}
+        }
+    }
+}
+
+#[allow(clippy::too_many_arguments)]
+fn process_text_segment(
+    segment: &str,
+    bold_depth: i32,
+    italic_depth: i32,
+    strikethrough_depth: i32,
+    link_url: Option<String>,
+    text: &mut String,
+    highlights: &mut Vec<(Range<usize>, Highlight)>,
+    link_ranges: &mut Vec<Range<usize>>,
+    link_urls: &mut Vec<String>,
+) {
+    // Build the style for this segment
+    let mut style = HighlightStyle::default();
+    if bold_depth > 0 {
+        style.font_weight = Some(FontWeight::BOLD);
+    }
+    if italic_depth > 0 {
+        style.font_style = Some(FontStyle::Italic);
+    }
+    if strikethrough_depth > 0 {
+        style.strikethrough = Some(StrikethroughStyle {
+            thickness: 1.0.into(),
+            ..Default::default()
+        });
+    }
+
+    // Ranges always refer to the rendered text, including replaced spans.
+    let segment_start = text.len();
+    text.push_str(segment);
+    let text_end = text.len();
+
+    if let Some(link_url) = link_url {
+        // Handle as a markdown link
+        link_ranges.push(segment_start..text_end);
+        link_urls.push(link_url);
+        style.underline = Some(UnderlineStyle {
+            thickness: 1.0.into(),
+            ..Default::default()
+        });
+
+        // Add highlight for the entire linked segment
+        if style != HighlightStyle::default() {
+            highlights.push((segment_start..text_end, Highlight::Style(style)));
+        }
+    } else {
+        // Handle link detection within the segment
+        let mut finder = linkify::LinkFinder::new();
+        finder.kinds(&[linkify::LinkKind::Url]);
+        let mut last_link_pos = 0;
+
+        for link in finder
+            .links(segment)
+            .filter(|link| WEB_URL.is_match(link.as_str()))
+        {
+            let start = link.start();
+            let end = link.end();
+
+            // Add non-link text before this link
+            if start > last_link_pos {
+                let non_link_start = segment_start + last_link_pos;
+                let non_link_end = segment_start + start;
+
+                if style != HighlightStyle::default() {
+                    highlights.push((non_link_start..non_link_end, Highlight::Style(style)));
+                }
+            }
+
+            // Add the link
+            let range = (segment_start + start)..(segment_start + end);
+            link_ranges.push(range.clone());
+            link_urls.push(link.as_str().to_string());
+
+            // Apply link styling (underline + existing style)
+            let mut link_style = style;
+            link_style.underline = Some(UnderlineStyle {
+                thickness: 1.0.into(),
+                ..Default::default()
+            });
+
+            highlights.push((range, Highlight::Style(link_style)));
+
+            last_link_pos = end;
+        }
+
+        // Add any remaining text after the last link
+        if last_link_pos < segment.len() {
+            let remaining_start = segment_start + last_link_pos;
+            let remaining_end = segment_start + segment.len();
+
+            if style != HighlightStyle::default() {
+                highlights.push((remaining_start..remaining_end, Highlight::Style(style)));
+            }
+        }
+    }
+}
+
+fn new_paragraph(text: &mut String, list_stack: &mut [(Option<u64>, bool)]) {
+    let mut is_subsequent_paragraph_of_list = false;
+
+    if let Some((_, has_content)) = list_stack.last_mut() {
+        if *has_content {
+            is_subsequent_paragraph_of_list = true;
+        } else {
+            *has_content = true;
+            return;
+        }
+    }
+
+    if !text.is_empty() {
+        if !text.ends_with('\n') {
+            text.push('\n');
+        }
+        text.push('\n');
+    }
+
+    for _ in 0..list_stack.len().saturating_sub(1) {
+        text.push_str("  ");
+    }
+
+    if is_subsequent_paragraph_of_list {
+        text.push_str("  ");
+    }
+}

crates/ui/src/message.rs

@@ -0,0 +1,325 @@
+use gpui::prelude::FluentBuilder as _;
+use gpui::{
+    AnyElement, App, ClickEvent, ElementId, InteractiveElement as _, IntoElement, MouseButton,
+    MouseDownEvent, ParentElement as _, RenderOnce, SharedString, StyleRefinement, Styled, Window,
+    div, px,
+};
+use smallvec::SmallVec;
+use theme::ActiveTheme;
+
+use crate::{InteractiveElementExt as _, StyledExt as _, h_flex, v_flex};
+
+type MouseDownListener = Box<dyn Fn(&MouseDownEvent, &mut Window, &mut App) + 'static>;
+type DoubleClickListener = Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>;
+
+/// A single message row in a chat-like list.
+#[derive(IntoElement)]
+pub struct MessageRow {
+    id: ElementId,
+    style: StyleRefinement,
+    show_author: bool,
+    hide_avatar: bool,
+    avatar: Option<AnyElement>,
+    author: Option<SharedString>,
+    timestamp: Option<SharedString>,
+    header_extras: SmallVec<[AnyElement; 1]>,
+    body: SmallVec<[AnyElement; 4]>,
+    overlays: SmallVec<[AnyElement; 2]>,
+    on_mouse_down: Option<(MouseButton, MouseDownListener)>,
+    on_double_click: Option<DoubleClickListener>,
+}
+
+impl MessageRow {
+    /// Create a message row with the given element id.
+    pub fn new(id: impl Into<ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            style: StyleRefinement::default(),
+            show_author: false,
+            hide_avatar: false,
+            avatar: None,
+            author: None,
+            timestamp: None,
+            header_extras: SmallVec::new(),
+            body: SmallVec::new(),
+            overlays: SmallVec::new(),
+            on_mouse_down: None,
+            on_double_click: None,
+        }
+    }
+
+    /// Whether this row opens a run of messages from one author.
+    #[must_use]
+    pub fn show_author(mut self, show_author: bool) -> Self {
+        self.show_author = show_author;
+        self
+    }
+
+    /// Hide the avatar column entirely.
+    #[must_use]
+    pub fn hide_avatar(mut self, hide_avatar: bool) -> Self {
+        self.hide_avatar = hide_avatar;
+        self
+    }
+
+    /// The avatar shown when this row opens a run of messages.
+    #[must_use]
+    pub fn avatar(mut self, avatar: impl IntoElement) -> Self {
+        self.avatar = Some(avatar.into_any_element());
+        self
+    }
+
+    /// The author's display name, shown next to the timestamp.
+    #[must_use]
+    pub fn author(mut self, author: impl Into<SharedString>) -> Self {
+        self.author = Some(author.into());
+        self
+    }
+
+    /// The time the message was sent.
+    #[must_use]
+    pub fn timestamp(mut self, timestamp: impl Into<SharedString>) -> Self {
+        self.timestamp = Some(timestamp.into());
+        self
+    }
+
+    /// Append an element to the header row.
+    #[must_use]
+    pub fn header_extra(mut self, extra: impl IntoElement) -> Self {
+        self.header_extras.push(extra.into_any_element());
+        self
+    }
+
+    /// Append an element to the message body, in order.
+    #[must_use]
+    pub fn child(mut self, child: impl IntoElement) -> Self {
+        self.body.push(child.into_any_element());
+        self
+    }
+
+    /// Append several elements to the message body, in order.
+    #[must_use]
+    pub fn children(mut self, children: impl IntoIterator<Item = impl IntoElement>) -> Self {
+        self.body
+            .extend(children.into_iter().map(|child| child.into_any_element()));
+        self
+    }
+
+    /// Append an element positioned over the row.
+    #[must_use]
+    pub fn overlay(mut self, overlay: impl IntoElement) -> Self {
+        self.overlays.push(overlay.into_any_element());
+        self
+    }
+
+    /// Handle a mouse button press anywhere on the row.
+    #[must_use]
+    pub fn on_mouse_down(
+        mut self,
+        button: MouseButton,
+        listener: impl Fn(&MouseDownEvent, &mut Window, &mut App) + 'static,
+    ) -> Self {
+        self.on_mouse_down = Some((button, Box::new(listener)));
+        self
+    }
+
+    /// Handle a double click anywhere on the row.
+    #[must_use]
+    pub fn on_double_click(
+        mut self,
+        listener: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static,
+    ) -> Self {
+        self.on_double_click = Some(Box::new(listener));
+        self
+    }
+}
+
+impl Styled for MessageRow {
+    fn style(&mut self) -> &mut StyleRefinement {
+        &mut self.style
+    }
+}
+
+impl RenderOnce for MessageRow {
+    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
+        let Self {
+            id,
+            style,
+            show_author,
+            hide_avatar,
+            avatar,
+            author,
+            timestamp,
+            header_extras,
+            body,
+            overlays,
+            on_mouse_down,
+            on_double_click,
+        } = self;
+
+        div()
+            .id(id)
+            .group("")
+            .relative()
+            .w_full()
+            .py_1()
+            .when(show_author, |this| this.pt_2())
+            .px_3()
+            .refine_style(&style)
+            .child(
+                h_flex()
+                    .items_start()
+                    .gap_3()
+                    .when(!hide_avatar, |this| {
+                        if show_author {
+                            match avatar {
+                                Some(avatar) => this.child(avatar),
+                                None => this.child(div().flex_shrink_0().w(px(32.))),
+                            }
+                        } else {
+                            this.child(div().flex_shrink_0().w(px(32.)))
+                        }
+                    })
+                    .child(
+                        v_flex()
+                            .flex_1()
+                            .w_full()
+                            .min_w_0()
+                            .flex_initial()
+                            .overflow_hidden()
+                            .when(show_author, |this| {
+                                this.child(
+                                    h_flex()
+                                        .gap_2()
+                                        .text_sm()
+                                        .text_color(cx.theme().text_placeholder)
+                                        .when_some(author, |this, author| {
+                                            this.child(div().font_semibold().child(author))
+                                        })
+                                        .when_some(timestamp, |this, timestamp| {
+                                            this.child(timestamp)
+                                        })
+                                        .children(header_extras),
+                                )
+                            })
+                            .children(body),
+                    ),
+            )
+            .children(overlays)
+            .when_some(on_mouse_down, |this, (button, listener)| {
+                this.on_mouse_down(button, listener)
+            })
+            .when_some(on_double_click, |this, listener| {
+                this.on_double_click(listener)
+            })
+            .hover(|this| this.bg(cx.theme().surface_background))
+            .into_any_element()
+    }
+}
+
+/// A welcome message shown at the top of a message list.
+#[derive(IntoElement)]
+pub struct WelcomeMessage {
+    id: ElementId,
+    style: StyleRefinement,
+    icon: Option<AnyElement>,
+    title: Option<SharedString>,
+    message: Option<SharedString>,
+    children: SmallVec<[AnyElement; 2]>,
+}
+
+impl WelcomeMessage {
+    /// Create a welcome message with the given element id.
+    pub fn new(id: impl Into<ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            style: StyleRefinement::default(),
+            icon: None,
+            title: None,
+            message: None,
+            children: SmallVec::new(),
+        }
+    }
+
+    /// The icon shown above the title.
+    #[must_use]
+    pub fn icon(mut self, icon: impl IntoElement) -> Self {
+        self.icon = Some(icon.into_any_element());
+        self
+    }
+
+    /// The welcome title.
+    #[must_use]
+    pub fn title(mut self, title: impl Into<SharedString>) -> Self {
+        self.title = Some(title.into());
+        self
+    }
+
+    /// The welcome body text.
+    #[must_use]
+    pub fn message(mut self, message: impl Into<SharedString>) -> Self {
+        self.message = Some(message.into());
+        self
+    }
+
+    /// Append an element below the body text.
+    #[must_use]
+    pub fn child(mut self, child: impl IntoElement) -> Self {
+        self.children.push(child.into_any_element());
+        self
+    }
+}
+
+impl Styled for WelcomeMessage {
+    fn style(&mut self) -> &mut StyleRefinement {
+        &mut self.style
+    }
+}
+
+impl RenderOnce for WelcomeMessage {
+    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
+        let Self {
+            id,
+            style,
+            icon,
+            title,
+            message,
+            children,
+        } = self;
+
+        v_flex()
+            .id(id)
+            .w_full()
+            .gap_2()
+            .p_3()
+            .items_center()
+            .justify_center()
+            .text_center()
+            .refine_style(&style)
+            .when_some(icon, |this, icon| this.child(icon))
+            .child(
+                v_flex()
+                    .items_center()
+                    .justify_center()
+                    .text_center()
+                    .when_some(title, |this, title| {
+                        this.child(
+                            div()
+                                .text_sm()
+                                .font_semibold()
+                                .text_color(cx.theme().text)
+                                .child(title),
+                        )
+                    })
+                    .when_some(message, |this, message| {
+                        this.child(
+                            div()
+                                .text_xs()
+                                .text_color(cx.theme().text_placeholder)
+                                .child(message),
+                        )
+                    }),
+            )
+            .children(children)
+    }
+}

crates/ui/src/nav.rs

@@ -0,0 +1,123 @@
+use std::rc::Rc;
+
+use gpui::prelude::FluentBuilder as _;
+use gpui::{
+    AnyElement, App, ClickEvent, ElementId, InteractiveElement, IntoElement, ParentElement,
+    RenderOnce, SharedString, StatefulInteractiveElement as _, StyleRefinement, Styled, Window,
+    div,
+};
+use theme::ActiveTheme;
+
+use crate::{Selectable, StyledExt, h_flex, v_flex};
+
+/// A single navigation row, such as an entry in a sidebar list.
+#[derive(IntoElement)]
+pub struct Nav {
+    id: ElementId,
+    style: StyleRefinement,
+    prefix: Option<AnyElement>,
+    label: SharedString,
+    suffix: Option<AnyElement>,
+    selected: bool,
+    #[allow(clippy::type_complexity)]
+    on_click: Option<Rc<dyn Fn(&ClickEvent, &mut Window, &mut App)>>,
+}
+
+impl Nav {
+    pub fn new(id: impl Into<ElementId>) -> Self {
+        Self {
+            id: id.into(),
+            style: StyleRefinement::default(),
+            prefix: None,
+            label: SharedString::default(),
+            suffix: None,
+            selected: false,
+            on_click: None,
+        }
+    }
+
+    /// Sets the element shown before the label, such as an avatar or icon.
+    pub fn prefix(mut self, prefix: impl IntoElement) -> Self {
+        self.prefix = Some(prefix.into_any_element());
+        self
+    }
+
+    /// Sets the row's label.
+    pub fn label(mut self, label: impl Into<SharedString>) -> Self {
+        self.label = label.into();
+        self
+    }
+
+    /// Sets the element shown after the label, such as a timestamp or badge.
+    pub fn suffix(mut self, suffix: impl IntoElement) -> Self {
+        self.suffix = Some(suffix.into_any_element());
+        self
+    }
+
+    pub fn on_click(
+        mut self,
+        handler: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static,
+    ) -> Self {
+        self.on_click = Some(Rc::new(handler));
+        self
+    }
+}
+
+impl Selectable for Nav {
+    fn selected(mut self, selected: bool) -> Self {
+        self.selected = selected;
+        self
+    }
+
+    fn is_selected(&self) -> bool {
+        self.selected
+    }
+}
+
+impl Styled for Nav {
+    fn style(&mut self) -> &mut StyleRefinement {
+        &mut self.style
+    }
+}
+
+impl RenderOnce for Nav {
+    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
+        let clickable = self.on_click.is_some();
+
+        v_flex()
+            .id(format!("nav-{}", self.id))
+            .w_full()
+            .h_10()
+            .child(
+                h_flex()
+                    .id(self.id)
+                    .h_9()
+                    .w_full()
+                    .px_1p5()
+                    .gap_1p5()
+                    .rounded(cx.theme().radius_lg)
+                    .when_some(self.prefix, |this, prefix| this.child(prefix))
+                    .child(
+                        h_flex()
+                            .gap_1()
+                            .flex_1()
+                            .child(div().truncate().min_w_0().child(self.label))
+                            .child(div().flex_1())
+                            .when_some(self.suffix, |this, suffix| {
+                                this.child(div().flex_shrink_0().child(suffix))
+                            }),
+                    )
+                    .when(clickable, |this| {
+                        this.cursor_pointer()
+                            .hover(|this| this.bg(cx.theme().ghost_element_hover))
+                            .when(self.selected, |this| {
+                                this.bg(cx.theme().ghost_element_active)
+                            })
+                    })
+                    .when_some(self.on_click, |this, handler| {
+                        this.on_click(move |event, window, cx| handler(event, window, cx))
+                    })
+                    .refine_style(&self.style),
+            )
+    }
+}

crates/ui/src/tab/mod.rs

@@ -3,9 +3,9 @@ use std::rc::Rc;
 use gpui::prelude::FluentBuilder as _;
 use gpui::{
     AnyElement, App, ClickEvent, Div, InteractiveElement, IntoElement, MouseButton, ParentElement,
-    RenderOnce, SharedString, StatefulInteractiveElement, Styled, Window, div, px, relative,
+    RenderOnce, SharedString, StatefulInteractiveElement, Styled, Window, div, px,
 };
-use theme::{ActiveTheme, TABBAR_HEIGHT};
+use theme::ActiveTheme;
 
 use crate::{Icon, IconName, Selectable, h_flex};
 
@@ -25,6 +25,7 @@ pub struct Tab {
     children: Vec<AnyElement>,
     pub(super) disabled: bool,
     pub(super) selected: bool,
+    pub(super) segmented: bool,
     on_click: Option<Rc<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>>,
 }
 
@@ -69,6 +70,7 @@ impl Default for Tab {
             children: Vec::new(),
             disabled: false,
             selected: false,
+            segmented: false,
             prefix: None,
             suffix: None,
             on_click: None,
@@ -132,6 +134,12 @@ impl Tab {
         self.tab_bar_prefix = Some(tab_bar_prefix);
         self
     }
+
+    /// Render the tab as a segment inside a segmented control.
+    pub(crate) fn segmented(mut self, segmented: bool) -> Self {
+        self.segmented = segmented;
+        self
+    }
 }
 
 impl ParentElement for Tab {
@@ -167,74 +175,103 @@ impl Styled for Tab {
 
 impl RenderOnce for Tab {
     fn render(self, _: &mut Window, cx: &mut App) -> impl IntoElement {
-        let fg = if self.disabled {
+        let Self {
+            ix,
+            base,
+            label,
+            icon,
+            prefix,
+            suffix,
+            children,
+            disabled,
+            selected,
+            segmented,
+            on_click,
+            ..
+        } = self;
+
+        let foreground = if disabled {
             cx.theme().text_muted
-        } else if self.selected {
+        } else if selected {
             cx.theme().tab_active_foreground
         } else {
             cx.theme().tab_foreground
         };
 
-        self.base
+        let content = h_flex()
-            .id(self.ix)
-            .flex()
-            .flex_wrap()
-            .gap_1()
-            .items_center()
-            .flex_shrink_0()
-            .h(TABBAR_HEIGHT)
-            .relative()
-            .overflow_hidden()
-            .text_color(fg)
-            .text_sm()
-            .when_some(self.prefix, |this, prefix| this.child(prefix))
-            .child(
-                h_flex()
             .flex_1()
-                    .h(px(30.))
+            .h_6()
-                    .line_height(relative(1.))
             .whitespace_nowrap()
             .items_center()
-                    .justify_center()
             .overflow_hidden()
-                    .flex_shrink_0()
+            .when(segmented, |this| this.justify_center().px_1())
-                    .px_3()
+            .when(!segmented, |this| this.justify_start())
-                    .map(|this| match self.icon {
+            .map(|this| match icon {
                 Some(icon) => this.w(px(38.)).child(icon.size_4()),
                 None => this
-                            .map(|this| match self.label {
+                    .map(|this| match label {
                         Some(label) => this.child(label),
                         None => this,
                     })
-                            .children(self.children),
+                    .children(children),
-                    }),
+            });
+
+        base.id(ix)
+            .group("tab")
+            .flex()
+            .items_center()
+            .text_color(foreground)
+            .when(segmented, |this| {
+                this.text_xs()
+                    .flex_1()
+                    .h_6()
+                    .rounded(cx.theme().radius)
+                    .when(selected && !disabled, |this| {
+                        this.bg(cx.theme().tab_active_background)
+                            .when(cx.theme().shadow, |this| this.shadow_sm())
+                    })
+                    .when(!selected && !disabled, |this| {
+                        this.hover(|this| this.bg(cx.theme().tab_hover_background))
+                    })
+            })
+            .when(!segmented, |this| {
+                this.flex_shrink_0()
+                    .min_w_32()
+                    .h_7()
+                    .gap_1()
+                    .px_1p5()
+                    .text_sm()
+                    .rounded(cx.theme().radius)
+                    .overflow_hidden()
+                    .when(selected && !disabled, |this| {
+                        this.bg(cx.theme().tab_background)
+                    })
+                    .when(!selected && !disabled, |this| {
+                        this.hover(|this| {
+                            this.bg(cx.theme().tab_hover_background)
+                                .text_color(cx.theme().tab_active_foreground)
+                        })
+                    })
+            })
+            .when_some(prefix, |this, prefix| this.child(prefix))
+            .child(content)
+            .when_some(suffix, |this, suffix| {
+                this.child(
+                    div()
+                        .flex_shrink_0()
+                        .when(!selected, |this| {
+                            this.invisible().group_hover("tab", |this| this.visible())
+                        })
+                        .child(suffix),
                 )
-            .when_some(self.suffix, |this, suffix| {
-                this.child(div().pr_2().child(suffix))
             })
             .on_mouse_down(MouseButton::Left, |_ev, _window, cx| {
                 cx.stop_propagation();
             })
-            .when(!self.disabled, |this| {
+            .when(!disabled, |this| {
-                this.when_some(self.on_click.clone(), |this, on_click| {
+                this.when_some(on_click, |this, on_click| {
                     this.on_click(move |event, window, cx| on_click(event, window, cx))
                 })
             })
-            .child(
-                div()
-                    .absolute()
-                    .bottom_0()
-                    .left_0()
-                    .right_0()
-                    .h_0p5()
-                    .when(self.selected && !self.disabled, |this| {
-                        this.bg(cx.theme().element_active)
-                    })
-                    .when(!self.selected && !self.disabled, |this| {
-                        this.invisible().group_hover("", |this| {
-                            this.visible().bg(cx.theme().secondary_background)
-                        })
-                    }),
-            )
     }
 }

crates/ui/src/tab/tab_bar.rs

@@ -7,6 +7,7 @@ use gpui::{
     Window, div, px,
 };
 use smallvec::SmallVec;
+use theme::ActiveTheme;
 
 use super::Tab;
 use crate::button::{Button, ButtonVariants as _};
@@ -25,6 +26,7 @@ pub struct TabBar {
     last_empty_space: AnyElement,
     selected_index: Option<usize>,
     menu: bool,
+    segmented: bool,
     #[allow(clippy::type_complexity)]
     on_click: Option<Rc<dyn Fn(&usize, &mut Window, &mut App) + 'static>>,
 }
@@ -43,9 +45,16 @@ impl TabBar {
             selected_index: None,
             on_click: None,
             menu: false,
+            segmented: false,
         }
     }
 
+    /// Render the tabs as a segmented control inside a pill-shaped track.
+    pub fn segmented(mut self, segmented: bool) -> Self {
+        self.segmented = segmented;
+        self
+    }
+
     /// Set whether to show the menu button when tabs overflow, default is false.
     pub fn menu(mut self, menu: bool) -> Self {
         self.menu = menu;
@@ -113,33 +122,45 @@ impl Styled for TabBar {
 }
 
 impl RenderOnce for TabBar {
-    fn render(self, _: &mut Window, _cx: &mut App) -> impl IntoElement {
+    fn render(self, _: &mut Window, cx: &mut App) -> impl IntoElement {
         let mut item_labels = Vec::new();
         let selected_index = self.selected_index;
         let on_click = self.on_click.clone();
+        let segmented = self.segmented;
+        let has_prefix = self.prefix.is_some();
 
         self.base
             .group("tab-bar")
             .relative()
             .flex()
             .items_center()
+            .min_w_0()
             .refine_style(&self.style)
+            .when(segmented, |this| {
+                this.bg(cx.theme().tab_background)
+                    .p_0p5()
+                    .rounded(cx.theme().radius)
+            })
             .when_some(self.prefix, |this, prefix| this.child(prefix))
             .child(
                 h_flex()
                     .id("tabs")
                     .flex_1()
-                    .overflow_x_scroll()
+                    .when(!segmented, |this| {
+                        this.overflow_x_scroll()
+                            .when(!has_prefix, |this| this.pl_2())
+                    })
                     .when_some(self.scroll_handle, |this, scroll_handle| {
                         this.track_scroll(&scroll_handle)
                     })
-                    .gap(px(0.))
+                    .gap_1()
                     .children(self.children.into_iter().enumerate().map(|(ix, child)| {
                         item_labels.push((child.label.clone(), child.disabled));
                         let tab_bar_prefix = child.tab_bar_prefix.unwrap_or(true);
                         child
                             .ix(ix)
                             .tab_bar_prefix(tab_bar_prefix)
+                            .segmented(segmented)
                             .when_some(self.selected_index, |this, selected_ix| {
                                 this.selected(selected_ix == ix)
                             })

crates/workspace/src/dialogs/import.rs

@@ -20,7 +20,7 @@ pub fn open(window: &mut Window, cx: &mut App) {
             .show_close(false)
             .overlay_closable(false)
             .keyboard(false)
-            .title("Onboarding")
+            .title("Get Started")
             .child(import.clone())
     });
 }

crates/workspace/src/dialogs/new_chat.rs

@@ -2,17 +2,18 @@ use chat::{ChatRegistry, Room, RoomKind};
 use gpui::prelude::FluentBuilder;
 use gpui::{
     App, AppContext, Context, Entity, IntoElement, ParentElement, Render, SharedString, Styled,
-    Subscription, Window, div, px,
+    Subscription, WeakEntity, Window, div, px,
 };
 use nostr_sdk::prelude::*;
 use state::NostrRegistry;
 use theme::ActiveTheme;
 use ui::button::{Button, ButtonVariants};
+use ui::dock::{DockArea, DockPlacement, PanelHandle};
 use ui::input::{Input, InputEvent, InputState};
 use ui::{StyledExt, WindowExtension, v_flex};
 
-pub fn open(window: &mut Window, cx: &mut App) {
+pub fn open(dock: WeakEntity<DockArea>, window: &mut Window, cx: &mut App) {
-    let view = cx.new(|cx| NewChat::new(window, cx));
+    let view = cx.new(|cx| NewChat::new(dock, window, cx));
 
     window.open_modal(cx, move |this, _window, _cx| {
         this.width(px(420.)).title("New chat").child(view.clone())
@@ -20,6 +21,9 @@ pub fn open(window: &mut Window, cx: &mut App) {
 }
 
 pub struct NewChat {
+    /// The dock a started chat opens in
+    dock: WeakEntity<DockArea>,
+
     /// Public key input
     input: Entity<InputState>,
 
@@ -31,7 +35,7 @@ pub struct NewChat {
 }
 
 impl NewChat {
-    fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
+    fn new(dock: WeakEntity<DockArea>, window: &mut Window, cx: &mut Context<Self>) -> Self {
         let input = cx.new(|cx| InputState::new(window, cx).placeholder("npub"));
 
         let subscription = cx.subscribe_in(&input, window, |this, _input, event, window, cx| {
@@ -41,6 +45,7 @@ impl NewChat {
         });
 
         Self {
+            dock,
             input,
             error: None,
             _subscription: Some(subscription),
@@ -56,6 +61,8 @@ impl NewChat {
         };
 
         let nostr = NostrRegistry::global(cx);
+        let chat = ChatRegistry::global(cx);
+
         let Some(current_user) = nostr.read(cx).current_user() else {
             self.set_error("You are not signed in", cx);
             return;
@@ -70,12 +77,20 @@ impl NewChat {
             .organize(&current_user)
             .kind(RoomKind::Ongoing);
 
-        let chat = ChatRegistry::global(cx);
+        let room = chat.update(cx, |chat, cx| {
-        chat.update(cx, |chat, cx| {
             let room = cx.new(|_| room);
-            chat.emit_room(&room, window, cx);
+            chat.track_room(&room, cx);
+            room
         });
 
+        ui::dock::add_panel_to(
+            &self.dock,
+            PanelHandle::new(chat_ui::init(room.downgrade(), window, cx)),
+            DockPlacement::Center,
+            window,
+            cx,
+        );
+
         window.close_modal(cx);
     }
 

crates/workspace/src/lib.rs

@@ -1,4 +1,3 @@
-use std::rc::Rc;
 use std::sync::Arc;
 
 use ::settings::AppSettings;
@@ -6,25 +5,20 @@ use anyhow::Error;
 use auto_update::AutoUpdater;
 use chat::{ChatEvent, ChatRegistry};
 use common::download_dir;
-use community::{CommunityEvent, CommunityRegistry};
-use community_ui::CommunityPanel;
 use device::{DeviceEvent, DeviceRegistry};
-use gpui::prelude::FluentBuilder;
 use gpui::{
-    Action, AnyElement, App, AppContext, Context, Entity, InteractiveElement, IntoElement,
+    Action, App, AppContext, Context, Entity, InteractiveElement, IntoElement, ParentElement,
-    ParentElement, Render, SharedString, Styled, Subscription, Task, WeakEntity, Window, div, px,
+    Render, SharedString, Styled, Subscription, Task, Window, div, px,
 };
 use nostr_sdk::prelude::*;
-use person::{PersonRegistry, shorten_pubkey};
 use serde::Deserialize;
 use smallvec::{SmallVec, smallvec};
 use state::{NostrRegistry, StateEvent};
 use theme::{ActiveTheme, SIDEBAR_WIDTH, Theme, ThemeRegistry};
 use ui::button::{Button, ButtonVariants};
-use ui::dock::{self, ClosePanel, DockArea, DockLayout, DockPlacement, Panel, PanelHandle};
+use ui::dock::{self, DockArea, DockLayout, DockPlacement, Panel, PanelHandle};
-use ui::menu::{DropdownMenu, PopupMenuItem};
 use ui::notification::{Notification, NotificationKind};
-use ui::{Icon, IconName, Root, Sizable, WindowExtension, h_flex, v_flex};
+use ui::{IconName, Root, Sizable, WindowExtension, h_flex, v_flex};
 
 use crate::dialogs::restore::RestoreEncryption;
 use crate::dialogs::{new_chat, new_community, settings};
@@ -71,9 +65,6 @@ enum Command {
 
 pub struct Workspace {
     dock: Entity<DockArea>,
-    title_bar_chrome: Rc<dock::TitleBarChrome>,
-    /// The community panel currently docked, if any
-    community_panel: Option<WeakEntity<CommunityPanel>>,
     /// Async tasks
     tasks: Vec<Task<Result<(), Error>>>,
     /// Event subscriptions
@@ -83,12 +74,11 @@ pub struct Workspace {
 impl Workspace {
     fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
         let chat = ChatRegistry::global(cx);
-        let communities = CommunityRegistry::global(cx);
         let device = DeviceRegistry::global(cx);
         let nostr = NostrRegistry::global(cx);
 
-        let sidebar = cx.new(|cx| Sidebar::new(window, cx));
+        let (dock, _) = dock::dock_area("coop", window, cx);
-        let (dock, title_bar_chrome) = dock::dock_area("coop", window, cx);
+        let sidebar = cx.new(|cx| Sidebar::new(window, dock.downgrade(), cx));
 
         let mut subscriptions = smallvec![];
 
@@ -164,7 +154,7 @@ impl Workspace {
 
         subscriptions.push(
             // Observe all events emitted by the chat registry
-            cx.subscribe_in(&chat, window, move |this, chat, ev, window, cx| {
+            cx.subscribe_in(&chat, window, move |_this, _chat, ev, window, cx| {
                 match ev {
                     ChatEvent::InboxRelayNotFound => {
                         const MSG: &str = "Messaging Relays not found. Cannot receive messages.";
@@ -187,28 +177,6 @@ impl Workspace {
                             cx,
                         );
                     }
-                    ChatEvent::OpenRoom(id) => {
-                        if let Some(room) = chat.read(cx).room(id, cx) {
-                            this.add_panel_to_dock(
-                                chat_ui::init(room, window, cx),
-                                DockPlacement::Center,
-                                window,
-                                cx,
-                            );
-                        }
-                    }
-                    ChatEvent::CloseRoom(..) => {
-                        this.dock.update(cx, |area, cx| {
-                            // Force focus to the tab panel
-                            ui::dock::focus_tab_panel(area, window, cx);
-
-                            // Dispatch the close panel action
-                            cx.defer_in(window, |_, window, cx| {
-                                window.dispatch_action(Box::new(ClosePanel), cx);
-                                window.close_all_modals(cx);
-                            });
-                        });
-                    }
                     ChatEvent::Error(error) => {
                         window.push_notification(Notification::error(error).autohide(false), cx);
                     }
@@ -217,71 +185,23 @@ impl Workspace {
             }),
         );
 
-        subscriptions.push(
-            // Observe all events emitted by the community registry
-            cx.subscribe_in(
-                &communities,
-                window,
-                move |this, communities, event, window, cx| match event {
-                    CommunityEvent::Open(id) => {
-                        if let Some(community) = communities.read(cx).community(id) {
-                            let panel = community_ui::init(community, window, cx);
-
-                            this.community_panel = Some(panel.downgrade());
-                            this.add_panel_to_dock(panel, DockPlacement::Center, window, cx);
-                        }
-                    }
-                    CommunityEvent::Close(_) => {
-                        let Some(panel) = this
-                            .community_panel
-                            .take()
-                            .and_then(|panel| panel.upgrade())
-                        else {
-                            return;
-                        };
-
-                        this.dock.update(cx, |area, cx| {
-                            ui::dock::add_panel(
-                                area,
-                                PanelHandle::new(panel),
-                                DockPlacement::Center,
-                                window,
-                                cx,
-                            );
-                            ui::dock::focus_tab_panel(area, window, cx);
-
-                            cx.defer_in(window, |_, window, cx| {
-                                window.dispatch_action(Box::new(ClosePanel), cx);
-                            });
-                        });
-                    }
-                    _ => {}
-                },
-            ),
-        );
-
         cx.defer_in(window, move |this, window, cx| {
             let sidebar = PanelHandle::new(sidebar);
-
-            this.dock.update(cx, |area, cx| {
-                let left = DockLayout::tabs().panel_view(Arc::new(sidebar), cx);
-                area.set_dock(DockPlacement::Left, left, window, cx);
-                area.set_dock_size(DockPlacement::Left, SIDEBAR_WIDTH, window, cx);
-            });
-
             let greeter = PanelHandle::new(greeter::init(window, cx));
+
+            this.dock.update(cx, |this, cx| {
+                let left = DockLayout::tabs().panel_view(Arc::new(sidebar), cx);
                 let center = DockLayout::v_split()
                     .child(DockLayout::tabs().panel_view(Arc::new(greeter), cx), None);
 
-            this.dock.update(cx, |area, cx| {
+                this.set_dock(DockPlacement::Left, left, window, cx);
-                area.set_center(center, window, cx);
+                this.set_dock_size(DockPlacement::Left, SIDEBAR_WIDTH, window, cx);
+                this.set_center(center, window, cx);
             });
         });
 
         Self {
             dock,
-            title_bar_chrome,
-            community_panel: None,
             tasks: vec![],
             _subscriptions: subscriptions,
         }
@@ -365,10 +285,11 @@ impl Workspace {
                 self.add_panel_to_dock(browse::init(window, cx), DockPlacement::Center, window, cx);
             }
             Command::ShowSearch => {
-                self.add_panel_to_dock(search::init(window, cx), DockPlacement::Center, window, cx);
+                let panel = search::init(self.dock.downgrade(), window, cx);
+                self.add_panel_to_dock(panel, DockPlacement::Center, window, cx);
             }
             Command::NewChat => {
-                new_chat::open(window, cx);
+                new_chat::open(self.dock.downgrade(), window, cx);
             }
             Command::NewCommunity => {
                 new_community::open(window, cx);
@@ -583,174 +504,6 @@ impl Workspace {
                 }))
         });
     }
-
-    fn titlebar_right(_window: &mut Window, cx: &mut App) -> AnyElement {
-        let auto_updater = AutoUpdater::try_global(cx);
-        let chat = ChatRegistry::global(cx);
-        let nip4e_enabled = AppSettings::get_nip4e(cx);
-        let nostr = NostrRegistry::global(cx);
-
-        let Some(public_key) = nostr.read(cx).current_user() else {
-            return div().into_any_element();
-        };
-
-        let persons = PersonRegistry::global(cx);
-        let profile = persons.read(cx).get(&public_key, cx);
-        let announcement = profile.announcement();
-
-        let updater_status = auto_updater.as_ref().and_then(|updater| {
-            let updater = updater.read(cx);
-            (!updater.idle()).then(|| updater.status())
-        });
-
-        let staged_update = auto_updater
-            .as_ref()
-            .is_some_and(|updater| updater.read(cx).staged());
-
-        h_flex()
-            .when(!cx.theme().platform.is_mac(), |this| this.pr_2())
-            .gap_2()
-            .when_some(updater_status, |this, status| {
-                this.child(div().text_xs().italic().child(status))
-            })
-            .when(staged_update, |this| {
-                this.child(
-                    Button::new("restart-to-update")
-                        .label("Restart to Update")
-                        .tooltip("Quit and relaunch into the installed update")
-                        .small()
-                        .ghost()
-                        .on_click(|_event, _window, cx| {
-                            if let Some(auto_updater) = AutoUpdater::try_global(cx) {
-                                auto_updater.update(cx, |this, cx| this.restart(cx));
-                            }
-                        }),
-                )
-            })
-            .when(nip4e_enabled, |this| {
-                this.child(
-                    Button::new("key")
-                        .icon(IconName::UserKey)
-                        .tooltip("Decoupled encryption key")
-                        .small()
-                        .ghost()
-                        .dropdown_menu(move |this, _window, _cx| {
-                            this.min_w(px(260.))
-                                .label("Encryption Key")
-                                .when_some(announcement.as_ref(), |this, announcement| {
-                                    let name = announcement.client_name();
-                                    let pkey = shorten_pubkey(announcement.public_key(), 8);
-
-                                    this.item(PopupMenuItem::element(move |_window, cx| {
-                                        h_flex()
-                                            .gap_1()
-                                            .text_sm()
-                                            .child(
-                                                Icon::new(IconName::Device)
-                                                    .small()
-                                                    .text_color(cx.theme().icon_muted),
-                                            )
-                                            .child(name.clone())
-                                    }))
-                                    .item(
-                                        PopupMenuItem::element(move |_window, cx| {
-                                            h_flex()
-                                                .gap_1()
-                                                .text_sm()
-                                                .child(
-                                                    Icon::new(IconName::UserKey)
-                                                        .small()
-                                                        .text_color(cx.theme().icon_muted),
-                                                )
-                                                .child(SharedString::from(pkey.clone()))
-                                        }),
-                                    )
-                                })
-                                .separator()
-                                .menu_with_icon(
-                                    "Backup",
-                                    IconName::Shield,
-                                    Box::new(Command::BackupEncryption),
-                                )
-                                .menu_with_icon(
-                                    "Restore from secret key",
-                                    IconName::Usb,
-                                    Box::new(Command::ImportEncryption),
-                                )
-                                .separator()
-                                .menu_with_icon(
-                                    "Reload",
-                                    IconName::Refresh,
-                                    Box::new(Command::RefreshEncryption),
-                                )
-                                .menu_with_icon(
-                                    "Reset",
-                                    IconName::Warning,
-                                    Box::new(Command::ResetEncryption),
-                                )
-                        }),
-                )
-            })
-            .child(
-                Button::new("inbox")
-                    .icon(IconName::Inbox)
-                    .small()
-                    .ghost()
-                    .dropdown_menu(move |this, _window, cx| {
-                        let urls: Vec<(SharedString, SharedString)> = profile
-                            .messaging_relays()
-                            .iter()
-                            .map(|url| {
-                                (
-                                    SharedString::from(url.to_string()),
-                                    chat.read(cx).count_messages(url).to_string().into(),
-                                )
-                            })
-                            .collect();
-
-                        // Header
-                        let menu = this.min_w(px(260.)).label("Messaging Relays");
-
-                        // Content
-                        let menu = urls.into_iter().fold(menu, |this, (url, count)| {
-                            this.item(PopupMenuItem::element(move |_window, cx| {
-                                h_flex()
-                                    .px_1()
-                                    .w_full()
-                                    .text_sm()
-                                    .justify_between()
-                                    .child(url.clone())
-                                    .child(
-                                        div()
-                                            .text_xs()
-                                            .text_color(cx.theme().text_muted)
-                                            .child(count.clone()),
-                                    )
-                            }))
-                        });
-
-                        // Footer
-                        menu.separator()
-                            .menu_with_icon(
-                                "Manage gossip relays",
-                                IconName::Relay,
-                                Box::new(Command::ShowRelayList),
-                            )
-                            .menu_with_icon(
-                                "Manage messaging relays",
-                                IconName::Relay,
-                                Box::new(Command::ShowMessaging),
-                            )
-                            .separator()
-                            .menu_with_icon(
-                                "Reload",
-                                IconName::Refresh,
-                                Box::new(Command::RefreshMessagingRelays),
-                            )
-                    }),
-            )
-            .into_any_element()
-    }
 }
 
 impl Render for Workspace {
@@ -758,9 +511,6 @@ impl Render for Workspace {
         let modal_layer = Root::render_modal_layer(window, cx);
         let notification_layer = Root::render_notification_layer(window, cx);
 
-        // Render the title bar chrome
-        self.title_bar_chrome.set_trailing(Self::titlebar_right);
-
         div()
             .id("workspace")
             .on_action(cx.listener(Self::on_command))

crates/workspace/src/panels/greeter.rs

@@ -58,13 +58,16 @@ impl Panel for GreeterPanel {
     }
 
     fn title(&self, cx: &App) -> AnyElement {
-        div()
+        h_flex()
+            .gap_1()
+            .text_xs()
             .child(
                 svg()
                     .path("brand/coop.svg")
                     .size_4()
                     .text_color(cx.theme().text_muted),
             )
+            .child("Welcome")
             .into_any_element()
     }
 }

crates/workspace/src/panels/search.rs

@@ -7,8 +7,8 @@ use common::DebouncedDelay;
 use gpui::prelude::FluentBuilder;
 use gpui::{
     AnyElement, App, AppContext, Context, ElementId, Entity, EventEmitter, FocusHandle, Focusable,
-    IntoElement, ParentElement, Render, SharedString, Styled, Subscription, Task, Window, div,
+    IntoElement, ParentElement, Render, SharedString, Styled, Subscription, Task, WeakEntity,
-    uniform_list,
+    Window, div, uniform_list,
 };
 use instant::Duration;
 use nostr_sdk::prelude::*;
@@ -17,22 +17,25 @@ use smallvec::{SmallVec, smallvec};
 use state::{FIND_DELAY, NostrRegistry};
 use theme::ActiveTheme;
 use ui::button::{Button, ButtonVariants};
-use ui::dock::{Panel, PanelEvent};
+use ui::dock::{DockArea, DockPlacement, Panel, PanelEvent, PanelHandle};
 use ui::input::{Input, InputEvent, InputState};
+use ui::nav::Nav;
 use ui::notification::Notification;
 use ui::{Icon, IconName, Selectable, Sizable, StyledExt, WindowExtension, h_flex, v_flex};
 
-use crate::sidebar::{TreeRow, TreeRowKind};
+use crate::sidebar::nav_avatar;
 
 const INPUT_PLACEHOLDER: &str = "Find or start a conversation";
 
-pub fn init(window: &mut Window, cx: &mut App) -> Entity<SearchPanel> {
+pub fn init(dock: WeakEntity<DockArea>, window: &mut Window, cx: &mut App) -> Entity<SearchPanel> {
-    cx.new(|cx| SearchPanel::new(window, cx))
+    cx.new(|cx| SearchPanel::new(dock, window, cx))
 }
 
 pub struct SearchPanel {
     name: SharedString,
     focus_handle: FocusHandle,
+    /// The dock a started chat opens in
+    dock: WeakEntity<DockArea>,
 
     /// Find input state
     find_input: Entity<InputState>,
@@ -63,7 +66,7 @@ pub struct SearchPanel {
 }
 
 impl SearchPanel {
-    fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
+    fn new(dock: WeakEntity<DockArea>, window: &mut Window, cx: &mut Context<Self>) -> Self {
         let contact_list = cx.new(|_| None);
         let selected_pkeys = cx.new(|_| HashSet::new());
         let find_results = cx.new(|_| None);
@@ -107,6 +110,7 @@ impl SearchPanel {
         Self {
             name: "Search".into(),
             focus_handle: cx.focus_handle(),
+            dock,
             find_input,
             find_debouncer: DebouncedDelay::new(),
             find_results,
@@ -285,6 +289,7 @@ impl SearchPanel {
     fn create_room(&mut self, window: &mut Window, cx: &mut Context<Self>) {
         let chat = ChatRegistry::global(cx);
         let async_chat = chat.downgrade();
+        let dock = self.dock.clone();
 
         let nostr = NostrRegistry::global(cx);
         let Some(public_key) = nostr.read(cx).current_user() else {
@@ -295,14 +300,26 @@ impl SearchPanel {
         let receivers = self.get_selected(cx);
 
         self.tasks.push(cx.spawn_in(window, async move |this, cx| {
-            // Create a new room and emit it
+            // Create a new room and register it
-            async_chat.update_in(cx, |this, _window, cx| {
+            let room = async_chat.update_in(cx, |chat, _window, cx| {
                 let room = cx.new(|_| {
                     Room::new(public_key, receivers)
                         .organize(&public_key)
                         .kind(RoomKind::Ongoing)
                 });
-                this.emit_room(&room, _window, cx);
+                chat.track_room(&room, cx);
+                room
+            })?;
+
+            // Open it in the dock
+            cx.update(|window, cx| {
+                ui::dock::add_panel_to(
+                    &dock,
+                    PanelHandle::new(chat_ui::init(room.downgrade(), window, cx)),
+                    DockPlacement::Center,
+                    window,
+                    cx,
+                );
             })?;
 
             // Reset the find panel
@@ -341,13 +358,17 @@ impl SearchPanel {
                     this.select(&pkey_clone, cx);
                 });
 
-                TreeRow::new(
+                Nav::new(ElementId::NamedInteger(
-                    ElementId::NamedInteger("search-result".into(), (range.start + ix) as u64),
+                    "search-result".into(),
-                    TreeRowKind::Room,
+                    (range.start + ix) as u64,
-                    profile.name(),
+                ))
+                .label(profile.name())
+                .text_sm()
+                .font_medium()
+                .when_some(
+                    nav_avatar(Some(profile.avatar_seed()), profile.avatar(), cx),
+                    |this, avatar| this.prefix(avatar),
                 )
-                .avatar(profile.avatar_seed())
-                .picture(profile.avatar())
                 .on_click(handler)
                 .selected(selected)
                 .into_any_element()
@@ -382,13 +403,17 @@ impl SearchPanel {
                     this.select(&pkey_clone, cx);
                 });
 
-                TreeRow::new(
+                Nav::new(ElementId::NamedInteger(
-                    ElementId::NamedInteger("contact".into(), (range.start + ix) as u64),
+                    "contact".into(),
-                    TreeRowKind::Room,
+                    (range.start + ix) as u64,
-                    profile.name().trim(),
+                ))
+                .label(profile.name().trim())
+                .text_sm()
+                .font_medium()
+                .when_some(
+                    nav_avatar(Some(profile.avatar_seed()), profile.avatar(), cx),
+                    |this, avatar| this.prefix(avatar),
                 )
-                .avatar(profile.avatar_seed())
-                .picture(profile.avatar())
                 .on_click(handler)
                 .selected(selected)
                 .into_any_element()

crates/workspace/src/sidebar/onboarding.rs

@@ -1,74 +0,0 @@
-use gpui::{App, InteractiveElement, IntoElement, ParentElement, Styled, Window, div, svg};
-use theme::{ActiveTheme, TABBAR_HEIGHT};
-use ui::button::{Button, ButtonVariants};
-use ui::{StyledExt, h_flex, title_bar_drag_handlers, v_flex};
-
-use crate::dialogs::import;
-
-const TITLE: &str = "Welcome to Coop!";
-const DESCRIPTION: &str = "Chat Freely, Stay Private on Nostr.";
-
-pub(super) fn render(window: &mut Window, cx: &mut App) -> impl IntoElement {
-    v_flex()
-        .size_full()
-        .relative()
-        .bg(cx.theme().surface_background)
-        .child(title_bar_drag_handlers(
-            div()
-                .id("onboarding-drag")
-                .absolute()
-                .top_0()
-                .left_0()
-                .h(TABBAR_HEIGHT)
-                .w_full(),
-            window,
-            cx,
-        ))
-        .child(
-            v_flex()
-                .size_full()
-                .justify_end()
-                .gap_4()
-                .p_4()
-                .child(
-                    h_flex()
-                        .gap_2()
-                        .child(
-                            svg()
-                                .path("brand/coop.svg")
-                                .size_8()
-                                .text_color(cx.theme().icon_muted),
-                        )
-                        .child(
-                            v_flex().child(div().font_semibold().child(TITLE)).child(
-                                div()
-                                    .text_xs()
-                                    .text_color(cx.theme().text_muted)
-                                    .child(DESCRIPTION),
-                            ),
-                        ),
-                )
-                .child(
-                    v_flex()
-                        .gap_2()
-                        .w_full()
-                        .child(
-                            Button::new("join-now")
-                                .label("Join now")
-                                .primary()
-                                .font_semibold()
-                                .h_8()
-                                .w_full(),
-                        )
-                        .child(
-                            Button::new("import-identity")
-                                .label("Import identity")
-                                .secondary()
-                                .font_semibold()
-                                .h_8()
-                                .w_full()
-                                .on_click(|_event, window, cx| import::open(window, cx)),
-                        ),
-                ),
-        )
-}

crates/workspace/src/sidebar/tab.rs

@@ -1,121 +1,38 @@
-use std::rc::Rc;
-
-use gpui::prelude::FluentBuilder;
-use gpui::{App, InteractiveElement, IntoElement, ParentElement, RenderOnce, Styled, Window, div};
-use theme::ActiveTheme;
-use ui::button::{Button, ButtonVariants};
-use ui::{IconName, Selectable, h_flex};
-
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum SidebarTab {
-    Recents,
+    Inbox,
-    Chats,
     Communities,
 }
 
 impl SidebarTab {
-    pub const ALL: [SidebarTab; 3] = [Self::Recents, Self::Chats, Self::Communities];
+    pub const ALL: [SidebarTab; 2] = [Self::Inbox, Self::Communities];
 
     pub fn label(self) -> &'static str {
         match self {
-            Self::Recents => "Recents",
+            Self::Inbox => "Inbox",
-            Self::Chats => "Chats",
             Self::Communities => "Communities",
         }
     }
 
-    pub fn icon(self) -> IconName {
+    /// Heading for the tab's list of items.
+    pub fn list_title(self) -> &'static str {
         match self {
-            Self::Recents => IconName::History,
+            Self::Inbox => "Direct Messages",
-            Self::Chats => IconName::Message,
+            Self::Communities => "Communities",
-            Self::Communities => IconName::Group,
         }
     }
 
     pub fn list_id(self) -> &'static str {
         match self {
-            Self::Recents => "sidebar-recents",
+            Self::Inbox => "sidebar-inbox",
-            Self::Chats => "sidebar-chats",
             Self::Communities => "sidebar-communities",
         }
     }
 
     pub fn index(self) -> usize {
         match self {
-            Self::Recents => 0,
+            Self::Inbox => 0,
-            Self::Chats => 1,
+            Self::Communities => 1,
-            Self::Communities => 2,
         }
     }
-
-    pub fn chat(self) -> bool {
-        matches!(self, Self::Chats)
-    }
-
-    pub fn community(self) -> bool {
-        matches!(self, Self::Communities)
-    }
-}
-
-#[derive(IntoElement)]
-#[allow(clippy::type_complexity)]
-pub struct TabBar {
-    active: SidebarTab,
-    on_select: Option<Rc<dyn Fn(SidebarTab, &mut Window, &mut App)>>,
-}
-
-impl TabBar {
-    pub fn new(active: SidebarTab) -> Self {
-        Self {
-            active,
-            on_select: None,
-        }
-    }
-
-    pub fn on_select(
-        mut self,
-        handler: impl Fn(SidebarTab, &mut Window, &mut App) + 'static,
-    ) -> Self {
-        self.on_select = Some(Rc::new(handler));
-        self
-    }
-}
-
-impl RenderOnce for TabBar {
-    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
-        let Self { active, on_select } = self;
-
-        div()
-            .id("sidebar-tabs")
-            .absolute()
-            .bottom_3()
-            .left_0()
-            .w_full()
-            .px_4()
-            .child(
-                h_flex()
-                    .w_full()
-                    .p_1()
-                    .gap_1()
-                    .rounded_full()
-                    .bg(cx.theme().background)
-                    .when(cx.theme().shadow, |this| this.shadow_md())
-                    .children(SidebarTab::ALL.into_iter().map(|tab| {
-                        let on_select = on_select.clone();
-
-                        Button::new(format!("tab-{}", tab.list_id()))
-                            .icon(tab.icon())
-                            .ghost()
-                            .flex_1()
-                            .rounded()
-                            .selected(tab == active)
-                            .tooltip(tab.label())
-                            .on_click(move |_event, window, cx| {
-                                if let Some(on_select) = on_select.as_ref() {
-                                    on_select(tab, window, cx);
-                                }
-                            })
-                    })),
-            )
-    }
 }

crates/workspace/src/sidebar/tree.rs

@@ -1,235 +0,0 @@
-use std::rc::Rc;
-
-use chat::Room;
-use community::Community;
-use gpui::prelude::FluentBuilder;
-use gpui::{
-    App, ClickEvent, ElementId, Entity, ImageSource, InteractiveElement, IntoElement,
-    ParentElement, RenderOnce, SharedString, StatefulInteractiveElement, Styled, Window, div, px,
-};
-use settings::AppSettings;
-use theme::ActiveTheme;
-use ui::avatar::{Avatar, PixelAvatar};
-use ui::{Icon, IconName, Selectable, Sizable, StyledExt, h_flex};
-
-use super::tab::SidebarTab;
-
-pub enum SidebarRow {
-    Section {
-        label: SharedString,
-        count: usize,
-    },
-    Room {
-        room: Entity<Room>,
-    },
-    Community {
-        community: Entity<Community>,
-    },
-    Action {
-        label: SharedString,
-        tab: SidebarTab,
-    },
-    Hint {
-        text: SharedString,
-    },
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum TreeRowKind {
-    Section,
-    Room,
-    Community,
-    Action,
-    Hint,
-}
-
-#[derive(IntoElement)]
-pub struct TreeRow {
-    id: ElementId,
-    kind: TreeRowKind,
-    label: SharedString,
-    avatar: Option<SharedString>,
-    picture: Option<ImageSource>,
-    icon: Option<IconName>,
-    count: Option<usize>,
-    created_at: Option<SharedString>,
-    selected: bool,
-    #[allow(clippy::type_complexity)]
-    on_click: Option<Rc<dyn Fn(&ClickEvent, &mut Window, &mut App)>>,
-}
-
-impl TreeRow {
-    pub fn new(
-        id: impl Into<ElementId>,
-        kind: TreeRowKind,
-        label: impl Into<SharedString>,
-    ) -> Self {
-        Self {
-            id: id.into(),
-            kind,
-            label: label.into(),
-            avatar: None,
-            picture: None,
-            icon: None,
-            count: None,
-            created_at: None,
-            selected: false,
-            on_click: None,
-        }
-    }
-
-    /// Sets the seed for the row's generated avatar.
-    pub fn avatar(mut self, seed: impl Into<SharedString>) -> Self {
-        self.avatar = Some(seed.into());
-        self
-    }
-
-    /// Shows `picture` instead of the generated avatar.
-    pub fn picture(mut self, picture: Option<impl Into<ImageSource>>) -> Self {
-        self.picture = picture.map(Into::into);
-        self
-    }
-
-    /// Shows `icon` in the avatar slot when the row has no avatar or picture.
-    pub fn icon(mut self, icon: IconName) -> Self {
-        self.icon = Some(icon);
-        self
-    }
-
-    pub fn count(mut self, count: usize) -> Self {
-        self.count = Some(count);
-        self
-    }
-
-    pub fn created_at(mut self, created_at: impl Into<SharedString>) -> Self {
-        self.created_at = Some(created_at.into());
-        self
-    }
-
-    pub fn on_click(
-        mut self,
-        handler: impl Fn(&ClickEvent, &mut Window, &mut App) + 'static,
-    ) -> Self {
-        self.on_click = Some(Rc::new(handler));
-        self
-    }
-}
-
-impl Selectable for TreeRow {
-    fn selected(mut self, selected: bool) -> Self {
-        self.selected = selected;
-        self
-    }
-
-    fn is_selected(&self) -> bool {
-        self.selected
-    }
-}
-
-impl RenderOnce for TreeRow {
-    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
-        let hide_avatar = AppSettings::get_hide_avatar(cx);
-
-        let is_section = self.kind == TreeRowKind::Section;
-        let is_room = self.kind == TreeRowKind::Room;
-        let is_community = self.kind == TreeRowKind::Community;
-        let is_action = self.kind == TreeRowKind::Action;
-        let is_hint = self.kind == TreeRowKind::Hint;
-        let is_selected = self.selected;
-
-        let avatar = if hide_avatar {
-            None
-        } else {
-            match (self.avatar, self.picture) {
-                (None, None) => None,
-                (seed, Some(picture)) => Some(
-                    Avatar::from_source(picture)
-                        .when_some(seed, |avatar, seed| avatar.seed(seed))
-                        .xsmall()
-                        .flex_shrink_0()
-                        .into_any_element(),
-                ),
-                (Some(seed), None) => Some(
-                    PixelAvatar::new(seed)
-                        .xsmall()
-                        .flex_shrink_0()
-                        .into_any_element(),
-                ),
-            }
-        };
-
-        let avatar = avatar.or_else(|| {
-            self.icon.map(|icon| {
-                h_flex()
-                    .flex_shrink_0()
-                    .w(px(20.))
-                    .justify_center()
-                    .text_color(cx.theme().icon_muted)
-                    .child(Icon::new(icon).small())
-                    .into_any_element()
-            })
-        });
-
-        h_flex()
-            .id(self.id)
-            .h_8()
-            .w_full()
-            .px_2()
-            .gap_2()
-            .rounded(cx.theme().radius)
-            .when(is_section, |this| {
-                this.text_xs()
-                    .text_color(cx.theme().text_placeholder)
-                    .font_semibold()
-            })
-            .when(is_room || is_community, |this| this.text_sm())
-            .when(is_action, |this| {
-                this.text_sm().text_color(cx.theme().text_muted)
-            })
-            .when(is_hint, |this| {
-                this.text_xs()
-                    .font_normal()
-                    .text_color(cx.theme().text_placeholder)
-            })
-            .when_some(avatar, |this, avatar| this.child(avatar))
-            .child(
-                h_flex()
-                    .gap_1()
-                    .flex_1()
-                    .child(
-                        div()
-                            .truncate()
-                            .min_w_0()
-                            .when(is_room, |this| this.font_medium())
-                            .child(self.label),
-                    )
-                    .when(is_selected, |this| {
-                        this.child(
-                            Icon::new(IconName::CheckCircle)
-                                .small()
-                                .flex_shrink_0()
-                                .text_color(cx.theme().icon_accent),
-                        )
-                    })
-                    .when_some(self.count, |this, count| {
-                        this.child(div().flex_shrink_0().font_normal().child(count.to_string()))
-                    })
-                    .when_some(self.created_at, |this, created_at| {
-                        this.child(div().flex_1()).child(
-                            div()
-                                .flex_shrink_0()
-                                .text_color(cx.theme().text_placeholder)
-                                .text_xs()
-                                .child(created_at),
-                        )
-                    }),
-            )
-            .when_some(self.on_click, |this, handler| {
-                this.cursor_pointer()
-                    .when(!is_section, |this| {
-                        this.hover(|this| this.bg(cx.theme().ghost_element_hover))
-                    })
-                    .on_click(move |event, window, cx| handler(event, window, cx))
-            })
-    }
-}

crates/workspace/src/sidebar/utils.rs

@@ -0,0 +1,58 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use gpui::prelude::FluentBuilder as _;
+use gpui::{AnyElement, App, ImageSource, IntoElement, ParentElement, SharedString, Styled, px};
+use settings::AppSettings;
+use theme::ActiveTheme;
+use ui::avatar::{Avatar, PixelAvatar};
+use ui::{Icon, IconName, Sizable, h_flex};
+
+pub(crate) fn nav_avatar(
+    seed: Option<impl Into<SharedString>>,
+    picture: Option<impl Into<ImageSource>>,
+    cx: &App,
+) -> Option<AnyElement> {
+    if AppSettings::get_hide_avatar(cx) {
+        return None;
+    }
+
+    match (seed.map(Into::into), picture.map(Into::into)) {
+        (None, None) => None,
+        (seed, Some(picture)) => Some(
+            Avatar::from_source(picture)
+                .when_some(seed, |avatar, seed| avatar.seed(seed))
+                .small()
+                .flex_shrink_0()
+                .into_any_element(),
+        ),
+        (Some(seed), None) => Some(
+            PixelAvatar::new(seed)
+                .small()
+                .flex_shrink_0()
+                .into_any_element(),
+        ),
+    }
+}
+
+pub(crate) fn nav_icon(icon: IconName, cx: &App) -> AnyElement {
+    h_flex()
+        .flex_shrink_0()
+        .w(px(20.))
+        .justify_center()
+        .text_color(cx.theme().icon_muted)
+        .child(Icon::new(icon).small())
+        .into_any_element()
+}
+
+/// Brand backgrounds shown behind the signed-out screen; one is picked at random.
+const SIGNED_OUT_BANNERS: [&str; 2] = ["brand/bg1.jpg", "brand/bg2.jpg"];
+
+/// Pick one of the signed-out backgrounds at random.
+pub(crate) fn pick_banner() -> SharedString {
+    let nanos = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map(|elapsed| elapsed.subsec_nanos())
+        .unwrap_or_default();
+    let index = nanos as usize % SIGNED_OUT_BANNERS.len();
+    SIGNED_OUT_BANNERS[index].into()
+}