feat: refactor the text parser (#15)

Fix: https://jumble.social/notes/nevent1qvzqqqqqqypzqwlsccluhy6xxsr6l9a9uhhxf75g85g8a709tprjcn4e42h053vaqyvhwumn8ghj7un9d3shjtnjv4ukztnnw5hkjmnzdauqzrnhwden5te0dehhxtnvdakz7qpqpj4awhj4ul6tztlne0v7efvqhthygt0myrlxslpsjh7t6x4esapq3lf5c0
Reviewed-on: #15

Cargo.lock

@@ -1018,10 +1018,12 @@ dependencies = [
  "gpui",
  "gpui_tokio",
  "itertools 0.13.0",
+ "linkify",
  "log",
  "nostr-sdk",
  "once_cell",
  "person",
+ "pulldown-cmark",
  "regex",
  "serde",
  "serde_json",
@@ -1241,6 +1243,7 @@ name = "common"
 version = "1.0.0-beta"
 dependencies = [
  "anyhow",
+ "bech32",
  "chrono",
  "dirs 5.0.1",
  "futures",
@@ -2443,6 +2446,15 @@ dependencies = [
  "windows-link 0.2.1",
 ]
 
+[[package]]
+name = "getopts"
+version = "0.2.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfe4fbac503b8d1f88e6676011885f34b7174f46e59956bba534ba83abded4df"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -3707,6 +3719,15 @@ dependencies = [
  "rust-ini",
 ]
 
+[[package]]
+name = "linkify"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1dfa36d52c581e9ec783a7ce2a5e0143da6237be5811a0b3153fedfdbe9f780"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.4.15"
@@ -4975,6 +4996,25 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "pulldown-cmark"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83c41efbf8f90ac44de7f3a868f0867851d261b56291732d0cbf7cceaaeb55a6"
+dependencies = [
+ "bitflags 2.11.0",
+ "getopts",
+ "memchr",
+ "pulldown-cmark-escape",
+ "unicase",
+]
+
+[[package]]
+name = "pulldown-cmark-escape"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "007d8adb5ddab6f8e3f491ac63566a7d5002cc7ed73901f72057943fa71ae1ae"
+
 [[package]]
 name = "pxfm"
 version = "0.1.27"

crates/chat/src/message.rs

@@ -1,6 +1,7 @@
 use std::hash::Hash;
+use std::ops::Range;
 
-use common::EventUtils;
+use common::{EventUtils, NostrParser};
 use nostr_sdk::prelude::*;
 
 /// New message.
@@ -91,6 +92,18 @@ impl PartialOrd for Message {
     }
 }
 
+#[derive(Debug, Clone)]
+pub struct Mention {
+    pub public_key: PublicKey,
+    pub range: Range<usize>,
+}
+
+impl Mention {
+    pub fn new(public_key: PublicKey, range: Range<usize>) -> Self {
+        Self { public_key, range }
+    }
+}
+
 /// Rendered message.
 #[derive(Debug, Clone)]
 pub struct RenderedMessage {
@@ -102,7 +115,7 @@ pub struct RenderedMessage {
     /// Message created time as unix timestamp
     pub created_at: Timestamp,
     /// List of mentioned public keys in the message
-    pub mentions: Vec<PublicKey>,
+    pub mentions: Vec<Mention>,
     /// List of event of the message this message is a reply to
     pub replies_to: Vec<EventId>,
 }
@@ -184,20 +197,17 @@ impl Hash for RenderedMessage {
 }
 
 /// Extracts all mentions (public keys) from a content string.
-fn extract_mentions(content: &str) -> Vec<PublicKey> {
+fn extract_mentions(content: &str) -> Vec<Mention> {
     let parser = NostrParser::new();
     let tokens = parser.parse(content);
 
     tokens
-        .filter_map(|token| match token {
-            Token::Nostr(nip21) => match nip21 {
-                Nip21::Pubkey(pubkey) => Some(pubkey),
-                Nip21::Profile(profile) => Some(profile.public_key),
-                _ => None,
-            },
+        .filter_map(|token| match token.value {
+            Nip21::Pubkey(public_key) => Some(Mention::new(public_key, token.range)),
+            Nip21::Profile(profile) => Some(Mention::new(profile.public_key, token.range)),
             _ => None,
         })
-        .collect::<Vec<_>>()
+        .collect()
 }
 
 /// Extracts all reply (ids) from the event tags.

crates/chat_ui/Cargo.toml

@@ -28,3 +28,5 @@ serde_json.workspace = true
 
 once_cell = "1.19.0"
 regex = "1"
+linkify = "0.10.0"
+pulldown-cmark = "0.13.1"

crates/chat_ui/src/lib.rs

@@ -8,19 +8,19 @@ use chat::{Message, RenderedMessage, Room, RoomEvent, SendReport};
 use common::RenderedTimestamp;
 use gpui::prelude::FluentBuilder;
 use gpui::{
-    deferred, div, img, list, px, red, relative, svg, white, AnyElement, App, AppContext,
-    ClipboardItem, Context, Entity, EventEmitter, FocusHandle, Focusable, InteractiveElement,
-    IntoElement, ListAlignment, ListOffset, ListState, MouseButton, ObjectFit, ParentElement,
-    PathPromptOptions, Render, SharedString, StatefulInteractiveElement, Styled, StyledImage,
-    Subscription, Task, WeakEntity, Window,
+    AnyElement, App, AppContext, ClipboardItem, Context, Entity, EventEmitter, FocusHandle,
+    Focusable, InteractiveElement, IntoElement, ListAlignment, ListOffset, ListState, MouseButton,
+    ObjectFit, ParentElement, PathPromptOptions, Render, SharedString, StatefulInteractiveElement,
+    Styled, StyledImage, Subscription, Task, WeakEntity, Window, deferred, div, img, list, px, red,
+    relative, svg, white,
 };
 use itertools::Itertools;
 use nostr_sdk::prelude::*;
 use person::{Person, PersonRegistry};
 use settings::{AppSettings, SignerKind};
-use smallvec::{smallvec, SmallVec};
+use smallvec::{SmallVec, smallvec};
 use smol::lock::RwLock;
-use state::{upload, NostrRegistry};
+use state::{NostrRegistry, upload};
 use theme::ActiveTheme;
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
@@ -31,8 +31,8 @@ use ui::menu::{ContextMenuExt, DropdownMenu};
 use ui::notification::Notification;
 use ui::scroll::Scrollbar;
 use ui::{
-    h_flex, v_flex, Disableable, Icon, IconName, InteractiveElementExt, Sizable, StyledExt,
-    WindowExtension,
+    Disableable, Icon, IconName, InteractiveElementExt, Sizable, StyledExt, WindowExtension,
+    h_flex, v_flex,
 };
 
 use crate::text::RenderedText;
@@ -699,10 +699,13 @@ impl ChatPanel {
         if let Some(message) = self.messages.iter().nth(ix) {
             match message {
                 Message::User(rendered) => {
+                    let persons = PersonRegistry::global(cx);
                     let text = self
                         .rendered_texts_by_id
                         .entry(rendered.id)
-                        .or_insert_with(|| RenderedText::new(&rendered.content, cx))
+                        .or_insert_with(|| {
+                            RenderedText::new(&rendered.content, &rendered.mentions, &persons, cx)
+                        })
                         .element(ix.into(), window, cx);
 
                     self.render_text_message(ix, rendered, text, cx)

crates/chat_ui/src/text.rs

@@ -1,29 +1,29 @@
 use std::ops::Range;
 use std::sync::Arc;
 
+use chat::Mention;
+use common::RangeExt;
 use gpui::{
-    AnyElement, App, ElementId, HighlightStyle, InteractiveText, IntoElement, SharedString,
-    StyledText, UnderlineStyle, Window,
+    AnyElement, App, ElementId, Entity, FontStyle, FontWeight, HighlightStyle, InteractiveText,
+    IntoElement, SharedString, StrikethroughStyle, StyledText, UnderlineStyle, Window,
 };
-use nostr_sdk::prelude::*;
-use once_cell::sync::Lazy;
 use person::PersonRegistry;
-use regex::Regex;
 use theme::ActiveTheme;
 
-use crate::actions::OpenPublicKey;
-
-static URL_REGEX: Lazy<Regex> = Lazy::new(|| {
-    Regex::new(r"(?i)(?:^|\s)(?:https?://)?(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z]{2,}(?::\d+)?(?:/[^\s]*)?(?:\s|$)").unwrap()
-});
-
-static NOSTR_URI_REGEX: Lazy<Regex> =
-    Lazy::new(|| Regex::new(r"nostr:(npub|note|nprofile|nevent|naddr)[a-zA-Z0-9]+").unwrap());
-
+#[allow(clippy::enum_variant_names)]
+#[allow(dead_code)]
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Highlight {
-    Link,
-    Nostr,
+    Code,
+    InlineCode(bool),
+    Highlight(HighlightStyle),
+    Mention,
+}
+
+impl From<HighlightStyle> for Highlight {
+    fn from(style: HighlightStyle) -> Self {
+        Self::Highlight(style)
+    }
 }
 
 #[derive(Default)]
@@ -35,7 +35,12 @@ pub struct RenderedText {
 }
 
 impl RenderedText {
-    pub fn new(content: &str, cx: &App) -> Self {
+    pub fn new(
+        content: &str,
+        mentions: &[Mention],
+        persons: &Entity<PersonRegistry>,
+        cx: &App,
+    ) -> Self {
         let mut text = String::new();
         let mut highlights = Vec::new();
         let mut link_ranges = Vec::new();
@@ -43,10 +48,12 @@ impl RenderedText {
 
         render_plain_text_mut(
             content,
+            mentions,
             &mut text,
             &mut highlights,
             &mut link_ranges,
             &mut link_urls,
+            persons,
             cx,
         );
 
@@ -61,7 +68,7 @@ impl RenderedText {
     }
 
     pub fn element(&self, id: ElementId, window: &Window, cx: &App) -> AnyElement {
-        let link_color = cx.theme().text_accent;
+        let code_background = cx.theme().elevated_surface_background;
 
         InteractiveText::new(
             id,
@@ -71,15 +78,35 @@ impl RenderedText {
                     (
                         range.clone(),
                         match highlight {
-                            Highlight::Link => HighlightStyle {
-                                color: Some(link_color),
-                                underline: Some(UnderlineStyle::default()),
+                            Highlight::Code => HighlightStyle {
+                                background_color: Some(code_background),
                                 ..Default::default()
                             },
-                            Highlight::Nostr => HighlightStyle {
-                                color: Some(link_color),
+                            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 {
+                                underline: Some(UnderlineStyle {
+                                    thickness: 1.0.into(),
+                                    ..Default::default()
+                                }),
                                 ..Default::default()
                             },
+                            Highlight::Highlight(highlight) => *highlight,
                         },
                     )
                 }),
@@ -87,22 +114,10 @@ impl RenderedText {
         )
         .on_click(self.link_ranges.clone(), {
             let link_urls = self.link_urls.clone();
-            move |ix, window, cx| {
-                let token = link_urls[ix].as_str();
-
-                if let Some(clean_url) = token.strip_prefix("nostr:") {
-                    if let Ok(public_key) = PublicKey::parse(clean_url) {
-                        window.dispatch_action(Box::new(OpenPublicKey(public_key)), cx);
-                    }
-                } else if is_url(token) {
-                    let url = if token.starts_with("http") {
-                        token.to_string()
-                    } else {
-                        format!("https://{token}")
-                    };
-                    cx.open_url(&url);
-                } else {
-                    log::warn!("Unrecognized token {token}")
+            move |ix, _, cx| {
+                let url = &link_urls[ix];
+                if url.starts_with("http") {
+                    cx.open_url(url);
                 }
             }
         })
@@ -110,214 +125,273 @@ impl RenderedText {
     }
 }
 
+#[allow(clippy::too_many_arguments)]
 fn render_plain_text_mut(
-    content: &str,
+    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>,
+    persons: &Entity<PersonRegistry>,
     cx: &App,
 ) {
-    // Copy the content directly
-    text.push_str(content);
+    use pulldown_cmark::{Event, Options, Parser, Tag, TagEnd};
 
-    // Collect all URLs
-    let mut url_matches: Vec<(Range<usize>, String)> = Vec::new();
+    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();
 
-    for link in URL_REGEX.find_iter(content) {
-        let range = link.start()..link.end();
-        let url = link.as_str().to_string();
+    let mut options = Options::all();
+    options.remove(pulldown_cmark::Options::ENABLE_DEFINITION_LIST);
 
-        url_matches.push((range, url));
-    }
+    for (event, source_range) in Parser::new_ext(block, options).into_offset_iter() {
+        let prev_len = text.len();
 
-    // Collect all nostr entities with nostr: prefix
-    let mut nostr_matches: Vec<(Range<usize>, String)> = Vec::new();
+        match event {
+            Event::Text(t) => {
+                // Process text with mention replacements
+                let t_str = t.as_ref();
+                let mut last_processed = 0;
 
-    for nostr_match in NOSTR_URI_REGEX.find_iter(content) {
-        let range = nostr_match.start()..nostr_match.end();
-        let nostr_uri = nostr_match.as_str().to_string();
+                while let Some(mention) = mentions.first() {
+                    if !source_range.contains_inclusive(&mention.range) {
+                        break;
+                    }
 
-        // Check if this nostr URI overlaps with any already processed URL
-        if !url_matches
-            .iter()
-            .any(|(url_range, _)| url_range.start < range.end && range.start < url_range.end)
-        {
-            nostr_matches.push((range, nostr_uri));
-        }
-    }
+                    // Calculate positions within the current text
+                    let mention_start_in_text = mention.range.start - source_range.start;
+                    let mention_end_in_text = mention.range.end - source_range.start;
 
-    // Combine all matches for processing from end to start
-    let mut all_matches = Vec::new();
-    all_matches.extend(url_matches);
-    all_matches.extend(nostr_matches);
+                    // 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,
+                            prev_len + last_processed,
+                            bold_depth,
+                            italic_depth,
+                            strikethrough_depth,
+                            link_url.clone(),
+                            text,
+                            highlights,
+                            link_ranges,
+                            link_urls,
+                        );
+                    }
 
-    // Sort by position (end to start) to avoid changing positions when replacing text
-    all_matches.sort_by(|(range_a, _), (range_b, _)| range_b.start.cmp(&range_a.start));
+                    // Process the mention replacement
+                    let profile = persons.read(cx).get(&mention.public_key, cx);
+                    let replacement_text = format!("@{}", profile.name());
 
-    // Process all matches
-    for (range, entity) in all_matches {
-        // Handle URL token
-        if is_url(&entity) {
-            highlights.push((range.clone(), Highlight::Link));
-            link_ranges.push(range);
-            link_urls.push(entity);
-            continue;
-        };
+                    let replacement_start = text.len();
+                    text.push_str(&replacement_text);
+                    let replacement_end = text.len();
 
-        if let Ok(nip21) = Nip21::parse(&entity) {
-            match nip21 {
-                Nip21::Pubkey(public_key) => {
-                    render_pubkey(
-                        public_key,
-                        text,
-                        &range,
-                        highlights,
-                        link_ranges,
-                        link_urls,
-                        cx,
-                    );
+                    highlights.push((replacement_start..replacement_end, Highlight::Mention));
+
+                    last_processed = mention_end_in_text;
+                    mentions = &mentions[1..];
                 }
-                Nip21::Profile(nip19_profile) => {
-                    render_pubkey(
-                        nip19_profile.public_key,
+
+                // 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,
+                        prev_len + last_processed,
+                        bold_depth,
+                        italic_depth,
+                        strikethrough_depth,
+                        link_url.clone(),
                         text,
-                        &range,
-                        highlights,
-                        link_ranges,
-                        link_urls,
-                        cx,
-                    );
-                }
-                Nip21::EventId(event_id) => {
-                    render_bech32(
-                        event_id.to_bech32().unwrap(),
-                        text,
-                        &range,
-                        highlights,
-                        link_ranges,
-                        link_urls,
-                    );
-                }
-                Nip21::Event(nip19_event) => {
-                    render_bech32(
-                        nip19_event.to_bech32().unwrap(),
-                        text,
-                        &range,
-                        highlights,
-                        link_ranges,
-                        link_urls,
-                    );
-                }
-                Nip21::Coordinate(nip19_coordinate) => {
-                    render_bech32(
-                        nip19_coordinate.to_bech32().unwrap(),
-                        text,
-                        &range,
                         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);
+                }
+                Tag::Emphasis => italic_depth += 1,
+                Tag::Strong => bold_depth += 1,
+                Tag::Strikethrough => strikethrough_depth += 1,
+                Tag::Link { dest_url, .. } => link_url = Some(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::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::HardBreak => text.push('\n'),
+            Event::SoftBreak => text.push('\n'),
+            _ => {}
         }
     }
 }
 
-/// Check if a string is a URL
-fn is_url(s: &str) -> bool {
-    URL_REGEX.is_match(s)
-}
+#[allow(clippy::too_many_arguments)]
+fn process_text_segment(
+    segment: &str,
+    segment_start: usize,
+    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()
+        });
+    }
 
-/// Format a bech32 entity with ellipsis and last 4 characters
-fn format_shortened_entity(entity: &str) -> String {
-    let prefix_end = entity.find('1').unwrap_or(0);
+    // Add the text
+    text.push_str(segment);
+    let text_end = text.len();
 
-    if prefix_end > 0 && entity.len() > prefix_end + 5 {
-        let prefix = &entity[0..=prefix_end]; // Include the '1'
-        let suffix = &entity[entity.len() - 4..]; // Last 4 chars
+    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()
+        });
 
-        format!("{prefix}...{suffix}")
+        // Add highlight for the entire linked segment
+        if style != HighlightStyle::default() {
+            highlights.push((segment_start..text_end, Highlight::Highlight(style)));
+        }
     } else {
-        entity.to_string()
-    }
-}
+        // Handle link detection within the segment
+        let mut finder = linkify::LinkFinder::new();
+        finder.kinds(&[linkify::LinkKind::Url]);
+        let mut last_link_pos = 0;
 
-fn render_pubkey(
-    public_key: PublicKey,
-    text: &mut String,
-    range: &Range<usize>,
-    highlights: &mut Vec<(Range<usize>, Highlight)>,
-    link_ranges: &mut Vec<Range<usize>>,
-    link_urls: &mut Vec<String>,
-    cx: &App,
-) {
-    let persons = PersonRegistry::global(cx);
-    let profile = persons.read(cx).get(&public_key, cx);
-    let display_name = format!("@{}", profile.name());
+        for link in finder.links(segment) {
+            let start = link.start();
+            let end = link.end();
 
-    text.replace_range(range.clone(), &display_name);
+            // 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;
 
-    let new_length = display_name.len();
-    let length_diff = new_length as isize - (range.end - range.start) as isize;
-    let new_range = range.start..(range.start + new_length);
+                if style != HighlightStyle::default() {
+                    highlights.push((non_link_start..non_link_end, Highlight::Highlight(style)));
+                }
+            }
 
-    highlights.push((new_range.clone(), Highlight::Nostr));
-    link_ranges.push(new_range);
-    link_urls.push(format!("nostr:{}", profile.public_key().to_hex()));
+            // Add the link
+            let range = (segment_start + start)..(segment_start + end);
+            link_ranges.push(range.clone());
+            link_urls.push(link.as_str().to_string());
 
-    if length_diff != 0 {
-        adjust_ranges(highlights, link_ranges, range.end, length_diff);
-    }
-}
+            // Apply link styling (underline + existing style)
+            let mut link_style = style;
+            link_style.underline = Some(UnderlineStyle {
+                thickness: 1.0.into(),
+                ..Default::default()
+            });
 
-fn render_bech32(
-    bech32: String,
-    text: &mut String,
-    range: &Range<usize>,
-    highlights: &mut Vec<(Range<usize>, Highlight)>,
-    link_ranges: &mut Vec<Range<usize>>,
-    link_urls: &mut Vec<String>,
-) {
-    let njump_url = format!("https://njump.me/{bech32}");
-    let shortened_entity = format_shortened_entity(&bech32);
-    let display_text = format!("https://njump.me/{shortened_entity}");
+            highlights.push((range, Highlight::Highlight(link_style)));
 
-    text.replace_range(range.clone(), &display_text);
-
-    let new_length = display_text.len();
-    let length_diff = new_length as isize - (range.end - range.start) as isize;
-    let new_range = range.start..(range.start + new_length);
-
-    highlights.push((new_range.clone(), Highlight::Link));
-    link_ranges.push(new_range);
-    link_urls.push(njump_url);
-
-    if length_diff != 0 {
-        adjust_ranges(highlights, link_ranges, range.end, length_diff);
-    }
-}
-
-// Helper function to adjust ranges when text length changes
-fn adjust_ranges(
-    highlights: &mut [(Range<usize>, Highlight)],
-    link_ranges: &mut [Range<usize>],
-    position: usize,
-    length_diff: isize,
-) {
-    // Adjust highlight ranges
-    for (range, _) in highlights.iter_mut() {
-        if range.start > position {
-            range.start = (range.start as isize + length_diff) as usize;
-            range.end = (range.end as isize + length_diff) as usize;
+            last_link_pos = end;
         }
-    }
 
-    // Adjust link ranges
-    for range in link_ranges.iter_mut() {
-        if range.start > position {
-            range.start = (range.start as isize + length_diff) as usize;
-            range.end = (range.end as isize + length_diff) as usize;
+        // 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/common/Cargo.toml

@@ -19,3 +19,4 @@ log.workspace = true
 
 dirs = "5.0"
 qrcode = "0.14.1"
+bech32 = "0.11.1"

crates/common/src/lib.rs

@@ -1,9 +1,13 @@
 pub use debounced_delay::*;
 pub use display::*;
 pub use event::*;
+pub use parser::*;
 pub use paths::*;
+pub use range::*;
 
 mod debounced_delay;
 mod display;
 mod event;
+mod parser;
 mod paths;
+mod range;

crates/common/src/parser.rs

@@ -0,0 +1,210 @@
+use std::ops::Range;
+
+use nostr::prelude::*;
+
+const BECH32_SEPARATOR: u8 = b'1';
+const SCHEME_WITH_COLON: &str = "nostr:";
+
+/// Nostr parsed token with its range in the original text
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Token {
+    /// The parsed NIP-21 URI
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/21.md>
+    pub value: Nip21,
+    /// The range of this token in the original text
+    pub range: Range<usize>,
+}
+
+#[derive(Debug, Clone, Copy)]
+struct Match {
+    start: usize,
+    end: usize,
+}
+
+/// Nostr parser
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct NostrParser;
+
+impl Default for NostrParser {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl NostrParser {
+    /// Create new parser
+    pub const fn new() -> Self {
+        Self
+    }
+
+    /// Parse text
+    pub fn parse<'a>(&self, text: &'a str) -> NostrParserIter<'a> {
+        NostrParserIter::new(text)
+    }
+}
+
+struct FindMatches<'a> {
+    bytes: &'a [u8],
+    pos: usize,
+}
+
+impl<'a> FindMatches<'a> {
+    fn new(text: &'a str) -> Self {
+        Self {
+            bytes: text.as_bytes(),
+            pos: 0,
+        }
+    }
+
+    fn try_parse_nostr_uri(&mut self) -> Option<Match> {
+        let start = self.pos;
+        let bytes = self.bytes;
+        let len = bytes.len();
+
+        // Check if we have "nostr:" prefix
+        if len - start < SCHEME_WITH_COLON.len() {
+            return None;
+        }
+
+        // Check for "nostr:" prefix (case-insensitive)
+        let scheme_prefix = &bytes[start..start + SCHEME_WITH_COLON.len()];
+        if !scheme_prefix.eq_ignore_ascii_case(SCHEME_WITH_COLON.as_bytes()) {
+            return None;
+        }
+
+        // Skip the scheme
+        let pos = start + SCHEME_WITH_COLON.len();
+
+        // Parse bech32 entity
+        let mut has_separator = false;
+        let mut end = pos;
+
+        while end < len {
+            let byte = bytes[end];
+
+            // Check for bech32 separator
+            if byte == BECH32_SEPARATOR && !has_separator {
+                has_separator = true;
+                end += 1;
+                continue;
+            }
+
+            // Check if character is valid for bech32
+            if !byte.is_ascii_alphanumeric() {
+                break;
+            }
+
+            end += 1;
+        }
+
+        // Must have at least one character after separator
+        if !has_separator || end <= pos + 1 {
+            return None;
+        }
+
+        // Update position
+        self.pos = end;
+
+        Some(Match { start, end })
+    }
+}
+
+impl Iterator for FindMatches<'_> {
+    type Item = Match;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        while self.pos < self.bytes.len() {
+            // Try to parse nostr URI
+            if let Some(mat) = self.try_parse_nostr_uri() {
+                return Some(mat);
+            }
+
+            // Skip one character if no match found
+            self.pos += 1;
+        }
+
+        None
+    }
+}
+
+enum HandleMatch {
+    Token(Token),
+    Recursion,
+}
+
+pub struct NostrParserIter<'a> {
+    /// The original text
+    text: &'a str,
+    /// Matches found
+    matches: FindMatches<'a>,
+    /// A pending match
+    pending_match: Option<Match>,
+    /// Last match end index
+    last_match_end: usize,
+}
+
+impl<'a> NostrParserIter<'a> {
+    fn new(text: &'a str) -> Self {
+        Self {
+            text,
+            matches: FindMatches::new(text),
+            pending_match: None,
+            last_match_end: 0,
+        }
+    }
+
+    fn handle_match(&mut self, mat: Match) -> HandleMatch {
+        // Update last match end
+        self.last_match_end = mat.end;
+
+        // Extract the matched string
+        let data: &str = &self.text[mat.start..mat.end];
+
+        // Parse NIP-21 URI
+        match Nip21::parse(data) {
+            Ok(uri) => HandleMatch::Token(Token {
+                value: uri,
+                range: mat.start..mat.end,
+            }),
+            // If the nostr URI parsing is invalid, skip it
+            Err(_) => HandleMatch::Recursion,
+        }
+    }
+}
+
+impl<'a> Iterator for NostrParserIter<'a> {
+    type Item = Token;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        // Handle a pending match
+        if let Some(pending_match) = self.pending_match.take() {
+            return match self.handle_match(pending_match) {
+                HandleMatch::Token(token) => Some(token),
+                HandleMatch::Recursion => self.next(),
+            };
+        }
+
+        match self.matches.next() {
+            Some(mat) => {
+                // Skip any text before this match
+                if mat.start > self.last_match_end {
+                    // Update pending match
+                    // This will be handled at next iteration, in `handle_match` method.
+                    self.pending_match = Some(mat);
+
+                    // Skip the text before the match
+                    self.last_match_end = mat.start;
+                    return self.next();
+                }
+
+                // Handle match
+                match self.handle_match(mat) {
+                    HandleMatch::Token(token) => Some(token),
+                    HandleMatch::Recursion => self.next(),
+                }
+            }
+            None => None,
+        }
+    }
+}

crates/common/src/range.rs

@@ -0,0 +1,45 @@
+use std::cmp::{self};
+use std::ops::{Range, RangeInclusive};
+
+pub trait RangeExt<T> {
+    fn sorted(&self) -> Self;
+    fn to_inclusive(&self) -> RangeInclusive<T>;
+    fn overlaps(&self, other: &Range<T>) -> bool;
+    fn contains_inclusive(&self, other: &Range<T>) -> bool;
+}
+
+impl<T: Ord + Clone> RangeExt<T> for Range<T> {
+    fn sorted(&self) -> Self {
+        cmp::min(&self.start, &self.end).clone()..cmp::max(&self.start, &self.end).clone()
+    }
+
+    fn to_inclusive(&self) -> RangeInclusive<T> {
+        self.start.clone()..=self.end.clone()
+    }
+
+    fn overlaps(&self, other: &Range<T>) -> bool {
+        self.start < other.end && other.start < self.end
+    }
+
+    fn contains_inclusive(&self, other: &Range<T>) -> bool {
+        self.start <= other.start && other.end <= self.end
+    }
+}
+
+impl<T: Ord + Clone> RangeExt<T> for RangeInclusive<T> {
+    fn sorted(&self) -> Self {
+        cmp::min(self.start(), self.end()).clone()..=cmp::max(self.start(), self.end()).clone()
+    }
+
+    fn to_inclusive(&self) -> RangeInclusive<T> {
+        self.clone()
+    }
+
+    fn overlaps(&self, other: &Range<T>) -> bool {
+        self.start() < &other.end && &other.start <= self.end()
+    }
+
+    fn contains_inclusive(&self, other: &Range<T>) -> bool {
+        self.start() <= &other.start && &other.end <= self.end()
+    }
+}

crates/coop/src/workspace.rs

@@ -5,14 +5,14 @@ use chat::{ChatEvent, ChatRegistry, InboxState};
 use device::DeviceRegistry;
 use gpui::prelude::FluentBuilder;
 use gpui::{
-    div, px, Action, App, AppContext, Axis, Context, Entity, InteractiveElement, IntoElement,
-    ParentElement, Render, SharedString, Styled, Subscription, Window,
+    Action, App, AppContext, Axis, Context, Entity, InteractiveElement, IntoElement, ParentElement,
+    Render, SharedString, Styled, Subscription, Window, div, px,
 };
 use person::PersonRegistry;
 use serde::Deserialize;
-use smallvec::{smallvec, SmallVec};
+use smallvec::{SmallVec, smallvec};
 use state::{NostrRegistry, RelayState, SignerEvent};
-use theme::{ActiveTheme, Theme, ThemeRegistry, SIDEBAR_WIDTH};
+use theme::{ActiveTheme, SIDEBAR_WIDTH, Theme, ThemeRegistry};
 use title_bar::TitleBar;
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
@@ -21,14 +21,13 @@ use ui::dock_area::panel::PanelView;
 use ui::dock_area::{ClosePanel, DockArea, DockItem};
 use ui::menu::{DropdownMenu, PopupMenuItem};
 use ui::notification::Notification;
-use ui::{h_flex, v_flex, IconName, Root, Sizable, WindowExtension};
+use ui::{IconName, Root, Sizable, WindowExtension, h_flex, v_flex};
 
 use crate::dialogs::{accounts, settings};
 use crate::panels::{backup, contact_list, greeter, messaging_relays, profile, relay_list};
 use crate::sidebar;
 
-const ENC_MSG: &str =
-    "Encryption Key is a special key that used to encrypt and decrypt your messages. \
+const ENC_MSG: &str = "Encryption Key is a special key that used to encrypt and decrypt your messages. \
      Your identity is completely decoupled from all encryption processes to protect your privacy.";
 
 const ENC_WARN: &str = "By resetting your encryption key, you will lose access to \

crates/ui/src/root.rs

@@ -2,10 +2,10 @@ use std::rc::Rc;
 
 use gpui::prelude::FluentBuilder;
 use gpui::{
-    canvas, div, point, px, size, AnyView, App, AppContext, Bounds, Context, CursorStyle,
-    Decorations, Edges, Entity, FocusHandle, HitboxBehavior, Hsla, InteractiveElement, IntoElement,
-    MouseButton, ParentElement as _, Pixels, Point, Render, ResizeEdge, SharedString, Size, Styled,
-    Tiling, WeakFocusHandle, Window,
+    AnyView, App, AppContext, Bounds, Context, CursorStyle, Decorations, Edges, Entity,
+    FocusHandle, HitboxBehavior, Hsla, InteractiveElement, IntoElement, MouseButton,
+    ParentElement as _, Pixels, Point, Render, ResizeEdge, SharedString, Size, Styled, Tiling,
+    WeakFocusHandle, Window, canvas, div, point, px, size,
 };
 use theme::{
     ActiveTheme, CLIENT_SIDE_DECORATION_BORDER, CLIENT_SIDE_DECORATION_ROUNDING,

rustfmt.toml

@@ -1,3 +1,5 @@
+edition = "2024"
+style_edition = "2024"
 tab_spaces = 4
 newline_style = "Auto"
 reorder_imports = true