Crosspost targets: one row when they fit, stacked otherwise

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -33,7 +33,7 @@ Running `tuipub` with no account starts the login flow first.
 | Ctrl-R | Reload crosspost targets from the server |
 | Ctrl-O | Open the last published post |
 | Esc | Quit, or back to the post list while editing (asks if there are unsaved changes) |
-| ↑ ↓ / j k, Space, a | Crosspost list: move, toggle, all/none |
+| ← → / ↑ ↓, Space, a | Crosspost list: move, toggle, all/none (one row when they fit, stacked when the window is narrow) |
 
 **Likes and reposts** (StarPunk 2.5.0+): press Ctrl-T, paste the URL into "Like of" / "Repost of", and optionally add a comment. StarPunk turns likes and reposts of fediverse or Bluesky posts into native favourites/boosts when it crossposts; likes of ordinary web pages aren't crossposted. What a like or repost points at can't be changed afterwards, but its comment can.
 

src/app.rs

@@ -792,10 +792,11 @@ impl App {
             return;
         }
         match key.code {
-            KeyCode::Up | KeyCode::Char('k') => {
+            // Up/Down for the stacked layout, Left/Right for the single row.
+            KeyCode::Up | KeyCode::Left | KeyCode::Char('k' | 'h') => {
                 self.target_cursor = self.target_cursor.saturating_sub(1)
             }
-            KeyCode::Down | KeyCode::Char('j') => {
+            KeyCode::Down | KeyCode::Right | KeyCode::Char('j' | 'l') => {
                 self.target_cursor = (self.target_cursor + 1).min(n - 1)
             }
             KeyCode::Char(' ') | KeyCode::Enter => {

src/ui.rs

@@ -9,7 +9,7 @@ use ratatui::{
 };
 
 use crate::app::{App, Discard, Focus, Mode, Posts, Screen, Status, Targets};
-use crate::micropub::{Kind, Post};
+use crate::micropub::{Kind, Post, SyndicationTarget};
 
 const ACCENT: Color = Color::Cyan;
 const DIM: Color = Color::DarkGray;
@@ -77,9 +77,14 @@ fn draw_compose(f: &mut Frame, app: &mut App, area: Rect) -> &'static str {
     let editing = app.editing.is_some();
     let targets_height = match (&app.targets_state, editing) {
         (_, true) => 3,
+        // One row when every target fits side by side, else one per line.
         (Targets::Loaded, false) if !app.targets.is_empty() => {
+            if targets_fit_inline(&app.targets, area.width.saturating_sub(2)) {
+                3
+            } else {
                 (app.targets.len() as u16 + 2).min(8)
             }
+        }
         _ => 3,
     };
     let [title, reply, content, tags, targets] = Layout::vertical([
@@ -125,7 +130,7 @@ fn draw_compose(f: &mut Frame, app: &mut App, area: Rect) -> &'static str {
 
     match (app.focus, editing) {
         (Focus::Syndication, _) => {
-            " ↑↓ move · space toggle · a all/none · Tab next · Ctrl-S publish · Ctrl-P posts · Esc quit"
+            " ←→/↑↓ move · space toggle · a all/none · Tab next · Ctrl-S publish · Ctrl-P posts · Esc quit"
         }
         (_, true) => {
             " Tab next field · Ctrl-S save · Ctrl-N new note · Ctrl-P posts · Esc back to posts"
@@ -164,6 +169,23 @@ fn draw_targets(f: &mut Frame, app: &App, area: Rect) {
                 .block(block),
             area,
         ),
+        Targets::Loaded if targets_fit_inline(&app.targets, area.width.saturating_sub(2)) => {
+            let mut spans = Vec::new();
+            for (i, (t, on)) in app.targets.iter().enumerate() {
+                if i > 0 {
+                    spans.push(Span::raw(INLINE_GAP));
+                }
+                let mut name = Style::default();
+                let mut mark = Style::default().fg(if *on { Color::Green } else { DIM });
+                if focused && i == app.target_cursor {
+                    name = name.add_modifier(Modifier::REVERSED);
+                    mark = mark.add_modifier(Modifier::REVERSED);
+                }
+                spans.push(Span::styled(if *on { "[x] " } else { "[ ] " }, mark));
+                spans.push(Span::styled(t.name.clone(), name));
+            }
+            f.render_widget(Paragraph::new(Line::from(spans)).block(block), area);
+        }
         Targets::Loaded => {
             let items: Vec<ListItem> = app
                 .targets
@@ -189,6 +211,18 @@ fn draw_targets(f: &mut Frame, app: &App, area: Rect) {
     }
 }
 
+const INLINE_GAP: &str = "   ";
+
+/// Whether "[x] Name   [x] Other" fits in `width` columns.
+fn targets_fit_inline(targets: &[(SyndicationTarget, bool)], width: u16) -> bool {
+    let names: usize = targets
+        .iter()
+        .map(|(t, _)| 4 + Line::raw(t.name.as_str()).width())
+        .sum();
+    let gaps = INLINE_GAP.len() * targets.len().saturating_sub(1);
+    names + gaps <= width as usize
+}
+
 /// "2026-11-01T01:02:09.6" -> "2026-11-01 01:02"
 fn short_date(iso: &str) -> String {
     let date = iso.get(..10).unwrap_or(iso);
@@ -474,6 +508,24 @@ fn centered(area: Rect, width: u16, height: u16) -> Rect {
 mod tests {
     use super::*;
 
+    #[test]
+    fn targets_go_inline_when_they_fit() {
+        let t = |n: &str| {
+            (
+                SyndicationTarget {
+                    uid: n.into(),
+                    name: n.into(),
+                },
+                true,
+            )
+        };
+        let targets = [t("GoToSocial"), t("Bluesky")];
+        // "[x] GoToSocial" (14) + gap (3) + "[x] Bluesky" (11) = 28
+        assert!(targets_fit_inline(&targets, 28));
+        assert!(!targets_fit_inline(&targets, 27));
+        assert!(targets_fit_inline(&[], 0));
+    }
+
     #[test]
     fn dates_and_headlines() {
         assert_eq!(short_date("2026-11-01T01:02:09.643392"), "2026-11-01 01:02");