feat: show block cursors in active text inputs

src/main.rs

@@ -6,6 +6,8 @@
 //! Search and new-tag text: Option/Alt+Backspace or Ctrl-W deletes the previous whitespace word.
 //! Cmd/Super+Backspace or Ctrl-U clears the line; plain Backspace removes one character.
 //! The terminal must transmit modified Backspace; otherwise map it to Ctrl-W or Ctrl-U.
+//! Active text fields show a steady block cursor at the scrolled end; other views hide it.
+//! The terminal's configured default cursor shape is restored when the app exits.
 //! Normal: j/k selects, Enter streams, and i returns to insert mode to edit the query.
 //! Normal-mode d opens the full description; Up/Down scrolls lines and PgUp/PgDn scrolls pages.
 //! The centered popup uses up to 70% width and 60% height, capped at 96 by 20 cells.
@@ -37,7 +39,11 @@ use std::{collections::BTreeMap, ffi::OsString, io, path::PathBuf, time::Duratio
 use clap::Parser;
 use ratatui::{
     DefaultTerminal, Frame,
-    crossterm::event::{self, Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers},
+    crossterm::{
+        cursor::SetCursorStyle,
+        event::{self, Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers},
+        execute,
+    },
     layout::{Constraint, Layout, Rect},
     style::{Color, Style, Stylize},
     text::Line,
@@ -702,19 +708,28 @@ impl App {
         };
         // End-only editing; scroll long queries without counting UTF-8 bytes as columns.
         let query = ratatui::text::Line::raw(self.query.as_str());
-        let scroll = query
-            .width()
-            .saturating_sub(search.width.saturating_sub(3) as usize);
+        let query_width = query.width();
+        let search_block = Block::bordered()
+            .title(" tubular / YouTube search ")
+            .border_style(search_style);
+        let input = search_block.inner(search);
+        let scroll = query_width.saturating_sub(input.width.saturating_sub(1) as usize);
         frame.render_widget(
             Paragraph::new(query)
                 .scroll((0, scroll.min(u16::MAX as usize) as u16))
-                .block(
-                    Block::bordered()
-                        .title(" tubular / YouTube search ")
-                        .border_style(search_style),
-                ),
+                .block(search_block),
             search,
         );
+        if self.mode == Mode::Insert
+            && self.category_dialog.is_none()
+            && input.width != 0
+            && input.height != 0
+        {
+            let cursor = query_width
+                .saturating_sub(scroll)
+                .min(usize::from(input.width - 1));
+            frame.set_cursor_position((input.x + cursor as u16, input.y));
+        }
         let view = &mut self.views[self.view_index];
         let table = Table::new(
             view.videos.iter().map(|video| {
@@ -907,6 +922,14 @@ impl App {
     }
 
     fn run(mut self, terminal: &mut DefaultTerminal) -> io::Result<()> {
+        struct ResetCursorStyle;
+        impl Drop for ResetCursorStyle {
+            fn drop(&mut self) {
+                let _ = execute!(io::stdout(), SetCursorStyle::DefaultUserShape);
+            }
+        }
+        execute!(io::stdout(), SetCursorStyle::SteadyBlock)?;
+        let _cursor_style = ResetCursorStyle;
         self.thumbnail.query_terminal();
         if !self.query.trim().is_empty() {
             self.search();
@@ -991,6 +1014,39 @@ mod tests {
         )
     }
 
+    #[test]
+    fn input_cursor_tracks_display_width_and_stays_inside_scrolled_fields() {
+        use ratatui::{Terminal, backend::TestBackend};
+
+        let mut app = app(&["tubular"]);
+        let mut terminal = Terminal::new(TestBackend::new(24, 20)).unwrap();
+        for (text, x) in [
+            ("", 1),
+            ("ab", 3),
+            ("日本語", 7),
+            ("e\u{301}", 2),
+            ("abcdefghijklmnopqrstuvwxyz", 22),
+        ] {
+            app.query = text.into();
+            terminal.draw(|frame| app.draw(frame)).unwrap();
+            assert_eq!(terminal.get_cursor_position().unwrap(), (x, 2).into());
+        }
+        app.category_dialog = Some(CategoryDialog {
+            channel: String::new(),
+            handle: String::new(),
+            label: String::new(),
+            tags: BTreeMap::new(),
+            selection: ListState::default(),
+            name: Some(String::new()),
+            error: None,
+        });
+        for (text, x) in [("", 3), ("日本語", 9), ("abcdefghijklmnopqrstuvwxyz", 20)] {
+            app.category_dialog.as_mut().unwrap().name = Some(text.into());
+            terminal.draw(|frame| app.draw(frame)).unwrap();
+            assert_eq!(terminal.get_cursor_position().unwrap(), (x, 7).into());
+        }
+    }
+
     #[test]
     fn deletion_shortcuts_edit_search_and_tag_names_without_submitting() {
         for tag_input in [false, true] {