fix: highlight all search matches before word navigation

docs/editing.md

@@ -170,13 +170,13 @@ The last recipe is session-wide across buffers, but pending Insert groups and un
 
 ## Search
 
-Search is case-sensitive and single-line, with no regular expressions or Unicode normalization. Matches start and end on whole grapheme boundaries, including combining marks and emoji. Next/previous navigation skips the current position and wraps through the buffer; a sole match wraps back to itself. The active match is highlighted yellow.
+Search is case-sensitive and single-line, with no regular expressions or Unicode normalization. Matches start and end on whole grapheme boundaries, including combining marks and emoji. Next/previous navigation skips the current position and wraps through the buffer; a sole match wraps back to itself. All occurrences of the active query are highlighted yellow.
 
-Normal `*` searches forward for the primary caret's word and highlights the destination in one action. It uses the same Unicode letters/digits/underscore boundaries as `w`, so `cat` skips `scatter`, `cat_cat`, and `cat2`. If the caret is not on a keyword, it takes the next keyword on that line; with none, it uses the punctuation run under or after the caret as a literal substring. A blank remainder reports no word and preserves the previous search. Counts such as `2*` skip to the requested occurrence; every caret searches the primary word from its own position. This also works in read-only diff text. Bind `config.core.search_word` to remap it.
+Normal `*` highlights the primary caret's word without moving any caret when it selects a new query or changes the matching mode. Pressing `*` again for the same active word navigates forward; counts such as `2*` then skip to the requested occurrence, with every caret searching the primary word from its own position. Selecting a different word starts a new highlight-only search. It uses the same Unicode letters/digits/underscore boundaries as `w`, so `cat` skips `scatter`, `cat_cat`, and `cat2`. If the caret is not on a keyword, it takes the next keyword on that line; with none, it uses the punctuation run under or after the caret as a literal substring. A blank remainder reports no word and preserves the previous search. This also works in read-only diff text. Bind `config.core.search_word` to remap it.
 
 `n`/`N` and an empty `/` submission retain the whole-word setting; a nonempty `/` query returns to literal substring search. Cancelling `/` preserves both the previous query and its matching behavior.
 
-Submitting an empty search repeats the last query. Esc cancels without moving the cursor or replacing the previous query/match. A missing match reports the query, clears the highlight, and leaves the cursor unchanged; searching without a previous query also leaves the cursor unchanged. Search never edits text or adds undo history. Buffer edits and undo/redo clear the highlight but retain the query, so subsequent navigation searches the current text again.
+Submitting an empty search repeats the last query. Esc cancels without moving the cursor or replacing the previous query/match. A missing match reports the query and leaves the cursor unchanged; searching without a previous query also leaves the cursor unchanged. Search never edits text or adds undo history. Buffer edits and undo/redo retain the query and recompute its visible highlights, so subsequent navigation searches the current text again.
 
 ## Commands, saving, and pasted input
 

src/editor.rs

@@ -6490,6 +6490,18 @@ impl Editor {
     pub fn search_match(&self) -> Option<SearchMatch> {
         self.active.view.search_match
     }
+    pub fn search_matches_on_row(&self, row: usize) -> impl Iterator<Item = SearchMatch> + '_ {
+        let query = self.active.view.search_query.as_str();
+        let line = &self.active.lines[row];
+        let columns = grapheme_count(query);
+        search_match_bytes(line, query, self.active.view.search_whole_word).map(move |byte| {
+            let column = column_after_byte(line, byte);
+            SearchMatch {
+                start: Cursor { row, column },
+                end_column: column + columns,
+            }
+        })
+    }
     /// Whole-row shape belongs to the active buffer, not the Visual binding context.
     pub fn visual_linewise(&self) -> bool {
         self.active.view.mode == Mode::Visual && self.active.view.linewise
@@ -8412,7 +8424,7 @@ impl Editor {
         None
     }
 
-    fn set_word_search(&mut self) -> Option<Cursor> {
+    fn set_word_search(&mut self) -> Option<(Cursor, bool)> {
         let cursor = self.cursor();
         let line = &self.active.lines[cursor.row];
         let origin = grapheme_byte(line, cursor.column);
@@ -8438,25 +8450,41 @@ impl Editor {
         let end = tokens()
             .find(|(position, next)| *position > byte && *next != kind)
             .map_or(line.len(), |(position, _)| position);
-        self.active.view.search_query = line[start..end].into();
+        let query = &line[start..end];
-        self.active.view.search_whole_word = kind == WordKind::Keyword;
+        let whole_word = kind == WordKind::Keyword;
-        Some(Cursor {
+        let newly_active = self.active.view.search_query != query
-            row: cursor.row,
+            || self.active.view.search_whole_word != whole_word;
-            column: column_after_byte(line, start),
+        if newly_active {
-        })
+            self.active.view.search_query = query.into();
+            self.active.view.search_whole_word = whole_word;
+        }
+        Some((
+            Cursor {
+                row: cursor.row,
+                column: column_after_byte(line, start),
+            },
+            newly_active,
+        ))
     }
 
     fn seek_search(&mut self, action: Action, count: usize) {
         self.reveal_caret();
-        let source = self.jump_location();
         let primary_origin = if action == Action::SearchWord {
-            Some(match self.set_word_search() {
+            let Some((origin, newly_active)) = self.set_word_search() else {
-                Some(origin) => origin,
+                return;
-                None => return,
+            };
-            })
+            if newly_active {
+                self.active.view.search_match = Some(SearchMatch {
+                    start: origin,
+                    end_column: origin.column + grapheme_count(&self.active.view.search_query),
+                });
+                return;
+            }
+            Some(origin)
         } else {
             None
         };
+        let source = self.jump_location();
         let forward = action != Action::SearchPrevious;
         self.active.view.search_match = None;
         if self.active.view.search_query.is_empty() {
@@ -8470,22 +8498,7 @@ impl Editor {
             .navigable_rows(0, self.active.lines.len())
             .flat_map(|row| {
                 let line = &self.active.lines[row];
-                line.grapheme_indices(true).filter_map(move |(byte, _)| {
+                search_match_bytes(line, query, whole_word).map(move |byte| (row, byte))
-                    (line[byte..].starts_with(query)
-                        && GraphemeCursor::new(byte + query.len(), line.len(), true)
-                            .is_boundary(line, 0)
-                            .expect("complete line supplies grapheme context")
-                        && (!whole_word
-                            || (line[..byte]
-                                .graphemes(true)
-                                .next_back()
-                                .is_none_or(|g| word_kind(g, false) != WordKind::Keyword)
-                                && line[byte + query.len()..]
-                                    .graphemes(true)
-                                    .next()
-                                    .is_none_or(|g| word_kind(g, false) != WordKind::Keyword))))
-                    .then_some((row, byte))
-                })
             })
             .collect();
         if matches.is_empty() {
@@ -11927,6 +11940,30 @@ enum WordKind {
     EmptyLine,
 }
 
+fn search_match_bytes<'a>(
+    line: &'a str,
+    query: &'a str,
+    whole_word: bool,
+) -> impl Iterator<Item = usize> + 'a {
+    let line = if query.is_empty() { "" } else { line };
+    line.grapheme_indices(true).filter_map(move |(byte, _)| {
+        (line[byte..].starts_with(query)
+            && GraphemeCursor::new(byte + query.len(), line.len(), true)
+                .is_boundary(line, 0)
+                .expect("complete line supplies grapheme context")
+            && (!whole_word
+                || (line[..byte]
+                    .graphemes(true)
+                    .next_back()
+                    .is_none_or(|g| word_kind(g, false) != WordKind::Keyword)
+                    && line[byte + query.len()..]
+                        .graphemes(true)
+                        .next()
+                        .is_none_or(|g| word_kind(g, false) != WordKind::Keyword))))
+        .then_some(byte)
+    })
+}
+
 fn word_kind(grapheme: &str, big: bool) -> WordKind {
     let ch = grapheme.chars().next().expect("graphemes are nonempty");
     if ch.is_whitespace() {

src/tui.rs

@@ -3122,7 +3122,7 @@ fn paint_editor_line(
             paint_grapheme_range(frame, area, left, line, start..end, style);
         }
     }
-    if let Some(found) = editor.search_match().filter(|found| found.start.row == row) {
+    for found in editor.search_matches_on_row(row) {
         paint_cells(
             frame,
             area,
@@ -18877,6 +18877,73 @@ end
         assert_ne!(buffer[(6, 0)].bg, Color::Blue);
     }
 
+    #[test]
+    fn search_highlights_all_occurrences_without_moving_on_first_star() {
+        let mut editor = Editor::open(None, vec![]).unwrap();
+        editor.set_gutter_style(crate::gutter::GutterStyle::None);
+        configure_chrome(&mut editor, |top, bottom| {
+            for bar in [top, bottom] {
+                bar.left.clear();
+                bar.center.clear();
+                bar.right.clear();
+            }
+        });
+        editor
+            .apply(vec![crate::editor::Effect::Replace(
+                "cat cat_cat cat\ncat".into(),
+            )])
+            .unwrap();
+        editor.handle(Input::Char('*'));
+        assert_eq!(editor.cursor(), Cursor::default());
+        let mut terminal = Terminal::new(ratatui::backend::TestBackend::new(30, 6)).unwrap();
+        let (mut top, mut left) = (0, 0);
+        let mut syntax = SyntaxCache::new();
+        terminal
+            .draw(|frame| {
+                draw(
+                    frame,
+                    &editor,
+                    &mut top,
+                    &mut left,
+                    &mut syntax,
+                    &mut DocumentViewport::default(),
+                    &mut WheelPanels::default(),
+                );
+            })
+            .unwrap();
+        let buffer = terminal.backend().buffer();
+        for (row, start, end) in [(0, 0, 3), (0, 12, 15), (1, 0, 3)] {
+            for column in start..end {
+                assert_eq!(buffer[(column + 2, row)].bg, Color::Yellow);
+            }
+        }
+        assert_ne!(buffer[(6, 0)].bg, Color::Yellow);
+        editor.handle(Input::Char('/'));
+        for ch in "cat".chars() {
+            editor.handle(Input::Char(ch));
+        }
+        editor.handle(Input::Enter);
+        terminal
+            .draw(|frame| {
+                draw(
+                    frame,
+                    &editor,
+                    &mut top,
+                    &mut left,
+                    &mut syntax,
+                    &mut DocumentViewport::default(),
+                    &mut WheelPanels::default(),
+                );
+            })
+            .unwrap();
+        for column in [0, 4, 8, 12] {
+            assert_eq!(
+                terminal.backend().buffer()[(column + 2, 0)].bg,
+                Color::Yellow
+            );
+        }
+    }
+
     #[test]
     fn active_search_highlight_uses_display_cells_and_clips_with_horizontal_scroll() {
         let mut editor = Editor::open(None, vec![]).unwrap();

tests/navigation.rs

@@ -120,12 +120,35 @@ fn wait_until(session: &mut EditorSession, ready: impl Fn(&EditorSession) -> boo
     }
 }
 
+#[test]
+fn star_search_arms_without_moving_then_navigates_and_rearms_for_a_new_word_or_mode() {
+    let fixture = Fixture::new();
+    let mut editor = fixture.editor("cat dog cat dog");
+    keys(&mut editor, "l2*");
+    assert_eq!(editor.cursor(), Cursor { row: 0, column: 1 });
+    assert_eq!(editor.search_match().unwrap().start, Cursor::default());
+    keys(&mut editor, "*");
+    assert_eq!(editor.cursor(), Cursor { row: 0, column: 8 });
+    keys(&mut editor, "w*");
+    assert_eq!(editor.cursor(), Cursor { row: 0, column: 12 });
+    keys(&mut editor, "*");
+    assert_eq!(editor.cursor(), Cursor { row: 0, column: 4 });
+
+    keys(&mut editor, "/cat");
+    editor.handle(Input::Enter);
+    assert_eq!(editor.cursor(), Cursor { row: 0, column: 8 });
+    keys(&mut editor, "*");
+    assert_eq!(editor.cursor(), Cursor { row: 0, column: 8 });
+    keys(&mut editor, "*");
+    assert_eq!(editor.cursor(), Cursor::default());
+}
+
 #[test]
 fn star_search_keeps_whole_word_counts_history_and_literal_search_distinct() {
     let fixture = Fixture::new();
     let text = "cat\nscatter\ncat_cat\ncat2\n2cat\nCat\ncat\ncat\n\n";
     let mut editor = fixture.editor(text);
-    keys(&mut editor, "l*");
+    keys(&mut editor, "l**");
     assert_eq!(editor.cursor(), Cursor { row: 6, column: 0 });
     assert_eq!(editor.search_match().unwrap().end_column, 3);
     keys(&mut editor, "nN2*");
@@ -169,6 +192,9 @@ fn star_search_uses_unicode_words_and_vim_same_line_fallbacks() {
     ] {
         let mut editor = fixture.editor(text);
         keys(&mut editor, positioning);
+        let origin = editor.cursor();
+        editor.handle(Input::Char('*'));
+        assert_eq!(editor.cursor(), origin, "{text:?}");
         editor.handle(Input::Char('*'));
         assert_eq!(editor.cursor(), Cursor { row, column: 0 }, "{text:?}");
         assert_eq!(
@@ -191,6 +217,11 @@ fn star_search_rebinding_moves_all_carets_and_remains_view_local() {
     );
     session.handle(Input::Ctrl('e'));
     session_keys(&mut session, "2q");
+    assert_eq!(
+        session.editor().carets(),
+        [Cursor::default(), Cursor { row: 1, column: 0 }]
+    );
+    session_keys(&mut session, "2q");
     assert_eq!(
         session.editor().carets(),
         [Cursor { row: 0, column: 16 }, Cursor { row: 1, column: 16 }]
@@ -439,6 +470,14 @@ fn readonly_before_and_historical_after_seeks_preserve_snapshots_and_folded_exce
             }
         );
         session_keys(&mut session, "*");
+        assert_eq!(
+            session.editor().cursor(),
+            Cursor {
+                row: 19,
+                column: second_x
+            }
+        );
+        session_keys(&mut session, "*");
         assert_eq!(
             session.editor().cursor(),
             Cursor {