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make up/down keep cursor screen position

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This commit is contained in:
alice pellerin
2026-03-17 03:12:37 -05:00
parent 72dfcdb6c9
commit a8e0a4fdb0
1 changed files with 12 additions and 3 deletions
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src/app/mod.rs
+12 -3
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@@ -91,24 +91,33 @@ impl App {
self.cursor.clamp(self.scroll_position, self.screen_size());
}
// TODO: for up/down, keep cursor at same relative position on screen
(Mode::Normal, Event::Key(key_event), None)
if key_event.modifiers.contains(KeyModifiers::CONTROL) &&
key_event.code == KeyCode::Char('d') => {
let head_offset = self.cursor.head - self.scroll_position;
let tail_offset = self.cursor.tail - self.scroll_position;
self.scroll_position = min(
self.scroll_position + self.screen_size() / 2,
self.contents.len() - (5 * BYTES_PER_LINE)
);
self.cursor.clamp(self.scroll_position, self.screen_size());
self.cursor.head = (self.scroll_position + head_offset).min(self.contents.len() - 1);
self.cursor.tail = (self.scroll_position + tail_offset).min(self.contents.len() - 1);
}
(Mode::Normal, Event::Key(key_event), None)
if key_event.modifiers.contains(KeyModifiers::CONTROL) &&
key_event.code == KeyCode::Char('u') => {
let head_offset = self.cursor.head - self.scroll_position;
let tail_offset = self.cursor.tail - self.scroll_position;
self.scroll_position = self.scroll_position.saturating_sub(
self.screen_size() / 2
);
self.cursor.clamp(self.scroll_position, self.screen_size());
self.cursor.head = (self.scroll_position + head_offset).min(self.contents.len() - 1);
self.cursor.tail = (self.scroll_position + tail_offset).min(self.contents.len() - 1);
}
(Mode::Normal, Event::Key(key_event), None)