9df70a0772
## Summary - add vim-style pager navigation for transcript overlays (j/k, ctrl+f/b/d/u) without removing existing keys - add shift-space to page up ------ [Codex Task](https://chatgpt.com/codex/tasks/task_i_69309d26da508329908b2dc8ca40afb7)
112 lines
3.2 KiB
Rust
112 lines
3.2 KiB
Rust
use crossterm::event::KeyCode;
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use crossterm::event::KeyEvent;
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use crossterm::event::KeyEventKind;
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use crossterm::event::KeyModifiers;
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use ratatui::style::Style;
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use ratatui::style::Stylize;
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use ratatui::text::Span;
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#[cfg(test)]
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const ALT_PREFIX: &str = "⌥ + ";
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#[cfg(all(not(test), target_os = "macos"))]
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const ALT_PREFIX: &str = "⌥ + ";
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#[cfg(all(not(test), not(target_os = "macos")))]
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const ALT_PREFIX: &str = "alt + ";
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const CTRL_PREFIX: &str = "ctrl + ";
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const SHIFT_PREFIX: &str = "shift + ";
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#[derive(Clone, Copy, Debug, Eq, PartialEq)]
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pub(crate) struct KeyBinding {
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key: KeyCode,
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modifiers: KeyModifiers,
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}
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impl KeyBinding {
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pub(crate) const fn new(key: KeyCode, modifiers: KeyModifiers) -> Self {
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Self { key, modifiers }
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}
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pub fn is_press(&self, event: KeyEvent) -> bool {
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self.key == event.code
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&& self.modifiers == event.modifiers
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&& (event.kind == KeyEventKind::Press || event.kind == KeyEventKind::Repeat)
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}
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}
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pub(crate) const fn plain(key: KeyCode) -> KeyBinding {
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KeyBinding::new(key, KeyModifiers::NONE)
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}
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pub(crate) const fn alt(key: KeyCode) -> KeyBinding {
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KeyBinding::new(key, KeyModifiers::ALT)
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}
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pub(crate) const fn shift(key: KeyCode) -> KeyBinding {
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KeyBinding::new(key, KeyModifiers::SHIFT)
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}
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pub(crate) const fn ctrl(key: KeyCode) -> KeyBinding {
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KeyBinding::new(key, KeyModifiers::CONTROL)
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}
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pub(crate) const fn ctrl_alt(key: KeyCode) -> KeyBinding {
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KeyBinding::new(key, KeyModifiers::CONTROL.union(KeyModifiers::ALT))
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}
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fn modifiers_to_string(modifiers: KeyModifiers) -> String {
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let mut result = String::new();
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if modifiers.contains(KeyModifiers::CONTROL) {
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result.push_str(CTRL_PREFIX);
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}
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if modifiers.contains(KeyModifiers::SHIFT) {
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result.push_str(SHIFT_PREFIX);
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}
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if modifiers.contains(KeyModifiers::ALT) {
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result.push_str(ALT_PREFIX);
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}
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result
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}
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impl From<KeyBinding> for Span<'static> {
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fn from(binding: KeyBinding) -> Self {
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(&binding).into()
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}
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}
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impl From<&KeyBinding> for Span<'static> {
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fn from(binding: &KeyBinding) -> Self {
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let KeyBinding { key, modifiers } = binding;
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let modifiers = modifiers_to_string(*modifiers);
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let key = match key {
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KeyCode::Enter => "enter".to_string(),
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KeyCode::Char(' ') => "space".to_string(),
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KeyCode::Up => "↑".to_string(),
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KeyCode::Down => "↓".to_string(),
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KeyCode::Left => "←".to_string(),
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KeyCode::Right => "→".to_string(),
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KeyCode::PageUp => "pgup".to_string(),
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KeyCode::PageDown => "pgdn".to_string(),
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_ => format!("{key}").to_ascii_lowercase(),
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};
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Span::styled(format!("{modifiers}{key}"), key_hint_style())
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}
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}
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fn key_hint_style() -> Style {
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Style::default().dim()
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}
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pub(crate) fn has_ctrl_or_alt(mods: KeyModifiers) -> bool {
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(mods.contains(KeyModifiers::CONTROL) || mods.contains(KeyModifiers::ALT)) && !is_altgr(mods)
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}
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#[cfg(windows)]
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#[inline]
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pub(crate) fn is_altgr(mods: KeyModifiers) -> bool {
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mods.contains(KeyModifiers::ALT) && mods.contains(KeyModifiers::CONTROL)
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}
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#[cfg(not(windows))]
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#[inline]
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pub(crate) fn is_altgr(_mods: KeyModifiers) -> bool {
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false
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}
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