feat: shell integration (OSC 133)
Terminals now pick up OSC 133 prompt/command/output/finished marks, which the VT parser ignores: a scanner (app/src/osc.rs, split-safe across reads, bodies capped at 4 KiB) finds them in the output stream and each mark records the cursor line. Lines are stable indexes that account for lines a full scrollback rotates out, so marks stay on their text; clearing the scrollback drops them. With marks present: Ctrl/Cmd+Shift+Up/Down and Previous/Next Prompt in the context menu jump between prompts, Copy Last Command Output copies what the last finished command printed, and a green/red bar beside each prompt shows the exit status (hover for code and duration). OSC 7 working-directory reports are parsed too (used by the next change). The manual shows bash and zsh snippets; fish 4 and common prompt themes already send the marks.
This commit is contained in:
Andy Dixon
@@ -73,6 +73,7 @@ Use Nexus Terminal when you need to:
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- Shift+PageUp/PageDown/Home/End and the mouse wheel scroll the scrollback; on the alternate screen the wheel sends arrow keys, so `tmux`, `screen` and `byobu` scroll naturally.
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- Context menu with Copy, Paste, Select All, Find, Send Snippet, Port Forwards, Split Right, Split Down, Export Output, Clear and Reset.
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- Export the whole scrollback as plain text.
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- Shell integration (OSC 133): jump between prompts, copy the last command's output, and see each command's exit status and duration beside its prompt.
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- Status-bar latency for the active SSH session.
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### SSH capabilities
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@@ -218,6 +218,32 @@ A new pane offers **Local Machine** and your terminal profiles (SSH, Telnet and
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## 6. Terminal actions and search
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### Shell integration
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When the shell marks its prompts and commands (the OSC 133 sequences), Nexus Terminal knows where each command starts and ends:
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- **Ctrl+Shift+Up / Ctrl+Shift+Down** (**Cmd+Shift** on macOS), or **Previous Prompt** / **Next Prompt** in the right-click menu, jump between prompts in the scrollback.
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- **Copy Last Command Output** in the right-click menu copies what the last finished command printed.
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- A thin bar beside each finished command's prompt shows how it ended: green for success, red for a non-zero exit. Hover it for the exit code and how long the command took.
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fish 4 and several prompt themes (Starship, Powerlevel10k with its shell integration option) send the marks already. For bash, add this to `~/.bashrc` on the machine the shell runs on:
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```bash
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PS0='\[\e]133;C\a\]'
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PROMPT_COMMAND='printf "\033]133;D;%s\007" "$?"; '"${PROMPT_COMMAND}"
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PS1='\[\e]133;A\a\]'"$PS1"'\[\e]133;B\a\]'
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```
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For zsh, add to `~/.zshrc`:
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```zsh
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precmd() { print -Pn "\e]133;D;$?\a\e]133;A\a" }
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preexec() { print -n "\e]133;C\a" }
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PS1="$PS1%{\e]133;B\a%}"
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```
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Shells that also report their working directory (OSC 7; fish, and zsh/bash with the usual `printf '\e]7;file://%s%s\a' "$HOSTNAME" "$PWD"` hook) let **SFTP Browser** open in that directory.
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### Keyboard and mouse
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- **Copy**: select text and press **Cmd+C** / **Ctrl+C**. With nothing selected, **Ctrl+C** sends an interrupt as usual.
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+2
-1
@@ -846,7 +846,8 @@ impl App {
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t.reset();
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}
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}
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MenuAction::Copy | MenuAction::SelectAll => {}
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// Handled inside the terminal view.
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MenuAction::Copy | MenuAction::SelectAll | MenuAction::PrevPrompt | MenuAction::NextPrompt | MenuAction::CopyOutput => {}
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}
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}
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@@ -8,6 +8,7 @@ mod desktop_view;
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mod forwards;
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mod github_view;
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mod irc_view;
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mod osc;
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mod profile_editor;
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mod quick_connect;
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mod raw_view;
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@@ -0,0 +1,147 @@
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//! Finds the OSC sequences the VT parser ignores but Nexus uses: OSC 133 (shell integration
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//! marks: prompt, command, output, finished with exit status) and OSC 7 (the shell's working
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//! directory). Sequences may be split across reads, so the scanner keeps state between chunks.
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#[derive(Debug, PartialEq)]
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pub enum Osc {
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/// 133;A — a prompt starts.
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Prompt,
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/// 133;C — the command's output starts.
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Output,
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/// 133;D[;status] — the command finished.
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Finished(Option<i32>),
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/// 7;file://host/path
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Cwd { host: String, path: String },
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}
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/// Longest OSC body collected; longer ones (not ours) are dropped.
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const MAX_OSC: usize = 4096;
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#[derive(Default)]
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enum State {
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#[default]
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Idle,
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Esc,
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Body(Vec<u8>),
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BodyEsc(Vec<u8>),
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}
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#[derive(Default)]
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pub struct OscScanner {
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state: State,
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}
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impl OscScanner {
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/// The sequences that complete in `bytes`, each with the offset just past its terminator.
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pub fn scan(&mut self, bytes: &[u8]) -> Vec<(usize, Osc)> {
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let mut out = Vec::new();
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let mut i = 0;
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while i < bytes.len() {
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let state = std::mem::take(&mut self.state);
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self.state = match state {
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State::Idle => match bytes[i..].iter().position(|&b| b == 0x1b) {
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Some(p) => {
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i += p;
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State::Esc
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}
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None => {
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i = bytes.len();
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State::Idle
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}
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},
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State::Esc if bytes[i] == b']' => State::Body(Vec::new()),
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State::Esc => State::Idle,
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State::Body(mut b) => match bytes[i] {
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0x07 => {
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if let Some(osc) = parse(&b) {
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out.push((i + 1, osc));
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}
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State::Idle
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}
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0x1b => State::BodyEsc(b),
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c if b.len() < MAX_OSC => {
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b.push(c);
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State::Body(b)
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}
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_ => State::Idle,
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},
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State::BodyEsc(b) if bytes[i] == b'\\' => {
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if let Some(osc) = parse(&b) {
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out.push((i + 1, osc));
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}
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State::Idle
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}
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// An ESC that doesn't end the OSC starts a new sequence.
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State::BodyEsc(_) => {
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// Re-examine this byte as the one after an ESC.
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self.state = State::Esc;
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continue;
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}
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};
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i += 1;
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}
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out
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}
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}
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fn parse(body: &[u8]) -> Option<Osc> {
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let s = std::str::from_utf8(body).ok()?;
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if let Some(rest) = s.strip_prefix("133;") {
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let mut parts = rest.split(';');
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return match parts.next()? {
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"A" => Some(Osc::Prompt),
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"C" => Some(Osc::Output),
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"D" => Some(Osc::Finished(parts.next().and_then(|c| c.parse().ok()))),
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_ => None,
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};
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}
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let url = s.strip_prefix("7;")?.strip_prefix("file://")?;
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let (host, path) = url.split_at(url.find('/')?);
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Some(Osc::Cwd { host: host.into(), path: percent_decode(path) })
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}
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fn percent_decode(s: &str) -> String {
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let b = s.as_bytes();
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let mut out = Vec::with_capacity(b.len());
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let mut i = 0;
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while i < b.len() {
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match (b[i], b.get(i + 1..i + 3).and_then(|h| u8::from_str_radix(std::str::from_utf8(h).ok()?, 16).ok())) {
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(b'%', Some(v)) => {
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out.push(v);
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i += 3;
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}
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(c, _) => {
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out.push(c);
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i += 1;
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}
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}
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}
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String::from_utf8_lossy(&out).into_owned()
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn finds_marks_and_cwd_even_when_split() {
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let stream = b"hi\x1b]133;A\x07$ ls\x1b]133;C\x1b\\file\x1b]133;D;2\x07\x1b]7;file://box/home/me/My%20Dir\x07\x1b]0;title\x07\x1b[31mred";
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let whole = OscScanner::default().scan(stream);
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let want = [Osc::Prompt, Osc::Output, Osc::Finished(Some(2)), Osc::Cwd { host: "box".into(), path: "/home/me/My Dir".into() }];
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assert_eq!(whole.iter().map(|(_, o)| o).collect::<Vec<_>>(), want.iter().collect::<Vec<_>>());
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assert_eq!(whole[0].0, 10, "offset is just past the terminator");
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// Byte by byte gives the same sequences at the same absolute offsets.
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let mut s = OscScanner::default();
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let mut split = vec![];
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for (i, b) in stream.iter().enumerate() {
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split.extend(s.scan(std::slice::from_ref(b)).into_iter().map(|(end, o)| (i + end, o)));
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}
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assert_eq!(split, whole);
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// Unterminated and oversized bodies don't leak into later output.
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let mut s = OscScanner::default();
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let mut long = b"\x1b]133;A".to_vec();
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long.extend(std::iter::repeat_n(b'x', MAX_OSC + 10));
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long.extend(b"\x07\x1b]133;D\x07");
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assert_eq!(s.scan(&long).into_iter().map(|(_, o)| o).collect::<Vec<_>>(), vec![Osc::Finished(None)]);
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}
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}
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+235
-1
@@ -40,6 +40,9 @@ pub enum MenuAction {
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Export,
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Clear,
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Reset,
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PrevPrompt,
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NextPrompt,
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CopyOutput,
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}
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#[derive(Default)]
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@@ -107,8 +110,30 @@ pub struct TermView {
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focus_requested: bool,
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/// Hold back multi-line pastes that would run unbracketed (set from preferences each frame).
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pub confirm_paste: bool,
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osc: crate::osc::OscScanner,
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/// Shell-integration prompts (OSC 133), oldest first.
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prompts: Vec<PromptMark>,
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/// Lines rotated out of a full scrollback since start, so marks keep pointing at their text.
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rotated: i64,
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max_history: usize,
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/// The working directory the shell last reported (OSC 7): (host, path).
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pub reported_cwd: Option<(String, String)>,
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}
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/// One command as shell integration reported it. Lines are stable indexes (see `stable`).
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#[derive(Clone, Debug)]
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struct PromptMark {
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prompt: i64,
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output: Option<i64>,
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end: Option<i64>,
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exit: Option<i32>,
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started: Option<std::time::Instant>,
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duration: Option<std::time::Duration>,
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}
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/// Marks kept per terminal; older ones are dropped.
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const MAX_PROMPTS: usize = 5000;
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const URL_RE: &str = r#"(?:https?|ftp)://[^\s<>"'`]+[^\s<>"'`.,;:!?)\]]"#;
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fn rgb(c: [u8; 4]) -> Color32 {
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@@ -135,14 +160,122 @@ impl TermView {
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find: None,
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focus_requested: true,
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confirm_paste: false,
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osc: Default::default(),
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prompts: Vec::new(),
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rotated: 0,
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max_history: scrollback.min(100_000),
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reported_cwd: None,
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}
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}
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pub fn feed(&mut self, bytes: &[u8]) {
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self.parser.advance(&mut self.term, bytes);
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let mut start = 0;
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for (end, osc) in self.osc.scan(bytes) {
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self.advance(&bytes[start..end]);
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start = end;
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self.apply_osc(osc);
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}
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self.advance(&bytes[start..]);
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self.generation += 1;
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}
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/// Feeds the VT parser, counting lines a full scrollback rotates out (one per line feed at the
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/// bottom of the screen) so shell-integration marks stay on their lines.
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fn advance(&mut self, bytes: &[u8]) {
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if self.prompts.is_empty() || self.term.mode().contains(TermMode::ALT_SCREEN) {
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self.parser.advance(&mut self.term, bytes);
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return;
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}
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let h0 = self.term.grid().history_size();
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if h0 < self.max_history {
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self.parser.advance(&mut self.term, bytes);
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} else {
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// ponytail: counts LF at the bottom row only; scroll-region and CSI S scrolling while
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// the history is full can leave marks a few lines off.
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let bottom = self.rows as i32 - 1;
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for piece in bytes.split_inclusive(|&b| b == b'\n') {
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let at_bottom = self.term.grid().cursor.point.line.0 == bottom;
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self.parser.advance(&mut self.term, piece);
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if at_bottom && piece.ends_with(b"\n") && self.term.grid().history_size() == self.max_history {
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self.rotated += 1;
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}
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}
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}
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if self.term.grid().history_size() < h0 {
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// The scrollback was cleared: earlier marks point at nothing.
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self.prompts.clear();
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}
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}
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/// Stable index of a grid line: unchanged as lines scroll into (and out of) the history.
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fn stable(&self, line: Line) -> i64 {
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self.term.grid().history_size() as i64 + line.0 as i64 + self.rotated
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}
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fn line_of(&self, stable: i64) -> Line {
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Line((stable - self.rotated - self.term.grid().history_size() as i64) as i32)
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}
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fn cursor_stable(&self) -> i64 {
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self.stable(self.term.grid().cursor.point.line)
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}
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fn apply_osc(&mut self, osc: crate::osc::Osc) {
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use crate::osc::Osc;
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match osc {
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Osc::Prompt => {
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let line = self.cursor_stable();
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if self.prompts.last().is_some_and(|p| p.prompt == line) {
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return;
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}
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if self.prompts.len() >= MAX_PROMPTS {
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self.prompts.remove(0);
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}
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self.prompts.push(PromptMark { prompt: line, output: None, end: None, exit: None, started: None, duration: None });
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}
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Osc::Output => {
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let line = self.cursor_stable();
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if let Some(p) = self.prompts.last_mut() {
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p.output = Some(line);
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p.started = Some(std::time::Instant::now());
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}
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}
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Osc::Finished(code) => {
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let line = self.cursor_stable();
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if let Some(p) = self.prompts.last_mut().filter(|p| p.output.is_some() && p.end.is_none()) {
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p.end = Some(line);
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p.exit = code;
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p.duration = p.started.map(|t| t.elapsed());
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}
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}
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Osc::Cwd { host, path } => self.reported_cwd = Some((host, path)),
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}
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}
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/// Scrolls so the previous (or next) prompt is at the top. False when there is none.
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pub fn jump_prompt(&mut self, forward: bool) -> bool {
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let top = Line(-(self.term.grid().display_offset() as i32));
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let lines: Vec<i32> = self.prompts.iter().map(|p| self.line_of(p.prompt).0).filter(|&l| l >= self.term.grid().topmost_line().0).collect();
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let target = if forward { lines.iter().copied().find(|&l| l > top.0) } else { lines.iter().rev().copied().find(|&l| l < top.0) };
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let Some(line) = target else { return false };
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let want_offset = (-line).clamp(0, self.term.grid().history_size() as i32);
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self.term.scroll_display(Scroll::Delta(want_offset - self.term.grid().display_offset() as i32));
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true
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}
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/// The output of the most recent command that finished (shell integration).
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pub fn last_output(&self) -> Option<String> {
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let p = self.prompts.iter().rev().find(|p| p.output.is_some() && p.end.is_some())?;
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let (from, to) = (self.line_of(p.output?).0.max(self.term.grid().topmost_line().0), self.line_of(p.end?).0);
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let text: Vec<String> = (from..to).map(|l| self.line_text(Line(l)).0.trim_end().to_string()).collect();
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Some(text.join("\n").trim_end_matches('\n').to_string())
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}
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/// Whether the shell reports prompts (OSC 133), which enables the commands above.
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pub fn has_shell_integration(&self) -> bool {
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!self.prompts.is_empty()
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}
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pub fn size(&self) -> (u16, u16) {
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(self.cols, self.rows)
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}
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@@ -306,6 +439,22 @@ impl TermView {
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}
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self.paint(ui, rect, origin, &font, cw, ch, theme, focused);
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// Exit status of each finished command, as a bar beside its prompt (shell integration).
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let hover = ui.input(|i| i.pointer.hover_pos());
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for (bar, exit, took) in self.status_bars(rect, origin, ch) {
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let color = match exit {
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Some(0) => Color32::from_rgb(0x4c, 0xaf, 0x50),
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Some(_) => Color32::from_rgb(0xe5, 0x39, 0x35),
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None => Color32::GRAY,
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};
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ui.painter_at(rect).rect_filled(bar, 1.0, color);
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if hover.is_some_and(|p| bar.expand2(vec2(3.0, 0.0)).contains(p)) {
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let exit = exit.map_or("finished".to_string(), |c| format!("exit {c}"));
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let took = took.map_or(String::new(), |d| format!(" · {:.1?}", d));
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egui::Tooltip::always_open(ui.ctx().clone(), ui.layer_id(), egui::Id::new(("cmd-status", bar.min.y as i32)), egui::PopupAnchor::Pointer)
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.show(|ui| ui.label(format!("{exit}{took}")));
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}
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}
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resp.context_menu(|ui| {
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let m = if cfg!(target_os = "macos") { "⌘" } else { "Ctrl+" };
|
||||
@@ -322,6 +471,19 @@ impl TermView {
|
||||
(MenuAction::Clear, "Clear", String::new()),
|
||||
(MenuAction::Reset, "Reset", String::new()),
|
||||
];
|
||||
if self.has_shell_integration() {
|
||||
for (a, label, keys) in [
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(MenuAction::PrevPrompt, "Previous Prompt", format!("{m}Shift+↑")),
|
||||
(MenuAction::NextPrompt, "Next Prompt", format!("{m}Shift+↓")),
|
||||
(MenuAction::CopyOutput, "Copy Last Command Output", String::new()),
|
||||
] {
|
||||
if ui.add(egui::Button::new(label).shortcut_text(keys).min_size(vec2(200.0, 0.0))).clicked() {
|
||||
out.menu = Some(a);
|
||||
ui.close();
|
||||
}
|
||||
}
|
||||
ui.separator();
|
||||
}
|
||||
for (i, (a, label, keys)) in items.into_iter().enumerate() {
|
||||
if matches!(i, 3 | 5 | 6 | 8) {
|
||||
ui.separator();
|
||||
@@ -342,9 +504,38 @@ impl TermView {
|
||||
self.select_all();
|
||||
out.menu = None;
|
||||
}
|
||||
match out.menu {
|
||||
Some(a @ (MenuAction::PrevPrompt | MenuAction::NextPrompt)) => {
|
||||
self.jump_prompt(a == MenuAction::NextPrompt);
|
||||
out.menu = None;
|
||||
}
|
||||
Some(MenuAction::CopyOutput) => {
|
||||
if let Some(text) = self.last_output() {
|
||||
ui.ctx().copy_text(text);
|
||||
}
|
||||
out.menu = None;
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
out
|
||||
}
|
||||
|
||||
/// Where to draw each visible finished command's status bar, with its exit code and duration.
|
||||
fn status_bars(&self, rect: Rect, origin: Pos2, ch: f32) -> Vec<(Rect, Option<i32>, Option<std::time::Duration>)> {
|
||||
let offset = self.term.grid().display_offset() as i32;
|
||||
self.prompts
|
||||
.iter()
|
||||
.filter(|p| p.end.is_some())
|
||||
.filter_map(|p| {
|
||||
let vr = self.line_of(p.prompt).0 + offset;
|
||||
(0..self.rows as i32).contains(&vr).then(|| {
|
||||
let y = origin.y + vr as f32 * ch;
|
||||
(Rect::from_min_max(pos2(rect.left(), y + 1.0), pos2(rect.left() + 3.0, y + ch - 1.0)), p.exit, p.duration)
|
||||
})
|
||||
})
|
||||
.collect()
|
||||
}
|
||||
|
||||
fn keyboard(&mut self, ui: &mut Ui, out: &mut TermResponse) {
|
||||
let events = ui.input(|i| i.events.clone());
|
||||
let mode = *self.term.mode();
|
||||
@@ -377,6 +568,11 @@ impl TermView {
|
||||
typed = true;
|
||||
}
|
||||
Event::Key { key, pressed: true, modifiers, .. } => {
|
||||
// Ctrl/Cmd+Shift+Up/Down jump between prompts (shell integration).
|
||||
if modifiers.command && modifiers.shift && matches!(key, Key::ArrowUp | Key::ArrowDown) && self.has_shell_integration() {
|
||||
self.jump_prompt(key == Key::ArrowDown);
|
||||
continue;
|
||||
}
|
||||
// Shift+PageUp/PageDown/Home/End scroll the local scrollback.
|
||||
if modifiers.shift && !modifiers.ctrl && !mode.contains(TermMode::ALT_SCREEN) {
|
||||
let page = self.rows as i32 - 1;
|
||||
@@ -902,6 +1098,44 @@ mod tests {
|
||||
assert!(out.confirm_paste.is_none() && out.input.starts_with(b"\x1b[200~"), "bracketed paste needs no prompt");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn shell_integration_marks_survive_a_full_scrollback() {
|
||||
// Scrollback of 30 lines, so the history fills and rotates during the test.
|
||||
let mut t = TermView::new(30, 14.0, CursorStyle::Block);
|
||||
let prompt = |t: &mut TermView| t.feed(b"\x1b]133;A\x07$ \x1b]133;B\x07");
|
||||
let run = |t: &mut TermView, cmd: &str, out: &[String], code: i32| {
|
||||
t.feed(format!("{cmd}\r\n\x1b]133;C\x07").as_bytes());
|
||||
for l in out {
|
||||
t.feed(format!("{l}\r\n").as_bytes());
|
||||
}
|
||||
t.feed(format!("\x1b]133;D;{code}\x07").as_bytes());
|
||||
};
|
||||
prompt(&mut t);
|
||||
run(&mut t, "seq 3", &["1".into(), "2".into(), "3".into()], 0);
|
||||
prompt(&mut t);
|
||||
assert_eq!(t.last_output().as_deref(), Some("1\n2\n3"));
|
||||
let many: Vec<String> = (0..80).map(|i| format!("line {i}")).collect();
|
||||
run(&mut t, "big", &many, 3);
|
||||
prompt(&mut t);
|
||||
run(&mut t, "tail", &["a".into(), "b".into()], 1);
|
||||
prompt(&mut t);
|
||||
assert_eq!(t.last_output().as_deref(), Some("a\nb"), "rotation must not shift the marks");
|
||||
let last = t.prompts.iter().rev().nth(1).unwrap();
|
||||
assert_eq!(last.exit, Some(1));
|
||||
assert_eq!(t.line_text(t.line_of(last.prompt)).0.trim_end(), "$ tail");
|
||||
// Jumping back lands an earlier prompt (still in the scrollback) at the top of the view.
|
||||
let more: Vec<String> = (0..20).map(|i| format!("more {i}")).collect();
|
||||
run(&mut t, "more", &more, 0);
|
||||
prompt(&mut t);
|
||||
assert!(t.jump_prompt(false));
|
||||
let top = Line(-(t.term.grid().display_offset() as i32));
|
||||
assert!(t.line_text(top).0.starts_with("$ "), "{:?}", t.line_text(top).0);
|
||||
// A cleared scrollback drops the marks with it.
|
||||
t.feed(b"\x1b[3J\x1b[2J");
|
||||
t.feed(b"x\r\n");
|
||||
assert!(t.prompts.len() <= 1);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn feeds_text_and_finds_it() {
|
||||
let mut t = TermView::new(1000, 14.0, CursorStyle::Block);
|
||||
|
||||
Reference in New Issue
Block a user