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|
//! Outer terminal window title.
//!
//! Herdr is a terminal emulator, so `OSC 0`/`OSC 2` written by a pane stops at
//! Herdr and never reaches the terminal Herdr itself runs in. Without this the
//! host window title keeps whatever the shell or `ssh` left behind, which is
//! what window managers show in tab and group bars.
//!
//! The title is rendered on the server so `{hostname}` names the host the panes
//! actually live on, not the machine a thin remote client runs on. The server
//! pushes the result to the foreground client, which writes the `OSC 0`.
use super::App;
use crate::config::{WindowTitlePart, WindowTitleTemplate, WindowTitleToken};
impl App {
pub(crate) fn configure_window_title(&mut self, template: &str) {
self.window_title_template =
WindowTitleTemplate::parse(template)
.ok()
.flatten()
.map(|template| {
// Resolve the hostname once here rather than per render.
let hostname = if template.uses(WindowTitleToken::Hostname) {
crate::platform::hostname().unwrap_or_default()
} else {
String::new()
};
(template, hostname)
});
}
/// Whether `ui.window_title` asks Herdr to own the outer terminal title at
/// all. When it does not, Herdr leaves whatever the shell or `ssh` set.
pub(crate) fn window_title_configured(&self) -> bool {
self.window_title_template.is_some()
}
/// Whether the title depends on the focused pane's own terminal title, which
/// is the one input that arrives through PTY parsing rather than app state.
pub(crate) fn window_title_uses_terminal_title(&self) -> bool {
self.window_title_template
.as_ref()
.is_some_and(|(template, _)| template.uses(WindowTitleToken::TerminalTitle))
}
/// Renders the configured outer window title, or `None` when window titles
/// are disabled or every token resolved empty.
pub(crate) fn window_title(&self) -> Option<String> {
let (template, hostname) = self.window_title_template.as_ref()?;
let workspace = self
.state
.active
.and_then(|ws_idx| self.state.workspaces.get(ws_idx));
let mut title = String::new();
for part in template.parts() {
match part {
WindowTitlePart::Literal(literal) => title.push_str(literal),
WindowTitlePart::Token(WindowTitleToken::Hostname) => title.push_str(hostname),
WindowTitlePart::Token(WindowTitleToken::Workspace) => {
if let Some(workspace) = workspace {
title.push_str(
&workspace.display_name_from_terminals(&self.state.terminals),
);
}
}
WindowTitlePart::Token(WindowTitleToken::Tab) => {
if let Some(name) = workspace.and_then(|ws| ws.active_tab_display_name()) {
title.push_str(&name);
}
}
WindowTitlePart::Token(WindowTitleToken::Pane) => {
if let Some(label) = self
.focused_terminal_state()
.and_then(|terminal| terminal.manual_label.as_deref())
{
title.push_str(label);
}
}
WindowTitlePart::Token(WindowTitleToken::TerminalTitle) => {
if let Some(terminal_title) = self
.focused_terminal_state()
.and_then(|terminal| terminal.terminal_title_stripped())
{
title.push_str(&terminal_title);
}
}
}
}
Some(title)
}
fn focused_terminal_state(&self) -> Option<&crate::terminal::TerminalState> {
let workspace = self.state.workspaces.get(self.state.active?)?;
let terminal_id = workspace.terminal_id(workspace.focused_pane_id()?)?;
self.state.terminals.get(terminal_id)
}
}
#[cfg(test)]
mod tests {
use crate::app::App;
use crate::config::Config;
use crate::workspace::Workspace;
fn test_app() -> App {
let event_hub = crate::api::EventHub::default();
let (_api_tx, api_rx) = tokio::sync::mpsc::unbounded_channel();
let mut app = App::new(
&Config::default(),
crate::app::AppPolicy::TEST,
None,
api_rx,
event_hub,
);
app.state.workspaces = vec![Workspace::test_new("herd")];
app.state.active = Some(0);
app.state.ensure_test_terminals();
app
}
#[test]
fn renders_workspace_and_tab_names() {
let mut app = test_app();
app.configure_window_title("{workspace}/{tab}");
assert_eq!(app.window_title().as_deref(), Some("herd/1"));
app.state.workspaces[0].tabs[0].custom_name = Some("build".into());
assert_eq!(app.window_title().as_deref(), Some("herd/build"));
}
#[test]
fn renders_focused_pane_label_and_terminal_title() {
let mut app = test_app();
app.configure_window_title("{pane}|{terminal_title}");
let pane_id = app.state.workspaces[0].tabs[0].root_pane;
let terminal_id = app.state.workspaces[0].tabs[0].panes[&pane_id]
.attached_terminal_id
.clone();
let terminal = app
.state
.terminals
.get_mut(&terminal_id)
.expect("focused terminal");
terminal.manual_label = Some("api".into());
terminal.set_terminal_title(Some("⠋ building".into()));
assert_eq!(app.window_title().as_deref(), Some("api|building"));
}
#[test]
fn empty_template_disables_window_titles() {
let mut app = test_app();
app.configure_window_title("");
assert_eq!(app.window_title(), None);
}
#[test]
fn invalid_template_disables_window_titles() {
let mut app = test_app();
app.configure_window_title("{nope}");
assert_eq!(app.window_title(), None);
}
#[test]
fn unset_tokens_render_empty() {
let mut app = test_app();
app.configure_window_title("[{pane}]");
assert_eq!(app.window_title().as_deref(), Some("[]"));
}
}
|
