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session: improve title subscriptions

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This commit is contained in:
Guillermo Rauch 2016-07-14 16:16:44 -07:00
parent 81bfbd6006
commit 2f2268906a
1 changed files with 11 additions and 5 deletions
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16
session.js
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@ -40,19 +40,24 @@ module.exports = class Session extends EventEmitter {
}
});
this.shell = defaultShell;
this.getTitle();
}
focus () {
this.getTitle(true);
this.subscribed = true;
this.getTitle();
}
blur () {
this.subscribed = false;
clearTimeout(this.titlePoll);
}
getTitle (subscribe = false) {
getTitle () {
if ('win32' === process.platform) return;
if (this.fetching) return;
this.fetching = true;
let tty = this.pty.stdout.ttyname;
tty = tty.replace(/^\/dev\/tty/, '');
@ -64,6 +69,7 @@ module.exports = class Session extends EventEmitter {
// TODO: limit the concurrency of how many processes we run?
// TODO: only tested on mac
exec(`ps uxac | grep ${tty} | head -n 1`, (err, out) => {
this.fetching = false;
if (this.ended) return;
if (err) return;
let title = out.split(' ').pop();
@ -76,8 +82,8 @@ module.exports = class Session extends EventEmitter {
}
}
if (subscribe) {
this.titlePoll = setTimeout(() => this.getTitle(true), TITLE_POLL_INTERVAL);
if (this.subscribed) {
this.titlePoll = setTimeout(() => this.getTitle(), TITLE_POLL_INTERVAL);
}
});
}
@ -106,7 +112,7 @@ module.exports = class Session extends EventEmitter {
}
this.emit('exit');
this.ended = true;
clearTimeout(this.titlePoll);
this.blur();
}
};