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Emacs xterm specific initialization does not complete properly

See original GitHub issue

The emacs cannot define xterm configuration of the background color. I’ve debugged the issue down to the point when emacs queries the xterm background color.

Unfortunately, I cannot provide more exact reasons and errors due to a lack of emacs debugging experience.

Details

Browser and browser version: Electron 17
OS version: macOS 12.3
xterm.js version: 4.17.0 and 4.18. Possibly, 4.16.0 affected, too.
emacs: 26 or 27. Most probably, older versions are affected, too

Steps to reproduce

Run the emacs command
Observe the current window
*scratch* is opened. Expected that the *GNU Emacs* window is opened.

Issue Analytics

State:
Created 2 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

3reactions

jerchcommented, Mar 23, 2022

This is prolly caused by the returned sequence from here: https://github.com/xtermjs/xterm.js/blob/7ff27240f09f23f6df033aa9485dd04e2eba481d/src/browser/Terminal.ts#L227

which appends BEL as OSC finalizer, while the emacs function expects ST as finalizer in https://github.com/emacs-mirror/emacs/blob/d7f4cc0974645cc6a295740afe85c6e21d956119/lisp/term/xterm.el#L682.

Background: BEL as OSC finalizer was a defacto standard for several years introduced by xterm somewhere in the 90s. ST is the official and only allowed finalizer from ECMA-48. Now there is some confusion, whether to use BEL or ST. Newer xterm versions switched to ST I think, guess xterm.js should use ST as well (with a chance to break older apps though, that only scan for BEL).

1reaction

EvgeneOskincommented, Mar 23, 2022

Thanks, @meganrogge, and @jerch! I’ve checked your change. It solves the issue. 🎉

I cannot wait for the 4.19.0 release.🥇 😄

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