hterm: Announce messages shown by showOverlay

This adds accessibiliy announcements for messages shown by
Terminal.showOverlay, for example the announcement for copying text.

A test is added. Relatedly, these announcements should be voiced even
when full accessibility support isn't enabled as there is no performance
cost to doing so. This removes the check which prevented those
announcements being voiced.

Bug: 822490, 646690
Change-Id: I6999f2c811534f081c465d93b3ee7baf971633c4
Tested-by: Raymes Khoury <>
Reviewed-by: Mike Frysinger <>
6 files changed
tree: df5ffca2416d3db7b43b727d05763191a5943047
  1. .clang-format
  2. .eslintrc.js
  3. .gitignore
  7. hterm/
  8. libdot/
  9. nassh/
  11. package.json
  12. saltpig/
  13. ssh_client/
  14. wam/
  15. wash/


This repository contains the libdot JavaScript library and some web applications that make use of it.

The official copy of this repository is hosted at

There is also a mirror on github at A few subprojects are also extracted out into their own git repo and mirrored. Keep in mind that these mirrors may occasionally be behind the official repository.

All changes must go through the Gerrit code review server on Github pull requests cannot be accepted. Please see the document in this directory for the details.

Top level directories

  • libdot/ is a small set of JS libraries initially developed as part of hterm, now available as shared code.

  • hterm/ is a JS library that provides a terminal emulator. It is reasonably fast, reasonably correct, and reasonably portable across browsers.

  • nassh/ is the Secure Shell Chrome App (currently a “v1.5” app, soon to become a “v2” or platform app) that combines hterm with a NaCl build of OpenSSH to provide a PuTTY-like app for Chrome users.

  • ssh_client/ is the NaCl port of OpenSSH. It is used by nassh to create the Secure Shell App.

  • wash/ is a library for cross-origin virtual filesystems, similar to the Plan 9 filesystem. This directory also contains a simple bash-like shell environment for exploring these filesystems. The code in this directory is a work-in-progress.