hterm 1.32: Disable local select in all mouse reporting modes.

* Previously we allowed "local" selection (that which happens by default in
  Chrome) to stay enabled for mouse mode 1001 (report mouseup/down only).  This
  caused a few issues.  I didn't realize at the time that emacs used this
  mouseup/down positions to set an active region, which conflicts with the
  local selection.  You tend wind up with a confusing partial overlap of the two
  selections.  Additionally, with copy-on-select enabled, the mouseup event
  was consumed by the terminal and never sent to the host.

  This change disables local selection when we're in mode 1001.  Local selection
  was disabled in mode 1002, report mousedown/up/movement, which is preferred
  by vi.

  Our "mouse-cell-motion-trick" was all about allowing local selection in mode
  1002, so that's been removed too.  I doubt this preference was widely used.

  The change adds the ability to use alt-click to override the current mouse
  state, so that you can make a local selection even while in mode 1001/1002.
  Alt was chosen as its the only modifier key which can't be sent with a
  mouse event, though if you're depending on alt === meta, you'll lose
  the ability to send meta-mouse sequences.  If your local window manager
  already maps alt-click to something, then you can add any other modifier in
  addition to alt (say, alt-ctrl-mousedown) to defeat your existing binding.

Change-Id: If03b2c1242be84f3ce62156f9cd23ef3c7b965e5
Reviewed-by: Marvelous Marius <>
Reviewed-by: Robert Ginda <>
Tested-by: Robert Ginda <>
6 files changed
tree: 13850b4311f56694b05dce51dc50c62951bf5e32
  1. .gitignore
  4. hterm/
  5. lib_wam/
  6. libdot/
  7. nassh/
  8. 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 Keep in mind that this mirror 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. It provides a base layer for web applications. The code is intended to work in any modern browser, in either a plain web page or a “privileged” environment such as a Chrome platform application or Firefox extension. In practice, it's only been put to use in Chrome platform applications so far.

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

  • nassh/ is a 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.

  • wash/ is a library for cross-origin virtual filsystems, 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.