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vterm.el
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vterm.el
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;;; vterm.el --- Fully-featured terminal emulator -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2020 by Lukas Fürmetz & Contributors
;;
;; Author: Lukas Fürmetz <[email protected]>
;; Version: 0.0.2
;; URL: https://github.com/akermu/emacs-libvterm
;; Keywords: terminals
;; Package-Requires: ((emacs "25.1"))
;; This file is not part of GNU Emacs.
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Emacs-libvterm (vterm) is fully-fledged terminal emulator based on an
;; external library (libvterm) loaded as a dynamic module. As a result of using
;; compiled code (instead of elisp), emacs-libvterm is fully capable, fast, and
;; it can seamlessly handle large outputs.
;;; Installation
;; Emacs-libvterm requires support for loading modules. You can check if your
;; Emacs supports modules by inspecting the variable module-file-suffix. If it
;; nil, than, you need to recompile Emacs or obtain a copy of Emacs with this
;; option enabled.
;; Emacs-libvterm requires CMake and libvterm. If libvterm is not available,
;; emacs-libvterm will downloaded and compiled. In this case, libtool is
;; needed.
;; The reccomended way to install emacs-libvterm is from MELPA.
;;; Usage
;; To open a terminal, simply use the command M-x vterm.
;;; Tips and tricks
;; Adding some shell-side configuration enables a large set of additional
;; features, including, directory tracking, prompt recognition, message passing.
;;; Code:
(require 'term/xterm)
(unless module-file-suffix
(error "VTerm needs module support. Please compile Emacs with
the --with-modules option!"))
(defvar vterm-copy-mode)
;;; Compilation of the module
(defcustom vterm-module-cmake-args ""
"Arguments given to CMake to compile vterm-module.
Currently, vterm defines the following flags (in addition to the
ones already available in CMake):
`USE_SYSTEM_LIBVTERM'. Set it to `Off' to use the vendored version of
libvterm instead of the one installed on your system.
This string is given verbatim to CMake, so it has to have the
correct syntax. An example of meaningful value for this variable
is `-DUSE_SYSTEM_LIBVTERM=Off'."
:type 'string
:group 'vterm)
(defcustom vterm-always-compile-module nil
"If not nil, if `vterm-module' is not found, compile it without asking.
When `vterm-always-compile-module' is nil, vterm will ask for
confirmation before compiling."
:type 'boolean
:group 'vterm)
(defvar vterm-install-buffer-name " *Install vterm* "
"Name of the buffer used for compiling vterm-module.")
(defun vterm-module--cmake-is-available ()
"Return t if cmake is available.
CMake is needed to build vterm, here we check that we can find
the executable."
(unless (executable-find "cmake")
(error "Vterm needs CMake to be compiled. Please, install CMake"))
t)
;;;###autoload
(defun vterm-module-compile ()
"Compile vterm-module."
(interactive)
(when (vterm-module--cmake-is-available)
(let* ((vterm-directory
(shell-quote-argument
;; NOTE: This is a workaround to fix an issue with how the Emacs
;; feature/native-comp branch changes the result of
;; `(locate-library "vterm")'. See emacs-devel thread
;; https://lists.gnu.org/archive/html/emacs-devel/2020-07/msg00306.html
;; for a discussion.
(file-name-directory (locate-library "vterm.el" t))))
(make-commands
(concat
"cd " vterm-directory "; \
mkdir -p build; \
cd build; \
cmake -G 'Unix Makefiles' "
vterm-module-cmake-args
" ..; \
make; \
cd -"))
(buffer (get-buffer-create vterm-install-buffer-name)))
(pop-to-buffer buffer)
(compilation-mode)
(if (zerop (let ((inhibit-read-only t))
(call-process "sh" nil buffer t "-c" make-commands)))
(message "Compilation of `emacs-libvterm' module succeeded")
(error "Compilation of `emacs-libvterm' module failed!")))))
;; If the vterm-module is not compiled yet, compile it
(unless (require 'vterm-module nil t)
(if (or vterm-always-compile-module
(y-or-n-p "Vterm needs `vterm-module' to work. Compile it now? "))
(progn
(vterm-module-compile)
(require 'vterm-module))
(error "Vterm will not work until `vterm-module' is compiled!")))
;;; Dependencies
;; Generate this list with:
;; awk -F\" '/bind_function*/ {print "(declare-function", $2, "\"vterm-module\")"}' vterm-module.c
(declare-function vterm--new "vterm-module")
(declare-function vterm--update "vterm-module")
(declare-function vterm--redraw "vterm-module")
(declare-function vterm--write-input "vterm-module")
(declare-function vterm--set-size "vterm-module")
(declare-function vterm--set-pty-name "vterm-module")
(declare-function vterm--get-pwd-raw "vterm-module")
(declare-function vterm--reset-point "vterm-module")
(declare-function vterm--get-icrnl "vterm-module")
(require 'subr-x)
(require 'find-func)
(require 'cl-lib)
(require 'term)
(require 'color)
(require 'compile)
(require 'face-remap)
(require 'tramp)
(require 'bookmark)
;;; Options
(defcustom vterm-shell shell-file-name
"The shell that gets run in the vterm."
:type 'string
:group 'vterm)
(defcustom vterm-tramp-shells
'(("ssh" login-shell) ("scp" login-shell) ("docker" "/bin/sh"))
"The shell that gets run in the vterm for tramp.
`vterm-tramp-shells' has to be a list of pairs of the format:
\(TRAMP-METHOD SHELL)
Use t as TRAMP-METHOD to specify a default shell for all methods.
Specific methods always take precedence over t.
Set SHELL to \\='login-shell to use the user's login shell on the host.
The login-shell detection currently works for POSIX-compliant remote
hosts that have the getent command (regular GNU/Linux distros, *BSDs,
but not MacOS X unfortunately).
You can specify an additional second SHELL command as a fallback
that is used when the login-shell detection fails, e.g.,
\\='((\"ssh\" login-shell \"/bin/bash\") ...)
If no second SHELL command is specified with \\='login-shell, vterm will
fall back to tramp's shell."
:type '(alist :key-type string :value-type string)
:group 'vterm)
(defcustom vterm-buffer-name "*vterm*"
"The basename used for vterm buffers.
This is the default name used when running `vterm' or
`vterm-other-window'.
With a numeric prefix argument to `vterm', the buffer name will
be the value of this variable followed by the number. For
example, with the numeric prefix argument 2, the buffer would be
named \"*vterm*<2>\"."
:type 'string
:group 'vterm)
(defcustom vterm-max-scrollback 1000
"Maximum \\='scrollback\\=' value.
The maximum allowed is 100000. This value can modified by
changing the SB_MAX variable in vterm-module.h and recompiling
the module."
:type 'number
:group 'vterm)
(defcustom vterm-min-window-width 80
"Minimum window width."
:type 'number
:group 'vterm)
(defcustom vterm-kill-buffer-on-exit t
"If not nil vterm buffers are killed when the attached process is terminated.
If `vterm-kill-buffer-on-exit' is set to t, when the process
associated to a vterm buffer quits, the buffer is killed. When
nil, the buffer will still be available as if it were in
`fundamental-mode'."
:type 'boolean
:group 'vterm)
(define-obsolete-variable-alias 'vterm-clear-scrollback
'vterm-clear-scrollback-when-clearing "0.0.1")
(define-obsolete-variable-alias 'vterm-use-vterm-prompt
'vterm-use-vterm-prompt-detection-method "0.0.1")
(defcustom vterm-clear-scrollback-when-clearing nil
"If not nil `vterm-clear' clears both screen and scrollback.
The scrollback is everything that is not current visible on
screen in vterm buffers.
If `vterm-clear-scrollback-when-clearing' is nil, `vterm-clear'
clears only the screen, so the scrollback is accessible moving
the point up."
:type 'boolean
:group 'vterm)
(defcustom vterm-keymap-exceptions
'("C-c" "C-x" "C-u" "C-g" "C-h" "C-l" "M-x" "M-o" "C-y" "M-y")
"Exceptions for `vterm-keymap'.
If you use a keybinding with a prefix-key, add that prefix-key to
this list. Note that after doing so that prefix-key cannot be sent
to the terminal anymore.
The mapping is done by the macro `vterm-define-key', and the
function `vterm--exclude-keys' removes the keybindings defined in
`vterm-keymap-exceptions'."
:type '(repeat string)
:set (lambda (sym val)
(set sym val)
(when (and (fboundp 'vterm--exclude-keys)
(boundp 'vterm-mode-map))
(vterm--exclude-keys vterm-mode-map val)))
:group 'vterm)
(defcustom vterm-exit-functions nil
"List of functions called when a vterm process exits.
Each function is called with two arguments: the vterm buffer of
the process if any, and a string describing the event passed from
the sentinel.
This hook applies only to new vterms, created after setting this
value with `add-hook'.
Note that this hook will not work if another package like
`shell-pop' sets its own sentinel to the `vterm' process."
:type 'hook
:group 'vterm)
(make-obsolete-variable 'vterm-set-title-functions
"This variable was substituted by `vterm-buffer-name-string'."
"0.0.1")
(defcustom vterm-buffer-name-string nil
"Format string for the title of vterm buffers.
If `vterm-buffer-name-string' is nil, vterm will not set the
title of its buffers. If not nil, `vterm-buffer-name-string' has
to be a format control string (see `format') containing one
instance of %s which will be substituted with the string TITLE.
The argument TITLE is provided by the shell. This requires shell
side configuration.
For example, if `vterm-buffer-name-string' is set to \"vterm %s\",
and the shell properly configured to set TITLE=$(pwd), than vterm
buffers will be named \"vterm\" followed by the current path.
See URL http://tldp.org/HOWTO/Xterm-Title-4.html for additional
information on the how to configure the shell."
:type 'string
:group 'vterm)
(defcustom vterm-term-environment-variable "xterm-256color"
"TERM value for terminal."
:type 'string
:group 'vterm)
(defcustom vterm-environment nil
"List of extra environment variables to the vterm shell processes only.
demo: \\='(\"env1=v1\" \"env2=v2\")"
:type '(repeat string)
:group 'vterm)
(defcustom vterm-enable-manipulate-selection-data-by-osc52 nil
"Support OSC 52 MANIPULATE SELECTION DATA(libvterm 0.2 is needed).
Support copy text to Emacs kill ring and system clipboard by using OSC 52.
For example: send base64 encoded \\='foo\\=' to kill ring: echo -en \\='\\e]52;c;Zm9v\\a\\=',
tmux can share its copy buffer to terminals by supporting osc52(like iterm2
xterm) you can enable this feature for tmux by :
set -g set-clipboard on #osc 52 copy paste share with iterm
set -ga terminal-overrides \\=',xterm*:XT:Ms=\\E]52;%p1%s;%p2%s\\007\\='
set -ga terminal-overrides \\=',screen*:XT:Ms=\\E]52;%p1%s;%p2%s\\007\\='
The clipboard querying/clearing functionality offered by OSC 52 is not
implemented here,And for security reason, this feature is disabled
by default."
:type 'boolean
:group 'vterm)
;; TODO: Improve doc string, it should not point to the readme but it should
;; be self-contained.
(defcustom vterm-eval-cmds '(("find-file" find-file)
("message" message)
("vterm-clear-scrollback" vterm-clear-scrollback))
"Whitelisted Emacs functions that can be executed from vterm.
You can execute Emacs functions directly from vterm buffers. To do this,
you have to escape the name of the function and its arguments with \e]51;E.
See Message passing in README.
The function you want to execute has to be in `vterm-eval-cmds'.
`vterm-eval-cmds' has to be a list of pairs of the format:
\(NAME-OF-COMMAND-IN-SHELL EMACS-FUNCTION)
The need for an explicit map is to avoid arbitrary code execution."
:type '(alist :key-type string)
:group 'vterm)
(defcustom vterm-disable-underline nil
"When not-nil, underline text properties are ignored.
This means that vterm will render underlined text as if it was not
underlined."
:type 'boolean
:group 'vterm)
(defcustom vterm-disable-inverse-video nil
"When not-nil, inverse video text properties are ignored.
This means that vterm will render reversed video text as if it was not
such."
:type 'boolean
:group 'vterm)
(define-obsolete-variable-alias 'vterm-disable-bold-font
'vterm-disable-bold "0.0.1")
(defcustom vterm-disable-bold-font nil
"When not-nil, bold text properties are ignored.
This means that vterm will render bold with the default face weight."
:type 'boolean
:group 'vterm)
(defcustom vterm-set-bold-hightbright nil
"When not-nil, using hightbright colors for bolded text, see #549."
:type 'boolean
:group 'vterm)
(defcustom vterm-ignore-blink-cursor t
"When t, vterm will ignore request from application to turn on/off cursor blink.
If nil, cursor in any window may begin to blink or not blink because
`blink-cursor-mode`is a global minor mode in Emacs,
you can use `M-x blink-cursor-mode` to toggle."
:type 'boolean
:group 'vterm)
(defcustom vterm-copy-exclude-prompt t
"When not-nil, the prompt is not included by `vterm-copy-mode-done'."
:type 'boolean
:group 'vterm)
(defcustom vterm-use-vterm-prompt-detection-method t
"When not-nil, the prompt is detected through the shell.
Vterm needs to know where the shell prompt is to enable all the
available features. There are two supported ways to do this.
First, the shell can inform vterm on the location of the prompt.
This requires shell-side configuration: the escape code 51;A is
used to set the current directory and prompt location. This
detection method is the most-reliable. To use it, you have
to change your shell prompt to print 51;A.
The second method is using a regular expression. This method does
not require any shell-side configuration. See
`term-prompt-regexp', for more information."
:type 'boolean
:group 'vterm)
(defcustom vterm-bookmark-check-dir t
"When set to non-nil, also restore directory when restoring a vterm bookmark."
:type 'boolean
:group 'vterm)
(defcustom vterm-copy-mode-remove-fake-newlines nil
"When not-nil fake newlines are removed on entering copy mode.
vterm inserts \\='fake\\=' newlines purely for rendering. When using
vterm-copy-mode these are in conflict with many emacs functions
like isearch-forward. if this varialbe is not-nil the
fake-newlines are removed on entering copy-mode and re-inserted
on leaving copy mode. Also truncate-lines is set to t on entering
copy-mode and set to nil on leaving."
:type 'boolean
:group 'vterm)
;;; Faces
(defface vterm-color-black
`((t :inherit term-color-black))
"Face used to render black color code."
:group 'vterm)
(defface vterm-color-red
`((t :inherit term-color-red))
"Face used to render red color code."
:group 'vterm)
(defface vterm-color-green
`((t :inherit term-color-green))
"Face used to render green color code."
:group 'vterm)
(defface vterm-color-yellow
`((t :inherit term-color-yellow))
"Face used to render yellow color code."
:group 'vterm)
(defface vterm-color-blue
`((t :inherit term-color-blue))
"Face used to render blue color code."
:group 'vterm)
(defface vterm-color-magenta
`((t :inherit term-color-magenta))
"Face used to render magenta color code."
:group 'vterm)
(defface vterm-color-cyan
`((t :inherit term-color-cyan))
"Face used to render cyan color code."
:group 'vterm)
(defface vterm-color-white
`((t :inherit term-color-white))
"Face used to render white color code."
:group 'vterm)
(defface vterm-color-bright-black
`((t :inherit ,(if (facep 'term-color-bright-black)
'term-color-bright-black
'term-color-black)))
"Face used to render bright black color code."
:group 'vterm)
(defface vterm-color-bright-red
`((t :inherit ,(if (facep 'term-color-bright-red)
'term-color-bright-red
'term-color-red)))
"Face used to render bright red color code."
:group 'vterm)
(defface vterm-color-bright-green
`((t :inherit ,(if (facep 'term-color-bright-green)
'term-color-bright-green
'term-color-green)))
"Face used to render bright green color code."
:group 'vterm)
(defface vterm-color-bright-yellow
`((t :inherit ,(if (facep 'term-color-bright-yellow)
'term-color-bright-yellow
'term-color-yellow)))
"Face used to render bright yellow color code."
:group 'vterm)
(defface vterm-color-bright-blue
`((t :inherit ,(if (facep 'term-color-bright-blue)
'term-color-bright-blue
'term-color-blue)))
"Face used to render bright blue color code."
:group 'vterm)
(defface vterm-color-bright-magenta
`((t :inherit ,(if (facep 'term-color-bright-magenta)
'term-color-bright-magenta
'term-color-magenta)))
"Face used to render bright magenta color code."
:group 'vterm)
(defface vterm-color-bright-cyan
`((t :inherit ,(if (facep 'term-color-bright-cyan)
'term-color-bright-cyan
'term-color-cyan)))
"Face used to render bright cyan color code."
:group 'vterm)
(defface vterm-color-bright-white
`((t :inherit ,(if (facep 'term-color-bright-white)
'term-color-bright-white
'term-color-white)))
"Face used to render bright white color code."
:group 'vterm)
(defface vterm-color-underline
`((t :inherit default))
"Face used to render cells with underline attribute.
Only foreground is used."
:group 'vterm)
(defface vterm-color-inverse-video
`((t :inherit default))
"Face used to render cells with inverse video attribute.
Only background is used."
:group 'vterm)
;;; Variables
(defvar vterm-color-palette
[vterm-color-black
vterm-color-red
vterm-color-green
vterm-color-yellow
vterm-color-blue
vterm-color-magenta
vterm-color-cyan
vterm-color-white
vterm-color-bright-black
vterm-color-bright-red
vterm-color-bright-green
vterm-color-bright-yellow
vterm-color-bright-blue
vterm-color-bright-magenta
vterm-color-bright-cyan
vterm-color-bright-white]
"Color palette for the foreground and background.")
(defvar-local vterm--term nil
"Pointer to Term.")
(defvar-local vterm--process nil
"Shell process of current term.")
(defvar-local vterm--redraw-timer nil)
(defvar-local vterm--redraw-immididately nil)
(defvar-local vterm--linenum-remapping nil)
(defvar-local vterm--prompt-tracking-enabled-p nil)
(defvar-local vterm--insert-function (symbol-function #'insert))
(defvar-local vterm--delete-char-function (symbol-function #'delete-char))
(defvar-local vterm--delete-region-function (symbol-function #'delete-region))
(defvar-local vterm--undecoded-bytes nil)
(defvar-local vterm--copy-mode-fake-newlines nil)
(defvar vterm-timer-delay 0.1
"Delay for refreshing the buffer after receiving updates from libvterm.
A larger delary improves performance when receiving large bursts
of data. If nil, never delay. The units are seconds.")
;;; Keybindings
;; We have many functions defined by vterm-define-key. Later, we will bind some
;; of the functions. If the following is not evaluated during compilation, the compiler
;; will complain that some functions are not defined (eg, vterm-send-C-c)
(eval-and-compile
(defmacro vterm-define-key (key)
"Define a command that sends KEY with modifiers C and M to vterm."
(declare (indent defun)
(doc-string 3))
`(progn (defun ,(intern (format "vterm-send-%s" key))()
,(format "Sends %s to the libvterm." key)
(interactive)
(vterm-send-key ,(char-to-string (get-byte (1- (length key)) key))
,(let ((case-fold-search nil))
(or (string-match-p "[A-Z]$" key)
(string-match-p "S-" key)))
,(string-match-p "M-" key)
,(string-match-p "C-" key)))
(make-obsolete ',(intern (format "vterm-send-%s" key))
"use `vterm--self-insert' or `vterm-send' or `vterm-send-key'."
"v0.1")))
(make-obsolete 'vterm-define-key "" "v0.1")
(mapc (lambda (key)
(eval `(vterm-define-key ,key)))
(cl-loop for prefix in '("M-")
append (cl-loop for char from ?A to ?Z
for key = (format "%s%c" prefix char)
collect key)))
(mapc (lambda (key)
(eval `(vterm-define-key ,key)))
(cl-loop for prefix in '("C-" "M-" "C-S-")
append (cl-loop for char from ?a to ?z
for key = (format "%s%c" prefix char)
collect key))))
;; Function keys and most of C- and M- bindings
(defun vterm--exclude-keys (map exceptions)
"Remove EXCEPTIONS from the keys bound by `vterm-define-keys'.
Exceptions are defined by `vterm-keymap-exceptions'."
(mapc (lambda (key)
(define-key map (kbd key) nil))
exceptions)
(mapc (lambda (key)
(define-key map (kbd key) #'vterm--self-insert))
(cl-loop for number from 1 to 12
for key = (format "<f%i>" number)
unless (member key exceptions)
collect key))
(let ((esc-map (lookup-key map "\e"))
(i 0)
key)
(unless esc-map (setq esc-map (make-keymap)))
(while (< i 128)
(setq key (make-string 1 i))
(unless (member (key-description key) exceptions)
(define-key map key 'vterm--self-insert))
;; Avoid O and [. They are used in escape sequences for various keys.
(unless (or (eq i ?O) (eq i 91))
(unless (member (key-description key "\e") exceptions)
(define-key esc-map key 'vterm--self-insert-meta)))
(setq i (1+ i)))
(define-key map "\e" esc-map)))
(defun vterm-xterm-paste (event)
"Handle xterm paste EVENT in vterm."
(interactive "e")
(with-temp-buffer
(xterm-paste event)
(kill-new (buffer-string)))
(vterm-yank))
(defvar vterm-mode-map
(let ((map (make-sparse-keymap)))
(vterm--exclude-keys map vterm-keymap-exceptions)
(define-key map (kbd "C-]") #'vterm--self-insert)
(define-key map (kbd "M-<") #'vterm--self-insert)
(define-key map (kbd "M->") #'vterm--self-insert)
(define-key map [tab] #'vterm-send-tab)
(define-key map (kbd "TAB") #'vterm-send-tab)
(define-key map [backtab] #'vterm--self-insert)
(define-key map [backspace] #'vterm-send-backspace)
(define-key map (kbd "DEL") #'vterm-send-backspace)
(define-key map [delete] #'vterm-send-delete)
(define-key map [M-backspace] #'vterm-send-meta-backspace)
(define-key map (kbd "M-DEL") #'vterm-send-meta-backspace)
(define-key map [C-backspace] #'vterm-send-meta-backspace)
(define-key map [return] #'vterm-send-return)
(define-key map (kbd "RET") #'vterm-send-return)
(define-key map [C-left] #'vterm--self-insert)
(define-key map [M-left] #'vterm--self-insert)
(define-key map [C-right] #'vterm--self-insert)
(define-key map [M-right] #'vterm--self-insert)
(define-key map [C-up] #'vterm--self-insert)
(define-key map [C-down] #'vterm--self-insert)
(define-key map [M-up] #'vterm--self-insert)
(define-key map [M-down] #'vterm--self-insert)
(define-key map [left] #'vterm--self-insert)
(define-key map [right] #'vterm--self-insert)
(define-key map [up] #'vterm--self-insert)
(define-key map [down] #'vterm--self-insert)
(define-key map [prior] #'vterm--self-insert)
(define-key map [S-prior] #'scroll-down-command)
(define-key map [next] #'vterm--self-insert)
(define-key map [S-next] #'scroll-up-command)
(define-key map [home] #'vterm--self-insert)
(define-key map [end] #'vterm--self-insert)
(define-key map [C-home] #'vterm--self-insert)
(define-key map [C-end] #'vterm--self-insert)
(define-key map [escape] #'vterm--self-insert)
(define-key map [remap yank] #'vterm-yank)
(define-key map [remap xterm-paste] #'vterm-xterm-paste)
(define-key map [remap yank-pop] #'vterm-yank-pop)
(define-key map [remap mouse-yank-primary] #'vterm-yank-primary)
(define-key map [mouse-1] #'vterm-mouse-set-point)
(define-key map (kbd "C-SPC") #'vterm--self-insert)
(define-key map (kbd "S-SPC") #'vterm-send-space)
(define-key map (kbd "C-_") #'vterm--self-insert)
(define-key map [remap undo] #'vterm-undo)
(define-key map (kbd "M-.") #'vterm--self-insert)
(define-key map (kbd "M-,") #'vterm--self-insert)
(define-key map (kbd "C-c C-y") #'vterm--self-insert)
(define-key map (kbd "C-c C-c") #'vterm--self-insert)
(define-key map (kbd "C-c C-l") #'vterm-clear-scrollback)
(define-key map (kbd "C-l") #'vterm-clear)
(define-key map (kbd "C-\\") #'vterm--self-insert)
(define-key map (kbd "C-c C-g") #'vterm--self-insert)
(define-key map (kbd "C-c C-u") #'vterm--self-insert)
(define-key map [remap self-insert-command] #'vterm--self-insert)
(define-key map (kbd "C-c C-r") #'vterm-reset-cursor-point)
(define-key map (kbd "C-c C-n") #'vterm-next-prompt)
(define-key map (kbd "C-c C-p") #'vterm-previous-prompt)
(define-key map (kbd "C-c C-t") #'vterm-copy-mode)
map))
(defvar vterm-copy-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "C-c C-t") #'vterm-copy-mode)
(define-key map [return] #'vterm-copy-mode-done)
(define-key map (kbd "RET") #'vterm-copy-mode-done)
(define-key map (kbd "C-c C-r") #'vterm-reset-cursor-point)
(define-key map (kbd "C-a") #'vterm-beginning-of-line)
(define-key map (kbd "C-e") #'vterm-end-of-line)
(define-key map (kbd "C-c C-n") #'vterm-next-prompt)
(define-key map (kbd "C-c C-p") #'vterm-previous-prompt)
map))
;;; Mode
(define-derived-mode vterm-mode fundamental-mode "VTerm"
"Major mode for vterm buffer."
(buffer-disable-undo)
(and (boundp 'display-line-numbers)
(let ((font-height (expt text-scale-mode-step text-scale-mode-amount)))
(setq vterm--linenum-remapping
(face-remap-add-relative 'line-number :height font-height))))
(hack-dir-local-variables)
(let ((vterm-env (assq 'vterm-environment dir-local-variables-alist)))
(when vterm-env
(make-local-variable 'vterm-environment)
(setq vterm-environment (cdr vterm-env))))
(let ((process-environment (append vterm-environment
`(,(concat "TERM="
vterm-term-environment-variable)
,(concat "EMACS_VTERM_PATH="
(file-name-directory (find-library-name "vterm")))
"INSIDE_EMACS=vterm"
"LINES"
"COLUMNS")
process-environment))
;; TODO: Figure out why inhibit is needed for curses to render correctly.
(inhibit-eol-conversion nil)
(coding-system-for-read 'binary)
(process-adaptive-read-buffering nil)
(width (max (- (window-max-chars-per-line) (vterm--get-margin-width))
vterm-min-window-width)))
(setq vterm--term (vterm--new (window-body-height)
width vterm-max-scrollback
vterm-disable-bold-font
vterm-disable-underline
vterm-disable-inverse-video
vterm-ignore-blink-cursor
vterm-set-bold-hightbright))
(setq buffer-read-only t)
(setq-local scroll-conservatively 101)
(setq-local scroll-margin 0)
(setq-local hscroll-margin 0)
(setq-local hscroll-step 1)
(setq-local truncate-lines t)
;; Disable all automatic fontification
(setq-local font-lock-defaults '(nil t))
(add-function :filter-return
(local 'filter-buffer-substring-function)
#'vterm--filter-buffer-substring)
(setq vterm--process
(make-process
:name "vterm"
:buffer (current-buffer)
:command
`("/bin/sh" "-c"
,(format
"stty -nl sane %s erase ^? rows %d columns %d >/dev/null && exec %s"
;; Some stty implementations (i.e. that of *BSD) do not
;; support the iutf8 option. to handle that, we run some
;; heuristics to work out if the system supports that
;; option and set the arg string accordingly. This is a
;; gross hack but FreeBSD doesn't seem to want to fix it.
;;
;; See: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220009
(if (eq system-type 'berkeley-unix) "" "iutf8")
(window-body-height)
width (vterm--get-shell)))
;; :coding 'no-conversion
:connection-type 'pty
:file-handler t
:filter #'vterm--filter
;; The sentinel is needed if there are exit functions or if
;; vterm-kill-buffer-on-exit is set to t. In this latter case,
;; vterm--sentinel will kill the buffer
:sentinel (when (or vterm-exit-functions
vterm-kill-buffer-on-exit)
#'vterm--sentinel))))
;; Change major-mode is not allowed
;; Vterm interfaces with an underlying process. Changing the major
;; mode can break this, leading to segmentation faults.
(add-hook 'change-major-mode-hook
(lambda () (interactive)
(user-error "You cannot change major mode in vterm buffers")) nil t)
(vterm--set-pty-name vterm--term (process-tty-name vterm--process))
(process-put vterm--process 'adjust-window-size-function
#'vterm--window-adjust-process-window-size)
;; Set the truncation slot for 'buffer-display-table' to the ASCII code for a
;; space character (32) to make the vterm buffer display a space instead of
;; the default truncation character ($) when a line is truncated.
(let* ((display-table (or buffer-display-table (make-display-table))))
(set-display-table-slot display-table 'truncation 32)
(setq buffer-display-table display-table))
;; Support to compilation-shell-minor-mode
;; Is this necessary? See vterm--compilation-setup
(setq next-error-function 'vterm-next-error-function)
(setq-local bookmark-make-record-function 'vterm--bookmark-make-record))
(defun vterm--tramp-get-shell (method)
"Get the shell for a remote location as specified in `vterm-tramp-shells'.
The argument METHOD is the method string (as used by tramp) to get the shell
for, or t to get the default shell for all methods."
(let* ((specs (cdr (assoc method vterm-tramp-shells)))
(first (car specs))
(second (cadr specs)))
;; Allow '(... login-shell) or '(... 'login-shell).
(if (or (eq first 'login-shell)
(and (consp first) (eq (cadr first) 'login-shell)))
;; If the first element is 'login-shell, try to determine the user's
;; login shell on the remote host. This should work for all
;; POSIX-compliant systems with the getent command in PATH. This
;; includes regular GNU/Linux distros, *BSDs, but not MacOS X. If
;; the login-shell determination fails at any point, the second
;; element in the shell spec is used (if present, otherwise nil is
;; returned).
(let* ((entry (ignore-errors
(with-output-to-string
(with-current-buffer standard-output
;; The getent command returns the passwd entry
;; for the specified user independently of the
;; used name service (i.e., not only for static
;; passwd files, but also for LDAP, etc).
;;
;; Use a shell command here to get $LOGNAME.
;; Using the tramp user does not always work as
;; it can be nil, e.g., with ssh host configs.
;; $LOGNAME is defined in all POSIX-compliant
;; systems.
(unless (= 0 (process-file-shell-command
"getent passwd $LOGNAME"
nil (current-buffer) nil))
(error "Unexpected return value"))
;; If we have more than one line, the output is
;; not the expected single passwd entry.
;; Most likely, $LOGNAME is not set.
(when (> (count-lines (point-min) (point-max)) 1)
(error "Unexpected output"))))))
(shell (when entry
;; The returned Unix passwd entry is a colon-
;; separated line. The 6th (last) element specifies
;; the user's shell.
(nth 6 (split-string entry ":" nil "[ \t\n\r]+")))))
(or shell second))
first)))
(defun vterm--get-shell ()
"Get the shell that gets run in the vterm."
(if (ignore-errors (file-remote-p default-directory))
(with-parsed-tramp-file-name default-directory nil
(or (vterm--tramp-get-shell method)
(vterm--tramp-get-shell t)
(with-connection-local-variables shell-file-name)
vterm-shell))
vterm-shell))
(defun vterm--bookmark-make-record ()
"Create a vterm bookmark.
Notes down the current directory and buffer name."
`(nil
(handler . vterm--bookmark-handler)
(thisdir . ,default-directory)
(buf-name . ,(buffer-name))
(defaults . nil)))
;;;###autoload
(defun vterm--bookmark-handler (bmk)
"Handler to restore a vterm bookmark BMK.
If a vterm buffer of the same name does not exist, the function will create a
new vterm buffer of the name. It also checks the current directory and sets
it to the bookmarked directory if needed."
(let* ((thisdir (bookmark-prop-get bmk 'thisdir))
(buf-name (bookmark-prop-get bmk 'buf-name))
(buf (get-buffer buf-name))
(thismode (and buf (with-current-buffer buf major-mode))))
;; create if no such vterm buffer exists
(when (or (not buf) (not (eq thismode 'vterm-mode)))
(setq buf (generate-new-buffer buf-name))
(with-current-buffer buf
(when vterm-bookmark-check-dir
(setq default-directory thisdir))
(vterm-mode)))
;; check the current directory
(with-current-buffer buf
(when (and vterm-bookmark-check-dir
(not (string-equal default-directory thisdir)))
(when vterm-copy-mode
(vterm-copy-mode-done nil))
(vterm-insert (concat "cd " thisdir))
(vterm-send-return)))
;; set to this vterm buf
(set-buffer buf)))
(defun vterm--compilation-setup ()
"Function to enable the option `compilation-shell-minor-mode' for vterm.
`'compilation-shell-minor-mode' would change the value of local
variable `next-error-function', so we should call this function in
`compilation-shell-minor-mode-hook'."
(when (or (eq major-mode 'vterm-mode)
(derived-mode-p 'vterm-mode))
(setq next-error-function 'vterm-next-error-function)))
(add-hook 'compilation-shell-minor-mode-hook #'vterm--compilation-setup)
;;;###autoload
(defun vterm-next-error-function (n &optional reset)
"Advance to the next error message and visit the file where the error was.
This is the value of `next-error-function' in Compilation
buffers. Prefix arg N says how many error messages to move
forwards (or backwards, if negative).
Optional argument RESET clears all the errors."
(interactive "p")
(let* ((pt (point))
(default-directory default-directory)
(pwd (vterm--get-pwd)))
(when pwd
(setq default-directory pwd))
(goto-char pt)
(compilation-next-error-function n reset)))
;;; Copy Mode
(defun vterm--enter-copy-mode ()
(use-local-map nil)
(vterm-send-stop)
(when vterm-copy-mode-remove-fake-newlines
(save-excursion
(setq truncate-lines nil)
(vterm--remove-fake-newlines t))))
(defun vterm--exit-copy-mode ()
(when vterm-copy-mode-remove-fake-newlines
(save-excursion
(setq truncate-lines t)
(vterm--reinsert-fake-newlines)))
(vterm-reset-cursor-point)
(use-local-map vterm-mode-map)
(vterm-send-start))
(define-minor-mode vterm-copy-mode
"Toggle `vterm-copy-mode'.
When `vterm-copy-mode' is enabled, the terminal will not display
additional output received from the underlying process and will
behave similarly to buffer in `fundamental-mode'. This mode is
typically used to copy text from vterm buffers.
A conventient way to exit `vterm-copy-mode' is with
`vterm-copy-mode-done', which copies the selected text and exit
`vterm-copy-mode'."
:group 'vterm