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copilot.el
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;;; copilot.el --- An unofficial Copilot plugin for Emacs -*- lexical-binding: t; -*-
;; Copyright (C) 2022-2024 copilot-emacs maintainers
;; Author: zerol <[email protected]>
;; Maintainer: Emil van der Westhuizen
;; Shen, Jen-Chieh <[email protected]>
;; Rakotomandimby Mihamina <[email protected]>
;; URL: https://github.com/copilot-emacs/copilot.el
;; Package-Requires: ((emacs "27.2") (s "1.12.0") (dash "2.19.1") (editorconfig "0.8.2") (jsonrpc "1.0.14") (f "0.20.0"))
;; Version: 0.0.1
;; Keywords: convenience copilot
;; The MIT License (MIT)
;; Permission is hereby granted, free of charge, to any person obtaining a copy
;; of this software and associated documentation files (the "Software"), to deal
;; in the Software without restriction, including without limitation the rights
;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
;; copies of the Software, and to permit persons to whom the Software is
;; furnished to do so, subject to the following conditions:
;; The above copyright notice and this permission notice shall be included in all
;; copies or substantial portions of the Software.
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.
;;; Commentary:
;; An unofficial Copilot plugin for Emacs
;;; Code:
(require 'cl-lib)
(require 'compile)
(require 'json)
(require 'jsonrpc)
(require 'f)
(require 's)
(require 'dash)
(require 'editorconfig)
(require 'copilot-balancer)
(defgroup copilot nil
"Copilot."
:group 'completion
:prefix "copilot-")
(defcustom copilot-idle-delay 0
"Time in seconds to wait before starting completion.
Complete immediately if set to 0.
Disable idle completion if set to nil."
:type '(choice
(number :tag "Seconds of delay")
(const :tag "Idle completion disabled" nil))
:group 'copilot)
(defcustom copilot-network-proxy nil
"Network proxy to use for Copilot.
Nil means no proxy.
Format: \='(:host \"127.0.0.1\" :port 80 :username \"username\"
:password \"password\")
Username and password are optional.
If you are using a MITM proxy which intercepts TLS connections, you may need
to disable TLS verification. This can be done by setting a pair
':rejectUnauthorized :json-false' in the proxy plist. For example:
(:host \"127.0.0.1\" :port 80 :rejectUnauthorized :json-false)"
:type '(plist :tag "Uncheck all to disable proxy" :key-type symbol)
:options '((:host string) (:port integer) (:username string) (:password string))
:group 'copilot)
(defcustom copilot-log-max 0
"Max size of events buffer.
0 disables, nil means infinite. Enabling event logging may slightly affect
performance."
:group 'copilot
:type 'integer)
(defcustom copilot-node-executable (executable-find "node")
"Node executable path."
:group 'copilot
:type 'string)
(defcustom copilot-server-args '("--stdio")
"Additional arguments to pass to the Copilot server."
:group 'copilot
:type '(repeat string))
(defcustom copilot-max-char 100000
"Maximum number of characters to send to Copilot, -1 means no limit."
:group 'copilot
:type 'integer)
(defcustom copilot-clear-overlay-ignore-commands nil
"List of commands that should not clear the overlay when called."
:group 'copilot
:type '(repeat function))
(defcustom copilot-indent-offset-warning-disable nil
"Disable indentation warnings.
Warning occurs when the function `copilot--infer-indentation-offset' cannot
find indentation offset."
:group 'copilot
:type 'boolean)
(defcustom copilot-indentation-alist
(append '((emacs-lisp-mode lisp-indent-offset)
(latex-mode tex-indent-basic)
(lisp-mode lisp-indent-offset)
(nxml-mode nxml-child-indent)
(python-mode python-indent py-indent-offset python-indent-offset)
(python-ts-mode python-indent py-indent-offset python-indent-offset)
(web-mode web-mode-markup-indent-offset web-mode-html-offset))
editorconfig-indentation-alist)
"Alist of `major-mode' to indentation map with optional fallbacks."
:type '(alist :key-type symbol :value-type (choice integer symbol))
:group 'copilot)
(defconst copilot-server-package-name "copilot-node-server"
"The name of the package to install copilot server.")
(defcustom copilot-install-dir (expand-file-name
(locate-user-emacs-file (f-join ".cache" "copilot")))
"Directory in which the servers will be installed."
:risky t
:type 'directory
:group 'copilot)
(defvar copilot--server-executable nil
"The dist directory containing agent.js file.")
(defcustom copilot-version "1.27.0"
"Copilot version.
The default value is the preferred version and ensures functionality.
You may adjust this variable at your own risk."
:type 'string
:group 'copilot)
(defvar-local copilot--overlay nil
"Overlay for Copilot completion.")
(defvar-local copilot--keymap-overlay nil
"Overlay used to surround point and make copilot-completion-keymap activate.")
(defvar copilot--connection nil
"Copilot agent jsonrpc connection instance.")
(defvar-local copilot--line-bias 1
"Line bias for Copilot completion.")
(defvar copilot--post-command-timer nil)
(defvar-local copilot--last-doc-version 0
"The document version of the last completion.")
(defvar-local copilot--doc-version 0
"The document version of the current buffer.
Incremented after each change.")
(defun copilot--buffer-changed ()
"Return non-nil if the buffer has changed since last completion."
(not (= copilot--last-doc-version copilot--doc-version)))
(defvar copilot--opened-buffers nil
"List of buffers that have been opened in Copilot.")
;;
;; Externals
;;
(declare-function vterm-delete-region "ext:vterm.el")
(declare-function vterm-insert "ext:vterm.el")
(declare-function org-sort-entries "ext:org.el")
(declare-function org-entry-get "ext:org.el")
(declare-function org-map-entries "ext:org.el")
;;
;; Entry
;;
(defvar copilot-mode-map (make-sparse-keymap)
"Keymap for Copilot minor mode.
Use this for custom bindings in `copilot-mode'.")
(defun copilot--mode-enter ()
"Set up copilot mode when entering."
(add-hook 'post-command-hook #'copilot--post-command nil 'local)
(add-hook 'before-change-functions #'copilot--on-doc-change nil 'local)
(add-hook 'after-change-functions #'copilot--on-doc-change nil 'local)
;; Hook onto both window-selection-change-functions and window-buffer-change-functions
;; since both are separate ways of 'focussing' a buffer.
(add-hook 'window-selection-change-functions #'copilot--on-doc-focus nil 'local)
(add-hook 'window-buffer-change-functions #'copilot--on-doc-focus nil 'local)
(add-hook 'kill-buffer-hook #'copilot--on-doc-close nil 'local)
;; The mode may be activated manually while focus remains on the current window/buffer.
(copilot--on-doc-focus (selected-window)))
(defun copilot--mode-exit ()
"Clean up copilot mode when exiting."
(remove-hook 'post-command-hook #'copilot--post-command 'local)
(remove-hook 'before-change-functions #'copilot--on-doc-change 'local)
(remove-hook 'after-change-functions #'copilot--on-doc-change 'local)
(remove-hook 'window-selection-change-functions #'copilot--on-doc-focus 'local)
(remove-hook 'window-buffer-change-functions #'copilot--on-doc-focus 'local)
(remove-hook 'kill-buffer-hook #'copilot--on-doc-close 'local)
;; Send the close event for the active buffer since activating the mode will open it again.
(copilot--on-doc-close))
;;;###autoload
(define-minor-mode copilot-mode
"Minor mode for Copilot."
:init-value nil
:lighter " Copilot"
(copilot-clear-overlay)
(advice-add 'posn-at-point :before-until #'copilot--posn-advice)
(if copilot-mode
(copilot--mode-enter)
(copilot--mode-exit)))
(defun copilot-turn-on-unless-buffer-read-only ()
"Turn on `copilot-mode' if the buffer is writable."
(unless buffer-read-only
(copilot-mode 1)))
;;;###autoload
(define-global-minor-mode global-copilot-mode
copilot-mode copilot-turn-on-unless-buffer-read-only)
;;
;; agent
;;
(defconst copilot--ignore-response
(lambda (_))
"Simply ignore the response.")
(defsubst copilot--connection-alivep ()
"Non-nil if the `copilot--connection' is alive."
(and copilot--connection
(zerop (process-exit-status (jsonrpc--process copilot--connection)))))
(defmacro copilot--request (&rest args)
"Send a request to the copilot agent with ARGS."
`(progn
(unless (copilot--connection-alivep)
(copilot--start-agent))
(jsonrpc-request copilot--connection ,@args)))
(defmacro copilot--notify (&rest args)
"Send a notification to the copilot agent with ARGS."
`(progn
(unless (copilot--connection-alivep)
(copilot--start-agent))
(jsonrpc-notify copilot--connection ,@args)))
(cl-defmacro copilot--async-request (method params &rest args &key (success-fn #'copilot--ignore-response) &allow-other-keys)
"Send an asynchronous request to the copilot agent.
Arguments METHOD, PARAMS and ARGS are used in function `jsonrpc-async-request'.
SUCCESS-FN is the CALLBACK."
`(progn
(unless (copilot--connection-alivep)
(copilot--start-agent))
;; jsonrpc will use temp buffer for callbacks, so we need to save the current buffer and restore it inside callback
(let ((buf (current-buffer)))
(jsonrpc-async-request copilot--connection
,method ,params
:success-fn (lambda (result)
(if (buffer-live-p buf)
(with-current-buffer buf
(funcall ,success-fn result))))
,@args))))
(defun copilot--make-connection ()
"Establish copilot jsonrpc connection."
(let ((make-fn (apply-partially
#'make-instance
'jsonrpc-process-connection
:name "copilot"
:notification-dispatcher #'copilot--handle-notification
:process (make-process :name "copilot agent"
:command (append
(list copilot-node-executable
(copilot-server-executable))
copilot-server-args)
:coding 'utf-8-emacs-unix
:connection-type 'pipe
:stderr (get-buffer-create "*copilot stderr*")
:noquery t))))
(condition-case nil
(funcall make-fn :events-buffer-config `(:size ,copilot-log-max))
(invalid-slot-name
;; handle older jsonrpc versions
(funcall make-fn :events-buffer-scrollback-size copilot-log-max)))))
(defun copilot--start-agent ()
"Start the copilot agent process in local."
(cond
((null copilot-node-executable)
(user-error "Could not find node executable"))
((not (file-exists-p copilot-install-dir))
(user-error "Server is not installed, please install via `M-x copilot-install-server`"))
(t
(unless (equal (copilot-installed-version) copilot-version)
(warn "Newer versions of the Copilot server are available for installation.
Please upgrade the server via `M-x copilot-reinstall-server`"))
(let ((node-version (->> (with-output-to-string
(call-process copilot-node-executable nil standard-output nil "--version"))
(s-trim)
(s-chop-prefix "v")
(string-to-number))))
(cond ((< node-version 18)
(user-error "Node 18+ is required but found %s" node-version))
(t
(setq copilot--connection (copilot--make-connection))
(message "Copilot agent started.")
(copilot--request 'initialize '(:capabilities (:workspace (:workspaceFolders t))))
(copilot--async-request 'setEditorInfo
`(:editorInfo (:name "Emacs" :version ,emacs-version)
:editorPluginInfo (:name "copilot.el" :version ,copilot-version)
,@(when copilot-network-proxy
`(:networkProxy ,copilot-network-proxy))))))))))
;;
;; login / logout
;;
(eval-and-compile
(defun copilot--transform-pattern (pattern)
"Transform PATTERN to (&plist PATTERN) recursively."
(cons '&plist
(mapcar (lambda (p)
(if (listp p)
(copilot--transform-pattern p)
p))
pattern))))
(defmacro copilot--dbind (pattern source &rest body)
"Destructure SOURCE against plist PATTERN and eval BODY."
(declare (indent 2))
`(-let ((,(copilot--transform-pattern pattern) ,source))
,@body))
(defun copilot-login ()
"Login to Copilot."
(interactive)
(copilot--dbind
(:status :user :userCode user-code :verificationUri verification-uri)
(copilot--request 'signInInitiate '(:dummy "signInInitiate"))
(if (s-equals-p status "AlreadySignedIn")
(message (format "Already signed into copilot as %s" user))
(if (display-graphic-p)
(progn
(gui-set-selection 'CLIPBOARD user-code)
(read-from-minibuffer (format "Your one-time code %s is copied. Press \
ENTER to open GitHub in your browser. If your browser does not open \
automatically, browse to %s." user-code verification-uri))
(browse-url verification-uri)
(read-from-minibuffer "Press ENTER if you finish authorizing."))
(read-from-minibuffer (format "First copy your one-time code: %s. Press ENTER to continue." user-code))
(read-from-minibuffer (format "Please open %s in your browser. Press ENTER if you finish authorizing." verification-uri)))
(message "Verifying...")
(condition-case err
(copilot--request 'signInConfirm (list :userCode user-code))
(jsonrpc-error
(user-error "Authentication failure: %s" (alist-get 'jsonrpc-error-message (cddr err)))))
(copilot--dbind (:user) (copilot--request 'checkStatus '(:dummy "checkStatus"))
(message "Authenticated as GitHub user %s." user)))
))
(defun copilot-logout ()
"Logout from Copilot."
(interactive)
(copilot--request 'signOut '(:dummy "signOut"))
(message "Logged out."))
;;
;; diagnose
;;
(defun copilot-diagnose ()
"Restart and diagnose copilot."
(interactive)
(when copilot--connection
(jsonrpc-shutdown copilot--connection)
(setq copilot--connection nil))
(setq copilot--opened-buffers nil)
;; We are going to send a test request for the current buffer so we have to activate the mode
;; if it is not already activated.
;; If it the mode is already active, we have to make sure the current buffer is loaded in the
;; agent.
(if copilot-mode
(copilot--on-doc-focus (selected-window))
(copilot-mode))
(copilot--async-request 'getCompletions
`(:doc (:version 0
:source "\n"
:path ""
:uri ,(copilot--get-uri)
:relativePath ""
:languageId "text"
:position (:line 0 :character 0)))
:success-fn (lambda (_)
(message "Copilot OK."))
:error-fn (lambda (err)
(message "Copilot error: %S" err))
:timeout-fn (lambda ()
(message "Copilot agent timeout."))))
;;
;; Auto completion
;;
;; based on https://code.visualstudio.com/docs/languages/identifiers
;; (more here https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/)
(defvar copilot-major-mode-alist '(("rustic" . "rust")
("cperl" . "perl")
("c++" . "cpp")
("clojure" . "clojure")
("clojurescript" . "clojure")
("objc" . "objective-c")
("cuda" . "cuda-cpp")
("docker-compose" . "dockercompose")
("coffee" . "coffeescript")
("js" . "javascript")
("js2" . "javascript")
("js2-jsx" . "javascriptreact")
("typescript-tsx" . "typescriptreact")
("rjsx" . "typescriptreact")
("less-css" . "less")
("caml" . "ocaml")
("tuareg" . "ocaml")
("text" . "plaintext")
("ess-r" . "r")
("enh-ruby" . "ruby")
("shell-script" . "shellscript")
("sh" . "shellscript")
("visual-basic" . "vb")
("nxml" . "xml"))
"Alist mapping major mode names (with -mode removed) to copilot language ID's.")
(defvar copilot-minor-mode-alist '(("git-commit" . "git-commit"))
"Alist mapping minor mode names (with -mode removed) to copilot language ID's.")
(defvar-local copilot--completion-cache nil)
(defvar-local copilot--completion-idx 0)
(defvar-local copilot--indent-warning-printed-p nil
"Flag indicating whether indent warning was already printed.")
(defun copilot--infer-indentation-offset ()
"Infer indentation offset."
(or (let ((mode major-mode))
(while (and (not (assq mode copilot-indentation-alist))
(setq mode (get mode 'derived-mode-parent))))
(when mode
(let ((indent-spec (alist-get mode copilot-indentation-alist)))
(cond
((listp indent-spec)
(cl-some (lambda (s)
(cond ((numberp s) s)
((and (boundp s) (numberp (symbol-value s)))
(symbol-value s))))
indent-spec))
((functionp indent-spec) ; editorconfig 0.11.0+
;; This points to a setter, which do not call
nil)))))
(progn
(when (and
(not copilot-indent-offset-warning-disable)
(not copilot--indent-warning-printed-p))
(display-warning '(copilot copilot-no-mode-indent)
(format "copilot--infer-indentation-offset found no mode-specific indentation offset for mode %s." mode))
(setq-local copilot--indent-warning-printed-p t))
standard-indent)))
(defun copilot--get-relative-path ()
"Get relative path to current buffer."
(cond
((not buffer-file-name)
"")
((fboundp 'projectile-project-root)
(file-relative-name buffer-file-name (projectile-project-root)))
((boundp 'vc-root-dir)
(file-relative-name buffer-file-name (vc-root-dir)))
(t
(file-name-nondirectory buffer-file-name))))
(defun copilot--get-uri ()
"Get URI of current buffer."
(cond
((not buffer-file-name)
(concat "buffer://" (url-encode-url (buffer-name (current-buffer)))))
((and (eq system-type 'windows-nt)
(not (s-starts-with-p "/" buffer-file-name)))
(concat "file:///" (url-encode-url buffer-file-name)))
(t
(concat "file://" (url-encode-url buffer-file-name)))))
(defun copilot--get-source ()
"Get source code from current buffer."
(let* ((p (point))
(pmax (point-max))
(pmin (point-min))
(half-window (/ copilot-max-char 2)))
(when (and (>= copilot-max-char 0) (> pmax copilot-max-char))
(display-warning '(copilot copilot-exceeds-max-char)
(format "%s size exceeds 'copilot-max-char' (%s), copilot completions may not work in mode %s" (current-buffer) copilot-max-char major-mode)))
(cond
;; using whole buffer
((or (< copilot-max-char 0) (< pmax copilot-max-char))
(setq-local copilot--line-bias 1)
(buffer-substring-no-properties pmin pmax))
;; truncate buffer head
((< (- pmax p) half-window)
(setq-local copilot--line-bias (line-number-at-pos (- pmax copilot-max-char)))
(buffer-substring-no-properties (- pmax copilot-max-char) pmax))
;; truncate buffer tail
((< (- p pmin) half-window)
(setq-local copilot--line-bias 1)
(buffer-substring-no-properties pmin (+ pmin copilot-max-char)))
;; truncate head and tail
(t
(setq-local copilot--line-bias (line-number-at-pos (- p half-window)))
(buffer-substring-no-properties (- p half-window)
(+ p half-window))))))
(defun copilot--get-minor-mode-language-id ()
"Get language ID from minor mode if available."
(let ((pair
(seq-find
(lambda (pair)
(let ((minor-mode-symbol (intern (concat (car pair) "-mode"))))
(and (boundp minor-mode-symbol) (symbol-value minor-mode-symbol))))
copilot-minor-mode-alist)))
(cdr pair)))
(defun copilot--get-major-mode-language-id ()
"Get language ID from major mode."
(let ((major-mode-symbol (s-chop-suffixes '("-ts-mode" "-mode") (symbol-name major-mode))))
(alist-get major-mode copilot-major-mode-alist major-mode-symbol nil 'equal)))
(defun copilot--get-language-id ()
"Get language ID of current buffer."
(or (copilot--get-minor-mode-language-id)
(copilot--get-major-mode-language-id)))
(defun copilot--generate-doc ()
"Generate doc parameters for completion request."
(save-restriction
(widen)
(list :version copilot--doc-version
:tabSize tab-width
:indentSize (copilot--infer-indentation-offset)
:insertSpaces (if indent-tabs-mode :json-false t)
:path (buffer-file-name)
:uri (copilot--get-uri)
:relativePath (copilot--get-relative-path)
:languageId (copilot--get-language-id)
:position (list :line (- (line-number-at-pos) copilot--line-bias)
:character (- (point) (line-beginning-position))))))
(defun copilot--get-completion (callback)
"Get completion with CALLBACK."
(copilot--async-request 'getCompletions
(list :doc (copilot--generate-doc))
:success-fn callback))
(defun copilot--get-completions-cycling (callback)
"Get completion cycling options with CALLBACK."
(if copilot--completion-cache
(funcall callback copilot--completion-cache)
(copilot--async-request 'getCompletionsCycling
(list :doc (copilot--generate-doc))
:success-fn callback)))
(defun copilot--cycle-completion (direction)
"Cycle completion with DIRECTION."
(lambda (result)
(unless copilot--completion-cache
(setq copilot--completion-cache result))
(let ((completions (cl-remove-duplicates (plist-get result :completions)
:key (lambda (x) (plist-get x :text))
:test #'s-equals-p)))
(cond ((seq-empty-p completions)
(message "No completion is available."))
((= (length completions) 1)
(message "Only one completion is available."))
(t (let ((idx (mod (+ copilot--completion-idx direction)
(length completions))))
(setq copilot--completion-idx idx)
(let ((completion (elt completions idx)))
(copilot--show-completion completion))))))))
(defsubst copilot--overlay-visible ()
"Return whether the `copilot--overlay' is available."
(and (overlayp copilot--overlay)
(overlay-buffer copilot--overlay)))
(defun copilot-next-completion ()
"Cycle to next completion."
(interactive)
(when (copilot--overlay-visible)
(copilot--get-completions-cycling (copilot--cycle-completion 1))))
(defun copilot-previous-completion ()
"Cycle to previous completion."
(interactive)
(when (copilot--overlay-visible)
(copilot--get-completions-cycling (copilot--cycle-completion -1))))
(defvar copilot--panel-lang nil
"Language of current panel solutions.")
(defun copilot--handle-notification (_ method msg)
"Handle MSG of type METHOD."
(when (eql method 'PanelSolution)
(copilot--dbind (:completionText completion-text :score completion-score) msg
(with-current-buffer "*copilot-panel*"
(unless (member (secure-hash 'sha256 completion-text)
(org-map-entries (lambda () (org-entry-get nil "SHA"))))
(save-excursion
(goto-char (point-max))
(insert "* Solution\n"
" :PROPERTIES:\n"
" :SCORE: " (number-to-string completion-score) "\n"
" :SHA: " (secure-hash 'sha256 completion-text) "\n"
" :END:\n"
"#+BEGIN_SRC " copilot--panel-lang "\n"
completion-text "\n#+END_SRC\n\n")
(call-interactively #'mark-whole-buffer)
(org-sort-entries nil ?R nil nil "SCORE"))))))
(when (eql method 'PanelSolutionsDone)
(message "Copilot: Finish synthesizing solutions.")
(display-buffer "*copilot-panel*")
(with-current-buffer "*copilot-panel*"
(save-excursion
(goto-char (point-max))
(insert "End of solutions.\n")))))
(defun copilot--get-panel-completions (callback)
"Get panel completions with CALLBACK."
(copilot--async-request 'getPanelCompletions
(list :doc (copilot--generate-doc)
:panelId (generate-new-buffer-name "copilot-panel"))
:success-fn callback
:error-fn (lambda (err)
(message "Copilot error: %S" err))
:timeout-fn (lambda ()
(message "Copilot agent timeout."))))
(defun copilot-panel-complete ()
"Pop a buffer with a list of suggested completions based on the current file ."
(interactive)
(require 'org)
(setq copilot--last-doc-version copilot--doc-version)
(setq copilot--panel-lang (copilot--get-language-id))
(copilot--get-panel-completions
(jsonrpc-lambda (&key solutionCountTarget)
(message "Copilot: Synthesizing %d solutions..." solutionCountTarget)))
(with-current-buffer (get-buffer-create "*copilot-panel*")
(org-mode)
(erase-buffer)))
;;
;; UI
;;
(defun copilot-current-completion ()
"Get current completion."
(and (copilot--overlay-visible)
(overlay-get copilot--overlay 'completion)))
(defface copilot-overlay-face
'((t :inherit shadow))
"Face for Copilot overlay.")
(defvar-local copilot--real-posn nil
"Posn information without overlay.
To work around posn problems with after-string property.")
(defconst copilot-completion-map (make-sparse-keymap)
"Keymap for Copilot completion overlay.")
(defun copilot--posn-advice (&rest args)
"Remap posn if in copilot-mode with ARGS."
(when copilot-mode
(let ((pos (or (car-safe args) (point))))
(when (and copilot--real-posn
(eq pos (car copilot--real-posn)))
(cdr copilot--real-posn)))))
(defun copilot--get-or-create-keymap-overlay ()
"Make or return the local copilot--keymap-overlay."
(unless (overlayp copilot--keymap-overlay)
(setq copilot--keymap-overlay (make-overlay 1 1 nil nil t))
(overlay-put copilot--keymap-overlay 'keymap copilot-completion-map)
(overlay-put copilot--keymap-overlay 'priority 101))
copilot--keymap-overlay)
(defun copilot--get-overlay ()
"Create or get overlay for Copilot."
(unless (overlayp copilot--overlay)
(setq copilot--overlay (make-overlay 1 1 nil nil t))
(overlay-put
copilot--overlay 'keymap-overlay (copilot--get-or-create-keymap-overlay)))
copilot--overlay)
(defun copilot--overlay-end (ov)
"Return the end position of overlay OV."
(- (line-end-position) (overlay-get ov 'tail-length)))
(defun copilot--set-overlay-text (ov completion)
"Set overlay OV with COMPLETION."
(move-overlay ov (point) (line-end-position))
;; set overlay position for the keymap, to activate copilot-completion-map
;;
;; if the point is at the end of the buffer, we will create a
;; 0-length buffer. But this is ok, since the keymap will still
;; activate _so long_ as no other overlay contains the point.
;;
;; see https://github.com/copilot-emacs/copilot.el/issues/251 for details.
(move-overlay (overlay-get ov 'keymap-overlay) (point) (min (point-max) (+ 1 (point))))
(let* ((tail (buffer-substring (copilot--overlay-end ov) (line-end-position)))
(p-completion (concat (propertize completion 'face 'copilot-overlay-face)
tail)))
(if (eolp)
(progn
(overlay-put ov 'after-string "") ; make sure posn is correct
(setq copilot--real-posn (cons (point) (posn-at-point)))
(put-text-property 0 1 'cursor t p-completion)
(overlay-put ov 'display "")
(overlay-put ov 'after-string p-completion))
(overlay-put ov 'display (substring p-completion 0 1))
(overlay-put ov 'after-string (substring p-completion 1)))
(overlay-put ov 'completion completion)
(overlay-put ov 'start (point))))
(defun copilot--display-overlay-completion (completion uuid start end)
"Show COMPLETION with UUID between START and END.
`save-excursion' is not necessary since there is only one caller, and they are
already saving an excursion. This is also a private function."
(copilot-clear-overlay)
(when (and (s-present-p completion)
(or (= start (point)) ; up-to-date completion
(and (< start (point)) ; special case for removing indentation
(s-blank-p (s-trim (buffer-substring-no-properties start (point)))))))
(goto-char start) ; indentation
(let* ((ov (copilot--get-overlay)))
(overlay-put ov 'tail-length (- (line-end-position) end))
(copilot--set-overlay-text ov completion)
(overlay-put ov 'uuid uuid)
(copilot--async-request 'notifyShown (list :uuid uuid)))))
(defun copilot-clear-overlay (&optional is-accepted)
"Clear Copilot overlay.
If IS-ACCEPTED is nil, notify rejected."
(interactive)
(when (copilot--overlay-visible)
(unless is-accepted
(copilot--async-request 'notifyRejected
(list :uuids `[,(overlay-get copilot--overlay 'uuid)])))
(delete-overlay copilot--overlay)
(delete-overlay copilot--keymap-overlay)
(setq copilot--real-posn nil)))
(defun copilot-accept-completion (&optional transform-fn)
"Accept completion.
Return t if there is a completion. Use TRANSFORM-FN to transform completion if
provided."
(interactive)
(when (copilot--overlay-visible)
(let* ((completion (overlay-get copilot--overlay 'completion))
(start (overlay-get copilot--overlay 'start))
(end (copilot--overlay-end copilot--overlay))
(uuid (overlay-get copilot--overlay 'uuid))
(t-completion (funcall (or transform-fn #'identity) completion)))
(copilot--async-request 'notifyAccepted (list :uuid uuid))
(copilot-clear-overlay t)
(if (eq major-mode 'vterm-mode)
(progn
(vterm-delete-region start end)
(vterm-insert t-completion))
(delete-region start end)
(insert t-completion))
;; if it is a partial completion
(when (and (s-prefix-p t-completion completion)
(not (s-equals-p t-completion completion)))
(copilot--set-overlay-text (copilot--get-overlay) (s-chop-prefix t-completion completion)))
t)))
(defmacro copilot--define-accept-completion-by-action (func-name action)
"Define function FUNC-NAME to accept completion by ACTION."
`(defun ,func-name (&optional n)
(interactive "p")
(setq n (or n 1))
(copilot-accept-completion (lambda (completion)
(with-temp-buffer
(insert completion)
(goto-char (point-min))
(funcall ,action n)
(buffer-substring-no-properties (point-min) (point)))))))
(copilot--define-accept-completion-by-action copilot-accept-completion-by-word #'forward-word)
(copilot--define-accept-completion-by-action copilot-accept-completion-by-line #'forward-line)
(copilot--define-accept-completion-by-action copilot-accept-completion-by-paragraph #'forward-paragraph)
(defun copilot--show-completion (completion-data)
"Show COMPLETION-DATA."
(when (copilot--satisfy-display-predicates)
(copilot--dbind
(:text :uuid :docVersion doc-version
:range (:start (:line :character start-char)
:end (:character end-char)))
completion-data
(when (= doc-version copilot--doc-version)
(save-excursion
(save-restriction
(widen)
(let* ((p (point))
(goto-line! (lambda ()
(goto-char (point-min))
(forward-line (1- (+ line copilot--line-bias)))))
(start (progn
(funcall goto-line!)
(forward-char start-char)
(let* ((cur-line (buffer-substring-no-properties (point) (line-end-position)))
(common-prefix-len (length (s-shared-start text cur-line))))
(setq text (substring text common-prefix-len))
(forward-char common-prefix-len)
(point))))
(end (progn
(funcall goto-line!)
(forward-char end-char)
(point)))
(fixed-completion (copilot-balancer-fix-completion start end text)))
(goto-char p)
(pcase-let ((`(,start ,end ,balanced-text) fixed-completion))
(copilot--display-overlay-completion balanced-text uuid start end)))))))))
(defun copilot--on-doc-focus (window)
"Notify that the document WINDOW has been focussed or opened."
;; When switching windows, this function is called twice, once for the
;; window losing focus and once for the window gaining focus. We only want to
;; send a notification for the window gaining focus and only if the buffer has
;; copilot-mode enabled.
(when (and copilot-mode (eq window (selected-window)))
(if (-contains-p copilot--opened-buffers (current-buffer))
(copilot--notify ':textDocument/didFocus
(list :textDocument (list :uri (copilot--get-uri))))
(add-to-list 'copilot--opened-buffers (current-buffer))
(copilot--notify ':textDocument/didOpen
(list :textDocument (list :uri (copilot--get-uri)
:languageId (copilot--get-language-id)
:version copilot--doc-version
:text (copilot--get-source)))))))
(defun copilot--on-doc-change (&optional beg end chars-replaced)
"Notify that the document has changed.
Arguments BEG, END, and CHARS-REPLACED are metadata for region changed."
(let* ((is-before-change (null chars-replaced))
(is-after-change (not is-before-change))
;; for a deletion, the post-change beginning and end are at the same place.
(is-insertion (and is-after-change (not (equal beg end))))
(is-deletion (and is-before-change (not (equal beg end)))))
(when (or is-insertion is-deletion)
(save-restriction
(save-match-data
(widen)
(let* ((range-start (list :line (- (line-number-at-pos beg) copilot--line-bias)
:character (- beg (save-excursion (goto-char beg) (line-beginning-position)))))
(range-end (if is-insertion range-start
(list :line (- (line-number-at-pos end) copilot--line-bias)
:character (- end (save-excursion (goto-char end) (line-beginning-position))))))
(text (if is-insertion (buffer-substring-no-properties beg end) ""))
(content-changes (vector (list :range (list :start range-start :end range-end)
:text text))))
(cl-incf copilot--doc-version)
(copilot--notify 'textDocument/didChange
(list :textDocument (list :uri (copilot--get-uri) :version copilot--doc-version)
:contentChanges content-changes))))))))
(defun copilot--on-doc-close (&rest _args)
"Notify that the document has been closed."
(when (-contains-p copilot--opened-buffers (current-buffer))
(copilot--notify 'textDocument/didClose
(list :textDocument (list :uri (copilot--get-uri))))
(setq copilot--opened-buffers (delete (current-buffer) copilot--opened-buffers))))
;;;###autoload
(defun copilot-complete ()
"Complete at the current point."
(interactive)
(setq copilot--last-doc-version copilot--doc-version)
(setq copilot--completion-cache nil)
(setq copilot--completion-idx 0)
(let ((called-interactively (called-interactively-p 'interactive)))
(copilot--get-completion
(jsonrpc-lambda (&key completions &allow-other-keys)
(let ((completion (if (seq-empty-p completions) nil (seq-elt completions 0))))
(if completion
(copilot--show-completion completion)
(when called-interactively
(message "No completion is available."))))))))
;;
;; minor mode
;;
(defcustom copilot-disable-predicates nil
"A list of predicate functions with no argument to disable Copilot.
Copilot will not be triggered if any predicate returns t."
:type '(repeat function)
:group 'copilot)
(defcustom copilot-enable-predicates '(evil-insert-state-p copilot--buffer-changed)
"A list of predicate functions with no argument to enable Copilot.
Copilot will be triggered only if all predicates return t."
:type '(repeat function)
:group 'copilot)
(defcustom copilot-disable-display-predicates nil
"A list of predicate functions with no argument to disable Copilot.
Copilot will not show completions if any predicate returns t."
:type '(repeat function)
:group 'copilot)
(defcustom copilot-enable-display-predicates nil
"A list of predicate functions with no argument to enable Copilot.
Copilot will show completions only if all predicates return t."
:type '(repeat function)
:group 'copilot)
(defmacro copilot--satisfy-predicates (enable disable)
"Return t if satisfy all predicates in ENABLE and none in DISABLE."
`(and (cl-every (lambda (pred)
(if (functionp pred) (funcall pred) t))
,enable)
(cl-notany (lambda (pred)
(if (functionp pred) (funcall pred) nil))
,disable)))
(defun copilot--satisfy-trigger-predicates ()
"Return t if all trigger predicates are satisfied."
(copilot--satisfy-predicates copilot-enable-predicates copilot-disable-predicates))
(defun copilot--satisfy-display-predicates ()
"Return t if all display predicates are satisfied."
(copilot--satisfy-predicates copilot-enable-display-predicates copilot-disable-display-predicates))
(defun copilot--post-command ()
"Complete in `post-command-hook' hook."
(when (and this-command
(not (and (symbolp this-command)
(or
(s-starts-with-p "copilot-" (symbol-name this-command))
(member this-command copilot-clear-overlay-ignore-commands)
(copilot--self-insert this-command)))))
(copilot-clear-overlay)
(when copilot--post-command-timer
(cancel-timer copilot--post-command-timer))
(when (numberp copilot-idle-delay)
(setq copilot--post-command-timer
(run-with-idle-timer copilot-idle-delay
nil
#'copilot--post-command-debounce
(current-buffer))))))
(defun copilot--self-insert (command)
"Handle the case where the char just inserted is the start of the completion.
If so, update the overlays and continue. COMMAND is the command that triggered
in `post-command-hook'."
(when (and (eq command 'self-insert-command)
(copilot--overlay-visible)
(copilot--satisfy-display-predicates))
(let* ((ov copilot--overlay)
(completion (overlay-get ov 'completion)))
;; The char just inserted is the next char of completion