;;; eglot.el --- The Emacs Client for LSP servers -*- lexical-binding: t; -*- ;; Copyright (C) 2018-2024 Free Software Foundation, Inc. ;; Version: 1.17 ;; Author: João Távora ;; Maintainer: João Távora ;; URL: https://github.com/joaotavora/eglot ;; Keywords: convenience, languages ;; Package-Requires: ((emacs "26.3") (compat "27.1") (eldoc "1.14.0") (external-completion "0.1") (flymake "1.2.1") (jsonrpc "1.0.24") (project "0.9.8") (seq "2.23") (track-changes "1.2") (xref "1.6.2")) ;; This is a GNU ELPA :core package. Avoid adding functionality ;; that is not available in the version of Emacs recorded above or any ;; of the package dependencies. ;; This file is part of GNU Emacs. ;; GNU Emacs 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 3 of the License, or ;; (at your option) any later version. ;; GNU Emacs 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 . ;;; Commentary: ;; Eglot ("Emacs Polyglot") is an Emacs LSP client that stays out of ;; your way. ;; ;; Typing M-x eglot in some source file is often enough to get you ;; started, if the language server you're looking to use is installed ;; in your system. Please refer to the manual, available from ;; https://joaotavora.github.io/eglot/ or from M-x info for more usage ;; instructions. ;; ;; If you wish to contribute changes to Eglot, please do read the user ;; manual first. Additionally, take the following in consideration: ;; * Eglot's main job is to hook up the information that language ;; servers offer via LSP to Emacs's UI facilities: Xref for ;; definition-chasing, Flymake for diagnostics, Eldoc for at-point ;; documentation, etc. Eglot's job is generally *not* to provide ;; such a UI itself, though a small number of simple ;; counter-examples do exist, e.g. in the `eglot-rename' command or ;; the `eglot-inlay-hints-mode' minor mode. When a new UI is ;; evidently needed, consider adding a new package to Emacs, or ;; extending an existing one. ;; ;; * Eglot was designed to function with just the UI facilities found ;; in the latest Emacs core, as long as those facilities are also ;; available as GNU ELPA :core packages. Historically, a number of ;; :core packages were added or reworked in Emacs to make this ;; possible. This principle should be upheld when adding new LSP ;; features or tweaking existing ones. Design any new facilities in ;; a way that they could work in the absence of LSP or using some ;; different protocol, then make sure Eglot can link up LSP ;; information to it. ;; * There are few Eglot configuration variables. This principle ;; should also be upheld. If Eglot had these variables, it could be ;; duplicating configuration found elsewhere, bloating itself up, ;; and making it generally hard to integrate with the ever growing ;; set of LSP features and Emacs packages. For instance, this is ;; why one finds a single variable ;; `eglot-ignored-server-capabilities' instead of a number of ;; capability-specific flags, or why customizing the display of ;; LSP-provided documentation is done via ElDoc's variables, not ;; Eglot's. ;; ;; * Linking up LSP information to other libraries is generally done ;; in the `eglot--managed-mode' minor mode function, by ;; buffer-locally setting the other library's variables to ;; Eglot-specific versions. When deciding what to set the variable ;; to, the general idea is to choose a good default for beginners ;; that doesn't clash with Emacs's defaults. The settings are only ;; in place during Eglot's LSP-enriched tenure over a project. Even ;; so, some of those decisions will invariably aggravate a minority ;; of Emacs power users, but these users can use `eglot-stay-out-of' ;; and `eglot-managed-mode-hook' to adjust things to their ;; preferences. ;; ;; * On occasion, to enable new features, Eglot can have soft ;; dependencies on popular libraries that are not in Emacs core. ;; "Soft" means that the dependency doesn't impair any other use of ;; Eglot beyond that feature. Such is the case of the snippet ;; functionality, via the Yasnippet package, Markdown formatting of ;; at-point documentation via the markdown-mode package, and nicer ;; looking completions when the Company package is used. ;;; Code: (require 'imenu) (require 'cl-lib) (require 'url-parse) (require 'url-util) (require 'pcase) (require 'compile) ; for some faces (require 'warnings) (require 'filenotify) (require 'ert) (require 'text-property-search nil t) (require 'diff-mode) (require 'diff) (require 'track-changes) (require 'compat) ;; These dependencies are also GNU ELPA core packages. Because of ;; bug#62576, since there is a risk that M-x package-install, despite ;; having installed them, didn't correctly re-load them over the ;; built-in versions. (eval-and-compile ;; For those packages that are preloaded, reload them if needed, ;; since that's the best we can do anyway. ;; FIXME: Maybe the ELPA packages for those preloaded packages should ;; force-reload themselves eagerly when the package is activated! (let ((reload (if (fboundp 'require-with-check) ;Emacs≥30 #'require-with-check (lambda (feature &rest _) ;; Just blindly reload like we used to do before ;; `require-with-check'. (load (symbol-name feature) nil 'nomessage))))) (funcall reload 'eldoc nil 'reload) (funcall reload 'seq nil 'reload) ;; For those packages which are not preloaded OTOH, signal an error if ;; the loaded file is not the one that should have been loaded. (mapc reload '(project flymake xref jsonrpc external-completion)))) ;; Keep the eval-when-compile requires at the end, in case it's already been ;; required unconditionally by some earlier `require'. (eval-when-compile (require 'subr-x)) ;; forward-declare, but don't require (Emacs 28 doesn't seem to care) (defvar markdown-fontify-code-blocks-natively) (defvar company-backends) (defvar company-tooltip-align-annotations) (defvar tramp-ssh-controlmaster-options) (defvar tramp-use-ssh-controlmaster-options) ;;; Obsolete aliases ;;; (make-obsolete-variable 'eglot--managed-mode-hook 'eglot-managed-mode-hook "1.6") (define-obsolete-variable-alias 'eglot-confirm-server-initiated-edits 'eglot-confirm-server-edits "1.16") (make-obsolete-variable 'eglot-events-buffer-size 'eglot-events-buffer-config "1.16") (define-obsolete-function-alias 'eglot--uri-to-path #'eglot-uri-to-path "1.16") (define-obsolete-function-alias 'eglot--path-to-uri #'eglot-path-to-uri "1.16") (define-obsolete-function-alias 'eglot--range-region #'eglot-range-region "1.16") (define-obsolete-function-alias 'eglot--server-capable #'eglot-server-capable "1.16") (define-obsolete-function-alias 'eglot--server-capable-or-lose #'eglot-server-capable-or-lose "1.16") (define-obsolete-function-alias 'eglot-lsp-abiding-column #'eglot-utf-16-linepos "1.12") (define-obsolete-function-alias 'eglot-current-column #'eglot-utf-32-linepos "1.12") (define-obsolete-variable-alias 'eglot-current-column-function 'eglot-current-linepos-function "1.12") (define-obsolete-function-alias 'eglot-move-to-current-column #'eglot-move-to-utf-32-linepos "1.12") (define-obsolete-function-alias 'eglot-move-to-lsp-abiding-column #'eglot-move-to-utf-16-linepos "1.12") (define-obsolete-variable-alias 'eglot-move-to-column-function 'eglot-move-to-linepos-function "1.12") (define-obsolete-variable-alias 'eglot-ignored-server-capabilites 'eglot-ignored-server-capabilities "1.8") ;;;###autoload (define-obsolete-function-alias 'eglot-update #'eglot-upgrade-eglot "29.1") ;;; User tweakable stuff (defgroup eglot nil "Interaction with Language Server Protocol servers." :prefix "eglot-" :group 'applications) (defun eglot-alternatives (alternatives) "Compute server-choosing function for `eglot-server-programs'. Each element of ALTERNATIVES is a string PROGRAM or a list of strings (PROGRAM ARGS...) where program names an LSP server program to start with ARGS. Returns a function to be invoked automatically by Eglot on startup. When invoked, that function will return a list (ABSPATH ARGS), where ABSPATH is the absolute path of the PROGRAM that was chosen (interactively or automatically)." (lambda (&optional interactive _project) ;; JT@2021-06-13: This function is way more complicated than it ;; could be because it accounts for the fact that Compat's ;; `executable-find' may take much longer to execute on ;; remote files. (let* ((listified (cl-loop for a in alternatives collect (if (listp a) a (list a)))) (err (lambda () (error "None of '%s' are valid executables" (mapconcat #'car listified ", "))))) (cond ((and interactive current-prefix-arg) ;; A C-u always lets user input something manually, nil) (interactive (let* ((augmented (mapcar (lambda (a) (let ((found (compat-call executable-find (car a) t))) (and found (cons (car a) (cons found (cdr a)))))) listified)) (available (remove nil augmented))) (cond ((cdr available) (cdr (assoc (completing-read "[eglot] More than one server executable available: " (mapcar #'car available) nil t nil nil (car (car available))) available #'equal))) ((cdr (car available))) (t ;; Don't error when used interactively, let the ;; Eglot prompt the user for alternative (github#719) nil)))) (t (cl-loop for (p . args) in listified for probe = (compat-call executable-find p t) when probe return (cons probe args) finally (funcall err))))))) (defvar eglot-server-programs ;; FIXME: Maybe this info should be distributed into the major modes ;; themselves where they could set a buffer-local `eglot-server-program' ;; instead of keeping this database centralized. ;; FIXME: With `derived-mode-add-parents' in Emacs≥30, some of ;; those entries can be simplified, but we keep them for when ;; `eglot.el' is installed via GNU ELPA in an older Emacs. `(((rust-ts-mode rust-mode) . ("rust-analyzer")) ((cmake-mode cmake-ts-mode) . ("cmake-language-server")) (vimrc-mode . ("vim-language-server" "--stdio")) ((python-mode python-ts-mode) . ,(eglot-alternatives '("pylsp" "pyls" ("basedpyright-langserver" "--stdio") ("pyright-langserver" "--stdio") "jedi-language-server" "ruff-lsp"))) ((js-json-mode json-mode json-ts-mode jsonc-mode) . ,(eglot-alternatives '(("vscode-json-language-server" "--stdio") ("vscode-json-languageserver" "--stdio") ("json-languageserver" "--stdio")))) (((js-mode :language-id "javascript") (js-ts-mode :language-id "javascript") (tsx-ts-mode :language-id "typescriptreact") (typescript-ts-mode :language-id "typescript") (typescript-mode :language-id "typescript")) . ("typescript-language-server" "--stdio")) ((bash-ts-mode sh-mode) . ("bash-language-server" "start")) ((php-mode phps-mode php-ts-mode) . ,(eglot-alternatives '(("phpactor" "language-server") ("php" "vendor/felixfbecker/language-server/bin/php-language-server.php")))) ((c-mode c-ts-mode c++-mode c++-ts-mode objc-mode) . ,(eglot-alternatives '("clangd" "ccls"))) (((caml-mode :language-id "ocaml") (tuareg-mode :language-id "ocaml") reason-mode) . ("ocamllsp")) ((ruby-mode ruby-ts-mode) . ("solargraph" "socket" "--port" :autoport)) (haskell-mode . ("haskell-language-server-wrapper" "--lsp")) (elm-mode . ("elm-language-server")) (mint-mode . ("mint" "ls")) ((kotlin-mode kotlin-ts-mode) . ("kotlin-language-server")) ((go-mode go-dot-mod-mode go-dot-work-mode go-ts-mode go-mod-ts-mode) . ("gopls")) ((R-mode ess-r-mode) . ("R" "--slave" "-e" "languageserver::run()")) ((java-mode java-ts-mode) . ("jdtls")) ((dart-mode dart-ts-mode) . ("dart" "language-server" "--client-id" "emacs.eglot-dart")) ((elixir-mode elixir-ts-mode heex-ts-mode) . ,(if (and (fboundp 'w32-shell-dos-semantics) (w32-shell-dos-semantics)) '("language_server.bat") (eglot-alternatives '("language_server.sh" "start_lexical.sh")))) ((ada-mode ada-ts-mode) . ("ada_language_server")) ((gpr-mode gpr-ts-mode) . ("ada_language_server" "--language-gpr")) (scala-mode . ,(eglot-alternatives '("metals" "metals-emacs"))) (racket-mode . ("racket" "-l" "racket-langserver")) ((latex-mode plain-tex-mode context-mode texinfo-mode bibtex-mode tex-mode) . ,(eglot-alternatives '("digestif" "texlab"))) (erlang-mode . ("erlang_ls" "--transport" "stdio")) ((yaml-ts-mode yaml-mode) . ("yaml-language-server" "--stdio")) (nix-mode . ,(eglot-alternatives '("nil" "rnix-lsp" "nixd"))) (nickel-mode . ("nls")) ((nushell-mode nushell-ts-mode) . ("nu" "--lsp")) (gdscript-mode . ("localhost" 6008)) (fennel-mode . ("fennel-ls")) (move-mode . ("move-analyzer")) ((fortran-mode f90-mode) . ("fortls")) (futhark-mode . ("futhark" "lsp")) ((lua-mode lua-ts-mode) . ,(eglot-alternatives '("lua-language-server" "lua-lsp"))) (yang-mode . ("yang-language-server")) (zig-mode . ("zls")) ((css-mode css-ts-mode) . ,(eglot-alternatives '(("vscode-css-language-server" "--stdio") ("css-languageserver" "--stdio")))) (html-mode . ,(eglot-alternatives '(("vscode-html-language-server" "--stdio") ("html-languageserver" "--stdio")))) ((dockerfile-mode dockerfile-ts-mode) . ("docker-langserver" "--stdio")) ((clojure-mode clojurescript-mode clojurec-mode clojure-ts-mode) . ("clojure-lsp")) ((csharp-mode csharp-ts-mode) . ,(eglot-alternatives '(("omnisharp" "-lsp") ("csharp-ls")))) (purescript-mode . ("purescript-language-server" "--stdio")) ((perl-mode cperl-mode) . ("perl" "-MPerl::LanguageServer" "-e" "Perl::LanguageServer::run")) (markdown-mode . ,(eglot-alternatives '(("marksman" "server") ("vscode-markdown-language-server" "--stdio")))) (graphviz-dot-mode . ("dot-language-server" "--stdio")) (terraform-mode . ("terraform-ls" "serve")) ((uiua-ts-mode uiua-mode) . ("uiua" "lsp")) (sml-mode . ,(lambda (_interactive project) (list "millet-ls" (project-root project)))) ((blueprint-mode blueprint-ts-mode) . ("blueprint-compiler" "lsp"))) "How the command `eglot' guesses the server to start. An association list of (MAJOR-MODE . CONTACT) pairs. MAJOR-MODE identifies the buffers that are to be managed by a specific language server. The associated CONTACT specifies how to connect to a server for those buffers. MAJOR-MODE can be: * In the most common case, a symbol such as `c-mode'; * A list (MAJOR-MODE-SYMBOL :LANGUAGE-ID ID) where MAJOR-MODE-SYMBOL is the aforementioned symbol and ID is a string identifying the language to the server; * A list combining the previous two alternatives, meaning multiple major modes will be associated with a single server program. This association is such that the same resulting server process will manage buffers of different major modes. CONTACT can be: * In the most common case, a list of strings (PROGRAM [ARGS...]). PROGRAM is called with ARGS and is expected to serve LSP requests over the standard input/output channels. * A list (PROGRAM [ARGS...] :initializationOptions OPTIONS), whereupon PROGRAM is called with ARGS as in the first option, and the LSP \"initializationOptions\" JSON object is constructed from OPTIONS. If OPTIONS is a unary function, it is called with the server instance and should return a JSON object. * A list (HOST PORT [TCP-ARGS...]) where HOST is a string and PORT is a positive integer for connecting to a server via TCP. Remaining ARGS are passed to `open-network-stream' for upgrading the connection with encryption or other capabilities. * A list (PROGRAM [ARGS...] :autoport [MOREARGS...]), whereupon a combination of previous options is used. First, an attempt is made to find an available server port, then PROGRAM is launched with ARGS; the `:autoport' keyword substituted for that number; and MOREARGS. Eglot then attempts to establish a TCP connection to that port number on the localhost. * A cons (CLASS-NAME . INITARGS) where CLASS-NAME is a symbol designating a subclass of `eglot-lsp-server', for representing experimental LSP servers. INITARGS is a keyword-value plist used to initialize the object of CLASS-NAME, or a plain list interpreted as the previous descriptions of CONTACT. In the latter case that plain list is used to produce a plist with a suitable :PROCESS initarg to CLASS-NAME. The class `eglot-lsp-server' descends from `jsonrpc-process-connection', which you should see for the semantics of the mandatory :PROCESS argument. * A function of two arguments (INTERACTIVE PROJECT) producing any of the above values for CONTACT. INTERACTIVE will be t if an interactive `M-x eglot' was used, and nil otherwise (e.g. from `eglot-ensure'). Interactive calls may ask the user for hints on finding the required programs, etc. PROJECT is whatever project Eglot discovered via `project-find-functions' (which see). The function should return nil or signal an error if it can't produce a valid CONTACT. The helper function `eglot-alternatives' (which see) can be used to produce a function that offers more than one server for a given MAJOR-MODE.") (defface eglot-highlight-symbol-face '((t (:inherit bold))) "Face used to highlight the symbol at point.") (defface eglot-mode-line '((t (:inherit font-lock-constant-face :weight bold))) "Face for package-name in Eglot's mode line.") (defface eglot-diagnostic-tag-unnecessary-face '((t (:inherit shadow))) "Face used to render unused or unnecessary code.") (defface eglot-diagnostic-tag-deprecated-face '((t . (:inherit shadow :strike-through t))) "Face used to render deprecated or obsolete code.") (defcustom eglot-autoreconnect 3 "Control ability to reconnect automatically to the LSP server. If t, always reconnect automatically (not recommended). If nil, never reconnect automatically after unexpected server shutdowns, crashes or network failures. A positive integer number says to only autoreconnect if the previous successful connection attempt lasted more than that many seconds." :type '(choice (const :tag "Reconnect automatically" t) (const :tag "Never reconnect" nil) (integer :tag "Number of seconds"))) (defcustom eglot-connect-timeout 30 "Number of seconds before timing out LSP connection attempts. If nil, never time out." :type '(choice (number :tag "Number of seconds") (const :tag "Never time out" nil))) (defcustom eglot-sync-connect 3 "Control blocking of LSP connection attempts. If t, block for `eglot-connect-timeout' seconds. A positive integer number means block for that many seconds, and then wait for the connection in the background. nil has the same meaning as 0, i.e. don't block at all." :type '(choice (const :tag "Block for `eglot-connect-timeout' seconds" t) (const :tag "Never block" nil) (integer :tag "Number of seconds to block"))) (defcustom eglot-autoshutdown nil "If non-nil, shut down server after killing last managed buffer." :type 'boolean) (defcustom eglot-send-changes-idle-time 0.5 "Don't tell server of changes before Emacs's been idle for this many seconds." :type 'number) (defcustom eglot-events-buffer-config (list :size (or (bound-and-true-p eglot-events-buffer-size) 2000000) :format 'full) "Configure the Eglot events buffer. Value is a plist accepting the keys `:size', which controls the size in characters of the buffer (0 disables, nil means infinite), and `:format', which controls the shape of each log entry (`full' includes the original JSON, `lisp' uses pretty-printed Lisp). For changes on this variable to take effect, you need to restart the LSP connection. That can be done by `eglot-reconnect'." :type '(plist :key-type (symbol :tag "Keyword") :options (((const :tag "Size" :size) (choice (const :tag "No limit" nil) (integer :tag "Number of characters"))) ((const :tag "Format" :format) (choice (const :tag "Full with original JSON" full) (const :tag "Shortened" short) (const :tag "Pretty-printed lisp" lisp)))))) (defcustom eglot-confirm-server-edits '((eglot-rename . nil) (t . maybe-summary)) "Control if changes proposed by LSP should be confirmed with user. If this variable's value is the symbol `diff', a diff buffer is pops up, allowing the user to apply each change individually. If the symbol `summary' or any other non-nil value, the user is prompted in the minibuffer with aa short summary of changes. The symbols `maybe-diff' and `maybe-summary' mean that the confirmation is offered to the user only if the changes target files visited in buffers. Finally, a nil value means all changes are applied directly without any confirmation. If this variable's value can also be an alist ((COMMAND . ACTION) ...) where COMMAND is a symbol designating a command, such as `eglot-rename', `eglot-code-actions', `eglot-code-action-quickfix', etc. ACTION is one of the symbols described above. The value t for COMMAND is accepted and its ACTION is the default value for commands not in the alist." :type (let ((basic-choices '((const :tag "Use diff" diff) (const :tag "Summarize and prompt" summary) (const :tag "Maybe use diff" maybe-diff) (const :tag "Maybe summarize and prompt" maybe-summary) (const :tag "Don't confirm" nil)))) `(choice ,@basic-choices (alist :tag "Per-command alist" :key-type (choice (function :tag "Command") (const :tag "Default" t)) :value-type (choice . ,basic-choices))))) (defcustom eglot-extend-to-xref nil "If non-nil, activate Eglot in cross-referenced non-project files." :type 'boolean) (defcustom eglot-prefer-plaintext nil "If non-nil, always request plaintext responses to hover requests." :type 'boolean) (defcustom eglot-menu-string "eglot" "String displayed in mode line when Eglot is active." :type 'string) (defcustom eglot-report-progress t "If non-nil, show progress of long running LSP server work. If set to `messages', use *Messages* buffer, else use Eglot's mode line indicator. For changes on this variable to take effect, you need to restart the LSP connection. That can be done by `eglot-reconnect'." :type '(choice (const :tag "Don't show progress" nil) (const :tag "Show progress in *Messages*" messages) (const :tag "Show progress in Eglot's mode line indicator" t)) :version "1.10") (defcustom eglot-ignored-server-capabilities (list) "LSP server capabilities that Eglot could use, but won't. You could add, for instance, the symbol `:documentHighlightProvider' to prevent automatic highlighting under cursor." :type '(set :tag "Tick the ones you're not interested in" (const :tag "Documentation on hover" :hoverProvider) (const :tag "Code completion" :completionProvider) (const :tag "Function signature help" :signatureHelpProvider) (const :tag "Go to definition" :definitionProvider) (const :tag "Go to type definition" :typeDefinitionProvider) (const :tag "Go to implementation" :implementationProvider) (const :tag "Go to declaration" :declarationProvider) (const :tag "Find references" :referencesProvider) (const :tag "Highlight symbols automatically" :documentHighlightProvider) (const :tag "List symbols in buffer" :documentSymbolProvider) (const :tag "List symbols in workspace" :workspaceSymbolProvider) (const :tag "Execute code actions" :codeActionProvider) (const :tag "Code lens" :codeLensProvider) (const :tag "Format buffer" :documentFormattingProvider) (const :tag "Format portion of buffer" :documentRangeFormattingProvider) (const :tag "On-type formatting" :documentOnTypeFormattingProvider) (const :tag "Rename symbol" :renameProvider) (const :tag "Highlight links in document" :documentLinkProvider) (const :tag "Decorate color references" :colorProvider) (const :tag "Fold regions of buffer" :foldingRangeProvider) (const :tag "Execute custom commands" :executeCommandProvider) (const :tag "Inlay hints" :inlayHintProvider))) (defvar eglot-withhold-process-id nil "If non-nil, Eglot will not send the Emacs process id to the language server. This can be useful when using docker to run a language server.") ;;; Constants ;;; (defconst eglot--symbol-kind-names `((1 . "File") (2 . "Module") (3 . "Namespace") (4 . "Package") (5 . "Class") (6 . "Method") (7 . "Property") (8 . "Field") (9 . "Constructor") (10 . "Enum") (11 . "Interface") (12 . "Function") (13 . "Variable") (14 . "Constant") (15 . "String") (16 . "Number") (17 . "Boolean") (18 . "Array") (19 . "Object") (20 . "Key") (21 . "Null") (22 . "EnumMember") (23 . "Struct") (24 . "Event") (25 . "Operator") (26 . "TypeParameter"))) (defconst eglot--kind-names `((1 . "Text") (2 . "Method") (3 . "Function") (4 . "Constructor") (5 . "Field") (6 . "Variable") (7 . "Class") (8 . "Interface") (9 . "Module") (10 . "Property") (11 . "Unit") (12 . "Value") (13 . "Enum") (14 . "Keyword") (15 . "Snippet") (16 . "Color") (17 . "File") (18 . "Reference") (19 . "Folder") (20 . "EnumMember") (21 . "Constant") (22 . "Struct") (23 . "Event") (24 . "Operator") (25 . "TypeParameter"))) (defconst eglot--tag-faces `((1 . eglot-diagnostic-tag-unnecessary-face) (2 . eglot-diagnostic-tag-deprecated-face))) (defvaralias 'eglot-{} 'eglot--{}) (defconst eglot--{} (make-hash-table :size 0) "The empty JSON object.") (defun eglot--accepted-formats () (if (and (not eglot-prefer-plaintext) (fboundp 'gfm-view-mode)) ["markdown" "plaintext"] ["plaintext"])) (defconst eglot--uri-path-allowed-chars (let ((vec (copy-sequence url-path-allowed-chars))) (aset vec ?: nil) ;; see github#639 vec) "Like `url-path-allowed-chars' but more restrictive.") ;;; Message verification helpers ;;; (eval-and-compile (defvar eglot--lsp-interface-alist `( (CodeAction (:title) (:kind :diagnostics :edit :command :isPreferred :data)) (ConfigurationItem () (:scopeUri :section)) (Command ((:title . string) (:command . string)) (:arguments)) (CompletionItem (:label) (:kind :detail :documentation :deprecated :preselect :sortText :filterText :insertText :insertTextFormat :textEdit :additionalTextEdits :commitCharacters :command :data :tags)) (Diagnostic (:range :message) (:severity :code :source :relatedInformation :codeDescription :tags)) (DocumentHighlight (:range) (:kind)) (ExecuteCommandParams ((:command . string)) (:arguments)) (FileSystemWatcher (:globPattern) (:kind)) (Hover (:contents) (:range)) (InitializeResult (:capabilities) (:serverInfo)) (Location (:uri :range)) (LocationLink (:targetUri :targetRange :targetSelectionRange) (:originSelectionRange)) (LogMessageParams (:type :message)) (MarkupContent (:kind :value)) (ParameterInformation (:label) (:documentation)) (Position (:line :character)) (Range (:start :end)) (Registration (:id :method) (:registerOptions)) (ResponseError (:code :message) (:data)) (ShowMessageParams (:type :message)) (ShowMessageRequestParams (:type :message) (:actions)) (SignatureHelp (:signatures) (:activeSignature :activeParameter)) (SignatureInformation (:label) (:documentation :parameters :activeParameter)) (SymbolInformation (:name :kind :location) (:deprecated :containerName)) (DocumentSymbol (:name :range :selectionRange :kind) (:detail :deprecated :children)) (TextDocumentEdit (:textDocument :edits) ()) (TextEdit (:range :newText)) (VersionedTextDocumentIdentifier (:uri :version) ()) (WorkDoneProgress (:kind) (:title :message :percentage :cancellable)) (WorkspaceEdit () (:changes :documentChanges)) (WorkspaceSymbol (:name :kind) (:containerName :location :data)) (InlayHint (:position :label) (:kind :textEdits :tooltip :paddingLeft :paddingRight :data)) (InlayHintLabelPart (:value) (:tooltip :location :command))) "Alist (INTERFACE-NAME . INTERFACE) of known external LSP interfaces. INTERFACE-NAME is a symbol designated by the spec as \"interface\". INTERFACE is a list (REQUIRED OPTIONAL) where REQUIRED and OPTIONAL are lists of KEYWORD designating field names that must be, or may be, respectively, present in a message adhering to that interface. KEY can be a keyword or a cons (SYM TYPE), where type is used by `cl-typep' to check types at runtime. Here's what an element of this alist might look like: (Command ((:title . string) (:command . string)) (:arguments))")) (eval-and-compile (defvar eglot-strict-mode '(;; Uncomment next lines for fun and debugging ;; disallow-non-standard-keys ;; enforce-required-keys ;; enforce-optional-keys no-unknown-interfaces) "How strictly to check LSP interfaces at compile- and run-time. Value is a list of symbols (if the list is empty, no checks are performed). If the symbol `disallow-non-standard-keys' is present, an error is raised if any extraneous fields are sent by the server. At compile-time, a warning is raised if a destructuring spec includes such a field. If the symbol `enforce-required-keys' is present, an error is raised if any required fields are missing from the message sent from the server. At compile-time, a warning is raised if a destructuring spec doesn't use such a field. If the symbol `enforce-optional-keys' is present, nothing special happens at run-time. At compile-time, a warning is raised if a destructuring spec doesn't use all optional fields. If the symbol `disallow-unknown-methods' is present, Eglot warns on unknown notifications and errors on unknown requests. If the symbol `no-unknown-interfaces' is present, Eglot warns at compile time if an undeclared LSP interface is used.")) (cl-defun eglot--check-object (interface-name object &optional (enforce-required t) (disallow-non-standard t) (check-types t)) "Check that OBJECT conforms to INTERFACE. Error otherwise." (cl-destructuring-bind (&key types required-keys optional-keys &allow-other-keys) (eglot--interface interface-name) (when-let ((missing (and enforce-required (cl-set-difference required-keys (eglot--plist-keys object))))) (eglot--error "A `%s' must have %s" interface-name missing)) (when-let ((excess (and disallow-non-standard (cl-set-difference (eglot--plist-keys object) (append required-keys optional-keys))))) (eglot--error "A `%s' mustn't have %s" interface-name excess)) (when check-types (cl-loop for (k v) on object by #'cddr for type = (or (cdr (assoc k types)) t) ;; FIXME: enforce nil type? unless (cl-typep v type) do (eglot--error "A `%s' must have a %s as %s, but has %s" interface-name))) t)) (eval-and-compile (defun eglot--keywordize-vars (vars) (mapcar (lambda (var) (intern (format ":%s" var))) vars)) (defun eglot--ensure-type (k) (if (consp k) k (cons k t))) (defun eglot--interface (interface-name) (let* ((interface (assoc interface-name eglot--lsp-interface-alist)) (required (mapcar #'eglot--ensure-type (car (cdr interface)))) (optional (mapcar #'eglot--ensure-type (cadr (cdr interface))))) (list :types (append required optional) :required-keys (mapcar #'car required) :optional-keys (mapcar #'car optional)))) (defun eglot--check-dspec (interface-name dspec) "Check destructuring spec DSPEC against INTERFACE-NAME." (cl-destructuring-bind (&key required-keys optional-keys &allow-other-keys) (eglot--interface interface-name) (cond ((or required-keys optional-keys) (let ((too-many (and (memq 'disallow-non-standard-keys eglot-strict-mode) (cl-set-difference (eglot--keywordize-vars dspec) (append required-keys optional-keys)))) (ignored-required (and (memq 'enforce-required-keys eglot-strict-mode) (cl-set-difference required-keys (eglot--keywordize-vars dspec)))) (missing-out (and (memq 'enforce-optional-keys eglot-strict-mode) (cl-set-difference optional-keys (eglot--keywordize-vars dspec))))) (when too-many (byte-compile-warn "Destructuring for %s has extraneous %s" interface-name too-many)) (when ignored-required (byte-compile-warn "Destructuring for %s ignores required %s" interface-name ignored-required)) (when missing-out (byte-compile-warn "Destructuring for %s is missing out on %s" interface-name missing-out)))) ((memq 'no-unknown-interfaces eglot-strict-mode) (byte-compile-warn "Unknown LSP interface %s" interface-name)))))) (cl-defmacro eglot--dbind (vars object &body body) "Destructure OBJECT, binding VARS in BODY. VARS is ([(INTERFACE)] SYMS...) Honor `eglot-strict-mode'." (declare (indent 2) (debug (sexp sexp &rest form))) (let ((interface-name (if (consp (car vars)) (car (pop vars)))) (object-once (make-symbol "object-once")) (fn-once (make-symbol "fn-once"))) (cond (interface-name (eglot--check-dspec interface-name vars) `(let ((,object-once ,object)) (cl-destructuring-bind (&key ,@vars &allow-other-keys) ,object-once (eglot--check-object ',interface-name ,object-once (memq 'enforce-required-keys eglot-strict-mode) (memq 'disallow-non-standard-keys eglot-strict-mode) (memq 'check-types eglot-strict-mode)) ,@body))) (t `(let ((,object-once ,object) (,fn-once (lambda (,@vars) ,@body))) (if (memq 'disallow-non-standard-keys eglot-strict-mode) (cl-destructuring-bind (&key ,@vars) ,object-once (funcall ,fn-once ,@vars)) (cl-destructuring-bind (&key ,@vars &allow-other-keys) ,object-once (funcall ,fn-once ,@vars)))))))) (cl-defmacro eglot--lambda (cl-lambda-list &body body) "Function of args CL-LAMBDA-LIST for processing INTERFACE objects. Honor `eglot-strict-mode'." (declare (indent 1) (debug (sexp &rest form))) (let ((e (cl-gensym "jsonrpc-lambda-elem"))) `(lambda (,e) (cl-block nil (eglot--dbind ,cl-lambda-list ,e ,@body))))) (cl-defmacro eglot--dcase (obj &rest clauses) "Like `pcase', but for the LSP object OBJ. CLAUSES is a list (DESTRUCTURE FORMS...) where DESTRUCTURE is treated as in `eglot--dbind'." (declare (indent 1) (debug (sexp &rest (sexp &rest form)))) (let ((obj-once (make-symbol "obj-once"))) `(let ((,obj-once ,obj)) (cond ,@(cl-loop for (vars . body) in clauses for vars-as-keywords = (eglot--keywordize-vars vars) for interface-name = (if (consp (car vars)) (car (pop vars))) for condition = (cond (interface-name (eglot--check-dspec interface-name vars) ;; In this mode, in runtime, we assume ;; `eglot-strict-mode' is partially on, otherwise we ;; can't disambiguate between certain types. `(ignore-errors (eglot--check-object ',interface-name ,obj-once t (memq 'disallow-non-standard-keys eglot-strict-mode) t))) (t ;; In this interface-less mode we don't check ;; `eglot-strict-mode' at all: just check that the object ;; has all the keys the user wants to destructure. `(null (cl-set-difference ',vars-as-keywords (eglot--plist-keys ,obj-once))))) collect `(,condition (cl-destructuring-bind (&key ,@vars &allow-other-keys) ,obj-once ,@body))) (t (eglot--error "%S didn't match any of %S" ,obj-once ',(mapcar #'car clauses))))))) (cl-defmacro eglot--when-live-buffer (buf &rest body) "Check BUF live, then do BODY in it." (declare (indent 1) (debug t)) (let ((b (cl-gensym))) `(let ((,b ,buf)) (if (buffer-live-p ,b) (with-current-buffer ,b ,@body))))) (cl-defmacro eglot--when-buffer-window (buf &body body) "Check BUF showing somewhere, then do BODY in it." (declare (indent 1) (debug t)) (let ((b (cl-gensym))) `(let ((,b ,buf)) ;;notice the exception when testing with `ert' (when (or (get-buffer-window ,b) (ert-running-test)) (with-current-buffer ,b ,@body))))) (cl-defmacro eglot--widening (&rest body) "Save excursion and restriction. Widen. Then run BODY." (declare (debug t)) `(save-excursion (save-restriction (widen) ,@body))) ;;; Public Elisp API ;;; (cl-defgeneric eglot-handle-request (server method &rest params) "Handle SERVER's METHOD request with PARAMS.") (cl-defgeneric eglot-handle-notification (server method &rest params) "Handle SERVER's METHOD notification with PARAMS.") (cl-defgeneric eglot-execute-command (_ _ _) (declare (obsolete eglot-execute "30.1")) (:method (server command arguments) (eglot--request server :workspace/executeCommand `(:command ,(format "%s" command) :arguments ,arguments)))) (cl-defgeneric eglot-execute (server action) "Ask SERVER to execute ACTION. ACTION is an LSP `CodeAction', `Command' or `ExecuteCommandParams' object." (:method (server action) "Default implementation." (eglot--dcase action (((Command)) ;; Convert to ExecuteCommandParams and recurse (bug#71642) (cl-remf action :title) (eglot-execute server action)) (((ExecuteCommandParams)) (eglot--request server :workspace/executeCommand action)) (((CodeAction) edit command data) (if (and (null edit) (null command) data (eglot-server-capable :codeActionProvider :resolveProvider)) (eglot-execute server (eglot--request server :codeAction/resolve action)) (when edit (eglot--apply-workspace-edit edit this-command)) (when command ;; Recursive call with what must be a Command object (bug#71642) (eglot-execute server command))))))) (cl-defgeneric eglot-initialization-options (server) "JSON object to send under `initializationOptions'." (:method (s) (let ((probe (plist-get (eglot--saved-initargs s) :initializationOptions))) (cond ((functionp probe) (funcall probe s)) (probe) (t eglot--{}))))) (cl-defgeneric eglot-register-capability (server method id &rest params) "Ask SERVER to register capability METHOD marked with ID." (:method (_s method _id &rest _params) (eglot--warn "Server tried to register unsupported capability `%s'" method))) (cl-defgeneric eglot-unregister-capability (server method id &rest params) "Ask SERVER to register capability METHOD marked with ID." (:method (_s method _id &rest _params) (eglot--warn "Server tried to unregister unsupported capability `%s'" method))) (cl-defgeneric eglot-client-capabilities (server) "What the Eglot LSP client supports for SERVER." (:method (s) (list :workspace (list :applyEdit t :executeCommand `(:dynamicRegistration :json-false) :workspaceEdit `(:documentChanges t) :didChangeWatchedFiles `(:dynamicRegistration ,(if (eglot--trampish-p s) :json-false t)) :symbol `(:dynamicRegistration :json-false) :configuration t :workspaceFolders t) :textDocument (list :synchronization (list :dynamicRegistration :json-false :willSave t :willSaveWaitUntil t :didSave t) :completion (list :dynamicRegistration :json-false :completionItem `(:snippetSupport ,(if (and (not (eglot--stay-out-of-p 'yasnippet)) (eglot--snippet-expansion-fn)) t :json-false) :deprecatedSupport t :resolveSupport (:properties ["documentation" "details" "additionalTextEdits"]) :tagSupport (:valueSet [1])) :contextSupport t) :hover (list :dynamicRegistration :json-false :contentFormat (eglot--accepted-formats)) :signatureHelp (list :dynamicRegistration :json-false :signatureInformation `(:parameterInformation (:labelOffsetSupport t) :documentationFormat ,(eglot--accepted-formats) :activeParameterSupport t)) :references `(:dynamicRegistration :json-false) :definition (list :dynamicRegistration :json-false :linkSupport t) :declaration (list :dynamicRegistration :json-false :linkSupport t) :implementation (list :dynamicRegistration :json-false :linkSupport t) :typeDefinition (list :dynamicRegistration :json-false :linkSupport t) :documentSymbol (list :dynamicRegistration :json-false :hierarchicalDocumentSymbolSupport t :symbolKind `(:valueSet [,@(mapcar #'car eglot--symbol-kind-names)])) :documentHighlight `(:dynamicRegistration :json-false) :codeAction (list :dynamicRegistration :json-false :resolveSupport `(:properties ["edit" "command"]) :dataSupport t :codeActionLiteralSupport '(:codeActionKind (:valueSet ["quickfix" "refactor" "refactor.extract" "refactor.inline" "refactor.rewrite" "source" "source.organizeImports"])) :isPreferredSupport t) :formatting `(:dynamicRegistration :json-false) :rangeFormatting `(:dynamicRegistration :json-false) :rename `(:dynamicRegistration :json-false) :inlayHint `(:dynamicRegistration :json-false) :publishDiagnostics (list :relatedInformation :json-false ;; TODO: We can support :codeDescription after ;; adding an appropriate UI to ;; Flymake. :codeDescriptionSupport :json-false :tagSupport `(:valueSet [,@(mapcar #'car eglot--tag-faces)]))) :window `(:showDocument (:support t) :workDoneProgress ,(if eglot-report-progress t :json-false)) :general (list :positionEncodings ["utf-32" "utf-8" "utf-16"]) :experimental eglot--{}))) (cl-defgeneric eglot-workspace-folders (server) "Return workspaceFolders for SERVER." (let ((project (eglot--project server))) (vconcat (mapcar (lambda (dir) (list :uri (eglot-path-to-uri dir) :name (abbreviate-file-name dir))) `(,(project-root project) ,@(project-external-roots project)))))) (defclass eglot-lsp-server (jsonrpc-process-connection) ((project-nickname :documentation "Short nickname for the associated project." :accessor eglot--project-nickname :reader eglot-project-nickname) (languages :initform nil :documentation "Alist ((MODE . LANGUAGE-ID-STRING)...) of managed languages." :accessor eglot--languages) (capabilities :initform nil :documentation "JSON object containing server capabilities." :accessor eglot--capabilities) (server-info :initform nil :documentation "JSON object containing server info." :accessor eglot--server-info) (shutdown-requested :initform nil :documentation "Flag set when server is shutting down." :accessor eglot--shutdown-requested) (project :initform nil :documentation "Project associated with server." :accessor eglot--project) (progress-reporters :initform (make-hash-table :test #'equal) :accessor eglot--progress-reporters :documentation "Maps LSP progress tokens to progress reporters.") (inhibit-autoreconnect :initform t :documentation "Generalized boolean inhibiting auto-reconnection if true." :accessor eglot--inhibit-autoreconnect) (file-watches :documentation "Map (DIR -> (WATCH ID1 ID2...)) for `didChangeWatchedFiles'." :initform (make-hash-table :test #'equal) :accessor eglot--file-watches) (managed-buffers :initform nil :documentation "List of buffers managed by server." :accessor eglot--managed-buffers) (saved-initargs :documentation "Saved initargs for reconnection purposes." :accessor eglot--saved-initargs)) :documentation "Represents a server. Wraps a process for LSP communication.") (declare-function w32-long-file-name "w32proc.c" (fn)) (defun eglot-uri-to-path (uri) "Convert URI to file path, helped by `eglot-current-server'." (when (keywordp uri) (setq uri (substring (symbol-name uri) 1))) (let* ((server (eglot-current-server)) (remote-prefix (and server (eglot--trampish-p server))) (url (url-generic-parse-url uri))) ;; Only parse file:// URIs, leave other URI untouched as ;; `file-name-handler-alist' should know how to handle them ;; (bug#58790). (if (string= "file" (url-type url)) (let* ((retval (url-unhex-string (url-filename url))) ;; Remove the leading "/" for local MS Windows-style paths. (normalized (if (and (not remote-prefix) (eq system-type 'windows-nt) (cl-plusp (length retval))) (w32-long-file-name (substring retval 1)) retval))) (concat remote-prefix normalized)) uri))) (cl-defun eglot-path-to-uri (path &key truenamep) "Convert PATH, a file name, to LSP URI string and return it. TRUENAMEP indicated PATH is already a truename." ;; LSP servers should not be expected to access the filesystem, and ;; therefore are generally oblivious that some filenames are ;; different, but point to the same file, like a symlink and its ;; target. Make sure we hand the server the true name of a file by ;; calling file-truename. (let ((truepath (if truenamep path (file-truename path)))) (if (and (url-type (url-generic-parse-url path)) ;; PATH might be MS Windows file name which includes a ;; drive letter that looks like a URL scheme (bug#59338). (not (and (eq system-type 'windows-nt) (file-name-absolute-p truepath)))) ;; PATH is already a URI, so forward it to the LSP server ;; untouched. The server should be able to handle it, since ;; it provided this URI to clients in the first place. path (concat "file://" ;; Add a leading "/" for local MS Windows-style paths. (if (and (eq system-type 'windows-nt) (not (file-remote-p truepath))) "/") (url-hexify-string ;; Again watch out for trampy paths. (directory-file-name (file-local-name truepath)) eglot--uri-path-allowed-chars))))) (defun eglot-range-region (range &optional markers) "Return a cons (BEG . END) of positions representing LSP RANGE. If optional MARKERS, make markers instead." (let* ((st (plist-get range :start)) (beg (eglot--lsp-position-to-point st markers)) (end (eglot--lsp-position-to-point (plist-get range :end) markers))) (cons beg end))) (defun eglot-server-capable (&rest feats) "Determine if current server is capable of FEATS." (unless (cl-some (lambda (feat) (memq feat eglot-ignored-server-capabilities)) feats) (cl-loop for caps = (eglot--capabilities (eglot--current-server-or-lose)) then (cadr probe) for (feat . more) on feats for probe = (plist-member caps feat) if (not probe) do (cl-return nil) if (eq (cadr probe) :json-false) do (cl-return nil) if (not (listp (cadr probe))) do (cl-return (if more nil (cadr probe))) finally (cl-return (or (cadr probe) t))))) (defun eglot-server-capable-or-lose (&rest feats) "Like `eglot-server-capable', but maybe error out." (let ((retval (apply #'eglot-server-capable feats))) (unless retval (eglot--error "Unsupported or ignored LSP capability `%s'" (mapconcat #'symbol-name feats " "))) retval)) ;;; Process/server management (defun eglot--major-modes (s) "Major modes server S is responsible for." (mapcar #'car (eglot--languages s))) (defun eglot--language-ids (s) "LSP Language ID strings for server S's modes." (mapcar #'cdr (eglot--languages s))) (cl-defmethod initialize-instance :before ((_server eglot-lsp-server) &optional args) (cl-remf args :initializationOptions)) (defvar eglot--servers-by-project (make-hash-table :test #'equal) "Keys are projects. Values are lists of processes.") (defun eglot-shutdown (server &optional _interactive timeout preserve-buffers) "Politely ask SERVER to quit. Interactively, read SERVER from the minibuffer unless there is only one and it's managing the current buffer. Forcefully quit it if it doesn't respond within TIMEOUT seconds. TIMEOUT defaults to 1.5 seconds. Don't leave this function with the server still running. If PRESERVE-BUFFERS is non-nil (interactively, when called with a prefix argument), do not kill events and output buffers of SERVER." (interactive (list (eglot--read-server "Shutdown which server" (eglot-current-server)) t nil current-prefix-arg)) (eglot--message "Asking %s politely to terminate" (jsonrpc-name server)) (unwind-protect (progn (setf (eglot--shutdown-requested server) t) (eglot--request server :shutdown nil :timeout (or timeout 1.5)) (jsonrpc-notify server :exit nil)) ;; Now ask jsonrpc.el to shut down the server. (jsonrpc-shutdown server (not preserve-buffers)) (unless preserve-buffers (kill-buffer (jsonrpc-events-buffer server))))) (defun eglot-shutdown-all (&optional preserve-buffers) "Politely ask all language servers to quit, in order. PRESERVE-BUFFERS as in `eglot-shutdown', which see." (interactive (list current-prefix-arg)) (cl-loop for ss being the hash-values of eglot--servers-by-project do (with-demoted-errors "[eglot] shutdown all: %s" (cl-loop for s in ss do (eglot-shutdown s nil nil preserve-buffers))))) (defvar eglot--servers-by-xrefed-file (make-hash-table :test 'equal)) (defun eglot--on-shutdown (server) "Called by jsonrpc.el when SERVER is already dead." ;; Turn off `eglot--managed-mode' where appropriate. (dolist (buffer (eglot--managed-buffers server)) (let (;; Avoid duplicate shutdowns (github#389) (eglot-autoshutdown nil)) (eglot--when-live-buffer buffer (eglot--managed-mode-off)))) ;; Kill any expensive watches (maphash (lambda (_dir watch-and-ids) (file-notify-rm-watch (car watch-and-ids))) (eglot--file-watches server)) ;; Sever the project/server relationship for `server' (setf (gethash (eglot--project server) eglot--servers-by-project) (delq server (gethash (eglot--project server) eglot--servers-by-project))) (maphash (lambda (f s) (when (eq s server) (remhash f eglot--servers-by-xrefed-file))) eglot--servers-by-xrefed-file) (cond ((eglot--shutdown-requested server) t) ((not (eglot--inhibit-autoreconnect server)) (eglot--warn "Reconnecting after unexpected server exit.") (eglot-reconnect server)) ((timerp (eglot--inhibit-autoreconnect server)) (eglot--warn "Not auto-reconnecting, last one didn't last long.")))) (defun eglot--all-major-modes () "Return all known major modes." (let ((retval)) (mapatoms (lambda (sym) (when (plist-member (symbol-plist sym) 'derived-mode-parent) (push sym retval)))) retval)) (defvar eglot-command-history nil "History of CONTACT arguments to `eglot'.") (defun eglot--lookup-mode (mode) "Lookup `eglot-server-programs' for MODE. Return (LANGUAGES . CONTACT-PROXY). MANAGED-MODES is a list with MODE as its first element. Subsequent elements are other major modes also potentially managed by the server that is to manage MODE. LANGUAGE-IDS is a list of the same length as MANAGED-MODES. Each elem is derived from the corresponding mode name, if not specified in `eglot-server-programs' (which see). CONTACT-PROXY is the value of the corresponding `eglot-server-programs' entry." (cl-flet ((languages (main-mode-sym specs) (let* ((res (mapcar (jsonrpc-lambda (sym &key language-id &allow-other-keys) (cons sym (or language-id (or (get sym 'eglot-language-id) (replace-regexp-in-string "\\(?:-ts\\)?-mode$" "" (symbol-name sym)))))) specs)) (head (cl-find main-mode-sym res :key #'car))) (cons head (delq head res))))) (cl-loop for (modes . contact) in eglot-server-programs for specs = (mapcar #'eglot--ensure-list (if (or (symbolp modes) (keywordp (cadr modes))) (list modes) modes)) thereis (cl-some (lambda (spec) (cl-destructuring-bind (sym &key &allow-other-keys) spec (and (provided-mode-derived-p mode sym) (cons (languages sym specs) contact)))) specs)))) (defun eglot--guess-contact (&optional interactive) "Helper for `eglot'. Return (MANAGED-MODES PROJECT CLASS CONTACT LANG-IDS). If INTERACTIVE is non-nil, maybe prompt user, else error as soon as something can't be guessed." (let* ((project (eglot--current-project)) (guessed-mode (if buffer-file-name major-mode)) (guessed-mode-name (and guessed-mode (symbol-name guessed-mode))) (main-mode (cond ((and interactive (or (>= (prefix-numeric-value current-prefix-arg) 16) (not guessed-mode))) (intern (completing-read "[eglot] Start a server to manage buffers of what major mode? " (mapcar #'symbol-name (eglot--all-major-modes)) nil t guessed-mode-name nil guessed-mode-name nil))) ((not guessed-mode) (eglot--error "Can't guess mode to manage for `%s'" (current-buffer))) (t guessed-mode))) (languages-and-contact (eglot--lookup-mode main-mode)) (managed-modes (mapcar #'car (car languages-and-contact))) (language-ids (mapcar #'cdr (car languages-and-contact))) (guess (cdr languages-and-contact)) (guess (if (functionp guess) (pcase (cdr (func-arity guess)) (1 (funcall guess interactive)) (_ (funcall guess interactive project))) guess)) (class (or (and (consp guess) (symbolp (car guess)) (prog1 (unless current-prefix-arg (car guess)) (setq guess (cdr guess)))) 'eglot-lsp-server)) (program (and (listp guess) (stringp (car guess)) ;; A second element might be the port of a (host, port) ;; pair, but in that case it is not a string. (or (null (cdr guess)) (stringp (cadr guess))) (car guess))) (base-prompt (and interactive "Enter program to execute (or :): ")) (full-program-invocation (and program (cl-every #'stringp guess) (combine-and-quote-strings guess))) (prompt (and base-prompt (cond (current-prefix-arg base-prompt) ((null guess) (format "[eglot] Couldn't guess LSP server for `%s'\n%s" main-mode base-prompt)) ((and program (not (file-name-absolute-p program)) (not (compat-call executable-find program t))) (if full-program-invocation (concat (format "[eglot] I guess you want to run `%s'" full-program-invocation) (format ", but I can't find `%s' in PATH!" program) "\n" base-prompt) (eglot--error (concat "`%s' not found in PATH, but can't form" " an interactive prompt for help you fix" " this.") program guess)))))) (input (and prompt (read-shell-command prompt full-program-invocation 'eglot-command-history))) (contact (if input (if (string-match "^[\s\t]*\\(.*\\):\\([[:digit:]]+\\)[\s\t]*$" input) ;; : special case (bug#67682) (list (match-string 1 input) (string-to-number (match-string 2 input))) (split-string-and-unquote input)) guess))) (list managed-modes project class contact language-ids))) (defvar eglot-lsp-context nil "Dynamically non-nil when searching for projects in LSP context.") (defun eglot--current-project () "Return a project object for Eglot's LSP purposes. This relies on `project-current' and thus on `project-find-functions'. Functions in the latter variable (which see) can query the value `eglot-lsp-context' to decide whether a given directory is a project containing a suitable root directory for a given LSP server's purposes." (let ((eglot-lsp-context t)) (or (project-current) `(transient . ,(expand-file-name default-directory))))) (cl-defmethod project-root ((project (head eglot--project))) (cadr project)) ;;;###autoload (defun eglot (managed-major-modes project class contact language-ids &optional _interactive) "Start LSP server for PROJECT's buffers under MANAGED-MAJOR-MODES. This starts a Language Server Protocol (LSP) server suitable for the buffers of PROJECT whose `major-mode' is among MANAGED-MAJOR-MODES. CLASS is the class of the LSP server to start and CONTACT specifies how to connect to the server. Interactively, the command attempts to guess MANAGED-MAJOR-MODES, CLASS, CONTACT, and LANGUAGE-IDS from `eglot-server-programs', according to the current buffer's `major-mode'. PROJECT is guessed from `project-find-functions'. The search for active projects in this context binds `eglot-lsp-context' (which see). If it can't guess, it prompts the user for the mode and the server. With a single \\[universal-argument] prefix arg, it always prompts for COMMAND. With two \\[universal-argument], it also always prompts for MANAGED-MAJOR-MODE. The LSP server of CLASS is started (or contacted) via CONTACT. If this operation is successful, current *and future* file buffers of MANAGED-MAJOR-MODE inside PROJECT become \"managed\" by the LSP server, meaning the information about their contents is exchanged periodically with the server to provide enhanced code-analysis via `xref-find-definitions', `flymake-mode', `eldoc-mode', and `completion-at-point', among others. PROJECT is a project object as returned by `project-current'. CLASS is a subclass of `eglot-lsp-server'. CONTACT specifies how to contact the server. It is a keyword-value plist used to initialize CLASS or a plain list as described in `eglot-server-programs', which see. LANGUAGE-IDS is a list of language ID string to send to the server for each element in MANAGED-MAJOR-MODES. INTERACTIVE is ignored and provided for backward compatibility." (interactive (let ((current-server (eglot-current-server))) (unless (or (null current-server) (y-or-n-p "\ [eglot] Shut down current connection before attempting new one?")) (user-error "[eglot] Connection attempt aborted by user")) (prog1 (append (eglot--guess-contact t) '(t)) (when current-server (ignore-errors (eglot-shutdown current-server)))))) (eglot--connect (eglot--ensure-list managed-major-modes) project class contact (eglot--ensure-list language-ids))) (defun eglot-reconnect (server &optional interactive) "Reconnect to SERVER. INTERACTIVE is t if called interactively." (interactive (list (eglot--current-server-or-lose) t)) (when (jsonrpc-running-p server) (ignore-errors (eglot-shutdown server interactive nil 'preserve-buffers))) (eglot--connect (eglot--major-modes server) (eglot--project server) (eieio-object-class-name server) (eglot--saved-initargs server) (eglot--language-ids server)) (eglot--message "Reconnected!")) (defvar eglot--managed-mode) ; forward decl ;;;###autoload (defun eglot-ensure () "Start Eglot session for current buffer if there isn't one. Only use this function (in major mode hooks, etc) if you are confident that Eglot can be started safely and efficiently for *every* buffer visited where these hooks may execute. Since it is difficult to establish this confidence fully, it's often wise to use the interactive command `eglot' instead. This command only needs to be invoked once per project, as all other files of a given major mode visited within the same project will automatically become managed with no further user intervention needed." (let ((buffer (current-buffer))) (cl-labels ((maybe-connect () (eglot--when-live-buffer buffer (remove-hook 'post-command-hook #'maybe-connect t) (unless eglot--managed-mode (condition-case-unless-debug oops (apply #'eglot--connect (eglot--guess-contact)) (error (eglot--warn (error-message-string oops)))))))) (when buffer-file-name (add-hook 'post-command-hook #'maybe-connect 'append t))))) (defun eglot-events-buffer (server) "Display events buffer for SERVER. Use current server's or first available Eglot events buffer." (interactive (list (eglot-current-server))) (let ((buffer (if server (jsonrpc-events-buffer server) (cl-find "\\*EGLOT.*events\\*" (buffer-list) :key #'buffer-name :test #'string-match)))) (if buffer (display-buffer buffer) (eglot--error "Can't find an Eglot events buffer!")))) (defun eglot-stderr-buffer (server) "Display stderr buffer for SERVER." (interactive (list (eglot--current-server-or-lose))) (display-buffer (jsonrpc-stderr-buffer server))) (defun eglot-forget-pending-continuations (server) "Forget pending requests for SERVER." (interactive (list (eglot--current-server-or-lose))) (jsonrpc-forget-pending-continuations server)) (defvar eglot-connect-hook '(eglot-signal-didChangeConfiguration) "Hook run after connecting in `eglot--connect'.") (defvar eglot-server-initialized-hook '() "Hook run after a `eglot-lsp-server' instance is created. That is before a connection was established. Use `eglot-connect-hook' to hook into when a connection was successfully established and the server on the other side has received the initializing configuration. Each function is passed the server as an argument") (defun eglot--cmd (contact) "Helper for `eglot--connect'." (if (file-remote-p default-directory) ;; TODO: this seems like a bug, although it’s everywhere. For ;; some reason, for remote connections only, over a pipe, we ;; need to turn off line buffering on the tty. ;; ;; Not only does this seem like there should be a better way, ;; but it almost certainly doesn’t work on non-unix systems. (list shell-file-name "-c" (string-join (cons "stty raw > /dev/null;" (mapcar #'shell-quote-argument contact)) " ")) contact)) (defvar-local eglot--cached-server nil "A cached reference to the current Eglot server.") (defun eglot--connect (managed-modes project class contact language-ids) "Connect to MANAGED-MODES, LANGUAGE-IDS, PROJECT, CLASS and CONTACT. This docstring appeases checkdoc, that's all." (let* ((default-directory (project-root project)) (nickname (project-name project)) (readable-name (progn (unless (file-exists-p default-directory) ;; could happen because of bug#70724 or just because (eglot--error "Project '%s' is gone!" nickname)) (format "EGLOT (%s/%s)" nickname managed-modes))) server-info (contact (if (functionp contact) (funcall contact) contact)) (initargs (cond ((keywordp (car contact)) contact) ((integerp (cadr contact)) (setq server-info (list (format "%s:%s" (car contact) (cadr contact)))) `(:process ,(lambda () (apply #'open-network-stream readable-name nil (car contact) (cadr contact) (cddr contact))))) ((and (stringp (car contact)) (cl-find-if (lambda (x) (or (eq x :autoport) (eq (car-safe x) :autoport))) contact)) (setq server-info (list "")) `(:process ,(jsonrpc-autoport-bootstrap readable-name contact :connect-args '(:noquery t)))) ((stringp (car contact)) (let* ((probe (cl-position-if #'keywordp contact)) (more-initargs (and probe (cl-subseq contact probe))) (contact (cl-subseq contact 0 probe))) `(:process ,(lambda () (let ((default-directory default-directory) ;; bug#61350: Tramp turns on a feature ;; by default that can't (yet) handle ;; very much data so we turn it off ;; unconditionally -- just for our ;; process. (tramp-use-ssh-controlmaster-options 'suppress) (tramp-ssh-controlmaster-options "-o ControlMaster=no -o ControlPath=none")) (make-process :name readable-name :command (setq server-info (eglot--cmd contact)) :connection-type 'pipe :coding 'utf-8-emacs-unix :noquery t :stderr (get-buffer-create (format "*%s stderr*" readable-name)) :file-handler t))) ,@more-initargs))))) (spread (lambda (fn) (lambda (server method params) (let ((eglot--cached-server server)) (apply fn server method (append params nil)))))) (server (apply #'make-instance class :name readable-name :events-buffer-config eglot-events-buffer-config :notification-dispatcher (funcall spread #'eglot-handle-notification) :request-dispatcher (funcall spread #'eglot-handle-request) :on-shutdown #'eglot--on-shutdown initargs)) (canceled nil) (tag (make-symbol "connected-catch-tag"))) (when server-info (jsonrpc--debug server "Running language server: %s" (string-join server-info " "))) (setf (eglot--saved-initargs server) initargs) (setf (eglot--project server) project) (setf (eglot--project-nickname server) nickname) (setf (eglot--languages server) (cl-loop for m in managed-modes for l in language-ids collect (cons m l))) (run-hook-with-args 'eglot-server-initialized-hook server) ;; Now start the handshake. To honor `eglot-sync-connect' ;; maybe-sync-maybe-async semantics we use `jsonrpc-async-request' ;; and mimic most of `jsonrpc-request'. (unwind-protect (condition-case _quit (let ((retval (catch tag (jsonrpc-async-request server :initialize (list :processId (unless (or eglot-withhold-process-id (file-remote-p default-directory) (eq (jsonrpc-process-type server) 'network)) (emacs-pid)) :clientInfo (append '(:name "Eglot") (let ((v (package-get-version))) (and v (list :version v)))) ;; Maybe turn trampy `/ssh:foo@bar:/path/to/baz.py' ;; into `/path/to/baz.py', so LSP groks it. :rootPath (file-local-name (expand-file-name default-directory)) :rootUri (eglot-path-to-uri default-directory) :initializationOptions (eglot-initialization-options server) :capabilities (eglot-client-capabilities server) :workspaceFolders (eglot-workspace-folders server)) :success-fn (eglot--lambda ((InitializeResult) capabilities serverInfo) (unless canceled (push server (gethash project eglot--servers-by-project)) (setf (eglot--capabilities server) capabilities) (setf (eglot--server-info server) serverInfo) (jsonrpc-notify server :initialized eglot--{}) (dolist (buffer (buffer-list)) (with-current-buffer buffer ;; No need to pass SERVER as an argument: it has ;; been registered in `eglot--servers-by-project', ;; so that it can be found (and cached) from ;; `eglot--maybe-activate-editing-mode' in any ;; managed buffer. (eglot--maybe-activate-editing-mode))) (setf (eglot--inhibit-autoreconnect server) (cond ((booleanp eglot-autoreconnect) (not eglot-autoreconnect)) ((cl-plusp eglot-autoreconnect) (run-with-timer eglot-autoreconnect nil (lambda () (setf (eglot--inhibit-autoreconnect server) (null eglot-autoreconnect))))))) (run-hook-with-args 'eglot-connect-hook server) (eglot--message "Connected! Server `%s' now managing `%s' buffers \ in project `%s'." (or (plist-get serverInfo :name) (jsonrpc-name server)) managed-modes (eglot-project-nickname server)) (when tag (throw tag t)))) :timeout eglot-connect-timeout :error-fn (eglot--lambda ((ResponseError) code message) (unless canceled (jsonrpc-shutdown server) (let ((msg (format "%s: %s" code message))) (if tag (throw tag `(error . ,msg)) (eglot--error msg))))) :timeout-fn (lambda () (unless canceled (jsonrpc-shutdown server) (let ((msg (format "Timed out after %s seconds" eglot-connect-timeout))) (if tag (throw tag `(error . ,msg)) (eglot--error msg)))))) (cond ((numberp eglot-sync-connect) (accept-process-output nil eglot-sync-connect)) (eglot-sync-connect (while t (accept-process-output nil eglot-connect-timeout))))))) (pcase retval (`(error . ,msg) (eglot--error msg)) (`nil (eglot--message "Waiting in background for server `%s'" (jsonrpc-name server)) nil) (_ server))) (quit (jsonrpc-shutdown server) (setq canceled 'quit))) (setq tag nil)))) ;;; Helpers (move these to API?) ;;; (defun eglot--error (format &rest args) "Error out with FORMAT with ARGS." (error "[eglot] %s" (apply #'format format args))) (defun eglot--message (format &rest args) "Message out with FORMAT with ARGS." (message "[eglot] %s" (apply #'format format args))) (defun eglot--warn (format &rest args) "Warning message with FORMAT and ARGS." (apply #'eglot--message (concat "(warning) " format) args) (let ((warning-minimum-level :error)) (display-warning 'eglot (apply #'format format args) :warning))) (defalias 'eglot--bol (if (fboundp 'pos-bol) #'pos-bol (lambda (&optional n) (let ((inhibit-field-text-motion t)) (line-beginning-position n)))) "Return position of first character in current line.") (cl-defun eglot--request (server method params &key immediate timeout cancel-on-input cancel-on-input-retval) "Like `jsonrpc-request', but for Eglot LSP requests. Unless IMMEDIATE, send pending changes before making request." (unless immediate (eglot--signal-textDocument/didChange)) (jsonrpc-request server method params :timeout timeout :cancel-on-input cancel-on-input :cancel-on-input-retval cancel-on-input-retval)) ;;; Encoding fever ;;; (defvar eglot-current-linepos-function #'eglot-utf-16-linepos "Function calculating position relative to line beginning. It is a function of no arguments considering the text from line beginning up to current point. The return value is the number of UTF code units needed to encode that text from the LSP server's perspective. This may be a number of octets, 16-bit words or Unicode code points, depending on whether the LSP server's `positionEncoding' capability is UTF-8, UTF-16 or UTF-32, respectively. Position of point should remain unaltered if that return value is fed through the corresponding inverse function `eglot-move-to-linepos-function' (which see).") (defun eglot-utf-8-linepos () "Calculate number of UTF-8 bytes from line beginning." (length (encode-coding-region (eglot--bol) (point) 'utf-8-unix t))) (defun eglot-utf-16-linepos (&optional lbp) "Calculate number of UTF-16 code units from position given by LBP. LBP defaults to `eglot--bol'." (/ (- (length (encode-coding-region (or lbp (eglot--bol)) ;; FIXME: How could `point' ever be ;; larger than `point-max' (sounds like ;; a bug in Emacs). ;; Fix github#860 (min (point) (point-max)) 'utf-16 t)) 2) 2)) (defun eglot-utf-32-linepos () "Calculate number of Unicode codepoints from line beginning." (- (point) (eglot--bol))) (defun eglot--pos-to-lsp-position (&optional pos) "Convert point POS to LSP position." (eglot--widening ;; LSP line is zero-origin; emacs is one-origin. (list :line (1- (line-number-at-pos pos t)) :character (progn (when pos (goto-char pos)) (funcall eglot-current-linepos-function))))) (defun eglot--virtual-pos-to-lsp-position (pos string) "Return the LSP position at the end of STRING if it were inserted at POS." (eglot--widening (goto-char pos) (forward-line 0) ;; LSP line is zero-origin; Emacs is one-origin. (let ((posline (1- (line-number-at-pos nil t))) (linebeg (buffer-substring (point) pos)) (colfun eglot-current-linepos-function)) ;; Use a temp buffer because: ;; - I don't know of a fast way to count newlines in a string. ;; - We currently don't have `eglot-current-linepos-function' for strings. (with-temp-buffer (insert linebeg string) (goto-char (point-max)) (list :line (+ posline (1- (line-number-at-pos nil t))) :character (funcall colfun)))))) (defvar eglot-move-to-linepos-function #'eglot-move-to-utf-16-linepos "Function to move to a position within a line reported by the LSP server. Per the LSP spec, character offsets in LSP Position objects count UTF-16 code units, not actual code points. So when LSP says position 3 of a line containing just \"aXbc\", where X is a funny looking character in the UTF-16 \"supplementary plane\", it actually means `b', not `c'. The default value `eglot-move-to-utf-16-linepos' accounts for this. This variable can also be set to `eglot-move-to-utf-8-linepos' or `eglot-move-to-utf-32-linepos' for servers not closely following the spec. Also, since LSP 3.17 server and client may agree on an encoding and Eglot will set this variable automatically.") (defun eglot-move-to-utf-8-linepos (n) "Move to line's Nth byte as computed by LSP's UTF-8 criterion." (let* ((bol (eglot--bol)) (goal-byte (+ (position-bytes bol) n)) (eol (line-end-position))) (goto-char bol) (while (and (< (position-bytes (point)) goal-byte) (< (point) eol)) ;; raw bytes take 2 bytes in the buffer (when (>= (char-after) #x3fff80) (setq goal-byte (1+ goal-byte))) (forward-char 1)))) (defun eglot-move-to-utf-16-linepos (n) "Move to line's Nth code unit as computed by LSP's UTF-16 criterion." (let* ((bol (eglot--bol)) (goal-char (+ bol n)) (eol (line-end-position))) (goto-char bol) (while (and (< (point) goal-char) (< (point) eol)) ;; code points in the "supplementary place" use two code units (when (<= #x010000 (char-after) #x10ffff) (setq goal-char (1- goal-char))) (forward-char 1)))) (defun eglot-move-to-utf-32-linepos (n) "Move to line's Nth codepoint as computed by LSP's UTF-32 criterion." ;; We cannot use `move-to-column' here, because it moves to *visual* ;; columns, which can be different from LSP characters in case of ;; `whitespace-mode', `prettify-symbols-mode', etc. (github#296, ;; github#297) (goto-char (min (+ (eglot--bol) n) (line-end-position)))) (defun eglot--lsp-position-to-point (pos-plist &optional marker) "Convert LSP position POS-PLIST to Emacs point. If optional MARKER, return a marker instead" (save-excursion (save-restriction (widen) (goto-char (point-min)) (forward-line (min most-positive-fixnum (plist-get pos-plist :line))) (unless (eobp) ;; if line was excessive leave point at eob (let ((col (plist-get pos-plist :character))) (unless (wholenump col) (eglot--warn "Caution: LSP server sent invalid character position %s. Using 0 instead." col) (setq col 0)) (funcall eglot-move-to-linepos-function col))) (if marker (copy-marker (point-marker)) (point))))) ;;; More helpers (defconst eglot--uri-path-allowed-chars (let ((vec (copy-sequence url-path-allowed-chars))) (aset vec ?: nil) ;; see github#639 vec) "Like `url-path-allowed-chars' but more restrictive.") (defun eglot--snippet-expansion-fn () "Compute a function to expand snippets. Doubles as an indicator of snippet support." (and (fboundp 'yas-minor-mode) (lambda (&rest args) (with-no-warnings (unless (bound-and-true-p yas-minor-mode) (yas-minor-mode 1)) (apply #'yas-expand-snippet args))))) (defun eglot--format-markup (markup) "Format MARKUP according to LSP's spec. MARKUP is either an LSP MarkedString or MarkupContent object." (let (string mode language) (cond ((stringp markup) (setq string markup mode 'gfm-view-mode)) ((setq language (plist-get markup :language)) ;; Deprecated MarkedString (setq string (concat "```" language "\n" (plist-get markup :value) "\n```") mode 'gfm-view-mode)) (t ;; MarkupContent (setq string (plist-get markup :value) mode (pcase (plist-get markup :kind) ("markdown" 'gfm-view-mode) ("plaintext" 'text-mode) (_ major-mode))))) (with-temp-buffer (setq-local markdown-fontify-code-blocks-natively t) (insert string) (let ((inhibit-message t) (message-log-max nil) match) (ignore-errors (delay-mode-hooks (funcall mode))) (font-lock-ensure) (goto-char (point-min)) (let ((inhibit-read-only t)) (while (setq match (text-property-search-forward 'invisible)) (delete-region (prop-match-beginning match) (prop-match-end match)))) (string-trim (buffer-string)))))) (defun eglot--read-server (prompt &optional dont-if-just-the-one) "Read a running Eglot server from minibuffer using PROMPT. If DONT-IF-JUST-THE-ONE and there's only one server, don't prompt and just return it. PROMPT shouldn't end with a question mark." (let ((servers (cl-loop for servers being hash-values of eglot--servers-by-project append servers)) (name (lambda (srv) (format "%s %s" (eglot-project-nickname srv) (eglot--major-modes srv))))) (cond ((null servers) (eglot--error "No servers!")) ((or (cdr servers) (not dont-if-just-the-one)) (let* ((default (when-let ((current (eglot-current-server))) (funcall name current))) (read (completing-read (if default (format "%s (default %s)? " prompt default) (concat prompt "? ")) (mapcar name servers) nil t nil nil default))) (cl-find read servers :key name :test #'equal))) (t (car servers))))) (defun eglot--trampish-p (server) "Tell if SERVER's project root is `file-remote-p'." (file-remote-p (project-root (eglot--project server)))) (defun eglot--plist-keys (plist) "Get keys of a plist." (cl-loop for (k _v) on plist by #'cddr collect k)) (defalias 'eglot--ensure-list (if (fboundp 'ensure-list) #'ensure-list (lambda (x) (if (listp x) x (list x))))) ;;; Minor modes ;;; (defvar eglot-mode-map (let ((map (make-sparse-keymap))) (define-key map [remap display-local-help] #'eldoc-doc-buffer) map)) (defvar-local eglot--current-flymake-report-fn nil "Current flymake report function for this buffer.") (defvar-local eglot--saved-bindings nil "Bindings saved by `eglot--setq-saving'.") (defvar eglot-stay-out-of '() "List of Emacs things that Eglot should try to stay of. Each element is a string, a symbol, or a regexp which is matched against a variable's name. Examples include the string \"company\" or the symbol `xref'. Before Eglot starts \"managing\" a particular buffer, it opinionatedly sets some peripheral Emacs facilities, such as Flymake, Xref and Company. These overriding settings help ensure consistent Eglot behavior and only stay in place until \"managing\" stops (usually via `eglot-shutdown'), whereupon the previous settings are restored. However, if you wish for Eglot to stay out of a particular Emacs facility that you'd like to keep control of add an element to this list and Eglot will refrain from setting it. For example, to keep your Company customization, add the symbol `company' to this variable.") (defun eglot--stay-out-of-p (symbol) "Tell if Eglot should stay out of SYMBOL." (cl-find (symbol-name symbol) eglot-stay-out-of :test (lambda (s thing) (let ((re (if (symbolp thing) (symbol-name thing) thing))) (string-match re s))))) (defmacro eglot--setq-saving (symbol binding) `(unless (or (not (boundp ',symbol)) (eglot--stay-out-of-p ',symbol)) (push (cons ',symbol (symbol-value ',symbol)) eglot--saved-bindings) (setq-local ,symbol ,binding))) (defun eglot-managed-p () "Tell if current buffer is managed by Eglot." eglot--managed-mode) (defvar eglot-managed-mode-hook nil "A hook run by Eglot after it started/stopped managing a buffer. Use `eglot-managed-p' to determine if current buffer is managed.") (defvar-local eglot--track-changes nil) (define-minor-mode eglot--managed-mode "Mode for source buffers managed by some Eglot project." :init-value nil :lighter nil :keymap eglot-mode-map :interactive nil (cond (eglot--managed-mode (pcase (plist-get (eglot--capabilities (eglot-current-server)) :positionEncoding) ("utf-32" (eglot--setq-saving eglot-current-linepos-function #'eglot-utf-32-linepos) (eglot--setq-saving eglot-move-to-linepos-function #'eglot-move-to-utf-32-linepos)) ("utf-8" (eglot--setq-saving eglot-current-linepos-function #'eglot-utf-8-linepos) (eglot--setq-saving eglot-move-to-linepos-function #'eglot-move-to-utf-8-linepos))) (unless eglot--track-changes (setq eglot--track-changes (track-changes-register #'eglot--track-changes-signal :disjoint t))) (add-hook 'kill-buffer-hook #'eglot--managed-mode-off nil t) ;; Prepend "didClose" to the hook after the "nonoff", so it will run first (add-hook 'kill-buffer-hook #'eglot--signal-textDocument/didClose nil t) (add-hook 'before-revert-hook #'eglot--signal-textDocument/didClose nil t) (add-hook 'after-revert-hook #'eglot--after-revert-hook nil t) (add-hook 'before-save-hook #'eglot--signal-textDocument/willSave nil t) (add-hook 'after-save-hook #'eglot--signal-textDocument/didSave nil t) (unless (eglot--stay-out-of-p 'xref) (add-hook 'xref-backend-functions #'eglot-xref-backend nil t)) (add-hook 'completion-at-point-functions #'eglot-completion-at-point nil t) (add-hook 'completion-in-region-mode-hook #'eglot--capf-session-flush nil t) (add-hook 'company-after-completion-hook #'eglot--capf-session-flush nil t) (add-hook 'change-major-mode-hook #'eglot--managed-mode-off nil t) (add-hook 'post-self-insert-hook #'eglot--post-self-insert-hook nil t) (add-hook 'pre-command-hook #'eglot--pre-command-hook nil t) (eglot--setq-saving xref-prompt-for-identifier nil) (eglot--setq-saving flymake-diagnostic-functions '(eglot-flymake-backend)) (eglot--setq-saving company-backends '(company-capf)) (eglot--setq-saving company-tooltip-align-annotations t) (eglot--setq-saving eldoc-documentation-strategy #'eldoc-documentation-compose) (unless (eglot--stay-out-of-p 'imenu) (add-function :before-until (local 'imenu-create-index-function) #'eglot-imenu)) (unless (eglot--stay-out-of-p 'flymake) (flymake-mode 1)) (unless (eglot--stay-out-of-p 'eldoc) (add-hook 'eldoc-documentation-functions #'eglot-hover-eldoc-function nil t) (add-hook 'eldoc-documentation-functions #'eglot-signature-eldoc-function nil t) (eldoc-mode 1)) (cl-pushnew (current-buffer) (eglot--managed-buffers (eglot-current-server)))) (t (remove-hook 'kill-buffer-hook #'eglot--managed-mode-off t) (remove-hook 'kill-buffer-hook #'eglot--signal-textDocument/didClose t) (remove-hook 'before-revert-hook #'eglot--signal-textDocument/didClose t) (remove-hook 'after-revert-hook #'eglot--after-revert-hook t) (remove-hook 'before-save-hook #'eglot--signal-textDocument/willSave t) (remove-hook 'after-save-hook #'eglot--signal-textDocument/didSave t) (remove-hook 'xref-backend-functions #'eglot-xref-backend t) (remove-hook 'completion-at-point-functions #'eglot-completion-at-point t) (remove-hook 'completion-in-region-mode-hook #'eglot--capf-session-flush t) (remove-hook 'company-after-completion-hook #'eglot--capf-session-flush t) (remove-hook 'change-major-mode-hook #'eglot--managed-mode-off t) (remove-hook 'post-self-insert-hook #'eglot--post-self-insert-hook t) (remove-hook 'pre-command-hook #'eglot--pre-command-hook t) (remove-hook 'eldoc-documentation-functions #'eglot-hover-eldoc-function t) (remove-hook 'eldoc-documentation-functions #'eglot-signature-eldoc-function t) (cl-loop for (var . saved-binding) in eglot--saved-bindings do (set (make-local-variable var) saved-binding)) (remove-function (local 'imenu-create-index-function) #'eglot-imenu) (when eglot--current-flymake-report-fn (eglot--report-to-flymake nil) (setq eglot--current-flymake-report-fn nil)) (run-hooks 'eglot-managed-mode-hook) (let ((server eglot--cached-server)) (setq eglot--cached-server nil) (when server (setf (eglot--managed-buffers server) (delq (current-buffer) (eglot--managed-buffers server))) (when (and eglot-autoshutdown (null (eglot--managed-buffers server))) (eglot-shutdown server)))) (when eglot--track-changes (track-changes-unregister eglot--track-changes) (setq eglot--track-changes nil))))) (defun eglot--managed-mode-off () "Turn off `eglot--managed-mode' unconditionally." (remove-overlays nil nil 'eglot--overlay t) (eglot-inlay-hints-mode -1) (eglot--managed-mode -1)) (defun eglot-current-server () "Return logical Eglot server for current buffer, nil if none." (setq eglot--cached-server (or eglot--cached-server (and (not (eq major-mode 'fundamental-mode)) ; gh#1330 (or (cl-find-if #'eglot--languageId (gethash (eglot--current-project) eglot--servers-by-project)) (and eglot-extend-to-xref buffer-file-name (gethash (expand-file-name buffer-file-name) eglot--servers-by-xrefed-file))))))) (defun eglot--current-server-or-lose () "Return current logical Eglot server connection or error." (or (eglot-current-server) (jsonrpc-error "No current JSON-RPC connection"))) (defvar-local eglot--diagnostics nil "Flymake diagnostics for this buffer.") (defvar revert-buffer-preserve-modes) (defun eglot--after-revert-hook () "Eglot's `after-revert-hook'." (when revert-buffer-preserve-modes (eglot--signal-textDocument/didOpen))) (defun eglot--maybe-activate-editing-mode () "Maybe activate `eglot--managed-mode'. If it is activated, also signal textDocument/didOpen." (unless eglot--managed-mode ;; Called when `revert-buffer-in-progress-p' is t but ;; `revert-buffer-preserve-modes' is nil. (when (and buffer-file-name (eglot-current-server)) (setq eglot--diagnostics nil) (eglot--managed-mode) (eglot--signal-textDocument/didOpen) ;; Run user hook after 'textDocument/didOpen' so server knows ;; about the buffer. (eglot-inlay-hints-mode 1) (run-hooks 'eglot-managed-mode-hook)))) (add-hook 'after-change-major-mode-hook #'eglot--maybe-activate-editing-mode) (defun eglot-clear-status (server) "Clear the last JSONRPC error for SERVER." (interactive (list (eglot--current-server-or-lose))) (setf (jsonrpc-last-error server) nil)) ;;; Mode-line, menu and other sugar ;;; (defvar eglot--mode-line-format `(:eval (eglot--mode-line-format))) (put 'eglot--mode-line-format 'risky-local-variable t) (defun eglot--mouse-call (what &optional update-mode-line) "Make an interactive lambda for calling WHAT with the mouse." (lambda (event) (interactive "e") (let ((start (event-start event))) (with-selected-window (posn-window start) (save-excursion (goto-char (or (posn-point start) (point))) (call-interactively what) (when update-mode-line (force-mode-line-update t))))))) (defun eglot-manual () "Read Eglot's manual." (declare (obsolete info "1.10")) (interactive) (info "(eglot)")) ;;;###autoload (defun eglot-upgrade-eglot (&rest _) "Update Eglot to latest version." (interactive) (with-no-warnings (require 'package) (unless package-archive-contents (package-refresh-contents)) (when-let ((existing (cadr (assoc 'eglot package-alist)))) (package-delete existing t)) (package-install (cadr (assoc 'eglot package-archive-contents))))) (easy-menu-define eglot-menu nil "Eglot" `("Eglot" ;; Commands for getting information and customization. ["Customize Eglot" (lambda () (interactive) (customize-group "eglot"))] "--" ;; xref like commands. ["Find definitions" xref-find-definitions :help "Find definitions of identifier at point" :active (eglot-server-capable :definitionProvider)] ["Find references" xref-find-references :help "Find references to identifier at point" :active (eglot-server-capable :referencesProvider)] ["Find symbols in workspace (apropos)" xref-find-apropos :help "Find symbols matching a query" :active (eglot-server-capable :workspaceSymbolProvider)] ["Find declaration" eglot-find-declaration :help "Find declaration for identifier at point" :active (eglot-server-capable :declarationProvider)] ["Find implementation" eglot-find-implementation :help "Find implementation for identifier at point" :active (eglot-server-capable :implementationProvider)] ["Find type definition" eglot-find-typeDefinition :help "Find type definition for identifier at point" :active (eglot-server-capable :typeDefinitionProvider)] "--" ;; LSP-related commands (mostly Eglot's own commands). ["Rename symbol" eglot-rename :active (eglot-server-capable :renameProvider)] ["Format buffer" eglot-format-buffer :active (eglot-server-capable :documentFormattingProvider)] ["Format active region" eglot-format :active (and (region-active-p) (eglot-server-capable :documentRangeFormattingProvider))] ["Show Flymake diagnostics for buffer" flymake-show-buffer-diagnostics] ["Show Flymake diagnostics for project" flymake-show-project-diagnostics] ["Show Eldoc documentation at point" eldoc-doc-buffer] "--" ["All possible code actions" eglot-code-actions :active (eglot-server-capable :codeActionProvider)] ["Organize imports" eglot-code-action-organize-imports :visible (eglot-server-capable :codeActionProvider)] ["Extract" eglot-code-action-extract :visible (eglot-server-capable :codeActionProvider)] ["Inline" eglot-code-action-inline :visible (eglot-server-capable :codeActionProvider)] ["Rewrite" eglot-code-action-rewrite :visible (eglot-server-capable :codeActionProvider)] ["Quickfix" eglot-code-action-quickfix :visible (eglot-server-capable :codeActionProvider)])) (easy-menu-define eglot-server-menu nil "Monitor server communication" '("Debugging the server communication" ["Reconnect to server" eglot-reconnect] ["Quit server" eglot-shutdown] "--" ["LSP events buffer" eglot-events-buffer] ["Server stderr buffer" eglot-stderr-buffer] ["Customize event buffer size" (lambda () (interactive) (customize-variable 'eglot-events-buffer-size))])) (defun eglot--mode-line-props (thing face defs &optional prepend) "Helper for function `eglot--mode-line-format'. Uses THING, FACE, DEFS and PREPEND." (cl-loop with map = (make-sparse-keymap) for (elem . rest) on defs for (key def help) = elem do (define-key map `[mode-line ,key] (eglot--mouse-call def t)) concat (format "%s: %s" key help) into blurb when rest concat "\n" into blurb finally (return `(:propertize ,thing face ,face keymap ,map help-echo ,(concat prepend blurb) mouse-face mode-line-highlight)))) (defun eglot--mode-line-format () "Compose Eglot's mode-line." (let* ((server (eglot-current-server)) (nick (and server (eglot-project-nickname server))) (pending (and server (jsonrpc-continuation-count server))) (last-error (and server (jsonrpc-last-error server)))) (append `(,(propertize eglot-menu-string 'face 'eglot-mode-line 'mouse-face 'mode-line-highlight 'help-echo "Eglot: Emacs LSP client\nmouse-1: Display minor mode menu" 'keymap (let ((map (make-sparse-keymap))) (define-key map [mode-line down-mouse-1] eglot-menu) map))) (when nick `(":" ,(propertize nick 'face 'eglot-mode-line 'mouse-face 'mode-line-highlight 'help-echo (format "Project '%s'\nmouse-1: LSP server control menu" nick) 'keymap (let ((map (make-sparse-keymap))) (define-key map [mode-line down-mouse-1] eglot-server-menu) map)) ,@(when last-error `("/" ,(eglot--mode-line-props "error" 'compilation-mode-line-fail '((mouse-3 eglot-clear-status "Clear this status")) (format "An error occurred: %s\n" (plist-get last-error :message))))) ,@(when (cl-plusp pending) `("/" ,(eglot--mode-line-props (format "%d" pending) 'warning '((mouse-3 eglot-forget-pending-continuations "Forget pending continuations")) "Number of outgoing, \ still unanswered LSP requests to the server\n"))) ,@(cl-loop for pr hash-values of (eglot--progress-reporters server) when (eq (car pr) 'eglot--mode-line-reporter) append `("/" ,(eglot--mode-line-props (format "%s%%%%" (or (nth 4 pr) "?")) 'eglot-mode-line nil (format "(%s) %s %s" (nth 1 pr) (nth 2 pr) (nth 3 pr)))))))))) (add-to-list 'mode-line-misc-info `(eglot--managed-mode (" [" eglot--mode-line-format "] "))) ;;; Flymake customization ;;; (put 'eglot-note 'flymake-category 'flymake-note) (put 'eglot-warning 'flymake-category 'flymake-warning) (put 'eglot-error 'flymake-category 'flymake-error) (defalias 'eglot--make-diag #'flymake-make-diagnostic) (defalias 'eglot--diag-data #'flymake-diagnostic-data) (defvar eglot-diagnostics-map (let ((map (make-sparse-keymap))) (define-key map [mouse-2] #'eglot-code-actions-at-mouse) map) "Keymap active in Eglot-backed Flymake diagnostic overlays.") (cl-loop for i from 1 for type in '(eglot-note eglot-warning eglot-error) do (put type 'flymake-overlay-control `((mouse-face . highlight) (priority . ,(+ 50 i)) (keymap . ,eglot-diagnostics-map)))) ;;; Protocol implementation (Requests, notifications, etc) ;;; (cl-defmethod eglot-handle-notification (_server method &key &allow-other-keys) "Handle unknown notification." (unless (or (string-prefix-p "$" (format "%s" method)) (not (memq 'disallow-unknown-methods eglot-strict-mode))) (eglot--warn "Server sent unknown notification method `%s'" method))) (cl-defmethod eglot-handle-request (_server method &key &allow-other-keys) "Handle unknown request." (when (memq 'disallow-unknown-methods eglot-strict-mode) (jsonrpc-error "Unknown request method `%s'" method))) (cl-defmethod eglot-handle-notification (_server (_method (eql window/showMessage)) &key type message) "Handle notification window/showMessage." (eglot--message (propertize "Server reports (type=%s): %s" 'face (if (<= type 1) 'error)) type message)) (cl-defmethod eglot-handle-request (_server (_method (eql window/showMessageRequest)) &key type message actions &allow-other-keys) "Handle server request window/showMessageRequest." (let* ((actions (append actions nil)) ;; gh#627 (label (completing-read (concat (format (propertize "[eglot] Server reports (type=%s): %s" 'face (if (or (not type) (<= type 1)) 'error)) type message) "\nChoose an option: ") (or (mapcar (lambda (obj) (plist-get obj :title)) actions) '("OK")) nil t (plist-get (elt actions 0) :title)))) (if label `(:title ,label) :null))) (cl-defmethod eglot-handle-notification (_server (_method (eql window/logMessage)) &key _type _message) "Handle notification window/logMessage.") ;; noop, use events buffer (cl-defmethod eglot-handle-notification (_server (_method (eql telemetry/event)) &rest _any) "Handle notification telemetry/event.") ;; noop, use events buffer (defalias 'eglot--reporter-update (if (> emacs-major-version 26) #'progress-reporter-update (lambda (a b &optional _c) (progress-reporter-update a b)))) (cl-defmethod eglot-handle-notification (server (_method (eql $/progress)) &key token value) "Handle $/progress notification identified by TOKEN from SERVER." (when eglot-report-progress (cl-flet ((fmt (&rest args) (mapconcat #'identity args " ")) (mkpr (title) (if (eq eglot-report-progress 'messages) (make-progress-reporter (format "[eglot] %s %s: %s" (eglot-project-nickname server) token title)) (list 'eglot--mode-line-reporter token title))) (upd (pcnt msg &optional (pr (gethash token (eglot--progress-reporters server)))) (cond ((eq (car pr) 'eglot--mode-line-reporter) (setcdr (cddr pr) (list msg pcnt)) (force-mode-line-update t)) (pr (eglot--reporter-update pr pcnt msg))))) (eglot--dbind ((WorkDoneProgress) kind title percentage message) value (pcase kind ("begin" (upd percentage (fmt title message) (puthash token (mkpr title) (eglot--progress-reporters server)))) ("report" (upd percentage message)) ("end" (upd (or percentage 100) message) (run-at-time 2 nil (lambda () (remhash token (eglot--progress-reporters server)))))))))) (defvar-local eglot--TextDocumentIdentifier-cache nil "LSP TextDocumentIdentifier-related cached info for current buffer. Value is (TRUENAME . (:uri STR)), where STR is what is sent to the server on textDocument/didOpen and similar calls. TRUENAME is the expensive cached value of `file-truename'.") (cl-defmethod eglot-handle-notification (server (_method (eql textDocument/publishDiagnostics)) &key uri diagnostics &allow-other-keys) ; FIXME: doesn't respect `eglot-strict-mode' "Handle notification publishDiagnostics." (cl-flet ((eglot--diag-type (sev) (cond ((null sev) 'eglot-error) ((<= sev 1) 'eglot-error) ((= sev 2) 'eglot-warning) (t 'eglot-note))) (mess (source code message) (concat source (and code (format " [%s]" code)) ": " message)) (find-it (abspath) ;; `find-buffer-visiting' would be natural, but calls the ;; potentially slow `file-truename' (bug#70036). (cl-loop for b in (eglot--managed-buffers server) when (with-current-buffer b (equal (car eglot--TextDocumentIdentifier-cache) abspath)) return b))) (if-let* ((path (expand-file-name (eglot-uri-to-path uri))) (buffer (find-it path))) (with-current-buffer buffer (cl-loop initially (setq flymake-list-only-diagnostics (assoc-delete-all path flymake-list-only-diagnostics)) for diag-spec across diagnostics collect (eglot--dbind ((Diagnostic) range code message severity source tags) diag-spec (setq message (mess source code message)) (pcase-let ((`(,beg . ,end) (eglot-range-region range))) ;; Fallback to `flymake-diag-region' if server ;; botched the range (when (= beg end) (if-let* ((st (plist-get range :start)) (diag-region (flymake-diag-region (current-buffer) (1+ (plist-get st :line)) (plist-get st :character)))) (setq beg (car diag-region) end (cdr diag-region)) (eglot--widening (goto-char (point-min)) (setq beg (eglot--bol (1+ (plist-get (plist-get range :start) :line)))) (setq end (line-end-position (1+ (plist-get (plist-get range :end) :line))))))) (eglot--make-diag (current-buffer) beg end (eglot--diag-type severity) message `((eglot-lsp-diag . ,diag-spec)) (when-let ((faces (cl-loop for tag across tags when (alist-get tag eglot--tag-faces) collect it))) `((face . ,faces)))))) into diags finally (cond ((and ;; only add to current report if Flymake ;; starts on idle-timer (github#958) (not (null flymake-no-changes-timeout)) eglot--current-flymake-report-fn) (eglot--report-to-flymake diags)) (t (setq eglot--diagnostics diags))))) (cl-loop for diag-spec across diagnostics collect (eglot--dbind ((Diagnostic) code range message severity source) diag-spec (setq message (mess source code message)) (let* ((start (plist-get range :start)) (line (1+ (plist-get start :line))) (char (1+ (plist-get start :character)))) (eglot--make-diag path (cons line char) nil (eglot--diag-type severity) message))) into diags finally (setq flymake-list-only-diagnostics (assoc-delete-all path flymake-list-only-diagnostics)) (push (cons path diags) flymake-list-only-diagnostics))))) (cl-defun eglot--register-unregister (server things how) "Helper for `registerCapability'. THINGS are either registrations or unregisterations (sic)." (cl-loop for thing in (cl-coerce things 'list) do (eglot--dbind ((Registration) id method registerOptions) thing (apply (cl-ecase how (register 'eglot-register-capability) (unregister 'eglot-unregister-capability)) server (intern method) id registerOptions)))) (cl-defmethod eglot-handle-request (server (_method (eql client/registerCapability)) &key registrations) "Handle server request client/registerCapability." (eglot--register-unregister server registrations 'register)) (cl-defmethod eglot-handle-request (server (_method (eql client/unregisterCapability)) &key unregisterations) ;; XXX: "unregisterations" (sic) "Handle server request client/unregisterCapability." (eglot--register-unregister server unregisterations 'unregister)) (cl-defmethod eglot-handle-request (_server (_method (eql workspace/applyEdit)) &key _label edit) "Handle server request workspace/applyEdit." (eglot--apply-workspace-edit edit last-command) `(:applied t)) (cl-defmethod eglot-handle-request (server (_method (eql workspace/workspaceFolders))) "Handle server request workspace/workspaceFolders." (eglot-workspace-folders server)) (cl-defmethod eglot-handle-request (_server (_method (eql window/showDocument)) &key uri external takeFocus selection) "Handle request window/showDocument." (let ((success t) (filename)) (cond ((eq external t) (browse-url uri)) ((file-readable-p (setq filename (eglot-uri-to-path uri))) ;; Use run-with-timer to avoid nested client requests like the ;; "synchronous imenu" floated in bug#62116 presumably caused by ;; which-func-mode. (run-with-timer 0 nil (lambda () (with-current-buffer (find-file-noselect filename) (cond (takeFocus (pop-to-buffer (current-buffer)) (select-frame-set-input-focus (selected-frame))) ((display-buffer (current-buffer)))) (when selection (pcase-let ((`(,beg . ,end) (eglot-range-region selection))) ;; FIXME: it is very naughty to use someone else's `--' ;; function, but `xref--goto-char' happens to have ;; exactly the semantics we want vis-a-vis widening. (xref--goto-char beg) (pulse-momentary-highlight-region beg end 'highlight))))))) (t (setq success :json-false))) `(:success ,success))) (defun eglot--TextDocumentIdentifier () "Compute TextDocumentIdentifier object for current buffer. Sets `eglot--TextDocumentIdentifier-cache' (which see) as a side effect." (unless eglot--TextDocumentIdentifier-cache (let ((truename (file-truename (or buffer-file-name (ignore-errors (buffer-file-name (buffer-base-buffer))))))) (setq eglot--TextDocumentIdentifier-cache `(,truename . (:uri ,(eglot-path-to-uri truename :truenamep t)))))) (cdr eglot--TextDocumentIdentifier-cache)) (defvar-local eglot--versioned-identifier 0) (defun eglot--VersionedTextDocumentIdentifier () "Compute VersionedTextDocumentIdentifier object for current buffer." (append (eglot--TextDocumentIdentifier) `(:version ,eglot--versioned-identifier))) (cl-defun eglot--languageId (&optional (server (eglot--current-server-or-lose))) "Compute LSP \\='languageId\\=' string for current buffer. Doubles as an predicate telling if SERVER can manage current buffer." (cl-loop for (mode . languageid) in (eglot--languages server) when (provided-mode-derived-p major-mode mode) return languageid)) (defun eglot--TextDocumentItem () "Compute TextDocumentItem object for current buffer." (append (eglot--VersionedTextDocumentIdentifier) (list :languageId (eglot--languageId) :text (eglot--widening (buffer-substring-no-properties (point-min) (point-max)))))) (defun eglot--TextDocumentPositionParams () "Compute TextDocumentPositionParams." (list :textDocument (eglot--TextDocumentIdentifier) :position (eglot--pos-to-lsp-position))) (defvar-local eglot--last-inserted-char nil "If non-nil, value of the last inserted character in buffer.") (defun eglot--post-self-insert-hook () "Set `eglot--last-inserted-char', maybe call on-type-formatting." (setq eglot--last-inserted-char last-command-event) (let ((ot-provider (eglot-server-capable :documentOnTypeFormattingProvider))) (when (and ot-provider (ignore-errors ; github#906, some LS's send empty strings (or (eq eglot--last-inserted-char (seq-first (plist-get ot-provider :firstTriggerCharacter))) (cl-find eglot--last-inserted-char (plist-get ot-provider :moreTriggerCharacter) :key #'seq-first)))) (eglot-format (point) nil eglot--last-inserted-char)))) (defvar eglot--workspace-symbols-cache (make-hash-table :test #'equal) "Cache of `workspace/Symbol' results used by `xref-find-definitions'.") (defun eglot--pre-command-hook () "Reset some temporary variables." (clrhash eglot--workspace-symbols-cache) (setq eglot--last-inserted-char nil)) (defun eglot--CompletionParams () (append (eglot--TextDocumentPositionParams) `(:context ,(if-let (trigger (and (characterp eglot--last-inserted-char) (cl-find eglot--last-inserted-char (eglot-server-capable :completionProvider :triggerCharacters) :key (lambda (str) (aref str 0)) :test #'char-equal))) `(:triggerKind 2 :triggerCharacter ,trigger) `(:triggerKind 1))))) (defvar-local eglot--recent-changes nil "Recent buffer changes as collected by `eglot--track-changes-fetch'.") (cl-defmethod jsonrpc-connection-ready-p ((_server eglot-lsp-server) _what) "Tell if SERVER is ready for WHAT in current buffer." (and (cl-call-next-method) (not eglot--recent-changes))) (defvar-local eglot--change-idle-timer nil "Idle timer for didChange signals.") (defvar eglot--document-changed-hook '(eglot--signal-textDocument/didChange) "Internal hook for doing things when the document changes.") (defun eglot--track-changes-fetch (id) (if (eq eglot--recent-changes :pending) (setq eglot--recent-changes nil)) (track-changes-fetch id (lambda (beg end before) (cl-incf eglot--versioned-identifier) (cond ((eq eglot--recent-changes :emacs-messup) nil) ((eq before 'error) (setf eglot--recent-changes :emacs-messup)) (t (push `(,(eglot--pos-to-lsp-position beg) ,(eglot--virtual-pos-to-lsp-position beg before) ,(length before) ,(buffer-substring-no-properties beg end)) eglot--recent-changes)))))) (defun eglot--add-one-shot-hook (hook function &optional append local) "Like `add-hook' but calls FUNCTION only once." (let* ((fname (make-symbol (format "eglot--%s-once" function))) (fun (lambda (&rest args) (remove-hook hook fname local) (apply function args)))) (fset fname fun) (add-hook hook fname append local))) (defun eglot--track-changes-signal (id &optional distance) (cond (distance ;; When distance is <100, we may as well coalesce the changes. (when (> distance 100) (eglot--track-changes-fetch id))) (eglot--recent-changes nil) ;; Note that there are pending changes, for the benefit of those ;; who check it as a boolean. (t (setq eglot--recent-changes :pending))) (when eglot--change-idle-timer (cancel-timer eglot--change-idle-timer)) (setq eglot--change-idle-timer (run-with-idle-timer eglot-send-changes-idle-time nil (lambda (buf) (eglot--when-live-buffer buf (when eglot--managed-mode (if (track-changes-inconsistent-state-p) ;; Not a good time (e.g. in the middle of Quail thingy, ;; bug#70541): reschedule for the next idle period. (eglot--add-one-shot-hook 'post-command-hook (lambda () (eglot--when-live-buffer buf (eglot--track-changes-signal id)))) (run-hooks 'eglot--document-changed-hook) (setq eglot--change-idle-timer nil))))) (current-buffer)))) (defvar-local eglot-workspace-configuration () "Configure LSP servers specifically for a given project. This variable's value should be a plist (SECTION VALUE ...). SECTION is a keyword naming a parameter section relevant to a particular server. VALUE is a plist or a primitive type converted to JSON also understood by that server. Instead of a plist, an alist ((SECTION . VALUE) ...) can be used instead, but this variant is less reliable and not recommended. This variable should be set as a directory-local variable. See info node `(emacs)Directory Variables' for various ways to do that. Here's an example value that establishes two sections relevant to the Pylsp and Gopls LSP servers: (:pylsp (:plugins (:jedi_completion (:include_params t :fuzzy t) :pylint (:enabled :json-false))) :gopls (:usePlaceholders t)) The value of this variable can also be a unary function of a single argument, which will be a connected `eglot-lsp-server' instance. The function runs with `default-directory' set to the root of the current project. It should return an object of the format described above.") ;;;###autoload (put 'eglot-workspace-configuration 'safe-local-variable #'listp) (defun eglot-show-workspace-configuration (&optional server) "Dump `eglot-workspace-configuration' as JSON for debugging." (interactive (list (eglot--read-server "Show workspace configuration for" t))) (let ((conf (eglot--workspace-configuration-plist server))) (with-current-buffer (get-buffer-create "*EGLOT workspace configuration*") (erase-buffer) (insert (jsonrpc--json-encode conf)) (with-no-warnings (require 'json) (when (require 'json-mode nil t) (json-mode)) (json-pretty-print-buffer)) (pop-to-buffer (current-buffer))))) (defun eglot--workspace-configuration-plist (server &optional path) "Returns SERVER's workspace configuration as a plist. If PATH consider that file's `file-name-directory' to get the local value of the `eglot-workspace-configuration' variable, else use the root of SERVER's `eglot--project'." (let ((val (with-temp-buffer (setq default-directory ;; See github#1281 (if path (if (file-directory-p path) (file-name-as-directory path) (file-name-directory path)) (project-root (eglot--project server)))) ;; Set the major mode to be the first of the managed ;; modes. This is the one the user started eglot in. (setq major-mode (car (eglot--major-modes server))) (hack-dir-local-variables-non-file-buffer) (if (functionp eglot-workspace-configuration) (funcall eglot-workspace-configuration server) eglot-workspace-configuration)))) (or (and (consp (car val)) (cl-loop for (section . v) in val collect (if (keywordp section) section (intern (format ":%s" section))) collect v)) val))) (defun eglot-signal-didChangeConfiguration (server) "Send a `:workspace/didChangeConfiguration' signal to SERVER. When called interactively, use the currently active server" (interactive (list (eglot--current-server-or-lose))) (jsonrpc-notify server :workspace/didChangeConfiguration (list :settings (or (eglot--workspace-configuration-plist server) eglot--{})))) (cl-defmethod eglot-handle-request (server (_method (eql workspace/configuration)) &key items) "Handle server request workspace/configuration." (apply #'vector (mapcar (eglot--lambda ((ConfigurationItem) scopeUri section) (cl-loop with scope-uri-path = (and scopeUri (eglot-uri-to-path scopeUri)) for (wsection o) on (eglot--workspace-configuration-plist server scope-uri-path) by #'cddr when (string= (if (keywordp wsection) (substring (symbol-name wsection) 1) wsection) section) return o)) items))) (defun eglot--signal-textDocument/didChange () "Send textDocument/didChange to server." (eglot--track-changes-fetch eglot--track-changes) (when eglot--recent-changes (let* ((server (eglot--current-server-or-lose)) (sync-capability (eglot-server-capable :textDocumentSync)) (sync-kind (if (numberp sync-capability) sync-capability (plist-get sync-capability :change))) (full-sync-p (or (eq sync-kind 1) (eq :emacs-messup eglot--recent-changes)))) (jsonrpc-notify server :textDocument/didChange (list :textDocument (eglot--VersionedTextDocumentIdentifier) :contentChanges (if full-sync-p (vector `(:text ,(eglot--widening (buffer-substring-no-properties (point-min) (point-max))))) (cl-loop for (beg end len text) in (reverse eglot--recent-changes) vconcat `[,(list :range `(:start ,beg :end ,end) :rangeLength len :text text)])))) (setq eglot--recent-changes nil) (jsonrpc--call-deferred server)))) (defun eglot--signal-textDocument/didOpen () "Send textDocument/didOpen to server." (setq eglot--recent-changes nil eglot--versioned-identifier 0 eglot--TextDocumentIdentifier-cache nil) (jsonrpc-notify (eglot--current-server-or-lose) :textDocument/didOpen `(:textDocument ,(eglot--TextDocumentItem)))) (defun eglot--signal-textDocument/didClose () "Send textDocument/didClose to server." (with-demoted-errors "[eglot] error sending textDocument/didClose: %s" (jsonrpc-notify (eglot--current-server-or-lose) :textDocument/didClose `(:textDocument ,(eglot--TextDocumentIdentifier))))) (defun eglot--signal-textDocument/willSave () "Maybe send textDocument/willSave to server." (let ((server (eglot--current-server-or-lose)) (params `(:reason 1 :textDocument ,(eglot--TextDocumentIdentifier)))) (when (eglot-server-capable :textDocumentSync :willSave) (jsonrpc-notify server :textDocument/willSave params)) (when (eglot-server-capable :textDocumentSync :willSaveWaitUntil) (ignore-errors (eglot--apply-text-edits (eglot--request server :textDocument/willSaveWaitUntil params :timeout 0.5)))))) (defun eglot--signal-textDocument/didSave () "Maybe send textDocument/didSave to server." (eglot--signal-textDocument/didChange) (when (eglot-server-capable :textDocumentSync :save) (jsonrpc-notify (eglot--current-server-or-lose) :textDocument/didSave (list ;; TODO: Handle TextDocumentSaveRegistrationOptions to control this. :text (buffer-substring-no-properties (point-min) (point-max)) :textDocument (eglot--TextDocumentIdentifier))))) (defun eglot-flymake-backend (report-fn &rest _more) "A Flymake backend for Eglot. Calls REPORT-FN (or arranges for it to be called) when the server publishes diagnostics. Between calls to this function, REPORT-FN may be called multiple times (respecting the protocol of `flymake-diagnostic-functions')." (cond (eglot--managed-mode (setq eglot--current-flymake-report-fn report-fn) (eglot--report-to-flymake eglot--diagnostics)) (t (funcall report-fn nil)))) (defun eglot--report-to-flymake (diags) "Internal helper for `eglot-flymake-backend'." (save-restriction (widen) (funcall eglot--current-flymake-report-fn diags ;; If the buffer hasn't changed since last ;; call to the report function, flymake won't ;; delete old diagnostics. Using :region ;; keyword forces flymake to delete ;; them (github#159). :region (cons (point-min) (point-max)))) (setq eglot--diagnostics diags)) (defun eglot-xref-backend () "Eglot xref backend." 'eglot) (defvar eglot--temp-location-buffers (make-hash-table :test #'equal) "Helper variable for `eglot--collecting-xrefs'.") (defvar eglot-xref-lessp-function #'ignore "Compare two `xref-item' objects for sorting.") (cl-defmacro eglot--collecting-xrefs ((collector) &rest body) "Sort and handle xrefs collected with COLLECTOR in BODY." (declare (indent 1) (debug (sexp &rest form))) (let ((collected (cl-gensym "collected"))) `(unwind-protect (let (,collected) (cl-flet ((,collector (xref) (push xref ,collected))) ,@body) (setq ,collected (nreverse ,collected)) (sort ,collected eglot-xref-lessp-function)) (maphash (lambda (_uri buf) (kill-buffer buf)) eglot--temp-location-buffers) (clrhash eglot--temp-location-buffers)))) (defun eglot--xref-make-match (name uri range) "Like `xref-make-match' but with LSP's NAME, URI and RANGE. Try to visit the target file for a richer summary line." (pcase-let* ((file (eglot-uri-to-path uri)) (visiting (or (find-buffer-visiting file) (gethash uri eglot--temp-location-buffers))) (collect (lambda () (eglot--widening (pcase-let* ((`(,beg . ,end) (eglot-range-region range)) (bol (progn (goto-char beg) (eglot--bol))) (substring (buffer-substring bol (line-end-position))) (hi-beg (- beg bol)) (hi-end (- (min (line-end-position) end) bol))) (add-face-text-property hi-beg hi-end 'xref-match t substring) (list substring (line-number-at-pos (point) t) (eglot-utf-32-linepos) (- end beg)))))) (`(,summary ,line ,column ,length) (cond (visiting (with-current-buffer visiting (funcall collect))) ((file-readable-p file) (with-current-buffer (puthash uri (generate-new-buffer " *temp*") eglot--temp-location-buffers) (insert-file-contents file) (funcall collect))) (t ;; fall back to the "dumb strategy" (let* ((start (cl-getf range :start)) (line (1+ (cl-getf start :line))) (start-pos (cl-getf start :character)) (end-pos (cl-getf (cl-getf range :end) :character))) (list name line start-pos (- end-pos start-pos))))))) (setf (gethash (expand-file-name file) eglot--servers-by-xrefed-file) (eglot--current-server-or-lose)) (xref-make-match summary (xref-make-file-location file line column) length))) (defun eglot--workspace-symbols (pat &optional buffer) "Ask for :workspace/symbol on PAT, return list of formatted strings. If BUFFER, switch to it before." (with-current-buffer (or buffer (current-buffer)) (eglot-server-capable-or-lose :workspaceSymbolProvider) (mapcar (lambda (wss) (eglot--dbind ((WorkspaceSymbol) name containerName kind) wss (propertize (format "%s%s %s" (if (zerop (length containerName)) "" (concat (propertize containerName 'face 'shadow) " ")) name (propertize (alist-get kind eglot--symbol-kind-names "Unknown") 'face 'shadow)) 'eglot--lsp-workspaceSymbol wss))) (eglot--request (eglot--current-server-or-lose) :workspace/symbol `(:query ,pat))))) (cl-defmethod xref-backend-identifier-completion-table ((_backend (eql eglot))) "Yet another tricky connection between LSP and Elisp completion semantics." (let ((buf (current-buffer)) (cache eglot--workspace-symbols-cache)) (cl-labels ((refresh (pat) (eglot--workspace-symbols pat buf)) (lookup-1 (pat) ;; check cache, else refresh (let ((probe (gethash pat cache :missing))) (if (eq probe :missing) (puthash pat (refresh pat) cache) probe))) (lookup (pat _point) (let ((res (lookup-1 pat)) (def (and (string= pat "") (gethash :default cache)))) (append def res nil))) (score (c) (cl-getf (get-text-property 0 'eglot--lsp-workspaceSymbol c) :score 0))) (external-completion-table 'eglot-indirection-joy #'lookup `((cycle-sort-function . ,(lambda (completions) (cl-sort completions #'> :key #'score)))))))) (defun eglot--recover-workspace-symbol-meta (string) "Search `eglot--workspace-symbols-cache' for rich entry of STRING." (catch 'found (maphash (lambda (_k v) (while (consp v) ;; Like mess? Ask minibuffer.el about improper lists. (when (equal (car v) string) (throw 'found (car v))) (setq v (cdr v)))) eglot--workspace-symbols-cache))) (cl-defmethod xref-backend-identifier-at-point ((_backend (eql eglot))) (let ((attempt (and (xref--prompt-p this-command) (puthash :default (ignore-errors (eglot--workspace-symbols (symbol-name (symbol-at-point)))) eglot--workspace-symbols-cache)))) (if attempt (car attempt) "LSP identifier at point"))) (defvar eglot--lsp-xref-refs nil "`xref' objects for overriding `xref-backend-references''s.") (cl-defun eglot--lsp-xrefs-for-method (method &key extra-params capability) "Make `xref''s for METHOD, EXTRA-PARAMS, check CAPABILITY." (eglot-server-capable-or-lose (or capability (intern (format ":%sProvider" (cadr (split-string (symbol-name method) "/")))))) (let ((response (eglot--request (eglot--current-server-or-lose) method (append (eglot--TextDocumentPositionParams) extra-params)))) (eglot--collecting-xrefs (collect) (mapc (lambda (loc-or-loc-link) (let ((sym-name (symbol-name (symbol-at-point)))) (eglot--dcase loc-or-loc-link (((LocationLink) targetUri targetSelectionRange) (collect (eglot--xref-make-match sym-name targetUri targetSelectionRange))) (((Location) uri range) (collect (eglot--xref-make-match sym-name uri range)))))) (if (vectorp response) response (and response (list response))))))) (cl-defun eglot--lsp-xref-helper (method &key extra-params capability) "Helper for `eglot-find-declaration' & friends." (let ((eglot--lsp-xref-refs (eglot--lsp-xrefs-for-method method :extra-params extra-params :capability capability))) (if eglot--lsp-xref-refs (xref-find-references "LSP identifier at point.") (eglot--message "%s returned no references" method)))) (defun eglot-find-declaration () "Find declaration for SYM, the identifier at point." (interactive) (eglot--lsp-xref-helper :textDocument/declaration)) (defun eglot-find-implementation () "Find implementation for SYM, the identifier at point." (interactive) (eglot--lsp-xref-helper :textDocument/implementation)) (defun eglot-find-typeDefinition () "Find type definition for SYM, the identifier at point." (interactive) (eglot--lsp-xref-helper :textDocument/typeDefinition)) (cl-defmethod xref-backend-definitions ((_backend (eql eglot)) id) (let ((probe (eglot--recover-workspace-symbol-meta id))) (if probe (eglot--dbind ((WorkspaceSymbol) name location) (get-text-property 0 'eglot--lsp-workspaceSymbol probe) (eglot--dbind ((Location) uri range) location (list (eglot--xref-make-match name uri range)))) (eglot--lsp-xrefs-for-method :textDocument/definition)))) (cl-defmethod xref-backend-references ((_backend (eql eglot)) _identifier) (or eglot--lsp-xref-refs (eglot--lsp-xrefs-for-method :textDocument/references :extra-params `(:context (:includeDeclaration t))))) (cl-defmethod xref-backend-apropos ((_backend (eql eglot)) pattern) (when (eglot-server-capable :workspaceSymbolProvider) (eglot--collecting-xrefs (collect) (mapc (eglot--lambda ((SymbolInformation) name location) (eglot--dbind ((Location) uri range) location (collect (eglot--xref-make-match name uri range)))) (eglot--request (eglot--current-server-or-lose) :workspace/symbol `(:query ,pattern)))))) (defun eglot-format-buffer () "Format contents of current buffer." (interactive) (eglot-format nil nil)) (defun eglot-format (&optional beg end on-type-format) "Format region BEG END. If either BEG or END is nil, format entire buffer. Interactively, format active region, or entire buffer if region is not active. If non-nil, ON-TYPE-FORMAT is a character just inserted at BEG for which LSP on-type-formatting should be requested." (interactive (and (region-active-p) (list (region-beginning) (region-end)))) (pcase-let ((`(,method ,cap ,args) (cond ((and beg on-type-format) `(:textDocument/onTypeFormatting :documentOnTypeFormattingProvider ,`(:position ,(eglot--pos-to-lsp-position beg) :ch ,(string on-type-format)))) ((and beg end) `(:textDocument/rangeFormatting :documentRangeFormattingProvider (:range ,(list :start (eglot--pos-to-lsp-position beg) :end (eglot--pos-to-lsp-position end))))) (t '(:textDocument/formatting :documentFormattingProvider nil))))) (eglot-server-capable-or-lose cap) (eglot--apply-text-edits (eglot--request (eglot--current-server-or-lose) method (cl-list* :textDocument (eglot--TextDocumentIdentifier) :options (list :tabSize tab-width :insertSpaces (if indent-tabs-mode :json-false t) :insertFinalNewline (if require-final-newline t :json-false) :trimFinalNewlines (if delete-trailing-lines t :json-false)) args)) nil on-type-format))) (defvar eglot-cache-session-completions t "If non-nil Eglot caches data during completion sessions.") (defvar eglot--capf-session :none "A cache used by `eglot-completion-at-point'.") (defun eglot--capf-session-flush (&optional _) (setq eglot--capf-session :none)) (defun eglot--dumb-flex (pat comp ignorecase) "Return destructively fontified COMP iff PAT matches it." (cl-loop with lcomp = (length comp) with case-fold-search = ignorecase initially (remove-list-of-text-properties 0 lcomp '(face) comp) for x across pat for i = (cl-loop for j from (if i (1+ i) 0) below lcomp when (char-equal x (aref comp j)) return j) unless i do (cl-return nil) ;; FIXME: could do much better here and coalesce intervals do (add-face-text-property i (1+ i) 'completions-common-part nil comp) finally (cl-return comp))) (defun eglot--dumb-allc (pat table pred _point) (funcall table pat pred t)) (defun eglot--dumb-tryc (pat table pred point) (let ((probe (funcall table pat pred nil))) (cond ((eq probe t) t) (probe (cons probe (length probe))) (t (cons pat point))))) (add-to-list 'completion-category-defaults '(eglot-capf (styles eglot--dumb-flex))) (add-to-list 'completion-styles-alist '(eglot--dumb-flex eglot--dumb-tryc eglot--dumb-allc)) (defun eglot-completion-at-point () "Eglot's `completion-at-point' function." ;; Commit logs for this function help understand what's going on. (when-let (completion-capability (eglot-server-capable :completionProvider)) (let* ((server (eglot--current-server-or-lose)) (bounds (or (bounds-of-thing-at-point 'symbol) (cons (point) (point)))) (bounds-string (buffer-substring (car bounds) (cdr bounds))) (sort-completions (lambda (completions) (cl-sort completions #'string-lessp :key (lambda (c) (plist-get (get-text-property 0 'eglot--lsp-item c) :sortText))))) (metadata `(metadata (category . eglot-capf) (display-sort-function . ,sort-completions))) (local-cache :none) (orig-pos (point)) (resolved (make-hash-table)) (proxies (lambda () (if (listp local-cache) local-cache (let* ((resp (eglot--request server :textDocument/completion (eglot--CompletionParams) :cancel-on-input t)) (items (append (if (vectorp resp) resp (plist-get resp :items)) nil)) (cachep (and (listp resp) items eglot-cache-session-completions (eq (plist-get resp :isIncomplete) :json-false))) (retval (mapcar (jsonrpc-lambda (&rest item &key label insertText insertTextFormat textEdit &allow-other-keys) (let ((proxy ;; Snippet or textEdit, it's safe to ;; display/insert the label since ;; it'll be adjusted. If no usable ;; insertText at all, label is best, ;; too. (cond ((or (eql insertTextFormat 2) textEdit (null insertText) (string-empty-p insertText)) (string-trim-left label)) (t insertText)))) (unless (zerop (length proxy)) (put-text-property 0 1 'eglot--lsp-item item proxy)) proxy)) items))) ;; (trace-values "Requested" (length proxies) cachep bounds) (setq eglot--capf-session (if cachep (list bounds retval resolved orig-pos bounds-string) :none)) (setq local-cache retval))))) (resolve-maybe ;; Maybe completion/resolve JSON object `lsp-comp' into ;; another JSON object, if at all possible. Otherwise, ;; just return lsp-comp. (lambda (lsp-comp) (or (gethash lsp-comp resolved) (setf (gethash lsp-comp resolved) (if (and (eglot-server-capable :completionProvider :resolveProvider) (plist-get lsp-comp :data)) (eglot--request server :completionItem/resolve lsp-comp :cancel-on-input t) lsp-comp)))))) (when (and (consp eglot--capf-session) (= (car bounds) (car (nth 0 eglot--capf-session))) (>= (cdr bounds) (cdr (nth 0 eglot--capf-session)))) (setq local-cache (nth 1 eglot--capf-session) resolved (nth 2 eglot--capf-session) orig-pos (nth 3 eglot--capf-session) bounds-string (nth 4 eglot--capf-session)) ;; (trace-values "Recalling cache" (length local-cache) bounds orig-pos) ) (list (car bounds) (cdr bounds) (lambda (pattern pred action) (cond ((eq action 'metadata) metadata) ; metadata ((eq action 'lambda) ; test-completion (test-completion pattern (funcall proxies))) ((eq (car-safe action) 'boundaries) nil) ; boundaries ((null action) ; try-completion (try-completion pattern (funcall proxies))) ((eq action t) ; all-completions (let ((comps (funcall proxies))) (dolist (c comps) (eglot--dumb-flex pattern c t)) (all-completions "" comps (lambda (proxy) (let* ((item (get-text-property 0 'eglot--lsp-item proxy)) (filterText (plist-get item :filterText))) (and (or (null pred) (funcall pred proxy)) (eglot--dumb-flex pattern (or filterText proxy) completion-ignore-case))))))))) :annotation-function (lambda (proxy) (eglot--dbind ((CompletionItem) detail kind) (get-text-property 0 'eglot--lsp-item proxy) (let* ((detail (and (stringp detail) (not (string= detail "")) detail)) (annotation (or detail (cdr (assoc kind eglot--kind-names))))) (when annotation (concat " " (propertize annotation 'face 'font-lock-function-name-face)))))) :company-kind ;; Associate each lsp-item with a lsp-kind symbol. (lambda (proxy) (when-let* ((lsp-item (get-text-property 0 'eglot--lsp-item proxy)) (kind (alist-get (plist-get lsp-item :kind) eglot--kind-names))) (pcase kind ("EnumMember" 'enum-member) ("TypeParameter" 'type-parameter) (_ (intern (downcase kind)))))) :company-deprecated (lambda (proxy) (when-let ((lsp-item (get-text-property 0 'eglot--lsp-item proxy))) (or (seq-contains-p (plist-get lsp-item :tags) 1) (eq t (plist-get lsp-item :deprecated))))) :company-docsig ;; FIXME: autoImportText is specific to the pyright language server (lambda (proxy) (when-let* ((lsp-comp (get-text-property 0 'eglot--lsp-item proxy)) (data (plist-get (funcall resolve-maybe lsp-comp) :data)) (import-text (plist-get data :autoImportText))) import-text)) :company-doc-buffer (lambda (proxy) (let* ((documentation (let ((lsp-comp (get-text-property 0 'eglot--lsp-item proxy))) (plist-get (funcall resolve-maybe lsp-comp) :documentation))) (formatted (and documentation (eglot--format-markup documentation)))) (when formatted (with-current-buffer (get-buffer-create " *eglot doc*") (erase-buffer) (insert formatted) (current-buffer))))) :company-require-match 'never :company-prefix-length (save-excursion (goto-char (car bounds)) (when (listp completion-capability) (looking-back (regexp-opt (cl-coerce (cl-getf completion-capability :triggerCharacters) 'list)) (eglot--bol)))) :exit-function (lambda (proxy status) (eglot--capf-session-flush) (when (memq status '(finished exact)) ;; To assist in using this whole `completion-at-point' ;; function inside `completion-in-region', ensure the exit ;; function runs in the buffer where the completion was ;; triggered from. This should probably be in Emacs itself. ;; (github#505) (with-current-buffer (if (minibufferp) (window-buffer (minibuffer-selected-window)) (current-buffer)) (eglot--dbind ((CompletionItem) insertTextFormat insertText textEdit additionalTextEdits label) (funcall resolve-maybe (or (get-text-property 0 'eglot--lsp-item proxy) ;; When selecting from the *Completions* ;; buffer, `proxy' won't have any properties. ;; A lookup should fix that (github#148) (get-text-property 0 'eglot--lsp-item (cl-find proxy (funcall proxies) :test #'string=)))) (let ((snippet-fn (and (eql insertTextFormat 2) (eglot--snippet-expansion-fn)))) (cond (textEdit ;; Revert buffer back to state when the edit ;; was obtained from server. If a `proxy' ;; "bar" was obtained from a buffer with ;; "foo.b", the LSP edit applies to that ;; state, _not_ the current "foo.bar". (delete-region orig-pos (point)) (insert (substring bounds-string (- orig-pos (car bounds)))) (eglot--dbind ((TextEdit) range newText) textEdit (pcase-let ((`(,beg . ,end) (eglot-range-region range))) (delete-region beg end) (goto-char beg) (funcall (or snippet-fn #'insert) newText)))) (snippet-fn ;; A snippet should be inserted, but using plain ;; `insertText'. This requires us to delete the ;; whole completion, since `insertText' is the full ;; completion's text. (delete-region (- (point) (length proxy)) (point)) (funcall snippet-fn (or insertText label)))) (when (cl-plusp (length additionalTextEdits)) (eglot--apply-text-edits additionalTextEdits))) (eglot--signal-textDocument/didChange))))))))) (defun eglot--hover-info (contents &optional _range) (mapconcat #'eglot--format-markup (if (vectorp contents) contents (list contents)) "\n")) (defun eglot--sig-info (sig &optional sig-active briefp) (eglot--dbind ((SignatureInformation) ((:label siglabel)) ((:documentation sigdoc)) parameters activeParameter) sig (with-temp-buffer (insert siglabel) ;; Add documentation, indented so we can distinguish multiple signatures (when-let (doc (and (not briefp) sigdoc (eglot--format-markup sigdoc))) (goto-char (point-max)) (insert "\n" (replace-regexp-in-string "^" " " doc))) ;; Try to highlight function name only (let (first-parlabel) (cond ((and (cl-plusp (length parameters)) (vectorp (setq first-parlabel (plist-get (aref parameters 0) :label)))) (save-excursion (goto-char (elt first-parlabel 0)) (skip-syntax-backward "^w") (add-face-text-property (point-min) (point) 'font-lock-function-name-face))) ((save-excursion (goto-char (point-min)) (looking-at "\\([^(]*\\)([^)]*)")) (add-face-text-property (match-beginning 1) (match-end 1) 'font-lock-function-name-face)))) ;; Now to the parameters (cl-loop with active-param = (or sig-active activeParameter) for i from 0 for parameter across parameters do (eglot--dbind ((ParameterInformation) ((:label parlabel)) ((:documentation pardoc))) parameter ;; ...perhaps highlight it in the formals list (when (eq i active-param) (save-excursion (goto-char (point-min)) (pcase-let ((`(,beg ,end) (if (stringp parlabel) (let ((case-fold-search nil)) (and (search-forward parlabel (line-end-position) t) (list (match-beginning 0) (match-end 0)))) (mapcar #'1+ (append parlabel nil))))) (if (and beg end) (add-face-text-property beg end 'eldoc-highlight-function-argument))))) ;; ...and/or maybe add its doc on a line by its own. (let (fpardoc) (when (and pardoc (not briefp) (not (string-empty-p (setq fpardoc (eglot--format-markup pardoc))))) (insert "\n " (propertize (if (stringp parlabel) parlabel (apply #'substring siglabel (mapcar #'1+ parlabel))) 'face (and (eq i active-param) 'eldoc-highlight-function-argument)) ": " fpardoc))))) (buffer-string)))) (defun eglot-signature-eldoc-function (cb) "A member of `eldoc-documentation-functions', for signatures." (when (eglot-server-capable :signatureHelpProvider) (let ((buf (current-buffer))) (jsonrpc-async-request (eglot--current-server-or-lose) :textDocument/signatureHelp (eglot--TextDocumentPositionParams) :success-fn (eglot--lambda ((SignatureHelp) signatures activeSignature (activeParameter 0)) (eglot--when-buffer-window buf (let ((active-sig (and (cl-plusp (length signatures)) (aref signatures (or activeSignature 0))))) (if (not active-sig) (funcall cb nil) (funcall cb (mapconcat (lambda (s) (eglot--sig-info s (and (eq s active-sig) activeParameter) nil)) signatures "\n") :echo (eglot--sig-info active-sig activeParameter t)))))) :deferred :textDocument/signatureHelp)) t)) (defun eglot-hover-eldoc-function (cb) "A member of `eldoc-documentation-functions', for hover." (when (eglot-server-capable :hoverProvider) (let ((buf (current-buffer))) (jsonrpc-async-request (eglot--current-server-or-lose) :textDocument/hover (eglot--TextDocumentPositionParams) :success-fn (eglot--lambda ((Hover) contents range) (eglot--when-buffer-window buf (let ((info (unless (seq-empty-p contents) (eglot--hover-info contents range)))) (funcall cb info :echo (and info (string-match "\n" info)))))) :deferred :textDocument/hover)) (eglot--highlight-piggyback cb) t)) (defvar eglot--highlights nil "Overlays for textDocument/documentHighlight.") (defun eglot--highlight-piggyback (_cb) "Request and handle `:textDocument/documentHighlight'." ;; FIXME: Obviously, this is just piggy backing on eldoc's calls for ;; convenience, as shown by the fact that we just ignore cb. (let ((buf (current-buffer))) (when (eglot-server-capable :documentHighlightProvider) (jsonrpc-async-request (eglot--current-server-or-lose) :textDocument/documentHighlight (eglot--TextDocumentPositionParams) :success-fn (lambda (highlights) (mapc #'delete-overlay eglot--highlights) (setq eglot--highlights (eglot--when-buffer-window buf (mapcar (eglot--lambda ((DocumentHighlight) range) (pcase-let ((`(,beg . ,end) (eglot-range-region range))) (let ((ov (make-overlay beg end))) (overlay-put ov 'face 'eglot-highlight-symbol-face) (overlay-put ov 'modification-hooks `(,(lambda (o &rest _) (delete-overlay o)))) ov))) highlights)))) :deferred :textDocument/documentHighlight) nil))) (defun eglot--imenu-SymbolInformation (res) "Compute `imenu--index-alist' for RES vector of SymbolInformation." (mapcar (pcase-lambda (`(,kind . ,objs)) (cons (alist-get kind eglot--symbol-kind-names "Unknown") (mapcan (pcase-lambda (`(,container . ,objs)) (let ((elems (mapcar (eglot--lambda ((SymbolInformation) kind name location) (let ((reg (eglot-range-region (plist-get location :range))) (kind (alist-get kind eglot--symbol-kind-names))) (cons (propertize name 'breadcrumb-region reg 'breadcrumb-kind kind) (car reg)))) objs))) (if container (list (cons container elems)) elems))) (seq-group-by (eglot--lambda ((SymbolInformation) containerName) containerName) objs)))) (seq-group-by (eglot--lambda ((SymbolInformation) kind) kind) res))) (defun eglot--imenu-DocumentSymbol (res) "Compute `imenu--index-alist' for RES vector of DocumentSymbol." (cl-labels ((dfs (&key name children range kind &allow-other-keys) (let* ((reg (eglot-range-region range)) (kind (alist-get kind eglot--symbol-kind-names)) (name (propertize name 'breadcrumb-region reg 'breadcrumb-kind kind))) (if (seq-empty-p children) (cons name (car reg)) (cons name (mapcar (lambda (c) (apply #'dfs c)) children)))))) (mapcar (lambda (s) (apply #'dfs s)) res))) (cl-defun eglot-imenu () "Eglot's `imenu-create-index-function'. Returns a list as described in docstring of `imenu--index-alist'." (unless (eglot-server-capable :documentSymbolProvider) (cl-return-from eglot-imenu)) (let* ((res (eglot--request (eglot--current-server-or-lose) :textDocument/documentSymbol `(:textDocument ,(eglot--TextDocumentIdentifier)) :cancel-on-input non-essential)) (head (and (cl-plusp (length res)) (elt res 0)))) (when head (eglot--dcase head (((SymbolInformation)) (eglot--imenu-SymbolInformation res)) (((DocumentSymbol)) (eglot--imenu-DocumentSymbol res)))))) (cl-defun eglot--apply-text-edits (edits &optional version silent) "Apply EDITS for current buffer if at VERSION, or if it's nil. If SILENT, don't echo progress in mode-line." (unless edits (cl-return-from eglot--apply-text-edits)) (unless (or (not version) (equal version eglot--versioned-identifier)) (jsonrpc-error "Edits on `%s' require version %d, you have %d" (current-buffer) version eglot--versioned-identifier)) (atomic-change-group (let* ((change-group (prepare-change-group)) (howmany (length edits)) (reporter (unless silent (make-progress-reporter (format "[eglot] applying %s edits to `%s'..." howmany (current-buffer)) 0 howmany))) (done 0)) (mapc (pcase-lambda (`(,newText ,beg . ,end)) (let ((source (current-buffer))) (with-temp-buffer (insert newText) (let ((temp (current-buffer))) (with-current-buffer source (save-excursion (save-restriction (narrow-to-region beg end) (replace-buffer-contents temp))) (when reporter (eglot--reporter-update reporter (cl-incf done)))))))) (mapcar (eglot--lambda ((TextEdit) range newText) (cons newText (eglot-range-region range 'markers))) (reverse edits))) (undo-amalgamate-change-group change-group) (when reporter (progress-reporter-done reporter))))) (defun eglot--confirm-server-edits (origin _prepared) "Helper for `eglot--apply-workspace-edit. ORIGIN is a symbol designating a command. Reads the `eglot-confirm-server-edits' user option and returns a symbol like `diff', `summary' or nil." (let (v) (cond ((symbolp eglot-confirm-server-edits) eglot-confirm-server-edits) ((setq v (assoc origin eglot-confirm-server-edits)) (cdr v)) ((setq v (assoc t eglot-confirm-server-edits)) (cdr v))))) (defun eglot--propose-changes-as-diff (prepared) "Helper for `eglot--apply-workspace-edit'. Goal is to popup a `diff-mode' buffer containing all the changes of PREPARED, ready to apply with C-c C-a. PREPARED is a list ((FILENAME EDITS VERSION)...)." (with-current-buffer (get-buffer-create "*EGLOT proposed server changes*") (buffer-disable-undo (current-buffer)) (let ((inhibit-read-only t) (target (current-buffer))) (diff-mode) (erase-buffer) (pcase-dolist (`(,path ,edits ,_) prepared) (with-temp-buffer (let* ((diff (current-buffer)) (existing-buf (find-buffer-visiting path)) (existing-buf-label (prin1-to-string existing-buf))) (with-temp-buffer (if existing-buf (insert-buffer-substring existing-buf) (insert-file-contents path)) (eglot--apply-text-edits edits nil t) (diff-no-select (or existing-buf path) (current-buffer) nil t diff) (when existing-buf ;; Here we have to pretend the label of the unsaved ;; buffer is the actual file, just so that we can ;; diff-apply without troubles. If there's a better ;; way, it probably involves changes to `diff.el'. (with-current-buffer diff (goto-char (point-min)) (while (search-forward existing-buf-label nil t) (replace-match (buffer-file-name existing-buf)))))) (with-current-buffer target (insert-buffer-substring diff)))))) (setq-local buffer-read-only t) (buffer-enable-undo (current-buffer)) (goto-char (point-min)) (pop-to-buffer (current-buffer)) (font-lock-ensure))) (defun eglot--apply-workspace-edit (wedit origin) "Apply (or offer to apply) the workspace edit WEDIT. ORIGIN is a symbol designating the command that originated this edit proposed by the server." (eglot--dbind ((WorkspaceEdit) changes documentChanges) wedit (let ((prepared (mapcar (eglot--lambda ((TextDocumentEdit) textDocument edits) (eglot--dbind ((VersionedTextDocumentIdentifier) uri version) textDocument (list (eglot-uri-to-path uri) edits version))) documentChanges))) (unless (and changes documentChanges) ;; We don't want double edits, and some servers send both ;; changes and documentChanges. This unless ensures that we ;; prefer documentChanges over changes. (cl-loop for (uri edits) on changes by #'cddr do (push (list (eglot-uri-to-path uri) edits) prepared))) (cl-flet ((notevery-visited-p () (cl-notevery #'find-buffer-visiting (mapcar #'car prepared))) (accept-p () (y-or-n-p (format "[eglot] Server wants to edit:\n%sProceed? " (cl-loop for (f eds _) in prepared concat (format " %s (%d change%s)\n" f (length eds) (if (> (length eds) 1) "s" "")))))) (apply () (cl-loop for edit in prepared for (path edits version) = edit do (with-current-buffer (find-file-noselect path) (eglot--apply-text-edits edits version)) finally (eldoc) (eglot--message "Edit successful!")))) (let ((decision (eglot--confirm-server-edits origin prepared))) (cond ((or (eq decision 'diff) (and (eq decision 'maybe-diff) (notevery-visited-p))) (eglot--propose-changes-as-diff prepared)) ((or (memq decision '(t summary)) (and (eq decision 'maybe-summary) (notevery-visited-p))) (when (accept-p) (apply))) (t (apply)))))))) (defun eglot-rename (newname) "Rename the current symbol to NEWNAME." (interactive (list (read-from-minibuffer (format "Rename `%s' to: " (or (thing-at-point 'symbol t) "unknown symbol")) nil nil nil nil (symbol-name (symbol-at-point))))) (eglot-server-capable-or-lose :renameProvider) (eglot--apply-workspace-edit (eglot--request (eglot--current-server-or-lose) :textDocument/rename `(,@(eglot--TextDocumentPositionParams) :newName ,newname)) this-command)) (defun eglot--code-action-bounds () "Calculate appropriate bounds depending on region and point." (let (diags boftap) (cond ((use-region-p) `(,(region-beginning) ,(region-end))) ((setq diags (flymake-diagnostics (point))) (cl-loop for d in diags minimizing (flymake-diagnostic-beg d) into beg maximizing (flymake-diagnostic-end d) into end finally (cl-return (list beg end)))) ((setq boftap (bounds-of-thing-at-point 'sexp)) (list (car boftap) (cdr boftap))) (t (list (point) (point)))))) (defun eglot-code-actions (beg &optional end action-kind interactive) "Find LSP code actions of type ACTION-KIND between BEG and END. Interactively, offer to execute them. If ACTION-KIND is nil, consider all kinds of actions. Interactively, default BEG and END to region's bounds else BEG is point and END is nil, which results in a request for code actions at point. With prefix argument, prompt for ACTION-KIND." (interactive `(,@(eglot--code-action-bounds) ,(and current-prefix-arg (completing-read "[eglot] Action kind: " '("quickfix" "refactor.extract" "refactor.inline" "refactor.rewrite" "source.organizeImports"))) t)) (eglot-server-capable-or-lose :codeActionProvider) (let* ((server (eglot--current-server-or-lose)) (actions (eglot--request server :textDocument/codeAction (list :textDocument (eglot--TextDocumentIdentifier) :range (list :start (eglot--pos-to-lsp-position beg) :end (eglot--pos-to-lsp-position end)) :context `(:diagnostics [,@(cl-loop for diag in (flymake-diagnostics beg end) when (cdr (assoc 'eglot-lsp-diag (eglot--diag-data diag))) collect it)] ,@(when action-kind `(:only [,action-kind])))))) ;; Redo filtering, in case the `:only' didn't go through. (actions (cl-loop for a across actions when (or (not action-kind) ;; github#847 (string-prefix-p action-kind (plist-get a :kind))) collect a))) (if interactive (eglot--read-execute-code-action actions server action-kind) actions))) (defalias 'eglot-code-actions-at-mouse (eglot--mouse-call 'eglot-code-actions) "Like `eglot-code-actions', but intended for mouse events.") (defun eglot--read-execute-code-action (actions server &optional action-kind) "Helper for interactive calls to `eglot-code-actions'." (let* ((menu-items (or (cl-loop for a in actions collect (cons (plist-get a :title) a)) (apply #'eglot--error (if action-kind `("No \"%s\" code actions here" ,action-kind) `("No code actions here"))))) (preferred-action (cl-find-if (lambda (menu-item) (plist-get (cdr menu-item) :isPreferred)) menu-items)) (default-action (car (or preferred-action (car menu-items)))) (chosen (if (and action-kind (null (cadr menu-items))) (cdr (car menu-items)) (if (listp last-nonmenu-event) (x-popup-menu last-nonmenu-event `("Eglot code actions:" ("dummy" ,@menu-items))) (cdr (assoc (completing-read (format "[eglot] Pick an action (default %s): " default-action) menu-items nil t nil nil default-action) menu-items)))))) (eglot-execute server chosen))) (defmacro eglot--code-action (name kind) "Define NAME to execute KIND code action." `(defun ,name (beg &optional end) ,(format "Execute `%s' code actions between BEG and END." kind) (interactive (eglot--code-action-bounds)) (eglot-code-actions beg end ,kind t))) (eglot--code-action eglot-code-action-organize-imports "source.organizeImports") (eglot--code-action eglot-code-action-extract "refactor.extract") (eglot--code-action eglot-code-action-inline "refactor.inline") (eglot--code-action eglot-code-action-rewrite "refactor.rewrite") (eglot--code-action eglot-code-action-quickfix "quickfix") ;;; Dynamic registration ;;; (cl-defmethod eglot-register-capability (server (method (eql workspace/didChangeWatchedFiles)) id &key watchers) "Handle dynamic registration of workspace/didChangeWatchedFiles." (eglot-unregister-capability server method id) (let* (success (globs (mapcar (eglot--lambda ((FileSystemWatcher) globPattern kind) (cons (eglot--glob-compile globPattern t t) ;; the default "7" means bitwise OR of ;; WatchKind.Create (1), WatchKind.Change ;; (2), WatchKind.Delete (4) (or kind 7))) watchers)) (dirs-to-watch (delete-dups (mapcar #'file-name-directory (project-files (eglot--project server)))))) (cl-labels ((handle-event (event) (pcase-let* ((`(,desc ,action ,file ,file1) event) (action-type (cl-case action (created 1) (changed 2) (deleted 3))) (action-bit (when action-type (ash 1 (1- action-type))))) (cond ((and (memq action '(created changed deleted)) (cl-loop for (glob . kind-bitmask) in globs thereis (and (> (logand kind-bitmask action-bit) 0) (funcall glob file)))) (jsonrpc-notify server :workspace/didChangeWatchedFiles `(:changes ,(vector `(:uri ,(eglot-path-to-uri file) :type ,action-type)))) (when (and (eq action 'created) (file-directory-p file)) (watch-dir file))) ((eq action 'renamed) (handle-event `(,desc 'deleted ,file)) (handle-event `(,desc 'created ,file1)))))) (watch-dir (dir) (when-let ((probe (and (file-readable-p dir) (or (gethash dir (eglot--file-watches server)) (puthash dir (list (file-notify-add-watch dir '(change) #'handle-event)) (eglot--file-watches server)))))) (push id (cdr probe))))) (unwind-protect (progn (mapc #'watch-dir dirs-to-watch) (setq success `(:message ,(format "OK, watching %s directories in %s watchers" (length dirs-to-watch) (length watchers))))) (unless success (eglot-unregister-capability server method id)))))) (cl-defmethod eglot-unregister-capability (server (_method (eql workspace/didChangeWatchedFiles)) id) "Handle dynamic unregistration of workspace/didChangeWatchedFiles." (maphash (lambda (dir watch-and-ids) (setcdr watch-and-ids (delete id (cdr watch-and-ids))) (when (null (cdr watch-and-ids)) (file-notify-rm-watch (car watch-and-ids)) (remhash dir (eglot--file-watches server)))) (eglot--file-watches server)) (list t "OK")) ;;; Glob heroics ;;; (defun eglot--glob-parse (glob) "Compute list of (STATE-SYM EMITTER-FN PATTERN)." (with-temp-buffer (save-excursion (insert glob)) (cl-loop with grammar = '((:** "\\*\\*/?" eglot--glob-emit-**) (:* "\\*" eglot--glob-emit-*) (:? "\\?" eglot--glob-emit-?) (:{} "{[^{}]+}" eglot--glob-emit-{}) (:range "\\[\\^?[^][/,*{}]+\\]" eglot--glob-emit-range) (:literal "[^][,*?{}]+" eglot--glob-emit-self)) until (eobp) collect (cl-loop for (_token regexp emitter) in grammar thereis (and (re-search-forward (concat "\\=" regexp) nil t) (list (cl-gensym "state-") emitter (match-string 0))) finally (error "Glob '%s' invalid at %s" (buffer-string) (point)))))) (cl-defun eglot--glob-fsm (states &key (exit 'eobp) noerror) `(cl-labels ,(cl-loop for (this that) on states for (self emit text) = this for next = (or (car that) exit) collect (funcall emit text self next)) ,(if noerror `(,(caar states)) `(or (,(caar states)) (error "Glob done but more unmatched text: '%s'" (buffer-substring (point) (point-max))))))) (defun eglot--glob-compile (glob &optional byte-compile noerror) "Convert GLOB into Elisp function. Maybe BYTE-COMPILE it. If NOERROR, return predicate, else erroring function." (let* ((states (eglot--glob-parse glob)) (body `(with-current-buffer (get-buffer-create " *eglot-glob-matcher*") (erase-buffer) (save-excursion (insert string)) ,(eglot--glob-fsm states))) (form `(lambda (string) ,(if noerror `(ignore-errors ,body) body)))) (if byte-compile (byte-compile form) form))) (defun eglot--glob-emit-self (text self next) `(,self () (re-search-forward ,(concat "\\=" (regexp-quote text))) (,next))) (defun eglot--glob-emit-** (_ self next) `(,self () (or (ignore-errors (save-excursion (,next))) (and (re-search-forward "\\=/?[^/]+/?") (,self))))) (defun eglot--glob-emit-* (_ self next) `(,self () (re-search-forward "\\=[^/]") (or (ignore-errors (save-excursion (,next))) (,self)))) (defun eglot--glob-emit-? (_ self next) `(,self () (re-search-forward "\\=[^/]") (,next))) (defun eglot--glob-emit-{} (arg self next) (let ((alternatives (split-string (substring arg 1 (1- (length arg))) ","))) (if (cl-notany (lambda (a) (string-match "\\*" a)) alternatives) `(,self () (or (re-search-forward ,(concat "\\=" (regexp-opt alternatives)) nil t) (error "No alternatives match: %s" ',alternatives)) (,next)) (let ((fsms (mapcar (lambda (a) `(save-excursion (ignore-errors ,(eglot--glob-fsm (eglot--glob-parse a) :exit next :noerror t)))) alternatives))) `(,self () (or ,@fsms (error "Glob match fail after alternatives %s" ',alternatives))))))) (defun eglot--glob-emit-range (arg self next) (when (eq ?! (aref arg 1)) (aset arg 1 ?^)) `(,self () (re-search-forward ,(concat "\\=" arg)) (,next))) ;;; List connections mode (define-derived-mode eglot-list-connections-mode tabulated-list-mode "" "Eglot mode for listing server connections. \\{eglot-list-connections-mode-map}" :interactive nil (setq-local tabulated-list-format `[("Language server" 16) ("Project name" 16) ("Modes handled" 16)]) (tabulated-list-init-header)) (defun eglot-list-connections () "List currently active Eglot connections." (interactive) (with-current-buffer (get-buffer-create "*EGLOT connections*") (let ((inhibit-read-only t)) (erase-buffer) (eglot-list-connections-mode) (setq-local tabulated-list-entries (mapcar (lambda (server) (list server `[,(or (plist-get (eglot--server-info server) :name) (jsonrpc-name server)) ,(eglot-project-nickname server) ,(mapconcat #'symbol-name (eglot--major-modes server) ", ")])) (cl-reduce #'append (hash-table-values eglot--servers-by-project)))) (revert-buffer) (pop-to-buffer (current-buffer))))) ;;; Inlay hints (defface eglot-inlay-hint-face '((t (:height 0.8 :inherit shadow))) "Face used for inlay hint overlays.") (defface eglot-type-hint-face '((t (:inherit eglot-inlay-hint-face))) "Face used for type inlay hint overlays.") (defface eglot-parameter-hint-face '((t (:inherit eglot-inlay-hint-face))) "Face used for parameter inlay hint overlays.") (defvar-local eglot--outstanding-inlay-hints-region (cons nil nil) "Jit-lock-calculated (FROM . TO) region with potentially outdated hints.") (defvar-local eglot--outstanding-inlay-hints-last-region nil) (defvar-local eglot--outstanding-inlay-regions-timer nil "Helper timer for `eglot--update-hints'.") (defun eglot--update-hints (from to) "Jit-lock function for Eglot inlay hints." (cl-symbol-macrolet ((region eglot--outstanding-inlay-hints-region) (last-region eglot--outstanding-inlay-hints-last-region) (timer eglot--outstanding-inlay-regions-timer)) (setcar region (min (or (car region) (point-max)) from)) (setcdr region (max (or (cdr region) (point-min)) to)) ;; HACK: We're relying on knowledge of jit-lock internals here. The ;; condition comparing `jit-lock-context-unfontify-pos' to ;; `point-max' is a heuristic for telling whether this call to ;; `jit-lock-functions' happens after `jit-lock-context-timer' has ;; just run. Only after this delay should we start the smoothing ;; timer that will eventually call `eglot--update-hints-1' with the ;; coalesced region. I wish we didn't need the timer, but sometimes ;; a lot of "non-contextual" calls come in all at once and do verify ;; the condition. Notice it is a 0 second timer though, so we're ;; not introducing any more delay over jit-lock's timers. (when (= jit-lock-context-unfontify-pos (point-max)) (if timer (cancel-timer timer)) (let ((buf (current-buffer))) (setq timer (run-at-time 0 nil (lambda () (eglot--when-live-buffer buf ;; HACK: In some pathological situations ;; (Emacs's own coding.c, for example), ;; jit-lock is calling `eglot--update-hints' ;; repeatedly with same sequence of ;; arguments, which leads to ;; `eglot--update-hints-1' being called with ;; the same region repeatedly. This happens ;; even if the hint-painting code does ;; nothing else other than widen, narrow, ;; move point then restore these things. ;; Possible Emacs bug, but this fixes it. (unless (equal last-region region) (eglot--update-hints-1 (max (car region) (point-min)) (min (cdr region) (point-max))) (setq last-region region)) (setq region (cons nil nil) timer nil))))))))) (defun eglot--update-hints-1 (from to) "Do most work for `eglot--update-hints', including LSP request." (let* ((buf (current-buffer)) (paint-hint (eglot--lambda ((InlayHint) position kind label paddingLeft paddingRight) (goto-char (eglot--lsp-position-to-point position)) (when (or (> (point) to) (< (point) from)) (cl-return)) (let* ((left-pad (and paddingLeft (not (eq paddingLeft :json-false)) (not (memq (char-before) '(32 9))) " ")) (right-pad (and paddingRight (not (eq paddingRight :json-false)) (not (memq (char-after) '(32 9))) " ")) (peg-after-p (eql kind 1))) (cl-labels ((make-ov () (if peg-after-p (make-overlay (point) (1+ (point)) nil t) (make-overlay (1- (point)) (point) nil nil nil))) (do-it (label lpad rpad i n) (let* ((firstp (zerop i)) (tweak-cursor-p (and firstp peg-after-p)) (ov (make-ov)) (text (concat lpad label rpad))) (when tweak-cursor-p (put-text-property 0 1 'cursor 1 text)) (overlay-put ov (if peg-after-p 'before-string 'after-string) (propertize text 'face (pcase kind (1 'eglot-type-hint-face) (2 'eglot-parameter-hint-face) (_ 'eglot-inlay-hint-face)))) (overlay-put ov 'priority (if peg-after-p i (- n i))) (overlay-put ov 'eglot--inlay-hint t) (overlay-put ov 'evaporate t) (overlay-put ov 'eglot--overlay t)))) (if (stringp label) (do-it label left-pad right-pad 0 1) (cl-loop for i from 0 for ldetail across label do (eglot--dbind ((InlayHintLabelPart) value) ldetail (do-it value (and (zerop i) left-pad) (and (= i (1- (length label))) right-pad) i (length label)))))))))) (jsonrpc-async-request (eglot--current-server-or-lose) :textDocument/inlayHint (list :textDocument (eglot--TextDocumentIdentifier) :range (list :start (eglot--pos-to-lsp-position from) :end (eglot--pos-to-lsp-position to))) :success-fn (lambda (hints) (eglot--when-live-buffer buf (eglot--widening ;; Overlays ending right at FROM with an ;; `after-string' property logically belong to ;; the (FROM TO) region. Likewise, such ;; overlays ending at TO don't logically belong ;; to it. (dolist (o (overlays-in (1- from) to)) (when (and (overlay-get o 'eglot--inlay-hint) (cond ((eq (overlay-end o) from) (overlay-get o 'after-string)) ((eq (overlay-end o) to) (overlay-get o 'before-string)) (t))) (delete-overlay o))) (mapc paint-hint hints)))) :deferred 'eglot--update-hints-1))) (define-minor-mode eglot-inlay-hints-mode "Minor mode for annotating buffers with LSP server's inlay hints." :global nil (cond (eglot-inlay-hints-mode (if (eglot-server-capable :inlayHintProvider) (jit-lock-register #'eglot--update-hints 'contextual) (eglot-inlay-hints-mode -1))) (t (jit-lock-unregister #'eglot--update-hints) (remove-overlays nil nil 'eglot--inlay-hint t)))) ;;; Hacks ;;; ;; Emacs bug#56407, the optimal solution is in desktop.el, but that's ;; harder. For now, use `with-eval-after-load'. See also github#1183. (with-eval-after-load 'desktop (add-to-list 'desktop-minor-mode-handlers '(eglot--managed-mode . ignore)) (add-to-list 'desktop-minor-mode-handlers '(eglot-inlay-hints-mode . ignore))) ;;; Misc ;;; ;;;###autoload (progn (put 'eglot--debbugs-or-github-bug-uri 'bug-reference-url-format t) (defun eglot--debbugs-or-github-bug-uri () (format (if (string= (match-string 2) "github") "https://github.com/joaotavora/eglot/issues/%s" "https://debbugs.gnu.org/%s") (match-string 3)))) ;; Add command-mode property manually for compatibility with Emacs < 28. (dolist (sym '(eglot-clear-status eglot-code-action-inline eglot-code-action-organize-imports eglot-code-action-quickfix eglot-code-action-rewrite eglot-code-action-rewrite eglot-code-actions eglot-find-declaration eglot-find-implementation eglot-find-typeDefinition eglot-forget-pending-continuations eglot-format eglot-format-buffer eglot-inlay-hints-mode eglot-reconnect eglot-rename eglot-signal-didChangeConfiguration eglot-stderr-buffer)) (function-put sym 'command-modes '(eglot--managed-mode))) (provide 'eglot) ;; Local Variables: ;; bug-reference-bug-regexp: "\\(\\(github\\|bug\\)#\\([0-9]+\\)\\)" ;; bug-reference-url-format: eglot--debbugs-or-github-bug-uri ;; checkdoc-force-docstrings-flag: nil ;; End: ;;; eglot.el ends here