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| -rw-r--r-- | editors/emacs/rust-analyzer.el | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/editors/emacs/rust-analyzer.el b/editors/emacs/rust-analyzer.el deleted file mode 100644 index 9b426fcae92..00000000000 --- a/editors/emacs/rust-analyzer.el +++ /dev/null @@ -1,295 +0,0 @@ -;;; rust-analyzer.el --- Rust analyzer emacs bindings for emacs-lsp -*- lexical-binding: t; -*- -;;; Code: - -(require 'lsp) -(require 'dash) -(require 'ht) - -;; This currently -;; - sets up rust-analyzer with emacs-lsp, giving -;; - code actions -;; - completion (use company-lsp for proper snippet support) -;; - imenu support -;; - on-type formatting -;; - 'hover' type information & documentation (with lsp-ui) -;; - implements source changes (for code actions etc.), except for file system changes -;; - implements joinLines (you need to bind rust-analyzer-join-lines to a key) -;; - implements selectionRanges (either bind lsp-extend-selection to a key, or use expand-region) -;; - provides rust-analyzer-inlay-hints-mode for inline type hints -;; - provides rust-analyzer-expand-macro to expand macros - -;; What's missing: -;; - file system changes in apply-source-change -;; - semantic highlighting -;; - onEnter, parentModule, findMatchingBrace -;; - runnables -;; - the debugging commands (syntaxTree and analyzerStatus) -;; - more - -;; Also, there's a problem with company-lsp's caching being too eager, sometimes -;; resulting in outdated completions. - -(defcustom rust-analyzer-command '("ra_lsp_server") - "" - :type '(repeat (string))) - -(defconst rust-analyzer--notification-handlers - '(("rust-analyzer/publishDecorations" . (lambda (_w _p))))) - -(defconst rust-analyzer--action-handlers - '(("rust-analyzer.applySourceChange" . - (lambda (p) (rust-analyzer--apply-source-change-command p))) - ("rust-analyzer.selectAndApplySourceChange" . - (lambda (p) (rust-analyzer--select-and-apply-source-change-command p))))) - -(defun rust-analyzer--uri-filename (text-document) - (lsp--uri-to-path (gethash "uri" text-document))) - -(defun rust-analyzer--goto-lsp-loc (loc) - (-let (((&hash "line" "character") loc)) - (goto-line (1+ line)) - (move-to-column character))) - -(defun rust-analyzer--apply-text-document-edit (edit) - "Like lsp--apply-text-document-edit, but it allows nil version." - (let* ((ident (gethash "textDocument" edit)) - (filename (rust-analyzer--uri-filename ident)) - (version (gethash "version" ident))) - (with-current-buffer (find-file-noselect filename) - (when (or (not version) (= version (lsp--cur-file-version))) - (lsp--apply-text-edits (gethash "edits" edit)))))) - -(defun rust-analyzer--apply-source-change (data) - ;; TODO fileSystemEdits - (seq-doseq (it (-> data (ht-get "workspaceEdit") (ht-get "documentChanges"))) - (rust-analyzer--apply-text-document-edit it)) - (-when-let (cursor-position (ht-get data "cursorPosition")) - (let ((filename (rust-analyzer--uri-filename (ht-get cursor-position "textDocument"))) - (position (ht-get cursor-position "position"))) - (find-file filename) - (rust-analyzer--goto-lsp-loc position)))) - -(defun rust-analyzer--apply-source-change-command (p) - (let ((data (-> p (ht-get "arguments") (lsp-seq-first)))) - (rust-analyzer--apply-source-change data))) - -(defun rust-analyzer--select-and-apply-source-change-command (p) - (let* ((options (-> p (ht-get "arguments") (lsp-seq-first))) - (chosen-option (lsp--completing-read "Select option:" options - (-lambda ((&hash "label")) label)))) - (rust-analyzer--apply-source-change chosen-option))) - -(lsp-register-client - (make-lsp-client - :new-connection (lsp-stdio-connection (lambda () rust-analyzer-command)) - :notification-handlers (ht<-alist rust-analyzer--notification-handlers) - :action-handlers (ht<-alist rust-analyzer--action-handlers) - :major-modes '(rust-mode) - :ignore-messages nil - :server-id 'rust-analyzer)) - -(defun rust-analyzer--initialized? () - (when-let ((workspace (lsp-find-workspace 'rust-analyzer (buffer-file-name)))) - (eq 'initialized (lsp--workspace-status workspace)))) - -(with-eval-after-load 'company-lsp - ;; company-lsp provides a snippet handler for rust by default that adds () after function calls, which RA does better - (setq company-lsp--snippet-functions (cl-delete "rust" company-lsp--snippet-functions :key #'car :test #'equal))) - -;; join lines - -(defun rust-analyzer--join-lines-params () - "Join lines params." - (list :textDocument (lsp--text-document-identifier) - :range (if (use-region-p) - (lsp--region-to-range (region-beginning) (region-end)) - (lsp--region-to-range (point) (point))))) - -(defun rust-analyzer-join-lines () - (interactive) - (-> - (lsp-send-request (lsp-make-request "rust-analyzer/joinLines" - (rust-analyzer--join-lines-params))) - (rust-analyzer--apply-source-change))) - -;; selection ranges - -(defun rust-analyzer--add-er-expansion () - (make-variable-buffer-local 'er/try-expand-list) - (setq er/try-expand-list (append - er/try-expand-list - '(lsp-extend-selection)))) - -(with-eval-after-load 'expand-region - ;; add the expansion for all existing rust-mode buffers. If expand-region is - ;; loaded lazily, it might be loaded when the first rust buffer is opened, and - ;; then it's too late for the hook for that buffer - (dolist (buf (buffer-list)) - (with-current-buffer buf - (when (eq 'rust-mode major-mode) - (rust-analyzer--add-er-expansion)))) - (add-hook 'rust-mode-hook 'rust-analyzer--add-er-expansion)) - -;; runnables -(defvar rust-analyzer--last-runnable nil) - -(defun rust-analyzer--runnables-params () - (list :textDocument (lsp--text-document-identifier) - :position (lsp--cur-position))) - -(defun rust-analyzer--runnables () - (lsp-send-request (lsp-make-request "rust-analyzer/runnables" - (rust-analyzer--runnables-params)))) - -(defun rust-analyzer--select-runnable () - (lsp--completing-read - "Select runnable:" - (if rust-analyzer--last-runnable - (cons rust-analyzer--last-runnable (rust-analyzer--runnables)) - (rust-analyzer--runnables)) - (-lambda ((&hash "label")) label))) - -(defun rust-analyzer-run (runnable) - (interactive (list (rust-analyzer--select-runnable))) - (-let* (((&hash "env" "bin" "args" "label") runnable) - (compilation-environment (-map (-lambda ((k v)) (concat k "=" v)) (ht-items env)))) - (compilation-start - (string-join (append (list bin) args '()) " ") - ;; cargo-process-mode is nice, but try to work without it... - (if (functionp 'cargo-process-mode) 'cargo-process-mode nil) - (lambda (_) (concat "*" label "*"))) - (setq rust-analyzer--last-runnable runnable))) - -(defun rust-analyzer-rerun (&optional runnable) - (interactive (list (or rust-analyzer--last-runnable - (rust-analyzer--select-runnable)))) - (rust-analyzer-run (or runnable rust-analyzer--last-runnable))) - -;; analyzer status buffer -(define-derived-mode rust-analyzer-status-mode special-mode "Rust-Analyzer-Status" - "Mode for the rust-analyzer status buffer.") - -(defvar-local rust-analyzer--status-buffer-workspace nil) - -(defun rust-analyzer-status () - "Displays status information for rust-analyzer." - (interactive) - (let* ((workspace (lsp-find-workspace 'rust-analyzer (buffer-file-name))) - (buf (get-buffer-create (concat "*rust-analyzer status " (with-lsp-workspace workspace (lsp-workspace-root)) "*")))) - (with-current-buffer buf - (rust-analyzer-status-mode) - (setq rust-analyzer--status-buffer-workspace workspace) - (rust-analyzer-status-buffer-refresh)) - (pop-to-buffer buf))) - -(defun rust-analyzer-status-buffer-refresh () - (interactive) - (when rust-analyzer--status-buffer-workspace - (let ((inhibit-read-only t)) - (erase-buffer) - (insert (with-lsp-workspace rust-analyzer--status-buffer-workspace - (lsp-send-request (lsp-make-request - "rust-analyzer/analyzerStatus"))))))) - - -(defun rust-analyzer--syntax-tree-params () - "Syntax tree params." - (list :textDocument (lsp--text-document-identifier) - :range (if (use-region-p) - (lsp--region-to-range (region-beginning) (region-end)) - (lsp--region-to-range (point-min) (point-max))))) - -(defun rust-analyzer-syntax-tree () - "Displays syntax tree for current buffer." - (interactive) - (when (eq 'rust-mode major-mode) - (let* ((workspace (lsp-find-workspace 'rust-analyzer (buffer-file-name))) - (buf (get-buffer-create (concat "*rust-analyzer syntax tree " (with-lsp-workspace workspace (lsp-workspace-root)) "*")))) - (when workspace - (let ((parse-result (with-lsp-workspace workspace - (lsp-send-request (lsp-make-request - "rust-analyzer/syntaxTree" - (rust-analyzer--syntax-tree-params)))))) - (with-current-buffer buf - (let ((inhibit-read-only t)) - (erase-buffer) - (insert parse-result))) - (pop-to-buffer buf)))))) - -;; inlay hints -(defun rust-analyzer--update-inlay-hints (buffer) - (if (and (rust-analyzer--initialized?) (eq buffer (current-buffer))) - (lsp-request-async - "rust-analyzer/inlayHints" - (list :textDocument (lsp--text-document-identifier)) - (lambda (res) - (remove-overlays (point-min) (point-max) 'rust-analyzer--inlay-hint t) - (dolist (hint res) - (-let* (((&hash "range" "label" "kind") hint) - ((beg . end) (lsp--range-to-region range)) - (overlay (make-overlay beg end))) - (overlay-put overlay 'rust-analyzer--inlay-hint t) - (overlay-put overlay 'evaporate t) - (cond - ((string= kind "TypeHint") - (overlay-put overlay 'after-string (propertize (concat ": " label) - 'font-lock-face 'font-lock-comment-face))) - ((string= kind "ParameterHint") - (overlay-put overlay 'before-string (propertize (concat label ": ") - 'font-lock-face 'font-lock-comment-face))) - ) - ))) - :mode 'tick)) - nil) - -(defvar-local rust-analyzer--inlay-hints-timer nil) - -(defun rust-analyzer--inlay-hints-change-handler (&rest rest) - (when rust-analyzer--inlay-hints-timer - (cancel-timer rust-analyzer--inlay-hints-timer)) - (setq rust-analyzer--inlay-hints-timer - (run-with-idle-timer 0.1 nil #'rust-analyzer--update-inlay-hints (current-buffer)))) - -(define-minor-mode rust-analyzer-inlay-hints-mode - "Mode for showing inlay hints." - nil nil nil - (cond - (rust-analyzer-inlay-hints-mode - (rust-analyzer--update-inlay-hints (current-buffer)) - (add-hook 'lsp-after-initialize-hook #'rust-analyzer--inlay-hints-change-handler nil t) - (add-hook 'after-change-functions #'rust-analyzer--inlay-hints-change-handler nil t)) - (t - (remove-overlays (point-min) (point-max) 'rust-analyzer--inlay-hint t) - (remove-hook 'lsp-after-initialize-hook #'rust-analyzer--inlay-hints-change-handler t) - (remove-hook 'after-change-functions #'rust-analyzer--inlay-hints-change-handler t)))) - - - -;; expand macros -(defun rust-analyzer-expand-macro () - "Expands the macro call at point recursively." - (interactive) - (when (eq 'rust-mode major-mode) - (let* ((workspace (lsp-find-workspace 'rust-analyzer (buffer-file-name))) - (params (list :textDocument (lsp--text-document-identifier) - :position (lsp--cur-position)))) - (when workspace - (let* ((response (with-lsp-workspace workspace - (lsp-send-request (lsp-make-request - "rust-analyzer/expandMacro" - params)))) - (result (when response (ht-get response "expansion")))) - (if result - (let ((buf (get-buffer-create (concat "*rust-analyzer macro expansion " (with-lsp-workspace workspace (lsp-workspace-root)) "*")))) - (with-current-buffer buf - (let ((inhibit-read-only t)) - (erase-buffer) - (insert result) - (setq buffer-read-only t) - (special-mode))) - (pop-to-buffer buf)) - (message "No macro found at point, or it could not be expanded"))))))) - - -(provide 'rust-analyzer) -;;; rust-analyzer.el ends here |