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lsp-completion.el
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lsp-completion.el
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;;; lsp-completion.el --- LSP completion -*- lexical-binding: t; -*-
;;
;; Copyright (C) 2020 emacs-lsp maintainers
;;
;; This program 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.
;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
;;
;;; Commentary:
;;
;; LSP completion
;;
;;; Code:
(require 'lsp-mode)
(defgroup lsp-completion nil
"LSP support for completion."
:prefix "lsp-completion-"
:group 'lsp-mode
:tag "LSP Completion")
;;;###autoload
(define-obsolete-variable-alias 'lsp-prefer-capf
'lsp-completion-provider "lsp-mode 7.0.1")
(defcustom lsp-completion-provider :capf
"The completion backend provider."
:type '(choice
(const :tag "Use company-capf" :capf)
(const :tag "None" :none))
:group 'lsp-completion
:package-version '(lsp-mode . "7.0.1"))
;;;###autoload
(define-obsolete-variable-alias 'lsp-enable-completion-at-point
'lsp-completion-enable "lsp-mode 7.0.1")
(defcustom lsp-completion-enable t
"Enable `completion-at-point' integration."
:type 'boolean
:group 'lsp-completion)
(defcustom lsp-completion-enable-additional-text-edit t
"Whether or not to apply additional text edit when performing completion.
If set to non-nil, `lsp-mode' will apply additional text edits
from the server. Otherwise, the additional text edits are
ignored."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "6.3.2"))
(defcustom lsp-completion-show-kind t
"Whether or not to show kind of completion candidates."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "7.0.1"))
(defcustom lsp-completion-show-detail t
"Whether or not to show detail of completion candidates."
:type 'boolean
:group 'lsp-completion)
(defcustom lsp-completion-show-label-description t
"Whether or not to show description of completion candidates."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "8.0.1"))
(defcustom lsp-completion-no-cache nil
"Whether or not caching the returned completions from server."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "7.0.1"))
(defcustom lsp-completion-filter-on-incomplete t
"Whether or not filter incomplete results."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "7.0.1"))
(defcustom lsp-completion-sort-initial-results t
"Whether or not filter initial results from server."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "8.0.0"))
(defcustom lsp-completion-use-last-result t
"Temporarily use last server result when interrupted by keyboard.
This will help minimize popup flickering issue in `company-mode'."
:type 'boolean
:group 'lsp-completion
:package-version '(lsp-mode . "8.0.0"))
(defconst lsp-completion--item-kind
[nil
"Text"
"Method"
"Function"
"Constructor"
"Field"
"Variable"
"Class"
"Interface"
"Module"
"Property"
"Unit"
"Value"
"Enum"
"Keyword"
"Snippet"
"Color"
"File"
"Reference"
"Folder"
"EnumMember"
"Constant"
"Struct"
"Event"
"Operator"
"TypeParameter"])
(defvar yas-indent-line)
(defvar company-backends)
(defvar company-abort-on-unique-match)
(defvar lsp-completion--no-reordering nil
"Dont do client-side reordering completion items when set.")
(declare-function company-mode "ext:company")
(declare-function yas-expand-snippet "ext:yasnippet")
(defun lsp-doc-buffer (&optional string)
"Return doc for STRING."
(with-current-buffer (get-buffer-create "*lsp-documentation*")
(erase-buffer)
(fundamental-mode)
(when string
(save-excursion
(insert string)
(visual-line-mode)))
(current-buffer)))
(defun lsp-falsy? (val)
"Non-nil if VAL is falsy."
;; https://developer.mozilla.org/en-US/docs/Glossary/Falsy
(or (not val) (equal val "") (equal val 0)))
(cl-defun lsp-completion--make-item (item &key markers prefix)
"Make completion item from lsp ITEM and with MARKERS and PREFIX."
(-let (((&CompletionItem :label
:sort-text?
:_emacsStartPoint start-point)
item))
(propertize label
'lsp-completion-item item
'lsp-sort-text sort-text?
'lsp-completion-start-point start-point
'lsp-completion-markers markers
'lsp-completion-prefix prefix)))
(defun lsp-completion--annotate (item)
"Annotate ITEM detail."
(-let (((&CompletionItem :detail? :kind? :label-details?) (plist-get (text-properties-at 0 item)
'lsp-completion-item)))
(concat (when (and lsp-completion-show-detail detail?)
(concat " " (s-replace "\r" "" detail?)))
(when (and lsp-completion-show-label-description label-details?)
(when-let ((description (and label-details? (lsp:label-details-description label-details?))))
(format " %s" description)))
(when lsp-completion-show-kind
(when-let ((kind-name (and kind? (aref lsp-completion--item-kind kind?))))
(format " (%s)" kind-name))))))
(defun lsp-completion--looking-back-trigger-characterp (trigger-characters)
"Return character if text before point match any of the TRIGGER-CHARACTERS."
(unless (= (point) (point-at-bol))
(seq-some
(lambda (trigger-char)
(and (equal (buffer-substring-no-properties (- (point) (length trigger-char)) (point))
trigger-char)
trigger-char))
trigger-characters)))
(defvar lsp-completion--cache nil
"Cached candidates for completion at point function.
In the form of plist (prefix-pos items :lsp-items :prefix ...).
When the completion is incomplete, `items' contains value of :incomplete.")
(defvar lsp-completion--last-result nil
"Last completion result.")
(defun lsp-completion--clear-cache (&optional keep-last-result)
"Clear completion caches.
KEEP-LAST-RESULT if specified."
(-some-> lsp-completion--cache
(cddr)
(plist-get :markers)
(cl-second)
(set-marker nil))
(setq lsp-completion--cache nil)
(unless keep-last-result (setq lsp-completion--last-result nil)))
(defcustom lsp-completion-default-behaviour :replace
"Default behaviour of `InsertReplaceEdit'."
:type '(choice
(const :insert :tag "Default completion inserts")
(const :replace :tag "Default completion replaces"))
:group 'lsp-mode
:package-version '(lsp-mode . "8.0.0"))
(lsp-defun lsp-completion--guess-prefix ((item &as &CompletionItem :text-edit?))
"Guess ITEM's prefix start point according to following heuristics:
- If `textEdit' exists, use insertion range start as prefix start point.
- Else, find the point before current point is longest prefix match of
`insertText' or `label'. And:
- The character before prefix is not word constitute
Return `nil' when fails to guess prefix."
(cond
((lsp-insert-replace-edit? text-edit?)
(lsp--position-to-point (lsp:range-start (lsp:insert-replace-edit-insert text-edit?))))
(text-edit?
(lsp--position-to-point (lsp:range-start (lsp:text-edit-range text-edit?))))
(t
(-let* (((&CompletionItem :label :insert-text?) item)
(text (or (unless (lsp-falsy? insert-text?) insert-text?) label))
(point (point))
(start (max 1 (- point (length text))))
(char-before (char-before start))
start-point)
(while (and (< start point) (not start-point))
(unless (or (and char-before (equal (char-syntax char-before) ?w))
(not (string-prefix-p (buffer-substring-no-properties start point)
text)))
(setq start-point start))
(cl-incf start)
(setq char-before (char-before start)))
start-point))))
(defun lsp-completion--to-internal (items)
"Convert ITEMS into internal form."
(--> items
(-map (-lambda ((item &as &CompletionItem
:label
:filter-text?
:_emacsStartPoint start-point
:score?))
`( :label ,(or (unless (lsp-falsy? filter-text?) filter-text?) label)
:item ,item
:start-point ,start-point
:score ,score?))
it)))
(cl-defun lsp-completion--filter-candidates (items &key
lsp-items
markers
prefix
&allow-other-keys)
"List all possible completions in cached ITEMS with their prefixes.
We can pass LSP-ITEMS, which will be used when there's no cache.
The MARKERS and PREFIX value will be attached to each candidate."
(lsp--while-no-input
(->>
(if items
(-->
(let (queries fuz-queries)
(-keep (-lambda ((cand &as &plist :label :start-point :score))
(let* ((query (or (plist-get queries start-point)
(let ((s (buffer-substring-no-properties
start-point (point))))
(setq queries (plist-put queries start-point s))
s)))
(fuz-query (or (plist-get fuz-queries start-point)
(let ((s (lsp-completion--regex-fuz query)))
(setq fuz-queries
(plist-put fuz-queries start-point s))
s)))
(label-len (length label)))
(when (string-match fuz-query label)
(put-text-property 0 label-len 'match-data (match-data) label)
(plist-put cand
:sort-score
(* (or (lsp-completion--fuz-score query label) 1e-05)
(or score 0.001)))
cand)))
items))
(if lsp-completion--no-reordering
it
(sort it (lambda (o1 o2)
(> (plist-get o1 :sort-score)
(plist-get o2 :sort-score)))))
;; TODO: pass additional function to sort the candidates
(-map (-rpartial #'plist-get :item) it))
lsp-items)
(-map (lambda (item) (lsp-completion--make-item item
:markers markers
:prefix prefix))))))
(defconst lsp-completion--kind->symbol
'((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 . enum-member)
(21 . constant)
(22 . struct)
(23 . event)
(24 . operator)
(25 . type-parameter)))
(defun lsp-completion--candidate-kind (item)
"Return ITEM's kind."
(alist-get (lsp:completion-item-kind? (get-text-property 0 'lsp-completion-item item))
lsp-completion--kind->symbol))
(defun lsp-completion--candidate-deprecated (item)
"Return if ITEM is deprecated."
(let ((completion-item (get-text-property 0 'lsp-completion-item item)))
(or (lsp:completion-item-deprecated? completion-item)
(seq-position (lsp:completion-item-tags? completion-item)
lsp/completion-item-tag-deprecated))))
(defun lsp-completion--company-match (candidate)
"Return highlight of typed prefix inside CANDIDATE."
(let* ((prefix (downcase
(buffer-substring-no-properties
(plist-get (text-properties-at 0 candidate) 'lsp-completion-start-point)
(point))))
(prefix-len (length prefix))
(prefix-pos 0)
(label (downcase candidate))
(label-len (length label))
(label-pos 0)
matches start)
(while (and (not matches)
(< prefix-pos prefix-len))
(while (and (< prefix-pos prefix-len)
(< label-pos label-len))
(if (equal (aref prefix prefix-pos) (aref label label-pos))
(progn
(unless start (setq start label-pos))
(cl-incf prefix-pos))
(when start
(setq matches (nconc matches `((,start . ,label-pos))))
(setq start nil)))
(cl-incf label-pos))
(when start (setq matches (nconc matches `((,start . ,label-pos)))))
;; Search again when the whole prefix is not matched
(when (< prefix-pos prefix-len)
(setq matches nil))
;; Start search from next offset of prefix to find a match with label
(unless matches
(cl-incf prefix-pos)
(setq label-pos 0)))
matches))
(defun lsp-completion--get-documentation (item)
"Get doc comment for completion ITEM."
(unless (get-text-property 0 'lsp-completion-resolved item)
(let ((resolved-item
(-some->> item
(get-text-property 0 'lsp-completion-item)
(lsp-completion--resolve)))
(len (length item)))
(put-text-property 0 len 'lsp-completion-item resolved-item item)
(put-text-property 0 len 'lsp-completion-resolved t item)))
(-some->> item
(get-text-property 0 'lsp-completion-item)
(lsp:completion-item-documentation?)
(lsp--render-element)))
(defun lsp-completion--get-context (trigger-characters)
"Get completion context with provided TRIGGER-CHARACTERS."
(let* ((triggered-by-char non-essential)
(trigger-char (when triggered-by-char
(lsp-completion--looking-back-trigger-characterp
trigger-characters)))
(trigger-kind (cond
(trigger-char
lsp/completion-trigger-kind-trigger-character)
((equal (cl-second lsp-completion--cache) :incomplete)
lsp/completion-trigger-kind-trigger-for-incomplete-completions)
(t lsp/completion-trigger-kind-invoked))))
(apply #'lsp-make-completion-context
(nconc
`(:trigger-kind ,trigger-kind)
(when trigger-char
`(:trigger-character? ,trigger-char))))))
(defun lsp-completion--sort-completions (completions)
"Sort COMPLETIONS."
(sort
completions
(-lambda ((&CompletionItem :sort-text? sort-text-left :label label-left)
(&CompletionItem :sort-text? sort-text-right :label label-right))
(if (equal sort-text-left sort-text-right)
(string-lessp label-left label-right)
(string-lessp sort-text-left sort-text-right)))))
;;;###autoload
(defun lsp-completion-at-point ()
"Get lsp completions."
(when (or (--some (lsp--client-completion-in-comments? (lsp--workspace-client it))
(lsp-workspaces))
(not (nth 4 (syntax-ppss))))
(let* ((trigger-chars (-> (lsp--capability-for-method "textDocument/completion")
(lsp:completion-options-trigger-characters?)))
(bounds-start (or (-some--> (cl-first (bounds-of-thing-at-point 'symbol))
(save-excursion
(ignore-errors
(goto-char (+ it 1))
(while (lsp-completion--looking-back-trigger-characterp
trigger-chars)
(cl-incf it)
(forward-char))
it)))
(point)))
result done?
(candidates
(lambda ()
(lsp--catch 'input
(let ((lsp--throw-on-input lsp-completion-use-last-result)
(same-session? (and lsp-completion--cache
;; Special case for empty prefix and empty result
(or (cl-second lsp-completion--cache)
(not (string-empty-p
(plist-get (cddr lsp-completion--cache) :prefix))))
(equal (cl-first lsp-completion--cache) bounds-start)
(s-prefix?
(plist-get (cddr lsp-completion--cache) :prefix)
(buffer-substring-no-properties bounds-start (point))))))
(cond
((or done? result) result)
((and (not lsp-completion-no-cache)
same-session?
(listp (cl-second lsp-completion--cache)))
(setf result (apply #'lsp-completion--filter-candidates
(cdr lsp-completion--cache))))
(t
(-let* ((resp (lsp-request-while-no-input
"textDocument/completion"
(plist-put (lsp--text-document-position-params)
:context (lsp-completion--get-context trigger-chars))))
(completed (and resp
(not (and (lsp-completion-list? resp)
(lsp:completion-list-is-incomplete resp)))))
(items (lsp--while-no-input
(--> (cond
((lsp-completion-list? resp)
(lsp:completion-list-items resp))
(t resp))
(if (or completed
(seq-some #'lsp:completion-item-sort-text? it))
(lsp-completion--sort-completions it)
it)
(-map (lambda (item)
(lsp-put item
:_emacsStartPoint
(or (lsp-completion--guess-prefix item)
bounds-start)))
it))))
(markers (list bounds-start (copy-marker (point) t)))
(prefix (buffer-substring-no-properties bounds-start (point)))
(lsp-completion--no-reordering (not lsp-completion-sort-initial-results)))
(lsp-completion--clear-cache same-session?)
(setf done? completed
lsp-completion--cache (list bounds-start
(cond
((and done? (not (seq-empty-p items)))
(lsp-completion--to-internal items))
((not done?) :incomplete))
:lsp-items nil
:markers markers
:prefix prefix)
result (lsp-completion--filter-candidates
(cond (done?
(cl-second lsp-completion--cache))
(lsp-completion-filter-on-incomplete
(lsp-completion--to-internal items)))
:lsp-items items
:markers markers
:prefix prefix))))))
(:interrupted lsp-completion--last-result)
(`,res (setq lsp-completion--last-result res))))))
(list
bounds-start
(point)
(lambda (probe pred action)
(if (eq action 'metadata)
'(metadata (category . lsp-capf)
(display-sort-function . identity)
(cycle-sort-function . identity))
(complete-with-action action (funcall candidates) probe pred)))
:annotation-function #'lsp-completion--annotate
:company-kind #'lsp-completion--candidate-kind
:company-deprecated #'lsp-completion--candidate-deprecated
:company-require-match 'never
:company-prefix-length
(save-excursion
(goto-char bounds-start)
(and (lsp-completion--looking-back-trigger-characterp trigger-chars) t))
:company-match #'lsp-completion--company-match
:company-doc-buffer (-compose #'lsp-doc-buffer
#'lsp-completion--get-documentation)
:exit-function
(-rpartial #'lsp-completion--exit-fn candidates)))))
(defun lsp-completion--exit-fn (candidate _status &optional candidates)
"Exit function of `completion-at-point'.
CANDIDATE is the selected completion item.
Others: CANDIDATES"
(unwind-protect
(-let* ((candidate (if (plist-member (text-properties-at 0 candidate)
'lsp-completion-item)
candidate
(cl-find candidate (funcall candidates) :test #'equal)))
((&plist 'lsp-completion-item item
'lsp-completion-start-point start-point
'lsp-completion-markers markers
'lsp-completion-prefix prefix)
(text-properties-at 0 candidate))
((&CompletionItem? :label :insert-text? :text-edit? :insert-text-format?
:additional-text-edits? :insert-text-mode? :command?)
item))
(cond
(text-edit?
(apply #'delete-region markers)
(insert prefix)
(pcase text-edit?
((TextEdit) (lsp--apply-text-edit text-edit?))
((InsertReplaceEdit :insert :replace :new-text)
(lsp--apply-text-edit
(lsp-make-text-edit
:new-text new-text
:range (if (or (and current-prefix-arg (eq lsp-completion-default-behaviour :replace))
(and (not current-prefix-arg) (eq lsp-completion-default-behaviour :insert)))
insert
replace))))))
((or (unless (lsp-falsy? insert-text?) insert-text?) label)
(apply #'delete-region markers)
(insert prefix)
(delete-region start-point (point))
(insert (or (unless (lsp-falsy? insert-text?) insert-text?) label))))
(lsp--indent-lines start-point (point) insert-text-mode?)
(when (equal insert-text-format? lsp/insert-text-format-snippet)
(lsp--expand-snippet (buffer-substring start-point (point))
start-point
(point)))
(when lsp-completion-enable-additional-text-edit
(if (or (get-text-property 0 'lsp-completion-resolved candidate)
(not (seq-empty-p additional-text-edits?)))
(lsp--apply-text-edits additional-text-edits? 'completion)
(-let [(callback cleanup-fn) (lsp--create-apply-text-edits-handlers)]
(lsp-completion--resolve-async
item
(-compose callback #'lsp:completion-item-additional-text-edits?)
cleanup-fn))))
(if (or (get-text-property 0 'lsp-completion-resolved candidate)
command?)
(when command? (lsp--execute-command command?))
(lsp-completion--resolve-async
item
(-lambda ((&CompletionItem? :command?))
(when command? (lsp--execute-command command?)))))
(when (and (or
(equal lsp-signature-auto-activate t)
(memq :after-completion lsp-signature-auto-activate)
(and (memq :on-trigger-char lsp-signature-auto-activate)
(-when-let ((&SignatureHelpOptions? :trigger-characters?)
(lsp--capability :signatureHelpProvider))
(lsp-completion--looking-back-trigger-characterp
trigger-characters?))))
(lsp-feature? "textDocument/signatureHelp"))
(lsp-signature-activate))
(setq-local lsp-inhibit-lsp-hooks nil))
(lsp-completion--clear-cache)))
(defun lsp-completion--regex-fuz (str)
"Build a regex sequence from STR. Insert .* between each char."
(apply #'concat
(cl-mapcar
#'concat
(cons "" (cdr (seq-map (lambda (c) (format "[^%c]*" c)) str)))
(seq-map (lambda (c)
(format "\\(%s\\)" (regexp-quote (char-to-string c))))
str))))
(defun lsp-completion--fuz-score (query str)
"Calculate fuzzy score for STR with query QUERY.
The return is nil or in range of (0, inf)."
(-when-let* ((md (cddr (or (get-text-property 0 'match-data str)
(let ((re (lsp-completion--regex-fuz query)))
(when (string-match re str)
(match-data))))))
(start (pop md))
(len (length str))
;; To understand how this works, consider these bad ascii(tm)
;; diagrams showing how the pattern "foo" flex-matches
;; "fabrobazo", "fbarbazoo" and "barfoobaz":
;; f abr o baz o
;; + --- + --- +
;; f barbaz oo
;; + ------ ++
;; bar foo baz
;; --- +++ ---
;; "+" indicates parts where the pattern matched. A "hole" in
;; the middle of the string is indicated by "-". Note that there
;; are no "holes" near the edges of the string. The completion
;; score is a number bound by ]0..1]: the higher the better and
;; only a perfect match (pattern equals string) will have score
;; 1. The formula takes the form of a quotient. For the
;; numerator, we use the number of +, i.e. the length of the
;; pattern. For the denominator, it first computes
;;
;; hole_i_contrib = 1 + (Li-1)^1.05 for first hole
;; hole_i_contrib = 1 + (Li-1)^0.25 for hole i of length Li
;;
;; The final value for the denominator is then given by:
;;
;; (SUM_across_i(hole_i_contrib) + 1)
;;
(score-numerator 0)
(score-denominator 0)
(last-b -1)
(q-ind 0)
(update-score
(lambda (a b)
"Update score variables given match range (A B)."
(setq score-numerator (+ score-numerator (- b a)))
(unless (= a len)
;; case mis-match will be pushed to near next rank
(unless (equal (aref query q-ind) (aref str a))
(cl-incf a 0.9))
(setq score-denominator
(+ score-denominator
(if (= a last-b) 0
(+ 1 (* (if (< 0 (- a last-b 1)) 1 -1)
(expt (abs (- a last-b 1))
;; Give a higher score for match near start
(if (eq last-b -1) 0.75 0.25))))))))
(setq last-b b))))
(while md
(funcall update-score start (cl-first md))
;; Due to the way completion regex is constructed, `(eq end (+ start 1))`
(cl-incf q-ind)
(pop md)
(setq start (pop md)))
(unless (zerop len)
(/ score-numerator (1+ score-denominator) 1.0))))
(defun lsp-completion--fix-resolve-data (item)
"Patch `CompletionItem' ITEM for rust-analyzer otherwise resolve will fail.
See #2675"
(let ((data (lsp:completion-item-data? item)))
(when (lsp-member? data :import_for_trait_assoc_item)
(unless (lsp-get data :import_for_trait_assoc_item)
(lsp-put data :import_for_trait_assoc_item :json-false)))))
(defun lsp-completion--resolve (item)
"Resolve completion ITEM."
(cl-assert item nil "Completion item must not be nil")
(lsp-completion--fix-resolve-data item)
(or (ignore-errors
(when (lsp-feature? "completionItem/resolve")
(lsp-request "completionItem/resolve" item)))
item))
(defun lsp-completion--resolve-async (item callback &optional cleanup-fn)
"Resolve completion ITEM asynchronously with CALLBACK.
The CLEANUP-FN will be called to cleanup."
(cl-assert item nil "Completion item must not be nil")
(lsp-completion--fix-resolve-data item)
(ignore-errors
(if (lsp-feature? "completionItem/resolve")
(lsp-request-async "completionItem/resolve" item
(lambda (result)
(funcall callback result)
(when cleanup-fn (funcall cleanup-fn)))
:error-handler (lambda (err)
(when cleanup-fn (funcall cleanup-fn))
(error (lsp:json-error-message err)))
:cancel-handler cleanup-fn
:mode 'alive)
(funcall callback item)
(when cleanup-fn (funcall cleanup-fn)))))
;;;###autoload
(defun lsp-completion--enable ()
"Enable LSP completion support."
(when (and lsp-completion-enable
(lsp-feature? "textDocument/completion"))
(lsp-completion-mode 1)))
(defun lsp-completion--disable ()
"Disable LSP completion support."
(lsp-completion-mode -1))
(defun lsp-completion-passthrough-all-completions (_string table pred _point)
"Like `completion-basic-all-completions' but have prefix ignored.
TABLE PRED"
(completion-basic-all-completions "" table pred 0))
;;;###autoload
(define-minor-mode lsp-completion-mode
"Toggle LSP completion support."
:group 'lsp-completion
:global nil
:lighter ""
(let ((completion-started-fn (lambda (&rest _)
(setq-local lsp-inhibit-lsp-hooks t)))
(after-completion-fn (lambda (result)
(when (stringp result)
(lsp-completion--clear-cache))
(setq-local lsp-inhibit-lsp-hooks nil))))
(cond
(lsp-completion-mode
(make-local-variable 'completion-at-point-functions)
;; Ensure that `lsp-completion-at-point' the first CAPF to be tried,
;; unless user has put it elsewhere in the list by their own
(add-to-list 'completion-at-point-functions #'lsp-completion-at-point)
(make-local-variable 'completion-category-defaults)
(setf (alist-get 'lsp-capf completion-category-defaults) '((styles . (lsp-passthrough))))
(make-local-variable 'completion-styles-alist)
(setf (alist-get 'lsp-passthrough completion-styles-alist)
'(completion-basic-try-completion
lsp-completion-passthrough-all-completions
"Passthrough completion."))
(cond
((equal lsp-completion-provider :none))
((and (not (equal lsp-completion-provider :none))
(fboundp 'company-mode))
(setq-local company-abort-on-unique-match nil)
(company-mode 1)
(setq-local company-backends (cl-adjoin 'company-capf company-backends :test #'equal)))
(t
(lsp--warn "Unable to autoconfigure company-mode.")))
(when (bound-and-true-p company-mode)
(add-hook 'company-completion-started-hook
completion-started-fn
nil
t)
(add-hook 'company-after-completion-hook
after-completion-fn
nil
t))
(add-hook 'lsp-unconfigure-hook #'lsp-completion--disable nil t))
(t
(remove-hook 'completion-at-point-functions #'lsp-completion-at-point t)
(setq-local completion-category-defaults
(cl-remove 'lsp-capf completion-category-defaults :key #'cl-first))
(setq-local completion-styles-alist
(cl-remove 'lsp-passthrough completion-styles-alist :key #'cl-first))
(remove-hook 'lsp-unconfigure-hook #'lsp-completion--disable t)
(when (featurep 'company)
(remove-hook 'company-completion-started-hook
completion-started-fn
t)
(remove-hook 'company-after-completion-hook
after-completion-fn
t))))))
;;;###autoload
(add-hook 'lsp-configure-hook (lambda ()
(when (and lsp-auto-configure
lsp-completion-enable)
(lsp-completion--enable))))
(lsp-consistency-check lsp-completion)
(provide 'lsp-completion)
;;; lsp-completion.el ends here