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company.el
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;;; company.el --- Modular text completion framework -*- lexical-binding: t -*-
;; Copyright (C) 2009-2015 Free Software Foundation, Inc.
;; Author: Nikolaj Schumacher
;; Maintainer: Dmitry Gutov <[email protected]>
;; URL: http://company-mode.github.io/
;; Version: 0.9.0-cvs
;; Keywords: abbrev, convenience, matching
;; Package-Requires: ((emacs "24.1") (cl-lib "0.5"))
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Company is a modular completion mechanism. Modules for retrieving completion
;; candidates are called back-ends, modules for displaying them are front-ends.
;;
;; Company comes with many back-ends, e.g. `company-elisp'. These are
;; distributed in separate files and can be used individually.
;;
;; Place company.el and the back-ends you want to use in a directory and add the
;; following to your .emacs:
;; (add-to-list 'load-path "/path/to/company")
;; (autoload 'company-mode "company" nil t)
;;
;; Enable company-mode with M-x company-mode. For further information look at
;; the documentation for `company-mode' (C-h f company-mode RET)
;;
;; If you want to start a specific back-end, call it interactively or use
;; `company-begin-backend'. For example:
;; M-x company-abbrev will prompt for and insert an abbrev.
;;
;; To write your own back-end, look at the documentation for `company-backends'.
;; Here is a simple example completing "foo":
;;
;; (defun company-my-backend (command &optional arg &rest ignored)
;; (pcase command
;; (`prefix (when (looking-back "foo\\>")
;; (match-string 0)))
;; (`candidates (list "foobar" "foobaz" "foobarbaz"))
;; (`meta (format "This value is named %s" arg))))
;;
;; Sometimes it is a good idea to mix several back-ends together, for example to
;; enrich gtags with dabbrev-code results (to emulate local variables).
;; To do this, add a list with both back-ends as an element in company-backends.
;;
;;; Change Log:
;;
;; See NEWS.md in the repository.
;;; Code:
(require 'cl-lib)
(require 'newcomment)
;; FIXME: Use `user-error'.
(add-to-list 'debug-ignored-errors "^.* frontend cannot be used twice$")
(add-to-list 'debug-ignored-errors "^Echo area cannot be used twice$")
(add-to-list 'debug-ignored-errors "^No \\(document\\|loc\\)ation available$")
(add-to-list 'debug-ignored-errors "^Company not ")
(add-to-list 'debug-ignored-errors "^No candidate number ")
(add-to-list 'debug-ignored-errors "^Cannot complete at point$")
(add-to-list 'debug-ignored-errors "^No other back-end$")
;;; Compatibility
(eval-and-compile
;; `defvar-local' for Emacs 24.2 and below
(unless (fboundp 'defvar-local)
(defmacro defvar-local (var val &optional docstring)
"Define VAR as a buffer-local variable with default value VAL.
Like `defvar' but additionally marks the variable as being automatically
buffer-local wherever it is set."
(declare (debug defvar) (doc-string 3))
`(progn
(defvar ,var ,val ,docstring)
(make-variable-buffer-local ',var)))))
(defgroup company nil
"Extensible inline text completion mechanism"
:group 'abbrev
:group 'convenience
:group 'matching)
(defface company-tooltip
'((default :foreground "black")
(((class color) (min-colors 88) (background light))
(:background "cornsilk"))
(((class color) (min-colors 88) (background dark))
(:background "yellow")))
"Face used for the tooltip.")
(defface company-tooltip-selection
'((default :inherit company-tooltip)
(((class color) (min-colors 88) (background light))
(:background "light blue"))
(((class color) (min-colors 88) (background dark))
(:background "orange1"))
(t (:background "green")))
"Face used for the selection in the tooltip.")
(defface company-tooltip-search
'((default :inherit company-tooltip-selection))
"Face used for the search string in the tooltip.")
(defface company-tooltip-mouse
'((default :inherit highlight))
"Face used for the tooltip item under the mouse.")
(defface company-tooltip-common
'((default :inherit company-tooltip)
(((background light))
:foreground "darkred")
(((background dark))
:foreground "red"))
"Face used for the common completion in the tooltip.")
(defface company-tooltip-common-selection
'((default :inherit company-tooltip-selection)
(((background light))
:foreground "darkred")
(((background dark))
:foreground "red"))
"Face used for the selected common completion in the tooltip.")
(defface company-tooltip-annotation
'((default :inherit company-tooltip)
(((background light))
:foreground "firebrick4")
(((background dark))
:foreground "red4"))
"Face used for the annotation in the tooltip.")
(defface company-scrollbar-fg
'((((background light))
:background "darkred")
(((background dark))
:background "red"))
"Face used for the tooltip scrollbar thumb.")
(defface company-scrollbar-bg
'((default :inherit company-tooltip)
(((background light))
:background "wheat")
(((background dark))
:background "gold"))
"Face used for the tooltip scrollbar background.")
(defface company-preview
'((((background light))
:inherit company-tooltip-selection)
(((background dark))
:background "blue4"
:foreground "wheat"))
"Face used for the completion preview.")
(defface company-preview-common
'((((background light))
:inherit company-tooltip-selection)
(((background dark))
:inherit company-preview
:foreground "red"))
"Face used for the common part of the completion preview.")
(defface company-preview-search
'((((background light))
:inherit company-tooltip-common-selection)
(((background dark))
:inherit company-preview
:background "blue1"))
"Face used for the search string in the completion preview.")
(defface company-echo nil
"Face used for completions in the echo area.")
(defface company-echo-common
'((((background dark)) (:foreground "firebrick1"))
(((background light)) (:background "firebrick4")))
"Face used for the common part of completions in the echo area.")
(defun company-frontends-set (variable value)
;; Uniquify.
(let ((value (delete-dups (copy-sequence value))))
(and (memq 'company-pseudo-tooltip-unless-just-one-frontend value)
(memq 'company-pseudo-tooltip-frontend value)
(error "Pseudo tooltip frontend cannot be used twice"))
(and (memq 'company-preview-if-just-one-frontend value)
(memq 'company-preview-frontend value)
(error "Preview frontend cannot be used twice"))
(and (memq 'company-echo value)
(memq 'company-echo-metadata-frontend value)
(error "Echo area cannot be used twice"))
;; Preview must come last.
(dolist (f '(company-preview-if-just-one-frontend company-preview-frontend))
(when (cdr (memq f value))
(setq value (append (delq f value) (list f)))))
(set variable value)))
(defcustom company-frontends '(company-pseudo-tooltip-unless-just-one-frontend
company-preview-if-just-one-frontend
company-echo-metadata-frontend)
"The list of active front-ends (visualizations).
Each front-end is a function that takes one argument. It is called with
one of the following arguments:
`show': When the visualization should start.
`hide': When the visualization should end.
`update': When the data has been updated.
`pre-command': Before every command that is executed while the
visualization is active.
`post-command': After every command that is executed while the
visualization is active.
The visualized data is stored in `company-prefix', `company-candidates',
`company-common', `company-selection', `company-point' and
`company-search-string'."
:set 'company-frontends-set
:type '(repeat (choice (const :tag "echo" company-echo-frontend)
(const :tag "echo, strip common"
company-echo-strip-common-frontend)
(const :tag "show echo meta-data in echo"
company-echo-metadata-frontend)
(const :tag "pseudo tooltip"
company-pseudo-tooltip-frontend)
(const :tag "pseudo tooltip, multiple only"
company-pseudo-tooltip-unless-just-one-frontend)
(const :tag "preview" company-preview-frontend)
(const :tag "preview, unique only"
company-preview-if-just-one-frontend)
(function :tag "custom function" nil))))
(defcustom company-tooltip-limit 10
"The maximum number of candidates in the tooltip."
:type 'integer)
(defcustom company-tooltip-minimum 6
"The minimum height of the tooltip.
If this many lines are not available, prefer to display the tooltip above."
:type 'integer)
(defcustom company-tooltip-minimum-width 0
"The minimum width of the tooltip's inner area.
This doesn't include the margins and the scroll bar."
:type 'integer
:package-version '(company . "0.8.0"))
(defcustom company-tooltip-margin 1
"Width of margin columns to show around the toolip."
:type 'integer)
(defcustom company-tooltip-offset-display 'scrollbar
"Method using which the tooltip displays scrolling position.
`scrollbar' means draw a scrollbar to the right of the items.
`lines' means wrap items in lines with \"before\" and \"after\" counters."
:type '(choice (const :tag "Scrollbar" scrollbar)
(const :tag "Two lines" lines)))
(defcustom company-tooltip-align-annotations nil
"When non-nil, align annotations to the right tooltip border."
:type 'boolean
:package-version '(company . "0.7.1"))
(defcustom company-tooltip-flip-when-above nil
"Whether to flip the tooltip when it's above the current line."
:type 'boolean
:package-version '(company . "0.8.1"))
(defvar company-safe-backends
'((company-abbrev . "Abbrev")
(company-bbdb . "BBDB")
(company-capf . "completion-at-point-functions")
(company-clang . "Clang")
(company-cmake . "CMake")
(company-css . "CSS")
(company-dabbrev . "dabbrev for plain text")
(company-dabbrev-code . "dabbrev for code")
(company-eclim . "Eclim (an Eclipse interface)")
(company-elisp . "Emacs Lisp")
(company-etags . "etags")
(company-files . "Files")
(company-gtags . "GNU Global")
(company-ispell . "Ispell")
(company-keywords . "Programming language keywords")
(company-nxml . "nxml")
(company-oddmuse . "Oddmuse")
(company-semantic . "Semantic")
(company-tempo . "Tempo templates")
(company-xcode . "Xcode")))
(put 'company-safe-backends 'risky-local-variable t)
(defun company-safe-backends-p (backends)
(and (consp backends)
(not (cl-dolist (backend backends)
(unless (if (consp backend)
(company-safe-backends-p backend)
(assq backend company-safe-backends))
(cl-return t))))))
(defcustom company-backends `(,@(unless (version< "24.3.51" emacs-version)
(list 'company-elisp))
company-bbdb
company-nxml company-css
company-eclim company-semantic company-clang
company-xcode company-cmake
company-capf
(company-dabbrev-code company-gtags company-etags
company-keywords)
company-oddmuse company-files company-dabbrev)
"The list of active back-ends (completion engines).
Only one back-end is used at a time. The choice depends on the order of
the items in this list, and on the values they return in response to the
`prefix' command (see below). But a back-end can also be a \"grouped\"
one (see below).
`company-begin-backend' can be used to start a specific back-end,
`company-other-backend' will skip to the next matching back-end in the list.
Each back-end is a function that takes a variable number of arguments.
The first argument is the command requested from the back-end. It is one
of the following:
`prefix': The back-end should return the text to be completed. It must be
text immediately before point. Returning nil from this command passes
control to the next back-end. The function should return `stop' if it
should complete but cannot (e.g. if it is in the middle of a string).
Instead of a string, the back-end may return a cons where car is the prefix
and cdr is used instead of the actual prefix length in the comparison
against `company-minimum-prefix-length'. It must be either number or t,
and in the latter case the test automatically succeeds.
`candidates': The second argument is the prefix to be completed. The
return value should be a list of candidates that match the prefix.
Non-prefix matches are also supported (candidates that don't start with the
prefix, but match it in some backend-defined way). Backends that use this
feature must disable cache (return t to `no-cache') and might also want to
respond to `match'.
Optional commands:
`sorted': Return t here to indicate that the candidates are sorted and will
not need to be sorted again.
`duplicates': If non-nil, company will take care of removing duplicates
from the list.
`no-cache': Usually company doesn't ask for candidates again as completion
progresses, unless the back-end returns t for this command. The second
argument is the latest prefix.
`ignore-case': Return t here if the backend returns case-insensitive
matches. This value is used to determine the longest common prefix (as
used in `company-complete-common'), and to filter completions when fetching
them from cache.
`meta': The second argument is a completion candidate. Return a (short)
documentation string for it.
`doc-buffer': The second argument is a completion candidate. Return a
buffer with documentation for it. Preferably use `company-doc-buffer'. If
not all buffer contents pertain to this candidate, return a cons of buffer
and window start position.
`location': The second argument is a completion candidate. Return a cons
of buffer and buffer location, or of file and line number where the
completion candidate was defined.
`annotation': The second argument is a completion candidate. Return a
string to be displayed inline with the candidate in the popup. If
duplicates are removed by company, candidates with equal string values will
be kept if they have different annotations. For that to work properly,
backends should store the related information on candidates using text
properties.
`match': The second argument is a completion candidate. Return the index
after the end of text matching `prefix' within the candidate string. It
will be used when rendering the popup. This command only makes sense for
backends that provide non-prefix completion.
`require-match': If this returns t, the user is not allowed to enter
anything not offered as a candidate. Please don't use that value in normal
backends. The default value nil gives the user that choice with
`company-require-match'. Return value `never' overrides that option the
other way around.
`init': Called once for each buffer. The back-end can check for external
programs and files and load any required libraries. Raising an error here
will show up in message log once, and the back-end will not be used for
completion.
`post-completion': Called after a completion candidate has been inserted
into the buffer. The second argument is the candidate. Can be used to
modify it, e.g. to expand a snippet.
The back-end should return nil for all commands it does not support or
does not know about. It should also be callable interactively and use
`company-begin-backend' to start itself in that case.
Grouped back-ends:
An element of `company-backends' can also itself be a list of back-ends,
then it's considered to be a \"grouped\" back-end.
When possible, commands taking a candidate as an argument are dispatched to
the back-end it came from. In other cases, the first non-nil value among
all the back-ends is returned.
The latter is the case for the `prefix' command. But if the group contains
the keyword `:with', the back-ends after it are ignored for this command.
The completions from back-ends in a group are merged (but only from those
that return the same `prefix').
Asynchronous back-ends:
The return value of each command can also be a cons (:async . FETCHER)
where FETCHER is a function of one argument, CALLBACK. When the data
arrives, FETCHER must call CALLBACK and pass it the appropriate return
value, as described above.
True asynchronous operation is only supported for command `candidates', and
only during idle completion. Other commands will block the user interface,
even if the back-end uses the asynchronous calling convention."
:type `(repeat
(choice
:tag "Back-end"
,@(mapcar (lambda (b) `(const :tag ,(cdr b) ,(car b)))
company-safe-backends)
(symbol :tag "User defined")
(repeat :tag "Merged Back-ends"
(choice :tag "Back-end"
,@(mapcar (lambda (b)
`(const :tag ,(cdr b) ,(car b)))
company-safe-backends)
(const :tag "With" :with)
(symbol :tag "User defined"))))))
(put 'company-backends 'safe-local-variable 'company-safe-backends-p)
(defcustom company-transformers nil
"Functions to change the list of candidates received from backends.
Each function gets called with the return value of the previous one.
The first one gets passed the list of candidates, already sorted and
without duplicates."
:type '(choice
(const :tag "None" nil)
(const :tag "Sort by occurrence" (company-sort-by-occurrence))
(const :tag "Sort by back-end importance"
(company-sort-by-backend-importance))
(repeat :tag "User defined" (function))))
(defcustom company-completion-started-hook nil
"Hook run when company starts completing.
The hook is called with one argument that is non-nil if the completion was
started manually."
:type 'hook)
(defcustom company-completion-cancelled-hook nil
"Hook run when company cancels completing.
The hook is called with one argument that is non-nil if the completion was
aborted manually."
:type 'hook)
(defcustom company-completion-finished-hook nil
"Hook run when company successfully completes.
The hook is called with the selected candidate as an argument.
If you indend to use it to post-process candidates from a specific
back-end, consider using the `post-completion' command instead."
:type 'hook)
(defcustom company-minimum-prefix-length 3
"The minimum prefix length for idle completion."
:type '(integer :tag "prefix length"))
(defcustom company-abort-manual-when-too-short nil
"If enabled, cancel a manually started completion when the prefix gets
shorter than both `company-minimum-prefix-length' and the length of the
prefix it was started from."
:type 'boolean
:package-version '(company . "0.8.0"))
(defcustom company-require-match 'company-explicit-action-p
"If enabled, disallow non-matching input.
This can be a function do determine if a match is required.
This can be overridden by the back-end, if it returns t or `never' to
`require-match'. `company-auto-complete' also takes precedence over this."
:type '(choice (const :tag "Off" nil)
(function :tag "Predicate function")
(const :tag "On, if user interaction took place"
'company-explicit-action-p)
(const :tag "On" t)))
(defcustom company-auto-complete nil
"Determines when to auto-complete.
If this is enabled, all characters from `company-auto-complete-chars'
trigger insertion of the selected completion candidate.
This can also be a function."
:type '(choice (const :tag "Off" nil)
(function :tag "Predicate function")
(const :tag "On, if user interaction took place"
'company-explicit-action-p)
(const :tag "On" t)))
(defcustom company-auto-complete-chars '(?\ ?\) ?.)
"Determines which characters trigger auto-completion.
See `company-auto-complete'. If this is a string, each string character
tiggers auto-completion. If it is a list of syntax description characters (see
`modify-syntax-entry'), all characters with that syntax auto-complete.
This can also be a function, which is called with the new input and should
return non-nil if company should auto-complete.
A character that is part of a valid candidate never triggers auto-completion."
:type '(choice (string :tag "Characters")
(set :tag "Syntax"
(const :tag "Whitespace" ?\ )
(const :tag "Symbol" ?_)
(const :tag "Opening parentheses" ?\()
(const :tag "Closing parentheses" ?\))
(const :tag "Word constituent" ?w)
(const :tag "Punctuation." ?.)
(const :tag "String quote." ?\")
(const :tag "Paired delimiter." ?$)
(const :tag "Expression quote or prefix operator." ?\')
(const :tag "Comment starter." ?<)
(const :tag "Comment ender." ?>)
(const :tag "Character-quote." ?/)
(const :tag "Generic string fence." ?|)
(const :tag "Generic comment fence." ?!))
(function :tag "Predicate function")))
(defcustom company-idle-delay .5
"The idle delay in seconds until completion starts automatically.
The prefix still has to satisfy `company-minimum-prefix-length' before that
happens. The value of nil means no idle completion."
:type '(choice (const :tag "never (nil)" nil)
(const :tag "immediate (0)" 0)
(number :tag "seconds")))
(defcustom company-begin-commands '(self-insert-command
org-self-insert-command
orgtbl-self-insert-command
c-scope-operator
c-electric-colon
c-electric-lt-gt
c-electric-slash)
"A list of commands after which idle completion is allowed.
If this is t, it can show completions after any command except a few from a
pre-defined list. See `company-idle-delay'.
Alternatively, any command with a non-nil `company-begin' property is
treated as if it was on this list."
:type '(choice (const :tag "Any command" t)
(const :tag "Self insert command" '(self-insert-command))
(repeat :tag "Commands" function))
:package-version '(company . "0.8.4"))
(defcustom company-continue-commands '(not save-buffer save-some-buffers
save-buffers-kill-terminal
save-buffers-kill-emacs)
"A list of commands that are allowed during completion.
If this is t, or if `company-begin-commands' is t, any command is allowed.
Otherwise, the value must be a list of symbols. If it starts with `not',
the cdr is the list of commands that abort completion. Otherwise, all
commands except those in that list, or in `company-begin-commands', or
commands in the `company-' namespace, abort completion."
:type '(choice (const :tag "Any command" t)
(cons :tag "Any except"
(const not)
(repeat :tag "Commands" function))
(repeat :tag "Commands" function)))
(defcustom company-show-numbers nil
"If enabled, show quick-access numbers for the first ten candidates."
:type '(choice (const :tag "off" nil)
(const :tag "on" t)))
(defcustom company-selection-wrap-around nil
"If enabled, selecting item before first or after last wraps around."
:type '(choice (const :tag "off" nil)
(const :tag "on" t)))
(defvar company-async-wait 0.03
"Pause between checks to see if the value's been set when turning an
asynchronous call into synchronous.")
(defvar company-async-timeout 2
"Maximum wait time for a value to be set during asynchronous call.")
;;; mode ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar company-mode-map (make-sparse-keymap)
"Keymap used by `company-mode'.")
(defvar company-active-map
(let ((keymap (make-sparse-keymap)))
(define-key keymap "\e\e\e" 'company-abort)
(define-key keymap "\C-g" 'company-abort)
(define-key keymap (kbd "M-n") 'company-select-next)
(define-key keymap (kbd "M-p") 'company-select-previous)
(define-key keymap (kbd "<down>") 'company-select-next-or-abort)
(define-key keymap (kbd "<up>") 'company-select-previous-or-abort)
(define-key keymap [remap scroll-up-command] 'company-next-page)
(define-key keymap [remap scroll-down-command] 'company-previous-page)
(define-key keymap [down-mouse-1] 'ignore)
(define-key keymap [down-mouse-3] 'ignore)
(define-key keymap [mouse-1] 'company-complete-mouse)
(define-key keymap [mouse-3] 'company-select-mouse)
(define-key keymap [up-mouse-1] 'ignore)
(define-key keymap [up-mouse-3] 'ignore)
(define-key keymap [return] 'company-complete-selection)
(define-key keymap (kbd "RET") 'company-complete-selection)
(define-key keymap [tab] 'company-complete-common)
(define-key keymap (kbd "TAB") 'company-complete-common)
(define-key keymap (kbd "<f1>") 'company-show-doc-buffer)
(define-key keymap (kbd "C-h") 'company-show-doc-buffer)
(define-key keymap "\C-w" 'company-show-location)
(define-key keymap "\C-s" 'company-search-candidates)
(define-key keymap "\C-\M-s" 'company-filter-candidates)
(dotimes (i 10)
(define-key keymap (read-kbd-macro (format "M-%d" i)) 'company-complete-number))
keymap)
"Keymap that is enabled during an active completion.")
(defvar company--disabled-backends nil)
(defun company-init-backend (backend)
(and (symbolp backend)
(not (fboundp backend))
(ignore-errors (require backend nil t)))
(cond
((symbolp backend)
(condition-case err
(progn
(funcall backend 'init)
(put backend 'company-init t))
(error
(put backend 'company-init 'failed)
(unless (memq backend company--disabled-backends)
(message "Company back-end '%s' could not be initialized:\n%s"
backend (error-message-string err)))
(cl-pushnew backend company--disabled-backends)
nil)))
;; No initialization for lambdas.
((functionp backend) t)
(t ;; Must be a list.
(cl-dolist (b backend)
(unless (keywordp b)
(company-init-backend b))))))
(defcustom company-lighter-base "company"
"Base string to use for the `company-mode' lighter."
:type 'string
:package-version '(company . "0.8.10"))
(defvar company-lighter '(" "
(company-candidates
(:eval
(if (consp company-backend)
(company--group-lighter (nth company-selection
company-candidates)
company-lighter-base)
(symbol-name company-backend)))
company-lighter-base))
"Mode line lighter for Company.
The value of this variable is a mode line template as in
`mode-line-format'.")
(put 'company-lighter 'risky-local-variable t)
;;;###autoload
(define-minor-mode company-mode
"\"complete anything\"; is an in-buffer completion framework.
Completion starts automatically, depending on the values
`company-idle-delay' and `company-minimum-prefix-length'.
Completion can be controlled with the commands:
`company-complete-common', `company-complete-selection', `company-complete',
`company-select-next', `company-select-previous'. If these commands are
called before `company-idle-delay', completion will also start.
Completions can be searched with `company-search-candidates' or
`company-filter-candidates'. These can be used while completion is
inactive, as well.
The completion data is retrieved using `company-backends' and displayed
using `company-frontends'. If you want to start a specific back-end, call
it interactively or use `company-begin-backend'.
By default, the completions list is sorted alphabetically, unless the
backend chooses otherwise, or `company-transformers' changes it later.
regular keymap (`company-mode-map'):
\\{company-mode-map}
keymap during active completions (`company-active-map'):
\\{company-active-map}"
nil company-lighter company-mode-map
(if company-mode
(progn
(when (eq company-idle-delay t)
(setq company-idle-delay 0)
(warn "Setting `company-idle-delay' to t is deprecated. Set it to 0 instead."))
(add-hook 'pre-command-hook 'company-pre-command nil t)
(add-hook 'post-command-hook 'company-post-command nil t)
(mapc 'company-init-backend company-backends))
(remove-hook 'pre-command-hook 'company-pre-command t)
(remove-hook 'post-command-hook 'company-post-command t)
(company-cancel)
(kill-local-variable 'company-point)))
(defcustom company-global-modes t
"Modes for which `company-mode' mode is turned on by `global-company-mode'.
If nil, means no modes. If t, then all major modes have it turned on.
If a list, it should be a list of `major-mode' symbol names for which
`company-mode' should be automatically turned on. The sense of the list is
negated if it begins with `not'. For example:
(c-mode c++-mode)
means that `company-mode' is turned on for buffers in C and C++ modes only.
(not message-mode)
means that `company-mode' is always turned on except in `message-mode' buffers."
:type '(choice (const :tag "none" nil)
(const :tag "all" t)
(set :menu-tag "mode specific" :tag "modes"
:value (not)
(const :tag "Except" not)
(repeat :inline t (symbol :tag "mode")))))
;;;###autoload
(define-globalized-minor-mode global-company-mode company-mode company-mode-on)
(defun company-mode-on ()
(when (and (not (or noninteractive (eq (aref (buffer-name) 0) ?\s)))
(cond ((eq company-global-modes t)
t)
((eq (car-safe company-global-modes) 'not)
(not (memq major-mode (cdr company-global-modes))))
(t (memq major-mode company-global-modes))))
(company-mode 1)))
(defsubst company-assert-enabled ()
(unless company-mode
(company-uninstall-map)
(error "Company not enabled")))
;;; keymaps ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar-local company-my-keymap nil)
(defvar company-emulation-alist '((t . nil)))
(defsubst company-enable-overriding-keymap (keymap)
(company-uninstall-map)
(setq company-my-keymap keymap))
(defun company-ensure-emulation-alist ()
(unless (eq 'company-emulation-alist (car emulation-mode-map-alists))
(setq emulation-mode-map-alists
(cons 'company-emulation-alist
(delq 'company-emulation-alist emulation-mode-map-alists)))))
(defun company-install-map ()
(unless (or (cdar company-emulation-alist)
(null company-my-keymap))
(setf (cdar company-emulation-alist) company-my-keymap)))
(defun company-uninstall-map ()
(setf (cdar company-emulation-alist) nil))
;; Hack:
;; Emacs calculates the active keymaps before reading the event. That means we
;; cannot change the keymap from a timer. So we send a bogus command.
;; XXX: Even in Emacs 24.4, seems to be needed in the terminal.
(defun company-ignore ()
(interactive)
(setq this-command last-command))
(global-set-key '[company-dummy-event] 'company-ignore)
(defun company-input-noop ()
(push 'company-dummy-event unread-command-events))
(defun company--posn-col-row (posn)
(let ((col (car (posn-col-row posn)))
;; `posn-col-row' doesn't work well with lines of different height.
;; `posn-actual-col-row' doesn't handle multiple-width characters.
(row (cdr (posn-actual-col-row posn))))
(when (and header-line-format (version< emacs-version "24.3.93.3"))
;; http://debbugs.gnu.org/18384
(cl-decf row))
(cons (+ col (window-hscroll)) row)))
(defun company--col-row (&optional pos)
(company--posn-col-row (posn-at-point pos)))
(defun company--row (&optional pos)
(cdr (company--col-row pos)))
;;; backends ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar-local company-backend nil)
(defun company-grab (regexp &optional expression limit)
(when (looking-back regexp limit)
(or (match-string-no-properties (or expression 0)) "")))
(defun company-grab-line (regexp &optional expression)
(company-grab regexp expression (point-at-bol)))
(defun company-grab-symbol ()
(if (looking-at "\\_>")
(buffer-substring (point) (save-excursion (skip-syntax-backward "w_")
(point)))
(unless (and (char-after) (memq (char-syntax (char-after)) '(?w ?_)))
"")))
(defun company-grab-word ()
(if (looking-at "\\>")
(buffer-substring (point) (save-excursion (skip-syntax-backward "w")
(point)))
(unless (and (char-after) (eq (char-syntax (char-after)) ?w))
"")))
(defun company-grab-symbol-cons (idle-begin-after-re &optional max-len)
(let ((symbol (company-grab-symbol)))
(when symbol
(save-excursion
(forward-char (- (length symbol)))
(if (looking-back idle-begin-after-re (if max-len
(- (point) max-len)
(line-beginning-position)))
(cons symbol t)
symbol)))))
(defun company-in-string-or-comment ()
(let ((ppss (syntax-ppss)))
(or (car (setq ppss (nthcdr 3 ppss)))
(car (setq ppss (cdr ppss)))
(nth 3 ppss))))
(defun company-call-backend (&rest args)
(company--force-sync #'company-call-backend-raw args company-backend))
(defun company--force-sync (fun args backend)
(let ((value (apply fun args)))
(if (not (eq (car-safe value) :async))
value
(let ((res 'trash)
(start (time-to-seconds)))
(funcall (cdr value)
(lambda (result) (setq res result)))
(while (eq res 'trash)
(if (> (- (time-to-seconds) start) company-async-timeout)
(error "Company: Back-end %s async timeout with args %s"
backend args)
(sleep-for company-async-wait)))
res))))
(defun company-call-backend-raw (&rest args)
(condition-case-unless-debug err
(if (functionp company-backend)
(apply company-backend args)
(apply #'company--multi-backend-adapter company-backend args))
(error (error "Company: Back-end %s error \"%s\" with args %s"
company-backend (error-message-string err) args))))
(defun company--multi-backend-adapter (backends command &rest args)
(let ((backends (cl-loop for b in backends
when (not (and (symbolp b)
(eq 'failed (get b 'company-init))))
collect b)))
(setq backends
(if (eq command 'prefix)
(butlast backends (length (member :with backends)))
(delq :with backends)))
(pcase command
(`candidates
(company--multi-backend-adapter-candidates backends (car args)))
(`sorted nil)
(`duplicates t)
((or `prefix `ignore-case `no-cache `require-match)
(let (value)
(cl-dolist (backend backends)
(when (setq value (company--force-sync
backend (cons command args) backend))
(cl-return value)))))
(_
(let ((arg (car args)))
(when (> (length arg) 0)
(let ((backend (or (get-text-property 0 'company-backend arg)
(car backends))))
(apply backend command args))))))))
(defun company--multi-backend-adapter-candidates (backends prefix)
(let ((pairs (cl-loop for backend in (cdr backends)
when (equal (company--prefix-str
(funcall backend 'prefix))
prefix)
collect (cons (funcall backend 'candidates prefix)
(let ((b backend))
(lambda (candidates)
(mapcar
(lambda (str)
(propertize str 'company-backend b))
candidates)))))))
(when (equal (company--prefix-str (funcall (car backends) 'prefix)) prefix)
;; Small perf optimization: don't tag the candidates received
;; from the first backend in the group.
(push (cons (funcall (car backends) 'candidates prefix)
'identity)
pairs))
(company--merge-async pairs (lambda (values) (apply #'append values)))))
(defun company--merge-async (pairs merger)
(let ((async (cl-loop for pair in pairs
thereis
(eq :async (car-safe (car pair))))))
(if (not async)
(funcall merger (cl-loop for (val . mapper) in pairs
collect (funcall mapper val)))
(cons
:async
(lambda (callback)
(let* (lst
(pending (mapcar #'car pairs))
(finisher (lambda ()
(unless pending
(funcall callback
(funcall merger
(nreverse lst)))))))
(dolist (pair pairs)
(push nil lst)
(let* ((cell lst)
(val (car pair))
(mapper (cdr pair))
(this-finisher (lambda (res)
(setq pending (delq val pending))
(setcar cell (funcall mapper res))
(funcall finisher))))
(if (not (eq :async (car-safe val)))
(funcall this-finisher val)
(let ((fetcher (cdr val)))
(funcall fetcher this-finisher)))))))))))
(defun company--prefix-str (prefix)
(or (car-safe prefix) prefix))
;;; completion mechanism ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar-local company-prefix nil)
(defvar-local company-candidates nil)
(defvar-local company-candidates-length nil)
(defvar-local company-candidates-cache nil)
(defvar-local company-candidates-predicate nil)
(defvar-local company-common nil)
(defvar-local company-selection 0)
(defvar-local company-selection-changed nil)
(defvar-local company--manual-action nil
"Non-nil, if manual completion took place.")
(defvar-local company--manual-prefix nil)
(defvar company--auto-completion nil
"Non-nil when current candidate is being inserted automatically.
Controlled by `company-auto-complete'.")
(defvar-local company--point-max nil)
(defvar-local company-point nil)