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auto-complete.el
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;;; auto-complete.el --- Auto Completion for GNU Emacs
;; Copyright (C) 2008, 2009, 2010 Tomohiro Matsuyama
;; Author: Tomohiro Matsuyama <[email protected]>
;; URL: http://cx4a.org/software/auto-complete
;; Keywords: completion, convenience
;; Version: 1.4
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; This extension provides a way to complete with popup menu like:
;;
;; def-!-
;; +-----------------+
;; |defun::::::::::::|
;; |defvar |
;; |defmacro |
;; | ... |
;; +-----------------+
;;
;; You can complete by typing and selecting menu.
;;
;; Entire documents are located in doc/ directory.
;; Take a look for information.
;;
;; Enjoy!
;;; Code:
(eval-when-compile
(require 'cl))
(require 'popup)
;;;; Global stuff
(defun ac-error (&optional var)
"Report an error and disable `auto-complete-mode'."
(ignore-errors
(message "auto-complete error: %s" var)
(auto-complete-mode -1)
var))
;;;; Customization
(defgroup auto-complete nil
"Auto completion."
:group 'completion
:prefix "ac-")
(defcustom ac-delay 0.1
"Delay to completions will be available."
:type 'float
:group 'auto-complete)
(defcustom ac-auto-show-menu 0.8
"Non-nil means completion menu will be automatically shown."
:type '(choice (const :tag "Yes" t)
(const :tag "Never" nil)
(float :tag "Timer"))
:group 'auto-complete)
(defcustom ac-show-menu-immediately-on-auto-complete t
"Non-nil means menu will be showed immediately on `auto-complete'."
:type 'boolean
:group 'auto-complete)
(defcustom ac-expand-on-auto-complete t
"Non-nil means expand whole common part on first time `auto-complete'."
:type 'boolean
:group 'auto-complete)
(defcustom ac-disable-faces '(font-lock-comment-face font-lock-string-face font-lock-doc-face)
"Non-nil means disable automatic completion on specified faces."
:type '(repeat symbol)
:group 'auto-complete)
(defcustom ac-stop-flymake-on-completing t
"Non-nil means disble flymake temporarily on completing."
:type 'boolean
:group 'auto-complete)
(defcustom ac-use-fuzzy t
"Non-nil means use fuzzy matching."
:type 'boolean
:group 'auto-complete)
(defcustom ac-fuzzy-cursor-color "red"
"Cursor color in fuzzy mode."
:type 'string
:group 'auto-complete)
(defcustom ac-use-comphist t
"Non-nil means use intelligent completion history."
:type 'boolean
:group 'auto-complete)
(defcustom ac-comphist-threshold 0.7
"Percentage of ignoring low scored candidates."
:type 'float
:group 'auto-complete)
(defcustom ac-comphist-file
(expand-file-name (concat (if (boundp 'user-emacs-directory)
user-emacs-directory
"~/.emacs.d/")
"/ac-comphist.dat"))
"Completion history file name."
:type 'string
:group 'auto-complete)
(defcustom ac-user-dictionary nil
"User defined dictionary"
:type '(repeat string)
:group 'auto-complete)
(defcustom ac-dictionary-files '("~/.dict")
"Dictionary files."
:type '(repeat string)
:group 'auto-complete)
(defvaralias 'ac-user-dictionary-files 'ac-dictionary-files)
(defcustom ac-dictionary-directories nil
"Dictionary directories."
:type '(repeat string)
:group 'auto-complete)
(defcustom ac-use-quick-help t
"Non-nil means use quick help."
:type 'boolean
:group 'auto-complete)
(defcustom ac-quick-help-delay 1.5
"Delay to show quick help."
:type 'float
:group 'auto-complete)
(defcustom ac-menu-height 10
"Max height of candidate menu."
:type 'integer
:group 'auto-complete)
(defvaralias 'ac-candidate-menu-height 'ac-menu-height)
(defcustom ac-quick-help-height 20
"Max height of quick help."
:type 'integer
:group 'auto-complete)
(defcustom ac-quick-help-prefer-pos-tip t
"Prefer native tooltip with pos-tip than overlay popup for displaying quick help."
:type 'boolean
:group 'auto-complete)
(defvaralias 'ac-quick-help-prefer-x 'ac-quick-help-prefer-pos-tip)
(defcustom ac-candidate-limit nil
"Limit number of candidates. Non-integer means no limit."
:type 'integer
:group 'auto-complete)
(defvaralias 'ac-candidate-max 'ac-candidate-limit)
(defcustom ac-modes
'(emacs-lisp-mode lisp-mode lisp-interaction-mode
slime-repl-mode
c-mode cc-mode c++-mode
java-mode malabar-mode clojure-mode scala-mode
scheme-mode
ocaml-mode tuareg-mode haskell-mode
perl-mode cperl-mode python-mode ruby-mode
ecmascript-mode javascript-mode js-mode js2-mode php-mode css-mode
makefile-mode sh-mode fortran-mode f90-mode ada-mode
xml-mode sgml-mode)
"Major modes `auto-complete-mode' can run on."
:type '(repeat symbol)
:group 'auto-complete)
(defcustom ac-compatible-packages-regexp
"^ac-"
"Regexp to indicate what packages can work with auto-complete."
:type 'string
:group 'auto-complete)
(defcustom ac-non-trigger-commands
'(*table--cell-self-insert-command)
"Commands that can't be used as triggers of `auto-complete'."
:type '(repeat symbol)
:group 'auto-complete)
(defcustom ac-trigger-commands
'(self-insert-command)
"Trigger commands that specify whether `auto-complete' should start or not."
:type '(repeat symbol)
:group 'auto-complete)
(defcustom ac-trigger-commands-on-completing
'(delete-backward-char
backward-delete-char
backward-delete-char-untabify)
"Trigger commands that specify whether `auto-complete' should continue or not."
:type '(repeat symbol)
:group 'auto-complete)
(defcustom ac-trigger-key nil
"Non-nil means `auto-complete' will start by typing this key.
If you specify this TAB, for example, `auto-complete' will start by typing TAB,
and if there is no completions, an original command will be fallbacked."
:type 'string
:group 'auto-complete
:set (lambda (symbol value)
(set-default symbol value)
(when (and value
(fboundp 'ac-set-trigger-key))
(ac-set-trigger-key value))))
(defcustom ac-auto-start 2
"Non-nil means completion will be started automatically.
Positive integer means if a length of a word you entered is larger than the value,
completion will be started automatically.
If you specify `nil', never be started automatically."
:type '(choice (const :tag "Yes" t)
(const :tag "Never" nil)
(integer :tag "Require"))
:group 'auto-complete)
(defcustom ac-stop-words nil
"List of string to stop completion."
:type '(repeat string)
:group 'auto-complete)
(defvaralias 'ac-ignores 'ac-stop-words)
(defcustom ac-use-dictionary-as-stop-words t
"Non-nil means a buffer related dictionary will be thought of as stop words."
:type 'boolean
:group 'auto-complete)
(defcustom ac-ignore-case 'smart
"Non-nil means auto-complete ignores case.
If this value is `smart', auto-complete ignores case only when
a prefix doen't contain any upper case letters."
:type '(choice (const :tag "Yes" t)
(const :tag "Smart" smart)
(const :tag "No" nil))
:group 'auto-complete)
(defcustom ac-dwim t
"Non-nil means `auto-complete' works based on Do What I Mean."
:type 'boolean
:group 'auto-complete)
(defcustom ac-use-menu-map nil
"Non-nil means a special keymap `ac-menu-map' on completing menu will be used."
:type 'boolean
:group 'auto-complete)
(defcustom ac-use-overriding-local-map nil
"Non-nil means `overriding-local-map' will be used to hack for overriding key events on auto-copletion."
:type 'boolean
:group 'auto-complete)
(defface ac-completion-face
'((t (:foreground "darkgray" :underline t)))
"Face for inline completion"
:group 'auto-complete)
(defface ac-candidate-face
'((t (:background "lightgray" :foreground "black")))
"Face for candidate."
:group 'auto-complete)
(defface ac-selection-face
'((t (:background "steelblue" :foreground "white")))
"Face for selected candidate."
:group 'auto-complete)
(defvar auto-complete-mode-hook nil
"Hook for `auto-complete-mode'.")
;;;; Internal variables
(defvar auto-complete-mode nil
"Dummy variable to suppress compiler warnings.")
(defvar ac-cursor-color nil
"Old cursor color.")
(defvar ac-inline nil
"Inline completion instance.")
(defvar ac-menu nil
"Menu instance.")
(defvar ac-show-menu nil
"Flag to show menu on timer tick.")
(defvar ac-last-completion nil
"Cons of prefix marker and selected item of last completion.")
(defvar ac-quick-help nil
"Quick help instance")
(defvar ac-completing nil
"Non-nil means `auto-complete-mode' is now working on completion.")
(defvar ac-buffer nil
"Buffer where auto-complete is started.")
(defvar ac-point nil
"Start point of prefix.")
(defvar ac-last-point nil
"Last point of updating pattern.")
(defvar ac-prefix nil
"Prefix string.")
(defvaralias 'ac-target 'ac-prefix)
(defvar ac-selected-candidate nil
"Last selected candidate.")
(defvar ac-common-part nil
"Common part string of meaningful candidates.
If there is no common part, this will be nil.")
(defvar ac-whole-common-part nil
"Common part string of whole candidates.
If there is no common part, this will be nil.")
(defvar ac-prefix-overlay nil
"Overlay for prefix string.")
(defvar ac-timer nil
"Completion idle timer.")
(defvar ac-show-menu-timer nil
"Show menu idle timer.")
(defvar ac-quick-help-timer nil
"Quick help idle timer.")
(defvar ac-triggered nil
"Flag to update.")
(defvar ac-limit nil
"Limit number of candidates for each sources.")
(defvar ac-candidates nil
"Current candidates.")
(defvar ac-candidates-cache nil
"Candidates cache for individual sources.")
(defvar ac-fuzzy-enable nil
"Non-nil means fuzzy matching is enabled.")
(defvar ac-dwim-enable nil
"Non-nil means DWIM completion will be allowed.")
(defvar ac-mode-map (make-sparse-keymap)
"Auto-complete mode map. It is also used for trigger key command. See also `ac-trigger-key'.")
(defvar ac-completing-map
(let ((map (make-sparse-keymap)))
(define-key map "\t" 'ac-expand)
(define-key map "\r" 'ac-complete)
(define-key map (kbd "M-TAB") 'auto-complete)
(define-key map "\C-s" 'ac-isearch)
(define-key map "\M-n" 'ac-next)
(define-key map "\M-p" 'ac-previous)
(define-key map [down] 'ac-next)
(define-key map [up] 'ac-previous)
(define-key map [f1] 'ac-help)
(define-key map [M-f1] 'ac-persist-help)
(define-key map (kbd "C-?") 'ac-help)
(define-key map (kbd "C-M-?") 'ac-persist-help)
(define-key map [C-down] 'ac-quick-help-scroll-down)
(define-key map [C-up] 'ac-quick-help-scroll-up)
(define-key map "\C-\M-n" 'ac-quick-help-scroll-down)
(define-key map "\C-\M-p" 'ac-quick-help-scroll-up)
(dotimes (i 9)
(let ((symbol (intern (format "ac-complete-%d" (1+ i)))))
(fset symbol
`(lambda ()
(interactive)
(when (and (ac-menu-live-p) (popup-select ac-menu ,i))
(ac-complete))))
(define-key map (read-kbd-macro (format "M-%s" (1+ i))) symbol)))
map)
"Keymap for completion.")
(defvaralias 'ac-complete-mode-map 'ac-completing-map)
(defvar ac-menu-map
(let ((map (make-sparse-keymap)))
(define-key map "\C-n" 'ac-next)
(define-key map "\C-p" 'ac-previous)
(set-keymap-parent map ac-completing-map)
map)
"Keymap for completion on completing menu.")
(defvar ac-current-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map ac-completing-map)
map))
(defvar ac-match-function 'all-completions
"Default match function.")
(defvar ac-prefix-definitions
'((symbol . ac-prefix-symbol)
(file . ac-prefix-file)
(valid-file . ac-prefix-valid-file)
(c-dot . ac-prefix-c-dot)
(c-dot-ref . ac-prefix-c-dot-ref))
"Prefix definitions for common use.")
(defvar ac-sources '(ac-source-words-in-same-mode-buffers)
"Sources for completion.")
(make-variable-buffer-local 'ac-sources)
(defvar ac-compiled-sources nil
"Compiled source of `ac-sources'.")
(defvar ac-current-sources nil
"Current working sources. This is sublist of `ac-compiled-sources'.")
(defvar ac-omni-completion-sources nil
"Do not use this anymore.")
(defvar ac-current-prefix-def nil)
(defvar ac-ignoring-prefix-def nil)
;;;; Intelligent completion history
(defvar ac-comphist nil
"Database of completion history.")
(defsubst ac-comphist-make-tab ()
(make-hash-table :test 'equal))
(defsubst ac-comphist-tab (db)
(nth 0 db))
(defsubst ac-comphist-cache (db)
(nth 1 db))
(defun ac-comphist-make (&optional tab)
(list (or tab (ac-comphist-make-tab)) (make-hash-table :test 'equal :weakness t)))
(defun ac-comphist-get (db string &optional create)
(let* ((tab (ac-comphist-tab db))
(index (gethash string tab)))
(when (and create (null index))
(setq index (make-vector (length string) 0))
(puthash string index tab))
index))
(defun ac-comphist-add (db string prefix)
(setq prefix (min prefix (1- (length string))))
(when (<= 0 prefix)
(setq string (substring-no-properties string))
(let ((stat (ac-comphist-get db string t)))
(incf (aref stat prefix))
(remhash string (ac-comphist-cache db)))))
(defun ac-comphist-score (db string prefix)
(setq prefix (min prefix (1- (length string))))
(if (<= 0 prefix)
(let ((cache (gethash string (ac-comphist-cache db))))
(or (and cache (aref cache prefix))
(let ((stat (ac-comphist-get db string))
(score 0.0))
(when stat
(loop for p from 0 below (length string)
;; sigmoid function
with a = 5
with b = (/ 700.0 a) ; bounds for avoiding range error in `exp'
with d = (/ 6.0 a)
for x = (max (- b) (min b (- d (abs (- prefix p)))))
for r = (/ 1.0 (1+ (exp (* (- a) x))))
do
(incf score (* (aref stat p) r))))
;; Weight by distance
(incf score (max 0.0 (- 0.3 (/ (- (length string) prefix) 100.0))))
(unless cache
(setq cache (make-vector (length string) nil))
(puthash string cache (ac-comphist-cache db)))
(aset cache prefix score)
score)))
0.0))
(defun ac-comphist-sort (db collection prefix &optional threshold)
(let (result
(n 0)
(total 0)
(cur 0))
(setq result (mapcar (lambda (a)
(when (and cur threshold)
(if (>= cur (* total threshold))
(setq cur nil)
(incf n)
(incf cur (cdr a))))
(car a))
(sort (mapcar (lambda (string)
(let ((score (ac-comphist-score db string prefix)))
(incf total score)
(cons string score)))
collection)
(lambda (a b) (< (cdr b) (cdr a))))))
(if threshold
(cons n result)
result)))
(defun ac-comphist-serialize (db)
(let (alist)
(maphash (lambda (k v)
(push (cons k v) alist))
(ac-comphist-tab db))
(list alist)))
(defun ac-comphist-deserialize (sexp)
(condition-case nil
(ac-comphist-make (let ((tab (ac-comphist-make-tab)))
(mapc (lambda (cons)
(puthash (car cons) (cdr cons) tab))
(nth 0 sexp))
tab))
(error (message "Invalid comphist db.") nil)))
(defun ac-comphist-init ()
(ac-comphist-load)
(add-hook 'kill-emacs-hook 'ac-comphist-save))
(defun ac-comphist-load ()
(interactive)
(let ((db (if (file-exists-p ac-comphist-file)
(ignore-errors
(with-temp-buffer
(insert-file-contents ac-comphist-file)
(goto-char (point-min))
(ac-comphist-deserialize (read (current-buffer))))))))
(setq ac-comphist (or db (ac-comphist-make)))))
(defun ac-comphist-save ()
(interactive)
(require 'pp)
(ignore-errors
(with-temp-buffer
(pp (ac-comphist-serialize ac-comphist) (current-buffer))
(write-region (point-min) (point-max) ac-comphist-file))))
;;;; Dictionary
(defvar ac-buffer-dictionary nil)
(defvar ac-file-dictionary (make-hash-table :test 'equal))
(defun ac-clear-dictionary-cache ()
(interactive)
(dolist (buffer (buffer-list))
(with-current-buffer buffer
(if (local-variable-p 'ac-buffer-dictionary)
(kill-local-variable 'ac-buffer-dictionary))))
(clrhash ac-file-dictionary))
(defun ac-file-dictionary (filename)
(let ((cache (gethash filename ac-file-dictionary 'none)))
(if (and cache (not (eq cache 'none)))
cache
(let (result)
(ignore-errors
(with-temp-buffer
(insert-file-contents filename)
(setq result (split-string (buffer-string) "\n"))))
(puthash filename result ac-file-dictionary)
result))))
(defun ac-mode-dictionary (mode)
(loop for name in (cons (symbol-name mode)
(ignore-errors (list (file-name-extension (buffer-file-name)))))
for dir in ac-dictionary-directories
for file = (concat dir "/" name)
if (file-exists-p file)
append (ac-file-dictionary file)))
(defun ac-buffer-dictionary (&optional buffer)
(with-current-buffer (or buffer (current-buffer))
(if (local-variable-p 'ac-buffer-dictionary)
ac-buffer-dictionary
(make-local-variable 'ac-buffer-dictionary)
(setq ac-buffer-dictionary
(apply 'append
ac-user-dictionary
(ac-mode-dictionary major-mode)
(mapcar 'ac-file-dictionary ac-dictionary-files))))))
;;;; Auto completion internals
(defun ac-menu-at-wrapper-line-p ()
"Return non-nil if current line is long and wrapped to next visual line."
(and (not truncate-lines)
(eq (line-beginning-position)
(save-excursion
(vertical-motion 1)
(line-beginning-position)))))
(defun ac-stop-word-p (word)
(or (member word ac-stop-words)
(if ac-use-dictionary-as-stop-words
(member word (ac-buffer-dictionary)))))
(defun ac-prefix-symbol ()
"Default prefix definition function."
(require 'thingatpt)
(car-safe (bounds-of-thing-at-point 'symbol)))
(defalias 'ac-prefix-default 'ac-prefix-symbol)
(defun ac-prefix-file ()
"File prefix."
(let ((point (re-search-backward "[\"<>' \t\r\n]" nil t)))
(if point (1+ point))))
(defun ac-prefix-valid-file ()
"Existed (or to be existed) file prefix."
(let* ((line-beg (line-beginning-position))
(end (point))
(start (or (let ((point (re-search-backward "[\"<>'= \t\r\n]" line-beg t)))
(if point (1+ point)))
line-beg))
(file (buffer-substring start end)))
(if (and file (or (string-match "^/" file)
(and (setq file (and (string-match "^[^/]*/" file)
(match-string 0 file)))
(file-directory-p file))))
start)))
(defun ac-prefix-c-dot ()
"C-like languages dot(.) prefix."
(if (re-search-backward "\\.\\(\\(?:[a-zA-Z0-9][_a-zA-Z0-9]*\\)?\\)\\=" nil t)
(match-beginning 1)))
(defun ac-prefix-c-dot-ref ()
"C-like languages dot(.) and reference(->) prefix."
(if (re-search-backward "\\(?:\\.\\|->\\)\\(\\(?:[a-zA-Z0-9][_a-zA-Z0-9]*\\)?\\)\\=" nil t)
(match-beginning 1)))
(defun ac-define-prefix (name prefix)
"Define new prefix definition.
You can not use it in source definition like (prefix . `NAME')."
(push (cons name prefix) ac-prefix-definitions))
(defun ac-match-substring (prefix candidates)
(loop with regexp = (regexp-quote prefix)
for candidate in candidates
if (string-match regexp candidate)
collect candidate))
(defsubst ac-source-entity (source)
(if (symbolp source)
(symbol-value source)
source))
(defun ac-source-available-p (source)
(if (and (symbolp source)
(get source 'available))
(eq (get source 'available) t)
(let* ((src (ac-source-entity source))
(avail-pair (assq 'available src))
(avail-cond (cdr avail-pair))
(available (and (if avail-pair
(cond
((symbolp avail-cond)
(funcall avail-cond))
((listp avail-cond)
(eval avail-cond)))
t)
(loop for feature in (assoc-default 'depends src)
unless (require feature nil t) return nil
finally return t))))
(if (symbolp source)
(put source 'available (if available t 'no)))
available)))
(defun ac-compile-sources (sources)
"Compiled `SOURCES' into expanded sources style."
(loop for source in sources
if (ac-source-available-p source)
do
(setq source (ac-source-entity source))
(flet ((add-attribute (name value &optional append) (add-to-list 'source (cons name value) append)))
;; prefix
(let* ((prefix (assoc 'prefix source))
(real (assoc-default (cdr prefix) ac-prefix-definitions)))
(cond
(real
(add-attribute 'prefix real))
((null prefix)
(add-attribute 'prefix 'ac-prefix-default))))
;; match
(let ((match (assq 'match source)))
(cond
((eq (cdr match) 'substring)
(setcdr match 'ac-match-substring)))))
and collect source))
(defun ac-compiled-sources ()
(or ac-compiled-sources
(setq ac-compiled-sources
(ac-compile-sources ac-sources))))
(defsubst ac-menu-live-p ()
(popup-live-p ac-menu))
(defun ac-menu-create (point width height)
(setq ac-menu
(popup-create point width height
:around t
:face 'ac-candidate-face
:selection-face 'ac-selection-face
:symbol t
:scroll-bar t
:margin-left 1)))
(defun ac-menu-delete ()
(when ac-menu
(popup-delete ac-menu)
(setq ac-menu)))
(defsubst ac-inline-marker ()
(nth 0 ac-inline))
(defsubst ac-inline-overlay ()
(nth 1 ac-inline))
(defsubst ac-inline-live-p ()
(and ac-inline (ac-inline-overlay) t))
(defun ac-inline-show (point string)
(unless ac-inline
(setq ac-inline (list (make-marker) nil)))
(save-excursion
(let ((overlay (ac-inline-overlay))
(width 0)
(string-width (string-width string))
(length 0)
(original-string string))
;; Calculate string space to show completion
(goto-char point)
(let (c)
(while (and (not (eolp))
(< width string-width)
(setq c (char-after))
(not (eq c ?\t))) ; special case for tab
(incf width (char-width c))
(incf length)
(forward-char)))
;; Show completion
(goto-char point)
(cond
((= width 0)
(set-marker (ac-inline-marker) point)
(let ((buffer-undo-list t))
(insert " "))
(setq width 1
length 1))
((<= width string-width)
;; No space to show
;; Do nothing
)
((> width string-width)
;; Need to fill space
(setq string (concat string (make-string (- width string-width) ? )))))
(setq string (propertize string 'face 'ac-completion-face))
(if overlay
(progn
(move-overlay overlay point (+ point length))
(overlay-put overlay 'invisible nil))
(setq overlay (make-overlay point (+ point length)))
(setf (nth 1 ac-inline) overlay)
(overlay-put overlay 'priority 9999)
;; Help prefix-overlay in some cases
(overlay-put overlay 'keymap ac-current-map))
(overlay-put overlay 'display (substring string 0 1))
;; TODO no width but char
(overlay-put overlay 'after-string (substring string 1))
(overlay-put overlay 'string original-string))))
(defun ac-inline-delete ()
(when (ac-inline-live-p)
(ac-inline-hide)
(delete-overlay (ac-inline-overlay))
(setq ac-inline nil)))
(defun ac-inline-hide ()
(when (ac-inline-live-p)
(let ((overlay (ac-inline-overlay))
(marker (ac-inline-marker))
(buffer-undo-list t))
(when overlay
(when (marker-position marker)
(save-excursion
(goto-char marker)
(delete-char 1)
(set-marker marker nil)))
(move-overlay overlay (point-min) (point-min))
(overlay-put overlay 'invisible t)
(overlay-put overlay 'display nil)
(overlay-put overlay 'after-string nil)))))
(defun ac-inline-update ()
(if (and ac-completing ac-prefix (stringp ac-common-part))
(let ((common-part-length (length ac-common-part))
(prefix-length (length ac-prefix)))
(if (> common-part-length prefix-length)
(progn
(ac-inline-hide)
(ac-inline-show (point) (substring ac-common-part prefix-length)))
(ac-inline-delete)))
(ac-inline-delete)))
(defun ac-put-prefix-overlay ()
(unless ac-prefix-overlay
(let (newline)
;; Insert newline to make sure that cursor always on the overlay
(when (and (eq ac-point (point-max))
(eq ac-point (point)))
(popup-save-buffer-state
(insert "\n"))
(setq newline t))
(setq ac-prefix-overlay (make-overlay ac-point (1+ (point)) nil t t))
(overlay-put ac-prefix-overlay 'priority 9999)
(overlay-put ac-prefix-overlay 'keymap (make-sparse-keymap))
(overlay-put ac-prefix-overlay 'newline newline))))
(defun ac-remove-prefix-overlay ()
(when ac-prefix-overlay
(when (overlay-get ac-prefix-overlay 'newline)
;; Remove inserted newline
(popup-save-buffer-state
(goto-char (point-max))
(if (eq (char-before) ?\n)
(delete-char -1))))
(delete-overlay ac-prefix-overlay)))
(defun ac-activate-completing-map ()
(if (and ac-show-menu ac-use-menu-map)
(set-keymap-parent ac-current-map ac-menu-map))
(when (and ac-use-overriding-local-map
(null overriding-terminal-local-map))
(setq overriding-terminal-local-map ac-current-map))
(when ac-prefix-overlay
(set-keymap-parent (overlay-get ac-prefix-overlay 'keymap) ac-current-map)))
(defun ac-deactivate-completing-map ()
(set-keymap-parent ac-current-map ac-completing-map)
(when (and ac-use-overriding-local-map
(eq overriding-terminal-local-map ac-current-map))
(setq overriding-terminal-local-map nil))
(when ac-prefix-overlay
(set-keymap-parent (overlay-get ac-prefix-overlay 'keymap) nil)))
(defsubst ac-selected-candidate ()
(if ac-menu
(popup-selected-item ac-menu)))
(defun ac-prefix (requires ignore-list)
(loop with current = (point)
with point
with prefix-def
with sources
for source in (ac-compiled-sources)
for prefix = (assoc-default 'prefix source)
for req = (or (assoc-default 'requires source) requires 1)
if (null prefix-def)
do
(unless (member prefix ignore-list)
(save-excursion
(setq point (cond
((symbolp prefix)
(funcall prefix))
((stringp prefix)
(and (re-search-backward (concat prefix "\\=") nil t)
(or (match-beginning 1) (match-beginning 0))))
((stringp (car-safe prefix))
(let ((regexp (nth 0 prefix))
(end (nth 1 prefix))
(group (nth 2 prefix)))
(and (re-search-backward (concat regexp "\\=") nil t)
(funcall (if end 'match-end 'match-beginning)
(or group 0)))))
(t
(eval prefix))))
(if (and point
(integerp req)
(< (- current point) req))
(setq point nil))
(if point
(setq prefix-def prefix))))
if (equal prefix prefix-def) do (push source sources)
finally return
(and point (list prefix-def point (nreverse sources)))))
(defun ac-init ()
"Initialize current sources to start completion."
(setq ac-candidates-cache nil)
(loop for source in ac-current-sources
for function = (assoc-default 'init source)
if function do
(save-excursion
(cond
((functionp function)
(funcall function))
(t
(eval function))))))
(defun ac-candidates-1 (source)
(let* ((do-cache (assq 'cache source))
(function (assoc-default 'candidates source))
(action (assoc-default 'action source))
(document (assoc-default 'document source))
(symbol (assoc-default 'symbol source))
(ac-limit (or (assoc-default 'limit source) ac-limit))
(face (or (assoc-default 'face source) (assoc-default 'candidate-face source)))
(selection-face (assoc-default 'selection-face source))
(cache (and do-cache (assq source ac-candidates-cache)))
(candidates (cdr cache)))
(unless cache
(setq candidates (save-excursion
(cond
((functionp function)
(funcall function))
(t
(eval function)))))
;; Convert (name value) format candidates into name with text properties.
(setq candidates (mapcar (lambda (candidate)
(if (consp candidate)
(propertize (car candidate) 'value (cdr candidate))
candidate))
candidates))
(when do-cache
(push (cons source candidates) ac-candidates-cache)))
(setq candidates (funcall (or (assoc-default 'match source)
ac-match-function)
ac-prefix candidates))
;; Remove extra items regarding to ac-limit
(if (and (integerp ac-limit) (> ac-limit 1) (> (length candidates) ac-limit))
(setcdr (nthcdr (1- ac-limit) candidates) nil))
;; Put candidate properties
(setq candidates (mapcar (lambda (candidate)
(popup-item-propertize candidate
'action action
'symbol symbol
'document document
'popup-face face
'selection-face selection-face))
candidates))
candidates))
(defun ac-candidates ()
"Produce candidates for current sources."
(loop with completion-ignore-case = (or (eq ac-ignore-case t)
(and (eq ac-ignore-case 'smart)
(let ((case-fold-search nil)) (not (string-match "[[:upper:]]" ac-prefix)))))
with case-fold-search = completion-ignore-case
with prefix-len = (length ac-prefix)
for source in ac-current-sources
append (ac-candidates-1 source) into candidates
finally return
(progn