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auto-complete.el
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auto-complete.el
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;;; auto-complete.el --- Inline auto completion
;; Copyright (C) 2008, 2009 MATSUYAMA Tomohiro
;; Author: MATSUYAMA Tomohiro <[email protected]>
;; Keywords: convenience
;; Version: 0.2.0
;; 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.
;; Enjoy!
;;; Qualification:
;;
;; This extension can work property on GNU Emacs 22 or higher.
;;; Installation:
;;
;; To use this extension, locate all .el files of this package to your load-path directory.
;;
;; $ cp auto-complete-x.x.x/*.el ~/.emacs.d/
;;
;; And write following code into your .emacs.
;;
;; (require 'auto-complete)
;; (global-auto-complete-mode t)
;;; Tips:
;;
;; Use C-n/C-p to select candidates
;; --------------------------------
;;
;; Add following code to your .emacs.
;;
;; (define-key ac-complete-mode-map "\C-n" 'ac-next)
;; (define-key ac-complete-mode-map "\C-p" 'ac-previous)
;;
;;
;; Don't start completion automatically
;; ------------------------------------
;;
;; Add following code to your .emacs.
;;
;; (setq ac-auto-start nil)
;; (global-set-key "\M-/" 'ac-start)
;;
;; or
;;
;; ;; start completion when entered 3 characters
;; (setq ac-auto-start 3)
;;
;;
;; Stop completion
;; ---------------
;;
;; Add following code to your .emacs.
;;
;; (define-key ac-complete-mode-map "\M-/" 'ac-stop)
;;
;; Now you can stop completion by pressing M-/.
;;
;;
;; Completion by TAB
;; -----------------
;;
;; Add following code to your .emacs.
;;
;; (define-key ac-complete-mode-map "\t" 'ac-complete)
;; (define-key ac-complete-mode-map "\r" nil)
;;
;;
;; Do What I Mean mode
;; -------------------
;;
;; If DWIM (Do What I Mean) mode is enabled,
;; the following features is available:
;;
;; a. TAB (ac-expand) behave as completion (ac-complete)
;; when only one candidate is left
;; b. TAB (ac-expand) behave as completion (ac-complete)
;; after you select candidate
;; c. Disapear automatically when you
;; complete a candidate.
;;
;; DWIM mode is enabled by default.
;; You can enable this feature by
;; setting `ac-dwim' to t.
;;
;; (setq ac-dwim t)
;;
;;
;; Change default sources
;; ----------------------
;;
;; (setq-default ac-sources '(ac-source-abbrev ac-source-words-in-buffer))
;;
;;
;; Change sources for particular mode
;; ----------------------------------
;;
;; (add-hook 'emacs-lisp-mode-hook
;; (lambda ()
;; (setq ac-sources '(ac-source-words-in-buffer ac-source-symbols))))
;;; History:
;;
;; 2008-03-18
;; * auto-complete.el 0.2.0 released
;;
;; 2008-03-04
;; * fixed menu position bug
;;
;; 2008-03-02
;; * made a source be able to be just a function which returns candidates
;; * added ac-source-words-in-all-buffer
;;
;; 2008-03-01
;; * added basic cache facility
;;
;; 2008-02-20
;; * fixed menu position bug at long line (thanks rubikitch <[email protected]>)
;; * made dictionary source generator (ac-define-dictionary-source)
;; * devided into some files (auto-complete-ruby.el, auto-complete-yasnippet.el, etc)
;;
;; 2008-02-19
;; * added ac-trigger-commands switch
;;
;; 2008-02-10
;; * added ac-stop function (suggestion from Andy Stewart)
;; * added ac-override-local-map switch (suggestion from Andy Stewart)
;;
;; 2008-02-03
;; * omni completion redesign
;; * ac-sources is now buffer local for every buffer
;; * fixed a menu position bug (thanks Andy Stewart)
;; * fixed byte-compile warnings (thanks Andy Stewart)
;;
;; 2008-01-22
;; * added face/selection-face property for sources
;; * supported menu scroll
;;
;; 2008-01-20
;; * omni completion
;;
;; 2008-12-24
;; * suppress errors on command hook
;;
;; 2008-12-03
;; * changed ac-dwim to nil by default
;; * made menu to be able to adjust width
;;
;; 2008-12-03
;; * renamed ac-find-function to ac-prefix-function
;; * renamed ac-target to ac-prefix
;;
;; 2008-11-26
;; * auto-complete.el 0.1.0 released
;;
;; 2008-11-19
;; * thanks for Taiki SUGAWARA <[email protected]>
;; * added source ac-source-abbrev
;; * added source ac-source-symbols
;; * added ac-expand-common to expand common part
;;
;; 2008-11-18
;; * added ac-auto-start switch
;; * added ac-dwim switch
;; * changed menu popup behavior at end of window
;; * thanks rubikitch <[email protected]>, kazu-yamamoto.
;; * fixed canceler bug
;; * changed to use overriding-local-map instead of minor mode map
;; * changed default key bindings
;;
;; 2008-11-16
;; * supported candidates by using sources
;; * added automatically start swtich
;; * fixed some bug
;; * added source ac-source-files-in-current-dir
;; * added source ac-source-words-in-buffer
;; * added source ac-source-yasnippet
;; * renamed ac-enum-candidates-function to ac-candidate-function
;; * renamed ac-find-target-function to ac-find-function
;; * ac-find-function and ac-candidate-function is not buffer local variable now
;; * made candidates visible when you are end of line
;;
;; 2008-11-11
;; * by reporting from rubikitch <[email protected]>
;; * renamed hook name
;; * registered backward-delete-char as special command
;; * fixed code for creating candidates
;; * made auto-complete disabled when isearch-mode enabled
;; * added some major-mode into ac-modes
;;
;; 2008-11-09
;; * auto-complete.el 0.0.1 released
;; * fixed double-width character displaying problem
;; * fixed menu position following tab character
;; * made candidates visible when you are end of window
;;; TODO:
;;
;; - test facility
;; - support composed chars
;; - fuzzy match
;; - minibuffer completion
;; - dictionary
;; - documentation
;; - performance issue (cache issue)
;; - fix narrowing bug (reported by Yuto Hayamizu <[email protected]>)
;; - care about undo (buffer-disable-undo)
;; - scroll bar (visual)
;; - show description
;; - semantic
;; - use cl
;; - icon
;; - refactoring (especially menu)
;; - linum.el bug (reported by Andy Stewart)
;; - flymake bug (reported by TiagoCamargo)
;;; Code:
(defgroup auto-complete nil
"Auto completion with popup menu"
:group 'convenience
:prefix "auto-complete-")
(defcustom ac-candidate-menu-height 10
"Max height of candidate menu."
:type 'number
:group 'auto-complete)
(defcustom ac-candidate-max 10
"Max of number of candidates."
:type 'number
:group 'auto-complete)
(defcustom ac-modes
'(emacs-lisp-mode lisp-interaction-mode
c-mode cc-mode c++-mode java-mode
perl-mode cperl-mode python-mode ruby-mode
ecmascript-mode javascript-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 '(list symbol)
:group 'auto-complete)
(defcustom ac-trigger-commands
'(self-insert-command)
"Trigger commands that specify whether `auto-complete' should start or not."
:type '(list symbol)
:group 'auto-complete)
(defcustom ac-auto-start t
"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."
:group 'auto-complete)
(defcustom ac-dwim nil
"Non-nil means `auto-complete' works based on Do What I Mean."
:type 'boolean
:group 'auto-complete)
(defcustom ac-override-local-map nil
"Non-nil mean use `ac-complete-mode-map' override local map.
Please set it to non-nil only if you faced to some problem about
minor-mode keymap conflicts."
:type 'boolean
:group 'auto-complete)
(defface ac-candidate-face
'((t (:background "lightgray" :foreground "black")))
"Face for candidate."
:group 'auto-complete)
(defface ac-selection-face
'((t (:background "blue" :foreground "white")))
"Face for the selected candidate."
:group 'auto-complete)
(defvar auto-complete-mode-hook nil
"Hook for `auto-complete-mode'.")
(defvar ac-menu nil
"Menu instance.")
(defvar ac-menu-direction 1
"Positive integer means `ac-menu' grows forward.
Or, `ac-menu' grows backward.")
(defvar ac-menu-offset 0
"Offset to contents.")
(defvar ac-menu-scroll 0
"Scroll top of `ac-menu'.")
(defvar ac-completing nil
"Non-nil means `auto-complete-mode' is now working on completion.")
(defvar ac-saved-window-start nil
"Saved window start value for restore.")
(defvar ac-saved-window-hscroll nil
"Saved window hscroll value for restore.")
(defvar ac-buffer nil
"A buffer where auto-complete is started.")
(defvar ac-point nil
"Start point of prefix.")
(defvar ac-old-point nil
"Previous start point of prefix.")
(defvar ac-prefix nil
"Prefix.")
(defvaralias 'ac-target 'ac-prefix)
(defvar ac-limit 0
"Limit of number of candidates.")
(defvar ac-candidates nil
"Current candidates.")
(defvar ac-selection nil
"Current candidate index.")
(defvar ac-dwim-enable nil
"Non-nil means DWIM completion will be allowed.")
(defvar ac-setup-function 'ac-sources-setup
"This function will be called when `auto-complete-mode' is enabled.")
(defvar ac-prefix-function 'ac-sources-prefix
"When `auto-complete-mode' finds it can start completion
or update candidates, it will call this function to find a
start point of the prefix.
If this function returns a point `auto-complete-mode'
will set the substring between the point and current point to `ac-prefix'.
And also it will start completion or update candidates by using
the `ac-prefix'.
If this function returns `nil', `auto-complete-mode'
ignore starting completion or stop completing.")
(defvaralias 'ac-find-function 'ac-prefix-function)
(defvar ac-init-function 'ac-sources-init
"This function will be called when candidate menu is setupped.")
(defvar ac-cleanup-function 'ac-sources-cleanup
"This function will be called when candidate menu is cleanupped")
(defvar ac-candidate-function 'ac-sources-candidate
"This function can return candidates as list by
using the `TARGET' that is given as a first argument.")
(defvar ac-complete-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "\t" 'ac-expand)
(define-key map "\r" 'ac-complete)
(define-key map [down] 'ac-next)
(define-key map [up] 'ac-previous)
map)
"Keymap for completion.")
(defvar ac-saved-local-map nil
"Old keymap before `auto-complete' activated.")
;;;; Auto completion
(defun ac-setup-menu (point width)
"Setup popup menu."
(when ac-menu
;; reposition
(ac-menu-delete ac-menu)
(setq ac-menu nil))
(save-excursion
(goto-char point)
(let ((column (ac-current-physical-column))
(line (line-number-at-pos)))
(setq ac-saved-window-start (window-start))
(setq ac-saved-window-hscroll (window-hscroll))
(setq ac-menu-direction
(if (and (> line ac-candidate-menu-height)
(> ac-candidate-menu-height
(-
(max 1 (- (window-height)
(if mode-line-format 1 0)
(if header-line-format 1 0)))
(count-lines (window-start) (point)))))
-1
1))
(let ((window-width (window-width))
(right (- (+ column width)
(window-hscroll))))
(if (and (> right window-width)
(>= right width)
(>= column width))
(setq column (- column width))))
(if (> ac-menu-direction 0)
(progn
(forward-line)
(if (eq line (line-number-at-pos))
(newline)
(forward-line -1))
(setq ac-menu (ac-menu-create (1+ line) column width ac-candidate-menu-height))
(setq ac-point point))
(setq ac-menu (ac-menu-create (- line ac-candidate-menu-height) column width ac-candidate-menu-height))
(setq ac-point point)))))
(defun ac-cleanup ()
"Destroy popup menu."
(ac-deactivate-mode-map)
(when ac-menu
(ac-menu-delete ac-menu)
(set-window-start (selected-window) ac-saved-window-start)
(set-window-hscroll (selected-window) ac-saved-window-hscroll))
(setq ac-menu nil)
(setq ac-menu-scroll 0)
(setq ac-completing nil)
(setq ac-point nil)
(setq ac-candidates nil)
(setq ac-selection 0)
(setq ac-selection-scroll-top 0)
(funcall ac-cleanup-function))
(defun ac-activate-mode-map ()
"Activate `ac-complete-mode-map'."
(if ac-override-local-map
(progn
(setq ac-saved-local-map overriding-terminal-local-map)
(if (eq ac-saved-local-map ac-complete-mode-map)
;; maybe never reach here
(setq ac-saved-local-map nil))
(setq overriding-terminal-local-map ac-complete-mode-map))
;; rearrange ac-mode-map pair first
(assq-delete-all 'ac-completing minor-mode-map-alist)
(push (cons 'ac-completing ac-complete-mode-map) minor-mode-map-alist)))
(defun ac-deactivate-mode-map ()
"Deactivate `ac-complete-mode-map'."
(when (and ac-override-local-map
(eq overriding-terminal-local-map ac-complete-mode-map))
(setq overriding-terminal-local-map ac-saved-local-map)
(setq ac-saved-local-map nil)))
(defun ac-next ()
"Select next candidate."
(interactive)
(if (interactive-p)
(setq ac-dwim-enable t))
(if ac-candidates
(ac-select-candidate
(let ((selection (1+ ac-selection)))
(if (= selection (+ ac-menu-offset (min ac-candidate-menu-height (length ac-candidates))))
(if (< (+ (- ac-selection ac-menu-offset) ac-menu-scroll) (1- (length ac-candidates)))
(prog1 ac-selection
(setq ac-menu-scroll (1+ ac-menu-scroll))
(ac-redraw-candidates))
(setq ac-menu-scroll 0)
(ac-redraw-candidates)
ac-menu-offset)
selection)))))
(defun ac-previous ()
"Select previous candidate."
(interactive)
(if (interactive-p)
(setq ac-dwim-enable t))
(if ac-candidates
(ac-select-candidate
(let ((selection (1- ac-selection)))
(if (< selection ac-menu-offset)
(if (= ac-menu-scroll 0)
(prog1 (1- (+ ac-menu-offset (min ac-candidate-menu-height (length ac-candidates))))
(setq ac-menu-scroll (- (length ac-candidates) (min ac-candidate-menu-height (length ac-candidates))))
(ac-redraw-candidates))
(setq ac-menu-scroll (1- ac-menu-scroll))
(ac-redraw-candidates)
ac-selection)
selection)))))
(defun ac-expand-1 ()
"Try expansion."
(let ((string (overlay-get (ac-menu-line-overlay ac-menu ac-selection) 'real-string)))
(delete-region ac-point (point))
(insert string)
(setq ac-prefix string)))
(defun ac-expand ()
"Try expansion but select next if expanded twice."
(interactive)
(if (and ac-dwim ac-dwim-enable)
(ac-complete)
(let ((target ac-prefix)
(string (ac-expand-1)))
(when (equal target string)
(ac-next)
(ac-expand-1)))))
(defun ac-expand-common ()
"Try expansion common part."
(interactive)
(let ((common (try-completion ac-prefix ac-candidates))
(buffer-undo-list t))
(when (stringp common)
(delete-region ac-point (point))
(insert common)
(setq ac-prefix common))))
(defun ac-complete ()
"Try completion."
(interactive)
(let* ((candidate (ac-get-selected-candidate))
(action (ac-get-candidate-action candidate)))
(ac-expand-1)
(if action
(funcall action))
(ac-abort)))
(defun ac-abort ()
"Abort completion."
(ac-cleanup))
(defun ac-stop ()
"Stop completiong."
(interactive)
(ac-abort))
(defun ac-redraw-candidates ()
"Redraw the menu contents."
(let ((i ac-menu-offset))
;; show line and set string to the line
(mapc
(lambda (candidate)
(when (< i ac-candidate-menu-height)
(ac-menu-show-line ac-menu i)
(ac-menu-set-line-string ac-menu i candidate
(if (= i ac-selection)
(or (ac-get-candidate-property 'selection-face candidate) 'ac-selection-face)
(or (ac-get-candidate-property 'candidate-face candidate) 'ac-candidate-face)))
(setq i (1+ i))))
(nthcdr ac-menu-scroll ac-candidates))
;; ensure lines visible
(if (and (> ac-menu-direction 0)
(> i (-
(max 1 (- (window-height)
(if mode-line-format 1 0)
(if header-line-format 1 0)))
(count-lines (window-start) (point)))))
(recenter (- (1+ i))))
(if (> i ac-menu-offset)
(let ((window-width (window-width))
(right (- (+ (ac-menu-column ac-menu) (ac-menu-width ac-menu))
(window-hscroll))))
(if (> right window-width)
(scroll-left (- right window-width)))))
;; hide remaining lines
(if (> ac-menu-direction 0)
(while (< i ac-candidate-menu-height)
(ac-menu-hide-line ac-menu i)
(setq i (1+ i)))
(dotimes (i ac-menu-offset)
(ac-menu-hide-line ac-menu i)))))
(defun ac-update-candidates (candidates)
"Update candidates of popup menu."
(setq ac-menu-offset (if (> ac-menu-direction 0)
0
(- ac-candidate-menu-height
(min ac-candidate-menu-height
(length candidates)))))
(setq ac-selection ac-menu-offset)
(setq ac-candidates candidates)
(setq ac-dwim-enable (= (length candidates) 1))
(if candidates
(progn
(setq ac-completing t)
(ac-activate-mode-map))
(setq ac-completing nil)
(ac-deactivate-mode-map))
(ac-redraw-candidates))
(defun ac-get-selected-candidate ()
(overlay-get (ac-menu-line-overlay ac-menu ac-selection) 'real-string))
(defun ac-get-candidate-action (candidate)
(ac-get-candidate-property 'action candidate))
(defun ac-propertize-candidate (candidate &rest properties)
(apply 'propertize candidate properties))
(defun ac-get-candidate-property (prop candidate)
(get-text-property 0 prop candidate))
(defun ac-select-candidate (selection)
"Select candidate pointed by `SELECTION'."
(when ac-candidates
(let ((c1 (nth (+ (- ac-selection ac-menu-offset) ac-menu-scroll) ac-candidates))
(c2 (nth (+ (- selection ac-menu-offset) ac-menu-scroll) ac-candidates)))
(ac-menu-set-line-string ac-menu ac-selection c1
(or (ac-get-candidate-property 'candidate-face c1)
'ac-candidate-face))
(ac-menu-set-line-string ac-menu selection c2
(or (ac-get-candidate-property 'selection-face c2)
'ac-selection-face))
(setq ac-selection selection))))
(defun ac-start ()
"Start completion."
(interactive)
(let* ((point (save-excursion (funcall ac-prefix-function)))
(reposition (not (equal ac-point point))))
(if (null point)
(ac-abort)
(setq ac-buffer (current-buffer))
(setq ac-point point)
(when (not (equal ac-point ac-old-point))
(setq ac-old-point point))
(setq ac-prefix (buffer-substring-no-properties point (point)))
(setq ac-limit ac-candidate-max)
(if (or reposition (null ac-menu))
(save-excursion
(funcall ac-init-function)))
(let* ((candidates
(if (or ac-completing
(not (integerp ac-auto-start))
(>= (length ac-prefix) ac-auto-start))
(save-excursion
(funcall ac-candidate-function))))
(current-width (if ac-menu (ac-menu-width ac-menu) 0))
(width (let ((w '(0)) s)
(dotimes (i ac-candidate-menu-height)
(setq s (nth i candidates))
(if (stringp s) (push (string-width s) w)))
(apply 'max w))))
(if (or reposition
(null ac-menu)
(> width current-width)
(< width (- current-width 10)))
(ac-setup-menu point (* (ceiling (/ width 10.0)) 10)))
(if (and ac-dwim
(= (length candidates) 1)
(equal (car candidates) ac-prefix)
(null (ac-get-candidate-action (car candidates))))
(setq candidates nil))
(ac-update-candidates candidates)))))
(defun ac-trigger-command-p ()
"Return non-nil if `this-command' is a trigger command."
(or (memq this-command ac-trigger-commands)
(and ac-completing
(memq this-command
'(delete-backward-char
backward-delete-char
backward-delete-char-untabify)))))
(defun ac-current-physical-column ()
"Current physical column. (not logical column)"
(- (point) (save-excursion (vertical-motion 0) (point))))
(defun ac-on-pre-command ()
(progn ; ignore-errors
(if (and (not (ac-trigger-command-p))
(or (not (symbolp this-command))
(not (string-match "^ac-" (symbol-name this-command)))))
(ac-abort))))
(defun ac-on-post-command ()
(progn ; ignore-errors
(if (and (or ac-auto-start
ac-completing)
(not isearch-mode)
(ac-trigger-command-p))
(ac-start))))
(defun auto-complete-mode-maybe ()
"What buffer `auto-complete-mode' prefers."
(if (and (not (minibufferp (current-buffer)))
(memq major-mode ac-modes))
(auto-complete-mode 1)))
(require 'easy-mmode)
(define-minor-mode auto-complete-mode
"AutoComplete mode"
:lighter " AC"
:group 'auto-complete
(if auto-complete-mode
(progn
(funcall ac-setup-function)
(add-hook 'post-command-hook 'ac-on-post-command nil t)
(add-hook 'pre-command-hook 'ac-on-pre-command nil t)
(run-hooks 'auto-complete-mode-hook))
(remove-hook 'post-command-hook 'ac-on-post-command t)
(remove-hook 'pre-command-hook 'ac-on-pre-command t)
(ac-abort)))
(define-global-minor-mode global-auto-complete-mode
auto-complete-mode auto-complete-mode-maybe
:group 'auto-complete)
;;;; Basic cache facility
(defvar ac-clear-variables-after-save nil)
(defun ac-clear-variable-after-save (variable)
(push variable ac-clear-variables-after-save))
(defun ac-clear-variables-after-save ()
(dolist (variable ac-clear-variables-after-save)
(set variable nil)))
;;;; Sources implementation
(defvar ac-sources '(ac-source-words-in-buffer)
"Sources for completion.
Source takes a form of just function which returns candidates or alist:
init INIT-FUNC
INIT-FUNC will be called before creating candidate every time.
candidates CANDIDATE-FUNC
CANDIDATE-FUNC will return a list of string as candidates.
CANDIDATE-FUNC should care about `ac-limit' that is specified at limit for performance.
action ACTION-FUNC
ACTION-FUNC will be called when `ac-complete' is called.
limit LIMIT-NUM
A limit of candidates.
requires REQUIRES-NUM
This source will be included when `ac-prefix' length is larger than REQUIRES-NUM.")
(make-variable-buffer-local 'ac-sources)
(defvar ac-sources-prefix-function 'ac-sources-prefix-default
"Default prefix function for sources.
You should override this variable instead of ac-prefix-function.")
(defvar ac-current-sources nil
"Current working sources.")
(defvar ac-omni-completion-sources nil
"An alist of REGEXP and SOURCES.
If matched regexp, switch to omni-completion mode and
use SOURCES as `ac-sources'.")
(make-variable-buffer-local 'ac-omni-completion-sources)
(defvar ac-sources-omni-completion nil
"Non-nil means `auto-complete-mode' is now working on omni-completion.")
(defun ac-sources-setup ()
"Implementation for `ac-setup-function' by sources."
(make-local-variable 'ac-clear-variables-after-save)
(add-hook 'after-save-hook 'ac-clear-variables-after-save nil t))
(defun ac-sources-init ()
"Implementation for `ac-init-function' by sources."
(or ac-current-sources (setq ac-current-sources ac-sources))
(dolist (source ac-current-sources)
(let ((init-function (ac-get-source-property 'init source)))
(if init-function
(funcall init-function)))))
(defun ac-sources-cleanup ()
"Implementation for `ac-cleanup-function' by sources."
(setq ac-current-sources nil)
(setq ac-sources-omni-completion nil))
(defun ac-sources-prefix ()
"Implemention for `ac-prefix-function' by sources."
(let (point)
(dolist (pair ac-omni-completion-sources)
(when (looking-back (car pair))
(setq ac-current-sources (cdr pair))
(setq ac-sources-omni-completion t)
(setq ac-completing t)
(setq point (match-end 0))))
(or point
(if (and ac-completing ac-sources-omni-completion)
ac-point
(setq ac-current-sources ac-sources)
(setq ac-sources-omni-completion nil)
(funcall ac-sources-prefix-function)))))
(defun ac-sources-prefix-default ()
"Default implementation for `ac-sources-prefix-function'."
(require 'thingatpt)
(car-safe (bounds-of-thing-at-point 'symbol)))
(defun ac-sources-candidate ()
"Implementation for `ac-cadidates-function' by sources."
(let (candidates)
(dolist (source ac-current-sources)
(let* ((ac-limit (or (ac-get-source-property 'limit source) ac-limit))
(requires (ac-get-source-property 'requires source))
cand)
(when (or ac-sources-omni-completion
(>= (length ac-prefix)
(if (integerp requires)
requires
1)))
(setq cand
(delq nil
(mapcar (lambda (candidate)
(ac-propertize-candidate candidate
'action (ac-get-source-property 'action source)
'face (ac-get-source-property 'candidate-face source)
'candidate-face (ac-get-source-property 'candidate-face source)
'selection-face (ac-get-source-property 'selection-face source)))
(funcall (ac-get-source-property 'candidates source))))))
(if (and (> ac-limit 1)
(> (length cand) ac-limit))
(setcdr (nthcdr (1- ac-limit) (copy-sequence cand)) nil))
(setq candidates (append candidates cand))))
(delete-dups candidates)))
(defun ac-get-source-property (property source)
(if (symbolp source)
(setq source (symbol-value source)))
(if (and (functionp source)
(eq property 'candidates))
source
(if (consp source)
(assoc-default property source))))
;;;; Standard sources
(defun ac-candidate-words-in-buffer ()
"Default implemention for `ac-candidate-function'."
(if (> (length ac-prefix) 0)
(let ((i 0)
candidate
candidates
(regexp (concat "\\b" (regexp-quote ac-prefix) "\\(\\s_\\|\\sw\\)*\\b")))
(save-excursion
;; search backward
(goto-char ac-point)
(while (and (< i ac-limit)
(re-search-backward regexp nil t))
(setq candidate (match-string-no-properties 0))
(unless (member candidate candidates)
(push candidate candidates)
(setq i (1+ i))))
;; search backward
(goto-char (+ ac-point (length ac-prefix)))
(while (and (< i ac-limit)
(re-search-forward regexp nil t))
(setq candidate (match-string-no-properties 0))
(unless (member candidate candidates)
(push candidate candidates)
(setq i (1+ i))))
(nreverse candidates)))))
(defvar ac-source-words-in-buffer
'((candidates . ac-candidate-words-in-buffer))
"Source for completing words in current buffer.")
(defvar ac-word-index nil
"Word index for individual buffer.")
(ac-clear-variable-after-save 'ac-word-index)
(defvar ac-source-words-in-all-buffer
'((init
. (lambda ()
(dolist (buffer (buffer-list))
(with-current-buffer buffer
(if (not (local-variable-p 'ac-word-index))
(make-local-variable 'ac-word-index))
(if (eq buffer ac-buffer)
(setq ac-word-index (ac-candidate-words-in-buffer))
(if (and (null ac-word-index)
(< (buffer-size) 102400))
(save-excursion
(goto-char (point-min))
(while (re-search-forward "\\b\\(\\s_\\|\\sw\\)+\\b" nil t)
(let ((candidate (match-string-no-properties 0)))
(if (not (member candidate ac-word-index))
(push candidate ac-word-index))))
(setq ac-word-index (nreverse ac-word-index)))))))))
(candidates
. (lambda ()
(let ((candidates)
(buffers (buffer-list)))
(while (and (< (length candidates) ac-limit)
buffers)
(setq candidates (append candidates (all-completions ac-prefix (buffer-local-value 'ac-word-index (car buffers)))))
(setq buffers (cdr buffers)))
candidates))))
"Source for completing words in all buffer.")
(defvar ac-source-symbols
'((candidates
. (lambda ()
(all-completions ac-prefix obarray))))
"Source for Emacs lisp symbols.")
(defvar ac-source-abbrev
`((candidates
. (lambda ()
(all-completions ac-prefix local-abbrev-table)))
(action
. expand-abbrev))
"Source for abbrev.")
(defvar ac-source-files-in-current-dir
'((candidates
. (lambda ()
(all-completions ac-prefix (directory-files default-directory)))))
"Source for listing files in current directory.")
(defun ac-filename-candidate ()
(let ((dir (file-name-directory ac-prefix)))
(ignore-errors
(delq nil
(mapcar (lambda (file)
(if (not (member file '("./" "../")))
(concat dir file)))
(file-name-all-completions
(file-name-nondirectory ac-prefix) dir))))))
(defvar ac-source-filename
'((candidates . ac-filename-candidate))
"Source for completing file name.")
(defvar ac-imenu-index nil
"Imenu index.")
(defun ac-imenu-candidate ()
(require 'imenu)
(let ((i 0)
(stack ac-imenu-index)
candidates
node)
(while (and stack
(< i ac-limit))
(setq node (pop stack))
(when (consp node)
(let ((car (car node))
(cdr (cdr node)))
(if (consp cdr)
(mapc (lambda (child)
(push child stack))
cdr)
(when (and (stringp car)
(string-match (concat "^" (regexp-quote ac-prefix)) car))
(push car candidates)
(setq i (1+ i)))))))
(nreverse candidates)))
(defvar ac-source-imenu
'((init
. (lambda ()
(require 'imenu)
(setq ac-imenu-index
(ignore-errors (imenu--make-index-alist)))))
(candidates . ac-imenu-candidate))
"Source for imenu.")