You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
388 lines
16 KiB
388 lines
16 KiB
;;; helm-dabbrev.el --- Helm implementation of dabbrev. -*- lexical-binding: t -*-
|
|
|
|
;; Copyright (C) 2012 ~ 2019 Thierry Volpiatto <thierry.volpiatto@gmail.com>
|
|
|
|
;; 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/>.
|
|
|
|
;;; Code:
|
|
|
|
(require 'helm)
|
|
(require 'helm-lib)
|
|
(require 'helm-help)
|
|
(require 'helm-elisp) ; For show-completion.
|
|
|
|
(defgroup helm-dabbrev nil
|
|
"Dabbrev related Applications and libraries for Helm."
|
|
:group 'helm)
|
|
|
|
(defcustom helm-dabbrev-always-search-all t
|
|
"Always search in all buffers when non--nil.
|
|
Note that even if nil, a search in all buffers
|
|
will occur if the length of candidates is <= than
|
|
`helm-dabbrev-max-length-result'."
|
|
:group 'helm-dabbrev
|
|
:type 'boolean)
|
|
|
|
(defcustom helm-dabbrev-candidates-number-limit 1000
|
|
"Maximum number of candidates to collect.
|
|
|
|
Higher this number is, slower the computation of candidates will be.
|
|
You can use safely a higher value with emacs-26+.
|
|
Note that this have nothing to do with `helm-candidate-number-limit'."
|
|
:group 'helm-dabbrev
|
|
:type 'integer)
|
|
|
|
(defcustom helm-dabbrev-ignored-buffers-regexps
|
|
'("\\*helm" "\\*Messages" "\\*Echo Area" "\\*Buffer List")
|
|
"List of regexps matching names of buffers that helm-dabbrev should not check."
|
|
:group 'helm-dabbrev
|
|
:type '(repeat regexp))
|
|
|
|
(defcustom helm-dabbrev-related-buffer-fn #'helm-dabbrev--same-major-mode-p
|
|
"A function that decide if a buffer to search in is related to `current-buffer'.
|
|
This is actually determined by comparing `major-mode' of the buffer to search
|
|
and the `current-buffer'.
|
|
The function take one arg, the buffer which is current, look at
|
|
`helm-dabbrev--same-major-mode-p' for example.
|
|
|
|
When nil all buffers are considered related to `current-buffer'."
|
|
:group 'helm-dabbrev
|
|
:type 'function)
|
|
|
|
(defcustom helm-dabbrev-major-mode-assoc nil
|
|
"Major mode association alist.
|
|
This allow helm-dabbrev searching in buffers with the associated `major-mode'.
|
|
e.g \(emacs-lisp-mode . lisp-interaction-mode\)
|
|
will allow searching in the lisp-interaction-mode buffer when `current-buffer'
|
|
is an `emacs-lisp-mode' buffer and vice versa i.e
|
|
no need to provide \(lisp-interaction-mode . emacs-lisp-mode\) association.
|
|
|
|
When nil check is the searched buffer have same `major-mode'
|
|
than the `current-buffer'.
|
|
This have no effect when `helm-dabbrev-related-buffer-fn' is nil or of course
|
|
bound to a function that doesn't handle this var."
|
|
:type '(alist :key-type symbol :value-type symbol)
|
|
:group 'helm-dabbrev)
|
|
|
|
(defcustom helm-dabbrev-lineno-around 30
|
|
"Search first in this number of lines before an after point."
|
|
:group 'helm-dabbrev
|
|
:type 'integer)
|
|
|
|
(defcustom helm-dabbrev-cycle-threshold 5
|
|
"Number of time helm-dabbrev cycle before displaying helm completion.
|
|
When nil or 0 disable cycling."
|
|
:group 'helm-dabbrev
|
|
:type '(choice (const :tag "Cycling disabled" nil) integer))
|
|
|
|
(defcustom helm-dabbrev-case-fold-search 'smart
|
|
"Set `case-fold-search' in `helm-dabbrev'.
|
|
Same as `helm-case-fold-search' but for `helm-dabbrev'.
|
|
Note that this is not affecting searching in helm buffer,
|
|
but the initial search for all candidates in buffer(s)."
|
|
:group 'helm-dabbrev
|
|
:type '(choice (const :tag "Ignore case" t)
|
|
(const :tag "Respect case" nil)
|
|
(other :tag "Smart" 'smart)))
|
|
|
|
(defcustom helm-dabbrev-use-thread nil
|
|
"[EXPERIMENTAL] Compute candidates asynchronously (partially) when non nil.
|
|
|
|
The idea is to compute candidates while cycling the first ones, so
|
|
this is available only if `helm-dabbrev-cycle-threshold' is not 0 or
|
|
nil, also it is available only on emacs-26+ (needs threads).
|
|
|
|
This is reasonably working when you don't have to complete a huge list
|
|
of candidates, otherwise you will have a small delay after the first cycle
|
|
because thread is released unexpectedly when helm-dabbrev exit after
|
|
first insertion.
|
|
|
|
IOW keep `helm-dabbrev-candidates-number-limit' to a reasonable
|
|
value (I don't!) and give enough prefix before completing e.g. for
|
|
completing \"helm-dabbrev\" use \"helm-d\" and not \"he\" if you want
|
|
to use this."
|
|
:group 'helm-dabbrev
|
|
:type 'boolean)
|
|
|
|
(defvaralias 'helm-dabbrev--regexp 'helm-dabbrev-separator-regexp)
|
|
(make-obsolete-variable 'helm-dabbrev--regexp
|
|
'helm-dabbrev-separator-regexp "2.8.3")
|
|
;; Check for beginning of line should happen last (^\n\\|^).
|
|
(defvar helm-dabbrev-separator-regexp
|
|
"\\s-\\|\t\\|[(\\[\\{\"'`=<$;,@.#+]\\|\\s\\\\|^\n\\|^"
|
|
"Regexp matching the start of a dabbrev candidate.")
|
|
|
|
|
|
(defvar helm-dabbrev-map
|
|
(let ((map (make-sparse-keymap)))
|
|
(set-keymap-parent map helm-map)
|
|
(define-key map (kbd "M-/") 'helm-next-line)
|
|
(define-key map (kbd "M-:") 'helm-previous-line)
|
|
map))
|
|
|
|
;; Internal
|
|
(defvar helm-dabbrev--cache nil)
|
|
(defvar helm-dabbrev--data nil)
|
|
(cl-defstruct helm-dabbrev-info dabbrev limits iterator)
|
|
(defvar helm-dabbrev--already-tried nil)
|
|
(defvar helm-dabbrev--current-thread nil)
|
|
|
|
|
|
(defun helm-dabbrev--buffer-list ()
|
|
(cl-loop for buf in (buffer-list)
|
|
unless (cl-loop for r in helm-dabbrev-ignored-buffers-regexps
|
|
thereis (string-match r (buffer-name buf)))
|
|
collect buf))
|
|
|
|
(defun helm-dabbrev--same-major-mode-p (start-buffer)
|
|
"Decide if current-buffer is related to START-BUFFER."
|
|
(helm-same-major-mode-p start-buffer helm-dabbrev-major-mode-assoc))
|
|
|
|
(defun helm-dabbrev--collect (str limit ignore-case all)
|
|
(let* ((case-fold-search ignore-case)
|
|
(buffer1 (current-buffer)) ; start buffer.
|
|
(minibuf (minibufferp buffer1))
|
|
result pos-before pos-after
|
|
(search-and-store
|
|
(lambda (pattern direction)
|
|
(while (and (<= (length result) limit)
|
|
(cl-case direction
|
|
(1 (search-forward pattern nil t))
|
|
(-1 (search-backward pattern nil t))
|
|
(2 (let ((pos
|
|
(save-excursion
|
|
(forward-line
|
|
helm-dabbrev-lineno-around)
|
|
(point))))
|
|
(setq pos-after pos)
|
|
(search-forward pattern pos t)))
|
|
(-2 (let ((pos
|
|
(save-excursion
|
|
(forward-line
|
|
(- helm-dabbrev-lineno-around))
|
|
(point))))
|
|
(setq pos-before pos)
|
|
(search-backward pattern pos t)))))
|
|
(let* ((pbeg (match-beginning 0))
|
|
(replace-regexp (concat "\\(" helm-dabbrev-separator-regexp
|
|
"\\)\\'"))
|
|
(match-word (helm-dabbrev--search
|
|
pattern pbeg replace-regexp)))
|
|
(when (and match-word (not (member match-word result)))
|
|
(push match-word result)))))))
|
|
(catch 'break
|
|
(dolist (buf (if all (helm-dabbrev--buffer-list)
|
|
(list (current-buffer))))
|
|
(with-current-buffer buf
|
|
(when (or minibuf ; check against all buffers when in minibuffer.
|
|
(if helm-dabbrev-related-buffer-fn
|
|
(funcall helm-dabbrev-related-buffer-fn buffer1)
|
|
t))
|
|
(save-excursion
|
|
;; Start searching before thing before point.
|
|
(goto-char (- (point) (length str)))
|
|
;; Search the last 30 lines before point.
|
|
(funcall search-and-store str -2)) ; store pos [1]
|
|
(save-excursion
|
|
;; Search the next 30 lines after point.
|
|
(funcall search-and-store str 2)) ; store pos [2]
|
|
(save-excursion
|
|
;; Search all before point.
|
|
;; If limit is reached in previous call of
|
|
;; search-and-store pos-before is never set and
|
|
;; goto-char will fail, so check it.
|
|
(when pos-before
|
|
(goto-char pos-before) ; start from [1]
|
|
(funcall search-and-store str -1)))
|
|
(save-excursion
|
|
;; Search all after point.
|
|
;; Same comment as above for pos-after.
|
|
(when pos-after
|
|
(goto-char pos-after) ; start from [2]
|
|
(funcall search-and-store str 1)))))
|
|
(when (>= (length result) limit) (throw 'break nil))))
|
|
(nreverse result)))
|
|
|
|
(defun helm-dabbrev--search (pattern beg sep-regexp)
|
|
"Search word or symbol at point matching PATTERN.
|
|
Argument BEG is corresponding to the previous match-beginning search.
|
|
The search starts at (1- BEG) with a regexp starting with
|
|
`helm-dabbrev-separator-regexp' followed by PATTERN followed by a
|
|
regexp matching syntactically any word or symbol.
|
|
The possible false positives matching SEP-REGEXP at end are finally
|
|
removed."
|
|
(let ((eol (point-at-eol)))
|
|
(save-excursion
|
|
(goto-char (1- beg))
|
|
(when (re-search-forward
|
|
(concat "\\("
|
|
helm-dabbrev-separator-regexp
|
|
"\\)"
|
|
"\\(?99:\\("
|
|
(regexp-quote pattern)
|
|
"\\(\\sw\\|\\s_\\)+\\)\\)")
|
|
eol t)
|
|
(replace-regexp-in-string
|
|
sep-regexp ""
|
|
(match-string-no-properties 99))))))
|
|
|
|
(defun helm-dabbrev--get-candidates (dabbrev &optional limit)
|
|
(cl-assert dabbrev nil "[No Match]")
|
|
(helm-dabbrev--collect
|
|
dabbrev (or limit helm-dabbrev-candidates-number-limit)
|
|
(cl-case helm-dabbrev-case-fold-search
|
|
(smart (helm-set-case-fold-search-1 dabbrev))
|
|
(t helm-dabbrev-case-fold-search))
|
|
helm-dabbrev-always-search-all))
|
|
|
|
(defun helm-dabbrev-default-action (candidate)
|
|
(with-helm-current-buffer
|
|
(let* ((limits (helm-bounds-of-thing-before-point
|
|
helm-dabbrev-separator-regexp))
|
|
(beg (car limits))
|
|
(end (point)))
|
|
(run-with-timer
|
|
0.01 nil
|
|
'helm-insert-completion-at-point
|
|
beg end candidate))))
|
|
|
|
;;;###autoload
|
|
(cl-defun helm-dabbrev ()
|
|
"Preconfigured helm for dynamic abbreviations."
|
|
(interactive)
|
|
(let ((dabbrev (helm-thing-before-point
|
|
nil helm-dabbrev-separator-regexp))
|
|
(limits (helm-bounds-of-thing-before-point
|
|
helm-dabbrev-separator-regexp))
|
|
(enable-recursive-minibuffers t)
|
|
(cycling-disabled-p (or (null helm-dabbrev-cycle-threshold)
|
|
(zerop helm-dabbrev-cycle-threshold)))
|
|
(helm-execute-action-at-once-if-one t)
|
|
(helm-quit-if-no-candidate
|
|
(lambda ()
|
|
(message "[Helm-dabbrev: No expansion found]"))))
|
|
(cl-assert (and (stringp dabbrev) (not (string= dabbrev "")))
|
|
nil "[Helm-dabbrev: Nothing found before point]")
|
|
(when (and
|
|
;; have been called at least once.
|
|
(helm-dabbrev-info-p helm-dabbrev--data)
|
|
;; But user have moved with some other command
|
|
;; in the meaning time.
|
|
(not (eq last-command 'helm-dabbrev)))
|
|
(setq helm-dabbrev--data nil))
|
|
;; When candidates are requested in helm directly without cycling,
|
|
;; we need them right now before running helm, so no need to use a
|
|
;; thread here.
|
|
(when cycling-disabled-p
|
|
(setq helm-dabbrev--cache (helm-dabbrev--get-candidates dabbrev)))
|
|
(unless (or cycling-disabled-p
|
|
(helm-dabbrev-info-p helm-dabbrev--data))
|
|
(setq helm-dabbrev--data
|
|
(make-helm-dabbrev-info
|
|
:dabbrev dabbrev
|
|
:limits limits
|
|
:iterator
|
|
(helm-iter-list
|
|
(cl-loop for i in (helm-dabbrev--get-candidates
|
|
dabbrev helm-dabbrev-cycle-threshold)
|
|
when (string-match-p
|
|
(concat "^" (regexp-quote dabbrev)) i)
|
|
collect i))))
|
|
;; Thread is released as soon as helm-dabbrev exits after first
|
|
;; insertion so this is unusable for now, keep it like this for
|
|
;; now hooping the situation with threads will be improved in
|
|
;; emacs. The idea is to compute whole list of candidates in
|
|
;; background while cycling with the first
|
|
;; helm-dabbrev-cycle-threshold ones.
|
|
(when (and (fboundp 'make-thread) helm-dabbrev-use-thread)
|
|
(setq helm-dabbrev--current-thread
|
|
(make-thread
|
|
(lambda ()
|
|
(setq helm-dabbrev--cache
|
|
(helm-dabbrev--get-candidates dabbrev)))))))
|
|
(let ((iter (and (helm-dabbrev-info-p helm-dabbrev--data)
|
|
(helm-dabbrev-info-iterator helm-dabbrev--data)))
|
|
deactivate-mark)
|
|
;; Cycle until iterator is consumed.
|
|
(helm-aif (and iter (helm-iter-next iter))
|
|
(progn
|
|
(helm-insert-completion-at-point
|
|
(car (helm-dabbrev-info-limits helm-dabbrev--data))
|
|
;; END is the end of the previous inserted string, not
|
|
;; the end (apart for first insertion) of the initial string.
|
|
(cdr limits) it)
|
|
;; Move already tried candidates to end of list.
|
|
(push it helm-dabbrev--already-tried))
|
|
;; Iterator is now empty, reset dabbrev to initial value
|
|
;; and start helm completion.
|
|
(let* ((old-dabbrev (if (helm-dabbrev-info-p helm-dabbrev--data)
|
|
(helm-dabbrev-info-dabbrev helm-dabbrev--data)
|
|
dabbrev))
|
|
(only-one (null (cdr (all-completions
|
|
old-dabbrev
|
|
helm-dabbrev--already-tried)))))
|
|
(unless helm-dabbrev-use-thread
|
|
(message "Waiting for helm-dabbrev candidates...")
|
|
(setq helm-dabbrev--cache
|
|
(helm-dabbrev--get-candidates old-dabbrev)))
|
|
;; If the length of candidates is only one when computed
|
|
;; that's mean the unique matched item have already been
|
|
;; inserted by the iterator, so no need to reinsert the old dabbrev,
|
|
;; just let helm exiting with "No expansion found".
|
|
(unless (or only-one cycling-disabled-p)
|
|
(setq dabbrev old-dabbrev
|
|
limits (helm-dabbrev-info-limits helm-dabbrev--data))
|
|
(setq helm-dabbrev--data nil)
|
|
(delete-region (car limits) (point))
|
|
(insert dabbrev))
|
|
;; Cycling is finished, block until helm-dabbrev--cache have
|
|
;; finished to complete.
|
|
(when (and (fboundp 'thread-join)
|
|
helm-dabbrev-use-thread
|
|
(thread-alive-p helm-dabbrev--current-thread))
|
|
(thread-join helm-dabbrev--current-thread))
|
|
(when (and (null cycling-disabled-p) only-one)
|
|
(cl-return-from helm-dabbrev
|
|
(message "[Helm-dabbrev: No expansion found]")))
|
|
(with-helm-show-completion (car limits) (cdr limits)
|
|
(unwind-protect
|
|
(helm :sources
|
|
(helm-build-in-buffer-source "Dabbrev Expand"
|
|
:data
|
|
(cl-loop for cand in helm-dabbrev--cache
|
|
unless
|
|
(member cand helm-dabbrev--already-tried)
|
|
collect cand into lst
|
|
finally return
|
|
(append lst helm-dabbrev--already-tried))
|
|
:persistent-action 'ignore
|
|
:persistent-help "DoNothing"
|
|
:keymap helm-dabbrev-map
|
|
:action 'helm-dabbrev-default-action
|
|
:group 'helm-dabbrev)
|
|
:buffer "*helm dabbrev*"
|
|
:input (concat "^" dabbrev " ")
|
|
:resume 'noresume
|
|
:allow-nest t)
|
|
(setq helm-dabbrev--already-tried nil))))))))
|
|
|
|
(provide 'helm-dabbrev)
|
|
|
|
;; Local Variables:
|
|
;; byte-compile-warnings: (not obsolete)
|
|
;; coding: utf-8
|
|
;; indent-tabs-mode: nil
|
|
;; End:
|
|
|
|
;;; helm-dabbrev.el ends here
|