389 lines
17 KiB
EmacsLisp
389 lines
17 KiB
EmacsLisp
;;; helm-dabbrev.el --- Helm implementation of dabbrev. -*- lexical-binding: t -*-
|
||
|
||
;; Copyright (C) 2012 ~ 2023 Thierry Volpiatto
|
||
|
||
;; 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'."
|
||
:type 'boolean)
|
||
|
||
(defcustom helm-dabbrev-candidates-number-limit 1000
|
||
"Maximum number of candidates to collect.
|
||
|
||
The higher this number is, the 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', this means that computation of
|
||
candidates stop when this value is reached but only
|
||
`helm-candidate-number-limit' candidates are displayed in the
|
||
Helm buffer."
|
||
: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."
|
||
: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 its 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 an example.
|
||
|
||
When nil all buffers are considered related to `current-buffer'."
|
||
: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 has same `major-mode' than
|
||
the `current-buffer'.
|
||
|
||
This has 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))
|
||
|
||
(defcustom helm-dabbrev-lineno-around 30
|
||
"Search first in this number of lines before and after point."
|
||
:type 'integer)
|
||
|
||
(defcustom helm-dabbrev-cycle-threshold 5
|
||
"Number of time helm-dabbrev cycle before displaying helm completion.
|
||
When nil or 0 disable cycling."
|
||
: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)."
|
||
:type '(choice (const :tag "Ignore case" t)
|
||
(const :tag "Respect case" nil)
|
||
(other :tag "Smart" smart)))
|
||
|
||
(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--computing-cache nil
|
||
"[INTERNAL] Flag to notify helm-dabbrev is blocked.
|
||
Do nothing when non 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))
|
||
results pos-before pos-after)
|
||
(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 and set POS-BEFORE.
|
||
(cl-multiple-value-bind (res _pa pb)
|
||
(helm-dabbrev--search-and-store str -2 limit results)
|
||
(setq results res
|
||
;; No need to set POS-AFTER here.
|
||
pos-before pb)))
|
||
(save-excursion
|
||
;; Search the next 30 lines AFTER point and set POS-AFTER.
|
||
(cl-multiple-value-bind (res pa _pb)
|
||
(helm-dabbrev--search-and-store str 2 limit results)
|
||
(setq results res
|
||
;; No need to set POS-BEFORE, we keep the last
|
||
;; value found.
|
||
pos-after pa)))
|
||
(save-excursion
|
||
;; Search all BEFORE point maybe starting from
|
||
;; POS-BEFORE to not search again what previously found.
|
||
;; If limit is reached in previous call of
|
||
;; `helm-dabbrev--search-and-store' POS-BEFORE is nil and
|
||
;; goto-char will fail, so check it.
|
||
(when pos-before (goto-char pos-before))
|
||
(cl-multiple-value-bind (res _pa _pb)
|
||
(helm-dabbrev--search-and-store str -1 limit results)
|
||
;; No need to set POS-BEFORE and POS-AFTER here.
|
||
(setq results res)))
|
||
(save-excursion
|
||
;; Search all AFTER point maybe starting from POS-AFTER.
|
||
;; Same comment as above for POS-AFTER.
|
||
(when pos-after (goto-char pos-after))
|
||
(cl-multiple-value-bind (res _pa _pb)
|
||
(helm-dabbrev--search-and-store str 1 limit results)
|
||
;; No need to set POS-BEFORE and POS-AFTER here.
|
||
(setq results res)))))
|
||
(when (>= (length results) limit) (throw 'break nil))))
|
||
(nreverse results)))
|
||
|
||
(defun helm-dabbrev--search-and-store (pattern direction limit results)
|
||
"Search words or symbols matching PATTERN in DIRECTION up to LIMIT.
|
||
Finally returns all matched candidates appended to RESULTS.
|
||
Argument DIRECTION can be:
|
||
- (1): Search forward from point.
|
||
- (-1): Search backward from point.
|
||
- (2): Search forward from the
|
||
`helm-dabbrev-lineno-around'
|
||
lines after point.
|
||
- (-2): Search backward from the
|
||
`helm-dabbrev-lineno-around'
|
||
lines before point."
|
||
(let ((res results)
|
||
after before)
|
||
(while (and (<= (length res) 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 after pos)
|
||
(search-forward pattern pos t)))
|
||
(-2 (let ((pos
|
||
(save-excursion
|
||
(forward-line
|
||
(- helm-dabbrev-lineno-around))
|
||
(point))))
|
||
(setq before pos)
|
||
(search-backward pattern pos t)))))
|
||
(let* ((mb (match-beginning 0))
|
||
(replace-regexp (concat "\\(" helm-dabbrev-separator-regexp
|
||
"\\)\\'"))
|
||
(match-word (helm-dabbrev--search
|
||
pattern mb replace-regexp)))
|
||
(when (and match-word (not (member match-word res)))
|
||
(push match-word res))))
|
||
(list res after before)))
|
||
|
||
(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)
|
||
(unless helm-dabbrev--computing-cache
|
||
(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.
|
||
(when cycling-disabled-p
|
||
(message "Waiting for helm-dabbrev candidates...")
|
||
(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)))))
|
||
(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, or cycling was disabled, maybe
|
||
;; 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 (eq (length helm-dabbrev--already-tried) 1)))
|
||
(unless helm-dabbrev--cache ; Already computed when
|
||
; cycling is disabled.
|
||
(message "Waiting for helm-dabbrev candidates...")
|
||
(setq helm-dabbrev--computing-cache t)
|
||
(setq helm-dabbrev--cache
|
||
(helm-dabbrev--get-candidates old-dabbrev))
|
||
;; If user continues typing M-/ while display is blocked by
|
||
;; helm-dabbrev--get-candidates delete these events.
|
||
(setq unread-command-events nil))
|
||
;; 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))
|
||
(when (and (null cycling-disabled-p) only-one)
|
||
(setq helm-dabbrev--cache nil
|
||
helm-dabbrev--already-tried nil
|
||
helm-dabbrev--computing-cache nil)
|
||
(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
|
||
(append
|
||
(cl-loop with lst = helm-dabbrev--cache
|
||
for cand in helm-dabbrev--already-tried
|
||
do (setq lst (delete cand lst))
|
||
finally return 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--computing-cache nil
|
||
helm-dabbrev--already-tried nil
|
||
helm-dabbrev--cache nil)))))))))
|
||
|
||
(provide 'helm-dabbrev)
|
||
|
||
;;; helm-dabbrev.el ends here
|