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helm-multi-match.el
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helm-multi-match.el
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;;; helm-multi-match.el --- Multiple regexp matching methods for helm -*- lexical-binding: t -*-
;; Original Author: rubikitch
;; Copyright (C) 2008 ~ 2011 rubikitch
;; Copyright (C) 2011 ~ 2020 Thierry Volpiatto <thierry.volpiatto@gmail.com>
;; Author: Thierry Volpiatto <thierry.volpiatto@gmail.com>
;; URL: http://github.com/emacs-helm/helm
;; 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 'cl-lib)
(require 'helm-lib)
(defgroup helm-multi-match nil
"Helm multi match."
:group 'helm)
(defcustom helm-mm-matching-method 'multi3
"Matching method for helm match plugin.
You can set here different methods to match candidates in helm.
Here are the possible value of this symbol and their meaning:
- multi1: Respect order, prefix of pattern must match.
- multi2: Same but with partial match.
- multi3: The best, multiple regexp match, allow negation.
- multi3p: Same but prefix must match.
Default is multi3, you should keep this for a better experience.
Note that multi1 and multi3p are incompatible with fuzzy matching
in file completion and by the way fuzzy matching will be disabled there
when these options are used."
:type '(radio :tag "Matching methods for helm"
(const :tag "Multiple regexp 1 ordered with prefix match" multi1)
(const :tag "Multiple regexp 2 ordered with partial match" multi2)
(const :tag "Multiple regexp 3 matching no order, partial, best." multi3)
(const :tag "Multiple regexp 3p matching with prefix match" multi3p))
:group 'helm-multi-match)
;; Internal
(defvar helm-mm-default-match-functions
'(helm-mm-exact-match helm-mm-match))
(defvar helm-mm-default-search-functions
'(helm-mm-exact-search helm-mm-search))
;;; Build regexps
;;
;;
(defconst helm-mm-space-regexp "\\s\\\\s-"
"Regexp to represent space itself in multiple regexp match.")
(defun helm-mm-split-pattern (pattern &optional grep-space)
"Split PATTERN if it contains spaces and return resulting list.
If spaces in PATTERN are escaped, don't split at this place.
i.e \"foo bar baz\"=> (\"foo\" \"bar\" \"baz\")
but \"foo\\ bar baz\"=> (\"foo\\s-bar\" \"baz\").
If GREP-SPACE is used translate escaped space to \"\\s\" instead of \"\\s-\"."
(split-string
;; Match spaces litteraly because candidate buffer syntax-table
;; doesn't understand "\s-" properly.
(replace-regexp-in-string
helm-mm-space-regexp
(if grep-space "\\s" "\\s-") pattern nil t)))
(defun helm-mm-1-make-regexp (pattern)
"Replace spaces in PATTERN with \"\.*\"."
(mapconcat 'identity (helm-mm-split-pattern pattern) ".*"))
;;; Exact match.
;;
;;
;; Internal.
(defvar helm-mm-exact-pattern-str nil)
(defvar helm-mm-exact-pattern-real nil)
(defun helm-mm-exact-get-pattern (pattern)
(unless (equal pattern helm-mm-exact-pattern-str)
(setq helm-mm-exact-pattern-str pattern
helm-mm-exact-pattern-real (concat "\n" pattern "\n")))
helm-mm-exact-pattern-real)
(cl-defun helm-mm-exact-match (candidate &optional (pattern helm-pattern))
(if case-fold-search
(progn
(setq candidate (downcase candidate)
pattern (downcase pattern))
(string= candidate pattern))
(string= candidate pattern)))
(defun helm-mm-exact-search (pattern &rest _ignore)
(and (search-forward (helm-mm-exact-get-pattern pattern) nil t)
(forward-line -1)))
;;; Prefix match
;;
;;
;; Internal
(defvar helm-mm-prefix-pattern-str nil)
(defvar helm-mm-prefix-pattern-real nil)
(defun helm-mm-prefix-get-pattern (pattern)
(unless (equal pattern helm-mm-prefix-pattern-str)
(setq helm-mm-prefix-pattern-str pattern
helm-mm-prefix-pattern-real (concat "\n" pattern)))
helm-mm-prefix-pattern-real)
(defun helm-mm-prefix-match (candidate &optional pattern)
;; In filename completion basename and basedir may be
;; quoted, unquote them for string comparison (Bug#1283).
(setq pattern (replace-regexp-in-string
"\\\\" "" (or pattern helm-pattern)))
(let ((len (length pattern)))
(and (<= len (length candidate))
(string= (substring candidate 0 len) pattern ))))
(defun helm-mm-prefix-search (pattern &rest _ignore)
(search-forward (helm-mm-prefix-get-pattern pattern) nil t))
;;; Multiple regexp patterns 1 (order is preserved / prefix).
;;
;;
;; Internal
(defvar helm-mm-1-pattern-str nil)
(defvar helm-mm-1-pattern-real nil)
(defun helm-mm-1-get-pattern (pattern)
(unless (equal pattern helm-mm-1-pattern-str)
(setq helm-mm-1-pattern-str pattern
helm-mm-1-pattern-real
(concat "^" (helm-mm-1-make-regexp pattern))))
helm-mm-1-pattern-real)
(cl-defun helm-mm-1-match (candidate &optional (pattern helm-pattern))
(string-match (helm-mm-1-get-pattern pattern) candidate))
(defun helm-mm-1-search (pattern &rest _ignore)
(re-search-forward (helm-mm-1-get-pattern pattern) nil t))
;;; Multiple regexp patterns 2 (order is preserved / partial).
;;
;;
;; Internal
(defvar helm-mm-2-pattern-str nil)
(defvar helm-mm-2-pattern-real nil)
(defun helm-mm-2-get-pattern (pattern)
(unless (equal pattern helm-mm-2-pattern-str)
(setq helm-mm-2-pattern-str pattern
helm-mm-2-pattern-real
(concat "^.*" (helm-mm-1-make-regexp pattern))))
helm-mm-2-pattern-real)
(cl-defun helm-mm-2-match (candidate &optional (pattern helm-pattern))
(string-match (helm-mm-2-get-pattern pattern) candidate))
(defun helm-mm-2-search (pattern &rest _ignore)
(re-search-forward (helm-mm-2-get-pattern pattern) nil t))
;;; Multiple regexp patterns 3 (permutation).
;;
;;
;; Internal
(defvar helm-mm--3-pattern-str nil)
(defvar helm-mm--3-pattern-list nil)
(defun helm-mm-3-get-patterns (pattern)
"Return a list of predicate/regexp cons cells.
E.g., ((identity . \"foo\") (not . \"bar\")).
If PATTERN is unchanged, don't recompute PATTERN and return the
previous value stored in `helm-mm--3-pattern-list'."
(unless (equal pattern helm-mm--3-pattern-str)
(setq helm-mm--3-pattern-str pattern
helm-mm--3-pattern-list
(helm-mm-3-get-patterns-internal pattern)))
helm-mm--3-pattern-list)
(defun helm-mm-3-get-patterns-internal (pattern)
"Return a list of predicate/regexp cons cells.
E.g., ((identity . \"foo\") (not . \"bar\"))."
(unless (string= pattern "")
(cl-loop for pat in (helm-mm-split-pattern pattern)
collect (if (char-equal ?! (aref pat 0))
(cons 'not (substring pat 1))
(cons 'identity pat)))))
(cl-defun helm-mm-3-match (candidate &optional (pattern helm-pattern))
"Check if PATTERN match CANDIDATE.
When PATTERN contains a space, it is splitted and matching is
done with the several resulting regexps against CANDIDATE.
E.g., \"bar foo\" will match \"foobar\" and \"barfoo\".
Argument PATTERN, a string, is transformed in a list of cons cell
with `helm-mm-3-get-patterns' if it contains a space.
E.g., \"foo bar\"=>((identity . \"foo\") (identity . \"bar\")).
Then each predicate of cons cell(s) is called with the regexp of
the same cons cell against CANDIDATE.
I.e. (identity (string-match \"foo\" \"foo bar\")) => t."
(let ((pat (helm-mm-3-get-patterns pattern)))
(cl-loop for (predicate . regexp) in pat
always (funcall predicate
(condition-case _err
;; FIXME: Probably do nothing when
;; using fuzzy leaving the job
;; to the fuzzy fn.
(string-match regexp candidate)
(invalid-regexp nil))))))
(defun helm-mm-3-search-base (pattern searchfn1 searchfn2)
"Try to find PATTERN in `helm-buffer' with SEARCHFN1 and SEARCHFN2.
This is the search function for `candidates-in-buffer' enabled sources.
Use the same method as `helm-mm-3-match' except it search in buffer
instead of matching on a string.
i.e (identity (re-search-forward \"foo\" (point-at-eol) t)) => t."
(cl-loop with pat = (if (stringp pattern)
(helm-mm-3-get-patterns pattern)
pattern)
when (eq (caar pat) 'not) return
;; Pass the job to `helm-search-match-part'.
(prog1 (list (point-at-bol) (point-at-eol))
(forward-line 1))
while (condition-case _err
(funcall searchfn1 (or (cdar pat) "") nil t)
(invalid-regexp nil))
for bol = (point-at-bol)
for eol = (point-at-eol)
if (cl-loop for (pred . str) in (cdr pat) always
(progn (goto-char bol)
(funcall pred (condition-case _err
(funcall searchfn2 str eol t)
(invalid-regexp nil)))))
do (goto-char eol) and return t
else do (goto-char eol)
finally return nil))
(defun helm-mm-3-search (pattern &rest _ignore)
(when (stringp pattern)
(setq pattern (helm-mm-3-get-patterns pattern)))
(helm-mm-3-search-base
pattern 're-search-forward 're-search-forward))
;;; mp-3 with migemo
;; Needs https://github.com/emacs-jp/migemo
;;
(defvar helm-mm--previous-migemo-info nil
"[Internal] Cache previous migemo query.")
(make-local-variable 'helm-mm--previous-migemo-info)
(declare-function migemo-get-pattern "ext:migemo.el")
(declare-function migemo-search-pattern-get "ext:migemo.el")
(define-minor-mode helm-migemo-mode
"Enable migemo in helm.
It will be available in the sources handling it,
i.e. the sources which have the slot :migemo with non--nil value."
:lighter " Hmio"
:group 'helm
:global t
(cl-assert (featurep 'migemo)
nil "No feature called migemo found, install migemo.el."))
(defun helm-mm-migemo-get-pattern (pattern)
(let ((regex (migemo-get-pattern pattern)))
(if (ignore-errors (string-match regex "") t)
(concat regex "\\|" pattern) pattern)))
(defun helm-mm-migemo-search-pattern-get (pattern)
(let ((regex (migemo-search-pattern-get pattern)))
(if (ignore-errors (string-match regex "") t)
(concat regex "\\|" pattern) pattern)))
(defun helm-mm-migemo-string-match (pattern str)
"Migemo version of `string-match'."
(unless (assoc pattern helm-mm--previous-migemo-info)
(with-helm-buffer
(setq helm-mm--previous-migemo-info
(push (cons pattern (helm-mm-migemo-get-pattern pattern))
helm-mm--previous-migemo-info))))
(string-match (assoc-default pattern helm-mm--previous-migemo-info) str))
(cl-defun helm-mm-3-migemo-match (candidate &optional (pattern helm-pattern))
(and helm-migemo-mode
(cl-loop for (pred . re) in (helm-mm-3-get-patterns pattern)
always (funcall pred (helm-mm-migemo-string-match re candidate)))))
(defun helm-mm-migemo-forward (word &optional bound noerror count)
(with-helm-buffer
(unless (assoc word helm-mm--previous-migemo-info)
(setq helm-mm--previous-migemo-info
(push (cons word (if (delq 'ascii (find-charset-string word))
word
(helm-mm-migemo-search-pattern-get word)))
helm-mm--previous-migemo-info))))
(re-search-forward
(assoc-default word helm-mm--previous-migemo-info) bound noerror count))
(defun helm-mm-3-migemo-search (pattern &rest _ignore)
(and helm-migemo-mode
(helm-mm-3-search-base
pattern 'helm-mm-migemo-forward 'helm-mm-migemo-forward)))
;;; mp-3p- (multiple regexp pattern 3 with prefix search)
;;
;;
(defun helm-mm-3p-match (candidate &optional pattern)
"Check if PATTERN match CANDIDATE.
Same as `helm-mm-3-match' but only for the cdr of patterns, the car of
patterns must always match CANDIDATE prefix.
E.g. \"bar foo baz\" will match \"barfoobaz\" or \"barbazfoo\" but not
\"foobarbaz\" whereas `helm-mm-3-match' would match all."
(let* ((pat (helm-mm-3-get-patterns (or pattern helm-pattern)))
(first (car pat)))
(and (funcall (car first) (helm-mm-prefix-match candidate (cdr first)))
(cl-loop for (predicate . regexp) in (cdr pat)
always (funcall predicate (string-match regexp candidate))))))
(defun helm-mm-3p-search (pattern &rest _ignore)
(when (stringp pattern)
(setq pattern (helm-mm-3-get-patterns pattern)))
(helm-mm-3-search-base
pattern 'helm-mm-prefix-search 're-search-forward))
;;; Generic multi-match/search functions
;;
;;
(cl-defun helm-mm-match (candidate &optional (pattern helm-pattern))
"Call `helm-mm-matching-method' function against CANDIDATE."
(let ((fun (cl-ecase helm-mm-matching-method
(multi1 #'helm-mm-1-match)
(multi2 #'helm-mm-2-match)
(multi3 #'helm-mm-3-match)
(multi3p #'helm-mm-3p-match))))
(funcall fun candidate pattern)))
(defun helm-mm-search (pattern &rest _ignore)
"Search for PATTERN with `helm-mm-matching-method' function."
(let ((fun (cl-ecase helm-mm-matching-method
(multi1 #'helm-mm-1-search)
(multi2 #'helm-mm-2-search)
(multi3 #'helm-mm-3-search)
(multi3p #'helm-mm-3p-search))))
(funcall fun pattern)))
(provide 'helm-multi-match)
;;; helm-multi-match.el ends here