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helm-mode.el
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helm-mode.el
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;;; helm-mode.el --- Enable helm completion everywhere. -*- lexical-binding: t -*-
;; Copyright (C) 2012 ~ 2019 Thierry Volpiatto <[email protected]>
;; 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)
(require 'helm-lib)
(require 'helm-files)
(defvar crm-separator)
(defvar ido-everywhere)
(defvar completion-flex-nospace)
(defvar helm-completion--sorting-done)
(defvar helm-mode)
(declare-function ido-mode "ido.el")
(declare-function helm-apropos-init "helm-elisp")
(declare-function helm-lisp-completion-persistent-action "helm-elisp")
(declare-function helm-lisp-completion-persistent-help "helm-elisp")
(defgroup helm-mode nil
"Enable helm completion."
:group 'helm)
(defcustom helm-completing-read-handlers-alist
'((find-tag . helm-completing-read-default-find-tag)
(xref-find-definitions . helm-completing-read-default-find-tag)
(xref-find-references . helm-completing-read-default-find-tag)
(ggtags-find-tag-dwim . helm-completing-read-default-find-tag)
(tmm-menubar . nil)
(find-file . nil)
(execute-extended-command . nil)
(dired-do-rename . helm-read-file-name-handler-1)
(dired-do-copy . helm-read-file-name-handler-1)
(dired-do-symlink . helm-read-file-name-handler-1)
(dired-do-relsymlink . helm-read-file-name-handler-1)
(dired-do-hardlink . helm-read-file-name-handler-1)
(basic-save-buffer . helm-read-file-name-handler-1)
(write-file . helm-read-file-name-handler-1)
(write-region . helm-read-file-name-handler-1))
"Completing read functions for specific Emacs commands.
By default `helm-mode' use `helm-completing-read-default-handler' to
provide helm completion in each `completing-read' or `read-file-name'
found, but other functions can be specified here for specific
commands. This also allows disabling helm completion for some commands
when needed.
Each entry is a cons cell like (EMACS_COMMAND . COMPLETING-READ_HANDLER)
where key and value are symbols.
Each key is an Emacs command that use originaly `completing-read'.
Each value maybe a helm function that takes same arguments as
`completing-read' plus NAME and BUFFER, where NAME is the name of the new
helm source and BUFFER the name of the buffer we will use, but it can
be also a function not using helm, in this case the function should
take the same args as `completing-read' and not be prefixed by \"helm-\".
`helm' will use the name of the command calling `completing-read' as
NAME and BUFFER will be computed as well with NAME but prefixed with
\"*helm-mode-\".
This function prefix name must start by \"helm-\" when it uses helm,
otherwise `helm' assumes the function is not a helm function and
expects the same args as `completing-read', this allows you to define a
handler not using helm completion.
Example:
(defun foo/test ()
(interactive)
(message \"%S\" (completing-read \"test: \" '(a b c d e))))
(defun helm-foo/test-completing-read-handler (prompt collection
predicate require-match
initial-input hist def
inherit-input-method
name buffer)
(helm-comp-read prompt collection :marked-candidates t
:name name
:buffer buffer))
(add-to-list 'helm-completing-read-handlers-alist
'(foo/test . helm-foo/test-completing-read-handler))
We want here to make the regular `completing-read' in `foo/test'
return a list of candidate(s) instead of a single candidate.
Note that this function will be reused for ALL the `completing-read'
of this command, so it should handle all cases. E.g.,
if first `completing-read' completes against symbols and
second `completing-read' should handle only buffer,
your specialized function should handle both.
If the value of an entry is nil completion will fall back to
Emacs vanilla behaviour.
Example:
If you want to disable helm completion for `describe-function', use:
(describe-function . nil)
Ido is also supported, you can use `ido-completing-read' and
`ido-read-file-name' as value of an entry or just 'ido.
Example:
Enable ido completion for `find-file':
(find-file . ido)
same as
(find-file . ido-read-file-name)
Note that you don't need to enable `ido-mode' for this to work, see
`helm-mode' documentation."
:group 'helm-mode
:type '(alist :key-type symbol :value-type symbol))
(defcustom helm-comp-read-case-fold-search helm-case-fold-search
"Default Local setting of `helm-case-fold-search' for `helm-comp-read'.
See `helm-case-fold-search' for more info."
:group 'helm-mode
:type 'symbol)
(defcustom helm-mode-handle-completion-in-region t
"Whether to replace or not `completion-in-region-function'.
This enables support for `completing-read-multiple' and `completion-at-point'
when non--nil."
:group 'helm-mode
:type 'boolean)
(defcustom helm-mode-no-completion-in-region-in-modes nil
"A list of modes that do not want helm for `completion-in-region'."
:group 'helm-mode
:type 'boolean)
(defcustom helm-mode-reverse-history t
"Display history source after current source when non nil.
Apply only in `helm-mode' handled commands."
:group 'helm-mode
:type 'boolean)
(defcustom helm-completion-in-region-default-sort-fn
'helm-completion-in-region-sort-fn
"The default sort function to sort candidates in completion-in-region.
When nil no sorting is done.
The function is a `filtered-candidate-transformer' function which takes
two args CANDIDATES and SOURCE.
The function must use the flag `helm-completion--sorting-done' and
return CANDIDATES unchanged when the flag is nil.
See default function `helm-completion-in-region-sort-fn' as example.
It will be used only when `helm-completion-style' is either Emacs or
helm, otherwise when helm-fuzzy style is used, the fuzzy sort function
will be used."
:group 'helm-mode
:type 'function)
(defcustom helm-mode-fuzzy-match nil
"Enable fuzzy matching in `helm-mode' globally.
This is deprecated, use instead helm-fuzzy as `helm-completion-style' or
even better 'emacs as `helm-completion-style' and add 'flex to
`completion-styles' (emacs-27) or 'helm-flex if 'flex is not available
in `completion-styles-alist' (emacs-26)."
:group 'helm-mode
:type 'boolean)
(make-obsolete-variable 'helm-mode-fuzzy-match 'helm-completion-style "3.6.0")
(defcustom helm-completion-mark-suffix t
"Push mark at end of suffix when non nil."
:group 'helm-mode
:type 'boolean)
(defvar helm-mode-minibuffer-setup-hook-black-list '(minibuffer-completion-help)
"Incompatible `minibuffer-setup-hook' functions go here.
A list of symbols. `helm-mode' is rejecting all lambda's, byte-code fns
and all functions belonging in this list from `minibuffer-setup-hook'.
This is mainly needed to prevent \"*Completions*\" buffers to popup.")
(defface helm-mode-prefix
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
(:background "red" :foreground "black")))
"Face used for prefix completion."
:group 'helm-mode)
(defvar helm-comp-read-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map helm-map)
(define-key map (kbd "<C-return>") 'helm-cr-empty-string)
(define-key map (kbd "M-RET") 'helm-cr-empty-string)
map)
"Keymap for `helm-comp-read'.")
(defun helm-mode-delete-char-backward-1 ()
(interactive)
(condition-case err
(call-interactively 'delete-backward-char)
(text-read-only
(if (with-selected-window (minibuffer-window)
(not (string= (minibuffer-contents) "")))
(message "Trying to delete prefix completion, next hit will quit")
(user-error "%s" (car err))))))
(put 'helm-mode-delete-char-backward-1 'helm-only t)
(defun helm-mode-delete-char-backward-2 ()
(interactive)
(condition-case _err
(call-interactively 'delete-backward-char)
(text-read-only
(unless (with-selected-window (minibuffer-window)
(string= (minibuffer-contents) ""))
(with-helm-current-buffer
(run-with-timer 0.1 nil (lambda ()
(call-interactively 'delete-backward-char))))
(helm-keyboard-quit)))))
(put 'helm-mode-delete-char-backward-2 'helm-only t)
(helm-multi-key-defun helm-mode-delete-char-backward-maybe
"Delete char backward when text is not the prefix helm is completing against.
First call warns user about deleting prefix completion.
Second call deletes backward char in current-buffer and quits helm completion,
letting the user start a new completion with a new prefix."
'(helm-mode-delete-char-backward-1 helm-mode-delete-char-backward-2) 1)
(defcustom helm-completion-style 'emacs
"Style of completion to use in `completion-in-region'.
This affects only `completion-at-point' and friends, and
the `completing-read' using the default handler
i.e. `helm-completing-read-default-handler'.
NB: This has nothing to do with `completion-styles', it is independent from
helm, but when using 'emacs as helm-completion-style helm
will use the `completion-styles' for its completions.
Up to the user to configure `completion-styles'.
There are three possible values to use:
- helm, use multi match regular helm completion.
- helm-fuzzy, use fuzzy matching. Note that as usual when
entering a space helm switch to multi matching mode.
- emacs, use regular Emacs completion according to
`completion-styles'. Note that even in this style, helm allows using
multi match. Emacs-27 provides a style called `flex' that can be used
aside `helm' style (see `completion-styles-alist'). When `flex' style
is not available (Emacs<27) helm provides `helm-flex' style which is similar to
`flex' and helm fuzzy matching.
For a better experience, if you don't know what to use, set
`completion-styles' to '(flex) if you are using emacs-27 or to
\'(helm-flex) if you are using emacs-26 and keep 'emacs as default
value for `helm-completion-style'. Advanced users can also have a
look to `completion-category-overrides' to set styles according to category.
Please use custom interface or `customize-set-variable' to set this,
NOT `setq'."
:group 'helm-mode
:type '(choice (const :tag "Emacs" emacs)
(const :tag "Helm" helm)
(const :tag "Helm-fuzzy" helm-fuzzy))
:set (lambda (var val)
(set var val)
(if (memq val '(helm helm-fuzzy))
(define-key helm-comp-read-map (kbd "DEL") 'helm-mode-delete-char-backward-maybe)
(define-key helm-comp-read-map (kbd "DEL") 'delete-backward-char))))
(defconst helm-completion--all-styles
(let ((flex (if (assq 'flex completion-styles-alist)
'flex 'helm-flex)))
(helm-fast-remove-dups
(append (list 'helm flex)
(mapcar 'car completion-styles-alist)))))
(defconst helm-completion--styles-type
`(repeat :tag "with other completion styles"
(choice ,@(mapcar (lambda (x) (list 'const x))
helm-completion--all-styles))))
(defcustom helm-completion-styles-alist '((gud-mode . helm))
"Allow configuring `helm-completion-style' per mode.
Each entry is a cons cell like (mode . style) where style must be a
suitable value for `helm-completion-style'.
When specifying emacs as style for a mode, `completion-styles' can be
specified by using a cons cell specifying completion-styles to use
with helm emacs style, e.g. (foo-mode . (emacs helm flex)) will set
`completion-styles' to '(helm flex) for foo-mode. This affects only
completions happening in buffers and not minibuffer completions,
i.e. completing-read's."
:group 'helm-mode
:type
`(alist :key-type (symbol :tag "Major Mode")
:value-type
(choice :tag "Use helm style or completion styles"
(radio :tag "Helm Style"
(const helm)
(const helm-fuzzy)
(const emacs))
(cons :tag "Completion Styles"
(const :tag "Using Helm `emacs' style" emacs)
,helm-completion--styles-type))))
;;; helm-comp-read
;;
;;
(defvar helm-comp-read-use-marked nil
"[INTERNAL] When non nil `helm-comp-read' will return marked candidates.
Use this ONLY in `let', NOT globally, this allows third party packages
to use a list as return value when `helm-mode' is enabled, e.g.
(let ((helm-comp-read-use-marked t))
(completing-read \"test: \" '(a b c d e f g)))
")
(defun helm-cr-empty-string ()
"Return empty string."
(interactive)
(with-helm-alive-p
(helm-exit-and-execute-action
(lambda (_candidate)
(identity "")))))
(put 'helm-cr-empty-string 'helm-only t)
(defun helm-mode--keyboard-quit ()
;; Use this instead of `keyboard-quit'
;; to avoid deactivating mark in current-buffer.
(let ((debug-on-quit nil))
(signal 'quit nil)))
(cl-defun helm-comp-read-get-candidates (collection &optional
test sort-fn alistp
(input helm-pattern))
"Convert COLLECTION to list removing elements that don't match TEST.
See `helm-comp-read' about supported COLLECTION arguments.
SORT-FN is a predicate to sort COLLECTION.
ALISTP when non--nil will not use `all-completions' to collect
candidates because it doesn't handle alists correctly for helm.
i.e In `all-completions' the car of each pair is used as value.
In helm we want to use the cdr instead like \(display . real\),
so we return the alist as it is with no transformation by
`all-completions'.
e.g
\(setq A '((a . 1) (b . 2) (c . 3)))
==>((a . 1) (b . 2) (c . 3))
\(helm-comp-read \"test: \" A :alistp nil
:exec-when-only-one t
:initial-input \"a\")
==>\"a\" Which is not what we expect.
\(helm-comp-read \"test: \" A :alistp t
:exec-when-only-one t
:initial-input \"1\")
==>\"1\"
See docstring of `all-completions' for more info.
INPUT is the string you want to complete against, defaulting to
`helm-pattern' which is the value of what you enter in minibuffer.
Note that when using a function as COLLECTION this value will be
available with the input argument of the function only when using a
sync source from `helm-comp-read', i.e. not using
`:candidates-in-buffer', otherwise the function is called only once
with an empty string as value for `helm-pattern' because
`helm-pattern' is not yet computed, which is what we want otherwise
data would not be fully collected at init time.
If COLLECTION is an `obarray', a TEST should be needed. See `obarray'."
;; Ensure COLLECTION is computed from `helm-current-buffer'
;; because some functions used as COLLECTION work
;; only in the context of current-buffer (Issue #1030) .
(with-helm-current-buffer
(let ((cands
(cond ((vectorp collection)
(all-completions input collection test))
((and (symbolp collection) (boundp collection)
;; Issue #324 history is let-bounded and given
;; quoted as hist argument of completing-read.
;; See example in `rcirc-browse-url'.
(symbolp (symbol-value collection)))
nil)
;; When collection is a symbol, most of the time
;; it should be a symbol used as a minibuffer-history.
;; The value of this symbol in this case return a list
;; of string which maybe are converted later as symbol
;; in special cases.
;; we treat here commandp as a special case as it return t
;; also with a string unless its last arg is provided.
;; Also, the history collections generally collect their
;; elements as string, so intern them to call predicate.
((and (symbolp collection) (boundp collection) test)
(let ((predicate (lambda (elm)
(condition-case _err
(if (eq test 'commandp)
(funcall test (intern elm))
(funcall test elm))
(wrong-type-argument
(funcall test (intern elm)))))))
(all-completions input (symbol-value collection) predicate)))
((and (symbolp collection) (boundp collection))
(all-completions input (symbol-value collection)))
;; Normally file completion should not be handled here,
;; but special cases like `find-file-at-point' do it.
;; Handle here specially such cases.
((and (functionp collection) (not (string= input ""))
(or minibuffer-completing-file-name
(eq (completion-metadata-get
(completion-metadata input collection test)
'category)
'file)))
(cl-loop for f in (funcall collection input test t)
unless (member f '("./" "../"))
if (string-match helm--url-regexp input)
collect f
else
collect (concat (file-name-as-directory
(helm-basedir input))
f)))
((functionp collection)
(funcall collection input test t))
((and alistp (null test)) collection)
;; Next test ensure circular objects are removed
;; with `all-completions' (Issue #1530).
(t (all-completions input collection test)))))
(if sort-fn (sort cands sort-fn) cands))))
(defun helm-cr--pattern-in-candidates-p (candidates)
(or (assoc helm-pattern candidates)
(assq (intern helm-pattern) candidates)
(member helm-pattern candidates)
(member (downcase helm-pattern) candidates)
(member (upcase helm-pattern) candidates)))
(defun helm-cr-default-transformer (candidates source)
"Default filter candidate function for `helm-comp-read'."
(let ((must-match (helm-attr 'must-match source))
unknown-pattern)
(unless (or (eq must-match t)
(string= helm-pattern "")
;; Check if pattern is already member of candidates.
(helm-cr--pattern-in-candidates-p candidates))
(setq candidates (append (list
;; Unquote helm-pattern
;; when it is added
;; as candidate: Why? #2015
;; (replace-regexp-in-string
;; "\\s\\" "" helm-pattern)
helm-pattern)
candidates))
;; Notify pattern have been added to candidates.
(setq unknown-pattern t))
(cl-loop for c in candidates
for cand = (if (stringp c)
(replace-regexp-in-string "\\s\\" "" c)
c)
for pat = (replace-regexp-in-string "\\s\\" "" helm-pattern)
if (and (or (equal c pat) (equal c helm-pattern))
unknown-pattern)
collect
(cons (concat (propertize
" " 'display
(propertize "[?]" 'face 'helm-ff-prefix))
c)
c)
into lst
else collect (if (and (stringp cand)
(string-match "\n" cand))
(cons (replace-regexp-in-string "\n" "->" c) c)
c)
into lst
finally return (helm-fast-remove-dups lst :test 'equal))))
(defun helm-comp-read--move-to-first-real-candidate ()
(helm-aif (helm-get-selection nil 'withprop)
;; Avoid error with candidates with an image as display (#2296).
(when (equal (get-text-property 0 'display it) "[?]")
(helm-next-line))))
(defun helm-cr-default (default cands)
(delq nil
(cond ((and (stringp default)
(not (string= default ""))
(string= helm-pattern ""))
(cons default (delete default cands)))
((and (consp default) (string= helm-pattern ""))
(append (cl-loop for d in default
;; Don't convert
;; nil to "nil" (i.e the string)
;; it will be delq'ed on top.
for str = (if (null d) d (helm-stringify d))
when (member str cands)
do (setq cands (delete d cands))
when str collect str)
cands))
(t cands))))
;;;###autoload
(cl-defun helm-comp-read (prompt collection
&key
test
initial-input
default
preselect
(buffer "*Helm Completions*")
must-match
fuzzy
reverse-history
(requires-pattern 0)
history
input-history
(case-fold helm-comp-read-case-fold-search)
(del-input t)
(persistent-action nil)
(persistent-help "DoNothing")
(mode-line helm-comp-read-mode-line)
help-message
(keymap helm-comp-read-map)
(name "Helm Completions")
header-name
candidates-in-buffer
match-part
match-dynamic
exec-when-only-one
quit-when-no-cand
(volatile t)
sort
fc-transformer
hist-fc-transformer
(marked-candidates helm-comp-read-use-marked)
nomark
(alistp t)
(candidate-number-limit helm-candidate-number-limit)
multiline
allow-nest
coerce
(group 'helm))
"Read a string in the minibuffer, with helm completion.
It is helm `completing-read' equivalent.
- PROMPT is the prompt name to use.
- COLLECTION can be a list, vector, obarray or hash-table.
It can be also a function that receives three arguments:
the values string, predicate and t. See `all-completions' for more details.
Keys description:
- TEST: A predicate called with one arg i.e candidate.
- INITIAL-INPUT: Same as input arg in `helm'.
- PRESELECT: See preselect arg of `helm'.
- DEFAULT: This option is used only for compatibility with regular
Emacs `completing-read' (Same as DEFAULT arg of `completing-read').
- BUFFER: Name of helm-buffer.
- MUST-MATCH: Candidate selected must be one of COLLECTION.
- FUZZY: Enable fuzzy matching.
- REVERSE-HISTORY: When non--nil display history source after current
source completion.
- REQUIRES-PATTERN: Same as helm attribute, default is 0.
- HISTORY: A list containing specific history, default is nil.
When it is non--nil, all elements of HISTORY are displayed in
a special source before COLLECTION.
- INPUT-HISTORY: A symbol. The minibuffer input history will be
stored there, if nil or not provided, `minibuffer-history'
will be used instead.
- CASE-FOLD: Same as `helm-case-fold-search'.
- DEL-INPUT: Boolean, when non--nil (default) remove the partial
minibuffer input from HISTORY is present.
- PERSISTENT-ACTION: A function called with one arg i.e candidate.
- PERSISTENT-HELP: A string to document PERSISTENT-ACTION.
- MODE-LINE: A string or list to display in mode line.
Default is `helm-comp-read-mode-line'.
- KEYMAP: A keymap to use in this `helm-comp-read'.
(the keymap will be shared with history source)
- NAME: The name related to this local source.
- HEADER-NAME: A function to alter NAME, see `helm'.
- EXEC-WHEN-ONLY-ONE: Bound `helm-execute-action-at-once-if-one'
to non--nil. (possibles values are t or nil).
- VOLATILE: Use volatile attribute.
- SORT: A predicate to give to `sort' e.g `string-lessp'
Use this only on small data as it is inefficient.
If you want to sort faster add a sort function to
FC-TRANSFORMER.
Note that FUZZY when enabled is already providing a sort function.
- FC-TRANSFORMER: A `filtered-candidate-transformer' function
or a list of functions.
- HIST-FC-TRANSFORMER: A `filtered-candidate-transformer'
function for the history source.
- MARKED-CANDIDATES: If non--nil return candidate or marked candidates as a list.
- NOMARK: When non--nil don't allow marking candidates.
- ALISTP: (default is non--nil) See `helm-comp-read-get-candidates'.
- CANDIDATES-IN-BUFFER: when non--nil use a source build with
`helm-source-in-buffer' which is much faster.
Argument VOLATILE have no effect when CANDIDATES-IN-BUFFER is non--nil.
- MATCH-PART: Allow matching only one part of candidate.
See match-part documentation in `helm-source'.
- MATCH-DYNAMIC: See match-dynamic in `helm-source-sync'
It has no effect when used with CANDIDATES-IN-BUFFER.
- ALLOW-NEST: Allow nesting this `helm-comp-read' in a helm session.
See `helm'.
- MULTILINE: See multiline in `helm-source'.
- COERCE: See coerce in `helm-source'.
- GROUP: See group in `helm-source'.
Any prefix args passed during `helm-comp-read' invocation will be recorded
in `helm-current-prefix-arg', otherwise if prefix args were given before
`helm-comp-read' invocation, the value of `current-prefix-arg' will be used.
That means you can pass prefix args before or after calling a command
that use `helm-comp-read'. See `helm-M-x' for example."
(when (get-buffer helm-action-buffer)
(kill-buffer helm-action-buffer))
(let ((action-fn `(("Sole action (Identity)"
. (lambda (candidate)
(if ,marked-candidates
(helm-marked-candidates)
(identity candidate)))))))
(let* ((minibuffer-completion-predicate test)
(minibuffer-completion-table collection)
(helm-read-file-name-mode-line-string
(replace-regexp-in-string "helm-maybe-exit-minibuffer"
"helm-confirm-and-exit-minibuffer"
helm-read-file-name-mode-line-string))
(get-candidates
(lambda ()
(let ((cands (helm-comp-read-get-candidates
;; If `helm-pattern' is passed as INPUT
;; and :alistp is nil INPUT is passed to
;; `all-completions' which defeat helm
;; matching functions (multi match, fuzzy
;; etc...) issue #2134.
collection test sort alistp
(if (and match-dynamic (null candidates-in-buffer))
helm-pattern ""))))
(helm-cr-default default cands))))
(history-get-candidates
(lambda ()
(let ((cands (helm-comp-read-get-candidates
history test nil alistp)))
(when cands
(delete "" (helm-cr-default default cands))))))
(src-hist (helm-build-sync-source (format "%s History" name)
:candidates history-get-candidates
:fuzzy-match fuzzy
:multiline multiline
:match-part match-part
:filtered-candidate-transformer
(append '((lambda (candidates sources)
(cl-loop for i in candidates
;; Input is added to history in completing-read's
;; and may be regexp-quoted, so unquote it
;; but check if cand is a string (it may be at this stage
;; a symbol or nil) Issue #1553.
when (stringp i)
collect (replace-regexp-in-string "\\s\\" "" i))))
(and hist-fc-transformer (helm-mklist hist-fc-transformer)))
:persistent-action persistent-action
:persistent-help persistent-help
:keymap keymap
:must-match must-match
:group group
:coerce coerce
:mode-line mode-line
:help-message help-message
:action action-fn))
(src (helm-build-sync-source name
:candidates get-candidates
:match-part match-part
:multiline multiline
:header-name header-name
:filtered-candidate-transformer
(let ((transformers (helm-mklist fc-transformer)))
(append transformers
(unless (member 'helm-cr-default-transformer transformers)
'(helm-cr-default-transformer))))
:requires-pattern requires-pattern
:persistent-action persistent-action
:persistent-help persistent-help
:fuzzy-match fuzzy
:keymap keymap
:must-match must-match
:group group
:coerce coerce
:mode-line mode-line
:match-dynamic match-dynamic
:help-message help-message
:action action-fn
:volatile volatile))
(src-1 (helm-build-in-buffer-source name
:data get-candidates
:match-part match-part
:multiline multiline
:header-name header-name
:filtered-candidate-transformer
(append (helm-mklist fc-transformer)
'(helm-cr-default-transformer))
:requires-pattern requires-pattern
:persistent-action persistent-action
:fuzzy-match fuzzy
:keymap keymap
:must-match must-match
:group group
:coerce coerce
:persistent-help persistent-help
:mode-line mode-line
:help-message help-message
:action action-fn))
(src-list (list src-hist
(if candidates-in-buffer
src-1 src)))
(helm-execute-action-at-once-if-one exec-when-only-one)
(helm-quit-if-no-candidate quit-when-no-cand)
result)
(when nomark
(setq src-list (cl-loop for src in src-list
collect (cons '(nomark) src))))
(when reverse-history (setq src-list (nreverse src-list)))
(add-hook 'helm-after-update-hook 'helm-comp-read--move-to-first-real-candidate)
(unwind-protect
(setq result (helm
:sources src-list
:input initial-input
:default default
:preselect preselect
:prompt prompt
:resume 'noresume
:keymap keymap ;; Needed with empty collection.
:allow-nest allow-nest
:candidate-number-limit candidate-number-limit
:case-fold-search case-fold
:history (and (symbolp input-history) input-history)
:buffer buffer))
(remove-hook 'helm-after-update-hook 'helm-comp-read--move-to-first-real-candidate))
;; Avoid adding an incomplete input to history.
(when (and result history del-input)
(cond ((and (symbolp history) ; History is a symbol.
(not (symbolp (symbol-value history)))) ; Fix Issue #324.
;; Be sure history is not a symbol with a nil value.
(helm-aif (symbol-value history) (setcar it result)))
((consp history) ; A list with a non--nil value.
(setcar history result))
(t ; Possibly a symbol with a nil value.
(set history (list result)))))
(or result (helm-mode--keyboard-quit)))))
;; Generic completing-read
;;
;; Support also function as collection.
;; e.g M-x man is supported.
;; Support hash-table and vectors as collection.
;; NOTE:
;; Some crap emacs functions may not be supported
;; like ffap-alternate-file (bad use of completing-read)
;; and maybe others.
;; Provide a mode `helm-mode' which turn on
;; helm in all `completing-read' and `read-file-name' in Emacs.
;;
(defvar helm-completion-mode-string " Helm")
(defvar helm-completion-mode-quit-message
"Helm completion disabled")
(defvar helm-completion-mode-start-message
"Helm completion enabled")
;;; Specialized handlers
;;
;;
(defun helm-completing-read-symbols
(prompt _collection test _require-match init
hist default _inherit-input-method name buffer)
"Specialized function for fast symbols completion in `helm-mode'."
(require 'helm-elisp)
(or
(helm
:sources (helm-build-in-buffer-source name
:init (lambda ()
(helm-apropos-init (lambda (x)
(and (funcall test x)
(not (keywordp x))))
(or (car-safe default) default)))
:filtered-candidate-transformer 'helm-apropos-default-sort-fn
:help-message #'helm-comp-read-help-message
:fuzzy-match helm-mode-fuzzy-match
:persistent-action
(lambda (candidate)
(helm-lisp-completion-persistent-action
candidate name))
:persistent-help (helm-lisp-completion-persistent-help))
:prompt prompt
:buffer buffer
:input init
:history hist
:resume 'noresume
:default (or default ""))
(helm-mode--keyboard-quit)))
;;; Generic completing read
;;
;;
(defun helm-completing-read-default-1
(prompt collection test require-match
init hist default _inherit-input-method
name buffer &optional cands-in-buffer exec-when-only-one)
"Call `helm-comp-read' with same args as `completing-read'.
Extra optional arg CANDS-IN-BUFFER means use `candidates-in-buffer'
method which is faster.
It should be used when candidate list doesn't need to be rebuilt dynamically."
(let ((history (or (car-safe hist) hist))
(initial-input (helm-aif (pcase init
((pred (stringp)) init)
;; INIT is a cons cell.
(`(,l . ,_ll) l))
it)))
(helm-comp-read
prompt collection
:test test
:history history
:reverse-history helm-mode-reverse-history
:input-history history
:must-match require-match
:alistp nil
:help-message #'helm-comp-read-help-message
:name name
:requires-pattern (if (and (stringp default)
(string= default "")
(or (eq require-match 'confirm)
(eq require-match
'confirm-after-completion)))
1 0)
:nomark (null helm-comp-read-use-marked)
:candidates-in-buffer cands-in-buffer
:exec-when-only-one exec-when-only-one
:fuzzy helm-mode-fuzzy-match
:buffer buffer
;; If DEF is not provided, fallback to empty string
;; to avoid `thing-at-point' to be appended on top of list
:default (or default "")
;; Fail with special characters (e.g in gnus "nnimap+gmail:")
;; if regexp-quote is not used.
;; when init is added to history, it will be unquoted by
;; helm-comp-read.
:initial-input initial-input)))
(defun helm-completing-read-default-2
(prompt collection predicate require-match
init hist default _inherit-input-method
name buffer &optional _cands-in-buffer exec-when-only-one)
"Call `helm-comp-read' with same args as `completing-read'.
This handler uses dynamic matching which allows honouring `completion-styles'."
(let* ((history (or (car-safe hist) hist))
(input (pcase init
((pred (stringp)) init)
;; INIT is a cons cell.
(`(,l . ,_ll) l)))
(completion-flex-nospace t)
(completion-styles
(helm--prepare-completion-styles 'nomode))
(metadata (or (completion-metadata (or input "") collection predicate)
'(metadata)))
(afun (or (plist-get completion-extra-properties :annotation-function)
(completion-metadata-get metadata 'annotation-function)))
(file-comp-p (eq (completion-metadata-get metadata 'category) 'file))
(compfn (lambda (str _predicate _action)
(let* ((completion-ignore-case (helm-set-case-fold-search))
(comps
(completion-all-completions
str ; This is helm-pattern
collection
predicate
(length str)
metadata))
(last-data (last comps))
;; Helm syle sort fn is added to
;; metadata only in emacs-27, so in
;; emacs-26 use helm-generic-sort-fn
;; which handle both helm and
;; helm-flex styles. When
;; helm-completion-style is helm or
;; helm-fuzzy, sorting will be done
;; later in FCT.
(sort-fn
(and (eq helm-completion-style 'emacs)
(or
;; Emacs-27
(completion-metadata-get
metadata 'display-sort-function)
;; Emacs-26
(lambda (candidates)
(sort candidates #'helm-generic-sort-fn)))))
all)
(when (cdr last-data)
;; Remove the last element of
;; comps by side-effect.
(setcdr last-data nil))
(setq helm-completion--sorting-done (and sort-fn t))
(setq all (copy-sequence comps))
;; Default is passed here only with helm
;; h-c-styles, otherwise with emacs style it is
;; passed with the :default arg of helm-comp-read
;; and computed in its get-candidates function.
(append (and default
(memq helm-completion-style '(helm helm-fuzzy))
(list default))
(helm-completion-in-region--initial-filter
(if (and sort-fn (> (length str) 0))
(funcall sort-fn all)
all)
afun file-comp-p)))))
(data (if (memq helm-completion-style '(helm helm-fuzzy))
(funcall compfn (or input "") nil nil)
compfn))
(helm-completion-in-region-default-sort-fn
(lambda (candidates _source)
(if (or helm-completion--sorting-done
(string= helm-pattern ""))
candidates
(sort candidates 'helm-generic-sort-fn)))))
(unwind-protect
(helm-comp-read
;; Completion-at-point and friends have no prompt.
prompt
data
:name name
:initial-input input
:buffer buffer
:history history
:nomark (null helm-comp-read-use-marked)
:reverse-history helm-mode-reverse-history
;; In helm h-c-styles default is passed directly in
;; candidates.
:default (and (eq helm-completion-style 'emacs) default)
:fc-transformer
;; Ensure sort fn is at the end.
(append '(helm-cr-default-transformer)
(and helm-completion-in-region-default-sort-fn
(list helm-completion-in-region-default-sort-fn)))
:match-dynamic (eq helm-completion-style 'emacs)