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helm-mode.el
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;;; helm-mode.el --- Enable helm completion everywhere. -*- lexical-binding: t -*-
;; Copyright (C) 2012 ~ 2018 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 'cl-lib)
(require 'helm)
(require 'helm-lib)
(require 'helm-files)
(defvar crm-separator)
(defgroup helm-mode nil
"Enable helm completion."
:group 'helm)
(defcustom helm-completing-read-handlers-alist
'((describe-function . helm-completing-read-symbols)
(describe-variable . helm-completing-read-symbols)
(describe-symbol . helm-completing-read-symbols)
(debug-on-entry . helm-completing-read-symbols)
(find-function . helm-completing-read-symbols)
(disassemble . helm-completing-read-symbols)
(trace-function . helm-completing-read-symbols)
(trace-function-foreground . helm-completing-read-symbols)
(trace-function-background . helm-completing-read-symbols)
(find-tag . helm-completing-read-default-find-tag)
(org-capture . helm-org-completing-read-tags)
(org-set-tags . helm-org-completing-read-tags)
(ffap-alternate-file . nil)
(tmm-menubar . nil)
(find-file . nil)
(find-file-at-point . helm-completing-read-sync-default-handler)
(ffap . helm-completing-read-sync-default-handler)
(execute-extended-command . nil))
"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 allow 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 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 same args as `completing-read', this allow 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'
returns 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' complete against symbols and
second `completing-read' should handle only buffer,
your specialized function should handle the both.
If the value of an entry is nil completion will fall back to
emacs vanilla behavior.
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 enable support for `completing-read-multiple' and `completion-at-point'
when non--nil."
:group 'helm-mode
:type 'boolean)
(defcustom helm-mode-reverse-history t
"Display history source after current source in `helm-mode' handled commands."
: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-completion-in-region-fuzzy-match nil
"Whether `helm-completion-in-region' use fuzzy matching or not.
Affect among others `completion-at-point', `completing-read-multiple'."
: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.
It will be used only when `helm-completion-in-region-fuzzy-match' is
nil otherwise fuzzy use its own sort function."
:group 'helm-mode
:type 'function)
(defcustom helm-mode-fuzzy-match nil
"Enable fuzzy matching in `helm-mode' globally.
Note that this will slow down completion and modify sorting
which is unwanted in many places.
This affect only the functions with completing-read helmized by helm-mode.
To fuzzy match `completion-at-point' and friends see
`helm-completion-in-region-fuzzy-match'."
:group 'helm-mode
:type 'boolean)
(defcustom 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'."
:group 'helm-mode
:type '(repeat (choice symbol)))
(defcustom helm-completing-read-dynamic-complete nil
"Use dynamic completion in `completing-read' when non-nil.
The default is to not use this because it is most of the time unneeded
in `completing-read' and thus it is much more slower.
If you feel one emacs function need this you have better time to tell
`helm-mode' to use a dynamic completion for this function only by using
`helm-completing-read-handlers-alist' with an entry like this:
(my-function . helm-completing-read-sync-default-handler)
So you should not change the default setting of this variable unless you
know what you are doing."
:group 'helm-mode
:type 'boolean)
(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'.")
;;; helm-comp-read
;;
;;
(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 ""))
minibuffer-completing-file-name)
(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 "")
(helm-cr--pattern-in-candidates-p candidates))
(setq candidates (append (list
;; Unquote helm-pattern
;; when it is added
;; as candidate.
(replace-regexp-in-string
"\\s\\" "" 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 (equal c pat) 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)
(when (string= (get-text-property 0 'display it) "[?]")
(helm-next-line))))
(defun helm-cr-default (default cands)
(delq nil
(cond ((and (stringp default) (not (string= default "")))
(cons default (delete default cands)))
((consp default)
(append (cl-loop for d in default
;; Don't convert
;; nil to "nil" (i.e the string)
;; it will be delq'ed on top.
collect (if (null d) d (helm-stringify d)))
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
exec-when-only-one
quit-when-no-cand
(volatile t)
sort
fc-transformer
hist-fc-transformer
marked-candidates
nomark
(alistp t)
(candidate-number-limit helm-candidate-number-limit)
multiline
allow-nest)
"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 ineficient.
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'.
- ALLOW-NEST: Allow nesting this `helm-comp-read' in a helm session.
See `helm'.
- MULTILINE: See multiline 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's mean 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)))))))
;; Assume completion have been already required,
;; so always use 'confirm.
(when (eq must-match 'confirm-after-completion)
(setq must-match 'confirm))
(let* ((minibuffer-completion-confirm must-match)
(must-match-map (when must-match
(let ((map (make-sparse-keymap)))
(define-key map (kbd "RET")
'helm-confirm-and-exit-minibuffer)
map)))
(loc-map (if must-match-map
(make-composed-keymap
must-match-map (or keymap helm-map))
(or keymap helm-map)))
(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
collection test sort alistp
;; This should not be needed as
;; `helm-pattern' is not yet computed when
;; calling this from :init when
;; candidates-in-buffer is in use.
(if 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 loc-map
: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
(append (helm-mklist fc-transformer)
'(helm-cr-default-transformer))
:requires-pattern requires-pattern
:persistent-action persistent-action
:persistent-help persistent-help
:fuzzy-match fuzzy
:keymap loc-map
:mode-line mode-line
: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 loc-map
:persistent-help persistent-help
:mode-line mode-line
:help-message help-message
:action action-fn))
(src-list (list src-hist
(cons (cons 'must-match must-match)
(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
: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 mean use `candidates-in-buffer'
method which is faster.
It should be used when candidate list don't need to rebuild 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))
(if minibuffer-completing-file-name it
(regexp-quote 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)
: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-find-tag
(prompt collection test require-match
init hist default inherit-input-method
name buffer)
"Specialized `helm-mode' handler for `find-tag'."
;; Some commands like find-tag may use `read-file-name' from inside
;; the calculation of collection. in this case it clash with
;; candidates-in-buffer that reuse precedent data (files) which is wrong.
;; So (re)calculate collection outside of main helm-session.
(let* ((cands (helm-comp-read-get-candidates
collection test nil nil)))
(helm-completing-read-default-1 prompt cands test require-match
init hist default inherit-input-method
name buffer t)))
(defun helm-completing-read-sync-default-handler
(prompt collection test require-match
init hist default inherit-input-method
name buffer)
"`helm-mode' handler using sync source as backend."
(helm-completing-read-default-1 prompt collection test require-match
init hist default inherit-input-method
name buffer))
(defun helm-completing-read-default-handler
(prompt collection test require-match
init hist default inherit-input-method
name buffer)
"Default `helm-mode' handler for all `completing-read'."
(helm-completing-read-default-1 prompt collection test require-match
init hist default inherit-input-method
name buffer
(null helm-completing-read-dynamic-complete)))
(cl-defun helm--completing-read-default
(prompt collection &optional
predicate require-match
initial-input hist def
inherit-input-method)
"An helm replacement of `completing-read'.
This function should be used only as a `completing-read-function'.
Don't use it directly, use instead `helm-comp-read' in your programs.
See documentation of `completing-read' and `all-completions' for details."
(let* ((current-command (or (helm-this-command) this-command))
(str-command (helm-symbol-name current-command))
(buf-name (format "*helm-mode-%s*" str-command))
(entry (assq current-command
helm-completing-read-handlers-alist))
(def-com (cdr-safe entry))
(str-defcom (and def-com (helm-symbol-name def-com)))
(def-args (list prompt collection predicate require-match
initial-input hist def inherit-input-method))
;; Append the two extra args needed to set the buffer and source name
;; in helm specialized functions.
(any-args (append def-args (list str-command buf-name)))
helm-completion-mode-start-message ; Be quiet
helm-completion-mode-quit-message
;; Be sure this pesty *completion* buffer doesn't popup.
;; Note: `minibuffer-with-setup-hook' may setup a lambda
;; calling `minibuffer-completion-help' or other minibuffer
;; functions we DONT WANT here, in these cases removing the hook
;; (a symbol) have no effect. Issue #448.
;; Because `minibuffer-completion-table' and
;; `minibuffer-completion-predicate' are not bound
;; anymore here, these functions should have no effect now,
;; except in some rare cases like in `woman-file-name',
;; so remove all incompatible functions
;; from `minibuffer-setup-hook' (Issue #1205, #1240).
;; otherwise helm have not the time to close its initial session.
(minibuffer-setup-hook
(cl-loop for h in minibuffer-setup-hook
unless (or (consp h) ; a lambda.
(byte-code-function-p h)
(memq h helm-mode-minibuffer-setup-hook-black-list))
collect h))
;; Disable hack that could be used before `completing-read'.
;; i.e (push ?\t unread-command-events).
unread-command-events)
(when (eq def-com 'ido) (setq def-com 'ido-completing-read))
(unless (or (not entry) def-com)
;; An entry in *read-handlers-alist exists but have
;; a nil value, so we exit from here, disable `helm-mode'
;; and run the command again with it original behavior.
;; `helm-mode' will be restored on exit.
(cl-return-from helm--completing-read-default
(unwind-protect
(progn
(helm-mode -1)
(apply completing-read-function def-args))
(helm-mode 1))))
;; If we use now `completing-read' we MUST turn off `helm-mode'
;; to avoid infinite recursion and CRASH. It will be reenabled on exit.
(when (or (eq def-com 'completing-read)
;; All specialized functions are prefixed by "helm"
(and (stringp str-defcom)
(not (string-match "^helm" str-defcom))))
(helm-mode -1))
(unwind-protect
(cond (;; An helm specialized function exists, run it.
(and def-com helm-mode)
(apply def-com any-args))
(;; Try to handle `ido-completing-read' everywhere.
(and def-com (eq def-com 'ido-completing-read))
(setcar (memq collection def-args)
(all-completions "" collection predicate))
(apply def-com def-args))
(;; User set explicitely `completing-read' or something similar
;; in *read-handlers-alist, use this with exactly the same
;; args as in `completing-read'.
;; If we are here `helm-mode' is now disabled.
def-com
(apply def-com def-args))
(;; Use by default a cands-in-buffer handler which
;; should work everywhere, it is much faster.
t
(helm-completing-read-default-handler
prompt collection predicate require-match
initial-input hist def inherit-input-method
str-command buf-name)))
(helm-mode 1)
;; When exiting minibuffer, `this-command' is set to
;; `helm-exit-minibuffer', which is unwanted when starting
;; on another `completing-read', so restore `this-command' to
;; initial value when exiting.
(setq this-command current-command))))
;;; Generic read-file-name
;;
;;
;;;###autoload
(cl-defun helm-read-file-name
(prompt
&key
(name "Read File Name")
(initial-input default-directory)
(buffer "*Helm file completions*")
test
(case-fold helm-file-name-case-fold-search)
preselect
history
must-match
(fuzzy t)
default
marked-candidates
(candidate-number-limit helm-ff-candidate-number-limit)
nomark
(alistp t)
(persistent-action-if 'helm-find-files-persistent-action-if)
(persistent-help "Hit1 Expand Candidate, Hit2 or (C-u) Find file")
(mode-line helm-read-file-name-mode-line-string))
"Read a file name with helm completion.
It is helm `read-file-name' emulation.
Argument PROMPT is the default prompt to use.
Keys description:
- NAME: Source name, default to \"Read File Name\".
- INITIAL-INPUT: Where to start read file name, default to `default-directory'.
- BUFFER: `helm-buffer' name default to \"*Helm Completions*\".
- TEST: A predicate called with one arg 'candidate'.
- CASE-FOLD: Same as `helm-case-fold-search'.
- PRESELECT: helm preselection.
- HISTORY: Display HISTORY in a special source.
- MUST-MATCH: Can be 'confirm, nil, or t.
- FUZZY: Enable fuzzy matching when non-nil (Enabled by default).
- MARKED-CANDIDATES: When non--nil return a list of marked candidates.
- NOMARK: When non--nil don't allow marking candidates.
- ALISTP: Don't use `all-completions' in history (take effect only on history).
- PERSISTENT-ACTION-IF: a persistent if action function.
- PERSISTENT-HELP: persistent help message.
- MODE-LINE: A mode line message, default is `helm-read-file-name-mode-line-string'."
(require 'tramp)
(when (get-buffer helm-action-buffer)
(kill-buffer helm-action-buffer))
;; Assume completion have been already required,
;; so always use 'confirm.
(when (eq must-match 'confirm-after-completion)
(setq must-match 'confirm))
(mapc (lambda (hook)
(add-hook 'helm-after-update-hook hook))
'(helm-ff-move-to-first-real-candidate
helm-ff-update-when-only-one-matched
helm-ff-auto-expand-to-home-or-root))
(let* ((action-fn `(("Sole action (Identity)"
. (lambda (candidate)
(if ,marked-candidates
(helm-marked-candidates :with-wildcard t)
(identity candidate))))))
;; Be sure we don't erase the underlying minibuffer if some.
(helm-ff-auto-update-initial-value
(and helm-ff-auto-update-initial-value
(not (minibuffer-window-active-p (minibuffer-window)))))
helm-follow-mode-persistent
(helm-ff-fuzzy-matching
(and fuzzy
(not (memq helm-mm-matching-method '(multi1 multi3p)))))
(hist (and history (helm-comp-read-get-candidates
history nil nil alistp)))
(minibuffer-completion-confirm must-match)
(must-match-map (when must-match
(let ((map (make-sparse-keymap)))
(define-key map (kbd "RET")
(let ((fn (lookup-key helm-read-file-map (kbd "RET"))))
(if (eq fn 'helm-ff-RET)
#'helm-ff-RET-must-match
#'helm-confirm-and-exit-minibuffer)))
map)))
(cmap (if must-match-map
(make-composed-keymap
must-match-map helm-read-file-map)
helm-read-file-map))
(minibuffer-completion-predicate test)
(minibuffer-completing-file-name t)
(helm--completing-file-name t)
(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))
(src-list
(list
;; History source.
(helm-build-sync-source (format "%s History" name)
:header-name (lambda (name)