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helm-buffers.el
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;;; helm-buffers.el --- helm support for buffers. -*- lexical-binding: t -*-
;; Copyright (C) 2012 ~ 2025 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 'cl-lib)
(require 'helm)
(require 'helm-types)
(require 'helm-utils)
(require 'helm-grep)
(require 'helm-regexp)
(require 'helm-help)
(require 'helm-occur)
(require 'helm-x-icons)
(declare-function helm-comp-read "helm-mode")
(declare-function helm-browse-project "helm-files")
(declare-function helm-ff-switch-to-shell "helm-files")
(defvar dired-buffers)
(defvar org-directory)
(defvar helm-ff-default-directory)
(defvar major-mode-remap-alist)
(defgroup helm-buffers nil
"Buffers related Applications and libraries for Helm."
:group 'helm)
(defcustom helm-boring-buffer-regexp-list
'("\\` " "\\`\\*helm" "\\`\\*Echo Area" "\\`\\*Minibuf")
"The regexp list that match boring buffers.
Buffer candidates matching these regular expression will be
filtered from the list of candidates if the
`helm-skip-boring-buffers' candidate transformer is used."
:type '(repeat (choice regexp)))
(defcustom helm-white-buffer-regexp-list nil
"The regexp list of not boring buffers.
These buffers will be displayed even if they match one of
`helm-boring-buffer-regexp-list'."
:type '(repeat (choice regexp)))
(defcustom helm-buffers-favorite-modes '(lisp-interaction-mode
emacs-lisp-mode
text-mode
org-mode)
"List of preferred mode to open new buffers with."
:type '(repeat (choice function)))
(defcustom helm-buffer-max-length 20
"Max length of buffer names before truncate.
When disabled (nil) use the longest `buffer-name' length found."
:type '(choice (const :tag "Disabled" nil)
(integer :tag "Length before truncate")))
(defcustom helm-buffer-details-flag t
"Always show details in buffer list when non-nil."
:type 'boolean)
(defcustom helm-buffers-fuzzy-matching nil
"Fuzzy matching buffer names when non-nil.
Only buffer names are fuzzy matched when this is enabled,
`major-mode' matching is not affected by this."
:type 'boolean)
(defcustom helm-buffer-skip-remote-checking nil
"Ignore checking for `file-exists-p' on remote files."
:type 'boolean)
(defcustom helm-buffers-truncate-lines t
"Truncate lines in `helm-buffers-list' when non-nil."
:type 'boolean)
(defcustom helm-buffers-left-margin-width helm-left-margin-width
"`left-margin-width' value for `helm-mini' and `helm-buffers-list'."
:type 'integer)
(defcustom helm-mini-default-sources '(helm-source-buffers-list
helm-source-recentf
helm-source-buffer-not-found)
"Default sources list used in `helm-mini'.
When adding a source here it is up to you to ensure the library
of this source is accessible and properly loaded."
:type '(repeat (choice symbol)))
(defcustom helm-buffers-end-truncated-string
;; `truncate-string-ellipsis', the function is not available in 27.1
;; See issue#2673.
(if (char-displayable-p ?…) "…" "...")
"The string to display at end of truncated buffer names."
:type 'string)
(defcustom helm-buffers-column-separator " "
"Separator for columns in buffer listing."
:type 'string)
(defcustom helm-buffer--pretty-names '((dired-mode . "Dired")
(lisp-interaction-mode . "Lisp Inter"))
"An alist specifying pretty names for modes.
Most of the time buffer's `mode-name' is a string so no need to
add it here as there is no need to compute it, but sometimes it
may be a mode-line specification which may be costly to compute,
in this case add here the pretty name as a string to avoid this
costly computation. Also if some pretty names are too long you
can add your own abbreviation here."
:type '(alist :key-type symbol :value-type string))
(defcustom helm-buffers-maybe-switch-to-tab nil
"Switch to buffer in its tab when non nil.
Setting this change `tab-bar-tab-name-function' to `tab-bar-tab-name-all'.
Do not use `setq' to set this variable.
This variable takes effect only when `tab-bar-mode' is available (emacs-27.1+)."
:type 'boolean
:set (lambda (var val)
;; We should be able to retrieve all buffers assigned to a tab whatever
;; the value used for `tab-bar-tab-name-function', unfortunately this
;; is not the case, it seems the alist contains the buffer names only
;; when `tab-bar-tab-name-all' is used and set globally. Then when the
;; mode-line/header-line is rebuilded some code (probably C code in
;; `force-mode-line-update' or elsewhare) changes the alist so just
;; let-binding `tab-bar-tab-name-function' is not enough. This is
;; reproductible when we have more than one window visible and we turn
;; on `tab-bar-mode', the alist is showing only the first buffer of
;; window-list omitting the others, however when starting with only one
;; window, calling `tab-bar-mode' and splitting window afterward the
;; alist is updated. Looks it is a bug or a limitation of
;; `tab-bar-mode'.
(set var val)
(if val
(customize-set-variable
'tab-bar-tab-name-function
#'tab-bar-tab-name-all)
(let* ((sym 'tab-bar-tab-name-function)
(standard-value (eval (car (get sym 'standard-value)) t)))
(unless (equal standard-value (symbol-value sym))
(set sym standard-value))))))
(defcustom helm-buffer-list-reorder-fn #'helm-buffers-reorder-buffer-list
"A function in charge of ordering the initial buffer list.
It takes two arguments VISIBLES buffers and OTHERS buffers.
Arg VISIBLES handles the buffers visibles in this frame.
Arg OTHERS handles all the other buffers.
You can write a function that reorder VISIBLES and OTHERS as you
want.
Default function returns OTHERS buffers on top and VISIBLES
buffer at the end. See `helm-buffers-reorder-buffer-list'."
:type 'function)
(defcustom helm-buffers-sort-fn helm-fuzzy-sort-fn
"The sort function to use in `helm-buffers-list'.
Default to `helm-fuzzy-sort-fn' you can use
`helm-fuzzy-matching-sort-fn-preserve-ties-order' as alternative if
you want to keep the recentest order when narrowing candidates."
:type 'function)
(defcustom helm-buffers-show-icons nil
"Prefix buffer names with an icon when non nil.
Don't use `setq' to set this."
:type 'boolean
:set (lambda (var val)
(if (require helm-x-icons-provider nil t)
(set var val)
(set var nil))))
;;; Faces
;;
;;
(defgroup helm-buffers-faces nil
"Customize the appearance of helm-buffers."
:prefix "helm-"
:group 'helm-buffers
:group 'helm-faces)
(defface helm-buffer-saved-out
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "red" :background "black"))
"Face used for buffer files modified outside of emacs."
:group 'helm-buffers-faces)
(defface helm-buffer-not-saved
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "Indianred2"))
"Face used for buffer files not already saved on disk."
:group 'helm-buffers-faces)
(defface helm-buffer-modified
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:inherit font-lock-comment-face))
"Face used for modified buffers."
:group 'helm-buffers-faces)
(defface helm-no-file-buffer-modified
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "orange" :background "black"))
"Face used for modified buffers."
:group 'helm-buffers-faces)
(defface helm-indirect-buffer
`((t :foreground "DimGray" :background "black"))
"Face used for indirect buffers."
:group 'helm-buffers-faces)
(defface helm-buffer-size
`((((background dark))
,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "RosyBrown")
(((background light))
,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "SlateGray"))
"Face used for buffer size."
:group 'helm-buffers-faces)
(defface helm-buffer-process
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "Sienna3"))
"Face used for process status in buffer."
:group 'helm-buffers-faces)
(defface helm-buffer-directory
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "DarkRed" :background "LightGray"))
"Face used for directories in `helm-buffers-list'."
:group 'helm-buffers-faces)
(defface helm-buffer-file
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:inherit font-lock-builtin-face))
"Face for buffer file names in `helm-buffers-list'."
:group 'helm-buffers-faces)
(defface helm-buffer-archive
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:foreground "Gold"))
"Face for archive file names in `helm-buffers-list'."
:group 'helm-buffers-faces)
(defface helm-non-file-buffer
`((t ,@(and (>= emacs-major-version 27) '(:extend t))
:inherit italic))
"Face used for non-file buffers in `helm-buffers-list'."
:group 'helm-buffers-faces)
(defvar helm-buffers-tick-counter nil
"Allows recording local changes to a non-file buffer.
Typical usage of this var is for modes that want to see if their
buffers have changed since last visit.
Such programs may want to record tick counter after visiting
their buffers like this:
(setq helm-buffers-tick-counter (buffer-modified-tick))
See bug#1917.
Note that this variable is buffer-local.")
(make-variable-buffer-local 'helm-buffers-tick-counter)
;;; Buffers keymap
;;
(defvar helm-buffer-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map helm-map)
;; No need to have separate command for grep and zgrep
;; as we don't use recursivity for buffers.
;; So use zgrep for both as it is capable to handle non--compressed files.
(define-key map (kbd "M-g s") #'helm-buffer-run-zgrep)
(define-key map (kbd "C-s") #'helm-buffers-run-occur)
(define-key map (kbd "C-x C-d") #'helm-buffers-run-browse-project)
(define-key map (kbd "C-c o") #'helm-buffer-switch-other-window)
(define-key map (kbd "C-c C-o") #'helm-buffer-switch-other-frame)
(define-key map (kbd "M-g M-g") #'helm-buffer-run-goto-line)
(define-key map (kbd "C-c =") #'helm-buffer-run-ediff)
(define-key map (kbd "M-=") #'helm-buffer-run-ediff-merge)
(define-key map (kbd "C-=") #'helm-buffer-diff-persistent)
(define-key map (kbd "M-G") #'helm-buffer-revert-persistent)
(define-key map (kbd "C-c d") #'helm-buffer-run-kill-persistent)
(define-key map (kbd "M-D") #'helm-buffer-run-kill-buffers)
(define-key map (kbd "C-x C-s") #'helm-buffer-save-persistent)
(define-key map (kbd "C-x s") #'helm-buffer-run-save-some-buffers)
(define-key map (kbd "C-M-%") #'helm-buffer-run-query-replace-regexp)
(define-key map (kbd "M-%") #'helm-buffer-run-query-replace)
(define-key map (kbd "M-R") #'helm-buffer-run-rename-buffer)
(define-key map (kbd "M-e") #'helm-buffer-run-switch-to-shell)
(define-key map (kbd "C-]") #'helm-toggle-buffers-details)
(define-key map (kbd "C-c a") #'helm-buffers-toggle-show-hidden-buffers)
(define-key map (kbd "C-M-SPC") #'helm-buffers-mark-similar-buffers)
(when (fboundp 'tab-bar-mode)
(define-key map (kbd "C-c C-t") #'helm-buffers-switch-to-buffer-new-tab))
map)
"Keymap for buffer sources in helm.")
(defvar helm-buffer-max-len-mode nil)
(defvar helm-buffers-in-project-p nil)
(defvar helm-source-buffers-list nil)
(defun helm-buffers-list--init ()
(require 'dired)
;; Bug#51 Create the list before `helm-buffer' creation.
;; We were using a global cache in the past and 'candidates was
;; bound to this cache, this was a problem when using more than one
;; source with a different 'buffer-list fn as the same cache was
;; reused in each source (Bug#1907), now 'candidates attr is set
;; directly so that each list of candidates is local to source.
(helm-set-attr 'candidates (funcall (helm-get-attr 'buffer-list)))
(let ((result (cl-loop with allbufs = (memq 'helm-shadow-boring-buffers
(helm-get-attr
'filtered-candidate-transformer
helm-source-buffers-list))
for b in (if allbufs
(helm-get-attr 'candidates)
(helm-skip-boring-buffers
(helm-get-attr 'candidates)
helm-source-buffers-list))
maximize (length b) into len-buf
maximize (length (helm-buffer--format-mode-name b))
into len-mode
finally return (cons len-buf len-mode))))
(unless (default-value 'helm-buffer-max-length)
(helm-set-local-variable 'helm-buffer-max-length (car result)))
(unless (default-value 'helm-buffer-max-len-mode)
(helm-set-local-variable 'helm-buffer-max-len-mode (cdr result)))))
(defclass helm-source-buffers (helm-source-sync helm-type-buffer)
((buffer-list
:initarg :buffer-list
:initform #'helm-buffer-list
:custom function
:documentation
" A function with no arguments to create buffer list.")
(init :initform 'helm-buffers-list--init)
(multimatch :initform nil)
(match :initform 'helm-buffers-match-function)
(persistent-action :initform 'helm-buffers-list-persistent-action)
(keymap :initform 'helm-buffer-map)
(find-file-target :initform #'helm-buffers-quit-and-find-file-fn)
(migemo :initform 'nomultimatch)
(volatile :initform t)
(nohighlight :initform t)
(resume :initform (lambda () (setq helm-buffers-in-project-p nil)))
(help-message :initform 'helm-buffer-help-message)))
(cl-defun helm-buffers-create-new-buffer-1 (candidate &optional (display-func 'switch-to-buffer))
(let ((mjm (or (and helm-current-prefix-arg
(intern-soft (helm-comp-read
"Major-mode: "
helm-buffers-favorite-modes)))
(cl-loop for (r . m) in auto-mode-alist
when (string-match r candidate)
return m)))
(buffer (get-buffer-create candidate)))
(helm-aif (and (boundp 'major-mode-remap-alist)
(cdr (assq mjm major-mode-remap-alist)))
(setq mjm it))
(if mjm
(with-current-buffer buffer (funcall mjm))
(set-buffer-major-mode buffer))
(funcall display-func buffer)))
(defun helm-buffers-create-new-buffer (candidate)
(helm-buffers-create-new-buffer-1 candidate))
(defun helm-buffers-create-new-buffer-ow (candidate)
(helm-buffers-create-new-buffer-1 candidate 'switch-to-buffer-other-window))
(helm-make-command-from-action helm-buffers-not-found-run-switch-ow
"Run create new buffer other window action from keymap."
'helm-buffers-create-new-buffer-ow)
(defun helm-buffers-create-new-buffer-of (candidate)
(helm-buffers-create-new-buffer-1 candidate 'switch-to-buffer-other-frame))
(helm-make-command-from-action helm-buffers-not-found-run-switch-of
"Run create new buffer other frame action from keymap."
'helm-buffers-create-new-buffer-of)
(defvar helm-buffer-not-found-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map helm-map)
(define-key map (kbd "C-c o") #'helm-buffers-not-found-run-switch-ow)
(define-key map (kbd "C-c C-o") #'helm-buffers-not-found-run-switch-of)
map)
"Keymap for `helm-source-buffer-not-found' source.")
(defvar helm-source-buffer-not-found
(helm-build-dummy-source
"Create buffer"
:action (helm-make-actions
"Create buffer (C-u choose mode)"
#'helm-buffers-create-new-buffer
"Create buffer other window (C-u choose mode)"
#'helm-buffers-create-new-buffer-ow
"Create buffer other frame (C-u choose mode)"
#'helm-buffers-create-new-buffer-of)
:keymap helm-buffer-not-found-map))
(defun helm-buffers-get-visible-buffers ()
"Returns buffers visible on visible frames."
(let (result)
(walk-windows
(lambda (x)
(push (buffer-name (window-buffer x)) result))
nil 'visible)
result))
(defun helm-buffer-list-1 (&optional visibles)
"Return list of all buffers except VISIBLES buffers."
(cl-loop for b in (buffer-list)
for bn = (buffer-name b)
unless (member bn visibles)
collect bn))
(defun helm-buffers-reorder-buffer-list (visibles others)
"Default function to reorder buffer-list.
Arg VISIBLES handles the buffers visibles in this frame.
Arg OTHERS handles all the other buffers.
This function returns OTHERS buffers on top and VISIBLES buffer
at the end."
(nconc others visibles))
(defun helm-buffer-list ()
"Return the current list of buffers.
The list is reordered with `helm-buffer-list-reorder-fn'."
(let* ((visibles (helm-buffers-get-visible-buffers))
(others (helm-buffer-list-1 visibles)))
(funcall helm-buffer-list-reorder-fn visibles others)))
(defun helm-buffer-size (buffer)
"Return size of BUFFER."
(with-current-buffer buffer
(save-restriction
(widen)
(helm-file-human-size
(- (position-bytes (point-max))
(position-bytes (point-min)))))))
(defun helm-buffer--show-details (buf-name prefix help-echo
size mode dir face1 face2
proc details type)
(append
(list
(let* ((buf-fname (buffer-file-name (get-buffer buf-name)))
(ext (if buf-fname (helm-file-name-extension buf-fname) ""))
(bmode (with-current-buffer buf-name major-mode))
(icon-alist (helm-x-icons-resolve-alist 'mode))
(icon (when helm-buffers-show-icons
(helm-aif (and (not (eq type 'indirect))
(assq bmode icon-alist))
(and helm-x-icons-provider
(apply (cadr it) (cddr it)))
(cond ((eq type 'dired)
(helm-x-icons-generic "file-directory"))
((eq type 'indirect)
(helm-x-icons-generic "clone"))
(buf-fname
(helm-x-icons-icon-for-file buf-name))
(t (helm-x-icons-generic "star" :v-adjust 0.0))))))
(buf-name (propertize buf-name 'face face1
'help-echo help-echo
'type type)))
(when (condition-case _err
(string-match (format "\\.\\(%s\\)" ext) buf-name)
(invalid-regexp nil))
(add-face-text-property
(match-beginning 1) (match-end 1)
'helm-ff-file-extension nil buf-name))
(if icon
(concat icon " " prefix buf-name)
(concat prefix buf-name))))
(and details
(list size mode
(propertize
(if proc
(format "(%s %s in `%s')"
(process-name proc)
(process-status proc) dir)
(format "`%s'" dir))
'face face2)))))
(defun helm-buffer--format-mode-name (buf)
"Prevent using `format-mode-line' as much as possible."
(with-current-buffer buf
(helm-acond ((assq major-mode helm-buffer--pretty-names)
(cdr it))
((stringp mode-name) mode-name)
(t (format-mode-line mode-name nil nil (get-buffer buf))))))
(defun helm-buffer--details (buffer &optional details)
(require 'dired)
(let* ((mode (helm-buffer--format-mode-name buffer))
(buf (get-buffer buffer))
(size (propertize (helm-buffer-size buf)
'face 'helm-buffer-size))
(proc (get-buffer-process buf))
(dir (with-current-buffer buffer
(helm-aif default-directory (abbreviate-file-name it))))
(file-name (helm-aif (buffer-file-name buf) (abbreviate-file-name it)))
(name (buffer-name buf))
(name-prefix (when (and dir (file-remote-p dir))
(propertize "@ " 'face 'helm-ff-prefix)))
(archive-p (and (fboundp 'tramp-archive-file-name-p)
(tramp-archive-file-name-p dir))))
(when name-prefix
;; Remote tramp buffer names may be hexified, make them more readable.
(setq dir (helm-url-unhex-string dir)
name (helm-url-unhex-string name)))
;; Handle tramp archive buffers specially.
(if archive-p
(helm-buffer--show-details
name name-prefix file-name size mode dir
'helm-buffer-archive 'helm-buffer-process nil details 'filebuf)
;; No fancy things on remote buffers.
(if (and name-prefix helm-buffer-skip-remote-checking)
(helm-buffer--show-details
name name-prefix file-name size mode dir
'helm-buffer-file 'helm-buffer-process nil details 'filebuf)
(helm-acond
(;; A dired buffer.
(rassoc buf dired-buffers)
(helm-buffer--show-details
name name-prefix dir size mode dir
'helm-buffer-directory 'helm-buffer-process nil details 'dired))
;; A buffer file modified somewhere outside of emacs.=>red
((and file-name
(file-exists-p file-name)
(not (verify-visited-file-modtime buf)))
(helm-buffer--show-details
name name-prefix file-name size mode dir
'helm-buffer-saved-out 'helm-buffer-process nil details 'modout))
;; A new buffer file not already saved on disk (or a deleted file) .=>indianred2
((and file-name (not (file-exists-p file-name)))
(helm-buffer--show-details
name name-prefix file-name size mode dir
'helm-buffer-not-saved 'helm-buffer-process nil details 'notsaved))
;; A buffer file modified and not saved on disk.=>orange
((and file-name (buffer-modified-p buf))
(helm-buffer--show-details
name name-prefix file-name size mode dir
'helm-buffer-modified 'helm-buffer-process nil details 'mod))
;; A buffer file not modified and saved on disk.=>green
(file-name
(helm-buffer--show-details
name name-prefix file-name size mode dir
'helm-buffer-file 'helm-buffer-process nil details 'filebuf))
;; Indirect buffer.=>DimGray
((buffer-base-buffer buf)
(let ((face (if (or (buffer-modified-p it)
(with-current-buffer it
(and helm-buffers-tick-counter
(/= helm-buffers-tick-counter
(buffer-modified-tick)))))
'helm-buffer-modified
'helm-indirect-buffer)))
(helm-buffer--show-details
name name-prefix dir size mode dir
face 'helm-buffer-process nil details 'indirect)))
;; A non-file, modified buffer See bug#1917
((with-current-buffer name
(and helm-buffers-tick-counter
(/= helm-buffers-tick-counter (buffer-modified-tick))))
(helm-buffer--show-details
name (and proc name-prefix) dir size mode dir
'helm-no-file-buffer-modified 'helm-buffer-process proc details 'nofile-mod))
;; Any non--file buffer.=>italic
(t
(helm-buffer--show-details
name (and proc name-prefix) dir size mode dir
'helm-non-file-buffer 'helm-buffer-process proc details 'nofile)))))))
(defun helm-highlight-buffers (buffers _source)
"Transformer function to highlight BUFFERS list.
Should be called after others transformers i.e. (boring
buffers)."
(cl-assert helm-fuzzy-matching-highlight-fn nil "Wrong type argument functionp: nil")
(cl-loop for i in buffers
for (name size mode meta) = (if helm-buffer-details-flag
(helm-buffer--details i 'details)
(helm-buffer--details i))
for truncbuf = (if (> (string-width name) helm-buffer-max-length)
(helm-substring-by-width
name helm-buffer-max-length
helm-buffers-end-truncated-string)
(concat name
(make-string
(- (+ helm-buffer-max-length
(length
helm-buffers-end-truncated-string))
(string-width name))
? )))
for len = (length mode)
when (> len helm-buffer-max-len-mode)
do (setq helm-buffer-max-len-mode len)
for fmode = (concat (make-string
(- (max helm-buffer-max-len-mode len) len) ? )
mode)
;; The max length of a number should be 1023.9X where X is the
;; units, this is 7 characters.
for formatted-size = (and size (format "%7s" size))
collect (let ((helm-pattern (helm-buffers--pattern-sans-filters
(and helm-buffers-fuzzy-matching ""))))
(cons (if helm-buffer-details-flag
(concat
(funcall helm-fuzzy-matching-highlight-fn
truncbuf)
helm-buffers-column-separator
formatted-size
helm-buffers-column-separator
fmode
helm-buffers-column-separator
meta)
(funcall helm-fuzzy-matching-highlight-fn name))
(get-buffer i)))))
(defun helm-buffer--get-preselection (buffer)
(let* ((bufname (buffer-name buffer))
(dispbuf (car (helm-buffer--details buffer)))
(len-dispbuf (string-width dispbuf))
(len-prefix (- len-dispbuf (string-width bufname))))
(when (and bufname
(file-remote-p (with-current-buffer bufname
default-directory)))
(setq bufname (concat "@ " (helm-url-unhex-string bufname))))
(concat "^[[:multibyte:] ]*"
(if (and (null helm-buffer-details-flag)
(numberp helm-buffer-max-length)
(> len-dispbuf helm-buffer-max-length))
(regexp-quote
(helm-substring-by-width
bufname
(- helm-buffer-max-length len-prefix)
helm-buffers-end-truncated-string))
(concat (regexp-quote bufname)
(if helm-buffer-details-flag
"$" "[[:blank:]]+"))))))
(defun helm-toggle-buffers-details ()
(interactive)
(with-helm-alive-p
(let* ((buf (helm-get-selection))
(preselect (helm-buffer--get-preselection buf)))
(setq helm-buffer-details-flag (not helm-buffer-details-flag))
(helm-force-update (lambda ()
(helm-awhile (re-search-forward preselect nil t)
(helm-mark-current-line)
(when (equal buf (helm-get-selection))
(cl-return t))))))))
(put 'helm-toggle-buffers-details 'helm-only t)
(defun helm-buffers--pattern-sans-filters (&optional separator)
(cl-loop for p in (helm-mm-split-pattern helm-pattern)
unless (member (substring p 0 1) '("*" "/" "@" "!"))
collect p into lst
finally return (mapconcat #'identity lst (or separator " "))))
(defun helm-buffers-sort-transformer (candidates source)
(cl-assert helm-buffers-sort-fn nil "Wrong type argument functionp: nil")
(if (string= helm-pattern "")
candidates
(let ((helm-pattern (helm-buffers--pattern-sans-filters)))
(funcall helm-buffers-sort-fn candidates source))))
(defun helm-buffers-mark-similar-buffers-1 (&optional type)
(with-helm-window
(let* ((src (helm-get-current-source))
(sel (helm-get-selection nil 'withprop src))
(type (or type (get-text-property
(min 2 (length sel)) 'type sel))))
(helm-map-candidates-in-source src
(lambda (_cand) (helm-make-visible-mark))
(lambda (cand)
(and (not (helm-this-visible-mark))
(eq (get-text-property 2 'type cand) type))))
(helm-mark-current-line)
(helm-display-mode-line src t)
(when helm-marked-candidates
(message "%s candidates marked" (length helm-marked-candidates))
(set-window-margins (selected-window) 1)))))
(defun helm-buffers-mark-similar-buffers ()
"Mark All buffers that have same property `type' than current.
I.e. same color."
(interactive)
(with-helm-alive-p
(let ((marked (helm-marked-candidates)))
(if (and (>= (length marked) 1)
(with-helm-window helm-visible-mark-overlays))
(helm-unmark-all)
(helm-buffers-mark-similar-buffers-1)))))
(put 'helm-buffers-mark-similar-buffers 'helm-only t)
;;; match functions
;;
(defun helm-buffer--match-mjm (pattern mjm)
(when (string-match "\\`\\*" pattern)
(cl-loop with patterns = (split-string (substring pattern 1) ",")
for pat in patterns
if (string-match "\\`!" pat)
collect (string-match (substring pat 1) mjm) into neg
else collect (string-match pat mjm) into pos
finally return
(let ((neg-test (cl-loop for i in neg thereis (numberp i)))
(pos-test (cl-loop for i in pos thereis (numberp i))))
(or
(and neg (not pos) (not neg-test))
(and pos pos-test)
(and neg neg-test (not neg-test)))))))
(defvar helm-buffer--memo-hash (make-hash-table :test 'equal))
(defun helm-buffer--memo-pattern (pattern)
(or (gethash pattern helm-buffer--memo-hash)
(puthash pattern (helm--mapconcat-pattern pattern)
helm-buffer--memo-hash)))
(defun helm-buffer--match-pattern (pattern candidate &optional nofuzzy)
(let ((bfn (if (and helm-buffers-fuzzy-matching
(not nofuzzy)
(not helm-migemo-mode)
(not (string-match "\\`\\^" pattern)))
#'helm-buffer--memo-pattern
#'identity))
(mfn (if helm-migemo-mode
#'helm-mm-migemo-string-match #'string-match)))
(if (string-match "\\`!" pattern)
(not (funcall mfn (funcall bfn (substring pattern 1))
candidate))
(funcall mfn (funcall bfn pattern) candidate))))
(defun helm-buffers--match-from-mjm (candidate)
(let* ((cand (replace-regexp-in-string "^\\s-\\{1\\}" "" candidate))
(buf (get-buffer cand))
(regexp (cl-loop with pattern = helm-pattern
for p in (helm-mm-split-pattern pattern)
when (string-match "\\`\\*" p)
return p)))
(if regexp
(when buf
(with-current-buffer buf
(let ((mjm (symbol-name major-mode)))
(helm-buffer--match-mjm regexp mjm))))
t)))
(defun helm-buffers--match-from-pat (candidate)
(let* ((regexp-list (cl-loop with pattern = helm-pattern
for p in (helm-mm-split-pattern pattern)
unless (string-match
"\\`\\(\\*\\|/\\|@\\)" p)
collect p))
(nofuzzy (cdr regexp-list)))
(if regexp-list
(cl-loop for re in regexp-list
always (helm-buffer--match-pattern re candidate nofuzzy))
t)))
(defun helm-buffers--match-from-inside (candidate)
(let* ((cand (replace-regexp-in-string "^\\s-\\{1\\}" "" candidate))
(buf (get-buffer cand))
(pattern (cl-loop with pat = helm-pattern
for p in (helm-mm-split-pattern pat)
when (string-match "\\`@\\(.*\\)" p)
collect (match-string 1 p) into lst
finally return (mapconcat #'identity lst " ")))
(patterns (helm-mm-3-get-patterns pattern)))
(if (and buf patterns)
(with-current-buffer buf
(save-excursion
(goto-char (point-min))
(cl-loop for (pred . regexp) in patterns
always
(save-excursion
(funcall
pred
(if helm-migemo-mode
(helm-mm-migemo-forward regexp nil t)
(re-search-forward regexp nil t)))))))
t)))
(defun helm-buffers--match-from-directory (candidate)
(let* ((cand (replace-regexp-in-string "^\\s-\\{1\\}" "" candidate))
(buf (get-buffer cand))
(buf-fname (or (buffer-file-name buf)
(car-safe (rassoc buf dired-buffers))))
(regexps (cl-loop with pattern = helm-pattern
for p in (helm-mm-split-pattern pattern)
when (string-match "\\`/" p)
collect p)))
(if regexps
(cl-loop for re in regexps
thereis
(and buf-fname
(string-match
(substring re 1) (helm-basedir buf-fname))))
t)))
(defun helm-buffers-match-function (candidate)
"Default function to match buffers."
(and (helm-buffers--match-from-pat candidate)
(helm-buffers--match-from-mjm candidate)
(helm-buffers--match-from-inside candidate)
(helm-buffers--match-from-directory candidate)))
(defun helm-buffer-query-replace-1 (&optional regexp-flag buffers)
"Query replace in marked buffers.
If REGEXP-FLAG is given use `query-replace-regexp'."
(let ((prompt (if regexp-flag "Query replace regexp" "Query replace"))
(bufs (or buffers (helm-marked-candidates)))
(helm--reading-passwd-or-string t))
(cl-loop with args = (query-replace-read-args prompt regexp-flag t)
for buf in bufs
do
(save-window-excursion
(switch-to-buffer buf)
(save-excursion
(let ((case-fold-search t))
(goto-char (point-min))
(apply #'perform-replace
(list (nth 0 args) (nth 1 args)
t regexp-flag (nth 2 args) nil
multi-query-replace-map))))))))
(defun helm-buffer-query-replace-regexp (_candidate)
(helm-buffer-query-replace-1 'regexp))
(defun helm-buffer-query-replace (_candidate)
(helm-buffer-query-replace-1))
(defun helm-buffer-toggle-diff (candidate)
"Toggle diff buffer CANDIDATE with it's file."
(helm-aif (get-buffer-window "*Diff*" 'visible)
(progn (kill-buffer "*Diff*")
(set-window-buffer it helm-current-buffer))
(let ((buf (get-buffer candidate)))
(if (buffer-file-name buf)
(diff-buffer-with-file buf)
(user-error "Buffer `%s' is not associated to a file"
(buffer-name buf))))))
(helm-make-persistent-command-from-action helm-buffer-diff-persistent
"Toggle diff buffer without quitting helm."
'diff-action 'helm-buffer-toggle-diff)
(defun helm-revert-buffer (candidate)
(with-current-buffer candidate
(helm-aif (or (buffer-file-name)
(buffer-file-name (buffer-base-buffer)))
(and (file-exists-p it) (revert-buffer t t)))))
(defun helm-revert-marked-buffers (_ignore)
(mapc #'helm-revert-buffer (helm-marked-candidates)))
(defun helm-buffer-revert-and-update (_candidate)
(with-helm-buffer
(let ((marked (helm-marked-candidates))
(preselect (helm-buffers--quote-truncated-buffer
(helm-get-selection))))
(cl-loop for buf in marked do (helm-revert-buffer buf))
(when helm-marked-candidates (helm-unmark-all))
(helm-force-update preselect))))
(helm-make-persistent-command-from-action helm-buffer-revert-persistent
"Revert buffer without quitting helm."
'revert-action 'helm-buffer-revert-and-update)
(defun helm-buffer-save-and-update (_candidate)
(with-helm-buffer
(let ((marked (helm-marked-candidates))
(preselect (helm-get-selection nil t))
(enable-recursive-minibuffers t))
(cl-assert marked nil "No buffers need to be saved")
(cl-loop for buf in marked do
(with-current-buffer (get-buffer buf)
(when (or (buffer-file-name)
(buffer-file-name (buffer-base-buffer)))
(save-buffer))))
(when helm-marked-candidates (helm-unmark-all))
(helm-force-update (regexp-quote preselect)))))
(defun helm-buffer-save-some-buffers (_candidate)
(helm-buffers-mark-similar-buffers-1 'mod)
(helm-buffer-save-and-update nil))
(helm-make-persistent-command-from-action helm-buffer-run-save-some-buffers
"Save unsaved file buffers without quitting Helm."
'save-some-action 'helm-buffer-save-some-buffers)
(helm-make-persistent-command-from-action helm-buffer-save-persistent
"Save buffer without quitting Helm."
'save-action 'helm-buffer-save-and-update)
(defun helm-buffers-rename-buffer (candidate)
(with-current-buffer candidate
(rename-buffer (helm-read-string "New name: " (buffer-name)) t)))
(helm-make-command-from-action helm-buffer-run-rename-buffer
"Run rename buffer action from `helm-source-buffers-list'."
'helm-buffers-rename-buffer)
(defun helm-switch-to-buffer-at-linum (candidate)
(let ((linum (read-number
"Line number: "
(with-current-buffer candidate
(line-number-at-pos)))))
(switch-to-buffer candidate)
(goto-char (point-min))
(forward-line (1- linum))))
(helm-make-command-from-action helm-buffer-run-goto-line
"Switch to buffer at line number."
'helm-switch-to-buffer-at-linum)
(helm-make-persistent-command-from-action helm-buffer-run-kill-persistent
"Kill buffer without quitting Helm."
'kill-action 'helm-buffers-persistent-kill)
(defun helm-kill-marked-buffers (_ignore)
(let* ((bufs (helm-marked-candidates))
(killed-bufs (cl-count-if 'kill-buffer bufs)))
(when (buffer-live-p helm-buffer)
(with-helm-buffer
(setq helm-marked-candidates nil
helm-visible-mark-overlays nil)))
(message "Killed %s buffer(s)" killed-bufs)))
(helm-make-command-from-action helm-buffer-run-kill-buffers
"Run kill buffer action from `helm-source-buffers-list'."
'helm-kill-marked-buffers)
(defun helm-buffer-switch-to-shell (candidate)
(require 'helm-files)
(let ((helm-ff-default-directory
(with-current-buffer candidate
default-directory)))
(helm-ff-switch-to-shell nil)))
(helm-make-command-from-action helm-buffer-run-switch-to-shell
"Run switch to shell action from helm-buffers-list."
'helm-buffer-switch-to-shell)
(helm-make-command-from-action helm-buffer-run-grep
"Run Grep action from `helm-source-buffers-list'."
'helm-grep-buffers)
(helm-make-command-from-action helm-buffer-run-zgrep
"Run Grep action from `helm-source-buffers-list'."
'helm-zgrep-buffers)
(helm-make-command-from-action helm-buffer-run-query-replace-regexp
"Run Query replace regexp action from `helm-source-buffers-list'."
'helm-buffer-query-replace-regexp)
(helm-make-command-from-action helm-buffer-run-query-replace
"Run Query replace action from `helm-source-buffers-list'."
'helm-buffer-query-replace)
(helm-make-command-from-action helm-buffer-switch-other-window
"Run switch to other window action from `helm-source-buffers-list'."
'helm-buffer-switch-buffers-other-window)
(defun helm-buffer-switch-to-buffer-other-frame (_candidate)
"Display marked buffers in other frame."
(let ((bufs (helm-marked-candidates)))
(select-frame (make-frame))
(helm-window-show-buffers bufs)))
(defun helm-buffers-maybe-raise-buffer-frame (candidate)
"Raise buffer frame handling buffer CANDIDATE and switch to it."
(let ((oframe (window-frame (get-buffer-window candidate 0))))
(unless (eql oframe (selected-frame))
(raise-frame oframe))
(with-selected-frame oframe
(switch-to-buffer candidate))))
(helm-make-command-from-action helm-buffer-switch-other-frame
"Run switch to other frame action from `helm-source-buffers-list'."
'helm-buffer-switch-to-buffer-other-frame)
(defun helm-buffers-switch-buffers-in-tab (_candidate)
"Display marked buffers in a new tab.
See `helm-buffers-switch-buffers-in-tab-1' for more infos."