485 lines
18 KiB
EmacsLisp
485 lines
18 KiB
EmacsLisp
;;; smex.el --- M-x interface with Ido-style fuzzy matching. -*- lexical-binding: t; -*-
|
|
|
|
;; Copyright (C) 2009-2014 Cornelius Mika and contributors
|
|
;;
|
|
;; Author: Cornelius Mika <cornelius.mika@gmail.com> and contributors
|
|
;; URL: http://github.com/nonsequitur/smex/
|
|
;; Package-Version: 20151212.1409
|
|
;; Package-Requires: ((emacs "24"))
|
|
;; Version: 3.0
|
|
;; Keywords: convenience, usability
|
|
|
|
;; This file is not part of GNU Emacs.
|
|
|
|
;;; License:
|
|
|
|
;; Licensed under the same terms as Emacs.
|
|
|
|
;;; Commentary:
|
|
|
|
;; Quick start:
|
|
;; run (smex-initialize)
|
|
;;
|
|
;; Bind the following commands:
|
|
;; smex, smex-major-mode-commands
|
|
;;
|
|
;; For a detailed introduction see:
|
|
;; http://github.com/nonsequitur/smex/blob/master/README.markdown
|
|
|
|
;;; Code:
|
|
|
|
(require 'ido)
|
|
|
|
(defgroup smex nil
|
|
"M-x interface with Ido-style fuzzy matching and ranking heuristics."
|
|
:group 'extensions
|
|
:group 'convenience
|
|
:link '(emacs-library-link :tag "Lisp File" "smex.el"))
|
|
|
|
(defcustom smex-auto-update t
|
|
"If non-nil, `Smex' checks for new commands each time it is run.
|
|
Turn it off for minor speed improvements on older systems."
|
|
:type 'boolean
|
|
:group 'smex)
|
|
|
|
(defcustom smex-save-file (locate-user-emacs-file "smex-items" ".smex-items")
|
|
"File in which the smex state is saved between Emacs sessions.
|
|
Variables stored are: `smex-data', `smex-history'.
|
|
Must be set before initializing Smex."
|
|
:type 'string
|
|
:group 'smex)
|
|
|
|
(defcustom smex-history-length 7
|
|
"Determines on how many recently executed commands
|
|
Smex should keep a record.
|
|
Must be set before initializing Smex."
|
|
:type 'integer
|
|
:group 'smex)
|
|
|
|
(defcustom smex-prompt-string "M-x "
|
|
"String to display in the Smex prompt."
|
|
:type 'string
|
|
:group 'smex)
|
|
|
|
(defcustom smex-flex-matching t
|
|
"Enables Ido flex matching. On by default.
|
|
Set this to nil to disable fuzzy matching."
|
|
:type 'boolean
|
|
:group 'smex)
|
|
|
|
(defvar smex-initialized-p nil)
|
|
(defvar smex-cache)
|
|
(defvar smex-ido-cache)
|
|
(defvar smex-data)
|
|
(defvar smex-history)
|
|
(defvar smex-command-count 0)
|
|
(defvar smex-custom-action nil)
|
|
|
|
;; Check if Smex is supported
|
|
(when (equal (cons 1 1)
|
|
(ignore-errors
|
|
(subr-arity (symbol-function 'execute-extended-command))))
|
|
(error "Your Emacs has a non-elisp version of `execute-extended-command', which is incompatible with Smex"))
|
|
|
|
;;--------------------------------------------------------------------------------
|
|
;; Smex Interface
|
|
|
|
;;;###autoload
|
|
(defun smex ()
|
|
(interactive)
|
|
(unless smex-initialized-p
|
|
(smex-initialize))
|
|
(if (smex-already-running)
|
|
(smex-update-and-rerun)
|
|
(and smex-auto-update
|
|
(smex-detect-new-commands)
|
|
(smex-update))
|
|
(smex-read-and-run smex-ido-cache)))
|
|
|
|
(defun smex-already-running ()
|
|
(and (boundp 'ido-choice-list)
|
|
(eql ido-choice-list smex-ido-cache)
|
|
(minibuffer-window-active-p (selected-window))))
|
|
|
|
(defun smex-update-and-rerun ()
|
|
(smex-do-with-selected-item
|
|
(lambda (_) (smex-update) (smex-read-and-run smex-ido-cache ido-text))))
|
|
|
|
(defun smex-read-and-run (commands &optional initial-input)
|
|
(let* ((chosen-item-name (smex-completing-read commands initial-input))
|
|
(chosen-item (intern chosen-item-name)))
|
|
(if smex-custom-action
|
|
(let ((action smex-custom-action))
|
|
(setq smex-custom-action nil)
|
|
(funcall action chosen-item))
|
|
(unwind-protect
|
|
(with-no-warnings ; Don't warn about interactive use of `execute-extended-command'
|
|
(execute-extended-command current-prefix-arg chosen-item-name))
|
|
(smex-rank chosen-item)))))
|
|
|
|
;;;###autoload
|
|
(defun smex-major-mode-commands ()
|
|
"Like `smex', but limited to commands that are relevant to the active major mode."
|
|
(interactive)
|
|
(unless smex-initialized-p
|
|
(smex-initialize))
|
|
(let ((commands (delete-dups (append (smex-extract-commands-from-keymap (current-local-map))
|
|
(smex-extract-commands-from-features major-mode)))))
|
|
(setq commands (smex-sort-according-to-cache commands))
|
|
(setq commands (mapcar #'symbol-name commands))
|
|
(smex-read-and-run commands)))
|
|
|
|
(defun smex-completing-read (choices initial-input)
|
|
(let ((ido-completion-map ido-completion-map)
|
|
(ido-setup-hook (cons 'smex-prepare-ido-bindings ido-setup-hook))
|
|
(ido-enable-prefix nil)
|
|
(ido-enable-flex-matching smex-flex-matching)
|
|
(ido-max-prospects 10)
|
|
(minibuffer-completion-table choices))
|
|
(ido-completing-read (smex-prompt-with-prefix-arg) choices nil nil
|
|
initial-input 'extended-command-history (car choices))))
|
|
|
|
(defun smex-prompt-with-prefix-arg ()
|
|
(if (not current-prefix-arg)
|
|
smex-prompt-string
|
|
(concat
|
|
(if (eq current-prefix-arg '-)
|
|
"- "
|
|
(if (integerp current-prefix-arg)
|
|
(format "%d " current-prefix-arg)
|
|
(if (= (car current-prefix-arg) 4)
|
|
"C-u "
|
|
(format "%d " (car current-prefix-arg)))))
|
|
smex-prompt-string)))
|
|
|
|
(defun smex-prepare-ido-bindings ()
|
|
(define-key ido-completion-map (kbd "TAB") 'minibuffer-complete)
|
|
(define-key ido-completion-map (kbd "C-h f") 'smex-describe-function)
|
|
(define-key ido-completion-map (kbd "C-h w") 'smex-where-is)
|
|
(define-key ido-completion-map (kbd "M-.") 'smex-find-function)
|
|
(define-key ido-completion-map (kbd "C-a") 'move-beginning-of-line))
|
|
|
|
;;--------------------------------------------------------------------------------
|
|
;; Cache and Maintenance
|
|
|
|
(defun smex-rebuild-cache ()
|
|
(interactive)
|
|
(setq smex-cache nil)
|
|
|
|
;; Build up list 'new-commands' and later put it at the end of 'smex-cache'.
|
|
;; This speeds up sorting.
|
|
(let (new-commands)
|
|
(mapatoms (lambda (symbol)
|
|
(when (commandp symbol)
|
|
(let ((known-command (assq symbol smex-data)))
|
|
(if known-command
|
|
(setq smex-cache (cons known-command smex-cache))
|
|
(setq new-commands (cons (list symbol) new-commands)))))))
|
|
(if (eq (length smex-cache) 0)
|
|
(setq smex-cache new-commands)
|
|
(setcdr (last smex-cache) new-commands)))
|
|
|
|
(setq smex-cache (sort smex-cache 'smex-sorting-rules))
|
|
(smex-restore-history)
|
|
(setq smex-ido-cache (smex-convert-for-ido smex-cache)))
|
|
|
|
(defun smex-convert-for-ido (command-items)
|
|
(mapcar (lambda (command-item) (symbol-name (car command-item))) command-items))
|
|
|
|
(defun smex-restore-history ()
|
|
"Rearranges `smex-cache' according to `smex-history'"
|
|
(if (> (length smex-history) smex-history-length)
|
|
(setcdr (nthcdr (- smex-history-length 1) smex-history) nil))
|
|
(mapc (lambda (command)
|
|
(unless (eq command (caar smex-cache))
|
|
(let ((command-cell-position (smex-detect-position
|
|
smex-cache
|
|
(lambda (cell)
|
|
(eq command (caar cell))))))
|
|
(when command-cell-position
|
|
(let ((command-cell (smex-remove-nth-cell
|
|
command-cell-position smex-cache)))
|
|
(setcdr command-cell smex-cache)
|
|
(setq smex-cache command-cell))))))
|
|
(reverse smex-history)))
|
|
|
|
(defun smex-sort-according-to-cache (list)
|
|
"Sorts a list of commands by their order in `smex-cache'"
|
|
(let (sorted)
|
|
(dolist (command-item smex-cache)
|
|
(let ((command (car command-item)))
|
|
(when (memq command list)
|
|
(setq sorted (cons command sorted))
|
|
(setq list (delq command list)))))
|
|
(nreverse (append list sorted))))
|
|
|
|
(defun smex-update ()
|
|
(interactive)
|
|
(smex-save-history)
|
|
(smex-rebuild-cache))
|
|
|
|
(defun smex-detect-new-commands ()
|
|
(let ((i 0))
|
|
(mapatoms (lambda (symbol) (if (commandp symbol) (setq i (1+ i)))))
|
|
(unless (= i smex-command-count)
|
|
(setq smex-command-count i))))
|
|
|
|
(defun smex-auto-update (&optional idle-time)
|
|
"Update Smex when Emacs has been idle for IDLE-TIME."
|
|
(unless idle-time (setq idle-time 60))
|
|
(run-with-idle-timer idle-time t
|
|
'(lambda () (if (smex-detect-new-commands) (smex-update)))))
|
|
|
|
;;;###autoload
|
|
(defun smex-initialize ()
|
|
(interactive)
|
|
(unless ido-mode (smex-initialize-ido))
|
|
(smex-load-save-file)
|
|
(smex-detect-new-commands)
|
|
(smex-rebuild-cache)
|
|
(add-hook 'kill-emacs-hook 'smex-save-to-file)
|
|
(setq smex-initialized-p t))
|
|
|
|
(defun smex-initialize-ido ()
|
|
"Sets up a minimal Ido environment for `ido-completing-read'."
|
|
(with-no-warnings ; `ido-init-completion-maps' is deprecated in Emacs 25
|
|
(ido-init-completion-maps))
|
|
(add-hook 'minibuffer-setup-hook 'ido-minibuffer-setup))
|
|
|
|
(defsubst smex-save-file-not-empty-p ()
|
|
(string-match-p "\[^[:space:]\]" (buffer-string)))
|
|
|
|
(defun smex-load-save-file ()
|
|
"Loads `smex-history' and `smex-data' from `smex-save-file'"
|
|
(let ((save-file (expand-file-name smex-save-file)))
|
|
(if (file-readable-p save-file)
|
|
(with-temp-buffer
|
|
(insert-file-contents save-file)
|
|
(condition-case nil
|
|
(setq smex-history (read (current-buffer))
|
|
smex-data (read (current-buffer)))
|
|
(error (if (smex-save-file-not-empty-p)
|
|
(error "Invalid data in smex-save-file (%s). Can't restore history."
|
|
smex-save-file)
|
|
(unless (boundp 'smex-history) (setq smex-history nil))
|
|
(unless (boundp 'smex-data) (setq smex-data nil))))))
|
|
(setq smex-history nil smex-data nil))))
|
|
|
|
(defun smex-save-history ()
|
|
"Updates `smex-history'"
|
|
(setq smex-history nil)
|
|
(let ((cell smex-cache))
|
|
(dotimes (_ smex-history-length)
|
|
(setq smex-history (cons (caar cell) smex-history))
|
|
(setq cell (cdr cell))))
|
|
(setq smex-history (nreverse smex-history)))
|
|
|
|
(defmacro smex-pp (list-var)
|
|
`(smex-pp* ,list-var ,(symbol-name list-var)))
|
|
|
|
(defun smex-save-to-file ()
|
|
(interactive)
|
|
(smex-save-history)
|
|
(with-temp-file (expand-file-name smex-save-file)
|
|
(smex-pp smex-history)
|
|
(smex-pp smex-data)))
|
|
|
|
;;--------------------------------------------------------------------------------
|
|
;; Ranking
|
|
|
|
(defun smex-sorting-rules (command-item other-command-item)
|
|
"Returns true if COMMAND-ITEM should sort before OTHER-COMMAND-ITEM."
|
|
(let* ((count (or (cdr command-item ) 0))
|
|
(other-count (or (cdr other-command-item) 0))
|
|
(name (car command-item))
|
|
(other-name (car other-command-item))
|
|
(length (length (symbol-name name)))
|
|
(other-length (length (symbol-name other-name))))
|
|
(or (> count other-count) ; 1. Frequency of use
|
|
(and (= count other-count)
|
|
(or (< length other-length) ; 2. Command length
|
|
(and (= length other-length)
|
|
(string< name other-name))))))) ; 3. Alphabetical order
|
|
|
|
(defun smex-rank (command)
|
|
(let ((command-item (or (assq command smex-cache)
|
|
;; Update caches and try again if not found.
|
|
(progn (smex-update)
|
|
(assq command smex-cache)))))
|
|
(when command-item
|
|
(smex-update-counter command-item)
|
|
|
|
;; Don't touch the cache order if the chosen command
|
|
;; has just been execucted previously.
|
|
(unless (eq command-item (car smex-cache))
|
|
(let (command-cell
|
|
(pos (smex-detect-position smex-cache (lambda (cell)
|
|
(eq command-item (car cell))))))
|
|
;; Remove the just executed command.
|
|
(setq command-cell (smex-remove-nth-cell pos smex-cache))
|
|
;; And put it on top of the cache.
|
|
(setcdr command-cell smex-cache)
|
|
(setq smex-cache command-cell)
|
|
|
|
;; Repeat the same for the ido cache. Should this be DRYed?
|
|
(setq command-cell (smex-remove-nth-cell pos smex-ido-cache))
|
|
(setcdr command-cell smex-ido-cache)
|
|
(setq smex-ido-cache command-cell)
|
|
|
|
;; Now put the last history item back to its normal place.
|
|
(smex-sort-item-at smex-history-length))))))
|
|
|
|
(defun smex-update-counter (command-item)
|
|
(let ((count (cdr command-item)))
|
|
(setcdr command-item
|
|
(if count
|
|
(1+ count)
|
|
;; Else: Command has just been executed for the first time.
|
|
;; Add it to `smex-data'.
|
|
(if smex-data
|
|
(setcdr (last smex-data) (list command-item))
|
|
(setq smex-data (list command-item)))
|
|
1))))
|
|
|
|
(defun smex-sort-item-at (n)
|
|
"Sorts item at position N in `smex-cache'."
|
|
(let* ((command-cell (nthcdr n smex-cache))
|
|
(command-item (car command-cell)))
|
|
(let ((insert-at (smex-detect-position
|
|
command-cell
|
|
(lambda (cell)
|
|
(smex-sorting-rules command-item (car cell))))))
|
|
;; TODO: Should we handle the case of 'insert-at' being nil?
|
|
;; This will never happen in practice.
|
|
(when (> insert-at 1)
|
|
(setq command-cell (smex-remove-nth-cell n smex-cache))
|
|
;; smex-cache just got shorter by one element, so subtract '1' from insert-at.
|
|
(setq insert-at (+ n (- insert-at 1)))
|
|
(smex-insert-cell command-cell insert-at smex-cache)
|
|
|
|
;; Repeat the same for the ido cache. DRY?
|
|
(setq command-cell (smex-remove-nth-cell n smex-ido-cache))
|
|
(smex-insert-cell command-cell insert-at smex-ido-cache)))))
|
|
|
|
(defun smex-detect-position (cell function)
|
|
"Detects, relatively to CELL, the position of the cell
|
|
on which FUNCTION returns true.
|
|
Only checks cells after CELL, starting with the cell right after CELL.
|
|
Returns nil when reaching the end of the list."
|
|
(let ((pos 1))
|
|
(catch 'break
|
|
(while t
|
|
(setq cell (cdr cell))
|
|
(if (not cell)
|
|
(throw 'break nil)
|
|
(if (funcall function cell) (throw 'break pos))
|
|
(setq pos (1+ pos)))))))
|
|
|
|
(defun smex-remove-nth-cell (n list)
|
|
"Removes and returns the Nth cell in LIST."
|
|
(let* ((previous-cell (nthcdr (- n 1) list))
|
|
(result (cdr previous-cell)))
|
|
(setcdr previous-cell (cdr result))
|
|
result))
|
|
|
|
(defun smex-insert-cell (new-cell n list)
|
|
"Inserts cell at position N in LIST."
|
|
(let* ((cell (nthcdr (- n 1) list))
|
|
(next-cell (cdr cell)))
|
|
(setcdr (setcdr cell new-cell) next-cell)))
|
|
|
|
;;--------------------------------------------------------------------------------
|
|
;; Help and Reference
|
|
|
|
(defun smex-do-with-selected-item (fn)
|
|
(setq smex-custom-action fn)
|
|
(ido-exit-minibuffer))
|
|
|
|
(defun smex-describe-function ()
|
|
(interactive)
|
|
(smex-do-with-selected-item (lambda (chosen)
|
|
(describe-function chosen)
|
|
(pop-to-buffer "*Help*"))))
|
|
|
|
(defun smex-where-is ()
|
|
(interactive)
|
|
(smex-do-with-selected-item 'where-is))
|
|
|
|
(defun smex-find-function ()
|
|
(interactive)
|
|
(smex-do-with-selected-item 'find-function))
|
|
|
|
(defun smex-extract-commands-from-keymap (map)
|
|
(let (commands)
|
|
(smex-parse-keymap map commands)
|
|
commands))
|
|
|
|
(defun smex-parse-keymap (map commands)
|
|
(map-keymap (lambda (_binding element)
|
|
(if (and (listp element) (eq 'keymap (car element)))
|
|
(smex-parse-keymap element commands)
|
|
;; Strings are commands, too. Reject them.
|
|
(if (and (symbolp element) (commandp element))
|
|
(push element commands))))
|
|
map))
|
|
|
|
(defun smex-extract-commands-from-features (mode)
|
|
(let ((library-path (symbol-file mode))
|
|
(mode-name (symbol-name mode))
|
|
commands)
|
|
|
|
(string-match "\\(.+?\\)\\(-mode\\)?$" mode-name)
|
|
;; 'lisp-mode' -> 'lisp'
|
|
(setq mode-name (match-string 1 mode-name))
|
|
(if (string= mode-name "c") (setq mode-name "cc"))
|
|
(setq mode-name (regexp-quote mode-name))
|
|
|
|
(dolist (feature load-history)
|
|
(let ((feature-path (car feature)))
|
|
(when (and feature-path (or (equal feature-path library-path)
|
|
(string-match mode-name (file-name-nondirectory
|
|
feature-path))))
|
|
(dolist (item (cdr feature))
|
|
(if (and (listp item) (eq 'defun (car item)))
|
|
(let ((function (cdr item)))
|
|
(when (commandp function)
|
|
(setq commands (append commands (list function))))))))))
|
|
commands))
|
|
|
|
(defun smex-show-unbound-commands ()
|
|
"Shows unbound commands in a new buffer,
|
|
sorted by frequency of use."
|
|
(interactive)
|
|
(setq smex-data (sort smex-data 'smex-sorting-rules))
|
|
(let ((unbound-commands (delq nil
|
|
(mapcar (lambda (command-item)
|
|
(unless (where-is-internal (car command-item))
|
|
command-item))
|
|
smex-data))))
|
|
(view-buffer-other-window "*Smex: Unbound Commands*")
|
|
(setq buffer-read-only t)
|
|
(let ((inhibit-read-only t))
|
|
(erase-buffer)
|
|
(smex-pp unbound-commands))
|
|
(set-buffer-modified-p nil)
|
|
(goto-char (point-min))))
|
|
|
|
;; A copy of `ido-pp' that's compatible with lexical bindings
|
|
(defun smex-pp* (list list-name)
|
|
(let ((print-level nil) (eval-expression-print-level nil)
|
|
(print-length nil) (eval-expression-print-length nil))
|
|
(insert "\n;; ----- " list-name " -----\n(\n ")
|
|
(while list
|
|
(let* ((elt (car list))
|
|
(s (if (consp elt) (car elt) elt)))
|
|
(if (and (stringp s) (= (length s) 0))
|
|
(setq s nil))
|
|
(if s
|
|
(prin1 elt (current-buffer)))
|
|
(if (and (setq list (cdr list)) s)
|
|
(insert "\n "))))
|
|
(insert "\n)\n")))
|
|
|
|
(provide 'smex)
|
|
;;; smex.el ends here
|