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;;; rxi.el --- Interactive regexp reading using rx format
;;
;; Author: Lennart Borgman (lennart O borgman A gmail O com)
;; Created: 2008-04-07T18:18:39+0200 Mon
;; Version:
;; Last-Updated:
;; URL:
;; Keywords:
;; Compatibility:
;;
;; Features that might be required by this library:
;;
;; None
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;;
;; Read regexp as `rx' forms from minibuffer.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Change log:
;;
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; 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 2, 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; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
;; Floor, Boston, MA 02110-1301, USA.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Code:
(defvar rxi-read-hist nil)
(defun rxi-find-definition (rx-sym)
(let* ((rec (assoc rx-sym rx-constituents))
)
(while (symbolp (cdr rec))
(setq rec (assoc (cdr rec) rx-constituents)))
(cdr rec)))
(defun rxi-list-type-p (rx-sym)
(listp (rxi-find-definition rx-sym)))
(defun rxi-complete ()
"Complete `rx' constituents."
(interactive)
;; Don't care about state for now, there will be an error instead
(let* ((partial (when (looking-back (rx (1+ (any "a-z01:|=>*?+\\-"))) nil t)
(match-string-no-properties 0)))
(candidates (let ((want-list
(= ?\( (char-before (match-beginning 0)))))
(delq nil
(mapcar (lambda (rec)
(let* ((sym (car rec))
(lst (rxi-list-type-p sym)))
(when (or (and want-list lst)
(and (not want-list)
(not lst)))
(symbol-name sym))))
rx-constituents))))
(match-set (when partial
(all-completions
partial
candidates))))
(cond
((not match-set)
(message "No completions"))
((= 1 (length match-set))
(insert (substring (car match-set) (length partial))))
(t
(with-output-to-temp-buffer "*Completions*"
(display-completion-list match-set partial))))))
(defvar rxi-read-keymap
(let ((map (make-sparse-keymap)))
(set-keymap-parent map minibuffer-local-completion-map)
(define-key map [tab] 'rxi-complete)
(define-key map [(meta tab)] 'rxi-complete)
(define-key map [?\ ] 'self-insert-command)
map))
(defvar rxi-trailing-overlay nil)
(defun rxi-minibuf-setup ()
(when rxi-trailing-overlay (delete-overlay rxi-trailing-overlay))
(setq rxi-trailing-overlay
(make-overlay (point-max) (point-max)
(current-buffer)
t t))
(overlay-put rxi-trailing-overlay 'after-string
(propertize ")"
'face
(if (and
(fboundp 'noticeable-minibuffer-prompts-mode)
noticeable-minibuffer-prompts-mode)
'minibuffer-noticeable-prompt
'minibuffer-prompt)))
(remove-hook 'minibuffer-setup-hook 'rxi-minibuf-setup))
(defun rxi-minibuf-exit ()
(when rxi-trailing-overlay
(delete-overlay rxi-trailing-overlay)
(setq rxi-trailing-overlay nil))
(remove-hook 'minibuffer-exit-hook 'rxi-minibuf-exit))
(defun rxi-read (prompt)
"Read a `rx' regexp form from minibuffer.
Return cons of rx and regexp, both as strings."
(interactive (list "Test (rx "))
(let (rx-str rx-full-str res-regexp)
(while (not res-regexp)
(condition-case err
(progn
(add-hook 'minibuffer-setup-hook 'rxi-minibuf-setup)
(add-hook 'minibuffer-exit-hook 'rxi-minibuf-exit)
(setq rx-str (read-from-minibuffer prompt
rx-str ;; initial-contents
rxi-read-keymap
nil ;; read
'rxi-read-hist
nil ;; inherit-input-method - no idea...
))
(setq rx-full-str (concat "(rx " rx-str ")"))
(setq res-regexp (eval (read rx-full-str))))
(error (message "%s" (error-message-string err))
(sit-for 2))))
(when (with-no-warnings (called-interactively-p)) (message "%s => \"%s\"" rx-full-str res-regexp))
(cons rx-full-str res-regexp)))
(provide 'rxi)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; rxi.el ends here
|
