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;;; acdw-re.el -*- lexical-binding: t; coding: utf-8-unix -*-
;; Author: Case Duckworth <(rot13-string "npqj@npqj.arg")>
;; Created: 2021-04-29
;; Keywords: configuration
;; URL: https://tildegit.org/acdw/emacs
;; This file is NOT part of GNU Emacs.
;;; License:
;; Everyone is permitted to do whatever with this software, without
;; limitation. This software comes without any warranty whatsoever,
;; but with two pieces of advice:
;; - Don't hurt yourself.
;; - Make good choices.
;;; Commentary:
;; Pulled mostly from karthinks:
;; https://karthinks.com/software/bridging-islands-in-emacs-1/
;; UPDATED CODE:
;; https://github.com/karthink/.emacs.d/blob/master/init.el#L981
;; https://github.com/karthink/.emacs.d/blob/master/lisp/reb-fix.el
;;; Code:
(require 're-builder)
(defvar my/re-builder-positions nil
"Store point and region bounds before calling `re-builder'.")
(defun my/re-builder-save-state (&rest _)
"Save the point and region before calling `re-builder'."
(setq my/re-builder-positions
(cons (point)
(when (region-active-p)
(list (region-beginning)
(region-end))))))
(defun reb-replace-regexp (&optional delimited)
"Run `query-replace-regexp' with the contents of `re-builder'.
With non-nil optional argument DELIMITED, only replace matches
surrounded by word boundaries."
(interactive "P")
(reb-update-regexp)
(let* ((re (reb-target-binding reb-regexp))
(replacement (query-replace-read-to
re
(concat "Query replace"
(if current-prefix-arg
(if (eq current-prefix-arg '-)
" backward"
" word")
"")
" regexp"
(if (with-selected-window reb-target-window
(region-active-p))
" in region"
""))
t))
(pnt (car my/re-builder-positions))
(beg (cadr my/re-builder-positions))
(end (caddr my/re-builder-positions)))
(with-selected-window reb-target-window
(goto-char (or pnt 0))
(setq my/re-builder-positions nil)
(reb-quit)
(query-replace-regexp re replacement delimited beg end))))
;; Restrict re-builder matches to region
(defun reb-update-overlays (&optional subexp)
"Switch to `reb-target-buffer' and mark all matches of `reb-regexp'.
If SUBEXP is non-nil mark only the corresponding sub-expressions."
(let* ((re (reb-target-binding reb-regexp))
(subexps (reb-count-subexps re))
(matches 0)
(submatches 0)
firstmatch
here
start end
firstmatch-after-here)
(with-current-buffer reb-target-buffer
(setq here
(if reb-target-window
(with-selected-window reb-target-window (window-point))
(point))
start
(if (region-active-p)
(nth 1 my/re-builder-positions)
(nth 0 my/re-builder-positions))
end
(if (region-active-p)
(nth 2 my/re-builder-positions)
(point-max)))
(reb-delete-overlays)
(goto-char (or start 0))
(while (and (not (eobp))
(re-search-forward re end t)
(or (not reb-auto-match-limit)
(< matches reb-auto-match-limit)))
(when (and (= 0 (length (match-string 0)))
(not (eobp)))
(forward-char 1))
(let ((i 0)
suffix max-suffix)
(setq matches (1+ matches))
(while (<= i subexps)
(when (and (or (not subexp) (= subexp i))
(match-beginning i))
(let ((overlay (make-overlay (match-beginning i)
(match-end i)))
;; When we have exceeded the number of provided faces,
;; cycle thru them where `max-suffix' denotes the maximum
;; suffix for `reb-match-*' that has been defined and
;; `suffix' the suffix calculated for the current match.
(face
(cond
(max-suffix
(if (= suffix max-suffix)
(setq suffix 1)
(setq suffix (1+ suffix)))
(intern-soft (format "reb-match-%d" suffix)))
((intern-soft (format "reb-match-%d" i)))
((setq max-suffix (1- i))
(setq suffix 1)
;; `reb-match-1' must exist.
'reb-match-1))))
(unless firstmatch (setq firstmatch (match-data)))
(unless firstmatch-after-here
(when (> (point) here)
(setq firstmatch-after-here (match-data))))
(setq reb-overlays (cons overlay reb-overlays)
submatches (1+ submatches))
(overlay-put overlay 'face face)
(overlay-put overlay 'priority i)))
(setq i (1+ i))))))
(let ((count (if subexp submatches matches)))
(message "%s %smatch%s%s"
(if (= 0 count) "No" (int-to-string count))
(if subexp "subexpression " "")
(if (= 1 count) "" "es")
(if (and reb-auto-match-limit
(= reb-auto-match-limit count))
" (limit reached)" "")))
(when firstmatch
(store-match-data (or firstmatch-after-here firstmatch))
(reb-show-subexp (or subexp 0)))))
(provide 'acdw-re)
;;; acdw-re.el ends here
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