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Re: collect-string
From: |
Tak Ota |
Subject: |
Re: collect-string |
Date: |
Fri, 3 Dec 2010 15:15:40 -0800 |
Fri, 3 Dec 2010 14:56:51 -0800: Stefan Monnier <address@hidden> wrote:
> >> > ! '(0)
> >> > ! ;; construct a list of subexpression integers
> >> > ! (mapcar 'string-to-number
> >> > ! (split-string
> >> > ! (let ((default (car
> >> > occur-collect-submatch-history)))
> >> > ! (read-from-minibuffer
> >> > ! (format "Subexpressions to collect (default
> >> > %s): " default)
> >> > ! "" nil nil 'occur-collect-submatch-history
> >> > default)
> >> > ! (car occur-collect-submatch-history)))))
> >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >>
> >> This should be `default', right?
>
> > No, this is the new input value as read-from-minibuffer prepends this
> > value to the history.
>
> Oh, right, there's more parens than I thought. You should use
> `read-string' instead, which will take care of this ugliness.
OK, done. Indeed its cleaner.
*** ../../../d/pub/emacs/emacs-23.2.90/lisp/replace.el Thu Dec 2 16:33:19 2010
--- replace.el Fri Dec 3 15:07:56 2010
***************
*** 527,532 ****
--- 527,535 ----
Maximum length of the history list is determined by the value
of `history-length', which see.")
+ (defvar occur-collect-regexp-history '("\\1")
+ "History of regexp for occur's collect operation")
+
(defun read-regexp (prompt &optional default-value)
"Read regexp as a string using the regexp history and some useful defaults.
Prompt for a regular expression with PROMPT (without a colon and
***************
*** 1028,1037 ****
(nreverse result))))
(defun occur-read-primary-args ()
! (list (read-regexp "List lines matching regexp"
! (car regexp-history))
! (when current-prefix-arg
! (prefix-numeric-value current-prefix-arg))))
(defun occur-rename-buffer (&optional unique-p interactive-p)
"Rename the current *Occur* buffer to *Occur: original-buffer-name*.
--- 1031,1055 ----
(nreverse result))))
(defun occur-read-primary-args ()
! (let* ((perform-collect (consp current-prefix-arg))
! (regexp (read-regexp (if perform-collect
! "Collect strings matching regexp"
! "List lines matching regexp")
! (car regexp-history))))
! (list regexp
! (if perform-collect
! ;; Perform collect operation
! (if (zerop (regexp-opt-depth regexp))
! ;; No subexpression so collect the entire match.
! "\\&"
! ;; Get the regexp for collection pattern.
! (let ((default (car occur-collect-regexp-history)))
! (read-string
! (format "Regexp to collect (default %s): " default)
! nil 'occur-collect-regexp-history default)))
! ;; Otherwise normal occur takes numerical prefix argument.
! (when current-prefix-arg
! (prefix-numeric-value current-prefix-arg))))))
(defun occur-rename-buffer (&optional unique-p interactive-p)
"Rename the current *Occur* buffer to *Occur: original-buffer-name*.
***************
*** 1064,1070 ****
\\<occur-mode-map>\\[describe-mode] in that buffer will explain how.
If REGEXP contains upper case characters (excluding those preceded by `\\')
! and `search-upper-case' is non-nil, the matching is case-sensitive."
(interactive (occur-read-primary-args))
(occur-1 regexp nlines (list (current-buffer))))
--- 1082,1099 ----
\\<occur-mode-map>\\[describe-mode] in that buffer will explain how.
If REGEXP contains upper case characters (excluding those preceded by `\\')
! and `search-upper-case' is non-nil, the matching is case-sensitive.
!
! When NLINES is a string or when the function is called
! interactively with prefix argument without a number (`C-u' alone
! as prefix) the matching strings are collected into the `*Occur*'
! buffer by using NLINES as a replacement regexp. NLINES may
! contain \\& and \\N which convention follows `replace-match'.
! For example, providing \"defun\\s +\\(\\S +\\)\" for REGEXP and
! \"\\1\" for NLINES collects all the function names in a lisp
! program. When there is no parenthesized subexpressions in REGEXP
! the entire match is collected. In any case the searched buffers
! are not modified."
(interactive (occur-read-primary-args))
(occur-1 regexp nlines (list (current-buffer))))
***************
*** 1146,1165 ****
(setq occur-buf (get-buffer-create buf-name))
(with-current-buffer occur-buf
! (occur-mode)
(let ((inhibit-read-only t)
;; Don't generate undo entries for creation of the initial contents.
(buffer-undo-list t))
(erase-buffer)
! (let ((count (occur-engine
! regexp active-bufs occur-buf
! (or nlines list-matching-lines-default-context-lines)
! (if (and case-fold-search search-upper-case)
! (isearch-no-upper-case-p regexp t)
! case-fold-search)
! list-matching-lines-buffer-name-face
! nil list-matching-lines-face
! (not (eq occur-excluded-properties t)))))
(let* ((bufcount (length active-bufs))
(diff (- (length bufs) bufcount)))
(message "Searched %d buffer%s%s; %s match%s for `%s'"
--- 1175,1217 ----
(setq occur-buf (get-buffer-create buf-name))
(with-current-buffer occur-buf
! (if (stringp nlines)
! (fundamental-mode) ;; This is for collect opeartion.
! (occur-mode))
(let ((inhibit-read-only t)
;; Don't generate undo entries for creation of the initial contents.
(buffer-undo-list t))
(erase-buffer)
! (let ((count
! (if (stringp nlines)
! ;; Treat nlines as a regexp to collect.
! (let ((bufs active-bufs)
! (count 0))
! (while bufs
! (with-current-buffer (car bufs)
! (save-excursion
! (goto-char (point-min))
! (while (re-search-forward regexp nil t)
! ;; Insert the replacement regexp.
! (let ((str (match-substitute-replacement nlines)))
! (if str
! (with-current-buffer occur-buf
! (insert str)
! (setq count (1+ count))
! (or (zerop (current-column))
! (insert "\n"))))))))
! (setq bufs (cdr bufs)))
! count)
! ;; Perform normal occur.
! (occur-engine
! regexp active-bufs occur-buf
! (or nlines list-matching-lines-default-context-lines)
! (if (and case-fold-search search-upper-case)
! (isearch-no-upper-case-p regexp t)
! case-fold-search)
! list-matching-lines-buffer-name-face
! nil list-matching-lines-face
! (not (eq occur-excluded-properties t))))))
(let* ((bufcount (length active-bufs))
(diff (- (length bufs) bufcount)))
(message "Searched %d buffer%s%s; %s match%s for `%s'"
> >> Hmm... I didn't think of NLINES turning into a list of submatch-numbers,
> >> but that makes me think that maybe we should go one step further and
> >> turn it into a string, like the ones used in replace-match.
> > This is truly brilliant. Thank you very much. I love this idea
> > bouncing process. See below.
>
> It's not always as successful, sadly. But yes, it turned out very well
> this time.
As long as people behave rationally with patience and not carried too
much away by own belief it should work fine most of the time. I'm
glad I haven't been involved in sad cases.
-Tak