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Re: History for query replace pairs
From: |
Juri Linkov |
Subject: |
Re: History for query replace pairs |
Date: |
Sat, 25 Oct 2014 23:52:18 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (x86_64-pc-linux-gnu) |
> The widget library is definitely too heavy. And I don't like the idea
> of making it read-only either. Just use a special character/string, and
> give it a special appearance via text-properties (make sure the user
> can't delete just a part of it, so a single char is best, probably with
> a display property), so that the user can tell it's not just text and so
> that Elisp can reliably recognize it as well.
> E.g. (propertize "\0" 'display (propertize " -> " 'face 'my-face))
Currently there are two user variables `query-replace-from-history-variable'
and `query-replace-to-history-variable' by default both pointing
to the same history variable `query-replace-history'. The simplest
solution would be to add another history variable named
`query-replace-from-to-history', so the users could easily customize
`query-replace-from-history-variable' either to the old value
`query-replace-history' to restore the current functionality,
or customize it to the new from-to pair history.
Below is a preliminary implementation. However, there is a problem
that after saving it to the desktop or savehist, and restoring back
FROM-TO string pairs in the history lose text-properties.
If there is no way to save text properties then perhaps we should have
two history variables: one with cons pairs (FROM . TO) to save
in the desktop, and another with a list of strings "FROM<separator>TO"
to use in `read-from-minibuffer', and keep these two variables in sync.
=== modified file 'lisp/replace.el'
--- lisp/replace.el 2014-08-25 02:36:45 +0000
+++ lisp/replace.el 2014-10-25 20:48:10 +0000
@@ -54,10 +54,11 @@ (defvar query-replace-history nil
See `query-replace-from-history-variable' and
`query-replace-to-history-variable'.")
-(defvar query-replace-defaults nil
- "Default values of FROM-STRING and TO-STRING for `query-replace'.
-This is a cons cell (FROM-STRING . TO-STRING), or nil if there is
-no default value.")
+(defvar query-replace-from-to-history nil
+ "Default history list of FROM-TO strings for `query-replace'.
+This is a list of string pairs of FROM-STRING and TO-STRING
+separated by `query-replace-from-to-separator', or nil
+if there is no history. See `query-replace-from-history-variable'.")
(defvar query-replace-interactive nil
"Non-nil means `query-replace' uses the last search string.
@@ -67,14 +68,24 @@ (make-obsolete-variable 'query-replace-i
to the minibuffer that reads the string to replace, or invoke replacements
from Isearch by using a key sequence like `C-s C-s M-%'." "24.3")
-(defcustom query-replace-from-history-variable 'query-replace-history
+(defvar query-replace-from-to-separator
+ (propertize
+ "\0" 'display (propertize
+ (if (char-displayable-p ?\u2192) " \u2192 " " -> ")
+ 'face 'minibuffer-prompt))
+ "String that separates FROM and TO in `query-replace-from-to-history'.")
+
+(defcustom query-replace-from-history-variable 'query-replace-from-to-history
"History list to use for the FROM argument of `query-replace' commands.
The value of this variable should be a symbol; that symbol
is used as a variable to hold a history list for the strings
or patterns to be replaced."
:group 'matching
- :type 'symbol
- :version "20.3")
+ :type '(choice
+ (const :tag "History of FROM-TO pairs" query-replace-from-to-history)
+ (const :tag "History of FROM strings" query-replace-history)
+ (symbol :tag "Your choice of history list"))
+ :version "24.5")
(defcustom query-replace-to-history-variable 'query-replace-history
"History list to use for the TO argument of `query-replace' commands.
@@ -132,11 +143,10 @@ (defun query-replace-read-from (prompt r
(if query-replace-interactive
(car (if regexp-flag regexp-search-ring search-ring))
(let* ((history-add-new-input nil)
+ (default (car query-replace-from-to-history))
(prompt
- (if query-replace-defaults
- (format "%s (default %s -> %s): " prompt
- (query-replace-descr (car query-replace-defaults))
- (query-replace-descr (cdr query-replace-defaults)))
+ (if query-replace-from-to-history
+ (format "%s (default %s): " prompt default)
(format "%s: " prompt)))
(from
;; The save-excursion here is in case the user marks and copies
@@ -148,11 +158,25 @@ (defun query-replace-read-from (prompt r
(read-from-minibuffer
prompt nil nil nil query-replace-from-history-variable
(car (if regexp-flag regexp-search-ring search-ring)) t)))))
- (if (and (zerop (length from)) query-replace-defaults)
- (cons (car query-replace-defaults)
+ (if (or
+ ;; Default value
+ (and (zerop (length from)) query-replace-from-to-history
+ (string-match query-replace-from-to-separator default))
+ ;; History of FROM-TO pairs
+ (and (eq query-replace-from-history-variable
+ 'query-replace-from-to-history)
+ (string-match query-replace-from-to-separator from)))
+ (let ((from-string (substring (if (zerop (length from)) default from)
0 (match-beginning 0)))
+ (to-string (substring (if (zerop (length from)) default from)
(match-end 0))))
+ (unless (zerop (length from))
+ (add-to-history query-replace-from-history-variable from nil t))
+ (cons from-string
(query-replace-compile-replacement
- (cdr query-replace-defaults) regexp-flag))
- (add-to-history query-replace-from-history-variable from nil t)
+ to-string regexp-flag)))
+ ;; Just FROM string
+ (unless (eq query-replace-from-history-variable
+ 'query-replace-from-to-history)
+ (add-to-history query-replace-from-history-variable from nil t))
;; Warn if user types \n or \t, but don't reject the input.
(and regexp-flag
(string-match "\\(\\`\\|[^\\]\\)\\(\\\\\\\\\\)*\\(\\\\[nt]\\)"
from)
@@ -216,7 +240,9 @@ (defun query-replace-read-to (from promp
nil nil nil
query-replace-to-history-variable from t)))
(add-to-history query-replace-to-history-variable to nil t)
- (setq query-replace-defaults (cons from to))
+ (add-to-history 'query-replace-from-to-history
+ (concat from query-replace-from-to-separator to)
+ nil t)
to))
regexp-flag))
- Re: History for query replace pairs, (continued)
- Re: History for query replace pairs, Stefan Monnier, 2014/10/21
- Re: History for query replace pairs, Juri Linkov, 2014/10/21
- Re: History for query replace pairs, Stefan Monnier, 2014/10/22
- Re: History for query replace pairs, Artur Malabarba, 2014/10/23
- Re: History for query replace pairs, Juri Linkov, 2014/10/25
- Re: History for query replace pairs, Artur Malabarba, 2014/10/25
- Re: History for query replace pairs, Stefan Monnier, 2014/10/25
- Re: History for query replace pairs, Andreas Schwab, 2014/10/26
- Re: History for query replace pairs,
Juri Linkov <=
- Re: History for query replace pairs, Stefan Monnier, 2014/10/25
- Re: History for query replace pairs, Juri Linkov, 2014/10/26