Package: emacs;
Reported by: Juri Linkov <juri <at> jurta.org>
Date: Wed, 15 May 2013 00:02:01 UTC
Severity: wishlist
Found in version 24.3.50
Done: Juri Linkov <juri <at> jurta.org>
Bug is archived. No further changes may be made.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Juri Linkov <juri <at> jurta.org> To: bug-gnu-emacs <at> gnu.org Subject: 24.3.50; read-regexp-defaults-function Date: Wed, 15 May 2013 02:51:20 +0300
This is a continuation from bug#13892 and bug#13687
closed and archived two months ago. As the unfinished
discussion indicates there are pending enhancements
to create a single option to define the same defaulting
behavior for all regexp-reading commands and to group
the existing defaults to separate functions that can be
overridden by customizing that option.
This is a preliminary implementation:
=== modified file 'lisp/replace.el'
--- lisp/replace.el 2013-04-22 04:17:30 +0000
+++ lisp/replace.el 2013-05-14 23:50:29 +0000
@@ -580,6 +580,41 @@ (defvar regexp-history nil
(defvar occur-collect-regexp-history '("\\1")
"History of regexp for occur's collect operation")
+(defcustom read-regexp-defaults-function nil
+ "Function that provides default regexp(s) for regexp reading commands.
+This function should take no arguments and return one of nil, a
+regexp or a list of regexps. The return value of this function is used
+as DEFAULTS param of `read-regexp'. This function is called only during
+interactive use.
+
+You can customize `read-regexp-defaults-function' to the value
+`find-tag-default-as-regexp' to highlight a symbol at point."
+ :type '(choice
+ (const :tag "No default regexp reading function" nil)
+ (choice :tag "Function to provide default for read-regexp"
+ (function-item :tag "Tag at point" find-tag-default)
+ (function-item :tag "Symbol at point" find-tag-default-as-regexp)
+ (function-item :tag "Latest history" (lambda () (car regexp-history)))
+ function))
+ :group 'matching
+ :version "24.4")
+
+(defun read-regexp-defaults ()
+ (if (functionp read-regexp-defaults-function)
+ (funcall read-regexp-defaults-function)))
+
+(defun read-regexp-defaults-history ()
+ "Return the latest regexp from `regexp-history'.
+See `read-regexp-defaults-function' for details."
+ (or (read-regexp-defaults)
+ (car regexp-history)))
+
+(defun read-regexp-defaults-tag ()
+ "Return the regexp that matches the default tag at point.
+See `read-regexp-defaults-function' for details."
+ (or (read-regexp-defaults)
+ (find-tag-default-as-regexp)))
+
(defun read-regexp (prompt &optional defaults history)
"Read and return a regular expression as a string.
When PROMPT doesn't end with a colon and space, it adds a final \": \".
@@ -636,7 +671,7 @@ (defun keep-lines-read-args (prompt)
"Read arguments for `keep-lines' and friends.
Prompt for a regexp with PROMPT.
Value is a list, (REGEXP)."
- (list (read-regexp prompt) nil nil t))
+ (list (read-regexp prompt (read-regexp-defaults-history)) nil nil t))
(defun keep-lines (regexp &optional rstart rend interactive)
"Delete all lines except those containing matches for REGEXP.
@@ -1143,32 +1178,35 @@ (defcustom occur-excluded-properties
:group 'matching
:version "22.1")
-(defvar occur-read-regexp-defaults-function
- 'occur-read-regexp-defaults
+(defun occur-read-regexp-defaults ()
"Function that provides default regexp(s) for occur commands.
-This function should take no arguments and return one of nil, a
+This function takes no arguments and returns one of nil, a
regexp or a list of regexps for use with occur commands -
`occur', `multi-occur' and `multi-occur-in-matching-buffers'.
The return value of this function is used as DEFAULTS param of
`read-regexp' while executing the occur command. This function
is called only during interactive use.
-For example, to check for occurrence of symbol at point use
-
- \(setq occur-read-regexp-defaults-function
- 'find-tag-default-as-regexp\).")
-
-(defun occur-read-regexp-defaults ()
- "Return the latest regexp from `regexp-history'.
-See `occur-read-regexp-defaults-function' for details."
- (car regexp-history))
+You can customize `read-regexp-defaults-function' to the value
+`find-tag-default-as-regexp' to highlight a symbol at point."
+ (read-regexp-defaults-history))
+
+(defun occur-collect-read-regexp-defaults ()
+ "Return the latest regexp from `occur-collect-regexp-history'.
+This function is used to read a regexp to collect.
+See `read-regexp-defaults-function' for details.
+
+You can customize `read-regexp-defaults-function' to the value
+`find-tag-default-as-regexp' to highlight a symbol at point."
+ (or (read-regexp-defaults)
+ (car occur-collect-regexp-history)))
(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")
- (funcall occur-read-regexp-defaults-function))))
+ (occur-read-regexp-defaults))))
(list regexp
(if perform-collect
;; Perform collect operation
@@ -1176,7 +1214,7 @@ (defun occur-read-primary-args ()
;; No subexpression so collect the entire match.
"\\&"
;; Get the regexp for collection pattern.
- (let ((default (car occur-collect-regexp-history)))
+ (let ((default (occur-collect-read-regexp-defaults)))
(read-regexp
(format "Regexp to collect (default %s): " default)
default 'occur-collect-regexp-history)))
=== modified file 'lisp/hi-lock.el'
--- lisp/hi-lock.el 2013-04-22 04:17:30 +0000
+++ lisp/hi-lock.el 2013-05-14 23:50:37 +0000
@@ -279,26 +279,6 @@ (defvar hi-lock-map
map)
"Key map for hi-lock.")
-(defvar hi-lock-read-regexp-defaults-function
- 'hi-lock-read-regexp-defaults
- "Function that provides default regexp(s) for highlighting commands.
-This function should take no arguments and return one of nil, a
-regexp or a list of regexps for use with highlighting commands -
-`hi-lock-face-phrase-buffer', `hi-lock-line-face-buffer' and
-`hi-lock-face-buffer'. The return value of this function is used
-as DEFAULTS param of `read-regexp' while executing the
-highlighting command. This function is called only during
-interactive use.
-
-For example, to highlight at symbol at point use
-
- \(setq hi-lock-read-regexp-defaults-function
- 'find-tag-default-as-regexp\)
-
-If you need different defaults for different highlighting
-operations, use `this-command' to identify the command under
-execution.")
-
;; Visible Functions
;;;###autoload
@@ -422,7 +402,7 @@ (defalias 'highlight-lines-matching-rege
(defun hi-lock-line-face-buffer (regexp &optional face)
"Set face of all lines containing a match of REGEXP to FACE.
Interactively, prompt for REGEXP then FACE. Use
-`hi-lock-read-regexp-defaults-function' to retrieve default
+`hi-lock-read-regexp-defaults' to retrieve default
value(s) of REGEXP. Use the global history list for FACE.
Use Font lock mode, if enabled, to highlight REGEXP. Otherwise,
@@ -432,7 +412,7 @@ (defun hi-lock-line-face-buffer (regexp
(list
(hi-lock-regexp-okay
(read-regexp "Regexp to highlight line"
- (funcall hi-lock-read-regexp-defaults-function)))
+ (hi-lock-read-regexp-defaults)))
(hi-lock-read-face-name)))
(or (facep face) (setq face 'hi-yellow))
(unless hi-lock-mode (hi-lock-mode 1))
@@ -448,7 +428,7 @@ (defalias 'highlight-regexp 'hi-lock-fac
(defun hi-lock-face-buffer (regexp &optional face)
"Set face of each match of REGEXP to FACE.
Interactively, prompt for REGEXP then FACE. Use
-`hi-lock-read-regexp-defaults-function' to retrieve default
+`hi-lock-read-regexp-defaults' to retrieve default
value(s) REGEXP. Use the global history list for FACE.
Use Font lock mode, if enabled, to highlight REGEXP. Otherwise,
@@ -458,7 +438,7 @@ (defun hi-lock-face-buffer (regexp &opti
(list
(hi-lock-regexp-okay
(read-regexp "Regexp to highlight"
- (funcall hi-lock-read-regexp-defaults-function)))
+ (hi-lock-read-regexp-defaults)))
(hi-lock-read-face-name)))
(or (facep face) (setq face 'hi-yellow))
(unless hi-lock-mode (hi-lock-mode 1))
@@ -470,7 +450,7 @@ (defalias 'highlight-phrase 'hi-lock-fac
(defun hi-lock-face-phrase-buffer (regexp &optional face)
"Set face of each match of phrase REGEXP to FACE.
Interactively, prompt for REGEXP then FACE. Use
-`hi-lock-read-regexp-defaults-function' to retrieve default
+`hi-lock-read-regexp' to retrieve default
value(s) of REGEXP. Use the global history list for FACE. When
called interactively, replace whitespace in user provided regexp
with arbitrary whitespace and make initial lower-case letters
@@ -484,7 +464,7 @@ (defun hi-lock-face-phrase-buffer (regex
(hi-lock-regexp-okay
(hi-lock-process-phrase
(read-regexp "Phrase to highlight"
- (funcall hi-lock-read-regexp-defaults-function))))
+ (hi-lock-read-regexp-defaults))))
(hi-lock-read-face-name)))
(or (facep face) (setq face 'hi-yellow))
(unless hi-lock-mode (hi-lock-mode 1))
@@ -651,9 +631,22 @@ (defun hi-lock-regexp-okay (regexp)
regexp))
(defun hi-lock-read-regexp-defaults ()
- "Return the latest regexp from `regexp-history'.
-See `hi-lock-read-regexp-defaults-function' for details."
- (car regexp-history))
+ "Function that provides default regexp(s) for highlighting commands.
+This function takes no arguments and returns one of nil, a
+regexp or a list of regexps for use with highlighting commands -
+`hi-lock-face-phrase-buffer', `hi-lock-line-face-buffer' and
+`hi-lock-face-buffer'. The return value of this function is used
+as DEFAULTS param of `read-regexp' while executing the
+highlighting command. This function is called only during
+interactive use.
+
+You can customize `read-regexp-defaults-function' to the value
+`find-tag-default-as-regexp' to highlight a symbol at point.
+
+If you need different defaults for different highlighting
+operations, redefine this function and use `this-command'
+to identify the command under execution."
+ (read-regexp-defaults-history))
(defun hi-lock-read-face-name ()
"Return face for interactive highlighting.
=== modified file 'lisp/progmodes/grep.el'
--- lisp/progmodes/grep.el 2013-02-12 07:57:04 +0000
+++ lisp/progmodes/grep.el 2013-05-14 23:50:07 +0000
@@ -829,9 +829,13 @@ (defun grep-expand-template (template &o
"")
t t command))))))
+(defun grep-read-regexp-defaults ()
+ (or (read-regexp-defaults)
+ (grep-tag-default)))
+
(defun grep-read-regexp ()
"Read regexp arg for interactive grep."
- (let ((default (grep-tag-default)))
+ (let ((default (grep-read-regexp-defaults)))
(read-regexp
(concat "Search for"
(if (and default (> (length default) 0))
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