From: Shynur Xie <one.last.kiss@outlook.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: "63089@debbugs.gnu.org" <63089@debbugs.gnu.org>
Subject: bug#63089: [PATCH] Display offscreen matched openparen
Date: Fri, 28 Apr 2023 12:36:03 +0000 [thread overview]
Message-ID: <SA0PR04MB7433EA61E4194F813DE14859D76B9@SA0PR04MB7433.namprd04.prod.outlook.com> (raw)
In-Reply-To: <834jp0seoq.fsf@gnu.org>
[-- Attachment #1: Type: text/plain, Size: 1257 bytes --]
> From: Eli Zaretskii
> Subject: bug#63089: [PATCH] Display offscreen matched openparen
> Date: Fri, 28 Apr 2023 09:28:53 +0300
> To: Shynur Xie
>
> please add a user option to enable this behavior.
I think it can be defcustomed in file "lisp/paren.el". New version of
the patch is complete, please see the attached.
> don't unnecessarily introduce whitespace differences into the code
Got it.
> Why not use the 'shadow' face instead?
Thanks. Have used the face 'shadow'.
> The original code didn't use backticks, so why do you need it in the
> new version?
My _original_ modification made some lines too long with `list' and
`cons', so I used all backticks in that function. Since there's no
such problem in the subsequent modifications, I will use `list' and
`cons' if you think backticks are unnecessary (or weird).
>> + (1+openparen-idx (1+ openparen-idx)))
> ^^^^^^^^^^^^^^^
> This is a strange and confusing notation, please find a better name
> for this variable.
Have changed it to 'openparen-next-char-idx'.
> What is the status of your legal paperwork?
My assignment process with the FSF is complete.
Thanks again for your review of my patch!
--
shynur
[-- Attachment #2: 0001-Display-offscreen-matched-openparen.patch --]
[-- Type: application/octet-stream, Size: 6207 bytes --]
From 8644fa78a05ffe9a06d611dae0d4d45a413a34a0 Mon Sep 17 00:00:00 2001
From: Shynur <one.last.kiss@outlook.com>
Date: Fri, 28 Apr 2023 20:23:16 +0800
Subject: [PATCH] Display offscreen matched openparen
Propertize the matched openparen displayed in the echo area in order to make
it prominent; use light font for non-context characters (i.e., 'Matches').
* lisp/simple.el (blink-matching-open): Set face shadow for 'Matches'.
* lisp/simple.el (blink-paren-open-paren-line-string): Propertize the macthed
openparen's face by user option `show-paren-openparen-face-in-message'.
* lisp/paren.el (show-paren-openparen-face-in-message): Add a user option
which determines the face of the matched offscreen openparen shown in the
echo area.
---
lisp/paren.el | 8 ++++++
lisp/simple.el | 68 ++++++++++++++++++++++++++++++++++----------------
2 files changed, 55 insertions(+), 21 deletions(-)
diff --git a/lisp/paren.el b/lisp/paren.el
index 4c91fd29490..b9ce3cbd45d 100644
--- a/lisp/paren.el
+++ b/lisp/paren.el
@@ -81,6 +81,14 @@ show-paren-when-point-in-periphery
:type 'boolean
:version "25.1")
+(defcustom show-paren-openparen-face-in-message '(:foreground "green")
+ "Set face for the matched offscreen openparen shown in the echo area.
+By default, the line containing the matched offscreen openparen is
+shown in the echo area, where the openparen's face will be propertized
+by this option."
+ :type '(choice face sexp (const nil))
+ :version "30.0")
+
(defcustom show-paren-highlight-openparen t
"Non-nil turns on openparen highlighting when matching forward.
When nil, and point stands just before an open paren, the paren
diff --git a/lisp/simple.el b/lisp/simple.el
index b621e1603bd..997c600b6b6 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -9312,47 +9312,73 @@ blink-matching-open
(delete-overlay blink-matching--overlay)))))
((not show-paren-context-when-offscreen)
(minibuffer-message
- "Matches %s"
- (substring-no-properties
- (blink-paren-open-paren-line-string blinkpos))))))))
+ #("Matches %s"
+ ;; Make the following text (i.e., %s) prominent.
+ 0 7 (face shadow))
+ (blink-paren-open-paren-line-string blinkpos)))))))
(defun blink-paren-open-paren-line-string (pos)
- "Return the line string that contains the openparen at POS."
+ "Return the line string that contains the openparen at POS.
+Remove the line string's properties but give the openparen a face."
(save-excursion
(goto-char pos)
;; Capture the regions in terms of (beg . end) conses whose
;; buffer-substrings we want to show as a context string. Ensure
;; they are font-locked (bug#59527).
- (let (regions)
- ;; Show what precedes the open in its line, if anything.
+ (let (regions
+ openparen-idx)
(cond
+ ;; Show what precedes the open in its line, if anything.
((save-excursion (skip-chars-backward " \t") (not (bolp)))
- (setq regions (list (cons (line-beginning-position)
- (1+ pos)))))
+ (let ((bol (line-beginning-position)))
+ (setq regions `((,bol . ,(1+ pos)))
+ openparen-idx (- pos bol))))
;; Show what follows the open in its line, if anything.
((save-excursion
(forward-char 1)
(skip-chars-forward " \t")
(not (eolp)))
- (setq regions (list (cons pos (line-end-position)))))
+ (setq regions `((,pos . ,(line-end-position)))
+ openparen-idx 0))
;; Otherwise show the previous nonblank line,
;; if there is one.
((save-excursion (skip-chars-backward "\n \t") (not (bobp)))
- (setq regions (list (cons (progn
- (skip-chars-backward "\n \t")
- (line-beginning-position))
- (progn (end-of-line)
- (skip-chars-backward " \t")
- (point)))
- (cons pos (1+ pos)))))
+ (setq regions `((,(let (bol)
+ (skip-chars-backward "\n \t")
+ (setq bol (line-beginning-position)
+ openparen-idx (- bol))
+ bol)
+ . ,(let (eol)
+ (end-of-line)
+ (skip-chars-backward " \t")
+ (setq eol (point)
+ openparen-idx (+ openparen-idx
+ eol
+ ;; (length "...")
+ 3))
+ eol))
+ (,pos . ,(1+ pos)))))
;; There is nothing to show except the char itself.
- (t (setq regions (list (cons pos (1+ pos))))))
+ (t (setq regions `((,pos . ,(1+ pos)))
+ openparen-idx 0)))
;; Ensure we've font-locked the context region.
(font-lock-ensure (caar regions) (cdar (last regions)))
- (mapconcat (lambda (region)
- (buffer-substring (car region) (cdr region)))
- regions
- "..."))))
+ (let ((line-string
+ (mapconcat
+ (lambda (region)
+ (buffer-substring (car region) (cdr region)))
+ regions
+ "..."))
+ (openparen-next-char-idx (1+ openparen-idx)))
+ (setq line-string (substring-no-properties line-string))
+ (concat
+ (substring line-string
+ 0 openparen-idx)
+ (propertize (substring line-string
+ openparen-idx openparen-next-char-idx)
+ 'face show-paren-openparen-face-in-message)
+ (substring line-string
+ openparen-next-char-idx))))))
(defvar blink-paren-function 'blink-matching-open
"Function called, if non-nil, whenever a close parenthesis is inserted.
--
2.34.1
next prev parent reply other threads:[~2023-04-28 12:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-26 13:39 bug#63089: [PATCH] Display offscreen matched openparen Shynur Xie
2023-04-28 6:28 ` Eli Zaretskii
2023-04-28 12:36 ` Shynur Xie [this message]
2023-04-29 11:05 ` Eli Zaretskii
2023-04-30 10:09 ` Shynur Xie
2023-05-01 13:17 ` Eli Zaretskii
2023-05-01 17:52 ` Shynur Xie
2023-05-02 18:38 ` Eli Zaretskii
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