From: Damien Cassou <damien@cassou.me>
To: Nicolas Petton <nicolas@petton.fr>,
Emacs developers <emacs-devel@gnu.org>
Subject: Re: Emacs master commit: "Add current-line in simple.el" - Wrong commit log?
Date: Mon, 03 Jul 2017 09:03:12 +0200 [thread overview]
Message-ID: <871spyhuj3.fsf@cassou.me> (raw)
In-Reply-To: <87h8yzt26o.fsf@petton.fr>
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Nicolas Petton <nicolas@petton.fr> writes:
> Why not simply `absolute' instead of `absolute-p'. It's not a
> predicate, is it?
fixed.
--
Damien Cassou
http://damiencassou.seasidehosting.st
"Success is the ability to go from one failure to another without
losing enthusiasm." --Winston Churchill
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From c9c50d91f19de77577c95e610420ee8e9622efeb Mon Sep 17 00:00:00 2001
From: Damien Cassou <damien@cassou.me>
Date: Sun, 9 Apr 2017 12:46:57 +0200
Subject: [PATCH] Add absolute optional parameter to line-number-at-pos
(Bug#26417)
* lisp/simple.el (line-number-at-pos): Add a second optional
argument 'absolute'.
* test/list/simple-tests.el: Add tests for 'line-number-at-pos'.
---
doc/lispref/positions.texi | 11 ++++++++---
etc/NEWS | 7 +++++++
lisp/simple.el | 29 ++++++++++++++++-----------
test/lisp/simple-tests.el | 49 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 82 insertions(+), 14 deletions(-)
diff --git a/doc/lispref/positions.texi b/doc/lispref/positions.texi
index 7c30fe9..5e1e92f 100644
--- a/doc/lispref/positions.texi
+++ b/doc/lispref/positions.texi
@@ -432,11 +432,16 @@ Text Lines
in the buffer, or in the region if the region is active.
@end deffn
-@defun line-number-at-pos &optional pos
+@defun line-number-at-pos &optional pos absolute
@cindex line number
This function returns the line number in the current buffer
-corresponding to the buffer position @var{pos}. If @var{pos} is @code{nil}
-or omitted, the current buffer position is used.
+corresponding to the buffer position @var{pos}. If @var{pos} is
+@code{nil} or omitted, the current buffer position is used. If
+@var{absolute} is @code{nil}, the default, counting starts at
+@code{(point-min)}, so the value refers to the contents of the
+accessible portion of the (potentially narrowed) buffer. If
+@var{absolute} is non-@code{nil}, ignore any narrowing and return
+the absolute line number.
@end defun
@ignore
diff --git a/etc/NEWS b/etc/NEWS
index 78d37484..68cc686 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1187,6 +1187,13 @@ or its files before 'delete-directory' gets to them.
*** New error type 'user-search-failed' like 'search-failed' but
avoids debugger like 'user-error'.
++++
+** The function 'line-number-at-pos' now takes a second optional
+argument 'absolute'. If this parameter is nil, the default, this
+function keeps on returning the line number taking potential narrowing
+into account. If this parameter is non-nil, the function ignores
+narrowing and returns the absolute line number.
+
** Changes in Frame- and Window- Handling
+++
diff --git a/lisp/simple.el b/lisp/simple.el
index a5565ab..e3b7665 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -1270,18 +1270,25 @@ (defun count-lines (start end)
done)))
(- (buffer-size) (forward-line (buffer-size)))))))
-(defun line-number-at-pos (&optional pos)
- "Return (narrowed) buffer line number at position POS.
+(defun line-number-at-pos (&optional pos absolute)
+ "Return buffer line number at position POS.
If POS is nil, use current buffer location.
-Counting starts at (point-min), so the value refers
-to the contents of the accessible portion of the buffer."
- (let ((opoint (or pos (point))) start)
- (save-excursion
- (goto-char (point-min))
- (setq start (point))
- (goto-char opoint)
- (forward-line 0)
- (1+ (count-lines start (point))))))
+
+If ABSOLUTE is nil, the default, counting starts
+at (point-min), so the value refers to the contents of the
+accessible portion of the (potentially narrowed) buffer. If
+ABSOLUTE is non-nil, ignore any narrowing and return the
+absolute line number."
+ (save-restriction
+ (when absolute
+ (widen))
+ (let ((opoint (or pos (point))) start)
+ (save-excursion
+ (goto-char (point-min))
+ (setq start (point))
+ (goto-char opoint)
+ (forward-line 0)
+ (1+ (count-lines start (point)))))))
(defun what-cursor-position (&optional detail)
"Print info on cursor position (on screen and within buffer).
diff --git a/test/lisp/simple-tests.el b/test/lisp/simple-tests.el
index 180dcc0..ad7aee1 100644
--- a/test/lisp/simple-tests.el
+++ b/test/lisp/simple-tests.el
@@ -448,5 +448,54 @@ (ert-deftest eval-expression-print-format-large-int-echo ()
(call-interactively #'eval-expression)
(should (equal (current-message) "66 (#o102, #x42, ?B)"))))))
+(ert-deftest line-number-at-pos-in-widen-buffer ()
+ (let ((target-line 3))
+ (with-temp-buffer
+ (insert "a\nb\nc\nd\n")
+ (goto-char (point-min))
+ (forward-line (1- target-line))
+ (should (equal (line-number-at-pos) target-line))
+ (should (equal (line-number-at-pos nil t) target-line)))))
+
+(ert-deftest line-number-at-pos-in-narrow-buffer ()
+ (let ((target-line 3))
+ (with-temp-buffer
+ (insert "a\nb\nc\nd\n")
+ (goto-char (point-min))
+ (forward-line (1- target-line))
+ (narrow-to-region (line-beginning-position) (line-end-position))
+ (should (equal (line-number-at-pos) 1))
+ (should (equal (line-number-at-pos nil t) target-line)))))
+
+(ert-deftest line-number-at-pos-keeps-restriction ()
+ (with-temp-buffer
+ (insert "a\nb\nc\nd\n")
+ (goto-char (point-min))
+ (forward-line 2)
+ (narrow-to-region (line-beginning-position) (line-end-position))
+ (should (equal (line-number-at-pos) 1))
+ (line-number-at-pos nil t)
+ (should (equal (line-number-at-pos) 1))))
+
+(ert-deftest line-number-at-pos-keeps-point ()
+ (let (pos)
+ (with-temp-buffer
+ (insert "a\nb\nc\nd\n")
+ (goto-char (point-min))
+ (forward-line 2)
+ (setq pos (point))
+ (line-number-at-pos)
+ (line-number-at-pos nil t)
+ (should (equal pos (point))))))
+
+(ert-deftest line-number-at-pos-when-passing-point ()
+ (let (pos)
+ (with-temp-buffer
+ (insert "a\nb\nc\nd\n")
+ (should (equal (line-number-at-pos 1) 1))
+ (should (equal (line-number-at-pos 3) 2))
+ (should (equal (line-number-at-pos 5) 3))
+ (should (equal (line-number-at-pos 7) 4)))))
+
(provide 'simple-test)
;;; simple-test.el ends here
--
2.9.4
next prev parent reply other threads:[~2017-07-03 7:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-19 12:12 Emacs master commit: "Add current-line in simple.el" - Wrong commit log? Kaushal Modi
2017-06-19 12:41 ` Nicolas Petton
2017-06-19 13:58 ` Kaushal Modi
2017-06-19 12:42 ` Nicolas Petton
2017-06-24 7:35 ` Damien Cassou
2017-06-29 12:21 ` Nicolas Petton
2017-07-03 7:03 ` Damien Cassou [this message]
2017-07-03 12:45 ` Nicolas Petton
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