From: John Shahid <jvshahid@gmail.com>
To: 31662@debbugs.gnu.org
Subject: bug#31662: [PATCH] fix double counting bug in term.el
Date: Thu, 31 May 2018 04:49:53 +0000 [thread overview]
Message-ID: <87muwgpgy6.fsf@gmail.com> (raw)
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Hi all,
Today I was trying to run fzf[1] in term when I ran into a weird issue
that will cause the term output to be clobbered with certain output. The
root cause seems to be a double counting in the column offset. This is
usually fine, unless `2*len(inserted text)' causes the point to be equal
to the window width. I fixed the issue and added a new test in the
attached patch
[1] https://github.com/junegunn/fzf
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From efeec7bb556084f7004a83faf679f724bb8a0fe8 Mon Sep 17 00:00:00 2001
From: John Shahid <jvshahid@gmail.com>
Date: Wed, 30 May 2018 23:55:16 -0400
Subject: [PATCH] * lisp/term.el (term-emulate-terminal): fix column double
counting
---
lisp/term.el | 3 ++-
test/lisp/term-tests.el | 7 +++++++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/lisp/term.el b/lisp/term.el
index 19e68ddb49..67cebda1be 100644
--- a/lisp/term.el
+++ b/lisp/term.el
@@ -2904,7 +2904,8 @@ term-emulate-terminal
(when (not (or (eobp) term-insert-mode))
(let ((pos (point)))
(term-move-columns columns)
- (delete-region pos (point))))
+ (delete-region pos (point))
+ (term-move-columns (- columns))))
;; In insert mode if the current line
;; has become too long it needs to be
;; chopped off.
diff --git a/test/lisp/term-tests.el b/test/lisp/term-tests.el
index 8aaa61a210..e27dd0354d 100644
--- a/test/lisp/term-tests.el
+++ b/test/lisp/term-tests.el
@@ -89,6 +89,13 @@ term-test-screen-from-input
"\e[2;1Hc"
"\e[1;2Hb"
"\e[1;1Ha") "" t))))
+ (should (equal "abcde j"
+ (term-test-screen-from-input
+ 10 12 (concat "\e[mabcdefghij"
+ "\e[H" ;move back to point-min
+ "\e[mabcde"
+ "\e[m j"))))
+
;; Relative positioning.
(should (equal "ab\ncd"
(term-test-screen-from-input
--
2.17.0
next reply other threads:[~2018-05-31 4:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-31 4:49 John Shahid [this message]
2018-05-31 22:51 ` bug#31662: [PATCH] fix double counting bug in term.el Noam Postavsky
2018-06-01 2:51 ` John Shahid
2018-06-02 2:24 ` Noam Postavsky
2018-06-02 2:43 ` John Shahid
2018-06-02 3:13 ` Noam Postavsky
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