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bug#9549: 24.0.50; longlines showing hard newlines breaks display


From: Miguel V. S. Frasson
Subject: bug#9549: 24.0.50; longlines showing hard newlines breaks display
Date: Mon, 19 Sep 2011 00:02:14 -0300

Hi.

In longlines-mode, showing hard newlines makes the apparent/displayed
point position to "jump" annoinly.  This bug makes longlines-mode with
longlines-show-hard-newlines useless.

How to reproduce.

1) emacs -Q

2) get some text with some long lines (spaces are necessary).

I do this copying "test " and yanking several times, making several
paragraphs (see recent input below).

3) M-x longlines-mode

4) M-x longlines-show-hard-newlines

5) use arrow keys (up and down) to navigate through the text.

Apparently, when point crosses two C-j, the displayed point goes to
upper right corner (blinks there as it does normally) giving the
impression that point is there.  Sometimes it even "recenters" as if
point where elsewhere.  When (real) point leaves 2 C-j, point behaves
normally.

Regards

Miguel Frasson.


In GNU Emacs 24.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.24.4)
 of 2011-09-18 on frasson-sam11-u
Windowing system distributor `The X.Org Foundation', version 11.0.11001000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: pt_BR.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  longlines-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  use-hard-newlines: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
t e s t SPC C-a C-k C-y C-y C-y C-y C-y C-y C-y C-y 
C-y C-y C-a C-k C-y C-y C-y C-y <return> <return> C-y 
C-y C-y C-y C-y C-y <return> <return> C-y C-y C-y C-y 
C-y C-y C-y <return> <return> C-y C-y C-y C-y C-y C-y 
C-y C-y C-y C-y <return> <return> C-y C-y C-y C-y C-y 
C-y C-y C-y C-y C-y M-x l o n g l i n e s - m o d e 
<return> M-x l o n g l i <tab> s h o <tab> <return> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <help-menu> <send-emacs-bug-report>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark set [47 times]
Longlines mode enabled

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr message format-spec rfc822 mml easymenu
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mailabbrev mail-utils gmm-utils mailheader
emacsbug longlines time-date tooltip ediff-hook vc-hooks lisp-float-type
mwheel x-win x-dnd tool-bar dnd fontset image fringe lisp-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs
button faces cus-face files text-properties overlay sha1 md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)


--
Miguel Vinicius Santini Frasson
address@hidden

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