GNU bug report logs - #17768
24.3; problem with two ruler-mode windows

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Package: emacs;

Reported by: Andrea Rossetti <andrea.rossetti <at> gmail.com>

Date: Thu, 12 Jun 2014 23:59:02 UTC

Severity: normal

Found in version 24.3

Done: Andrea Rossetti <andrea.rossetti <at> gmail.com>

Bug is archived. No further changes may be made.

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From: Andrea Rossetti <andrea.rossetti <at> gmail.com>
To: 17768 <at> debbugs.gnu.org
Subject: bug#17768: 24.3; problem with two ruler-mode windows
Date: Fri, 13 Jun 2014 01:57:20 +0200

Hello,

  I think I found a bug in ruler-mode; a recipe
to reproduce it follows here below; may I please
ask if it's reproducible for you as well.

Start emacs -Q and type:

    M-x ruler-mode RET C-x 3

you will see two side-by-side windows that show the same
scratch buffer. That's normal and expected.

  Now use mouse to adjust the *left* margin of the
*rightside* window (Shift + mouse-1 on the ruler): it does
not work, i.e. clicking has no visible effect. 

Other facts I found:

  - problem doesn't happen in the leftside window, only
    in the rightside one

  - problem doesn't happen if the frame is splitted vertically
    (C-x 2) instead of horizontally

  - problem seems to happen in the rightside window for *all*
    the ruler mouse functions (adjust right margin, drag goal
    column etc.).

  Proposed diagnosys: there could be some error in the ruler's
horizontal offset management (frame-based column vs. window-relative
column).

  The left margin mouse adjustment seems to work properly if
I change the elisp code of file ruler-mode.el, function
ruler-mode-mouse-set-left-margin: 

from

(setq col (- (car (posn-col-row start)) (car (window-edges))
                     (scroll-bar-columns 'left))
...              

into

(setq col (- (car (posn-col-row start)) 
                     (scroll-bar-columns 'left))
...

  That's not a solution, just an attempt to isolate the
problematic code point.

  Thanks for your attention, kindest regards.

  Andrea



In GNU Emacs 24.3.1 (i386-mingw-nt6.1.7600)
 of 2013-03-17 on MARVIN
Windowing system distributor `Microsoft Corp.', version 6.1.7600
Configured using:
 `configure --with-gcc (4.7) --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include
 -ID:/devel/emacs/libs/libiconv-1.13.1-1-dev/include
 -ID:/devel/emacs/libs/libxml2-2.7.8/include/libxml2'

Important settings:
  value of $LANG: ITA
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

Major mode: Text

Minor modes in effect:
  show-paren-mode: t
  server-mode: t
  recentf-mode: t
  cua-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: 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
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x e m a c <tab> b u <tab> <backspace> <backspace> 
r e <tab> <backspace> <S-kp-home> r e p o <tab> r t 
- e m a <tab> <return>

Recent messages:
Loading cua-base...done
Loading gnus...done
Loading recentf...done
Loading server (compiled; note, source file is newer)...done
Loading paren...done
Loading c:/Users/andrea/AppData/Roaming/.recentf...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...

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This bug report was last modified 11 years and 36 days ago.

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