GNU bug report logs - #25856
25.1; after-string of overlay may not be displayed

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: ynyaaa <at> gmail.com
Subject: bug#25856: closed (Re: bug#25856: 25.1; after-string of overlay
 may not be displayed)
Date: Fri, 24 Feb 2017 08:36:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#25856: 25.1; after-string of overlay may not be displayed

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 25856 <at> debbugs.gnu.org.

-- 
25856: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=25856
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: ynyaaa <at> gmail.com
Cc: 25856-done <at> debbugs.gnu.org
Subject: Re: bug#25856: 25.1; after-string of overlay may not be displayed
Date: Fri, 24 Feb 2017 10:34:17 +0200

tags 25856 notabug
thanks

> From: ynyaaa <at> gmail.com
> Date: Fri, 24 Feb 2017 15:19:06 +0900
> 
> Evaluating the form below, I expect to see 4 <BeforeAfter>.
> It displays 3 <Before> and 1 <BeforeAfter>.
> If before-string is not specified, 4 <After> are displayed.
> 
> (dotimes (i 4)
>   (let ((p (point)) ol)
>     (insert "<HIDDEN>\n")
>     (setq ol (make-overlay (1+ p) (- (point) 2)))
>     (cond ((= i 0) (overlay-put ol 'display ""))
>           ((= i 1) (overlay-put ol 'invisible t))
>           ((= i 2) (put-text-property (1+ p) (- (point) 2) 'display ""))
>           ((= i 3) (put-text-property (1+ p) (- (point) 2) 'invisible t)))
>     (overlay-put ol 'before-string "Before")
>     (overlay-put ol 'after-string  "After")
>     (overlay-put ol 'evaporate t)))

I don't see any bug here.  You are making text disappear using
different methods, and each one has its implications wrt before- and
after-string.

[Message part 3 (message/rfc822, inline)]

From: ynyaaa <at> gmail.com
To: bug-gnu-emacs <at> gnu.org
Subject: 25.1; after-string of overlay may not be displayed
Date: Fri, 24 Feb 2017 15:19:06 +0900

Evaluating the form below, I expect to see 4 <BeforeAfter>.
It displays 3 <Before> and 1 <BeforeAfter>.
If before-string is not specified, 4 <After> are displayed.

(dotimes (i 4)
  (let ((p (point)) ol)
    (insert "<HIDDEN>\n")
    (setq ol (make-overlay (1+ p) (- (point) 2)))
    (cond ((= i 0) (overlay-put ol 'display ""))
          ((= i 1) (overlay-put ol 'invisible t))
          ((= i 2) (put-text-property (1+ p) (- (point) 2) 'display ""))
          ((= i 3) (put-text-property (1+ p) (- (point) 2) 'invisible t)))
    (overlay-put ol 'before-string "Before")
    (overlay-put ol 'after-string  "After")
    (overlay-put ol 'evaporate t)))




In GNU Emacs 25.1.1 (i686-w64-mingw32)
 of 2016-09-18 built on LAPHROAIG
Windowing system distributor 'Microsoft Corp.', version 6.0.6002
Configured using:
 'configure --host=i686-w64-mingw32 --without-dbus
 --without-compress-install CFLAGS=-static'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS

Important settings:
  value of $LANG: JPN
  locale-coding-system: cp932

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-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
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Auto-saving...done
Mark set
Quit
Mark set [2 times]
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Sending via mail...
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Sending...done

Load-path shadows:
None found.

Features:
(network-stream nsm starttls tls gnutls mailalias smtpmail auth-source
cl-seq eieio byte-opt bytecomp byte-compile cl-extra cconv eieio-core
cl-macs gv misearch multi-isearch pp shadow sort mail-extr emacsbug
message dired format-spec rfc822 mml mml-sec password-cache epg
epg-config gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util help-fns help-mode easymenu cl-loaddefs pcase cl-lib mail-prsvr
mail-utils time-date mule-util japan-util tooltip eldoc electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32 ls-lisp
disp-table w32-win w32-vars term/common-win tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote w32notify w32 multi-tty
make-network-process emacs)

Memory information:
((conses 8 108615 23445)
 (symbols 32 21061 0)
 (miscs 32 97 278)
 (strings 16 20086 4799)
 (string-bytes 1 573995)
 (vectors 8 15202)
 (vector-slots 4 543608 13164)
 (floats 8 208 501)
 (intervals 28 853 85)
 (buffers 520 25))

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