[NTG-pdftex] [ pdftex-Bugs-115 ] character protrusion: some characters will not be protruded

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Bugs item #115, was opened at 2004-09-10 21:57
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Category: hz
Group: v1.20a
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody (None)
Assigned to: The Thanh Han (hanthethanh)
Summary: character protrusion: some characters will not be protruded

Initial Comment:
Some characters will not be protruded into the right
margin, namely: `-', `--', and `---', if entered like
that. When they occur as \hyphenchar, or as a single
character (e.g. \char123), everything's fine. With the
EC fonts, the same happens for some quote characters.

Here's a plain TeX file showing the problem:

----------------------------------------------------
\tracingoutput 1
\showboxbreadth \maxdimen
\showboxdepth \maxdimen
\pdfprotrudechars=2
\hsize10em

\def\testprotrusion#1{#1\dotfill #1\penalty-10000}

\font\testfont=cmr10\testfont

\newcount\charcount
\charcount=0
\loop
   \rpcode\font\charcount=1000
   \advance\charcount 1
   \ifnum\charcount < 256 \repeat

\noindent
\testprotrusion{A}% OK
\testprotrusion{-}%
\testprotrusion{--}%
\testprotrusion{---}%
\testprotrusion{itworks\-likethis}%
\testprotrusion{\char123}%
\testprotrusion{\char124}%

\font\testfont=ecrm10\testfont
\charcount=0
\loop
   \rpcode\font\charcount=1000
   \advance\charcount 1
   \ifnum\charcount < 256 \repeat

\noindent
\testprotrusion{``}%
\testprotrusion{''}%
\testprotrusion{\char13}% \quotedblbase
\testprotrusion{\char18}% \quotesinglbase
\testprotrusion{Z}% OK

\bye 
----------------------------------------------------

I don't know whether that might be related, but in all
cases, something is being inserted between the
character itself and the right margin by TeX (a
discretionary for the dashes, a \kern for the quote
characters). 

(This is the same bug as reported in the dctt thread
`Randausgleich von Binde- und Trennstrich', 29.8.04)

Regards,
Robert.

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>Comment By: Hartmut Henkel (hhenkel)
Date: 2004-09-19 23:39

Message:
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This patch should solve now the problems with character
protrusion, particularily also in combination with font
expansion, see the attached PDF files and the README file.

Have fun! :-)

Hartmut

----------------------------------------------------------------------

Comment By: Hartmut Henkel (hhenkel)
Date: 2004-09-19 17:09

Message:
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still problems with expanded fonts, see PDF

----------------------------------------------------------------------

Comment By: Hartmut Henkel (hhenkel)
Date: 2004-09-19 13:49

Message:
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user_id=929

This patch should work now, see PDF files in the tarball.

----------------------------------------------------------------------

Comment By: Hartmut Henkel (hhenkel)
Date: 2004-09-19 12:42

Message:
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user_id=929

Patch tries to solve the bug. Seems to run with Robert's
example.

----------------------------------------------------------------------

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