* copy/paste text broken with certain ligatures
@ 2016-04-14 13:47 Brian R. Landy
2016-04-14 22:24 ` Hans Hagen
0 siblings, 1 reply; 6+ messages in thread
From: Brian R. Landy @ 2016-04-14 13:47 UTC (permalink / raw)
To: ntg-context
Hi, sometime between version 2015.08.05 and 2016.04.10 the handling of
certain ligatures changed (sorry, I don't have intermediate versions to
test with). The issue is the ligatures no longer copy/paste as the
original two characters, which also breaks text searched of the pdf.
Instead they copy as a single glyph.
I'm seeing the problem with "ti" and "fj", while others like "ffi",
"fi", and "ff" are fine in both versions.
I see this using Calibri (other fonts I tried don't support those two
ligatures):
\starttypescript[cleartype]
\definetypeface[\typescriptone][ss][sans][calibri][default]
\stoptypescript
\usetypescript[cleartype]
\setupbodyfont[cleartype,sans,10pt]
\starttext
ffi\par
fi\par
ff\par
fi\par
ti\par
fj\par
\stoptext
Thank you.
Best regards,
Brian
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: copy/paste text broken with certain ligatures
2016-04-14 13:47 copy/paste text broken with certain ligatures Brian R. Landy
@ 2016-04-14 22:24 ` Hans Hagen
2016-04-15 3:39 ` Brian R. Landy
2016-04-15 11:31 ` Ulrike Fischer
0 siblings, 2 replies; 6+ messages in thread
From: Hans Hagen @ 2016-04-14 22:24 UTC (permalink / raw)
To: ntg-context
On 4/14/2016 3:47 PM, Brian R. Landy wrote:
> Hi, sometime between version 2015.08.05 and 2016.04.10 the handling of
> certain ligatures changed (sorry, I don't have intermediate versions to
> test with). The issue is the ligatures no longer copy/paste as the
> original two characters, which also breaks text searched of the pdf.
> Instead they copy as a single glyph.
>
> I'm seeing the problem with "ti" and "fj", while others like "ffi",
> "fi", and "ff" are fine in both versions.
>
> I see this using Calibri (other fonts I tried don't support those two
> ligatures):
>
> \starttypescript[cleartype]
> \definetypeface[\typescriptone][ss][sans][calibri][default]
> \stoptypescript
> \usetypescript[cleartype]
> \setupbodyfont[cleartype,sans,10pt]
> \starttext
> ffi\par
> fi\par
> ff\par
> fi\par
> ti\par
> fj\par
> \stoptext
>
> Thank you.
not all pdf viewers can do that well, unless it's broken, context
outputs the tounicode vectors needed for it
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: copy/paste text broken with certain ligatures
2016-04-14 22:24 ` Hans Hagen
@ 2016-04-15 3:39 ` Brian R. Landy
2016-04-15 11:31 ` Ulrike Fischer
1 sibling, 0 replies; 6+ messages in thread
From: Brian R. Landy @ 2016-04-15 3:39 UTC (permalink / raw)
To: mailing list for ConTeXt users
> On Apr 14, 2016, at 6:24 PM, Hans Hagen <pragma@wxs.nl> wrote:
>
>> On 4/14/2016 3:47 PM, Brian R. Landy wrote:
>> Hi, sometime between version 2015.08.05 and 2016.04.10 the handling of
>> certain ligatures changed (sorry, I don't have intermediate versions to
>> test with). The issue is the ligatures no longer copy/paste as the
>> original two characters, which also breaks text searched of the pdf.
>> Instead they copy as a single glyph.
>>
>> I'm seeing the problem with "ti" and "fj", while others like "ffi",
>> "fi", and "ff" are fine in both versions.
>>
>> I see this using Calibri (other fonts I tried don't support those two
>> ligatures):
>>
>> \starttypescript[cleartype]
>> \definetypeface[\typescriptone][ss][sans][calibri][default]
>> \stoptypescript
>> \usetypescript[cleartype]
>> \setupbodyfont[cleartype,sans,10pt]
>> \starttext
>> ffi\par
>> fi\par
>> ff\par
>> fi\par
>> ti\par
>> fj\par
>> \stoptext
>>
>> Thank you.
>
> not all pdf viewers can do that well, unless it's broken, context outputs the tounicode vectors needed for it
>
> Hans
But Acrobat works fine with the pdf generated by the older version of ConTeXt, which also uses the ligatures. So something must be different about the files generated by the two versions?
I can post examples tomorrow if you'd like.
Thanks,
Brian
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
> -----------------------------------------------------------------
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive : http://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: copy/paste text broken with certain ligatures
2016-04-14 22:24 ` Hans Hagen
2016-04-15 3:39 ` Brian R. Landy
@ 2016-04-15 11:31 ` Ulrike Fischer
2016-04-16 13:22 ` Hans Hagen
1 sibling, 1 reply; 6+ messages in thread
From: Ulrike Fischer @ 2016-04-15 11:31 UTC (permalink / raw)
To: ntg-context
Am Fri, 15 Apr 2016 00:24:26 +0200 schrieb Hans Hagen:
> On 4/14/2016 3:47 PM, Brian R. Landy wrote:
>> Hi, sometime between version 2015.08.05 and 2016.04.10 the handling of
>> certain ligatures changed (sorry, I don't have intermediate versions to
>> test with). The issue is the ligatures no longer copy/paste as the
>> original two characters, which also breaks text searched of the pdf.
>> Instead they copy as a single glyph.
>>
>> I'm seeing the problem with "ti" and "fj", while others like "ffi",
>> "fi", and "ff" are fine in both versions.
>>
> not all pdf viewers can do that well, unless it's broken, context
> outputs the tounicode vectors needed for it
I can't copy the two ligatures either (in Adobe Reader DC), but with
the equivalent latex example (TL2016 pretest) it works fine. So imho
it is not a viewer problem.
--
Ulrike Fischer
http://www.troubleshooting-tex.de/
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: copy/paste text broken with certain ligatures
2016-04-15 11:31 ` Ulrike Fischer
@ 2016-04-16 13:22 ` Hans Hagen
2016-04-18 14:56 ` Brian R. Landy
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen @ 2016-04-16 13:22 UTC (permalink / raw)
To: news3, mailing list for ConTeXt users
On 4/15/2016 1:31 PM, Ulrike Fischer wrote:
> Am Fri, 15 Apr 2016 00:24:26 +0200 schrieb Hans Hagen:
>
>> On 4/14/2016 3:47 PM, Brian R. Landy wrote:
>>> Hi, sometime between version 2015.08.05 and 2016.04.10 the handling of
>>> certain ligatures changed (sorry, I don't have intermediate versions to
>>> test with). The issue is the ligatures no longer copy/paste as the
>>> original two characters, which also breaks text searched of the pdf.
>>> Instead they copy as a single glyph.
>>>
>>> I'm seeing the problem with "ti" and "fj", while others like "ffi",
>>> "fi", and "ff" are fine in both versions.
>>>
>
>
>> not all pdf viewers can do that well, unless it's broken, context
>> outputs the tounicode vectors needed for it
>
> I can't copy the two ligatures either (in Adobe Reader DC), but with
> the equivalent latex example (TL2016 pretest) it works fine. So imho
> it is not a viewer problem.
i looked into it and it's two things combined ...
(1) when we explicitly pass tounicodes luatex mistakenly falls back to
the index (a next release repairs this)
(2) this happens here because calibri lacks the information (no names to
deduce ligature from) .. so, i now have some extra heuristics in the
font loader that get them from the gsub features
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: copy/paste text broken with certain ligatures
2016-04-16 13:22 ` Hans Hagen
@ 2016-04-18 14:56 ` Brian R. Landy
0 siblings, 0 replies; 6+ messages in thread
From: Brian R. Landy @ 2016-04-18 14:56 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Sat, 16 Apr 2016, Hans Hagen wrote:
> On 4/15/2016 1:31 PM, Ulrike Fischer wrote:
>> Am Fri, 15 Apr 2016 00:24:26 +0200 schrieb Hans Hagen:
>>
>>> On 4/14/2016 3:47 PM, Brian R. Landy wrote:
>>>> Hi, sometime between version 2015.08.05 and 2016.04.10 the handling
>>>> of
>>>> certain ligatures changed (sorry, I don't have intermediate
>>>> versions to
>>>> test with). The issue is the ligatures no longer copy/paste as the
>>>> original two characters, which also breaks text searched of the
>>>> pdf.
>>>> Instead they copy as a single glyph.
>>>>
>>>> I'm seeing the problem with "ti" and "fj", while others like "ffi",
>>>> "fi", and "ff" are fine in both versions.
>>>>
>>
>>
>>> not all pdf viewers can do that well, unless it's broken, context
>>> outputs the tounicode vectors needed for it
>>
>> I can't copy the two ligatures either (in Adobe Reader DC), but with
>> the equivalent latex example (TL2016 pretest) it works fine. So imho
>> it is not a viewer problem.
>
> i looked into it and it's two things combined ...
>
> (1) when we explicitly pass tounicodes luatex mistakenly falls back to
> the index (a next release repairs this)
>
> (2) this happens here because calibri lacks the information (no names
> to deduce ligature from) .. so, i now have some extra heuristics in
> the font loader that get them from the gsub features
>
Thank you Hans, this worked perfectly. I appreciate your help with
this! (and thanks, too, for fixing the dash issue I raised recently).
Best regards,
Brian
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
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2016-04-14 13:47 copy/paste text broken with certain ligatures Brian R. Landy
2016-04-14 22:24 ` Hans Hagen
2016-04-15 3:39 ` Brian R. Landy
2016-04-15 11:31 ` Ulrike Fischer
2016-04-16 13:22 ` Hans Hagen
2016-04-18 14:56 ` Brian R. Landy
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