accented letters in mkiv

accented letters in mkiv

[Thomas A. Schmitz]

Hi all,

sorry if this is obvious and I have simply overlooked something. I  
need the character U0113 "emacron." It is not present in the font I  
use. In mkii, I could simply write \=e, and TeX would take care of  
building (faking) the character. When I try this in mkiv, I get an  
error:

error: ...al/texlive/texmf-local/tex/context/base/font-otf.lua:3329:  
attempt to index field '?' (a nil value)

I'm not complaining about this somewhat opaque error message, but I'm  
wondering how I can fake this glyph. There was an older discussion on  
the list which pointed me to char-utf.tex and \definecomposedutf, but  
the file says "This feature is obsolete." So what would be the  
canonical way to build such a character in mkiv?

Thanks a lot, all best

Thomas
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Re: accented letters in mkiv

[Hans Hagen]

Thomas A. Schmitz wrote:
> Hi all,
> 
> sorry if this is obvious and I have simply overlooked something. I  
> need the character U0113 "emacron." It is not present in the font I  
> use. In mkii, I could simply write \=e, and TeX would take care of  
> building (faking) the character. When I try this in mkiv, I get an  
> error:
> 
> error: ...al/texlive/texmf-local/tex/context/base/font-otf.lua:3329:  
> attempt to index field '?' (a nil value)
> 
> I'm not complaining about this somewhat opaque error message, but I'm  
> wondering how I can fake this glyph. There was an older discussion on  
> the list which pointed me to char-utf.tex and \definecomposedutf, but  
> the file says "This feature is obsolete." So what would be the  
> canonical way to build such a character in mkiv?

use the feature:

	combine=yes

maybe you're lucky


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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___________________________________________________________________________________

Re: accented letters in mkiv

[Thomas A. Schmitz]

On May 19, 2008, at 8:04 PM, Hans Hagen wrote:

> use the feature:
>
> 	combine=yes
>
> maybe you're lucky

:-) No such luck, unfortunately. I have now found a post by Taco on a  
similar problem and use this:

\catcode`\ē=\active \def ē{\buildtextaccent\textmacron e}

Works well!

Thomas
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Re: accented letters in mkiv

[Hans Hagen]

Thomas A. Schmitz wrote:
> On May 19, 2008, at 8:04 PM, Hans Hagen wrote:
> 
>> use the feature:
>>
>> 	combine=yes
>>
>> maybe you're lucky
> 
> :-) No such luck, unfortunately. I have now found a post by Taco on a  
> similar problem and use this:
> 
> \catcode`\ē=\active \def ē{\buildtextaccent\textmacron e}
> 
> Works well!

hm, but that will do it for *all* fonts

i have no plans yet to set up a mechanism for that; at some point we 
will have a callback for missing characters and then we can think of 
something more structural

btw, i wonder why combine does not work here


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: accented letters in mkiv

[Hans Hagen]

Thomas A. Schmitz wrote:
> Hi all,
> 
> sorry if this is obvious and I have simply overlooked something. I  
> need the character U0113 "emacron." It is not present in the font I  
> use. In mkii, I could simply write \=e, and TeX would take care of  
> building (faking) the character. When I try this in mkiv, I get an  
> error:
> 
> error: ...al/texlive/texmf-local/tex/context/base/font-otf.lua:3329:  
> attempt to index field '?' (a nil value)

         while next and next.id == glyph and next.subtype<256 and 
next.font == currentfont do
             local cn = characters[next.char]
             if not cn or cn.description.class == 'mark' then
                 prev = next
                 next = next.next
             else

should repair this

> I'm not complaining about this somewhat opaque error message, but I'm  

well, eventually all such errors should go away

makes me wonder ... maybe in addition to combine i should have a 
simplify feature (so that a missing emacron at least gives an e)

Hans


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: accented letters in mkiv

[Hans Hagen]

Thomas A. Schmitz wrote:


can you try compose=yes

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: accented letters in mkiv

[Arthur Reutenauer]

> makes me wonder ... maybe in addition to combine i should have a 
> simplify feature (so that a missing emacron at least gives an e)

  That would be great indeed ... as a very very last resort ;-)

	Arthur
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___________________________________________________________________________________