wrong vertical spacing in latest beta

wrong vertical spacing in latest beta

[Pablo Rodriguez]

Hans,

this sample:

    \showgrid
    \setupbodyfont[30pt]
    \starttext
    {\tfa\setupinterlinespace \ConTeXt\par}\\
    {\tfxx\setupinterlinespace Author\par}\\
    {\tfxx\setupinterlinespace\currentdate\par}\\
    {\tf\setupinterlinespace url\par}
    \stoptext

With either latest beta or beta from  2015.03.25 22:13, last line in the
sample is on grid line number 3.

With stable beta from TL14 (2014.05.21 22:04), last line from sample is
after grid line 6.

I’m afraid it might be a bug.

Many thanks for your help,

Pablo
-- 
http://www.ousia.tk
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Re: wrong vertical spacing in latest beta

[Hans Hagen]

On 4/16/2015 6:50 PM, Pablo Rodriguez wrote:
> Hans,
>
> this sample:
>
>      \showgrid
>      \setupbodyfont[30pt]
>      \starttext
>      {\tfa\setupinterlinespace \ConTeXt\par}\\
>      {\tfxx\setupinterlinespace Author\par}\\
>      {\tfxx\setupinterlinespace\currentdate\par}\\
>      {\tf\setupinterlinespace url\par}
>      \stoptext
>
> With either latest beta or beta from  2015.03.25 22:13, last line in the
> sample is on grid line number 3.
>
> With stable beta from TL14 (2014.05.21 22:04), last line from sample is
> after grid line 6.
>
> I’m afraid it might be a bug.

hm, more likely a fix (prevdepth or so)

\startbuffer[a]
     \ruledvbox{x\tfa \setupinterlinespace \strut \ConTeXt     \par 
\strut x\par}\blank
     \ruledvbox{x\tfxx\setupinterlinespace \strut Author       \par 
\strut x\par}\blank
     \ruledvbox{x\tfxx\setupinterlinespace \strut \currentdate \par 
\strut x\par}\blank
     \ruledvbox{x\tf  \setupinterlinespace \strut url          \par 
\strut x\par}\blank
\stopbuffer

\startbuffer[b]
     \ruledvbox{x\tfa \setupinterlinespace        \ConTeXt     \par 
x\par}\blank
     \ruledvbox{x\tfxx\setupinterlinespace        Author       \par 
x\par}\blank
     \ruledvbox{x\tfxx\setupinterlinespace        \currentdate \par 
x\par}\blank
     \ruledvbox{x\tf  \setupinterlinespace        url          \par 
x\par}\blank
\stopbuffer

\starttext
     \showstruts
     \getbuffer[a]
     \page
     \getbuffer[b]
\stoptext

you can use use \begstrut ... \endstrut in such local situations

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | 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
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___________________________________________________________________________________

Re: wrong vertical spacing in latest beta

[Pablo Rodriguez]

On 04/16/2015 09:51 PM, Hans Hagen wrote:
> On 4/16/2015 6:50 PM, Pablo Rodriguez wrote:
>> [...]
>> I’m afraid it might be a bug.
> 
> hm, more likely a fix (prevdepth or so)
> 
> \startbuffer[a]
>      \ruledvbox{x\tfa \setupinterlinespace \strut \ConTeXt     \par 
> \strut x\par}\blank
>      \ruledvbox{x\tfxx\setupinterlinespace \strut Author       \par 
> \strut x\par}\blank
>      \ruledvbox{x\tfxx\setupinterlinespace \strut \currentdate \par 
> \strut x\par}\blank
>      \ruledvbox{x\tf  \setupinterlinespace \strut url          \par 
> \strut x\par}\blank
> \stopbuffer
> 
> \startbuffer[b]
>      \ruledvbox{x\tfa \setupinterlinespace        \ConTeXt     \par 
> x\par}\blank
>      \ruledvbox{x\tfxx\setupinterlinespace        Author       \par 
> x\par}\blank
>      \ruledvbox{x\tfxx\setupinterlinespace        \currentdate \par 
> x\par}\blank
>      \ruledvbox{x\tf  \setupinterlinespace        url          \par 
> x\par}\blank
> \stopbuffer
> 
> \starttext
>      \showstruts
>      \getbuffer[a]
>      \page
>      \getbuffer[b]
> \stoptext
> 
> you can use use \begstrut ... \endstrut in such local situations

Many thanks for your help, Hans.

I have seen strut in the past, but I’m afraid that I don’t know what it
may be or what I can use it for (besides your sample).

Many thanks for your help,


Pablo
-- 
http://www.ousia.tk
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___________________________________________________________________________________

Re: wrong vertical spacing in latest beta

[Hans Hagen]

On 4/16/2015 10:20 PM, Pablo Rodriguez wrote:
> On 04/16/2015 09:51 PM, Hans Hagen wrote:
>> On 4/16/2015 6:50 PM, Pablo Rodriguez wrote:
>>> [...]
>>> I’m afraid it might be a bug.
>>
>> hm, more likely a fix (prevdepth or so)
>>
>> \startbuffer[a]
>>       \ruledvbox{x\tfa \setupinterlinespace \strut \ConTeXt     \par
>> \strut x\par}\blank
>>       \ruledvbox{x\tfxx\setupinterlinespace \strut Author       \par
>> \strut x\par}\blank
>>       \ruledvbox{x\tfxx\setupinterlinespace \strut \currentdate \par
>> \strut x\par}\blank
>>       \ruledvbox{x\tf  \setupinterlinespace \strut url          \par
>> \strut x\par}\blank
>> \stopbuffer
>>
>> \startbuffer[b]
>>       \ruledvbox{x\tfa \setupinterlinespace        \ConTeXt     \par
>> x\par}\blank
>>       \ruledvbox{x\tfxx\setupinterlinespace        Author       \par
>> x\par}\blank
>>       \ruledvbox{x\tfxx\setupinterlinespace        \currentdate \par
>> x\par}\blank
>>       \ruledvbox{x\tf  \setupinterlinespace        url          \par
>> x\par}\blank
>> \stopbuffer
>>
>> \starttext
>>       \showstruts
>>       \getbuffer[a]
>>       \page
>>       \getbuffer[b]
>> \stoptext
>>
>> you can use use \begstrut ... \endstrut in such local situations
>
> Many thanks for your help, Hans.
>
> I have seen strut in the past, but I’m afraid that I don’t know what it
> may be or what I can use it for (besides your sample).

tex has no built-in concept of lineheight and depth only of distance

so, if you want consistency you need to make sure the first line has 
height and the last line depth

for normal running text this goes ok (thanks to baselineskip being the 
sum of wanted height and depth)

but ... as soon as you start boxing you need to make sure you enforce 
the proper ht and dp is needed

\begstrut ... \endstrut

can be used for that

most mechanisnm in context deal with this themselves (for instance 
framed and tables .. tables would look horrible otherwise)

(try \showstruts before \starttext so see where \struts are used)

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | 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
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wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: wrong vertical spacing in latest beta

[Pablo Rodriguez]

On 04/16/2015 10:38 PM, Hans Hagen wrote:
> On 4/16/2015 10:20 PM, Pablo Rodriguez wrote:
>> On 04/16/2015 09:51 PM, Hans Hagen wrote:
>> [...]
>> I have seen strut in the past, but I’m afraid that I don’t know what it
>> may be or what I can use it for (besides your sample).
> 
> tex has no built-in concept of lineheight and depth only of distance
> 
> so, if you want consistency you need to make sure the first line has 
> height and the last line depth
> 
> for normal running text this goes ok (thanks to baselineskip being the 
> sum of wanted height and depth)
> 
> but ... as soon as you start boxing you need to make sure you enforce 
> the proper ht and dp is needed
> 
> \begstrut ... \endstrut
> 
> can be used for that
> 
> most mechanisnm in context deal with this themselves (for instance 
> framed and tables .. tables would look horrible otherwise)
> 
> (try \showstruts before \starttext so see where \struts are used)

Many thanks for your explanation, Hans.


Pablo
-- 
http://www.ousia.tk
___________________________________________________________________________________
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
___________________________________________________________________________________