[NTG-context] SVG text alignment issue

[Hans Hagen]

On 6/29/2022 4:35 AM, Aditya Mahajan via ntg-context wrote:
> On Mon, 27 Jun 2022, Thangalin via ntg-context wrote:
> 
>> In the following example, the line and text should be aligned to the
>> middle  when LMTX converts the SVG figure using MP. (Note that you may have
>> to install Roboto, but the font isn't the issue.)
>>
>> % SOF
>> \startbuffer[svg]
>> <svg
>>     width="25mm"
>>     height="70mm"
>>     viewBox="0 0 25 70"
>>     xmlns="http://www.w3.org/2000/svg"
>>     xmlns:svg="http://www.w3.org/2000/svg">
>>    <path
>>       d="m 12.500001,63.971412 v -12.4787"
>>       id="path2"
>>       style="fill:none;fill-opacity:1;stroke:#000000;stroke-opacity:1" />
>>    <text
>>       x="-48.831322"
>>       y="15.60547"
>>       id="text4933-8-6"
>>       transform="rotate(-90)"
>>
>>   style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;font-family:Roboto;-inkscape-font-specification:'Roboto,
>> Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal"><tspan
>>         id="tspan159594-1"
>>         x="-48.831322"
>>         y="15.60547"
>>
>>   style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;font-family:Roboto;-inkscape-font-specification:'Roboto,
>> Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal">16p13.3</tspan></text>
>> </svg>
>> \stopbuffer
>>
>> \starttext
>>     \placefigure[]{}{\includesvgbuffer[svg][conversion=mp]}
>> \stoptext
>> % EOF
> 
> This has nothing to do with SVG. Looking at the definition of \includesvgbuffer, here is a simpler example illustrating the issue:
> 
>      \starttext
>      \startplacefigure[location=here, title={Test}]
>        \dontleavehmode\begingroup
>        \startMPcode
>          draw fullcircle scaled 2cm;
>        \stopMPcode\endgroup
>      \stopplacefigure
>      \stoptext
> 
> One way to "fix" the alignment is to wrap everything in an hbox:
> 
> 
>     \placefigure[]{}{\hbox{\includesvgbuffer[svg][conversion=mp]}}
> 
> Maybe there is a simple way to modify the definition of includesvgbuffer so that an \hbox is not needed.
Thanks for checking it. Can you test with

\pushoverloadmode \unprotect

\permanent\tolerant\protected\def\includesvgfile[#1]#*[#2]%
   {\hbox\bgroup % no \dontleavehmode
    \getdummyparameters[\c!offset=\zeropoint,#2]%
    \clf_includesvgfile{#1}\dimexpr\dummyparameter\c!offset\relax
    \egroup}

\permanent\tolerant\protected\def\includesvgbuffer[#1]#*[#2]%
   {\hbox\bgroup % no \dontleavehmode
    \getdummyparameters[\c!offset=\zeropoint,#2]%
    \clf_includesvgbuffer{#1}\dimexpr\dummyparameter\c!offset\relax
    \egroup}

\protect \popoverloadmode

Hans



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