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* XML and math
@ 2019-01-10 21:26 Aditya Mahajan
  2019-01-10 22:00 ` Henri Menke
  2019-01-10 22:08 ` Hans Hagen
  0 siblings, 2 replies; 6+ messages in thread
From: Aditya Mahajan @ 2019-01-10 21:26 UTC (permalink / raw)
  To: mailing list for ConTeXt users

Hi,

I have an XML file (which is generated via a program that I have no 
control over), which contains elements as follows:

          <p>
             <equation text="$$y_1(t) = 1, t \geq 0$$">
                <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation" 
height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
             </equation>
          </p>

I want to typeset the `text` attribute of equation (and ignore the <img> 
tag). So, I tried:

\startxmlsetups matlab
   % Bunch of missing definitions
   \xmlsetsetup{#1}{equation}{matlab:*}
\stopxmlsetups

\startxmlsetups matlab:equation
   \xmlatt{#1}{text}
\stopxmlsetups

This literally typesets `$$y_1(t) = 1, t \geq 0$$`. How can I flush the 
attribute using ctxcatcodes? (There is \xmlflushcontent, but that is for 
content and not attributes).

Thanks,
Aditya
___________________________________________________________________________________
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___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: XML and math
  2019-01-10 21:26 XML and math Aditya Mahajan
@ 2019-01-10 22:00 ` Henri Menke
  2019-01-10 22:09   ` Aditya Mahajan
  2019-01-10 22:08 ` Hans Hagen
  1 sibling, 1 reply; 6+ messages in thread
From: Henri Menke @ 2019-01-10 22:00 UTC (permalink / raw)
  To: ntg-context

On 11/01/19 10:26 AM, Aditya Mahajan wrote:
> Hi,
> 
> I have an XML file (which is generated via a program that I have no
> control over), which contains elements as follows:
> 
>          <p>
>             <equation text="$$y_1(t) = 1, t \geq 0$$">
>                <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation"
> height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
>             </equation>
>          </p>
> 
> I want to typeset the `text` attribute of equation (and ignore the <img>
> tag). So, I tried:
> 
> \startxmlsetups matlab
>   % Bunch of missing definitions
>   \xmlsetsetup{#1}{equation}{matlab:*}
> \stopxmlsetups
> 
> \startxmlsetups matlab:equation
>   \xmlatt{#1}{text}
> \stopxmlsetups
> 
> This literally typesets `$$y_1(t) = 1, t \geq 0$$`. How can I flush the
> attribute using ctxcatcodes? (There is \xmlflushcontent, but that is for
> content and not attributes).

You could write your own attribute fetcher in Lua.  Probably there is a
more elegant method.

\startbuffer[test]
         <p>
            <equation text="$$y_1(t) = 1, t \geq 0$$">
               <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation"
height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
            </equation>
         </p>
\stopbuffer

\startxmlsetups matlab
  % Bunch of missing definitions
  \xmlsetsetup{#1}{p}{matlab:*}
  \xmlsetsetup{#1}{equation}{matlab:*}
\stopxmlsetups

\startxmlsetups matlab:p
  \xmlflush{#1}
\stopxmlsetups

\startxmlsetups matlab:equation
  \xmlfunction{#1}{equation}
\stopxmlsetups
\startluacode
local a = "text"
local ctxcatcodes = catcodes.numbers.ctxcatcodes

function xml.functions.equation(id)
    local e = lxml.getid(id)
    if e then
        local at = e.at
        if at then
            local att = at[a]
            if att ~= "" then
                context.sprint(ctxcatcodes,att)
            end
        end
    end
end
\stopluacode

\xmlregistersetup{matlab}

\starttext
\xmlprocessbuffer{test}{test}{}
\stoptext


> 
> Thanks,
> Aditya
> ___________________________________________________________________________________
> 
> 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://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> 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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: XML and math
  2019-01-10 21:26 XML and math Aditya Mahajan
  2019-01-10 22:00 ` Henri Menke
@ 2019-01-10 22:08 ` Hans Hagen
  2019-01-10 23:21   ` Aditya Mahajan
  1 sibling, 1 reply; 6+ messages in thread
From: Hans Hagen @ 2019-01-10 22:08 UTC (permalink / raw)
  To: mailing list for ConTeXt users, Aditya Mahajan

On 1/10/2019 10:26 PM, Aditya Mahajan wrote:
> Hi,
> 
> I have an XML file (which is generated via a program that I have no 
> control over), which contains elements as follows:
> 
>           <p>
>              <equation text="$$y_1(t) = 1, t \geq 0$$">
>                 <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation" 
> height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
>              </equation>
>           </p>
> 
> I want to typeset the `text` attribute of equation (and ignore the <img> 
> tag). So, I tried:
> 
> \startxmlsetups matlab
>    % Bunch of missing definitions
>    \xmlsetsetup{#1}{equation}{matlab:*}
> \stopxmlsetups
> 
> \startxmlsetups matlab:equation
>    \xmlatt{#1}{text}
> \stopxmlsetups
> 
> This literally typesets `$$y_1(t) = 1, t \geq 0$$`. How can I flush the 
> attribute using ctxcatcodes? (There is \xmlflushcontent, but that is for 
> content and not attributes).
Time for an "aha, I knew it" moment ...

\starttext

\startbuffer[test]
<p>
     <equation text="$$y_1(t) = 1, t \geq 0$$">
        <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation" 
height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
     </equation>
</p>
\stopbuffer

\startxmlsetups whatever
     \xmlsetsetup{#1}{p|equation}{xml:*}
\stopxmlsetups

\xmlregistersetup{whatever}

\startxmlsetups xml:p
     \xmlflush{#1}
\stopxmlsetups

\startxmlsetups xml:equation
     \cldcontext{lxml.getid("#1").at.text}
\stopxmlsetups

\startxmlsetups xml:equation
     \startformula
         \cldcontext{(string.gsub(lxml.getid("#1").at.text,"[$][$]",""))}
     \stopformula
\stopxmlsetups

\xmlprocessbuffer{main}{test}{}

\stoptext


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | 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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: XML and math
  2019-01-10 22:00 ` Henri Menke
@ 2019-01-10 22:09   ` Aditya Mahajan
  0 siblings, 0 replies; 6+ messages in thread
From: Aditya Mahajan @ 2019-01-10 22:09 UTC (permalink / raw)
  To: mailing list for ConTeXt users

[-- Attachment #1: Type: text/plain, Size: 2295 bytes --]

On Fri, 11 Jan 2019, Henri Menke wrote:

> On 11/01/19 10:26 AM, Aditya Mahajan wrote:
>> Hi,
>> 
>> I have an XML file (which is generated via a program that I have no
>> control over), which contains elements as follows:
>> 
>>          <p>
>>             <equation text="$$y_1(t) = 1, t \geq 0$$">
>>                <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation"
>> height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
>>             </equation>
>>          </p>
>> 
>> I want to typeset the `text` attribute of equation (and ignore the <img>
>> tag). So, I tried:
>> 
>> \startxmlsetups matlab
>>   % Bunch of missing definitions
>>   \xmlsetsetup{#1}{equation}{matlab:*}
>> \stopxmlsetups
>> 
>> \startxmlsetups matlab:equation
>>   \xmlatt{#1}{text}
>> \stopxmlsetups
>> 
>> This literally typesets `$$y_1(t) = 1, t \geq 0$$`. How can I flush the
>> attribute using ctxcatcodes? (There is \xmlflushcontent, but that is for
>> content and not attributes).
>
> You could write your own attribute fetcher in Lua.  Probably there is a
> more elegant method.
>
> \startbuffer[test]
>         <p>
>            <equation text="$$y_1(t) = 1, t \geq 0$$">
>               <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation"
> height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
>            </equation>
>         </p>
> \stopbuffer
>
> \startxmlsetups matlab
>  % Bunch of missing definitions
>  \xmlsetsetup{#1}{p}{matlab:*}
>  \xmlsetsetup{#1}{equation}{matlab:*}
> \stopxmlsetups
>
> \startxmlsetups matlab:p
>  \xmlflush{#1}
> \stopxmlsetups
>
> \startxmlsetups matlab:equation
>  \xmlfunction{#1}{equation}
> \stopxmlsetups
> \startluacode
> local a = "text"
> local ctxcatcodes = catcodes.numbers.ctxcatcodes
>
> function xml.functions.equation(id)
>    local e = lxml.getid(id)
>    if e then
>        local at = e.at
>        if at then
>            local att = at[a]
>            if att ~= "" then
>                context.sprint(ctxcatcodes,att)
>            end
>        end
>    end
> end
> \stopluacode
>
> \xmlregistersetup{matlab}
>
> \starttext
> \xmlprocessbuffer{test}{test}{}
> \stoptext

Thanks!

Aditya

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___________________________________________________________________________________
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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: XML and math
  2019-01-10 22:08 ` Hans Hagen
@ 2019-01-10 23:21   ` Aditya Mahajan
  2019-01-11  1:28     ` Aditya Mahajan
  0 siblings, 1 reply; 6+ messages in thread
From: Aditya Mahajan @ 2019-01-10 23:21 UTC (permalink / raw)
  To: Hans Hagen; +Cc: mailing list for ConTeXt users

[-- Attachment #1: Type: text/plain, Size: 1658 bytes --]

On Thu, 10 Jan 2019, Hans Hagen wrote:

> On 1/10/2019 10:26 PM, Aditya Mahajan wrote:
>> Hi,
>> 
>> I have an XML file (which is generated via a program that I have no control 
>> over), which contains elements as follows:
>>
>>           <p>
>>              <equation text="$$y_1(t) = 1, t \geq 0$$">
>>                 <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation" 
>> height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
>>              </equation>
>>           </p>
>> 
>> I want to typeset the `text` attribute of equation (and ignore the <img> 
>> tag). So, I tried:
>> 
>> \startxmlsetups matlab
>>    % Bunch of missing definitions
>>    \xmlsetsetup{#1}{equation}{matlab:*}
>> \stopxmlsetups
>> 
>> \startxmlsetups matlab:equation
>>    \xmlatt{#1}{text}
>> \stopxmlsetups
>> 
>> This literally typesets `$$y_1(t) = 1, t \geq 0$$`. How can I flush the 
>> attribute using ctxcatcodes? (There is \xmlflushcontent, but that is for 
>> content and not attributes).
> Time for an "aha, I knew it" moment ...

:-) Thanks.

Follow-up question: How do I escape entities inside the attributes. One 
snippet is:

          <p>
             <equation text="$$x_2(t) = \begin{cases}  t, &amp; 0 \leq t 
&lt; 5 \\ -t+10,  &amp; t \geq&#xA;5\end{cases}$$">$$x_2(t) = 
\begin{cases}  t, &amp; 0 \leq t &lt; 5 \\ -t+10,  &amp; t \geq
5\end{cases}$$</equation>
          </p>

This contains `&#xA;` which I want to convert to either newline or blank.

(I have to use the text attribute. The content has the right information 
in this particular instance due to a bug in the conversion)

Aditya

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___________________________________________________________________________________
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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: XML and math
  2019-01-10 23:21   ` Aditya Mahajan
@ 2019-01-11  1:28     ` Aditya Mahajan
  0 siblings, 0 replies; 6+ messages in thread
From: Aditya Mahajan @ 2019-01-11  1:28 UTC (permalink / raw)
  To: mailing list for ConTeXt users

[-- Attachment #1: Type: text/plain, Size: 1489 bytes --]

On Thu, 10 Jan 2019, Aditya Mahajan wrote:

> On Thu, 10 Jan 2019, Hans Hagen wrote:
>
>> On 1/10/2019 10:26 PM, Aditya Mahajan wrote:
>>> Hi,
>>> 
>>> I have an XML file (which is generated via a program that I have no 
>>> control over), which contains elements as follows:
>>>
>>>           <p>
>>>              <equation text="$$y_1(t) = 1, t \geq 0$$">
>>>                 <img alt="$$y_1(t) = 1, t \geq 0$$" class="equation" 
>>> height="15px" src="Lab01_eq10401623798909303081.png" width="95px"/>
>>>              </equation>
>>>           </p>
>>> 
>>> I want to typeset the `text` attribute of equation (and ignore the <img> 
>>> tag). So, I tried:
>>> 
>>> \startxmlsetups matlab
>>>    % Bunch of missing definitions
>>>    \xmlsetsetup{#1}{equation}{matlab:*}
>>> \stopxmlsetups
>>> 
>>> \startxmlsetups matlab:equation
>>>    \xmlatt{#1}{text}
>>> \stopxmlsetups
>>> 
>>> This literally typesets `$$y_1(t) = 1, t \geq 0$$`. How can I flush the 
>>> attribute using ctxcatcodes? (There is \xmlflushcontent, but that is for 
>>> content and not attributes).
>> Time for an "aha, I knew it" moment ...
>
> This contains `&#xA;` which I want to convert to either newline or blank.

Some debugging showed that the entity was being translated correctly. I 
was typesetting the output under texcatcodes, which was causing the 
problem. Setting formfeedasciicode and endoflineasciicode to ignorecatcode 
made everything work correctly.

Aditya

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___________________________________________________________________________________
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://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-01-11  1:28 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-10 21:26 XML and math Aditya Mahajan
2019-01-10 22:00 ` Henri Menke
2019-01-10 22:09   ` Aditya Mahajan
2019-01-10 22:08 ` Hans Hagen
2019-01-10 23:21   ` Aditya Mahajan
2019-01-11  1:28     ` Aditya Mahajan

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