latex to html or plain text without any latex construct

latex to html or plain text without any latex construct

[Uwe Brauer]

Hi

I want to strip from my latex file any latex command. I know about the
detex command but even that leaves some text constructs.
Is there any option in pandoc which can achieve that?

I tried

pandoc file.tex -o file.epub

pandoc file.epub -t plain -o result.text

But still the file contains stuff like
$$\begin{aligned} \label{eq:iteration-scheme:1} \partial_t\rho +
v^a\partial_a\rho + \rho \partial_a v^a &= 0 \\
\label{eq:iteration-scheme:2} \rho \left(\partial_t v^a + v^b\partial_b
v^a \right) + \partial^a p &= - \rho\partial^a\phi \\
\label{eq:iteration-scheme:3} \Delta\phi &=

Etc etc

Thanks

Uwe Brauer 

Re: latex to html or plain text without any latex construct

[John MACFARLANE]

With -t plain, pandoc will only emit tex math if it can't
"fake it with unicode."  (Of course, that will be the case
with the complicated equation you mention.)

If you want this to be simply removed, you can combine
-t plain with a filter that removes all Math elements.


+++ Uwe Brauer [Aug 21 17 14:26 ]:
>Hi
>
>I want to strip from my latex file any latex command. I know about the
>detex command but even that leaves some text constructs.
>Is there any option in pandoc which can achieve that?
>
>I tried
>
>pandoc file.tex -o file.epub
>
>pandoc file.epub -t plain -o result.text
>
>But still the file contains stuff like
>$$\begin{aligned} \label{eq:iteration-scheme:1} \partial_t\rho +
>v^a\partial_a\rho + \rho \partial_a v^a &= 0 \\
>\label{eq:iteration-scheme:2} \rho \left(\partial_t v^a + v^b\partial_b
>v^a \right) + \partial^a p &= - \rho\partial^a\phi \\
>\label{eq:iteration-scheme:3} \Delta\phi &=
>
>Etc etc
>
>Thanks
>
>Uwe Brauer
>
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Re: latex to html or plain text without any latex construct

[Uwe Brauer]

>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

   > With -t plain, pandoc will only emit tex math if it can't
   > "fake it with unicode."  (Of course, that will be the case
   > with the complicated equation you mention.)

   > If you want this to be simply removed, you can combine
   > -t plain with a filter that removes all Math elements.


Sorry, I just realized that I asked this some years ago and you proposed
the following solution

   >     -- stripmath.hs
   >     -- compile: ghc --make stripmath.hs
   >     -- run: pandoc input.txt -t json | ./stripmath | pandoc -f json -t plain 
where stripmath is

import Text.Pandoc
    
main = toJsonFilter stripmath
    where stripmath (Math _ _) = Str "FORMULA"
          stripmath x = x


I just tried that out with the old compiled stripmath
but I obtain
/home/oub/scripts/stripmath: error while loading shared libraries:
libgmp.so.3: cannot open shared object file: No such file or directory 


So I presume I have to recompile it again but this time I receive 

hc --make stripmath.hs
[1 of 1] Compiling Main             ( stripmath.hs, stripmath.o )

stripmath.hs:3:8:
    No instance for (ToJsonFilter (Inline -> Inline))
      arising from a use of `toJsonFilter'
    Possible fix:
      add an instance declaration for (ToJsonFilter (Inline -> Inline))
    In the expression: toJsonFilter stripmath
    In an equation for `main':
        main
          = toJsonFilter stripmath
          where
              stripmath (Math _ _) = Str "FORMULA"
              stripmath x = x


I don't know enough haskell to deal with this. Any help is appreciated.

Thanks

Uwe Brauer 

Re: latex to html or plain text without any latex construct

[John MACFARLANE]

Try with toJSONFilter rather than toJsonFilter

>import Text.Pandoc
>
>main = toJsonFilter stripmath
>    where stripmath (Math _ _) = Str "FORMULA"
>          stripmath x = x

Re: latex to html or plain text without any latex construct

[Uwe Brauer]

>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

   > Try with toJSONFilter rather than toJsonFilter
   >> import Text.Pandoc
   >> 
   >> main = toJsonFilter stripmath
   >> where stripmath (Math _ _) = Str "FORMULA"
   >> stripmath x = x

Then I obtain 
stripmath.hs:3:8:
    Not in scope: `toJSONFilter'
    Perhaps you meant `toJsonFilter' (imported from Text.Pandoc)


I am running pandoc 1.17.2

Re: latex to html or plain text without any latex construct

[John MacFarlane]

Ah, you also need

import Text.Pandoc.JSON

instead of

import Text.Pandoc

+++ Uwe Brauer [Aug 22 17 20:16 ]:
>>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
>   > Try with toJSONFilter rather than toJsonFilter
>   >> import Text.Pandoc
>   >>
>   >> main = toJsonFilter stripmath
>   >> where stripmath (Math _ _) = Str "FORMULA"
>   >> stripmath x = x
>
>Then I obtain
>stripmath.hs:3:8:
>    Not in scope: `toJSONFilter'
>    Perhaps you meant `toJsonFilter' (imported from Text.Pandoc)
>
>
>I am running pandoc 1.17.2
>
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[SOLVED, almost] (was: latex to html or plain text without any latex construct)

[Uwe Brauer]

>>> "John" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

   > Ah, you also need
   > import Text.Pandoc.JSON

Thanks! That works like charm.

However a typical sentence could look like this.
Replacing the density $\rho$ by the Makino variable $w$, the system
(\ref{eq:iteration-scheme:1})--(\ref{eq:iteration-scheme:3}) coupled with the 
equation of state (\ref{eq:state}) takes the
following form.

Which is then replace by

Replacing the density FORMULA by the Makino variable FORMULA, the system
([eq:iteration-scheme:1])–([eq:iteration-scheme:3]) coupled with the
equation of state ([eq:state]) takes the following form: 

Is there any change to replace \ref{eq:iteration-scheme:1} by the word
LABEL?

Thanks

Uwe Brauer 


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Re: (was: latex to html or plain text without any latex construct)

[John MacFarlane]

+++ Uwe Brauer [Aug 23 17 12:22 ]:

>However a typical sentence could look like this.
>Replacing the density $\rho$ by the Makino variable $w$, the system
>(\ref{eq:iteration-scheme:1})--(\ref{eq:iteration-scheme:3}) coupled with the
>equation of state (\ref{eq:state}) takes the
>following form.
>
>Which is then replace by
>
>Replacing the density FORMULA by the Makino variable FORMULA, the system
>([eq:iteration-scheme:1])–([eq:iteration-scheme:3]) coupled with the
>equation of state ([eq:state]) takes the following form:
>
>Is there any change to replace \ref{eq:iteration-scheme:1} by the word
>LABEL?

It's quite easy to do that with the dev version of pandoc,
but with the version you're using you'd need to filter for
a string with contents beginning "[eq:".

Use pandoc -t native to see what the parsed document looks
like, and that should help you write the filter.

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Re: (was: latex to html or plain text without any latex construct)

[John MacFarlane]

Or, you could use sed or perl to convert the \refs before
processing with pandoc.

Re:

[Uwe Brauer]

   > +++ Uwe Brauer [Aug 23 17 12:22 ]:

   > It's quite easy to do that with the dev version of pandoc,
   > but with the version you're using you'd need to filter for
   > a string with contents beginning "[eq:".

I wouldn't mind to download and compile the dev version of pandoc.
But how am I supposed to do it with that version?

Re:

[Uwe Brauer]

>>> "John" == John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

   > Or, you could use sed or perl to convert the \refs before
   > processing with pandoc.

I think than I would prefer elisp and emacs. :-D

Re:

[John MACFARLANE]

+++ Uwe Brauer [Aug 23 17 16:13 ]:
>I wouldn't mind to download and compile the dev version of pandoc.
>But how am I supposed to do it with that version?

With dev pandoc,

pandoc -t native -f latex
\label{hi}
[Para [Span ("hi",[],[("label","hi")]) [Str "[hi]"]]]

So your filter could pattern match on a Span with
label attribute:

go (Math _ _) = Str "FORMULA"
go (Span (_,_,[("label",_)]) _) = Str "LABEL"
go x = x

Re:

[Uwe Brauer]

>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

   > +++ Uwe Brauer [Aug 23 17 16:13 ]:
   >> I wouldn't mind to download and compile the dev version of pandoc.
   >> But how am I supposed to do it with that version?

   > With dev pandoc,

   > pandoc -t native -f latex
   > \label{hi}
   > [Para [Span ("hi",[],[("label","hi")]) [Str "[hi]"]]]

   > So your filter could pattern match on a Span with
   > label attribute:

   > go (Math _ _) = Str "FORMULA"
   > go (Span (_,_,[("label",_)]) _) = Str "LABEL"
   > go x = x

I just found out that I have a compiled version from march this year.

,----
| pandoc 1.19.2.1
| Compiled with pandoc-types 1.17.0.4, texmath 0.9, skylighting 0.1.1.4
| Default user data directory: /home/oub/.pandoc
| Copyright (C) 2006-2016 John MacFarlane
| Web:  http://pandoc.org
| This is free software; see the source for copying conditions.
| There is no warranty, not even for merchantability or fitness
| for a particular purpose.
`----

So I hoped this is recent enough.
I now considered the following stripmath.hs file
,----
| import Text.Pandoc.JSON
|     
| main = toJSONFilter stripmath
|     where stripmath (Math _ _) = Str "FORMULA"
|           stripmath x = x
| go (Math _ _) = Str "FORMULA"
| go (Span (_,_,[("label",_)]) _) = Str "LABEL"
| go x = x
`----
then I did
ghc --make stripmath.hs

And after compilation

/home/oub/.local/bin/pandoc eulerpoisson.tex -t json | /home/oub/scripts/Strip2/stripmath | pandoc -f json -t plain -o euler-grammar.tex

But I obtainedstripmath: Error in $: expected product (:*:), encountered Object
pandoc: Error in $: not enough input

Sorry for this elementary question.

Uwe Brauer 

Re:

[John MACFARLANE]

No, you need dev pandoc.

+++ Uwe Brauer [Aug 24 17 16:26 ]:
>>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
>   > +++ Uwe Brauer [Aug 23 17 16:13 ]:
>   >> I wouldn't mind to download and compile the dev version of pandoc.
>   >> But how am I supposed to do it with that version?
>
>   > With dev pandoc,
>
>   > pandoc -t native -f latex
>   > \label{hi}
>   > [Para [Span ("hi",[],[("label","hi")]) [Str "[hi]"]]]
>
>   > So your filter could pattern match on a Span with
>   > label attribute:
>
>   > go (Math _ _) = Str "FORMULA"
>   > go (Span (_,_,[("label",_)]) _) = Str "LABEL"
>   > go x = x
>
>I just found out that I have a compiled version from march this year.
>
>,----
>| pandoc 1.19.2.1
>| Compiled with pandoc-types 1.17.0.4, texmath 0.9, skylighting 0.1.1.4
>| Default user data directory: /home/oub/.pandoc
>| Copyright (C) 2006-2016 John MacFarlane
>| Web:  http://pandoc.org
>| This is free software; see the source for copying conditions.
>| There is no warranty, not even for merchantability or fitness
>| for a particular purpose.
>`----
>
>So I hoped this is recent enough.
>I now considered the following stripmath.hs file
>,----
>| import Text.Pandoc.JSON
>|
>| main = toJSONFilter stripmath
>|     where stripmath (Math _ _) = Str "FORMULA"
>|           stripmath x = x
>| go (Math _ _) = Str "FORMULA"
>| go (Span (_,_,[("label",_)]) _) = Str "LABEL"
>| go x = x
>`----
>then I did
>ghc --make stripmath.hs
>
>And after compilation
>
>/home/oub/.local/bin/pandoc eulerpoisson.tex -t json | /home/oub/scripts/Strip2/stripmath | pandoc -f json -t plain -o euler-grammar.tex
>
>But I obtainedstripmath: Error in $: expected product (:*:), encountered Object
>pandoc: Error in $: not enough input
>
>Sorry for this elementary question.
>
>Uwe Brauer
>
>-- 
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Re:

[John MACFARLANE]

And in addition, you must make sure that your
filter is compiled against the same version of
pandoc-types as the pandoc executable.

+++ Uwe Brauer [Aug 24 17 16:26 ]:
>>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
>   > +++ Uwe Brauer [Aug 23 17 16:13 ]:
>   >> I wouldn't mind to download and compile the dev version of pandoc.
>   >> But how am I supposed to do it with that version?
>
>   > With dev pandoc,
>
>   > pandoc -t native -f latex
>   > \label{hi}
>   > [Para [Span ("hi",[],[("label","hi")]) [Str "[hi]"]]]
>
>   > So your filter could pattern match on a Span with
>   > label attribute:
>
>   > go (Math _ _) = Str "FORMULA"
>   > go (Span (_,_,[("label",_)]) _) = Str "LABEL"
>   > go x = x
>
>I just found out that I have a compiled version from march this year.
>
>,----
>| pandoc 1.19.2.1
>| Compiled with pandoc-types 1.17.0.4, texmath 0.9, skylighting 0.1.1.4
>| Default user data directory: /home/oub/.pandoc
>| Copyright (C) 2006-2016 John MacFarlane
>| Web:  http://pandoc.org
>| This is free software; see the source for copying conditions.
>| There is no warranty, not even for merchantability or fitness
>| for a particular purpose.
>`----
>
>So I hoped this is recent enough.
>I now considered the following stripmath.hs file
>,----
>| import Text.Pandoc.JSON
>|
>| main = toJSONFilter stripmath
>|     where stripmath (Math _ _) = Str "FORMULA"
>|           stripmath x = x
>| go (Math _ _) = Str "FORMULA"
>| go (Span (_,_,[("label",_)]) _) = Str "LABEL"
>| go x = x
>`----
>then I did
>ghc --make stripmath.hs
>
>And after compilation
>
>/home/oub/.local/bin/pandoc eulerpoisson.tex -t json | /home/oub/scripts/Strip2/stripmath | pandoc -f json -t plain -o euler-grammar.tex
>
>But I obtainedstripmath: Error in $: expected product (:*:), encountered Object
>pandoc: Error in $: not enough input
>
>Sorry for this elementary question.
>
>Uwe Brauer
>
>-- 
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Re:

[Uwe Brauer]

   > No, you need dev pandoc.

Following the INSTALL.md file
I run
stack setup
stack install --test
and got an error.

Warning: File listed in pandoc.cabal file does not exist: data/odt/Configurations2/accelerator/current.xml
pandoc-1.19.2.1: build (lib + exe + test)
Package pandoc uses a custom Cabal build, but does not use a custom-setup stanza
Not using the explicit setup deps approach based on configuration
Strongly recommend fixing the package's cabal file
Preprocessing library pandoc-1.19.2.1...
Preprocessing executable 'pandoc' for pandoc-1.19.2.1...
Preprocessing test suite 'test-pandoc' for pandoc-1.19.2.1...
Warning: File listed in pandoc.cabal file does not exist: data/odt/Configurations2/accelerator/current.xml
pandoc-1.19.2.1: copy/register
Package pandoc uses a custom Cabal build, but does not use a custom-setup stanza
Not using the explicit setup deps approach based on configuration
Strongly recommend fixing the package's cabal file
data/odt/Configurations2/accelerator/current.xml: copyFile: does not exist (No
such file or directory)
Progress: 0/2'cabal copy' failed.  Error message:

--  While building package pandoc-1.19.2.1 using:
      /home/oub/ALLES/src/pandoc-hg/.stack-work/dist/i386-linux/Cabal-1.24.0.0/setup/setup --builddir=.stack-work/dist/i386-linux/Cabal-1.24.0.0 copy
    Process exited with code: ExitFailure 1

Possible causes of this issue:
* No module named "Main". The 'main-is' source file should usually have
a header indicating that it's a 'Main' module. 
* The Setup.hs file is changing the installation target dir.

Re:

[Uwe Brauer]

>>> "John" == John MACFARLANE <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:

   > And in addition, you must make sure that your
   > filter is compiled against the same version of
   > pandoc-types as the pandoc executable.

How do I do that?
The installation file INSTALL.md does not give hints or is it

### Building the whole pandoc ecosystem

Re:

[John MACFARLANE]

Doesn't look like you're using the right source code (it
says pandoc-1.19.2.1).

Easiest approach would be to grab a binary from
pandoc-nightly.

For compiling the filters, it should suffice if
you 'cabal install pandoc-types' first, then use
ghc.


+++ Uwe Brauer [Aug 24 17 17:30 ]:
>
>   > No, you need dev pandoc.
>
>Following the INSTALL.md file
>I run
>stack setup
>stack install --test
>and got an error.
>
>Warning: File listed in pandoc.cabal file does not exist: data/odt/Configurations2/accelerator/current.xml
>pandoc-1.19.2.1: build (lib + exe + test)
>Package pandoc uses a custom Cabal build, but does not use a custom-setup stanza
>Not using the explicit setup deps approach based on configuration
>Strongly recommend fixing the package's cabal file
>Preprocessing library pandoc-1.19.2.1...
>Preprocessing executable 'pandoc' for pandoc-1.19.2.1...
>Preprocessing test suite 'test-pandoc' for pandoc-1.19.2.1...
>Warning: File listed in pandoc.cabal file does not exist: data/odt/Configurations2/accelerator/current.xml
>pandoc-1.19.2.1: copy/register
>Package pandoc uses a custom Cabal build, but does not use a custom-setup stanza
>Not using the explicit setup deps approach based on configuration
>Strongly recommend fixing the package's cabal file
>data/odt/Configurations2/accelerator/current.xml: copyFile: does not exist (No
>such file or directory)
>Progress: 0/2'cabal copy' failed.  Error message:
>
>--  While building package pandoc-1.19.2.1 using:
>      /home/oub/ALLES/src/pandoc-hg/.stack-work/dist/i386-linux/Cabal-1.24.0.0/setup/setup --builddir=.stack-work/dist/i386-linux/Cabal-1.24.0.0 copy
>    Process exited with code: ExitFailure 1
>
>Possible causes of this issue:
>* No module named "Main". The 'main-is' source file should usually have
>a header indicating that it's a 'Main' module.
>* The Setup.hs file is changing the installation target dir.
>
>
>
>
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