Re: [NTG-context] \externalfigure locator

2017-03-22 Thread Hans Hagen 

On 3/22/2017 9:30 AM, Procházka Lukáš Ing. wrote:

Hello,

a bit surprisingly no response so far.

Does it mean that no such a function exists?

If so, are there any Lua tables which provide list of current searching
paths and list of image extensions which ConTeXt handles? (In both
cases: in the place of use, as e.g. list of paths may change during use
of \(setup)externalfigure(s) at various places in the source document.)

Joseph mentioned 'figures.path' for paths;
is there something similar for valid image extensions (like
figures.extensions')?

If not, would it be possible to provide something like this?

- Just to explain: I need to perform some ops before inserting an image
via \externalfigure. And I would need to be able to locate the file to
be inserted, even when the picture is inserted by just a file name (with
no path) with path specified before by \setupexternalfigures.


manipulation plugins have been available for quite a while, just look 
into grph-con.lua for examples (the test suite has some converter 
examples too)


Hans


Best regards,

Lukas


On Tue, 21 Mar 2017 08:50:18 +0100, Procházka Lukáš Ing. <l...@pontex.cz>
wrote:


Hello Joseph,

thank you for reaction.

I guess:

- "figures.path' is a ConTeXt variable, is it?
- There are more extensions possible, not only .pdf. So how to access
other extensions Ctx is to manage?
- I guess that 'lpdf.epdf.load(figure_file)' is just a .pdf loader -
how to load other pics (like .png, .jpg, .svg...)?

Best regards,

Lukas


On Mon, 20 Mar 2017 09:34:19 +0100, <josephcan...@gmail.com> wrote:


Hi,

Personally I use the lua variable named : figures.path

It’s a lua table which contains directories names you provide in
directory= in \setupexternalfigures:

for _, path in ipairs(figures.paths) do
 local figure_file = path .. '/' .. file
  local doc = lpdf.epdf.load(figure_file)  -- assume pdf (just an
example)
 if doc then
  ….
 end
done

There are perhaps helper functions as well.

Joseph

De : Procházka Lukáš Ing.
Envoyé le :lundi 20 mars 2017 09:27
À : ConTeXt
Objet :[NTG-context] \externalfigure locator

Hello,

is there a Lua version of external figure locator used by
\externalfigure?

Suppose having:


\setupexternalfigures[location={default,local,global},directory={../../Pics}]

\externalfigure[mill]% Finds e.g. in
d:\Ctx-Beta\tex\texmf-context\tex\context\sample\common\mill.png
\externalfigure[MyPrettyPicture.jpg] % Finds e.g. in
c:\Lukas\Pics\MyPrettyPicture.jpg


And I need a function like:


\startluacode
   local path

   path = assert(ExternalFileLocator("mill") ==
"d:/Ctx-Beta/tex/texmf-context/tex/context/sample/common/mill.png")
   path = assert(ExternalFileLocator("MyPrettyPicture.jpg") ==
"c:/Lukas/Pics/MyPrettyPicture.jpg")
\stopluacode


So what to use in place of "ExternalFileLocator()"?

TIA.

Best regards,

Lukas











--

-
  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
___

Re: [NTG-context] \externalfigure locator

2017-03-22 Thread Procházka Lukáš Ing . 

Hello,

a bit surprisingly no response so far.

Does it mean that no such a function exists?

If so, are there any Lua tables which provide list of current searching paths 
and list of image extensions which ConTeXt handles? (In both cases: in the 
place of use, as e.g. list of paths may change during use of 
\(setup)externalfigure(s) at various places in the source document.)

Joseph mentioned 'figures.path' for paths;
is there something similar for valid image extensions (like 
figures.extensions')?

If not, would it be possible to provide something like this?

- Just to explain: I need to perform some ops before inserting an image via 
\externalfigure. And I would need to be able to locate the file to be inserted, 
even when the picture is inserted by just a file name (with no path) with path 
specified before by \setupexternalfigures.

Best regards,

Lukas


On Tue, 21 Mar 2017 08:50:18 +0100, Procházka Lukáš Ing. <l...@pontex.cz> wrote:


Hello Joseph,

thank you for reaction.

I guess:

- "figures.path' is a ConTeXt variable, is it?
- There are more extensions possible, not only .pdf. So how to access other 
extensions Ctx is to manage?
- I guess that 'lpdf.epdf.load(figure_file)' is just a .pdf loader - how to 
load other pics (like .png, .jpg, .svg...)?

Best regards,

Lukas


On Mon, 20 Mar 2017 09:34:19 +0100, <josephcan...@gmail.com> wrote:


Hi,

Personally I use the lua variable named : figures.path

It’s a lua table which contains directories names you provide in directory= in 
\setupexternalfigures:

for _, path in ipairs(figures.paths) do
 local figure_file = path .. '/' .. file
  local doc = lpdf.epdf.load(figure_file)  -- assume pdf (just an example)
 if doc then
  ….
 end
done

There are perhaps helper functions as well.

Joseph

De : Procházka Lukáš Ing.
Envoyé le :lundi 20 mars 2017 09:27
À : ConTeXt
Objet :[NTG-context] \externalfigure locator

Hello,

is there a Lua version of external figure locator used by \externalfigure?

Suppose having:


\setupexternalfigures[location={default,local,global},directory={../../Pics}]
\externalfigure[mill]% Finds e.g. in 
d:\Ctx-Beta\tex\texmf-context\tex\context\sample\common\mill.png
\externalfigure[MyPrettyPicture.jpg] % Finds e.g. in 
c:\Lukas\Pics\MyPrettyPicture.jpg


And I need a function like:


\startluacode
   local path

   path = assert(ExternalFileLocator("mill") == 
"d:/Ctx-Beta/tex/texmf-context/tex/context/sample/common/mill.png")
   path = assert(ExternalFileLocator("MyPrettyPicture.jpg") == 
"c:/Lukas/Pics/MyPrettyPicture.jpg")
\stopluacode


So what to use in place of "ExternalFileLocator()"?

TIA.

Best regards,

Lukas








--
Ing. Lukáš Procházka | mailto:l...@pontex.cz
Pontex s. r. o.  | mailto:pon...@pontex.cz | http://www.pontex.cz | 
IDDS:nrpt3sn
Bezová 1658
147 14 Praha 4

Tel: +420 241 096 751 (+420 720 951 172)
Fax: +420 244 461 038

___
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
___

Re: [NTG-context] \externalfigure locator

2017-03-21 Thread Procházka Lukáš Ing . 

Hello Joseph,

thank you for reaction.

I guess:

- "figures.path' is a ConTeXt variable, is it?
- There are more extensions possible, not only .pdf. So how to access other 
extensions Ctx is to manage?
- I guess that 'lpdf.epdf.load(figure_file)' is just a .pdf loader - how to 
load other pics (like .png, .jpg, .svg...)?

Best regards,

Lukas


On Mon, 20 Mar 2017 09:34:19 +0100, <josephcan...@gmail.com> wrote:


Hi,

Personally I use the lua variable named : figures.path

It’s a lua table which contains directories names you provide in directory= in 
\setupexternalfigures:

for _, path in ipairs(figures.paths) do
 local figure_file = path .. '/' .. file
  local doc = lpdf.epdf.load(figure_file)  -- assume pdf (just an example)
 if doc then
  ….
 end
done

There are perhaps helper functions as well.

Joseph

De : Procházka Lukáš Ing.
Envoyé le :lundi 20 mars 2017 09:27
À : ConTeXt
Objet :[NTG-context] \externalfigure locator

Hello,

is there a Lua version of external figure locator used by \externalfigure?

Suppose having:


\setupexternalfigures[location={default,local,global},directory={../../Pics}]
\externalfigure[mill]% Finds e.g. in 
d:\Ctx-Beta\tex\texmf-context\tex\context\sample\common\mill.png
\externalfigure[MyPrettyPicture.jpg] % Finds e.g. in 
c:\Lukas\Pics\MyPrettyPicture.jpg


And I need a function like:


\startluacode
   local path

   path = assert(ExternalFileLocator("mill") == 
"d:/Ctx-Beta/tex/texmf-context/tex/context/sample/common/mill.png")
   path = assert(ExternalFileLocator("MyPrettyPicture.jpg") == 
"c:/Lukas/Pics/MyPrettyPicture.jpg")
\stopluacode


So what to use in place of "ExternalFileLocator()"?

TIA.

Best regards,

Lukas





--
Ing. Lukáš Procházka | mailto:l...@pontex.cz
Pontex s. r. o.  | mailto:pon...@pontex.cz | http://www.pontex.cz | 
IDDS:nrpt3sn
Bezová 1658
147 14 Praha 4

Tel: +420 241 096 751 (+420 720 951 172)
Fax: +420 244 461 038

___
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
___

[NTG-context] \externalfigure locator

2017-03-20 Thread Procházka Lukáš Ing . 

Hello,

is there a Lua version of external figure locator used by \externalfigure?

Suppose having:


\setupexternalfigures[location={default,local,global},directory={../../Pics}]
\externalfigure[mill]% Finds e.g. in 
d:\Ctx-Beta\tex\texmf-context\tex\context\sample\common\mill.png
\externalfigure[MyPrettyPicture.jpg] % Finds e.g. in 
c:\Lukas\Pics\MyPrettyPicture.jpg


And I need a function like:


\startluacode
  local path

  path = assert(ExternalFileLocator("mill") == 
"d:/Ctx-Beta/tex/texmf-context/tex/context/sample/common/mill.png")
  path = assert(ExternalFileLocator("MyPrettyPicture.jpg") == 
"c:/Lukas/Pics/MyPrettyPicture.jpg")
\stopluacode


So what to use in place of "ExternalFileLocator()"?

TIA.

Best regards,

Lukas


--
Ing. Lukáš Procházka | mailto:l...@pontex.cz
Pontex s. r. o.  | mailto:pon...@pontex.cz | http://www.pontex.cz | 
IDDS:nrpt3sn
Bezová 1658
147 14 Praha 4

Tel: +420 241 096 751 (+420 720 951 172)
Fax: +420 244 461 038

___
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
___