Re: [O] accessing source block header arguments from exporters
I agree with "Not exactly". In this post http://kitchingroup.cheme.cmu.edu/blog/2014/09/22/Showing-what-data-went-into-a-code-block-on-export/ I did something where I wanted to get information about the variables passed into a block and show that on export. You might get some inspiration from that. The result is at http://kitchingroup.cheme.cmu.edu/media/2014-09-22-Showing-what-data-went-into-a-code-block-on-export/custom-src-table-export-3.html Charles Berry writes: > Robert Klein roklein.de> writes: > >> >> Hi, >> >> is there a way, to read header arguments to source blocks in the >> exporters org--src-block funktions? > > Not directly. org-babel-exp-code has no provision for headers. > They get dropped. > >> >> E.g. is there a way to access :firstline in the example below? >> > > Not exactly, but ... > > If you precede the code block with > > #+attr_firstline: 23 > > then with point in the src block > > (org-element-property :attr_firstline (org-element-context)) > > will return ("23"). And org-*-src-block functions can use it. > > If you really want to use the :firstline idiom, you can add a hook in > `org-export-before-processing-hook' to find :firstline headers and > insert #+attr_firstline lines in the buffer copy that the exporter is using. > >> #+begin_src c++ -n :firstline 23 >>static struct >> { >> char*entity; >> unsigned char equiv; >> } entities[] = >> { >> { "lt", '<' } , >> { "gt", '>' } , >> { "amp", '&' } , >> { "quot", '"' } , >> { "trade",153 } , /* trade mark */ >> #+end_src >> >> I didn't find it in the `element' structure. >> >> However, if I use >> >> #+begin_src c++ firstline=23 >> // random C++ >> #+end_src >> >> I could access :parameters from `element' and parse the string. >> However I'm not sure if I'd break some babel stuff or not. >> > > C-c C-v C-i on that src block shows that 'firstline=23' is treated as > a switch by babel. So if there is any language that tries to use that > as a switch (or has a regexp that matches it), there could be trouble. > > But in C it looks innocuous. > >> If I'm trying to implement a firstline feature -- source blocks with >> new line numbering (-n) beginning at a given line number -- I'd prefer >> to use :firstline, but I didn't find anything to suggest `:XXX ZZ' >> header arguments to source blocks are available to the exporters. >> > > HTH, > > Chuck -- Professor John Kitchin Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 @johnkitchin http://kitchingroup.cheme.cmu.edu
Re: [O] accessing source block header arguments from exporters
Robert Klein roklein.de> writes: > > Hi, > > is there a way, to read header arguments to source blocks in the > exporters org--src-block funktions? Not directly. org-babel-exp-code has no provision for headers. They get dropped. > > E.g. is there a way to access :firstline in the example below? > Not exactly, but ... If you precede the code block with #+attr_firstline: 23 then with point in the src block (org-element-property :attr_firstline (org-element-context)) will return ("23"). And org-*-src-block functions can use it. If you really want to use the :firstline idiom, you can add a hook in `org-export-before-processing-hook' to find :firstline headers and insert #+attr_firstline lines in the buffer copy that the exporter is using. > #+begin_src c++ -n :firstline 23 >static struct > { > char*entity; > unsigned char equiv; > } entities[] = > { > { "lt", '<' } , > { "gt", '>' } , > { "amp", '&' } , > { "quot", '"' } , > { "trade",153 } , /* trade mark */ > #+end_src > > I didn't find it in the `element' structure. > > However, if I use > > #+begin_src c++ firstline=23 > // random C++ > #+end_src > > I could access :parameters from `element' and parse the string. > However I'm not sure if I'd break some babel stuff or not. > C-c C-v C-i on that src block shows that 'firstline=23' is treated as a switch by babel. So if there is any language that tries to use that as a switch (or has a regexp that matches it), there could be trouble. But in C it looks innocuous. > If I'm trying to implement a firstline feature -- source blocks with > new line numbering (-n) beginning at a given line number -- I'd prefer > to use :firstline, but I didn't find anything to suggest `:XXX ZZ' > header arguments to source blocks are available to the exporters. > HTH, Chuck
[O] accessing source block header arguments from exporters
Hi, is there a way, to read header arguments to source blocks in the exporters org--src-block funktions? E.g. is there a way to access :firstline in the example below? #+begin_src c++ -n :firstline 23 static struct { char*entity; unsigned char equiv; } entities[] = { { "lt", '<' } , { "gt", '>' } , { "amp", '&' } , { "quot", '"' } , { "trade",153 } , /* trade mark */ #+end_src I didn't find it in the `element' structure. However, if I use #+begin_src c++ firstline=23 // random C++ #+end_src I could access :parameters from `element' and parse the string. However I'm not sure if I'd break some babel stuff or not. If I'm trying to implement a firstline feature -- source blocks with new line numbering (-n) beginning at a given line number -- I'd prefer to use :firstline, but I didn't find anything to suggest `:XXX ZZ' header arguments to source blocks are available to the exporters. Any advice? Thank you very much Robert