Re: [NTG-context] lua code prevents compilation

30 Mar 2015


      On 3/30/2015 5:19 PM, Pablo Rodriguez wrote:
...
Dear list,
I have the following sample:
\startluacode
function document.addfunnyhyphen(tfmdata)
         local underscore = utf.byte("_")
         local char       = tfmdata.characters[underscore]
         tfmdata.characters[0xFE000]   = {
             width    = 0,
             height   = 0,
             depth    = 0,
             commands = {
                 { "right", -char.width },
                 { "down", char.depth },
                 { "slot", 1, underscore },
             }
         }
     end
utilities.sequencers.appendaction("aftercopyingcharacters","after","document.addfunnyhyphen")
\stopluacode
\def\CoverImageFile{}%\externalfigure[TypeWriter][width=\textwidth]}
\definefontfamily[ornamenta][rm][FontAwesome]
\def\CoverImageFont{\scale[width=\textwidth]{\ornamenta }}
\def\CoverImage{\doifsomethingelse{\CoverImageFile}{\CoverImageFile}{\CoverImageFont}}
\starttext
\CoverImage
\stoptext
For some reason unknown to me, the only way to compile the sample is to
remove the luacode snippet.
I need the lua code to have underscore hyphenation in type commands. And
I need two extra \definehyphenationfeatures and \sethyphenationfeatures
to invoke it.
Have I hit a bug or what am I missing?
I don't know as i see nothing at all with that code .. this is more fun:

\startluacode

     function document.addfunnyhyphen(tfmdata)
         local underscore = utf.byte("_")
         local char       = tfmdata.characters[underscore]
         tfmdata.characters[0xFE000]   = {
             width    = 0,
             height   = 0,
             depth    = 0,
             commands = {
                 { "right", -char.width },
                 { "down", char.depth },
                 { "slot", 1, underscore },
             }
         }
         tfmdata.characters[0xFE001]   = {
             width    = 0,
             height   = 0,
             depth    = 0,
             commands = {
                 { "down", char.depth },
                 { "slot", 1, underscore },
                 { "right", char.width },
             }
         }
     end


utilities.sequencers.appendaction("aftercopyingcharacters","after","document.addfunnyhyphen")

\stopluacode

\setuplanguage[en][righthyphenchar="FE000,lefthyphenchar="FE001]

\starttext
     \input tufte
\stoptext


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------