On 14-11-2011 09:47, Aditya Mahajan wrote:
On Fri, 11 Nov 2011, Steffen Wolfrum wrote:
quite often I wish we could have a kind of in line comment:
Something like ¿this is my comment¡ this.
I assume it is not trivial due to catcode issues, to say the least.
But nevertheless, as it is getting close to christmas, I just wanted
to mention this idea here.
As long as there is no line break in the comment, the following lua
based solution works (inspired by m-translate)
\startluacode
local comments = {}
thirddata = thirddata or {}
thirddata.comments = comments
function comments.translate(s)
return string.gsub(s, "¿.-¡","")
end
local textlineactions = resolvers.openers.helpers.textlineactions
utilities.sequencers.appendaction(textlineactions,"after","thirddata.comments.translate")
function comments.enable()
utilities.sequencers.enableaction(textlineactions,"thirddata.comments.translate")
end
function comments.disable()
utilities.sequencers.disableaction(textlineactions,"thirddata.comments.translate")
end
comments.disable()
\stopluacode
\def\enablecomments {\ctxlua{thirddata.comments.enable()}}
\def\disablecomments{\ctxlua{thirddata.comments.disable()}}
\appendtoks
\enablecomments
\to \everystarttext
\starttext
\section{An ¿in \iffalse comment¡ works}
Multiple ¿in \iffalse comment¡ with something ¿in \iffalse comment¡ in
betweeen
\stoptext
or ...
\startluacode
thirddata = thirddata or { }
local comments = { filters = { } }
thirddata.comments = comments
local textlineactions = resolvers.openers.helpers.textlineactions
local sequencers = utilities.sequencers
local constants = interfaces.constants
local gsub, find, format = string.gsub, string.find, string.format
function comments.install(name,settings)
local settings = utilities.parsers.settings_to_hash(settings)
local start = string.escapedpattern(settings[constants.start]
or "")
local stop = string.escapedpattern(settings[constants.stop] or "")
if start ~= "" and stop ~= "" then
local pattern = start .. ".-" .. stop
comments.filters[name] = function(s)
if s == "" then
return ""
elseif find(s,start) then
return (gsub(s,pattern,""))
else
return s
end
end
sequencers.appendaction(textlineactions,"after",format("thirddata.comments.filters.%s",name))
comments.disable(name)
end
end
function comments.enable(name)
sequencers.enableaction(textlineactions,format("thirddata.comments.filters.%s",name))
end
function comments.disable(name)
sequencers.disableaction(textlineactions,format("thirddata.comments.filters.%s",name))
end
\stopluacode
\unprotect
\unexpanded\def\installcomments{\dodoubleargument\doinstallcomments}
\def\doinstallcomments[#1][#2]%
{\ctxlua{thirddata.comments.install(\!!bs#1\!!es,\!!bs\detokenize{#2}\!!es)}}
\unexpanded\def\enablecomments[#1]%
{\ctxlua{thirddata.comments.enable (\!!bs#1\!!es)}}
\unexpanded\def\disablecomments[#1]%
{\ctxlua{thirddata.comments.disable(\!!bs#1\!!es)}}
\protect
\installcomments[test] [start=¿,stop=¡]
\installcomments[test2][start=¡,stop=¿]
\enablecomments[test]
\enablecomments[test2]
\starttext
\section{An ¿in \iffalse comment¡ works}
Multiple ¿in \iffalse comment¡ with something ¿in \iffalse comment¡ in
betweeen
oeps ¿oeps¡ oeps ¡oeps¿ oeps
\stoptext
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