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if not modules then modules = { } end modules ['luat-mac'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- Sometimes we run into situations like:
--
-- \def\foo#1{\expandafter\def\csname#1\endcsname}
--
-- As this confuses the parser, the following should be used instead:
--
-- \def\foo#1{\expandafter\normaldef\csname#1\endcsname}
local P, V, S, R, C, Cs, Cmt, Carg = lpeg.P, lpeg.V, lpeg.S, lpeg.R, lpeg.C, lpeg.Cs, lpeg.Cmt, lpeg.Carg
local lpegmatch, patterns = lpeg.match, lpeg.patterns
local insert, remove = table.insert, table.remove
local rep, sub = string.rep, string.sub
local setmetatable = setmetatable
local pushtarget, poptarget = logs.pushtarget, logs.poptarget
local report_macros = logs.reporter("interface","macros")
local stack, top, n, hashes = { }, nil, 0, { }
local function set(s)
if top then
n = n + 1
if n > 9 then
report_macros("number of arguments > 9, ignoring %s",s)
else
local ns = #stack
local h = hashes[ns]
if not h then
h = rep("#",2^(ns-1))
hashes[ns] = h
end
m = h .. n
top[s] = m
return m
end
end
end
local function get(s)
if not top then
report_macros("keeping #%s, no stack",s)
return "#" .. s -- can be lua
end
local m = top[s]
if m then
return m
else
report_macros("keeping #%s, not on stack",s)
return "#" .. s -- quite likely an error
end
end
local function push()
top = { }
n = 0
local s = stack[#stack]
if s then
setmetatable(top,{ __index = s })
end
insert(stack,top)
end
local function pop()
top = remove(stack)
end
local leftbrace = P("{") -- will be in patterns
local rightbrace = P("}")
local escape = P("\\")
local space = patterns.space
local spaces = space^1
local newline = patterns.newline
local nobrace = 1 - leftbrace - rightbrace
local longleft = leftbrace -- P("(")
local longright = rightbrace -- P(")")
local nolong = 1 - longleft - longright
local name = R("AZ","az")^1
local csname = (R("AZ","az") + S("@?!_"))^1
local longname = (longleft/"") * (nolong^1) * (longright/"")
local variable = P("#") * Cs(name + longname)
local escapedname = escape * csname
local definer = escape * (P("def") + S("egx") * P("def")) -- tex
local setter = escape * P("set") * (P("u")^-1 * S("egx")^-1) * P("value") -- context specific
--- + escape * P("install") * (1-P("handler"))^1 * P("handler") -- context specific
local startcode = P("\\starttexdefinition") -- context specific
local stopcode = P("\\stoptexdefinition") -- context specific
local anything = patterns.anything
local always = patterns.alwaysmatched
-- The comment nilling can become an option but it nicely compensates the Lua
-- parsing here with less parsing at the TeX end. We keep lines so the errors
-- get reported all right, but comments are never seen there anyway. We keep
-- comment that starts inline as it can be something special with a % (at some
-- point we can do that as well, esp if we never use \% or `% somewhere
-- unpredictable). We need to skip comments anyway. Hm, too tricky, this
-- stripping as we can have Lua code etc.
local commenttoken = P("%")
local crorlf = S("\n\r")
----- commentline = commenttoken * ((Carg(1) * C((1-crorlf)^0))/function(strip,s) return strip and "" or s end)
local commentline = commenttoken * ((1-crorlf)^0)
local leadingcomment = (commentline * crorlf^1)^1
local furthercomment = (crorlf^1 * commentline)^1
local pushlocal = always / push
local poplocal = always / pop
local declaration = variable / set
local identifier = variable / get
local argument = P { leftbrace * ((identifier + V(1) + (1 - leftbrace - rightbrace))^0) * rightbrace }
local function matcherror(str,pos)
report_macros("runaway definition at: %s",sub(str,pos-30,pos))
end
local grammar = { "converter",
texcode = pushlocal
* startcode
* spaces
* (csname * spaces)^1 -- new: multiple, new:csname instead of name
-- * (declaration + furthercomment + (1 - newline - space))^0
* ((declaration * (space^0/""))^1 + furthercomment + (1 - newline - space))^0 -- accepts #a #b #c
* V("texbody")
* stopcode
* poplocal,
texbody = ( V("definition")
+ identifier
+ V("braced")
+ (1 - stopcode)
)^0,
definition = pushlocal
* definer
* escapedname
* (declaration + furthercomment + commentline + (1-leftbrace))^0
* V("braced")
* poplocal,
setcode = pushlocal
* setter
* argument
* (declaration + furthercomment + commentline + (1-leftbrace))^0
* V("braced")
* poplocal,
braced = leftbrace
* ( V("definition")
+ identifier
+ V("setcode")
+ V("texcode")
+ V("braced")
+ furthercomment
+ leadingcomment -- new per 2012-05-15 (message on mailing list)
+ nobrace
)^0
-- * rightbrace^-1, -- the -1 catches errors
* (rightbrace + Cmt(always,matcherror)),
pattern = leadingcomment
+ V("definition")
+ V("setcode")
+ V("texcode")
+ furthercomment
+ anything,
converter = V("pattern")^1,
}
local parser = Cs(grammar)
local checker = P("%") * (1 - newline - P("macros"))^0
* P("macros") * space^0 * P("=") * space^0 * C(patterns.letter^1)
-- maybe namespace
local macros = { } resolvers.macros = macros
function macros.preprocessed(str,strip)
return lpegmatch(parser,str,1,strip)
end
function macros.convertfile(oldname,newname) -- beware, no testing on oldname == newname
local data = resolvers.loadtexfile(oldname)
data = interfaces.preprocessed(data) or ""
io.savedata(newname,data)
end
function macros.version(data)
return lpegmatch(checker,data)
end
function macros.processmkvi(str,filename)
if (filename and file.suffix(filename) == "mkvi") or lpegmatch(checker,str) == "mkvi" then
local result = lpegmatch(parser,str,1,true) or str
pushtarget("log")
report_macros("processed file '%s', delta %s",filename,#str-#result)
poptarget("log")
return result
else
return str
end
end
if resolvers.schemes then
local function handler(protocol,name,cachename)
local hashed = url.hashed(name)
local path = hashed.path
if path and path ~= "" then
local str = resolvers.loadtexfile(path)
if file.suffix(path) == "mkvi" or lpegmatch(checker,str) == "mkvi" then
-- already done automatically
io.savedata(cachename,str)
else
local result = lpegmatch(parser,str,1,true) or str
pushtarget("log")
report_macros("processed scheme '%s', delta %s",filename,#str-#result)
poptarget("log")
io.savedata(cachename,result)
end
end
return cachename
end
resolvers.schemes.install('mkvi',handler,1) -- this will cache !
utilities.sequencers.appendaction(resolvers.openers.helpers.textfileactions,"system","resolvers.macros.processmkvi")
-- utilities.sequencers.disableaction(resolvers.openers.helpers.textfileactions,"resolvers.macros.processmkvi")
end
-- print(macros.preprocessed(
-- [[
-- \starttexdefinition unexpanded test #aa #bb #cc
-- test
-- \stoptexdefinition
-- ]]))
-- print(macros.preprocessed([[\def\bla#bla{bla#{bla}}]]))
-- print(macros.preprocessed([[\def\bla#bla{#{bla}bla}]]))
-- print(macros.preprocessed([[\def\blä#{blá}{blà:#{blá}}]]))
-- print(macros.preprocessed([[\def\blä#bla{blà:#bla}]]))
-- print(macros.preprocessed([[\setvalue{xx}#bla{blà:#bla}]]))
-- print(macros.preprocessed([[\def\foo#bar{\setvalue{xx#bar}{#bar}}]]))
-- print(macros.preprocessed([[\def\bla#bla{bla:#{bla}}]]))
-- print(macros.preprocessed([[\def\bla_bla#bla{bla:#bla}]]))
-- print(macros.preprocessed([[\def\test#oeps{test:#oeps}]]))
-- print(macros.preprocessed([[\def\test_oeps#oeps{test:#oeps}]]))
-- print(macros.preprocessed([[\def\test#oeps{test:#{oeps}}]]))
-- print(macros.preprocessed([[\def\test#{oeps:1}{test:#{oeps:1}}]]))
-- print(macros.preprocessed([[\def\test#{oeps}{test:#oeps}]]))
-- print(macros.preprocessed([[\def\x[#a][#b][#c]{\setvalue{\y{#a}\z{#b}}{#c}}]]))
-- print(macros.preprocessed([[\def\test#{oeps}{test:#oeps \halign{##\cr #oeps\cr}]]))
-- print(macros.preprocessed([[\def\test#{oeps}{test:#oeps \halign{##\cr #oeps\cr}}]]))
-- print(macros.preprocessed([[% test
-- \def\test#oeps{#oeps} % {test}
-- % test
--
-- % test
-- two
-- %test]]))
-- print(macros.preprocessed([[
-- \def\scrn_button_make_normal#namespace#current#currentparameter#text%
-- {\ctxlua{structures.references.injectcurrentset(nil,nil)}%
-- % \hbox attr \referenceattribute \lastreferenceattribute {\localframed[#namespace:#current]{#text}}}
-- \hbox attr \referenceattribute \lastreferenceattribute {\directlocalframed[#namespace:#current]{#text}}}
-- ]]))
--
-- print(macros.preprocessed([[
-- \def\definefoo[#name]%
-- {\setvalue{start#name}{\dostartfoo{#name}}}
-- \def\dostartfoo#name%
-- {\def\noexpand\next#content\expandafter\noexpand\csname stop#name\endcsname{#name : #content}%
-- \next}
-- \def\dostartfoo#name%
-- {\normalexpanded{\def\noexpand\next#content\expandafter\noexpand\csname stop#name\endcsname}{#name : #content}%
-- \next}
-- ]]))
--
-- print(macros.preprocessed([[
-- \def\dosomething#content{%%% {{
-- % { }{{ %%
-- \bgroup\italic#content\egroup
-- }
-- ]]))
--
-- Just an experiment:
--
-- \catcode\numexpr"10FF25=\commentcatcode %% > 110000 is invalid
--
-- We could have a push/pop mechanism but binding to txtcatcodes
-- is okay too.
local txtcatcodes = false -- also signal and yet unknown
local commentsignal = utf.char(0x10FF25)
local encodecomment = P("%%") / commentsignal --
----- encodepattern = Cs(((1-encodecomment)^0 * encodecomment)) -- strips but not nice for verbatim
local encodepattern = Cs((encodecomment + 1)^0)
local decodecomment = P(commentsignal) / "%%%%" -- why doubles here?
local decodepattern = Cs((decodecomment + 1)^0)
function resolvers.macros.encodecomment(str)
if txtcatcodes and tex.catcodetable == txtcatcodes then
return lpegmatch(encodepattern,str) or str
else
return str
end
end
function resolvers.macros.decodecomment(str) -- normally not needed
return txtcatcodes and lpegmatch(decodepattern,str) or str
end
-- resolvers.macros.commentsignal = commentsignal
-- resolvers.macros.encodecommentpattern = encodepattern
-- resolvers.macros.decodecommentpattern = decodepattern
function resolvers.macros.enablecomment(thecatcodes)
if not txtcatcodes then
txtcatcodes = thecatcodes or catcodes.numbers.txtcatcodes
utilities.sequencers.appendaction(resolvers.openers.helpers.textlineactions,"system","resolvers.macros.encodecomment")
end
end
|