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if not modules then modules = { } end modules ['core-env'] = {
version = 1.001,
comment = "companion to core-env.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- maybe this will move to the context name space although the
-- plurals are unlikely to clash with future tex primitives
--
-- if tex.modes['xxxx'] then .... else .... end
local rawset = rawset
local P, C, S, lpegmatch, patterns = lpeg.P, lpeg.C, lpeg.S, lpeg.match, lpeg.patterns
local context = context
local ctxcore = context.core
local texgetcount = tex.getcount
local allocate = utilities.storage.allocate
local setmetatableindex = table.setmetatableindex
local setmetatablenewindex = table.setmetatablenewindex
local setmetatablecall = table.setmetatablecall
local createtoken = token.create
local isdefined = tokens.isdefined
texmodes = allocate { } tex.modes = texmodes
texsystemmodes = allocate { } tex.systemmodes = texsystemmodes
texconstants = allocate { } tex.constants = texconstants
texconditionals = allocate { } tex.conditionals = texconditionals
texifs = allocate { } tex.ifs = texifs
texisdefined = allocate { } tex.isdefined = texisdefined
local modes = { }
local systemmodes = { }
-- we could use the built-in tex.is[count|dimen|skip|toks] here but caching
-- at the lua end is not that bad (and we need more anyway)
local cache = tokens.cache
-- we can have a modes cache too
local iftrue = cache["iftrue"].mode
local dimencode = cache["scratchdimen"] .command -- tokens.commands.assign_dimen
local countcode = cache["scratchcounter"] .command -- tokens.commands.assign_int
local tokencode = cache["scratchtoken"] .command -- tokens.commands.assign_toks
local skipcode = cache["scratchskip"] .command -- tokens.commands.assign_glue
local muskipcode = cache["scratchmuskip"] .command -- tokens.commands.assign_mu_glue
----- attributecode = cache["scratchattribute"].command -- tokens.commands.assign_attr
local conditioncode = cache["iftrue"] .command -- tokens.commands.if_test
local types = {
[dimencode] = "dimen",
[countcode] = "count",
[tokencode] = "token",
[skipcode] = "skip",
[muskipcode] = "muskip",
-- [attributecode] = "attribute",
[conditioncode] = "condition"
}
setmetatableindex(texmodes, function(t,k)
local m = modes[k]
if m then
return m()
elseif k then
local n = "mode>" .. k
if isdefined(n) then
rawset(modes,k, function() return texgetcount(n) == 1 end)
return texgetcount(n) == 1 -- 2 is prevented
else
return false
end
else
return false
end
end)
setmetatablenewindex(texmodes, function(t,k)
report_mode("you cannot set the %s named %a this way","mode",k)
end)
setmetatableindex(texsystemmodes, function(t,k)
local m = systemmodes[k]
if m then
return m()
else
local n = "mode>*" .. k
if isdefined(n) then
rawset(systemmodes,k,function() return texgetcount(n) == 1 end)
return texgetcount(n) == 1 -- 2 is prevented
else
return false
end
end
end)
setmetatablenewindex(texsystemmodes, function(t,k)
report_mode("you cannot set the %s named %a this way","systemmode",k)
end)
setmetatableindex(texconstants, function(t,k)
return cache[k].mode ~= 0 and texgetcount(k) or 0
end)
setmetatablenewindex(texconstants, function(t,k)
report_mode("you cannot set the %s named %a this way","constant",k)
end)
setmetatableindex(texconditionals, function(t,k) -- 0 == true
return cache[k].mode ~= 0 and texgetcount(k) == 0
end)
setmetatablenewindex(texconditionals, function(t,k)
report_mode("you cannot set the %s named %a this way","conditional",k)
end)
table.setmetatableindex(texifs, function(t,k)
return cache[k].mode == iftrue
end)
setmetatablenewindex(texifs, function(t,k)
-- just ignore
end)
if CONTEXTLMTXMODE > 0 then
iftrue = cache["iftrue"].index
-- if we really need performance we can have a dedicated cache for each
-- kind of variable
setmetatableindex(texconstants, function(t,k)
return cache[k].command == countcode and texgetcount(k) or 0
end)
setmetatableindex(texconditionals, function(t,k) -- 0 == true
return cache[k].command == countcode and texgetcount(k) == 0
end)
table.setmetatableindex(texifs, function(t,k)
local c = cache[k]
print(k)
inspect(c)
return c.command == conditioncode and c.index == iftrue
end)
end
tex.isdefined = isdefined
function tex.isdimen(name)
local hit = cache[name]
return hit.command == dimencode and hit.index or true
end
function tex.iscount(name)
local hit = cache[name]
return hit.command == countcode and hit.index or true
end
function tex.istoken(name)
local hit = cache[name]
return hit.command == tokencode and hit.index or true
end
function tex.isskip(name)
local hit = cache[name]
return hit.command == skipcode and hit.index or true
end
function tex.ismuskip(name)
local hit = cache[name]
return hit.command == muskipcode and hit.index or true
end
function tex.type(name)
return types[cache[name].command] or "macro"
end
function context.setconditional(name,value)
if value then
ctxcore.settruevalue(name)
else
ctxcore.setfalsevalue(name)
end
end
function context.setmode(name,value)
if value then
ctxcore.setmode(name)
else
ctxcore.resetmode(name)
end
end
function context.setsystemmode(name,value)
if value then
ctxcore.setsystemmode(name)
else
ctxcore.resetsystemmode(name)
end
end
context.modes = texmodes
context.systemmodes = texsystemmodes
context.conditionals = texconditionals
-------.constants = texconstants
-------.ifs = texifs
local sep = S("), ")
local str = C((1-sep)^1)
local tag = P("(") * C((1-S(")" ))^1) * P(")")
local arg = P("(") * C((1-S("){"))^1) * P("{") * C((1-P("}"))^0) * P("}") * P(")")
local pattern = (
P("lua") * tag / ctxcore.luasetup
+ P("xml") * arg / ctxcore.setupwithargument -- or xmlw as xmlsetup has swapped arguments
+ (P("tex") * tag + str) / ctxcore.texsetup
+ sep^1
)^1
interfaces.implement {
name = "autosetups",
actions = function(str) lpegmatch(pattern,str) end,
arguments = "string"
}
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