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if not modules then modules = { } end modules ['syst-aux'] = {
version = 1.001,
comment = "companion to syst-aux.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- slower than lpeg:
--
-- utfmatch(str,"(.?)(.*)$")
-- utf.sub(str,1,1)
local tonumber = tonumber
local utfsub = utf.sub
local P, S, R, C, Cc, Cs, Carg, lpegmatch = lpeg.P, lpeg.S, lpeg.R, lpeg.C, lpeg.Cc, lpeg.Cs, lpeg.Carg, lpeg.match
local context = context
local implement = interfaces.implement
local formatters = string.formatters
local setcatcode = tex.setcatcode
local utf8character = lpeg.patterns.utf8character
local settings_to_array = utilities.parsers.settings_to_array
local setmacro = interfaces.setmacro
local pattern = C(utf8character^-1) * C(P(1)^0)
implement {
name = "getfirstcharacter",
arguments = "string",
actions = function(str)
local first, rest = lpegmatch(pattern,str)
setmacro("firstcharacter",first)
setmacro("remainingcharacters",rest)
end
}
implement {
name = "thefirstcharacter",
arguments = "string",
actions = function(str)
local first, rest = lpegmatch(pattern,str)
context(first)
end
}
implement {
name = "theremainingcharacters",
arguments = "string",
actions = function(str)
local first, rest = lpegmatch(pattern,str)
context(rest)
end
}
local pattern = C(utf8character^-1)
local ctx_doifelse = commands.doifelse
implement {
name = "doifelsefirstchar",
arguments = { "string", "string" },
actions = function(str,chr)
ctx_doifelse(lpegmatch(pattern,str) == chr)
end
}
implement {
name = "getsubstring",
arguments = { "string", "string", "string" },
actions = function(str,first,last)
context(utfsub(str,tonumber(first),tonumber(last)))
end
}
-- function commands.addtocommalist(list,item)
-- if list == "" then
-- context(item)
-- else
-- context("%s,%s",list,item) -- using tex.print is some 10% faster
-- end
-- end
--
-- function commands.removefromcommalist(list,item)
-- if list == "" then
-- context(item)
-- else
-- -- okay, using a proper lpeg is probably faster
-- -- we could also check for #l = 1
-- local l = settings_to_array(list)
-- local t, n = { }
-- for i=1,#l do
-- if l[i] ~= item then
-- n = n + 1
-- t[n] = item
-- end
-- end
-- if n == 0 then
-- context(item)
-- else
-- context(concat(list,","))
-- end
-- end
-- end
local pattern = (C((1-P("%"))^1) * Carg(1)) / function(n,d)
return formatters["%.0fsp"](d * tonumber(n)/100) end * P("%") * P(-1) -- .0 ?
-- percentageof("10%",65536*10)
implement {
name = "percentageof",
arguments = { "string", "dimen" },
actions = function(str,dim)
context(lpegmatch(pattern,str,1,dim) or str)
end
}
-- \gdef\setpercentdimen#1#2%
-- {#1=\ctxcommand{percentageof("#2",\number#1)}\relax}
local spaces = P(" ")^0 / ""
local nohash = 1 - P("#")
local digit = R("09")
local double = P("##") / "#"
local single = P("#")
local sentinel = spaces * (nohash^1 / "\\%0")
local sargument = (single * digit)^1
local dargument = (double * digit)^1
local usespaces = nil
local texpreamble = nil
local pattern = Cs( -- ^-1
( P("spaces") / function() usespaces = true return "" end )^0
* spaces
* ( P("nospaces") / function() usespaces = false return "" end )^0
* spaces
* ( P("global") / "\\global" )^0
* spaces
* ( P("unexpanded") / "\\unexpanded" )^0
* spaces
* Cc("\\expandafter\\")
* spaces
* ( P("expanded") / "e" )^0
* spaces
* ( P((1-S(" #"))^1) / "def\\csname %0\\endcsname" )
* spaces
* (
-- (double * digit)^1 * sentinel^-1 * double^-1
-- + (single * digit)^1 * sentinel^-1 * single^-1
( P("[") * dargument * P("]") + dargument)^1 * sentinel^-1 * double^-1
+ ( P("[") * sargument * P("]") + sargument)^1 * sentinel^-1 * single^-1
+ sentinel^-1 * (double+single)^-1
)
)
local ctx_dostarttexdefinition = context.dostarttexdefinition
local function texdefinition_one(str)
usespaces = nil
texpreamble = lpegmatch(pattern,str)
if usespaces == true then
setcatcode(32,10) -- space
setcatcode(13, 5) -- endofline
elseif usespaces == false then
setcatcode(32, 9) -- ignore
setcatcode(13, 9) -- ignore
else
-- this is default
-- setcatcode(32,10) -- space
-- setcatcode(13, 9) -- ignore
end
ctx_dostarttexdefinition()
end
local function texdefinition_two()
context(texpreamble)
end
implement { name = "texdefinition_one", actions = texdefinition_one, scope = "private", arguments = "string" }
implement { name = "texdefinition_two", actions = texdefinition_two, scope = "private" }
implement { name = "upper", arguments = "string", actions = { utf.upper, context } }
implement { name = "lower", arguments = "string", actions = { utf.lower, context } }
implement { name = "strip", arguments = "string", actions = { string.strip, context } } -- or utf.strip
implement {
name = "converteddimen",
arguments = { "dimen", "string" },
actions = function(dimen,unit)
context(number.todimen(dimen,unit or "pt","%0.5f")) -- no unit appended (%F)
end
}
-- where, not really the best spot for this:
implement {
name = "immediatemessage",
arguments = { "'message'", "string" },
actions = logs.status
}
implement {
name = "resettimer",
actions = function()
statistics.resettiming("whatever")
statistics.starttiming("whatever")
end
}
implement {
name = "elapsedtime",
actions = function()
statistics.stoptiming("whatever")
context(statistics.elapsedtime("whatever"))
end
}
local accuracy = table.setmetatableindex(function(t,k)
local v = formatters["%0." ..k .. "f"]
t[k] = v
return v
end)
implement {
name = "rounded",
arguments = "integer",
actions = function(n,m) context(accuracy[n](m)) end
}
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