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if not modules then modules = { } end modules ['syst-lua'] = {
version = 1.001,
comment = "companion to syst-lua.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format, find, match, rep = string.format, string.find, string.match, string.rep
local tonumber = tonumber
local S, lpegmatch, lpegtsplitat = lpeg.S, lpeg.match, lpeg.tsplitat
local context = context
commands = commands or { }
function commands.writestatus(...) logs.status(...) end -- overloaded later
-- todo: use shorter names i.e. less tokenization, like prtcatcodes + f_o_t_a
local firstoftwoarguments = context.firstoftwoarguments -- context.constructcsonly("firstoftwoarguments" )
local secondoftwoarguments = context.secondoftwoarguments -- context.constructcsonly("secondoftwoarguments")
local firstofoneargument = context.firstofoneargument -- context.constructcsonly("firstofoneargument" )
local gobbleoneargument = context.gobbleoneargument -- context.constructcsonly("gobbleoneargument" )
local function testcase(b)
if b then
firstoftwoarguments()
else
secondoftwoarguments()
end
end
function commands.doif(b)
if b then
firstofoneargument()
else
gobbleoneargument()
end
end
function commands.doifnot(b)
if b then
gobbleoneargument()
else
firstofoneargument()
end
end
commands.testcase = testcase
commands.doifelse = testcase
function commands.boolcase(b)
context(b and 1 or 0)
end
function commands.doifelsespaces(str)
return testcase(find(str,"^ +$"))
end
local s = lpegtsplitat(",")
local h = { }
function commands.doifcommonelse(a,b)
local ha = h[a]
local hb = h[b]
if not ha then ha = lpegmatch(s,a) h[a] = ha end
if not hb then hb = lpegmatch(s,b) h[b] = hb end
for i=1,#ha do
for j=1,#hb do
if ha[i] == hb[j] then
return testcase(true)
end
end
end
return testcase(false)
end
function commands.doifinsetelse(a,b)
local hb = h[b]
if not hb then hb = lpegmatch(s,b) h[b] = hb end
for i=1,#hb do
if a == hb[i] then
return testcase(true)
end
end
return testcase(false)
end
local pattern = lpeg.patterns.validdimen
function commands.doifdimenstringelse(str)
testcase(lpegmatch(pattern,str))
end
function commands.firstinlist(str)
local first = match(str,"^([^,]+),")
context(first or str)
end
function commands.ntimes(str,n)
context(rep(str,n or 1))
end
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