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if not modules then modules = { } end modules ['java-ini'] = {
version = 1.001,
comment = "companion to java-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format = string.format
local concat = table.concat
local lpegmatch, lpegP, lpegR, lpegS, lpegC = lpeg.match, lpeg.P, lpeg.R, lpeg.S, lpeg.C
local allocate = utilities.storage.allocate
local variables = interfaces.variables
-- todo: don't flush scripts if no JS key
local trace_javascript = false trackers.register("backends.javascript", function(v) trace_javascript = v end)
local report_javascript = logs.new("javascript")
interactions.javascripts = interactions.javascripts or { }
local javascripts = interactions.javascripts
javascripts.codes = allocate()
javascripts.preambles = allocate()
javascripts.functions = allocate()
local codes, preambles, functions = javascripts.codes, javascripts.preambles, javascripts.functions
local preambled = { }
local function storefunction(s)
functions[s] = true
end
local uses = lpegP("uses")
local used = lpegP("used")
local left = lpegP("{")
local right = lpegP("}")
local space = lpegS(" \r\n")
local spaces = space^0
local braced = left * lpegC((1-right-space)^1) * right
local unbraced = lpegC((1-space)^1)
local name = spaces * (braced + unbraced) * spaces
local any = lpegP(1)
local script = lpegC(any^1)
local funct = lpegP("function")
local leftp = lpegP("(")
local rightp = lpegP(")")
local fname = spaces * funct * spaces * (((1-space-left)^1)/storefunction) * spaces * leftp
local parsecode = name * ((uses * name) + lpeg.Cc("")) * spaces * script
local parsepreamble = name * ((used * name) + lpeg.Cc("")) * spaces * script
local parsefunctions = (fname + any)^0
function javascripts.storecode(str)
local name, uses, script = lpegmatch(parsecode,str)
if name and name ~= "" then
codes[name] = { uses, script }
end
end
function javascripts.storepreamble(str) -- now later
local name, used, script = lpegmatch(parsepreamble,str)
if name and name ~= "" and not preambled[name] then
local n = #preambles + 1
preambles[n] = { name, used, script }
preambled[name] = n
if trace_javascript then
report_javascript("storing preamble '%s', state '%s', order '%s'",name,used,n)
end
lpegmatch(parsefunctions,script)
end
end
function javascripts.setpreamble(name,script) -- now later
if name and name ~= "" and not preambled[name] then
local n = #preambles + 1
preambles[n] = { name, "now", script }
preambled[name] = n
if trace_javascript then
report_javascript("setting preamble '%s', state 'now', order '%s'",name,n)
end
lpegmatch(parsefunctions,script)
end
end
function javascripts.addtopreamble(name,script) -- now later
if name and name ~= "" then
local p = preambled[name]
if p then
preambles[p] = { "now", preambles[p] .. " ;\n" .. script }
if trace_javascript then
report_javascript("extending preamble '%s', state 'now'",name)
end
else
local n = #preambles + 1
preambles[n] = { name, "now", script }
preambled[name] = n
if trace_javascript then
report_javascript("storing preamble '%s', state 'now', order '%s'",name,n)
end
lpegmatch(parsefunctions,script)
end
end
end
function javascripts.usepreamblenow(name) -- now later
if name and name ~= "" and name ~= variables.reset then -- todo: reset
local names = utilities.parsers.settings_to_array(name)
for i=1,#names do
local somename = names[i]
if not preambled[somename] then
preambles[preambled[somename]][2] = "now"
if trace_javascript then
report_javascript("using preamble '%s', state 'now'",somename)
end
end
end
end
end
local splitter = lpeg.Ct(lpeg.splitat(lpeg.patterns.commaspacer))
local used, reported = false, { } -- we can cache more
function javascripts.code(name,arguments)
local c = codes[name]
if c then
local u, code = c[1], c[2]
if u ~= "" then
local p = preambled[u]
if p then
preambles[p][2] = "now"
if trace_javascript and not reported[name] then
reported[name] = true
report_javascript("using code '%s', preamble '%s'",name,u)
end
elseif trace_javascript and not reported[name] then
reported[name] = true
report_javascript("using code '%s'",name)
end
elseif trace_javascript and not reported[name] then
reported[name] = true
report_javascript("using code '%s'",name)
end
used = true
return code
end
local f = functions[name]
if f then
used = true
if trace_javascript and not reported[name] then
reported[name] = true
report_javascript("using function '%s'",name)
end
if arguments then
local args = lpegmatch(splitter,arguments)
for i=1,#args do -- can be a helper
args[i] = format("%q",args[i])
end
return format("%s(%s)",name,concat(args,","))
else
return format("%s()",name)
end
end
end
function javascripts.flushpreambles()
local t = { }
if used then
for i=1,#preambles do
local preamble = preambles[i]
if preamble[2] == "now" then
if trace_javascript then
report_javascript("flushing preamble '%s'",preamble[1])
end
t[#t+1] = { preamble[1], preamble[3] }
end
end
end
return t
end
local patterns = { "java-imp-%s.mkiv", "java-imp-%s.tex", "java-%s.mkiv", "java-%s.tex" }
function javascripts.usescripts(name)
if name ~= variables.reset then
commands.uselibrary(name,patterns,function(name,foundname)
context.startnointerference()
context.startreadingfile()
context.input(foundname)
context.showcolormessage("javascript",1,name)
context.stopreadingfile()
context.stopnointerference()
end)
end
end
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