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if not modules then modules = { } end modules ['lpdf-xmp'] = {
version = 1.001,
comment = "companion to lpdf-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format, random, char, gsub = string.format, math.random, string.char, string.gsub
local xmlfillin = xml.fillin
local trace_xmp = false trackers.register("backend.xmp", function(v) trace_xmp = v end)
local xmpmetadata = [[
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2.1-c043 52.372728, 2009/01/18-15:08:04">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<rdf:Description rdf:about="" xmlns:dc="http://purl.org/dc/elements/1.1/">
<dc:format>application/pdf</dc:format>
<dc:creator>
<rdf:Seq>
<rdf:li/>
</rdf:Seq>
</dc:creator>
<dc:title>
<rdf:Alt>
<rdf:li xml:lang="x-default"/>
</rdf:Alt>
</dc:title>
</rdf:Description>
<rdf:Description rdf:about="" xmlns:pdfx="http://ns.adobe.com/pdfx/1.3/">
<pdfx:ConTeXt.Jobname/>
<pdfx:ConTeXt.Time/>
<pdfx:ConTeXt.Url/>
<pdfx:ConTeXt.Version/>
<pdfx:ID/>
<pdfx:PTEX.Fullbanner/>
</rdf:Description>
<rdf:Description rdf:about="" xmlns:xmp="http://ns.adobe.com/xap/1.0/">
<xmp:CreateDate/>
<xmp:CreatorTool/>
<xmp:ModifyDate/>
<xmp:MetadataDate/>
</rdf:Description>
<rdf:Description rdf:about="" xmlns:pdf="http://ns.adobe.com/pdf/1.3/">
<pdf:Producer/>
<pdf:Trapped/>
</rdf:Description>
<rdf:Description rdf:about="" xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/">
<xmpMM:DocumentID/>
<xmpMM:InstanceID/>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>
]]
-- i wonder why this begin end is empty / w (no time now to look into it)
local xpacket = [[
<?xpacket begin="" id="%s"?>
%s
<?xpacket end="w"?>]]
local mapping = {
["Creator"] = "rdf:Description/dc:creator/rdf:Seq/rdf:li",
["Title"] = "rdf:Description/dc:title/rdf:Alt/rdf:li",
["ConTeXt.Jobname"] = "rdf:Description/pdfx:ConTeXt.Jobname",
["ConTeXt.Time"] = "rdf:Description/pdfx:ConTeXt.Time",
["ConTeXt.Url"] = "rdf:Description/pdfx:ConTeXt.Url",
["ConTeXt.Version"] = "rdf:Description/pdfx:ConTeXt.Version",
["ID"] = "rdf:Description/pdfx:ID",
["PTEX.Fullbanner"] = "rdf:Description/pdfx:PTEX.Fullbanner",
["CreateDate"] = "rdf:Description/xmp:CreateDate",
["CreatorTool"] = "rdf:Description/xmp:CreatorTool",
["ModifyDate"] = "rdf:Description/xmp:ModifyDate",
["MetadataDate"] = "rdf:Description/xmp:MetadataDate",
["Producer"] = "rdf:Description/pdf:Producer",
["Trapped"] = "rdf:Description/pdf:Trapped",
["DocumentID"] = "rdf:Description/xmpMM:DocumentID",
["InstanceID"] = "rdf:Description/xmpMM:InstanceID",
}
local xmp = xml.convert(xmpmetadata)
local addtoinfo = lpdf.addtoinfo
local function addxmpinfo(tag,value,check)
local pattern = mapping[tag]
if pattern then
xmlfillin(xmp,pattern,value,check)
end
end
function lpdf.addtoinfo(tag,pdfvalue,strvalue)
addtoinfo(tag,pdfvalue)
addxmpinfo(tag,strvalue or gsub(tostring(pdfvalue),"^%((.*)%)$","%1")) -- hack
end
lpdf.addxmpinfo = addxmpinfo
local t = { } for i=1,24 do t[i] = random() end
local function flushxmpinfo()
commands.freezerandomseed(os.clock()) -- hack
local t = { } for i=1,24 do t[i] = char(96 + random(26)) end
local packetid = table.concat(t)
local time = os.date("!%Y-%m-%dT%X") -- ! -> universaltime
addxmpinfo("Producer",format("LuaTeX-%0.2f.%s",tex.luatexversion/100,tex.luatexrevision))
addxmpinfo("DocumentID",format("uuid:%s",os.uuid()))
addxmpinfo("InstanceID",format("uuid:%s",os.uuid()))
addxmpinfo("CreatorTool","LuaTeX + ConTeXt MkIV")
addxmpinfo("CreateDate",time)
addxmpinfo("ModifyDate",time)
addxmpinfo("MetadataDate",time)
local blob = xml.tostring(xmp)
local md = lpdf.dictionary {
Subtype = lpdf.constant("XML"),
Type = lpdf.constant("Metadata"),
}
if trace_xmp then
commands.writestatus("system","xmp data flushed (see log file)")
texio.write_nl("log","")
texio.write("log","\n% ",(gsub(blob,"[\r\n]","\n%% ")),"\n")
end
-- if true then
-- commands.writestatus("system","xmp data not flushed (needs luatex upgrade)")
-- else
-- lpdf.addtocatalog("Metadata",lpdf.reference(pdf.immediateobj("stream",format(xpacket,packetid,blob),md())))
local r = pdf.obj {
immediate = true,
compresslevel = 0,
type = "stream",
string = format(xpacket,packetid,blob),
attr = md(),
}
lpdf.addtocatalog("Metadata",lpdf.reference(r))
-- end
commands.defrostrandomseed() -- hack
end
-- his will be enabled when we can inhibit compression for a stream at the lua end
lpdf.registerdocumentfinalizer(flushxmpinfo,3)
--~ lpdf.addxmpinfo("creator", "PRAGMA ADE: Hans Hagen and/or Ton Otten")
--~ lpdf.addxmpinfo("title", "oeps")
--~ lpdf.addxmpinfo("ConTeXt.Jobname", "oeps")
--~ lpdf.addxmpinfo("ConTeXt.Time", "2009.10.30 17:53")
--~ lpdf.addxmpinfo("ConTeXt.Url", "www.pragma-ade.com")
--~ lpdf.addxmpinfo("ConTeXt.Version", "2009.10.30 16:59")
--~ lpdf.addxmpinfo("ID", "oeps.20091030.1753")
--~ lpdf.addxmpinfo("PTEX.Fullbanner", "This is LuaTeX, Version beta-0.44.0-2009103014 (Web2C 2009) kpathsea version 5.0.0")
--~ lpdf.addxmpinfo("CreateDate", "2009-10-30T17:53:39+01:00")
--~ lpdf.addxmpinfo("CreatorTool", "ConTeXt - 2009.10.30 16:59")
--~ lpdf.addxmpinfo("ModifyDate", "2009-10-30T19:38:18+01:00")
--~ lpdf.addxmpinfo("MetadataDate", "2009-10-30T19:38:18+01:00")
--~ lpdf.addxmpinfo("Producer", "LuaTeX-0.44.0")
--~ lpdf.addxmpinfo("Trapped", "False")
--~ lpdf.addxmpinfo("DocumentID", "uuid:d9f1383c-e069-4619-bee0-c978d9495d7d")
--~ lpdf.addxmpinfo("InstanceID", "uuid:67eda265-8146-4cce-a1a2-1ec91819ad73")
--~ print(lpdf.flushxmpinfo())
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