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if not modules then modules = { } end modules ['lpdf-ren'] = {
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"
}
-- rendering
local tostring, tonumber, next = tostring, tonumber, next
local format = string.format
local texsprint, ctxcatcodes = tex.sprint, tex.ctxcatcodes
local nodeinjections = backends.pdf.nodeinjections
local codeinjections = backends.pdf.codeinjections
local registrations = backends.pdf.registrations
jobreferences = jobreferences or { }
--~ jobreferences.runners = jobreferences.runners or { }
--~ jobreferences.specials = jobreferences.specials or { }
--~ jobreferences.handlers = jobreferences.handlers or { }
jobreferences.executers = jobreferences.executers or { }
--~ local runners = jobreferences.runners
--~ local specials = jobreferences.specials
--~ local handlers = jobreferences.handlers
local executers = jobreferences.executers
local variables = interfaces.variables
local pdfconstant = lpdf.constant
local pdfdictionary = lpdf.dictionary
local pdfarray = lpdf.array
local pdfreference = lpdf.reference
local pdfflushobject = lpdf.flushobject
local pdf_ocg = pdfconstant("OCG")
local pdf_ocmd = pdfconstant("OCMD")
local pdf_off = pdfconstant("OFF")
local pdf_on = pdfconstant("ON")
local pdf_toggle = pdfconstant("Toggle")
local pdf_setocgstate = pdfconstant("SetOCGState")
local lpdf_usage = pdfdictionary { Print = pdfdictionary { PrintState = pdfconstant("OFF") } }
local pdfln, pdfld = { }, { }
local textlayers, hidelayers, videlayers = pdfarray(), pdfarray(), pdfarray()
local pagelayers = pdfdictionary()
lpdf.layerreferences = pdfln
function backends.pdf.layerreference(name)
return pdfln[name]
end
function codeinjections.defineviewerlayer(specification)
if textlayers then
local tag = specification.tag
-- todo: reserve
local n = pdfdictionary {
Type = pdf_ocg,
Name = specification.title or "unknown",
Intent = ((specification.kind > 0) and pdf_design) or nil, -- disable layer hiding by user
Usage = ((specification.printable == variables.no) and lpdf_usage) or nil , -- printable or not
}
local nr = pdfreference(pdfflushobject(n))
pdfln[tag] = nr -- was n
local d = pdfdictionary {
Type = pdf_ocmd,
OCGs = pdfarray { nr },
}
local dr = pdfreference(pdfflushobject(d))
pdfld[tag] = dr
textlayers[#textlayers+1] = nr
if specification.visible == variables.start then
videlayers[#videlayers+1] = nr
else
hidelayers[#hidelayers+1] = nr
end
pagelayers[tag] = dr -- check
end
end
local function flushtextlayers()
if textlayers and #textlayers > 0 then
local d = pdfdictionary {
OCGs = textlayers,
D = pdfdictionary {
Order = textlayers,
ON = videlayers,
OFF = hidelayers,
},
}
lpdf.addtocatalog("OCProperties",d)
textlayers = nil
end
end
local function flushpagelayers()
if next(pagelayers) then
lpdf.addtopageresources("Properties",pagelayers)
end
end
lpdf.registerpagefinalizer (flushpagelayers)
lpdf.registerdocumentfinalizer(flushtextlayers)
local function setlayer(what,arguments)
-- maybe just a gmatch of even better, earlier in lpeg
arguments = (type(arguments) == "table" and arguments) or aux.settings_to_array(arguments)
local state = pdfarray { what }
for i=1,#arguments do
local p = pdfln[arguments[i]]
if p then
state[#state+1] = p
end
end
return pdfdictionary {
S = pdf_setocgstate,
State = state,
}
end
function executers.hidelayer (arguments) setlayer(pdf_off, arguments) end
function executers.videlayer (arguments) setlayer(pdf_on, arguments) end
function executers.togglelayer(arguments) setlayer(pdf_toggle,arguments) end
-- transitions
local pagetransitions = {
{"split","in","vertical"}, {"split","in","horizontal"},
{"split","out","vertical"}, {"split","out","horizontal"},
{"blinds","horizontal"}, {"blinds","vertical"},
{"box","in"}, {"box","out"},
{"wipe","east"}, {"wipe","west"}, {"wipe","north"}, {"wipe","south"},
{"dissolve"},
{"glitter","east"}, {"glitter","south"},
{"fly","in","east"}, {"fly","in","west"}, {"fly","in","north"}, {"fly","in","south"},
{"fly","out","east"}, {"fly","out","west"}, {"fly","out","north"}, {"fly","out","south"},
{"push","east"}, {"push","west"}, {"push","north"}, {"push","south"},
{"cover","east"}, {"cover","west"}, {"cover","north"}, {"cover","south"},
{"uncover","east"}, {"uncover","west"}, {"uncover","north"}, {"uncover","south"},
{"fade"},
}
local mapping = {
split = { "S" , pdfconstant("Split") },
blinds = { "S" , pdfconstant("Blinds") },
box = { "S" , pdfconstant("Box") },
wipe = { "S" , pdfconstant("Wipe") },
dissolve = { "S" , pdfconstant("Dissolve") },
glitter = { "S" , pdfconstant("Glitter") },
replace = { "S" , pdfconstant("R") },
fly = { "S" , pdfconstant("Fly") },
push = { "S" , pdfconstant("Push") },
cover = { "S" , pdfconstant("Cover") },
uncover = { "S" , pdfconstant("Uncover") },
fade = { "S" , pdfconstant("Fade") },
horizontal = { "Dm" , pdfconstant("H") },
vertical = { "Dm" , pdfconstant("V") },
["in"] = { "M" , pdfconstant("I") },
out = { "M" , pdfconstant("O") },
east = { "Di" , 0 },
north = { "Di" , 90 },
west = { "Di" , 180 },
south = { "Di" , 270 },
}
local last = 0
-- n: number, "stop", "reset", "random", "a,b,c" delay: number, "none"
function codeinjections.setpagetransition(specification)
local n, delay = specification.n, specification.delay
if n == variables.auto then
if last >= #pagetransitions then
last = 0
end
n = last + 1
elseif n == variables.stop then
return
elseif n == variables.reset then
last = 0
return
elseif n == variables.random then
n = math.random(1,#pagetransitions)
else
n = tonumber(n)
end
local t = n and pagetransitions[n] or pagetransitions[1]
if not t then
t = aux.settings_to_array(n)
end
if t and #t > 0 then
local d = pdfdictionary()
for i=1,#t do
local m = mapping[t[i]]
d[m[1]] = m[2]
end
delay = tonumber(delay)
if delay and delay > 0 then
lpdf.addtopageattributes("Dur",delay)
end
lpdf.addtopageattributes("Trans",d)
end
end
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