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Diffstat (limited to 'tex/context/base/lpdf-ren.lua')
| -rw-r--r-- | tex/context/base/lpdf-ren.lua | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/tex/context/base/lpdf-ren.lua b/tex/context/base/lpdf-ren.lua new file mode 100644 index 000000000..e6bbd67fe --- /dev/null +++ b/tex/context/base/lpdf-ren.lua @@ -0,0 +1,207 @@ +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 |