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if not modules then modules = { } end modules ['lpdf-nod'] = {
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 = string.format
local copy_node = node.copy
local new_node = node.new
local nodepool = nodes.pool
local register = nodepool.register
local whatsitcodes = nodes.whatsitcodes
local nodeinjections = backends.nodeinjections
local pdfliteral = register(new_node("whatsit", whatsitcodes.pdfliteral)) pdfliteral.mode = 1
local pdfsave = register(new_node("whatsit", whatsitcodes.pdfsave))
local pdfrestore = register(new_node("whatsit", whatsitcodes.pdfrestore))
local pdfsetmatrix = register(new_node("whatsit", whatsitcodes.pdfsetmatrix))
local pdfdest = register(new_node("whatsit", whatsitcodes.pdfdest)) pdfdest.named_id = 1 -- xyz_zoom untouched
local pdfannot = register(new_node("whatsit", whatsitcodes.pdfannot))
local variables = interfaces.variables
local views = { -- beware, we do support the pdf keys but this is *not* official
xyz = 0, [variables.standard] = 0,
fit = 1, [variables.fit] = 1,
fith = 2, [variables.width] = 2,
fitv = 3, [variables.height] = 3,
fitb = 4,
fitbh = 5, [variables.minwidth] = 5,
fitbv = 6, [variables.minheight] = 6,
fitr = 7,
}
function nodepool.pdfliteral(str)
local t = copy_node(pdfliteral)
t.data = str
return t
end
function nodepool.pdfdirect(str)
local t = copy_node(pdfliteral)
t.data = str
t.mode = 1
return t
end
function nodepool.pdfsave()
return copy_node(pdfsave)
end
function nodepool.pdfrestore()
return copy_node(pdfrestore)
end
function nodepool.pdfsetmatrix(rx,sx,sy,ry,tx,ty)
local t = copy_node(pdfsetmatrix)
t.data = format("%s %s %s %s",rx or 0,sx or 0,sy or 0,ry or 0) -- todo: tx ty
return t
end
nodeinjections.save = nodepool.pdfsave
nodeinjections.restore = nodepool.pdfrestore
nodeinjections.transform = nodepool.pdfsetmatrix
function nodepool.pdfannotation(w,h,d,data,n)
local t = copy_node(pdfannot)
if w and w ~= 0 then
t.width = w
end
if h and h ~= 0 then
t.height = h
end
if d and d ~= 0 then
t.depth = d
end
if n then
t.objnum = n
end
if data and data ~= "" then
t.data = data
end
return t
end
-- (!) The next code in pdfdest.w is wrong:
--
-- case pdf_dest_xyz:
-- if (matrixused()) {
-- set_rect_dimens(pdf, p, parent_box, cur, alt_rule, pdf_dest_margin) ;
-- } else {
-- pdf_ann_left(p) = pos.h ;
-- pdf_ann_top (p) = pos.v ;
-- }
-- break ;
--
-- so we need to force a matrix.
function nodepool.pdfdestination(w,h,d,name,view,n)
local t = copy_node(pdfdest)
local hasdimensions = false
if w and w ~= 0 then
t.width = w
hasdimensions = true
end
if h and h ~= 0 then
t.height = h
hasdimensions = true
end
if d and d ~= 0 then
t.depth = d
hasdimensions = true
end
if n then
t.objnum = n
end
view = views[view] or view or 1 -- fit is default
t.dest_id = name
t.dest_type = view
if hasdimensions and view == 0 then -- xyz
-- see (!) s -> m -> t -> r
local s = copy_node(pdfsave)
local m = copy_node(pdfsetmatrix)
local r = copy_node(pdfrestore)
m.data = format("1 0 0 1")
s.next = m m.next = t t.next = r
m.prev = s t.prev = m r.prev = t
return s -- a list
else
return t
end
end
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