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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/latex/contrib/tagpdf/tagpdf.lua
Initial commit
Diffstat (limited to 'macros/latex/contrib/tagpdf/tagpdf.lua')
-rw-r--r--macros/latex/contrib/tagpdf/tagpdf.lua633
1 files changed, 633 insertions, 0 deletions
diff --git a/macros/latex/contrib/tagpdf/tagpdf.lua b/macros/latex/contrib/tagpdf/tagpdf.lua
new file mode 100644
index 0000000000..e3b2373bc0
--- /dev/null
+++ b/macros/latex/contrib/tagpdf/tagpdf.lua
@@ -0,0 +1,633 @@
+-- tagpdf.lua
+-- Ulrike Fischer
+
+local ProvidesLuaModule = {
+ name = "tagpdf",
+ version = "0.61", --TAGVERSION
+ date = "2019-07-02", --TAGDATE
+ description = "tagpdf lua code",
+ license = "The LATEX Project Public License 1.3c"
+}
+
+if luatexbase and luatexbase.provides_module then
+ luatexbase.provides_module (ProvidesLuaModule)
+end
+
+--[[
+The code has quite probably a number of problems
+ - more variables should be local instead of global
+ - the naming is not always consistent due to the development of the code
+ - the traversing of the shipout box must be tested with more complicated setups
+ - it should probably handle more node types
+ -
+--]]
+
+
+
+--[[
+the main table is named uftag. It contains the functions and also the data
+collected during the compilation.
+
+uftag.mc will contain mc connected data.
+uftag.struct will contain structure related data.
+uftag.page will contain page data
+uftag.tables contains also data from mc and struct (from older code). This needs cleaning up.
+ There are certainly dublettes, but I don't dare yet ...
+uftag.func will contain (public) functions.
+uftag.trace will contain tracing/loging functions.
+local funktions starts with __
+
+functions
+ uftag.func.get_num_from (tag): takes a tag (string) and returns the id number
+ uftag.func.output_num_from (tag): takes a tag (string) and prints (to tex) the id number
+ uftag.func.get_tag_from (num): takes a num and returns the tag
+ uftag.func.output_tag_from (num): takes a num and prints (to tex) the tag
+ uftag.func.store_mc_data (num,key,data): stores key=data in uftag.mc[num]
+ uftag.func.store_mc_label (label,num): stores label=num in uftag.mc.labels
+ uftag.func.store_mc_kid (mcnum,kid,page): stores the mc-kids of mcnum on page page
+ uftag.func.store_mc_in_page(mcnum,mcpagecnt,page): stores in the page table the number of mcnum on this page
+ uftag.func.store_struct_mcabs (structnum,mcnum): stores relations structnum<->mcnum (abs)
+ uftag.func.mc_insert_kids (mcnum): inserts the /K entries for mcnum by wandering throught the [kids] table
+ uftag.func.mark_page_elements(box,mcpagecnt,mccntprev,mcopen,name,mctypeprev) : the main function
+ uftag.func.mark_shipout (): a wrapper around the core function which inserts the last EMC
+ uftag.func.fill_parent_tree_line (page): outputs the entries of the parenttree for this page
+ uftag.func.output_parenttree(): outputs the content of the parenttree
+ uftag.func.markspaceon(), uftag.func.markspaceoff(): (de)activates the marking of positions for space chars
+ uftag.trace.show_mc_data (num): shows uftag.mc[num]
+ uftag.trace.show_all_mc_data (max): shows a maximum about mc's
+ uftag.trace.show_seq: shows a sequence (array)
+ uftag.trace.show_struct_data (num): shows data of structure num
+ uftag.trace.show_prop: shows a prop
+ uftag.trace.log
+ uftag.trace.showspaces : boolean
+--]]
+
+local mctypeattributeid = luatexbase.registernumber ("l__uftag_mc_type_attr")
+local mccntattributeid = luatexbase.registernumber ("l__uftag_mc_cnt_attr")
+local iwspaceattributeid = luatexbase.registernumber ("g__uftag_interwordspace_attr")
+local iwfontattributeid = luatexbase.registernumber ("g__uftag_interwordfont_attr")
+
+
+local catlatex = luatexbase.registernumber("catcodetable@latex")
+local tagunmarkedbool= token.create("g__uftag_tagunmarked_bool")
+local truebool = token.create("c_true_bool")
+
+local tableinsert = table.insert
+
+-- not all needed, copied from lua-visual-debug.
+local nodeid = node.id
+local nodecopy = node.copy
+local nodegetattribute = node.get_attribute
+local nodesetattribute = node.set_attribute
+local nodenew = node.new
+local nodetail = node.tail
+local nodeslide = node.slide
+local noderemove = node.remove
+local nodetraverseid = node.traverse_id
+local nodetraverse = node.traverse
+local nodeinsertafter = node.insert_after
+local nodeinsertbefore = node.insert_before
+local pdfpageref = pdf.pageref
+
+local HLIST = node.id("hlist")
+local VLIST = node.id("vlist")
+local RULE = node.id("rule")
+local DISC = node.id("disc")
+local GLUE = node.id("glue")
+local GLYPH = node.id("glyph")
+local KERN = node.id("kern")
+local PENALTY = node.id("penalty")
+local LOCAL_PAR = node.id("local_par")
+local MATH = node.id("math")
+
+local function __uftag_get_mathsubtype (mathnode)
+ if mathnode.subtype == 0 then
+ subtype = "beginmath"
+ else
+ subtype = "endmath"
+ end
+ return subtype
+end
+
+
+
+uftag = uftag or { }
+uftag.mc = uftag.mc or { } -- mc data
+uftag.struct = uftag.struct or { } -- struct data
+uftag.tables = uftag.tables or { } -- tables created with new prop and new seq.
+ -- wasn't a so great idea ...
+uftag.page = uftag.page or { } -- page data, currently only i->{0->mcnum,1->mcnum,...}
+uftag.trace = uftag.trace or { } -- show commands
+uftag.func = uftag.func or { } -- functions
+uftag.conf = uftag.conf or { } -- configuration variables
+
+local __uftag_log =
+ function (message,loglevel)
+ if (loglevel or 3) <= tex.count["l__uftag_loglevel_int"] then
+ texio.write_nl("tagpdf: ".. message)
+ end
+ end
+
+uftag.trace.log = __uftag_log
+
+
+local __uftag_get_mc_cnt_type_tag = function (n)
+ local mccnt = nodegetattribute(n,mccntattributeid) or -1
+ local mctype = nodegetattribute(n,mctypeattributeid) or -1
+ local tag = uftag.func.get_tag_from(mctype)
+ return mccnt,mctype,tag
+end
+
+
+local function __uftag_insert_emc_node (head,current)
+ local emcnode = nodenew("whatsit","pdf_literal")
+ emcnode.data = "EMC"
+ emcnode.mode=1
+ head = node.insert_before(head,current,emcnode)
+ return head
+end
+
+
+local function __uftag_insert_bmc_node (head,current,tag)
+ local bmcnode = nodenew("whatsit","pdf_literal")
+ bmcnode.data = "/"..tag.." BMC"
+ bmcnode.mode=1
+ head = node.insert_before(head,current,bmcnode)
+ return head
+end
+
+local function __uftag_insert_bdc_node (head,current,tag,dict)
+ local bdcnode = nodenew("whatsit","pdf_literal")
+ bdcnode.data = "/"..tag.."<<"..dict..">> BDC"
+ bdcnode.mode=1
+ head = node.insert_before(head,current,bdcnode)
+ return head
+end
+
+-- this is for debugging the space chars
+local function __uftag_show_spacemark (head,current,color,height)
+ local markcolor = color or "1 0 0"
+ local markheight = height or 10
+ local pdfstring = node.new("whatsit","pdf_literal")
+ pdfstring.data =
+ string.format("q "..markcolor.." RG "..markcolor.." rg 0.4 w 0 %g m 0 %g l S Q",-3,markheight)
+ head = node.insert_after(head,current,pdfstring)
+ return head
+end
+
+--[[ a function to mark up places where real space chars should be inserted
+ it only sets an attribute.
+--]]
+
+local function __uftag_mark_spaces (head)
+ local inside_math = false
+ for n in nodetraverse(head) do
+ local id = n.id
+ if id == GLYPH then
+ local glyph = n
+ if glyph.next and (glyph.next.id == GLUE)
+ and not inside_math and (glyph.next.width >0)
+ then
+ nodesetattribute(glyph.next,iwspaceattributeid,1)
+ nodesetattribute(glyph.next,iwfontattributeid,glyph.font)
+ -- for debugging
+ if uftag.trace.showspaces then
+ __uftag_show_spacemark (head,glyph)
+ end
+ elseif glyph.next and (glyph.next.id==KERN) and not inside_math then
+ local kern = glyph.next
+ if kern.next and (kern.next.id== GLUE) and (kern.next.width >0)
+ then
+ nodesetattribute(kern.next,iwspaceattributeid,1)
+ nodesetattribute(kern.next,iwfontattributeid,glyph.font)
+ end
+ end
+ elseif id == PENALTY then
+ local glyph = n
+ -- uftag.trace.log ("PENALTY ".. n.subtype.."VALUE"..n.penalty,3)
+ if glyph.next and (glyph.next.id == GLUE)
+ and not inside_math and (glyph.next.width >0) and n.subtype==0
+ then
+ nodesetattribute(glyph.next,iwspaceattributeid,1)
+ -- nodesetattribute(glyph.next,iwfontattributeid,glyph.font)
+ -- for debugging
+ if uftag.trace.showspaces then
+ __uftag_show_spacemark (head,glyph)
+ end
+ end
+ elseif id == MATH then
+ inside_math = (n.subtype == 0)
+ end
+ end
+ return head
+end
+
+local function __uftag_activate_mark_space ()
+ if not luatexbase.in_callback ("pre_linebreak_filter","markspaces") then
+ luatexbase.add_to_callback("pre_linebreak_filter",__uftag_mark_spaces,"markspaces")
+ luatexbase.add_to_callback("hpack_filter",__uftag_mark_spaces,"markspaces")
+ end
+end
+
+uftag.func.markspaceon=__uftag_activate_mark_space
+
+local function __uftag_deactivate_mark_space ()
+ if luatexbase.in_callback ("pre_linebreak_filter","markspaces") then
+ luatexbase.remove_from_callback("pre_linebreak_filter","markspaces")
+ luatexbase.remove_from_callback("hpack_filter","markspaces")
+ end
+end
+--
+uftag.func.markspaceoff=__uftag_deactivate_mark_space
+
+local default_space_char = node.new(GLYPH)
+local default_fontid = font.id("TU/lmr/m/n/10")
+default_space_char.char = 32
+default_space_char.font = default_fontid
+
+local function __uftag_insert_space_char (head,n,fontid)
+ if luaotfload.aux.slot_of_name(fontid,"space") then
+ local space
+ -- head, space = node.insert_before(head, n, ) -- Set the right font
+ -- n.width = n.width - space.width
+ -- space.attr = n.attr
+ end
+end
+
+--[[
+ Now follows the core function
+ It wades through the shipout box and checks the attributes
+ ARGUMENTS
+ box: is a box,
+ mcpagecnt: num, the current page cnt of mc (should start at -1 in shipout box), needed for recursion
+ mccntprev: num, the attribute cnt of the previous node/whatever - if different we have a chunk border
+ mcopen: num, records if some bdc/emc is open
+ These arguments are only needed for log messages, if not present are replaces by fix strings:
+ name: string to describe the box
+ mctypeprev: num, the type attribute of the previous node/whatever
+
+ there are lots of logging messages currently. Should be cleaned up in due course.
+ One should also find ways to make the function shorter.
+--]]
+
+function uftag.func.mark_page_elements (box,mcpagecnt,mccntprev,mcopen,name,mctypeprev)
+ local name = name or ("SOMEBOX")
+ local mctypeprev = mctypeprev or -1
+ local abspage = tex.count["g__uftag_abspage_int"] --["c@abspage"]
+ uftag.trace.log ("PAGE " .. abspage,3)
+ uftag.trace.log ("FUNC ARGS: pagecnt".. mcpagecnt.." prev "..mccntprev .. " type prev "..mctypeprev,4)
+ uftag.trace.log ("TRAVERSING BOX ".. tostring(name).." TYPE ".. node.type(node.getid(box)),3)
+ local head = box.head -- AtBeginShipoutBox is a vlist?
+ if head then
+ mccnthead, mctypehead,taghead = __uftag_get_mc_cnt_type_tag (head)
+ uftag.trace.log ("HEAD " .. node.type(node.getid(head)).. " MC"..tostring(mccnthead).." => TAG "..tostring(mctypehead).." => "..tostring(taghead),3)
+ else
+ uftag.trace.log ("HEAD is ".. tostring(head),3)
+ end
+ for n in node.traverse(head) do
+ local mccnt, mctype, tag = __uftag_get_mc_cnt_type_tag (n)
+ local spaceattr = nodegetattribute(n,iwspaceattributeid) or -1
+ uftag.trace.log ("NODE ".. node.type(node.getid(n)).." MC"..tostring(mccnt).." => TAG "..tostring(mctype).." => " .. tostring(tag),3)
+ if n.id == HLIST
+ then -- enter the hlist
+ mcopen,mcpagecnt,mccntprev,mctypeprev=
+ uftag.func.mark_page_elements (n,mcpagecnt,mccntprev,mcopen,"INTERNAL HLIST",mctypeprev)
+ elseif n.id == VLIST then -- enter the vlist
+ mcopen,mcpagecnt,mccntprev,mctypeprev=
+ uftag.func.mark_page_elements (n,mcpagecnt,mccntprev,mcopen,"INTERNAL VLIST",mctypeprev)
+ elseif n.id == GLUE then -- at glue real space chars are inserted, for the rest it is ignored
+ -- for debugging
+ if uftag.trace.showspaces and spaceattr==1 then
+ __uftag_show_spacemark (head,n,"0 1 0")
+ end
+ if spaceattr==1 then
+ local space
+ local space_char = node.copy(default_space_char)
+ local curfont = nodegetattribute(n,iwfontattributeid)
+ uftag.trace.log ("FONT ".. tostring(curfont),3)
+ if curfont and luaotfload.aux.slot_of_name(curfont,"space") then
+ space_char.font=curfont
+ end
+ head, space = node.insert_before(head, n, space_char) --
+ n.width = n.width - space.width
+ space.attr = n.attr
+ end
+ elseif n.id == LOCAL_PAR then -- local_par is ignored
+ elseif n.id == PENALTY then -- penalty is ignored
+ elseif n.id == KERN then -- kern is ignored
+ uftag.trace.log ("SUBTYPE KERN ".. n.subtype,3)
+ else
+ -- math is currently only logged.
+ -- we could mark the whole as math
+ -- for inner processing the mlist_to_hlist callback is probably needed.
+ if n.id == MATH then
+ uftag.trace.log("NODE "..node.type(node.getid(n)).." "..__uftag_get_mathsubtype(n),3)
+ end
+ -- endmath
+ uftag.trace.log("CURRENT "..mccnt.." PREV "..mccntprev,3)
+ if mccnt~=mccntprev then -- a new mc chunk
+ uftag.trace.log ("NODE ".. node.type(node.getid(n)).." MC"..tostring(mccnt).." <=> PREVIOUS "..tostring(mccntprev),3)
+ if mcopen~=0 then -- there is a chunk open, close it (hope there is only one ...
+ box.list=__uftag_insert_emc_node (box.list,n)
+ mcopen = mcopen - 1
+ uftag.trace.log ("INSERT EMC " .. mcpagecnt .. " MCOPEN = " .. mcopen,2)
+ if mcopen ~=0 then
+ uftag.trace.log ("!WARNING! open mc" .. " MCOPEN = " .. mcopen,1)
+ end
+ end
+ if uftag.mc[mccnt] then
+ if uftag.mc[mccnt]["artifact"] then
+ uftag.trace.log("THIS IS AN ARTIFACT of type "..tostring(uftag.mc[mccnt]["artifact"]),3)
+ if uftag.mc[mccnt]["artifact"] == "" then
+ box.list = __uftag_insert_bmc_node (box.list,n,"Artifact")
+ else
+ box.list = __uftag_insert_bdc_node (box.list,n,"Artifact", "/Type /"..uftag.mc[mccnt]["artifact"])
+ end
+ else
+ uftag.trace.log("THIS IS A TAG "..tostring(tag),3)
+ mcpagecnt = mcpagecnt +1
+ uftag.trace.log ("INSERT BDC "..mcpagecnt,2)
+ local dict= "/MCID "..mcpagecnt
+ if uftag.mc[mccnt]["raw"] then
+ uftag.trace.log("RAW CONTENT"..tostring(uftag.mc[mccnt]["raw"]),3)
+ dict= dict .. " " .. uftag.mc[mccnt]["raw"]
+ end
+ if uftag.mc[mccnt]["alt"] then
+ uftag.trace.log("RAW CONTENT"..tostring(uftag.mc[mccnt]["alt"]),3)
+ dict= dict .. " " .. uftag.mc[mccnt]["alt"]
+ end
+ if uftag.mc[mccnt]["actualtext"] then
+ uftag.trace.log("RAW CONTENT"..tostring(uftag.mc[mccnt]["actualtext"]),3)
+ dict= dict .. " " .. uftag.mc[mccnt]["actualtext"]
+ end
+ box.list = __uftag_insert_bdc_node (box.list,n,tag, dict)
+ uftag.func.store_mc_kid (mccnt,mcpagecnt,abspage)
+ uftag.func.store_mc_in_page(mccnt,mcpagecnt,abspage)
+ uftag.trace.show_mc_data (mccnt)
+ end
+ mcopen = mcopen + 1
+ else
+ uftag.trace.log("THIS HAS NOT BEEN TAGGED",1)
+ -- perhaps code that tag a artifact can be added ...
+ if tagunmarkedbool.mode == truebool.mode then
+ box.list = __uftag_insert_bmc_node (box.list,n,"Artifact")
+ end
+ mcopen = mcopen + 1
+ end
+ mccntprev = mccnt
+ end
+ end -- end if
+ end -- end for
+ if head then
+ mccnthead, mctypehead,taghead = __uftag_get_mc_cnt_type_tag (head)
+ uftag.trace.log ("ENDHEAD " .. node.type(node.getid(head)).. " MC"..tostring(mccnthead).." => TAG "..tostring(mctypehead).." => "..tostring(taghead),3)
+ else
+ uftag.trace.log ("ENDHEAD is ".. tostring(head),3)
+ end
+ uftag.trace.log ("QUITTING TRAVERSING BOX ".. tostring(name).." TYPE ".. node.type(node.getid(box)),3)
+ return mcopen,mcpagecnt,mccntprev,mctypeprev
+end
+
+function uftag.func.mark_shipout ()
+ mcopen = uftag.func.mark_page_elements (tex.box["AtBeginShipoutBox"],-1,-100,0,"Shipout",-1)
+ if mcopen~=0 then -- there is a chunk open, close it (hope there is only one ...
+ local emcnode = nodenew("whatsit","pdf_literal")
+ local box = tex.box["AtBeginShipoutBox"].list
+ emcnode.data = "EMC"
+ emcnode.mode=1
+ if box then
+ box = node.insert_after (box,node.tail(box),emcnode)
+ mcopen = mcopen - 1
+ uftag.trace.log ("INSERT LAST EMC, MCOPEN = " .. mcopen,2)
+ else
+ uftag.trace.log ("UPS ",1)
+ end
+ if mcopen ~=0 then
+ uftag.trace.log ("!WARNING! open mc" .. " MCOPEN = " .. mcopen,1)
+ end
+ end
+end
+
+function uftag.trace.show_seq (seq)
+ if (type(seq) == "table") then
+ for i,v in ipairs(seq) do
+ __uftag_log ("[" .. i .. "] => " .. tostring(v),1)
+ end
+ else
+ __uftag_log ("sequence " .. tostring(seq) .. " not found",1)
+ end
+end
+
+local __uftag_pairs_prop =
+ function (prop)
+ local a = {}
+ for n in pairs(prop) do tableinsert(a, n) end
+ table.sort(a)
+ local i = 0 -- iterator variable
+ local iter = function () -- iterator function
+ i = i + 1
+ if a[i] == nil then return nil
+ else return a[i], prop[a[i]]
+ end
+ end
+ return iter
+ end
+
+
+function uftag.trace.show_prop (prop)
+ if (type(prop) == "table") then
+ for i,v in __uftag_pairs_prop (prop) do
+ __uftag_log ("[" .. i .. "] => " .. tostring(v),1)
+ end
+ else
+ __uftag_log ("prop " .. tostring(prop) .. " not found or not a table",1)
+ end
+ end
+
+
+local __uftag_get_num_from =
+ function (tag)
+ if uftag.tables["g__uftag_role_tags_prop"][tag] then
+ a= uftag.tables["g__uftag_role_tags_prop"][tag]
+ else
+ a= -1
+ end
+ return a
+ end
+
+uftag.func.get_num_from = __uftag_get_num_from
+
+function uftag.func.output_num_from (tag)
+ local num = __uftag_get_num_from (tag)
+ tex.sprint(catlatex,num)
+ if num == -1 then
+ __uftag_log ("Unknown tag "..tag.." used")
+ end
+end
+
+local __uftag_get_tag_from =
+ function (num)
+ if uftag.tables["g__uftag_role_tags_seq"][num] then
+ a = uftag.tables["g__uftag_role_tags_seq"][num]
+ else
+ a= "UNKNOWN"
+ end
+ return a
+end
+
+uftag.func.get_tag_from = __uftag_get_tag_from
+
+function uftag.func.output_tag_from (num)
+ tex.sprint(catlatex,__uftag_get_tag_from (num))
+end
+
+function uftag.func.store_mc_data (num,key,data)
+ uftag.mc[num] = uftag.mc[num] or { }
+ uftag.mc[num][key] = data
+ __uftag_log ("storing mc"..num..": "..tostring(key).."=>"..tostring(data))
+end
+
+function uftag.trace.show_mc_data (num)
+ if uftag and uftag.mc and uftag.mc[num] then
+ for k,v in pairs(uftag.mc[num]) do
+ __uftag_log ("mc"..num..": "..tostring(k).."=>"..tostring(v),3)
+ end
+ if uftag.mc[num]["kids"] then
+ __uftag_log ("mc" .. num .. " has " .. #uftag.mc[num]["kids"] .. " kids",3)
+ for k,v in ipairs(uftag.mc[num]["kids"]) do
+ __uftag_log ("mc ".. num .. " kid "..k.." =>" .. v.kid.." on page " ..v.page,3)
+ end
+ end
+ else
+ __uftag_log ("mc"..num.." not found",3)
+ end
+end
+
+function uftag.trace.show_all_mc_data (max)
+ for i = 1, max do
+ uftag.trace.show_mc_data (i)
+ end
+end
+
+
+function uftag.func.store_mc_label (label,num)
+ uftag.mc["labels"] = uftag.mc["labels"] or { }
+ uftag.mc.labels[label] = num
+end
+
+function uftag.func.store_mc_kid (mcnum,kid,page)
+ uftag.trace.log("MC"..mcnum.." STORING KID" .. kid.." on page " .. page,3)
+ uftag.mc[mcnum]["kids"] = uftag.mc[mcnum]["kids"] or { }
+ local kidtable = {kid=kid,page=page}
+ tableinsert(uftag.mc[mcnum]["kids"], kidtable )
+end
+
+
+function uftag.func.mc_num_of_kids (mcnum)
+ local num = 0
+ if uftag.mc[mcnum] and uftag.mc[mcnum]["kids"] then
+ num = #uftag.mc[mcnum]["kids"]
+ end
+ uftag.trace.log ("MC" .. mcnum .. "has " .. num .. "KIDS",4)
+ return num
+end
+
+function uftag.func.mc_insert_kids (mcnum,single)
+ if uftag.mc[mcnum] then
+ uftag.trace.log("MC-KIDS test " .. mcnum,4)
+ if uftag.mc[mcnum]["kids"] then
+ if #uftag.mc[mcnum]["kids"] > 1 and single==1 then
+ tex.sprint("[")
+ end
+ for i,kidstable in ipairs( uftag.mc[mcnum]["kids"] ) do
+ local kidnum = kidstable["kid"]
+ local kidpage = kidstable["page"]
+ local kidpageobjnum = pdfpageref(kidpage)
+ uftag.trace.log("MC" .. mcnum .. " insert KID " ..i.. " with num " .. kidnum .. " on page " .. kidpage.."/"..kidpageobjnum,3)
+ tex.sprint(catlatex,"<</Type /MCR /Pg "..kidpageobjnum .. " 0 R /MCID "..kidnum.. ">> " )
+ end
+ if #uftag.mc[mcnum]["kids"] > 1 and single==1 then
+ tex.sprint("]")
+ end
+ else
+ uftag.trace.log("WARN! MC"..mcnum.." has no kids",0)
+ end
+ else
+ uftag.trace.log("WARN! MC"..mcnum.." doesn't exist",0)
+ end
+end
+
+
+function uftag.func.store_struct_mcabs (structnum,mcnum)
+ uftag.struct[structnum]=uftag.struct[structnum] or { }
+ uftag.struct[structnum]["mc"]=uftag.struct[structnum]["mc"] or { }
+ -- a structure can contain more than on mc chunk, the content should be ordered
+ tableinsert(uftag.struct[structnum]["mc"],mcnum)
+ uftag.trace.log("MCNUM "..mcnum.." insert in struct "..structnum,3)
+ -- but every mc can only be in one structure
+ uftag.mc[mcnum]= uftag.mc[mcnum] or { }
+ uftag.mc[mcnum]["parent"] = structnum
+end
+
+function uftag.trace.show_struct_data (num)
+ if uftag and uftag.struct and uftag.struct[num] then
+ for k,v in ipairs(uftag.struct[num]) do
+ __uftag_log ("struct "..num..": "..tostring(k).."=>"..tostring(v))
+ end
+ else
+ __uftag_log ("struct "..num.." not found ")
+ end
+end
+
+-- pay attention: lua counts arrays from 1, tex pages from one
+-- mcid and arrays in pdf count from 0.
+function uftag.func.store_mc_in_page (mcnum,mcpagecnt,page)
+ uftag.page[page] = uftag.page[page] or {}
+ uftag.page[page][mcpagecnt] = mcnum
+ uftag.trace.log("PAGE " .. page .. ": inserting MCID " .. mcpagecnt .. " => " .. mcnum,3)
+end
+
+function uftag.func.fill_parent_tree_line (page)
+ -- we need to get page-> i=kid -> mcnum -> structnum
+ -- pay attention: the kid numbers and the page number in the parent tree start with 0!
+ local numsentry =""
+ local pdfpage = page-1
+ if uftag.page[page] and uftag.page[page][0] then
+ mcchunks=#uftag.page[page]
+ uftag.trace.log("PAGETREE PAGE "..page.." has "..mcchunks.."+1 Elements ",3)
+ for i=0,mcchunks do
+ uftag.trace.log("PAGETREE CHUNKS "..uftag.page[page][i],3)
+ end
+ if mcchunks == 0 then
+ -- only one chunk so no need for an array
+ local mcnum = uftag.page[page][0]
+ local structnum = uftag.mc[mcnum]["parent"]
+ local propname = "g__uftag_struct_"..structnum.."_prop"
+ local objnum = uftag.tables[propname]["objnum"] or "XXXX"
+ texio.write_nl("=====>"..tostring(objnum))
+ numsentry = pdfpage .. " ".. objnum .. " 0 R"
+ uftag.trace.log("PAGETREE PAGE" .. page.. " NUM ENTRY = ".. numsentry,3)
+ else
+ numsentry = pdfpage .. " ["
+ for i=0,mcchunks do
+ local mcnum = uftag.page[page][i]
+ local structnum = uftag.mc[mcnum]["parent"] or 0
+ local propname = "g__uftag_struct_"..structnum.."_prop"
+ local objnum = uftag.tables[propname]["objnum"] or "XXXX"
+ numsentry = numsentry .. " ".. objnum .. " 0 R"
+ end
+ numsentry = numsentry .. "] "
+ uftag.trace.log("PAGETREE PAGE" .. page.. " NUM ENTRY = ".. numsentry,3)
+ end
+ else
+ uftag.trace.log ("PAGETREE: NO DATA FOR PAGE "..page,3)
+ end
+ return numsentry
+end
+
+function uftag.func.output_parenttree (abspage)
+ for i=1,abspage do
+ line = uftag.func.fill_parent_tree_line (i) .. "^^J"
+ tex.sprint(catlatex,line)
+ end
+end