diff options
Diffstat (limited to 'tex/context/base/lpdf-tag.lua')
| -rw-r--r-- | tex/context/base/lpdf-tag.lua | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/tex/context/base/lpdf-tag.lua b/tex/context/base/lpdf-tag.lua index 79ccfe075..828bfed25 100644 --- a/tex/context/base/lpdf-tag.lua +++ b/tex/context/base/lpdf-tag.lua @@ -87,6 +87,7 @@ local specifications = structurestags.specifications local usedlabels = structurestags.labels local properties = structurestags.properties local lasttaginchain = structurestags.lastinchain +local usewithcare = structurestags.usewithcare local usedmapping = { } @@ -273,16 +274,19 @@ end local f_BDC = formatters["/%s <</MCID %s>> BDC"] -local function makecontent(parent,id) +local function makecontent(parent,id,specification) local tag = parent.tag local kids = parent.kids local last = index if id == "image" then + local list = specification.taglist + local data = usewithcare.images[list[#list]] + local label = data and data.label local d = pdfdictionary { Type = pdf_mcr, Pg = pageref, MCID = last, - Alt = "image", + Alt = pdfunicode(label ~= "" and label or "image"), } kids[#kids+1] = d elseif pagenum == parent.pnum then @@ -303,6 +307,10 @@ local function makecontent(parent,id) return f_BDC(tag,last) end +local function makeignore(specification) + return "/Artifact BMC" +end + -- no need to adapt head, as we always operate on lists function nodeinjections.addtags(head) @@ -388,14 +396,17 @@ function nodeinjections.addtags(head) end end - local prev = common > 0 and elements[taglist[common]] or root + local prev = common > 0 and elements[taglist[common]] or root + local ignore = false + local literal = nil for j=common+1,noftags do local tag = taglist[j] local prv = elements[tag] or makeelement(tag,prev) if prv == false then -- ignore this one - prev = false + prev = false + ignore = true break elseif prv == true then -- skip this one @@ -405,9 +416,12 @@ function nodeinjections.addtags(head) end if prev then - -- use insert instead: - local literal = pdfliteral(makecontent(prev,id)) - local prev = getprev(start) + literal = pdfliteral(makecontent(prev,id,specification)) + elseif ignore then + literal = pdfliteral(makeignore(specification)) + end + if literal then + local prev = getprev(start) if prev then setfield(prev,"next",literal) setfield(literal,"prev",prev) |