Re: AW: Fw: Fixing lua filter to number paragraphs

["'Mark Johnno' via pandoc-discuss" <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>]

Adding: addTexPreamble("\\usepackage{xcolor}")

and switching \\color (on the following line) to 'gray' from 'lightgray' fixed the issue; Pandoc issued error "! LaTeX Error: Undefined color 'Lightgray'".

When I tried adding addTexPreamble("\\usepackage{color}") instead of xcolor, pandoc issued "Undefined color" for both gray and lightgray (black worked fine.)

Anyway, the filter works fine with 'xcolor' and 'gray'. Thanks a lot for your help, and for replying so quickly.


------- Original Message -------
On Saturday, September 24th, 2022 at 8:04 AM, <denis.maier-NSENcxR/0n0@public.gmane.org> wrote:


> Or maybe the xcolor package.
> ________________________________________
> Von: pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org im Auftrag von Bastien DUMONT bastien.dumont-VwIFZPTo/vqsTnJN9+BGXg@public.gmane.org
>
> Gesendet: Samstag, 24. September 2022 07:39:08
> An: 'Mark Johnno' via pandoc-discuss
> Betreff: Re: Fw: Fixing lua filter to number paragraphs
>
> The error means that the command \color is not defined, i.e. the package that defines it is not loaded. It should be fixed by adding this after addTexPreamble("\\reversemarginpar"):
>
> addTexPreamble("\\usepackage{\\color}")
>
> Le Friday 23 September 2022 à 11:09:42PM, 'Mark Johnno' via pandoc-discuss a écrit :
>
> > Hi, I have been using a lua filter for a few months with no issue, however, for the last few days, I've not been able to produce a PDF. I can't find hints online. I am hoping someone can help me.
> >
> > That is the error message I get:
> >
> > ! Undefined control sequence.
> > <argument> ... \hspace {\z@ }\ignorespaces \color
> >
> > {lightgray}\tiny {[1]}\end...
> > l.72 \paragraphnumber{[1]}
> >
> > I had some error messages in the past, usually due to missing squared brackets which I resolved by using --trace to check where parsing was slowing down (that is where the brackets were missing), but this time --trace does not provide any hints.
> >
> > I can convert the document from .md to .pdf (without the filter); that is the command I use:
> >
> > $ pandoc file.md --pdf-engine=xelatex -o file.pdf
> >
> > ...but when I add count-para.lua filter:
> >
> > $ pandoc file.md --pdf-engine=xelatex --lua-filter=count-para.lua -o file.pdf
> >
> > I get the error message mentioned above.
> >
> > I also tried with another document. I get the same error message.
> >
> > I tried contacting the author of the filter, in vain.
> >
> > Do you have a hint about how I could troubleshoot or fix this issue?
> >
> > Does the filter need to be updated?
> >
> > $ pandoc -v
> > pandoc 2.5
> > Compiled with pandoc-types 1.17.5.4, texmath 0.11.2.2, skylighting 0.7.7
> >
> > I use Trisquel GNU/Linux 10.0.1.
> >
> > This is the filter:
> >
> > --[[
> > Make all 'regular' paragraphs into a div and assign a numeric ID
> > Format this number in the margin
> > Copyright © 2021 Michael Cysouw
> > Permission to use, copy, modify, and/or distribute this software for any
> > purpose with or without fee is hereby granted, provided that the above
> > copyright notice and this permission notice appear in all copies.
> > THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
> > WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
> > MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
> > ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
> > WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
> > ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
> > OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
> > ]]
> >
> > local count = 0
> > local chapter = 0
> > local indexUserID = {}
> >
> > ------------------------------
> > -- Options with default values
> > ------------------------------
> >
> > local resetAtChapter = false
> > local enclosing = "[]"
> > local chapterSep = "."
> > local refName = "paragraph "
> > local addPageNr = true
> >
> > function getUserSettings (meta)
> >
> > if meta.resetAtChapter ~= nil then
> > resetAtChapter = meta.resetAtChapter
> > end
> >
> > if meta.enclosing ~= nil then
> > enclosing = pandoc.utils.stringify(meta.enclosing)
> > end
> >
> > if meta.chapterSep ~= nil then
> > chapterSep = pandoc.utils.stringify(meta.chapterSep)
> > end
> >
> > if meta.refName ~= nil then
> > refName = pandoc.utils.stringify(meta.refName)
> > if FORMAT:match "latex" then
> > if refName == "#" then refName = "\\#" end
> > end
> > end
> >
> > if meta.addPageNr ~= nil then
> > addPageNr = meta.addPageNr
> > end
> >
> > end
> >
> > ------------------------
> > -- Add global formatting
> > ------------------------
> >
> > function addFormatting (meta)
> >
> > local tmp = pandoc.MetaList{meta['header-includes']}
> > if meta['header-includes'] ~= nil then
> > tmp = meta['header-includes']
> > end
> >
> > if FORMAT:match "html" then
> > local css = [[
> > <!-- CSS added by lua-filter 'count-para' -->
> > <style>
> > .paragraph-number {
> > float: left;
> > margin-left: -5em;
> > width: 4.5em;
> > text-align: right;
> > color: grey;
> > font-size: x-small;
> > padding-top: 5px;
> > }
> > </style>
> > ]]
> > tmp[#tmp+1] = pandoc.MetaBlocks(pandoc.RawBlock("html", css))
> > end
> >
> > function addTexPreamble (tex)
> > tmp[#tmp+1] = pandoc.MetaBlocks(pandoc.RawBlock("tex", tex))
> > end
> >
> > if FORMAT:match "latex" then
> > addTexPreamble("\\usepackage{marginnote}")
> > addTexPreamble("\\reversemarginpar")
> > addTexPreamble("\\newcommand{\\paragraphnumber}[1]{\\marginnote{\\color{lightgray}\\tiny{#1}}[0pt]}")
> > end
> >
> > meta['header-includes'] = tmp
> > return(meta)
> > end
> >
> > -------------------------
> > -- count Para and add Div
> > -------------------------
> >
> > function countPara (doc)
> >
> > for i=1,#doc.blocks do
> >
> > -- optionally reset counter
> > if doc.blocks[i].tag == "Header"
> > and doc.blocks[i].level == 1
> > and doc.blocks[i].classes[1] ~= "unnumbered"
> > and resetAtChapter
> > then
> > chapter = chapter + 1
> > count = 0
> > end
> >
> > -- get Para, but not if there is an Image inside
> > if doc.blocks[i].tag == "Para"
> > and doc.blocks[i].content[1].tag ~= "Image"
> > then
> >
> > -- count paragraphs
> > count = count + 1
> > local ID = count
> > if resetAtChapter then
> > ID = chapter..chapterSep..count
> > end
> >
> > -- format number to insert
> > local number = ID
> > if enclosing:len() == 1 then
> > number = enclosing..ID..enclosing
> > else
> > number = enclosing:sub(1,1)..ID..enclosing:sub(2,2)
> > end
> >
> > -- check for user-inserted ids at the start of the paragraph
> > local firstElem = pandoc.utils.stringify(doc.blocks[i].content[1])
> > local userID = firstElem:match("{#(.*)}")
> > if userID ~= nil then
> > -- add to index
> > indexUserID[userID] = ID
> > -- remove reference from text
> > table.remove(doc.blocks[i].content, 1)
> > -- remove possible space
> > if doc.blocks[i].content[1].tag == "Space" then
> > table.remove(doc.blocks[i].content, 1)
> > end
> > end
> >
> > -- insert number
> > if FORMAT:match "latex" then
> > -- use marginnote for formatting number in margin
> > local texCount = "\\paragraphnumber{"..number.."}"
> > if userID ~= nil then
> > -- add target for link to the number
> > texCount = "\\hypertarget{"..userID.."}{\n"..texCount.."\\label{"..userID.."}}"
> > end
> > table.insert(doc.blocks[i].content, 1, pandoc.RawInline("tex", texCount))
> > else
> > table.insert(doc.blocks[i].content, 1, pandoc.Space())
> > table.insert(doc.blocks[i].content, 1, pandoc.Span(number, pandoc.Attr(ID, {"paragraph-number"})))
> > end
> >
> > end
> > end
> > return doc
> > end
> >
> > ------------------------------
> > -- set in-text cross-references
> > ------------------------------
> >
> > function setCrossRefs (cite)
> >
> > local userID = cite.citations[1].id
> > local paraID = indexUserID[userID]
> >
> > -- ignore other "cite" elements
> > if paraID ~= nil then
> >
> > -- make in-document cross-references
> > if FORMAT:match "latex" then
> >
> > local texInsert = refName.."\\hyperlink{"..userID.."}{"..paraID.."}"
> > if addPageNr then
> > texInsert = texInsert.." on page~\\pageref{"..userID.."}"
> > end
> > return pandoc.RawInline("tex", texInsert)
> >
> > else
> > return pandoc.Link(refName..paraID, "#"..paraID)
> > end
> >
> > end
> > end
> >
> > --------------------
> > -- basic Pandoc loop
> > --------------------
> >
> > return {
> > { Meta = addFormatting },
> > { Meta = getUserSettings },
> > { Pandoc = countPara },
> > { Cite = setCrossRefs }
> > }
> >
> > --
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