syntax-definition for Pandoc's Markdown

[BPJ <melroch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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This reminds me I did some hacking on an (old) Markdown syntax definition
found on GitHub to at least give some support to Pandoc extensions, e.g.
attributes are highlighted with the item they belong to, spans are
highlighted as dsOthers. It could certainly be made more sophisticated but
I haven't found out how you specify that an item must follow another item.

Should I add it to the GitHub wiki?

Den sön 14 maj 2023 18:44John MacFarlane <fiddlosopher-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:

> Does your xml file define a context called Parameters?  This looks like a
> problem with your syntax definition
>
> On May 14, 2023, at 4:40 AM, Karl Weber <karl.weber99-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> Hi,
>
> yesterday I upgraded from release 2.11.3.2 to 3.1.2 and ran into some
> incompatibilities. I could fix those related to lua scripts, but I am
> stuck
> with my syntax definition.  (Both releases are the binary distributions
> from
> the pandoc website.)
>
> I have my own KDE-style XML syntax definition file named asshell.xml. In
> my
> global.yaml file it is specifies as
>
> syntax-definition: ../../../asshell.xml
>
> This relative path is correct. OS is opensuse. I use this syntax
> definition as
>
> ~~~~~~{.asshell}
> blabla
> ~~~~~~
>
> The file asshell.xml starts with
>
>  <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE language SYSTEM "language.dtd">
> <language name="asshell" version="1" kateversion="2.3" section="Sources"
> extensions="*.asshell" priority="5" author="KW" license="GPL">
>
> This worked perfectly with releases up to and including 2.11.3.2, but with
> 3.1.2 I get the error message
>
> [WARNING] Could not highlight code block:
>   Unknown syntax or context: ("asshell","Parameters")
>
> Could you please give me some help?
>
> Thanks in advance!
>
> Kind regards
> Karl
>
>

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<?xml version="1.0" encoding="UTF-8"?>
<!--
	Kate syntax highlight filter for Markdown/MultiMarkdown documents.

	Copyright 2008 Darrin Yeager. http://www.dyeager.org/
	Dual-Licensed under both GPL and BSD licenses.

	Extended 2009 Claes Holmerson. http://github.com/claes/kate-markdown/

Extended 2019-2023 by Benct Philip Jonsson bpjonsson@gmail.com to provide some support for Pandoc's http://pandoc.org flavor of Markdown.
-->


<!-- the [^\s]{1} is in the regex to avoid interfering with bullet list which
	  starts "* item". Thus emphasis/strong MUST be formed like *words here*
	  with the asterisks next to the beginning of the first word.

	  Match space or newline, followed by "*", followed by one non-space,
	  followed by anything non-asterisk, followed by "*", followed by
	  space, end-of-sentence punctuation, or the end of the line.
-->

<!DOCTYPE language SYSTEM "language.dtd"
			 [
             <!ENTITY afteremphregex "(?=\s|\.|,|;|:|\-|\?|$)">
             <!ENTITY insideemphregex "([^_]+|[^\s_]_[^\s_])+">
             <!ENTITY bracketregex "\[([^\[\]\^]+|\[([^\[\]\^]+|\[([^\[\]\^]+|\[([^\[\]\^]+|\[([^\[\]\^]+)*\])*\])*\])*\])*\]">
             <!ENTITY attrregex '\{([^\{\}\"\&#x27;]+|\"([^\"\\]+|\\.)*\"|\&#x27;([^\&#x27;\\]+|\\.)*\&#x27;)*\}'> <!-- pandoc style -->
             <!ENTITY strongemphasisregex "(_{3}((?!_{3})[\s\S])+_{3}|\*{3}((?!\*{3})[\s\S])+\*{3})">
             <!ENTITY strongregex "(_{2}((?!_{2})[\s\S])+_{2}|\*{2}((?!\*{2})[\s\S])+\*{2})">
             <!ENTITY emphasisregex "(\s|^)(_{1}[^\s_]{1}&insideemphregex;_{1}|\*{1}[^\*]+\*{1})&afteremphregex;">
			 <!ENTITY reflinkregex '&bracketregex;\s*\[[^\[\]]*\]\s*(\s+\"[^\"]*\"){0,1}'>
			 <!ENTITY reflinktargetregex '&bracketregex;\:\s+[^\s]+(\s+\"[^\"]*\"){0,1}'>
			 <!ENTITY fnoteregex "\[\^[^\[\]]+\]">
			 <!ENTITY fnotetargetregex "^\s*\[\^[^\[\]]+\]\:">
             <!ENTITY inlinelinkregex '&bracketregex;\s*\([^\(\)]*\)&attrregex;?'> 
             <!ENTITY inlineimageregex '\!&bracketregex;\([^\(\)]*\)&attrregex;?'>
			 <!ENTITY refimageregex '\!&bracketregex;\[[^\[]*\]'>
			 <!ENTITY autolinkregex '&lt;(https?|ftp):[^\"&gt;\s]+&gt;'>
			 <!ENTITY mailtolinkregex '&lt;(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)&gt;'>
			 <!ENTITY rulerregex '^\s*([\*\-_]\s?){3,}\s*$'>
			 <!-- two spaces at end of line generates linebreak -->
			 <!ENTITY linebreakregex "(  $|\\$)">
        <!-- pandoc additions -->
             <!ENTITY blockattrregex "\s*(&attrregex;|[A-Za-z]\w*)">
             <!ENTITY markregex "[=]{2}((?![=]{2}).)+[=]{2}">
             <!ENTITY strikeoutregex "[~]{2}((?![~]{2}).)+[~]{2}"> <!-- pandoc style -->
             <!ENTITY subscriptregex "[~]{1}([^\~\s\\]+|\\.)+[~]{1}"> <!-- pandoc style -->
             <!ENTITY superscriptregex "[\^]{1}([^\^\s\\]+|\\.)+[\^]{1}"> <!-- pandoc style -->
             <!ENTITY spanregex '&bracketregex;\s*&attrregex;'> <!-- pandoc style -->
             <!ENTITY divregex "[:]{3,}&blockattrregex;?"> <!-- pandoc style -->
             <!ENTITY numregex "([\d]+|[ivxlcdmIVXLCDM]+|[a-zA-Z])"> <!-- pandoc style -->
             <!ENTITY ordlistregex "(\(?&numregex;\)|&numregex;\.)"> <!-- pandoc style -->
]>

<language name="PandocMarkdown" version="1.2" section="Markup"
		extensions="*.text;*.md;*.mmd;*.mkd;*.markdown" priority="15"
		author="Darrin Yeager, Claes Holmerson"
		license="GPL,BSD" >

	<highlighting>

		<contexts>
			<context attribute="Normal Text" lineEndContext="#stay" name="Normal Text" >
				<DetectChar context="blockquote" char="&gt;" column="0"/>
				<RegExpr attribute="heading" String="^[#]+\s.*[#]?$" />
				<RegExpr attribute="heading" String="^==+$" />
				<RegExpr attribute="heading" String="^--+$" />
				<RegExpr attribute="strongemphasis" String="&strongemphasisregex;" />
				<RegExpr attribute="ruler" String="&rulerregex;" />
				<RegExpr attribute="strong" String="&strongregex;" />
				<RegExpr attribute="emphasis" String="&emphasisregex;" />
				<RegExpr attribute="code" String="^([\s]{4,}|\t+).*$" />
				<RegExpr context="bullet" String="^\s*[\*\+\-]\s" />
				<RegExpr context="ordlist" String="^\s*&ordlistregex;\s" />
				<RegExpr attribute="div" String="&divregex;" />
				<!-- <RegExpr attribute="meta" String="^(Title|Author|Date|Copyright|Revision|CSS|LaTeX\ XSLT|Categories|Tags|BaseName|Excerpt):(.*)+$" /> -->
				<IncludeRules context="inc" />

				<!-- GitHub highlighted code -->
				<RegExpr attribute="code" context="highlightnone" String="^\s*```+&blockattrregex;?" beginRegion="code" />
				<!-- Pandoc mdetadata -->
				<RegExpr attribute="meta" context="highlightmeta" String="^---\s*$" />
			</context>

			<context attribute="blockquote" lineEndContext="#pop" name="blockquote">
				<RegExpr attribute="bq-strong" String="&strongregex;" />
				<RegExpr attribute="bq-emphasis" String="&emphasisregex;" />
				<IncludeRules context="inc" />
			</context>

			<context attribute="bullet" lineEndContext="#pop" name="bullet" >
				<RegExpr attribute="bl-strong" String="&strongregex;" />
				<RegExpr attribute="bl-emphasis" String="&emphasisregex;" />
				<IncludeRules context="inc" />
			</context>

			<context attribute="ordlist" lineEndContext="#pop" name="ordlist" >
				<RegExpr attribute="ol-strong" String="&strongregex;" />
				<RegExpr attribute="ol-emphasis" String="&emphasisregex;" />
				<IncludeRules context="inc" />
			</context>

			<context attribute="comment" lineEndContext="#stay" name="comment" >
				<RegExpr String="--&gt;" attribute="comment" context="#pop" endRegion="comment"/>
			</context>

			<context attribute="common" name="inc" lineEndContext="#stay" >
				<RegExpr attribute="code" String="(`+)((?!\1).)+\1(&attrregex;)?" />
				<RegExpr context="comment" String="&lt;!--" beginRegion="comment" />
				<RegExpr attribute="reflink" String="&reflinkregex;" />
				<RegExpr attribute="fnote" String="&fnoteregex;" />
				<RegExpr attribute="fnotetarget" String="&fnotetargetregex;" />
				<RegExpr attribute="span" String="&spanregex;"/>
				<RegExpr attribute="inlinelink" String="&inlinelinkregex;"/>
				<RegExpr attribute="reflinktarget" String="&reflinktargetregex;"/>
				<RegExpr attribute="inlineimage" String="&inlineimageregex;"/>
				<RegExpr attribute="refimage" String="&refimageregex;"/>
				<RegExpr attribute="autolink" String="&autolinkregex;"/>
				<RegExpr attribute="mailtolink" String="&mailtolinkregex;"/>
				<RegExpr attribute="mark" minimal="true" String="&markregex;"/>
				<RegExpr attribute="strikeout" minimal="true" String="&strikeoutregex;"/>
				<RegExpr attribute="subscript" minimal="true" String="&subscriptregex;"/>
				<RegExpr attribute="superscript" minimal="true" String="&superscriptregex;"/>
				<RegExpr attribute="linebreak" minimal="true" String="&linebreakregex;"/>
			</context>

			<!-- GitHub highlighted code -->

			<context attribute="Normal Text" name="highlightnone" lineEndContext="#stay" >
				<IncludeRules context="inccode" />
			</context>

			<context attribute="common" name="inccode" lineEndContext="#stay" >
				<RegExpr attribute="code" context="#pop" String="^```+\s*$" endRegion="code" />
			</context>

            <!-- Pandoc mdetadata -->

			<context attribute="Normal Text" name="highlightmeta" lineEndContext="#stay" >
				<RegExpr attribute="meta" context="#pop" String="^---$" />
				<IncludeRules context="##YAML" includeAttrib="true" />
			</context>

		</contexts>

		<itemDatas>
			<itemData name="Normal Text"     defStyleNum="dsNormal" />
			<itemData name="common"          defStyleNum="dsNormal" />
			<itemData name="strongemphasis"  defStyleNum="dsString" italic="true" bold="true"/>
			<itemData name="emphasis"        defStyleNum="dsString" italic="true" />
			<itemData name="strong"          defStyleNum="dsString" bold="true" />
			<itemData name="ruler"           defStyleNum="dsConstant" bold="true" />
			<itemData name="mark"       defStyleNum="dsString" underline="true" />
			<itemData name="strikeout"       defStyleNum="dsString" strikeOut="true" />
			<itemData name="subscript"       defStyleNum="dsString" />
			<itemData name="superscript"     defStyleNum="dsString" />
			<itemData name="linebreak"       defStyleNum="dsOperator" underline="true" color="#999999"/>
			<itemData name="heading"         defStyleNum="dsFunction" bold="true" />
			<itemData name="blockquote"      defStyleNum="dsDocumentation" />
			<itemData name="bq-emphasis"     defStyleNum="dsDocumentation" italic="true" />
			<itemData name="bq-strong"       defStyleNum="dsDocumentation" bold="true" />
			<itemData name="bullet"          defStyleNum="dsFloat" />
			<itemData name="bl-emphasis"     defStyleNum="dsFloat" italic="true" />
			<itemData name="bl-strong"       defStyleNum="dsFloat" bold="true" />
			<itemData name="ordlist"         defStyleNum="dsFloat" />
			<itemData name="ol-emphasis"     defStyleNum="dsFloat" italic="true" />
			<itemData name="ol-strong"       defStyleNum="dsFloat" bold="true" />
			<itemData name="comment"         defStyleNum="dsComment" />
			<itemData name="code"            defStyleNum="dsVerbatimString" />
			<itemData name="reflink"         defStyleNum="dsControlFlow" underline="true" />
			<itemData name="span"            defStyleNum="dsOthers" underline="true" />
			<itemData name="div"             defStyleNum="dsOthers" underline="true" />
			<itemData name="inlinelink"      defStyleNum="dsControlFlow" underline="true" />
			<itemData name="autolink"        defStyleNum="dsControlFlow" underline="true" />
			<itemData name="mailtolink"      defStyleNum="dsControlFlow" underline="true" />
			<itemData name="fnote"           defStyleNum="dsVariable" italic="true" />
			<itemData name="fnotetarget"     defStyleNum="dsVariable" italic="true" />
			<itemData name="meta"            defStyleNum="dsPreprocessor" />
			<itemData name="reflinktarget"   defStyleNum="dsControlFlow" italic="false" bold="false" />
			<itemData name="inlineimage"     defStyleNum="dsControlFlow" italic="false" bold="false" />
			<itemData name="refimage"        defStyleNum="dsControlFlow" italic="false" bold="false" />
		</itemDatas>

	</highlighting>

	<general>
		<comments>
			<comment name="multiLine" start="&lt;!--" end="--&gt;" region="comment" />
		</comments>
	</general>

</language>