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markdown.kak: Clean up code-block and code-span formatting.

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Previously, a code block was anything between triple-backtics, including inline
blocks:

        some text ```
        not a codeblock, but highlighted as one
        ``` other text

and even if the closing backticks had the wrong indent:

        ```
        this is a code block containing a triple backtick
            ```
        this is still a code block, but Kakoune thinks otherwise
        ```

Now we use the -match-capture flag to ensure the start and end fences have
exactly the same indent.

Previously, the generic code-block region was defined first, which meant that
it took priority over all the language-specific highlighters. Now we define
the generic code-block highlighting *after* the others, which fixes #2304.

Previously, code-spans were defined as ordinary inline markup, but in Markdown
ordinary formatting doesn't work inside code-spans. Therefore, they are now
regions unto themselves, defined according to section 6.3 of the CommonMark
spec <https://spec.commonmark.org/0.28/#code-spans>, which addresses a comment
on #2111.
This commit is contained in:
Tim Allen 2018-09-18 18:55:24 +10:00
parent af8dd681d5
commit 535abe2ba7
1 changed files with 7 additions and 4 deletions
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11
rc/base/markdown.kak
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@ -13,7 +13,6 @@ hook global BufCreate .*[.](markdown|md|mkd) %{
add-highlighter shared/markdown regions
add-highlighter shared/markdown/content default-region group
add-highlighter shared/markdown/code region ``` ``` fill meta
evaluate-commands %sh{
languages="
@ -23,13 +22,19 @@ evaluate-commands %sh{
sass scala scss sh swift tupfile typescript yaml
"
for lang in ${languages}; do
printf 'add-highlighter shared/markdown/%s region ```\h*%s\\b ``` regions\n' "${lang}" "${lang}"
printf 'add-highlighter shared/markdown/%s region -match-capture ^(\h*)```\h*%s\\b ^(\h*)``` regions\n' "${lang}" "${lang}"
printf 'add-highlighter shared/markdown/%s/ default-region fill meta\n' "${lang}"
[ "${lang}" = kak ] && ref=kakrc || ref="${lang}"
printf 'add-highlighter shared/markdown/%s/inner region \A```[^\\n]*\K (?=```) ref %s\n' "${lang}" "${ref}"
done
}
add-highlighter shared/markdown/codeblock region -match-capture \
^(\h*)```\h* \
^(\h*)```\h*$ \
fill meta
add-highlighter shared/markdown/codespan region -match-capture (`+) (`+) fill mono
# Setext-style header
add-highlighter shared/markdown/content/ regex (\A|\n\n)[^\n]+\n={2,}\h*\n\h*$ 0:title
add-highlighter shared/markdown/content/ regex (\A|\n\n)[^\n]+\n-{2,}\h*\n\h*$ 0:header
@ -39,8 +44,6 @@ add-highlighter shared/markdown/content/ regex ^(#+)(\h+)([^\n]+) 1:header
add-highlighter shared/markdown/content/ regex ^\h?((?:[\s\t]+)?[-\*])\h+[^\n]*(\n\h+[^-\*]\S+[^\n]*\n)*$ 0:list 1:bullet
add-highlighter shared/markdown/content/ regex \B\+[^\n]+?\+\B 0:mono
add-highlighter shared/markdown/content/ regex [^`](`([^\s`]|([^\s`](\n?[^\n`])*[^\s`]))`)[^`] 1:mono
add-highlighter shared/markdown/content/ regex [^`](``([^\s`]|([^\s`](\n?[^\n`])*[^\s`]))``)[^`] 1:mono
add-highlighter shared/markdown/content/ regex [^*](\*([^\s*]|([^\s*](\n?[^\n*])*[^\s*]))\*)[^*] 1:italic
add-highlighter shared/markdown/content/ regex [^_](_([^\s_]|([^\s_](\n?[^\n_])*[^\s_]))_)[^_] 1:italic
add-highlighter shared/markdown/content/ regex [^*](\*\*([^\s*]|([^\s*](\n?[^\n*])*[^\s*]))\*\*)[^*] 1:bold