RFR: JDK-8298405: Support Markdown in the standard doclet [v5]

[Pavel Rappo]

On Tue, 7 Feb 2023 19:42:39 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Support for Markdown comments in the standard doclet.
>> 
>> To enable Markdown in a comment, start the comment with `/**md` followed by whitespace.  The syntax is as defined for CommonMark.
>> 
>> The work is in 3 parts:
>> 
>> 1. Update the Compiler Tree API to support Markdown tree nodes, containing strings of (uninterpreted) Markdown source code.
>> 2. Import commonmark-java into the `jdk.javadoc` module, to be able to convert Markdown strings to HTML.
>> 3. Update the standard doclet, to leverage the preceding two parts, to translate Markdown in documentation comments to `Content` nodes.
>> 
>> There are new tests both for the low level work in the Compiler Tree API, and for the overall high-level work in the doclet.
>> 
>> Background info: https://mail.openjdk.org/pipermail/javadoc-dev/2023-January/005563.html
>
> Jonathan Gibbons has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:
> 
>  - Merge with upstream/master
>  - Rename MarkdownTree to RawTextTree
>  - Merge with upstream/master
>  - Update copyright years
>  - Rename FFFC variable
>    Share Markdown parser and renderer in instance of MarkdownHandler
>  - Move CommonMark to new internal module.
>    Add legal header to imported CommonMark source files
>    Always use Text nodes inside AttributeTree values
>    Unwrap <p> from "simple" paragraphs
>  - Always use Text nodes inside AttributeTree values
>  - Update to CommonMark 0.21.
>  - fix whitespace
>  - JDK-8298405: Markdown support in the standard doclet

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PR: https://git.openjdk.org/jdk/pull/11701