This fixes a problem where the encoding used for Lua filenames would
sometimes mismatch the encoding used by the OS. The file wasn't found
when that happened, for example with an umlaut-containing filename on
Windows. The change ensures that all characters of available in the
default locale can be used in the filename.
Lua 5.4 is used by default after this is merged. Packagers may still include Lua 5.3
instead by building pandoc with `--constraint='hslua <2.2'`.
Differences between 5.3 and 5.4 should not generally affect pandoc Lua filters.
See list of incompatible changes here <https://www.lua.org/manual/5.4/manual.html#8.1>
- Allow any type of callable object as argument to List
functions `filter`, `map`, and `find_if`. These previously
required the argument to be of type `function`, which was too
restrictive.
- Inline: the type of Image captions is now `Inlines` instead
of `List`.
The objects now also follow the principle that element attributes are
accessible through the `.attr` field. Rows in `TableHead` and
`TableFoot` are available via the `.rows` field. Row objects have a
`.cells` field, containing the list of table cells.
Closes: #7718
The traversal order of filters can now be selected by setting the key
`traverse` of the filter to either `'topdown'` or `'typewise'`; the
default remains `'typewise'`.
Topdown traversals can be cut short by returning `false` as a second
value from the filter function. No child-element of the returned element
is processed in that case.
- `walk` methods are added to `Block` and `Inline` values; the methods
are similar to `pandoc.utils.walk_block` and
`pandoc.utils.walk_inline`, but apply to filter also to the element
itself, and therefore return a list of element instead of a single
element.
- Functions of name `Doc` are no longer accepted as alternatives for
`Pandoc` filter functions. This functionality was undocumented.
