Element attributes are pushed to the stack via the `Attributes`
function. `Attributes` creates an Attr like triple, but the triple also
allows table-like access to key-value pairs.
Lua string are used to represent nullary data constructors. The previous
table-based representation was based on the JSON serialization, but can
be simplified. This also matches the way those arguments are passed to
custom writers.
The lua filters and custom lua writer system defined very similar
StackValue instances for strings and tuples. These instance definitions
are extracted to a separate module to enable sharing.
Native lua booleans and strings are used to represent MetaBool and
MetaString values. This is more natural than the previous table-based
representation. The old lua representation can still be read back to
haskell, ensuring compatibility with the `pandoc.MetaBool` and
`pandoc.MetaString` lua constructors.
Filtering functions take element components as arguments instead of the
whole block elements. This resembles the way elements are handled in
custom writers.
Instead of taking the whole inline element, forcing users to destructure it
themselves, the components of the elements are passed to the filtering
functions.
The docx writer takes components from the distribution's
version of reference.docx when it can't find them in a
user's custom reference.docx. (This sometimes happens
because Word will sometimes omit components needed for larger
documents when saving a simple one.)
Previously, we allowed a reference.docx in the data directory
(e.g. `~/.pandoc`) to be used as the distribution's reference.docx.
This led to a bizarre situation where pandoc would produce a
good docx using `--template ~/.pandoc/ref.docx`, but if `ref.docx`
were moved to `~/.pandoc/reference.docx`, it would then produce
a corrupted docx.
Closes#3322 (I think).
Reading of simple block values from the lua stack is handled manually,
but most block constructors are still handled via instances of aeson's
Value type.
Getting inline instances from the lua stack is handled manually for some
simple inline constructors, including the `Str` constructor. This avoids
the indirect route through aeson's Value type and improves performance
considerably (approx. 30% speedup for some filters).
Updated the LaTeX writer to also include \VerbatimFootnotes in the
preamble for highlighted code blocks. Previously this was only done for
raw code blocks.
These are caught (and lead to exit) in pandoc.hs, but
other uses of Text.Pandoc.App may want to recover in another
way.
Added PandocAppError to PandocError (API change).
This is a stopgap: later we should have a separate constructor
for each type of error.
Also fixed uses of 'exit' in Shared.readDataFile, and
removed 'err' from Shared (API change).
Finally, removed the dependency on extensible-exceptions.
See #3548.
Plain text readers are exposed to lua scripts via the `pandoc.reader`
submodule, which is further subdivided by format. Converting e.g. a
markdown string into a pandoc document is possible from within lua:
doc = pandoc.reader.markdown.read_doc("Hello, World!")
A `read_block` convenience function is provided for all formats,
although it will still parse the whole string but return only the first
block as the result.
Custom reader options are not supported yet, default options are used
for all parsing operations.
Closes#3547.
Macro definitions are inserted in the template when there is highlighted
code.
Limitations: background colors and underline currently not
supported.
