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Partial functions like `head` lead to avoidable errors and should be
avoided. They are replaced with total functions.
This fixes #2991.
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Org mode allows arbitrary raw inlines ("export snippets" in Emacs
parlance) to be included as `@@format:raw foreign format text@@`.
Support for this features is added to the Org reader.
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A specification for an official Org-mode citation syntax was drafted by
Richard Lawrence and enhanced with the help of others on the orgmode
mailing list. Basic support for this citation style is added to the
reader.
This closes #1978.
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Semicolons are used as special characters in citations syntax. This
ensures the correct parsing of Pandoc-style citations:
[prefix; @key; suffix]
Previously, parsing would have failed unless there was a space or other
special character as the last <prefix> character.
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Parsing of special strings (like '...' as ellipsis or '--' as en dash)
can be toggled using the `-` option.
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Parsing of emphasized text can be toggled using the `*` option. This
influences parsing of text marked as emphasized, strong, strikeout, and
underline. Parsing of inline math, code, and verbatim text is not
affected by this option.
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Reading of smart quotes can be toggled using the `'` option.
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The `OrgParserState` contained both an `orgStateMeta` and
`orgStateMeta'` field, the former for plain meta information and the
latter for F-monad wrapped meta info. The plain meta info is only used
to make `OrgParserState` an instance of the `HasMeta` class, which in
turn is never used in the reader. The (F Meta) version is hence renamed
to the "un-primed" version while the other one is dropped.
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Some code was duplicated (copy-pasted) or placed in an inappropriate
module during the modularization refactoring. Those functions are moved
into a `Shared` module, as was originally intended but forgotten.
Better documentation of the respective functions is a positive
side-effect.
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Org reader: support org-ref style citations
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Org-mode version 9 usees a new syntax for export blocks. Instead of
`#+BEGIN_<FORMAT>`, where `<FORMAT>` is the format of the block's
content, the new format uses `#+BEGIN_export <FORMAT>` instead. Both
types are supported.
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- Reorder functions, grouping related functions together.
- Demote simple functions to local functions if they are used just once.
- Rename and document functions to increase code readability.
- Fix handling of whitespace in blocks, allowing content to be indented
less then the block header.
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Having a function starting with `parse` in a parsing library is overly
redundant. Let's use a nicer, shorter name more in line with the rest
of the library.
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The *org-ref* package is an org-mode extension commonly used to manage
citations in org documents. Basic support for the `cite:citeKey` and
`[[cite:citeKey][prefix text::suffix text]]` syntax is added.
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Block parsing code is moved to a separate module.
This is part of the Org-mode reader cleanup effort.
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Inline parsing code is moved to a separate module. Parsers for block
starts are extracted as well, as those are used in the `endline` parser.
This is part of the Org-mode reader cleanup effort.
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The Org-mode reader uses many functions defined in the
`Text.Pandoc.Parsing` utility module. Some of the functions are
overwritten with versions adapted to Org-mode idiosyncrasies. These
special functions, as well as the normal Pandoc versions, are combined
in a single module to increase the ease of use.
This leads to decoupling of Org-mode and Pandoc and hence to slightly
cleaner code. The downside is code-bloat due to repeated import/export
statements.
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The `d` export option can be used to control which drawers are exported
and which are discarded. Basic support for this option is added here.
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A parser state attribute was used to keep track of block attributes
defined in meta-lines. Global state is undesirable, so block attributes
are no longer saved as part of the parser state. Old functions and the
respective part of the parser state are removed.
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Org-mode allows to specify export settings via `#+OPTIONS` lines.
Disabling simple sub- and superscripts is one of these export options,
this options is now supported.
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The org reader code has become large and confusing. Extracting smaller
parts into submodules should help to clean things up.
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