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{-# LANGUAGE DeriveDataTypeable, DeriveGeneric #-}
{-
Copyright (C) 2012-2016 John MacFarlane <jgm@berkeley.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
{- |
Module : Text.Pandoc.Extensions
Copyright : Copyright (C) 2012-2016 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Data structures and functions for representing markup extensions.
-}
module Text.Pandoc.Extensions ( Extension(..)
, Extensions
, emptyExtensions
, extensionsFromList
, extensionEnabled
, enableExtension
, disableExtension
, pandocExtensions
, plainExtensions
, strictExtensions
, phpMarkdownExtraExtensions
, githubMarkdownExtensions
, multimarkdownExtensions )
where
import Data.Bits (testBit, setBit, clearBit)
import Data.Data (Data)
import Data.Typeable (Typeable)
import GHC.Generics (Generic)
newtype Extensions = Extensions Integer
deriving (Show, Read, Eq, Ord, Data, Typeable, Generic)
extensionsFromList :: [Extension] -> Extensions
extensionsFromList = foldr enableExtension emptyExtensions
emptyExtensions :: Extensions
emptyExtensions = Extensions 0
extensionEnabled :: Extension -> Extensions -> Bool
extensionEnabled x (Extensions exts) = testBit exts (fromEnum x)
enableExtension :: Extension -> Extensions -> Extensions
enableExtension x (Extensions exts) = Extensions (setBit exts (fromEnum x))
disableExtension :: Extension -> Extensions -> Extensions
disableExtension x (Extensions exts) = Extensions (clearBit exts (fromEnum x))
-- | Individually selectable syntax extensions.
data Extension =
Ext_footnotes -- ^ Pandoc/PHP/MMD style footnotes
| Ext_inline_notes -- ^ Pandoc-style inline notes
| Ext_pandoc_title_block -- ^ Pandoc title block
| Ext_yaml_metadata_block -- ^ YAML metadata block
| Ext_mmd_title_block -- ^ Multimarkdown metadata block
| Ext_table_captions -- ^ Pandoc-style table captions
| Ext_implicit_figures -- ^ A paragraph with just an image is a figure
| Ext_simple_tables -- ^ Pandoc-style simple tables
| Ext_multiline_tables -- ^ Pandoc-style multiline tables
| Ext_grid_tables -- ^ Grid tables (pandoc, reST)
| Ext_pipe_tables -- ^ Pipe tables (as in PHP markdown extra)
| Ext_citations -- ^ Pandoc/citeproc citations
| Ext_raw_tex -- ^ Allow raw TeX (other than math)
| Ext_raw_html -- ^ Allow raw HTML
| Ext_tex_math_dollars -- ^ TeX math between $..$ or $$..$$
| Ext_tex_math_single_backslash -- ^ TeX math btw \(..\) \[..\]
| Ext_tex_math_double_backslash -- ^ TeX math btw \\(..\\) \\[..\\]
| Ext_latex_macros -- ^ Parse LaTeX macro definitions (for math only)
| Ext_fenced_code_blocks -- ^ Parse fenced code blocks
| Ext_fenced_code_attributes -- ^ Allow attributes on fenced code blocks
| Ext_backtick_code_blocks -- ^ GitHub style ``` code blocks
| Ext_inline_code_attributes -- ^ Allow attributes on inline code
| Ext_markdown_in_html_blocks -- ^ Interpret as markdown inside HTML blocks
| Ext_native_divs -- ^ Use Div blocks for contents of <div> tags
| Ext_native_spans -- ^ Use Span inlines for contents of <span>
| Ext_bracketed_spans -- ^ Bracketed spans with attributes
| Ext_markdown_attribute -- ^ Interpret text inside HTML as markdown
-- iff container has attribute 'markdown'
| Ext_escaped_line_breaks -- ^ Treat a backslash at EOL as linebreak
| Ext_link_attributes -- ^ link and image attributes
| Ext_mmd_link_attributes -- ^ MMD style reference link attributes
| Ext_autolink_bare_uris -- ^ Make all absolute URIs into links
| Ext_fancy_lists -- ^ Enable fancy list numbers and delimiters
| Ext_lists_without_preceding_blankline -- ^ Allow lists without preceding blank
| Ext_startnum -- ^ Make start number of ordered list significant
| Ext_definition_lists -- ^ Definition lists as in pandoc, mmd, php
| Ext_compact_definition_lists -- ^ Definition lists without
-- space between items, and disallow laziness
| Ext_example_lists -- ^ Markdown-style numbered examples
| Ext_all_symbols_escapable -- ^ Make all non-alphanumerics escapable
| Ext_angle_brackets_escapable -- ^ Make < and > escapable
| Ext_intraword_underscores -- ^ Treat underscore inside word as literal
| Ext_blank_before_blockquote -- ^ Require blank line before a blockquote
| Ext_blank_before_header -- ^ Require blank line before a header
| Ext_strikeout -- ^ Strikeout using ~~this~~ syntax
| Ext_superscript -- ^ Superscript using ^this^ syntax
| Ext_subscript -- ^ Subscript using ~this~ syntax
| Ext_hard_line_breaks -- ^ All newlines become hard line breaks
| Ext_ignore_line_breaks -- ^ Newlines in paragraphs are ignored
| Ext_east_asian_line_breaks -- ^ Newlines in paragraphs are ignored between
-- East Asian wide characters
| Ext_literate_haskell -- ^ Enable literate Haskell conventions
| Ext_abbreviations -- ^ PHP markdown extra abbreviation definitions
| Ext_emoji -- ^ Support emoji like :smile:
| Ext_auto_identifiers -- ^ Automatic identifiers for headers
| Ext_ascii_identifiers -- ^ ascii-only identifiers for headers
| Ext_header_attributes -- ^ Explicit header attributes {#id .class k=v}
| Ext_mmd_header_identifiers -- ^ Multimarkdown style header identifiers [myid]
| Ext_implicit_header_references -- ^ Implicit reference links for headers
| Ext_line_blocks -- ^ RST style line blocks
| Ext_epub_html_exts -- ^ Recognise the EPUB extended version of HTML
| Ext_shortcut_reference_links -- ^ Shortcut reference links
| Ext_smart -- ^ "Smart" quotes, apostrophes, ellipses, dashes
| Ext_old_dashes -- ^ -- = em, - before number = en
deriving (Show, Read, Enum, Eq, Ord, Bounded, Data, Typeable, Generic)
pandocExtensions :: Extensions
pandocExtensions = extensionsFromList
[ Ext_footnotes
, Ext_inline_notes
, Ext_pandoc_title_block
, Ext_yaml_metadata_block
, Ext_table_captions
, Ext_implicit_figures
, Ext_simple_tables
, Ext_multiline_tables
, Ext_grid_tables
, Ext_pipe_tables
, Ext_citations
, Ext_raw_tex
, Ext_raw_html
, Ext_tex_math_dollars
, Ext_latex_macros
, Ext_fenced_code_blocks
, Ext_fenced_code_attributes
, Ext_backtick_code_blocks
, Ext_inline_code_attributes
, Ext_markdown_in_html_blocks
, Ext_native_divs
, Ext_native_spans
, Ext_bracketed_spans
, Ext_escaped_line_breaks
, Ext_fancy_lists
, Ext_startnum
, Ext_definition_lists
, Ext_example_lists
, Ext_all_symbols_escapable
, Ext_intraword_underscores
, Ext_blank_before_blockquote
, Ext_blank_before_header
, Ext_strikeout
, Ext_superscript
, Ext_subscript
, Ext_auto_identifiers
, Ext_header_attributes
, Ext_link_attributes
, Ext_implicit_header_references
, Ext_line_blocks
, Ext_shortcut_reference_links
, Ext_smart
]
plainExtensions :: Extensions
plainExtensions = extensionsFromList
[ Ext_table_captions
, Ext_implicit_figures
, Ext_simple_tables
, Ext_multiline_tables
, Ext_grid_tables
, Ext_latex_macros
, Ext_fancy_lists
, Ext_startnum
, Ext_definition_lists
, Ext_example_lists
, Ext_intraword_underscores
, Ext_blank_before_blockquote
, Ext_blank_before_header
, Ext_strikeout
]
phpMarkdownExtraExtensions :: Extensions
phpMarkdownExtraExtensions = extensionsFromList
[ Ext_footnotes
, Ext_pipe_tables
, Ext_raw_html
, Ext_markdown_attribute
, Ext_fenced_code_blocks
, Ext_definition_lists
, Ext_intraword_underscores
, Ext_header_attributes
, Ext_link_attributes
, Ext_abbreviations
, Ext_shortcut_reference_links
]
githubMarkdownExtensions :: Extensions
githubMarkdownExtensions = extensionsFromList
[ Ext_angle_brackets_escapable
, Ext_pipe_tables
, Ext_raw_html
, Ext_fenced_code_blocks
, Ext_auto_identifiers
, Ext_ascii_identifiers
, Ext_backtick_code_blocks
, Ext_autolink_bare_uris
, Ext_intraword_underscores
, Ext_strikeout
, Ext_hard_line_breaks
, Ext_emoji
, Ext_lists_without_preceding_blankline
, Ext_shortcut_reference_links
]
multimarkdownExtensions :: Extensions
multimarkdownExtensions = extensionsFromList
[ Ext_pipe_tables
, Ext_raw_html
, Ext_markdown_attribute
, Ext_mmd_link_attributes
-- , Ext_raw_tex
-- Note: MMD's raw TeX syntax requires raw TeX to be
-- enclosed in HTML comment
, Ext_tex_math_double_backslash
, Ext_intraword_underscores
, Ext_mmd_title_block
, Ext_footnotes
, Ext_definition_lists
, Ext_all_symbols_escapable
, Ext_implicit_header_references
, Ext_auto_identifiers
, Ext_mmd_header_identifiers
, Ext_implicit_figures
-- Note: MMD's syntax for superscripts and subscripts
-- is a bit more permissive than pandoc's, allowing
-- e^2 and a~1 instead of e^2^ and a~1~, so even with
-- these options we don't have full support for MMD
-- superscripts and subscripts, but there's no reason
-- not to include these:
, Ext_superscript
, Ext_subscript
]
strictExtensions :: Extensions
strictExtensions = extensionsFromList
[ Ext_raw_html
, Ext_shortcut_reference_links
]
|
