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import re
__all__ = ['spoiler']
_BLOCK_SPOILER_START = re.compile(r'^ {0,3}! ?', re.M)
_BLOCK_SPOILER_MATCH = re.compile(r'^( {0,3}![^\n]*\n)+$')
INLINE_SPOILER_PATTERN = r'>!\s*(?P<spoiler_text>.+?)\s*!<'
def parse_block_spoiler(block, m, state):
text, end_pos = block.extract_block_quote(m, state)
if not text.endswith('\n'):
# ensure it endswith \n to make sure
# _BLOCK_SPOILER_MATCH.match works
text += '\n'
depth = state.depth()
if not depth and _BLOCK_SPOILER_MATCH.match(text):
text = _BLOCK_SPOILER_START.sub('', text)
tok_type = 'block_spoiler'
else:
tok_type = 'block_quote'
# scan children state
child = state.child_state(text)
if state.depth() >= block.max_nested_level - 1:
rules = list(block.block_quote_rules)
rules.remove('block_quote')
else:
rules = block.block_quote_rules
block.parse(child, rules)
token = {'type': tok_type, 'children': child.tokens}
if end_pos:
state.prepend_token(token)
return end_pos
state.append_token(token)
return state.cursor
def parse_inline_spoiler(inline, m, state):
text = m.group('spoiler_text')
new_state = state.copy()
new_state.src = text
children = inline.render(new_state)
state.append_token({'type': 'inline_spoiler', 'children': children})
return m.end()
def render_block_spoiler(renderer, text):
return '<div class="spoiler">\n' + text + '</div>\n'
def render_inline_spoiler(renderer, text):
return '<span class="spoiler">' + text + '</span>'
def spoiler(md):
"""A mistune plugin to support block and inline spoiler. The
syntax is inspired by stackexchange:
.. code-block:: text
Block level spoiler looks like block quote, but with `>!`:
>! this is spoiler
>!
>! the content will be hidden
Inline spoiler is surrounded by `>!` and `!<`, such as >! hide me !<.
:param md: Markdown instance
"""
# reset block quote parser with block spoiler parser
md.block.register('block_quote', None, parse_block_spoiler)
md.inline.register('inline_spoiler', INLINE_SPOILER_PATTERN, parse_inline_spoiler)
if md.renderer and md.renderer.NAME == 'html':
md.renderer.register('block_spoiler', render_block_spoiler)
md.renderer.register('inline_spoiler', render_inline_spoiler)
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