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from __future__ import unicode_literals |
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from CommonMark.render.renderer import Renderer |
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class ReStructuredTextRenderer(Renderer): |
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""" |
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Render reStructuredText from Markdown |
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Example: |
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.. code:: python |
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import CommonMark |
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parser = CommonMark.Parser() |
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ast = parser.parse('Hello `inline code` example') |
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renderer = CommonMark.ReStructuredTextRenderer() |
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rst = renderer.render(ast) |
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print(rst) # Hello ``inline code`` example |
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""" |
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def __init__(self, indent_char=' '): |
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self.indent_char = indent_char |
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self.indent_length = 0 |
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def lit(self, s): |
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if s == '\n': |
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indent = '' # Avoid whitespace if we're just adding a newline |
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elif self.last_out != '\n': |
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indent = '' # Don't indent if we're in the middle of a line |
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else: |
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indent = self.indent_char * self.indent_length |
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return super(ReStructuredTextRenderer, self).lit(indent + s) |
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def cr(self): |
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self.lit('\n') |
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def indent_lines(self, literal, indent_length=4): |
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indent = self.indent_char * indent_length |
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new_lines = [] |
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for line in literal.splitlines(): |
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new_lines.append(indent + line) |
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return '\n'.join(new_lines) |
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# Nodes |
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def document(self, node, entering): |
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pass |
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def softbreak(self, node, entering): |
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self.cr() |
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def linebreak(self, node, entering): |
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self.cr() |
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self.cr() |
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def text(self, node, entering): |
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self.out(node.literal) |
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def emph(self, node, entering): |
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self.out('*') |
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def strong(self, node, entering): |
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self.out('**') |
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def paragraph(self, node, entering): |
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if node.parent.t == 'item': |
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pass |
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else: |
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self.cr() |
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def link(self, node, entering): |
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if entering: |
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self.out('`') |
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else: |
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self.out(' <%s>`_' % node.destination) |
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def image(self, node, entering): |
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directive = '.. image:: ' + node.destination |
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if entering: |
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self.out(directive) |
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self.cr() |
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self.indent_length += 4 |
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self.out(':alt: ') |
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else: |
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self.indent_length -= 4 |
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def code(self, node, entering): |
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self.out('``') |
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self.out(node.literal) |
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self.out('``') |
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def code_block(self, node, entering): |
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directive = '.. code::' |
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language_name = None |
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info_words = node.info.split() if node.info else [] |
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if len(info_words) > 0 and len(info_words[0]) > 0: |
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language_name = info_words[0] |
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if language_name: |
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directive += ' ' + language_name |
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self.cr() |
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self.out(directive) |
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self.cr() |
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self.cr() |
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self.out(self.indent_lines(node.literal)) |
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self.cr() |
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def list(self, node, entering): |
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if entering: |
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self.cr() |
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def item(self, node, entering): |
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tagname = '*' if node.list_data['type'] == 'bullet' else '#.' |
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if entering: |
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self.out(tagname + ' ') |
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else: |
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self.cr() |
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def block_quote(self, node, entering): |
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if entering: |
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self.indent_length += 4 |
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else: |
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self.indent_length -= 4 |
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def heading(self, node, entering): |
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heading_chars = [ |
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'#', |
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'*', |
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'=', |
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'-', |
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'^', |
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'"' |
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] |
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try: |
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heading_char = heading_chars[node.level-1] |
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except IndexError: |
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# Default to the last level if we're in too deep |
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heading_char = heading_chars[-1] |
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heading_length = len(node.first_child.literal) |
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banner = heading_char * heading_length |
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if entering: |
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self.cr() |
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else: |
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self.cr() |
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self.out(banner) |
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self.cr() |
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MikeCoder /
markdown-preview.vim
