Docserver: Support markdown for HTML content. Request thirdparty submission review.

third_party/markdown/extensions/admonition.py

Index: third_party/markdown/extensions/admonition.py
diff --git a/third_party/markdown/extensions/admonition.py b/third_party/markdown/extensions/admonition.py
new file mode 100644
index 0000000000000000000000000000000000000000..48e3aaac06e0fe2014e273e2a6e845a1cac53b56
--- /dev/null
+++ b/third_party/markdown/extensions/admonition.py
@@ -0,0 +1,150 @@
+# markdown is released under the BSD license
+# Copyright 2007, 2008 The Python Markdown Project (v. 1.7 and later)
+# Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b)
+# Copyright 2004 Manfred Stienstra (the original version)
+# 
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 
+# *   Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+# *   Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+# *   Neither the name of the <organization> nor the
+#     names of its contributors may be used to endorse or promote products
+#     derived from this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE PYTHON MARKDOWN PROJECT ''AS IS'' AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL ANY CONTRIBUTORS TO THE PYTHON MARKDOWN PROJECT
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+
+"""
+Admonition extension for Python-Markdown
+========================================
+
+Adds rST-style admonitions. Inspired by [rST][] feature with the same name.
+
+The syntax is (followed by an indented block with the contents):
+    !!! [type] [optional explicit title]
+
+Where `type` is used as a CSS class name of the div. If not present, `title`
+defaults to the capitalized `type`, so "note" -> "Note".
+
+rST suggests the following `types`, but you're free to use whatever you want:
+    attention, caution, danger, error, hint, important, note, tip, warning
+
+
+A simple example:
+    !!! note
+        This is the first line inside the box.
+
+Outputs:
+    <div class="admonition note">
+    <p class="admonition-title">Note</p>
+    <p>This is the first line inside the box</p>
+    </div>
+
+You can also specify the title and CSS class of the admonition:
+    !!! custom "Did you know?"
+        Another line here.
+
+Outputs:
+    <div class="admonition custom">
+    <p class="admonition-title">Did you know?</p>
+    <p>Another line here.</p>
+    </div>
+
+[rST]: http://docutils.sourceforge.net/docs/ref/rst/directives.html#specific-admonitions
+
+By [Tiago Serafim](http://www.tiagoserafim.com/).
+
+"""
+
+from __future__ import absolute_import
+from __future__ import unicode_literals
+from . import Extension
+from ..blockprocessors import BlockProcessor
+from ..util import etree
+import re
+
+
+class AdmonitionExtension(Extension):
+    """ Admonition extension for Python-Markdown. """
+
+    def extendMarkdown(self, md, md_globals):
+        """ Add Admonition to Markdown instance. """
+        md.registerExtension(self)
+
+        md.parser.blockprocessors.add('admonition',
+                                      AdmonitionProcessor(md.parser),
+                                      '_begin')
+
+
+class AdmonitionProcessor(BlockProcessor):
+
+    CLASSNAME = 'admonition'
+    CLASSNAME_TITLE = 'admonition-title'
+    RE = re.compile(r'(?:^|\n)!!!\ ?([\w\-]+)(?:\ "(.*?)")?')
+
+    def test(self, parent, block):
+        sibling = self.lastChild(parent)
+        return self.RE.search(block) or \
+            (block.startswith(' ' * self.tab_length) and sibling and \
+                sibling.get('class', '').find(self.CLASSNAME) != -1)
+
+    def run(self, parent, blocks):
+        sibling = self.lastChild(parent)
+        block = blocks.pop(0)
+        m = self.RE.search(block)
+
+        if m:
+            block = block[m.end() + 1:]  # removes the first line
+
+        block, theRest = self.detab(block)
+
+        if m:
+            klass, title = self.get_class_and_title(m)
+            div = etree.SubElement(parent, 'div')
+            div.set('class', '%s %s' % (self.CLASSNAME, klass))
+            if title:
+                p = etree.SubElement(div, 'p')
+                p.text = title
+                p.set('class', self.CLASSNAME_TITLE)
+        else:
+            div = sibling
+
+        self.parser.parseChunk(div, block)
+
+        if theRest:
+            # This block contained unindented line(s) after the first indented
+            # line. Insert these lines as the first block of the master blocks
+            # list for future processing.
+            blocks.insert(0, theRest)
+
+    def get_class_and_title(self, match):
+        klass, title = match.group(1).lower(), match.group(2)
+        if title is None:
+            # no title was provided, use the capitalized classname as title
+            # e.g.: `!!! note` will render `<p class="admonition-title">Note</p>`
+            title = klass.capitalize()
+        elif title == '':
+            # an explicit blank title should not be rendered
+            # e.g.: `!!! warning ""` will *not* render `p` with a title
+            title = None
+        return klass, title
+
+
+def makeExtension(configs={}):
+    return AdmonitionExtension(configs=configs)