1 files changed, 131 insertions, 0 deletions
diff --git a/app/lib/mdx_attr_list/mdx_attr_list.py b/app/lib/mdx_attr_list/mdx_attr_list.py
new file mode 100644
index 0000000..3b77e3c
--- /dev/null
+++ b/app/lib/mdx_attr_list/mdx_attr_list.py
@@ -0,0 +1,131 @@
+# -*- coding: utf-8 -*-
+# from https://gist.githubusercontent.com/richardcrichardc/9520176/raw/a848cd953bf502a3d236ace24bd7f6d3af0d421f/attr_list.py
+from __future__ import unicode_literals
+
+import re
+
+from markdown.extensions import Extension
+from markdown.extensions.attr_list import AttrListTreeprocessor as _AttrListTreeprocessor, isheader
+from markdown.util import isBlockLevel
+
+
+class AttrListExtension(Extension):
+    def extendMarkdown(self, md, md_globals):
+        md.treeprocessors.add('attr_list', AttrListTreeprocessor(md), '>prettify')
+
+class AttrListTreeprocessor(_AttrListTreeprocessor):
+    BASE_RE = r'\{\:([^\}]*)\}'
+    PARENT_RE = r'\{\^([^\}]*)\}'
+    HEADER_RE = re.compile(r'[ ]+%s[ ]*$' % BASE_RE)
+    BLOCK_RE = re.compile(r'\n[ ]*%s[ ]*$' % BASE_RE)
+    LIST_RE = re.compile(r'\n[ ]*%s[ ]*$' % PARENT_RE)
+    INLINE_RE = re.compile(r'^%s' % BASE_RE)
+    
+    
+    def _get_last_child(self, elem):
+        if len(elem):
+            return self._get_last_child(elem[-1])
+        
+        return elem
+    
+    def _is_list(self, elem):
+        return elem.tag in ['dl', 'ol', 'ul']
+    
+    
+    def run(self, doc):
+        for elem in doc.getiterator():
+            if isBlockLevel(elem.tag):
+                if self._is_list(elem):
+                    lc = self._get_last_child(elem)
+                    attr = None
+                    
+                    if lc.tail and lc.tail.strip():
+                        attr = 'tail'
+                    elif lc.text.strip():
+                        attr = 'text'
+                    
+                    if attr:
+                        text = getattr(lc, attr)
+                        
+                        m = self.LIST_RE.search(text)
+                        
+                        if m:
+                            self.assign_attrs(elem, m.group(1))
+                            setattr(lc, attr, text[:m.start()])
+                    
+                    continue
+                
+                # Block level: check for attrs on last line of text
+                RE = self.BLOCK_RE
+                
+                if isheader(elem) or elem.tag == 'dt':
+                    # header or def-term: check for attrs at end of line
+                    RE = self.HEADER_RE
+                
+                if len(elem) and elem.tag == 'li':
+                    # special case list items. children may include a ul or ol.
+                    pos = None
+                    # find the ul or ol position
+                    for i, child in enumerate(elem):
+                        if child.tag in ['ul', 'ol']:
+                            pos = i
+                            
+                            break
+                    
+                    if pos is None and elem[-1].tail:
+                        # use tail of last child. no ul or ol.
+                        m = RE.search(elem[-1].tail)
+                        
+                        if m:
+                            self.assign_attrs(elem, m.group(1))
+                            elem[-1].tail = elem[-1].tail[:m.start()]
+                    elif pos is not None and pos > 0 and elem[pos-1].tail:
+                        # use tail of last child before ul or ol
+                        m = RE.search(elem[pos-1].tail)
+                        
+                        if m:
+                            self.assign_attrs(elem, m.group(1))
+                            elem[pos-1].tail = elem[pos-1].tail[:m.start()]
+                    elif elem.text:
+                        # use text. ul is first child.
+                        m = RE.search(elem.text)
+                        
+                        if m:
+                            self.assign_attrs(elem, m.group(1))
+                            elem.text = elem.text[:m.start()]
+                elif len(elem) and elem[-1].tail:
+                    # has children. Get from tail of last child
+                    m = RE.search(elem[-1].tail)
+                    
+                    if m:
+                        self.assign_attrs(elem, m.group(1))
+                        elem[-1].tail = elem[-1].tail[:m.start()]
+                        
+                        if isheader(elem):
+                            # clean up trailing #s
+                            elem[-1].tail = elem[-1].tail.rstrip('#').rstrip()
+                elif elem.text:
+                    # no children. Get from text.
+                    m = RE.search(elem.text)
+                    
+                    if m:
+                        self.assign_attrs(elem, m.group(1))
+                        elem.text = elem.text[:m.start()]
+                        
+                        if isheader(elem):
+                            # clean up trailing #s
+                            elem.text = elem.text.rstrip('#').rstrip()
+            else:
+                # inline: check for attrs at start of tail
+                if elem.tail:
+                    m = self.INLINE_RE.match(elem.tail)
+                    
+                    if m:
+                        self.assign_attrs(elem, m.group(1))
+                        elem.tail = elem.tail[m.end():]
+
+def makeExtension(configs = None):
+    if configs is None:
+        configs = {}
+    
+    return AttrListExtension(configs)