feature: first slide rendering and acceptance test based on html renderer

renderer/slide_break.py

@@ -0,0 +1,35 @@
+
+# ^\s*---\s*(.*)\s*$
+import re
+
+from mistletoe.block_token import BlockToken, tokenize
+
+
+class SlideBreak(BlockToken):
+    @staticmethod
+    def start(line):
+        return re.match(r"^\s*---.*$", line)
+
+    @classmethod
+    def read(cls, lines):
+        child_lines = []
+        first_line = next(lines) # Consume the line that started the slide break
+
+        match = re.match(r"^\s*---\s*(.*)\s*.*$", first_line)
+        attribute = match.group(1) if match.group(1) else None
+
+        # We have to work with peak here, since a normal for loop would already
+        # consume the next line, which might be a `---` line that marks the
+        # beginning of a new slide as well
+        next_line = lines.peek()
+        while next_line is not None:
+            if re.match(r"^\s*---.*$", next_line) :
+                break 
+            else:
+                child_lines.append(next(lines))
+                next_line = lines.peek()
+
+        return tokenize(child_lines), attribute
+
+    def __init__(self, match):
+        self.children, self.attribute = match