bbb: Use namedtuples for the parsed values

Makes this a bit more readable rather than raw tuples

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

bbb.py

@@ -10,23 +10,29 @@
 #
 
 __all__ = [
+	'CursorEvent',
 	'parse_cursor_xml',
+	'PresentEvent',
+	'SlideRef',
 	'parse_deskshare_xml',
 	'parse_shapes_svg',
 ]
 
 
 import re
+from collections import namedtuple
 
 import lxml.etree
 
 
+CursorEvent = namedtuple('CursorEvent', 'ts x y')
+
 def parse_cursor_xml(filename):
 	rv = []
 	xml_doc = lxml.etree.parse(filename)
 	for element in xml_doc.xpath("//recording/event"):
 		px, py = [float(x) for x in element.getchildren()[0].text.split()]
-		rv.append((
+		rv.append(CursorEvent(
 			float(element.get("timestamp")),
 			px,
 			py,
@@ -34,13 +40,16 @@ def parse_cursor_xml(filename):
 	return rv
 
 
+PresentEvent = namedtuple('CursorEvent', 'ts_in ts_out slide')
+SlideRef = namedtuple('SlideRef', 'deck_id page')
+
 def parse_deskshare_xml(filename):
 	rv = []
 	xml_doc = lxml.etree.parse(filename)
 	for element in xml_doc.xpath("//recording/event"):
 		st = float(element.get("start_timestamp"))
 		et = float(element.get("stop_timestamp"))
-		rv.append( (st, et, None) )
+		rv.append( PresentEvent(st, et, None) )
 	return rv
 
 
@@ -63,10 +72,10 @@ def parse_shapes_svg(filename):
 			m = re.match('^presentation/([0-9a-fA-F]{40,64}-[0-9]+)/slide-([0-9]+).png$', href)
 			if not m:
 				raise RuntimeError('Invalid presentation page link')
-			slide = (m.group(1), int(m.group(2)))
+			slide = SlideRef(m.group(1), int(m.group(2)))
 
 		# Append
-		rv.append((
+		rv.append(PresentEvent(
 			float(element.get('in')),
 			float(element.get('out')),
 			slide