bbb: Add parse method for the pan zoom events file

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

bbb.py

@@ -16,6 +16,8 @@ __all__ = [
 	'SlideRef',
 	'parse_deskshare_xml',
 	'parse_shapes_svg',
+	'PanZoomEvent',
+	'parse_panzooms_xml',
 ]
 
 
@@ -82,3 +84,20 @@ def parse_shapes_svg(filename):
 		))
 
 	return rv
+
+
+PanZoomEvent = namedtuple('PanZoomEvent', 'ts x y w h')
+
+def parse_panzooms_xml(filename):
+	rv = []
+	xml_doc = lxml.etree.parse(filename)
+	for element in xml_doc.xpath("//recording/event"):
+		x, y, w, h = [float(x) for x in element.getchildren()[0].text.split()]
+		rv.append(PanZoomEvent(
+			float(element.get("timestamp")),
+			x,
+			y,
+			w,
+			h,
+		))
+	return rv