Fix Bug 412754: Elliptical arc commands must have comma or whitespace separating

scour.py

@@ -1759,16 +1759,18 @@ def serializePath(pathObj):
 	pathStr = ""
 	for (cmd,data) in pathObj:
 		pathStr += cmd
-		pathStr += scourCoordinates(data)
+		# elliptical arc commands must have comma/wsp separating the coordinates
+		# this fixes an issue outlined in Fix https://bugs.launchpad.net/scour/+bug/412754
+		pathStr += scourCoordinates(data, (cmd == 'a'))
 	return pathStr
 
-def scourCoordinates(data):
+def scourCoordinates(data, forceCommaWsp = False):
 	"""
 		Serializes coordinate data with some cleanups:
 			- removes all trailing zeros after the decimal
 			- integerize coordinates if possible
 			- removes extraneous whitespace
-			- adds commas between values in a subcommand if required
+			- adds commas between values in a subcommand if required (or if forceCommaWsp is True)
 	"""
 	coordsStr = ""
 	if data != None:
@@ -1777,8 +1779,8 @@ def scourCoordinates(data):
 			# add the scoured coordinate to the path string
 			coordsStr += scourLength(coord)
 			
-			# only need the comma if the next number is non-negative
+			# only need the comma if the next number is non-negative or if forceCommaWsp is True
-			if c < len(data)-1 and Decimal(data[c+1]) >= 0:
+			if c < len(data)-1 and (forceCommaWsp or Decimal(data[c+1]) >= 0):
 				coordsStr += ','
 			c += 1
 	return coordsStr

testscour.py

@@ -892,6 +892,12 @@ class PropagateCommonAttributesUp(unittest.TestCase):
 		g = scour.scourXmlFile('unittests/move-common-attributes-to-grandparent.svg').getElementsByTagNameNS(SVGNS, 'g')[0]
 		self.assertEquals( g.getAttribute('fill'), '#0F0',
 			'Did not move common fill attribute to grandparent')
+			
+class PathEllipticalArcParsingCommaWsp(unittest.TestCase):
+	def runTest(self):
+		p = scour.scourXmlFile('unittests/path-elliptical-arc-parsing.svg').getElementsByTagNameNS(SVGNS, 'path')[0]
+		self.assertEquals( p.getAttribute('d'), 'M100,100a100,100,0,1,1,-50,100z',
+			'Did not parse elliptical arc command properly')
 		
 # TODO; write a test for embedding rasters
 # TODO: write a test for --disable-embed-rasters

unittests/path-elliptical-arc-parsing.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
+  <path d="M100,100a100,100,0,1,1,-50,100z" fill="red" />
+</svg>