Prevent fonts from being removed inside a <defs>

scour.py

@@ -215,12 +215,13 @@ def removeUnreferencedIDs(referencedIDs, identifiedElements):
 # returns the number of unreferenced children removed from defs elements
 def vacuumDefs(doc):
 	global numElemsRemoved
+	keepTags = ['font', 'style', 'metadata' ]
 	num = 0
 	defs = doc.documentElement.getElementsByTagNameNS(NS['SVG'], 'defs')
 	for aDef in defs:
 		elemsToRemove = []
 		for elem in aDef.childNodes:
-			if elem.nodeType == 1 and elem.getAttribute('id') == '' :
+			if elem.nodeType == 1 and elem.getAttribute('id') == '' and not elem.nodeName in keepTags:
 				elemsToRemove.append(elem)
 		for elem in elemsToRemove:
 			aDef.removeChild(elem)

testscour.py

@@ -195,6 +195,19 @@ class NoInkscapeAttributes(unittest.TestCase):
 			findInkscapeAttr), False,
 			'Found Inkscape attributes' )
 
+class KeepReferencedFonts(unittest.TestCase):
+	def runTest(self):
+		doc = scour.scourXmlFile('unittests/referenced-font.svg')
+		fonts = doc.documentElement.getElementsByTagNameNS('http://www.w3.org/2000/svg','font')
+		self.assertEquals(len(fonts), 1,
+			"Font wrongly removed from <defs>" )
+
+class RemoveUnreferencedFonts(unittest.TestCase):
+	def runTest(self):
+		doc = scour.scourXmlFile('unittests/unreferenced-font.svg')
+		fonts = doc.documentElement.getElementsByTagNameNS('http://www.w3.org/2000/svg','font')
+		self.assertEquals(len(fonts), 0,
+			"Font was not removed from <defs>" )
 		
 if __name__ == '__main__':
     unittest.main()

unittests/referenced-font.svg

@@ -0,0 +1,16 @@
+<svg xmlns='http://www.w3.org/2000/svg'>
+  <defs>
+    <font id="Font1" horiz-adv-x="1000">
+      <font-face font-family="Super Sans" font-weight="bold" font-style="normal"
+          units-per-em="1000" cap-height="600" x-height="400"
+          ascent="700" descent="300"
+          alphabetic="0" mathematical="350" ideographic="400" hanging="500">
+        <font-face-src>
+          <font-face-name name="Super Sans Bold"/>
+        </font-face-src>
+      </font-face>
+      <missing-glyph><path d="M0,0h200v200h-200z"/></missing-glyph>
+    </font>
+  </defs>
+  <text x="100" y="100" style="font-family: 'Super Sans', Helvetica, sans-serif">Text</text>
+</svg>

unittests/unreferenced-font.svg

@@ -0,0 +1,16 @@
+<svg xmlns='http://www.w3.org/2000/svg'>
+  <defs>
+    <font id="Font1" horiz-adv-x="1000">
+      <font-face font-family="Super Sans" font-weight="bold" font-style="normal"
+          units-per-em="1000" cap-height="600" x-height="400"
+          ascent="700" descent="300"
+          alphabetic="0" mathematical="350" ideographic="400" hanging="500">
+        <font-face-src>
+          <font-face-name name="Super Sans Bold"/>
+        </font-face-src>
+      </font-face>
+      <missing-glyph><path d="M0,0h200v200h-200z"/></missing-glyph>
+    </font>
+  </defs>
+  <text x="100" y="100" style="font-family: Helvetica, sans-serif">Text</text>
+</svg>