Add support for elidedFallbackName

Add a setter and getter for the doc.elidedFallbackName.
This is already part of the DS5 work in fonttools.
The name is added as attribute of the <axes> tag.
doc.elidedFallbackName = None removes the name from the designspace

Author: LettError

Lib/ufoProcessor/ufoOperator.py

@@ -424,6 +424,14 @@ def locationLabels(self, locationLabels):
     def variableFonts(self):
         return self.doc.variableFonts
 
+    @property
+    def elidedFallbackName(self):
+        return self.doc.elidedFallbackName
+
+    @elidedFallbackName.setter
+    def elidedFallbackName(self, name):
+        self.doc.elidedFallbackName = name
+
     @property
     def writerClass(self):
         return self.doc.writerClass
@@ -448,7 +456,7 @@ def loadFonts(self, reload=False):
             # we have a logger before proceding.
             self.startLog()
         # check excluded glyphs and muted glyphs when making this list
-        self.glyphNames = list({glyphname for font in self.fonts.values() for glyphname in font.keys()})
+        self.glyphNames = list({glyphname for font in self.fonts.values() for glyphname in font.keys() if font is not None})
         if self._fontsLoaded and not reload:
             if self.debug:
                 self.logger.info("\t\t-- loadFonts called, but fonts are loaded already and no reload requested")
@@ -2031,3 +2039,15 @@ def _copyFontInfo(self, sourceInfo, targetInfo):
     doc.includeGlyph("glyphOne")
     print(doc.reportExcludedGlyphs())
     print(doc.lib)
+
+    # expose the doc elidedFallbackName
+    # add the elidedFallbackName attribute to the
+    # axes tag
+    print(doc.elidedFallbackName)
+    # this removes the attribute
+    doc.elidedFallbackName = None
+    # this sets the attribute
+    doc.elidedFallbackName = "Regular"
+    print(doc.elidedFallbackName)
+    doc.write(ds5Path)
+    print('ds5Path', ds5Path)

Tests/ds5/ds5.designspace

@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <designspace format="5.0">
-  <axes>
+  <axes elidedfallbackname="Regular">
     <axis tag="wdth" name="width" minimum="400" maximum="1000" default="400">
       <map input="400" output="400"/>
       <map input="700" output="900"/>