adds Glyphs script for fixing up variant glyphs

misc/rf-scripts/fixup-variant.py

@@ -0,0 +1,55 @@
+# Helper for making variants of a glyph.
+# 
+# e.g. we have 10 glyphs based on "I" and we now want to
+# create an alternate "I" called "I.1".
+# 
+# 1. We first make our I.1 manually
+# 2. Next we generate all other glyphs:
+#      Idieresisacute=Idieresisacute.1
+#      Istroke=Istroke.1
+#      Itildebelow=Itildebelow.1
+#      Igrave=Igrave.1
+#      Iacute=Iacute.1
+#      Icircumflex=Icircumflex.1
+#      Itilde=Itilde.1
+#      Imacron=Imacron.1
+#      Ibreve=Ibreve.1
+#      Iogonek=Iogonek.1
+#    Which we paset into the "create glyphs" window
+# 3. We now have 10 new glyphs.
+# 4. Select all those new glyphs
+# 5. Open the macro window
+# 6. Paste this script and modify `prevcn` and `newcn`
+# 7. Run it
+# 
+prevcn = "I"   # component to find and replace
+newcn = "I.1"  # replacement component
+
+font = Glyphs.font
+font.disableUpdateInterface()
+try:
+  for layer in font.selectedLayers:
+    g = None
+    if isinstance(layer, GSGlyph):
+      g = layer
+    else:
+      g = layer.parent
+    print(g)
+    g.beginUndo()
+    try:
+      for master in font.masters:
+        layer = g.layers[master.id]
+        print(layer)
+        if len(layer.components) != 1:
+          print("not a single component %s" % layer)
+          continue
+        layer.components[0].decompose()
+        for c in layer.components:
+          if c.name == prevcn:
+            print("replace %s with %s" % (prevcn, newcn))
+            c.name = newcn
+    finally:
+      g.endUndo()
+finally:
+  font.enableUpdateInterface()
+