components in background

[schriftgestalt]

I have a .glyphs file that has a component in the background. It points to the same glyph. So you see whatever is in the foreground. When exporting that font with fontmake, defcon is trapped in a recursion.

I hope that I have the latest version of all libs

  File "/usr/local/bin/fontmake", line 11, in <module>
    sys.exit(main())
  File "/Library/Python/2.7/site-packages/fontmake/__main__.py", line 258, in main
    project.run_from_glyphs(glyphs_path, **args)
  File "/Library/Python/2.7/site-packages/fontmake/font_project.py", line 560, in run_from_glyphs
    mti_source=mti_source)
  File "/Library/Python/2.7/site-packages/fontTools/misc/loggingTools.py", line 372, in wrapper
    return func(*args, **kwds)
  File "/Library/Python/2.7/site-packages/fontmake/font_project.py", line 131, in build_master_ufos
    font, family_name=family_name, instance_dir=instance_dir)
  File "/Library/Python/2.7/site-packages/glyphsLib/builder/__init__.py", line 104, in to_designspace
    return builder.designspace
  File "/Library/Python/2.7/site-packages/glyphsLib/builder/builders.py", line 210, in designspace
    list(self.masters)  # Make sure that the UFOs are built
  File "/Library/Python/2.7/site-packages/glyphsLib/builder/builders.py", line 157, in masters
    self.to_ufo_glyph(ufo_glyph, layer, glyph)
  File "/Library/Python/2.7/site-packages/glyphsLib/builder/glyph.py", line 116, in to_ufo_glyph
    self.to_ufo_glyph_background(ufo_glyph, layer)
  File "/Library/Python/2.7/site-packages/glyphsLib/builder/glyph.py", line 253, in to_ufo_glyph_background
    self.to_ufo_components(new_glyph, background)
  File "/Library/Python/2.7/site-packages/glyphsLib/builder/components.py", line 28, in to_ufo_components
    pen.addComponent(component.name, component.transform)
  File "/Library/Python/2.7/site-packages/defcon/pens/glyphObjectPointPen.py", line 37, in addComponent
    self._glyph.appendComponent(component)
  File "/Library/Python/2.7/site-packages/defcon/objects/glyph.py", line 708, in appendComponent
    self.insertComponent(len(self._components), component)
  File "/Library/Python/2.7/site-packages/defcon/objects/glyph.py", line 732, in insertComponent
    self.postNotification(notification="Glyph.ComponentsChanged")
  File "/Library/Python/2.7/site-packages/defcon/objects/base.py", line 223, in postNotification
    dispatcher.postNotification(notification=notification, observable=self, data=data)
  File "/Library/Python/2.7/site-packages/defcon/tools/notifications.py", line 201, in postNotification
    callback(notificationObj)
  File "/Library/Python/2.7/site-packages/defcon/objects/component.py", line 385, in baseGlyphDataChangedNotificationCallback
    self.postNotification("Component.BaseGlyphDataChanged")
  File "/Library/Python/2.7/site-packages/defcon/objects/base.py", line 223, in postNotification
    dispatcher.postNotification(notification=notification, observable=self, data=data)
  File "/Library/Python/2.7/site-packages/defcon/tools/notifications.py", line 201, in postNotification
    callback(notificationObj)
  File "/Library/Python/2.7/site-packages/defcon/objects/glyph.py", line 1299, in _componentBaseGlyphDataChanged
    self.postNotification(notification="Glyph.ComponentsChanged")
  File "/Library/Python/2.7/site-packages/defcon/objects/base.py", line 223, in postNotification
    dispatcher.postNotification(notification=notification, observable=self, data=data)
  File "/Library/Python/2.7/site-packages/defcon/tools/notifications.py", line 201, in postNotification
    callback(notificationObj)
  File "/Library/Python/2.7/site-packages/defcon/objects/component.py", line 385, in baseGlyphDataChangedNotificationCallback
    self.postNotification("Component.BaseGlyphDataChanged")
  File "/Library/Python/2.7/site-packages/defcon/objects/base.py", line 223, in postNotification
    dispatcher.postNotification(notification=notification, observable=self, data=data)
  File "/Library/Python/2.7/site-packages/defcon/tools/notifications.py", line 201, in postNotification
    callback(notificationObj)
  File "/Library/Python/2.7/site-packages/defcon/objects/glyph.py", line 1299, in _componentBaseGlyphDataChanged
    self.postNotification(notification="Glyph.ComponentsChanged")
  File "/Library/Python/2.7/site-packages/defcon/objects/base.py", line 223, in postNotification
    dispatcher.postNotification(notification=notification, observable=self, data=data)
  File "/Library/Python/2.7/site-packages/defcon/tools/notifications.py", line 201, in postNotification
    callback(notificationObj)
...

`` 

[madig]

This problem I think: #375

Might be a limitation of the UFO format or how it's interpreted. Discussion at unified-font-object/ufo-spec#49.