Sync Anchors

syncAnchors.py

from mojo.subscriber import Subscriber, registerGlyphEditorSubscriber, disableSubscriberEvents

'''
A startup script to help keep anchors in-sync across glyphs
The script will not append anchors, only move existing anchors
To set a linked glyph, add 'LinkedGlyphs:' in your main glyph's .note
On that same line add a comma separated list of glyph names (no spaces)
Adding a ! after a glyph name with a semicolon separated list will add 
an exception and only those anchors will be moved
e.g.
glyph == "O"
LinkedGlyphs:Oslash,Ohorn!top;bottom
                         ^ this will ignore
                          all anchors but these 
'''


LINKED_KEY = 'LinkedGlyphs'
ANCHOR_COLOR = (0.502, 0.0015, 0.9985, 1.0)


class sinkAnchors(Subscriber):

    debug = True

    def glyphEditorGlyphDidChangeContours(self, info):
        glyph = info["glyph"]
        with disableSubscriberEvents():
            if glyph:
                baseAnchors = glyph.anchors
                glyphs = self.getGlyphs(glyph)
                if glyphs != []: 
                    for gs in glyphs:
                        exception = [a.name for a in glyph.anchors]
                        e = gs.split("!")
                        if len(e) > 1:
                            exception = e[1].split(";")
                        gs = gs.split("!")[0]
                        if gs in self.font.keys() and gs != glyph.name:
                            for a in glyph.anchors:
                                if a.name in exception:
                                    if self.getAnchorMap(self.font[gs]).get(a.name):
                                        oa = self.getAnchorMap(self.font[gs])[a.name]
                                        oa.position = a.position
                                        oa.color = ANCHOR_COLOR


    def getGlyphs(self, glyph):
        # function partially stolen from ContoursLock by Thom Janssen
        note = glyph.note
        splitNote = note.split('\n')
        if note:
            linkedGlyphs = []
            try:
                for line in range(len(splitNote)):
                    if LINKED_KEY in splitNote[line]:
                        for i in splitNote[line].split(':')[1].split(','):
                            linkedGlyphs.append(i)
            except:
                pass
        else:
            linkedGlyphs = []
        return linkedGlyphs


    def getAnchorMap(glyph):
        anchorMap = {a.name:a for a in glyph.anchors}
        return anchorMap


registerGlyphEditorSubscriber(sinkAnchors)