return to the previous CurrentGlyph rf4

previousCurrentGlyph.py

from mojo.subscriber import Subscriber, registerRoboFontSubscriber
from mojo.UI import SetCurrentGlyphByName

'''
keep track of the most recent currentGlyph and return to it using ⇧+,

recent update:
no longer tied to the edit glyph window - you can now close a glyph, open a new glyph, and then ⇧+, back to the previous glyph
'''

class previousCurrentGlyph(Subscriber):

    debug = False

    def build(self):
        self.previousGlyph = [None, None]

    def glyphEditorDidSetGlyph(self, info):
        glyph = info['glyph']
        if glyph is None:
            return
        if glyph.name != self.previousGlyph[1]:
            self.previousGlyph = [self.previousGlyph[1], glyph.name]

    def glyphEditorDidKeyDown(self, info):
        deviceState = info['iterations'][0]['deviceState']
        keyDown = deviceState['keyDown']
        shiftDown = deviceState['shiftDown']
        if keyDown == '<' and shiftDown != 0 and self.previousGlyph[0] != None:
            SetCurrentGlyphByName(self.previousGlyph[0])

registerRoboFontSubscriber(previousCurrentGlyph)