Robofont: move selection around contour

glyph_move_selection_backward.py

from importlib import reload
import glyph_move_selection_forward
reload(glyph_move_selection_forward)

g = CurrentGlyph()
glyph_move_selection_forward.move_index(g, -1)

glyph_move_selection_forward.py

def single_next_index(contour, index, direction):
    next_index = (index + direction) % len(contour.points)
    if contour.points[next_index].type == 'offcurve':
        next_index = single_next_index(contour, next_index, direction)
    return next_index


def get_next_index(current_selection_index, direction):
    new_selection_index = []
    for contour, index in current_selection_index:
        if contour.clockwise:
            direction = direction * -1
        next_index = single_next_index(contour, index, direction)
        new_selection_index.append((contour, next_index))
    return new_selection_index


def move_index(g, direction=1):
    current_selection_index = [
        (pt.contour, pt.index) for pt in g.selectedPoints]
    g.deselect()

    for contour, sel_index in get_next_index(
        current_selection_index, direction
    ):
        contour.points[sel_index].selected = True


if __name__ == '__main__':
    g = CurrentGlyph()
    move_index(g, 1)