refoundry.py

import math

import fontPens.marginPen
import fontTools.designspaceLib
import fontTools.feaLib.parser
import ufoLib2

DOT_BELOW_Y_MAX = -50


def x_center(bbox: ufoLib2.objects.misc.BoundingBox):
    width = bbox.xMax - bbox.xMin
    return round(bbox.xMin + width / 2)


def h_center(font, glyphname):
    if font.info.italicAngle:
        # extrapolate a lower center of h.
        slope = math.tan(math.radians(90 + font.info.italicAngle))
        # based on eyeballing, do about 40 y units
        italic_x_delta = round(40 / slope)
        marginpen = fontPens.marginPen.MarginPen(font, 0)
        font[glyphname].draw(marginpen)
        return (
            x_center(
                ufoLib2.objects.misc.BoundingBox(
                    marginpen.getMargins()[0], 0, marginpen.getMargins()[1], 0
                )
            )
            - italic_x_delta
        )
    return x_center(font[glyphname].getBounds(font.layers.defaultLayer))


def process_ufo(ufopath):
    font = ufoLib2.objects.Font.open(ufopath)
    # font.glyphOrder always returns a new list. so we must save a copy, modify it,
    # and add it back into the font.
    glyph_order = font.glyphOrder

    # create dotbelowcomb
    newg = font["dotaccentcomb"].copy("dotbelowcomb")
    newg.unicodes = [0x0323]
    y_delta = -(
        font["dotaccentcomb"].getBounds(font.layers.defaultLayer).yMax - DOT_BELOW_Y_MAX
    )
    newg.move((0, y_delta))
    assert len(font["dotaccentcomb"].anchors) == 1
    assert font["dotaccentcomb"].anchors[0].name == "_top"
    newg.anchors = [
        ufoLib2.objects.Anchor(
            x=font["dotaccentcomb"].anchors[0].x, y=0, name="_bottom"
        )
    ]
    font.addGlyph(newg)
    font.lib["public.postscriptNames"]["dotbelowcomb"] = "uni0323"
    # insert in glyph list _after_ dotaccentcomb
    glyph_order.insert(glyph_order.index("dotaccentcomb") + 1, "dotbelowcomb")

    # create hdotbelow
    x_delta = h_center(font, "h") - x_center(
        font["dotbelowcomb"].getBounds(font.layers.defaultLayer)
    )

    newg = ufoLib2.objects.Glyph(
        name="hdotbelow",
        unicodes=[0x1E25],
        width=font["h"].width,
        components=[
            ufoLib2.objects.Component(
                "dotbelowcomb",
                transformation=fontTools.misc.transform.Offset(x=x_delta, y=0),
            ),
            ufoLib2.objects.Component("h"),
        ],
    )
    font.addGlyph(newg)
    # insert in glyph list _before_ i
    glyph_order.insert(glyph_order.index("i"), "hdotbelow")

    # create Hdotbelow
    x_delta = h_center(font, "H") - x_center(
        font["dotbelowcomb"].getBounds(font.layers.defaultLayer)
    )
    newg = ufoLib2.objects.Glyph(
        name="Hdotbelow",
        unicodes=[0x1E24],
        width=font["H"].width,
        components=[
            ufoLib2.objects.Component(
                "dotbelowcomb",
                transformation=fontTools.misc.transform.Offset(x=x_delta, y=0),
            ),
            ufoLib2.objects.Component("H"),
        ],
    )
    font.addGlyph(newg)
    # insert in glyph list _before_ I
    glyph_order.insert(glyph_order.index("I"), "Hdotbelow")

    # create hdotbelow.sc
    x_delta = h_center(font, "h.sc") - x_center(
        font["dotbelowcomb"].getBounds(font.layers.defaultLayer)
    )
    newg = ufoLib2.objects.Glyph(
        name="hdotbelow.sc",
        width=font["h.sc"].width,
        components=[
            ufoLib2.objects.Component(
                "dotbelowcomb",
                transformation=fontTools.misc.transform.Offset(x=x_delta, y=0),
            ),
            ufoLib2.objects.Component("h.sc"),
        ],
    )
    font.addGlyph(newg)
    # insert in glyph list _before_ i.sc
    glyph_order.insert(glyph_order.index("i.sc"), "hdotbelow.sc")

    # create uni02BC (modifier letter apostrophe)
    newg = ufoLib2.objects.Glyph(
        name="uni02BC",
        unicodes=[0x02BC],
        width=font["quoteright"].width,
        components=[ufoLib2.objects.Component("quoteright")],
    )
    font.addGlyph(newg)
    # insert in glyph list _after_ quotesingle
    glyph_order.insert(glyph_order.index("quotesingle") + 1, "uni02BC")

    equivs = [
        ("h", "hdotbelow"),
        ("H", "Hdotbelow"),
        ("h.sc", "hdotbelow.sc"),
    ]
    # add hdotbelow, Hdotbelow, and hdotbelow.sc to groups
    for group in font.groups.values():
        for find, add in equivs:
            if find in group:
                group.append(add)
                group.sort()

    # there are no kerning pairs in font.kerning involving these glyphs
    for kern_pair in font.kerning:
        for find, add in equivs:
            assert kern_pair[0] != find
            assert kern_pair[1] != find

    # update font family name
    font.info.familyName += " Straylight"
    font.info.styleMapFamilyName += " Straylight"

    font.glyphOrder = glyph_order

    font.save(overwrite=True)


def process_designspace(dspath):
    dsd = fontTools.designspaceLib.DesignSpaceDocument.fromfile(dspath)
    for source in dsd.sources:
        process_ufo(source.path)
    rawxml = open(dspath).read()
    modified = rawxml.replace("Ibarra Real Nova", "Ibarra Real Nova Straylight")
    with open(dspath, mode="w") as dsfile:
        dsfile.write(modified)


def main():
  process_designspace("./ibarrareal/sources/IbarraRealNova.designspace")

  
if __name__ == "__main__":
    main()