from fontTools.pens.basePen import BasePen
from reportlab.graphics.shapes import Path


__all__ = ["ReportLabPen"]


class ReportLabPen(BasePen):

    """A pen for drawing onto a ``reportlab.graphics.shapes.Path`` object."""

    def __init__(self, glyphSet, path=None):
        BasePen.__init__(self, glyphSet)
        if path is None:
            path = Path()
        self.path = path

    def _moveTo(self, p):
        (x, y) = p
        self.path.moveTo(x, y)

    def _lineTo(self, p):
        (x, y) = p
        self.path.lineTo(x, y)

    def _curveToOne(self, p1, p2, p3):
        (x1, y1) = p1
        (x2, y2) = p2
        (x3, y3) = p3
        self.path.curveTo(x1, y1, x2, y2, x3, y3)

    def _closePath(self):
        self.path.closePath()


if __name__ == "__main__":
    import sys

    if len(sys.argv) < 3:
        print(
            "Usage: reportLabPen.py <OTF/TTF font> <glyphname> [<image file to create>]"
        )
        print(
            "  If no image file name is created, by default <glyphname>.png is created."
        )
        print("  example: reportLabPen.py Arial.TTF R test.png")
        print(
            "  (The file format will be PNG, regardless of the image file name supplied)"
        )
        sys.exit(0)

    from fontTools.ttLib import TTFont
    from reportlab.lib import colors

    path = sys.argv[1]
    glyphName = sys.argv[2]
    if len(sys.argv) > 3:
        imageFile = sys.argv[3]
    else:
        imageFile = "%s.png" % glyphName

    font = TTFont(path)  # it would work just as well with fontTools.t1Lib.T1Font
    gs = font.getGlyphSet()
    pen = ReportLabPen(gs, Path(fillColor=colors.red, strokeWidth=5))
    g = gs[glyphName]
    g.draw(pen)

    w, h = g.width, 1000
    from reportlab.graphics import renderPM
    from reportlab.graphics.shapes import Group, Drawing, scale

    # Everything is wrapped in a group to allow transformations.
    g = Group(pen.path)
    g.translate(0, 200)
    g.scale(0.3, 0.3)

    d = Drawing(w, h)
    d.add(g)

    renderPM.drawToFile(d, imageFile, fmt="PNG")
