create magic file of font type list(type.mgk) for GraphicsMagick.

mgkgen.py

#
# about
# -----
# create magic file of font type list(type.mgk) for GraphicsMagick.
# use only on macOS.
#
# output file format
# ------------------
#
# <?xml version="1.0"?>
# <typemap>
#   <type
#     name="Arial"
#     fullname="Arial"
#     family="Arial"
#     weight="400"
#     style="normal"
#     stretch="normal"
#     glyphs="/Library/Fonts/Arial.ttf"
#     />
# </typemap>
#
# usage
# -----
#
#   (If Language Setting is not English in System Preference, please set it to English.)
#   $ system_profiler -xml SPFontsDataType > fontset.xml
#   $ python mgkgen fontset.xml > type.mgk
#      copy to Your GraphicsMagick config path
#   ex.)
#   $ cp type.mgk /usr/local/Cellar/graphicsmagick/1.3.25/lib/GraphicsMagick/config/
#
import copy
import sys
from subprocess import Popen, PIPE
import xml.etree.ElementTree as etree
from xml.etree.ElementTree import Element, SubElement
import xml.dom.minidom as minidom

WEIGHT_DEFAULT = 400
WEIGHT_STRING_SET = {
    'Extrabold': 800,
    'Extra Bold': 800,
    'Bold': 700,
    'Demi': 600,    # high priority
    'Regular': 400,
    'Light': 300,
    'Extralight': 200,
    'Extra Light': 200,
}
STYLE_DEFAULT = "normal"
STYLE_STRING_SET = {
    'Oblique': 'oblique',
    'Italic': 'italic',
}


def get_style(line):
    # from fullname text
    tmp = line.split()
    for s, style in STYLE_STRING_SET.items():
        if s in tmp:
            return style
    return STYLE_DEFAULT


def get_weight(line):
    # from style text
    if 'demi' in line.lower():
        return WEIGHT_STRING_SET['Demi']
    for k, weight in WEIGHT_STRING_SET.items():
        if k in line.lower():
            return weight
    return WEIGHT_DEFAULT


def main():
    xmlstr = ""
    if len(sys.argv) == 1:
        # from system_profiler
        with Popen(["system_profiler", "-xml", "SPFontsDataType"], stdout=PIPE) as proc:
            xmlstr = proc.stdout.read()
    else:
        xmlstr = open(sys.argv[1]).read()
    root = etree.fromstring(xmlstr)

    result = []
    for elm in root.findall("./array/dict/array/dict"):
        # find glyphs
        d = {"stretch": "normal"}   # NOTE: stretch is only 'normal'
        found_path = False
        for child in elm.getchildren():
            if found_path:
                d["glyphs"] = child.text
                found_path = False

            # find key
            if child.tag == "key":
                if child.text == "path":
                    found_path = True

        # find name, fullname, family, style
        for elm in elm.findall("./array/dict"):
            dd = copy.copy(d)
            found_name = False
            found_family = False
            found_fullname = False
            found_style = False
            for child in elm.getchildren():
                if found_name:
                    dd["name"] = child.text
                    found_name = False
                elif found_family:
                    dd["family"] = child.text
                    found_family = False
                elif found_fullname:
                    dd["fullname"] = child.text
                    found_fullname = False
                elif found_style:
                    dd["style"] = child.text
                    found_style = False
                # find key
                if child.tag == "key":
                    if child.text == "_name":
                        found_name = True
                    elif child.text == "family":
                        found_family = True
                    elif child.text == "fullname":
                        found_fullname = True
                    elif child.text == "style":
                        found_style = True
            # fix style and weight
            dd["weight"] = str(get_weight(dd["style"]))
            dd["style"] = get_style(dd["fullname"])
            result.append(dd)

    top = Element("typemap")
    for r in result:
        child = SubElement(top, "type", r)
    print(minidom.parseString(etree.tostring(top, "utf-8")).toprettyxml())


if __name__ == '__main__':
    main()