Attempt to parse foundation breakpoints to compare them in pixels

parsing-foundation-breakpoint.py

"""
Attempt to parse breakpoints to compare them in pixels
"""

from collections import OrderedDict


base_font_size = 16
base_font_unit = "px"


def em_to_px(base, value):
    if value.endswith("em") or value.endswith("rem"):
        if value.endswith("em"):
            unitless_value = float(value[:-len("em")])
        elif value.endswith("rem"):
            unitless_value = float(value[:-len("rem")])

        return "{}px".format(unitless_value * base)

    return value


foundation_breakpoints = OrderedDict((
  ("small", "0"),
  ("medium", "640px"),
  ("large", "1024px"),
  ("xlarge", "1200px"),
  ("xxlarge", "1440px"),
))

print("Foundation $breakpoints")
print("-----------------------")

for name, value in foundation_breakpoints.items():
    print("{name} = {value}".format(name=name, value=value))

print()


sveetoy_breakpoints = OrderedDict((
    ("small-range", ("0em", "40em")),
    ("medium-range", ("40.063em", "63.9375em")),
    ("large-range", ("64em", "90em")),
    ("xlarge-range", ("90.063em", "120em")),
    ("xxlarge-range", ("120.063em",)),
))

print("Sveetoy $sv-breakpoints")
print("-----------------------")

for name, values in sveetoy_breakpoints.items():
    if len(values) == 1:
        sizes = [values[0], "infinite"]
    elif len(values) == 2:
        sizes = values
    else:
        print("Invalid item:", values, len(values))
        raise ValueError

    print("{name} = {value}".format(
        name=name,
        value=" to ".join(
            [em_to_px(base_font_size, i) for i in sizes]
        )
    ))

print()