def test_convert01(self):
# with context
parser = SVGParser()
root = parser.create_element('svg')
group = root.create_sub_element('g')
group.attributes.update({
'font-family': 'DejaVu Sans, sans-serif',
'font-size': '16',
})
# 1(rem) = 16(px)
text = group.create_sub_element('text')
a = SVGLength('1in', context=text)
self.assertEqual('in', a.unit)
self.assertEqual('1in', a.tostring())
a.convert(SVGLength.TYPE_CM) # 1(in) = 2.54(cm)
self.assertEqual('cm', a.unit)
self.assertEqual('2.54cm', a.tostring())
a.convert(SVGLength.TYPE_PX) # 2.54(cm) = 96(px)
self.assertEqual('px', a.unit)
self.assertEqual('96px', a.tostring())
a.convert(SVGLength.TYPE_NUMBER) # 96(px) = 96
self.assertIsNone(a.unit)
self.assertEqual('96', a.tostring())
a.convert(SVGLength.TYPE_MM) # 96(px) = 25.4(mm)
self.assertEqual('mm', a.unit)
self.assertEqual('25.4mm', a.tostring())
# 100(%) = 16(px)
a.convert(SVGLength.TYPE_PERCENTAGE) # 96(px) = 600(%)
self.assertEqual('%', a.unit)
self.assertEqual('600%', a.tostring())
# 100(%) = 1(em)
a.convert(SVGLength.TYPE_EMS) # 600(%) = 6(em)
self.assertEqual('em', a.unit)
self.assertEqual('6em', a.tostring())
# 1(ex) = x-height(px)
# 96(px) -> x-height: 53(px)
# 96(px) / 53(px) = 1.8113...
a.convert(SVGLength.TYPE_EXS)
self.assertEqual('ex', a.unit)
self.assertEqual('1.811ex', a.tostring())
# font-family: "DejaVu Sans", sans-serif
# element font size: 16(px) -> 1(ex) = 9(px)
# 1.8113(ex) = 1.8113 * 9 = 16.3017...(px)
# 1(px) = 0.75(pt)
# 16.3017 * 0.75 = 12.2263...(pt)
a.convert(SVGLength.TYPE_PT)
self.assertEqual('pt', a.unit)
self.assertEqual('12.226pt', a.tostring())
# 1(pt) = 1 / 12(pc)
# 12.2263(pt) = 1.0189...(pc)
a.convert(SVGLength.TYPE_PC)
self.assertEqual('pc', a.unit)
self.assertEqual('1.019pc', a.tostring())
def test_convert03(self):
# without context
Font.default_font_size = 20
a = SVGLength('1em')
self.assertEqual('em', a.unit)
self.assertEqual('1em', a.tostring())
# 1(em) = 2(ex)
a.convert(SVGLength.TYPE_EXS)
self.assertEqual('ex', a.unit)
self.assertEqual('2ex', a.tostring())
# 1(em) = default font size(px)
a.convert(SVGLength.TYPE_PX)
self.assertEqual('px', a.unit)
self.assertEqual('20px', a.tostring())
# 1(rem) = default font size(px)
a.convert(SVGLength.TYPE_REMS)
self.assertEqual('rem', a.unit)
self.assertEqual('1rem', a.tostring())
# 1(ch) = default font size / 2(px)
a.convert(SVGLength.TYPE_CHS)
self.assertEqual('ch', a.unit)
self.assertEqual('2ch', a.tostring())
# 100(%) = default font size(px)
a.convert(SVGLength.TYPE_PERCENTAGE)
self.assertEqual('%', a.unit)
self.assertEqual('100%', a.tostring())
# 1(ex) = 0.5(em)
a = SVGLength('1ex')
a.convert(SVGLength.TYPE_EMS)
self.assertEqual('em', a.unit)
self.assertEqual('0.5em', a.tostring())
