axi/examples/text.py

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from __future__ import division
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import axi
import itertools
import string
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TEXT = (
'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor '
'incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis '
'nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. '
'Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu '
'fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in '
'culpa qui officia deserunt mollit anim id est laborum. '
)
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def word_wrap(text, width, measure_func):
result = []
for line in text.split('\n'):
fields = itertools.groupby(line, lambda x: x.isspace())
fields = [''.join(g) for _, g in fields]
if len(fields) % 2 == 1:
fields.append('')
x = ''
for a, b in zip(fields[::2], fields[1::2]):
w, _ = measure_func(x + a)
if w > width:
if x == '':
result.append(a)
continue
else:
result.append(x)
x = ''
x += a + b
if x != '':
result.append(x)
result = [x.strip() for x in result]
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return result
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class Font(object):
def __init__(self, font, point_size):
self.font = font
self.max_height = axi.Drawing(axi.text(string.printable, font)).height
# self.cap_height = axi.Drawing(axi.text('H', font)).height
height = point_size / 72
self.scale = height / self.max_height
def text(self, text):
d = axi.Drawing(axi.text(text, self.font))
d = d.scale(self.scale)
return d
def justify_text(self, text, width):
d = self.text(text)
w = d.width
spaces = text.count(' ')
if spaces == 0 or w >= width:
return d
e = ((width - w) / spaces) / self.scale
d = axi.Drawing(axi.text(text, self.font, extra=e))
d = d.scale(self.scale)
return d
def measure(self, text):
return self.text(text).size
def wrap(self, text, width, line_spacing=1, align=0, justify=False):
lines = word_wrap(text, width, self.measure)
ds = [self.text(line) for line in lines]
max_width = max(d.width for d in ds)
if justify:
jds = [self.justify_text(line, max_width) for line in lines]
ds = jds[:-1] + [ds[-1]]
spacing = line_spacing * self.max_height * self.scale
result = axi.Drawing()
y = 0
for d in ds:
if align == 0:
x = 0
elif align == 1:
x = max_width - d.width
else:
x = max_width / 2 - d.width / 2
result.add(d.translate(x, y))
y += spacing
return result
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def main():
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font = Font(axi.FUTURAL, 14)
d = font.wrap(TEXT, 11.5, 1.5, justify=True)
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d = d.center(12, 8.5)
d.render(bounds=axi.V3_BOUNDS).write_to_png('out.png')
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if __name__ == '__main__':
main()