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ochoadavid/html_to_canvas.py

Last active October 11, 2021 11:16
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Jupyter notebook with Latex to Canvas html equation converter
Raw
html_to_canvas.py
import urllib.parse as parse
import sys
infile = sys.argv[1]
def to_canvas(latex, inline = False):
'''Converts Latex expression to canvas used <img> class.'''
modelo = '<img class="equation_image" title="{0}" src="/equation_images/{1}" alt="Latex: {0}" data-equation-content="{0}" />'
out = modelo.format(latex.replace('&amp;','&'),parse.quote(parse.quote(latex.replace('&amp;','&'), safe='()'), safe='()&'))
if not inline:
out = '</p>' + out + '</p>'
return out
with open(infile) as f:
start = 0
for line in f:
if start == 0:
if 'script' in line:
start = 1
else:
print(line)
elif start == 1:
if '<body>' in line:
print('</head>')
start = 2
elif start == 2:
if '<img src=' in line:
print(line)
elif '$$' in line:
chunks = line.split('$$')
for i, ch in enumerate(chunks):
if i % 2 == 0:
print(ch)
else:
print(to_canvas(ch))
elif '$' in line:
chunks = line.split('$')
for i, ch in enumerate(chunks):
if i % 2 == 0:
print(ch)
else:
print(to_canvas(ch, inline=True))
else:
print(line)
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