def tex_to_svg_file(tex_file_content):
svg_file = os.path.join(
get_tex_dir(), tex_hash(tex_file_content) + ".svg"
)
if not os.path.exists(svg_file):
# If svg doesn't exist, create it
tex_to_svg(tex_file_content, svg_file)
return svg_file
def generate_tex_file(expression, template_tex_file_body):
result = os.path.join(
get_tex_dir(), tex_hash(expression, template_tex_file_body)) + ".tex"
if not os.path.exists(result):
print("Writing \"%s\" to %s" % ("".join(expression), result))
new_body = template_tex_file_body.replace(TEX_TEXT_TO_REPLACE,
expression)
with open(result, "w", encoding="utf-8") as outfile:
outfile.write(new_body)
return result
def tex_to_dvi(tex_file):
result = tex_file.replace(".tex", ".dvi" if not TEX_USE_CTEX else ".xdv")
if not os.path.exists(result):
commands = [
"latex", "-interaction=batchmode", "-halt-on-error",
"-output-directory=\"{}\"".format(
get_tex_dir()), "\"{}\"".format(tex_file), ">", os.devnull
] if not TEX_USE_CTEX else [
"xelatex", "-no-pdf", "-interaction=batchmode", "-halt-on-error",
"-output-directory=\"{}\"".format(
get_tex_dir()), "\"{}\"".format(tex_file), ">", os.devnull
]
exit_code = os.system(" ".join(commands))
if exit_code != 0:
log_file = tex_file.replace(".tex", ".log")
raise Exception(
("Latex error converting to dvi. " if not TEX_USE_CTEX else
"Xelatex error converting to xdv. ") +
"See log output above or the log file: %s" % log_file)
return result
def tex_to_svg_file(*args):
if len(args) == 1:
tex_file_content = args[0]
svg_file = os.path.join(get_tex_dir(),
tex_hash(tex_file_content) + ".svg")
if not os.path.exists(svg_file):
# If svg doesn't exist, create it
tex_to_svg(tex_file_content, svg_file)
return svg_file
else:
expression, template_tex_file_body = args
tex_file = generate_tex_file(expression, template_tex_file_body)
dvi_file = tex_to_dvi(tex_file)
return dvi_to_svg(dvi_file)