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#!/usr/bin/env python
# coding=utf-8
#
# Copyright (C) 2019 Marc Jeanmougin
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
"""
Generate Latex via a PDF using pdflatex
"""
import os
import inkex
from inkex.base import TempDirMixin
from inkex.command import call, inkscape
from inkex import load_svg, ShapeElement, Defs
class PdfLatex(TempDirMixin, inkex.GenerateExtension):
"""
Use pdflatex to generate LaTeX, this whole hack is required because
we don't want to open a LaTeX document as a document, but as a
generated fragment (like import, but done manually).
"""
def add_arguments(self, pars):
pars.add_argument('--formule', type=str, default='')
pars.add_argument('--packages', type=str, default='')
def generate(self):
tex_file = os.path.join(self.tempdir, 'input.tex')
pdf_file = os.path.join(self.tempdir, 'input.pdf') # Auto-generate by pdflatex
svg_file = os.path.join(self.tempdir, 'output.svg')
with open(tex_file, 'w') as fhl:
self.write_latex(fhl)
call('pdflatex', tex_file,\
output_directory=self.tempdir,\
halt_on_error=True, oldie=True)
inkscape(pdf_file, export_filename=svg_file, pdf_page=1,
pdf_poppler=True, export_type="svg")
with open(svg_file, 'r') as fhl:
svg = load_svg(fhl).getroot()
svg.set_random_ids(backlinks=True)
for child in svg:
if isinstance(child, ShapeElement):
yield child
elif isinstance(child, Defs):
for def_child in child:
#def_child.set_random_id()
self.svg.defs.append(def_child)
def write_latex(self, stream):
"""Takes a forumle and wraps it in latex"""
stream.write(r"""%% processed with pdflatex.py
\documentclass{minimal}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
""")
for package in self.options.packages.split(','):
if package:
stream.write('\\usepackage{{{}}}\n'.format(package))
stream.write("\n\\begin{document}\n")
stream.write(self.options.formule)
stream.write("\n\\end{document}\n")
if __name__ == '__main__':
PdfLatex().run()
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