1 files changed, 83 insertions, 0 deletions
diff --git a/share/extensions/pdflatex.py b/share/extensions/pdflatex.py
new file mode 100755
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+++ b/share/extensions/pdflatex.py
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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()