Source code for boxes.formats

#!/usr/bin/env python3
# Copyright (C) 2013-2014 Florian Festi
#
#   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 3 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, see <http://www.gnu.org/licenses/>.


import subprocess
import tempfile
import os
import shutil
from boxes.drawing import SVGSurface, PSSurface, LBRN2Surface, Context

[docs]class Formats: pstoedit_candidates = ["/usr/bin/pstoedit", "pstoedit", "pstoedit.exe"] _BASE_FORMATS = ['svg', 'svg_Ponoko', 'ps', 'lbrn2'] formats = { "svg": None, "svg_Ponoko": None, "ps": None, "lbrn2": None, "dxf": "-flat 0.1 -f dxf:-mm".split(), "gcode": "-f gcode".split(), "plt": "-f plot-hpgl".split(), "ai": "-f ps2ai".split(), "pdf": "-f pdf".split(), } http_headers = { "svg": [('Content-type', 'image/svg+xml; charset=utf-8')], "svg_Ponoko": [('Content-type', 'image/svg+xml; charset=utf-8')], "ps": [('Content-type', 'application/postscript')], "lbrn2": [('Content-type', 'application/lbrn2')], "dxf": [('Content-type', 'image/vnd.dxf')], "plt": [('Content-type', ' application/vnd.hp-hpgl')], "gcode": [('Content-type', 'text/plain; charset=utf-8')], # "" : [('Content-type', '')], } def __init__(self): for cmd in self.pstoedit_candidates: self.pstoedit = shutil.which(cmd) if self.pstoedit: break
[docs] def getFormats(self): if self.pstoedit: return sorted(self.formats.keys()) return self._BASE_FORMATS
[docs] def getSurface(self, fmt, filename): if fmt in ("svg", "svg_Ponoko"): surface = SVGSurface(filename) elif fmt == "lbrn2": surface = LBRN2Surface(filename) else: surface = PSSurface(filename) ctx = Context(surface) return surface, ctx
[docs] def convert(self, filename, fmt, metadata=None): if fmt not in self._BASE_FORMATS: fd, tmpfile = tempfile.mkstemp(dir=os.path.dirname(filename)) cmd = [self.pstoedit] + self.formats[fmt] + [filename, tmpfile] err = subprocess.call(cmd) if err: # XXX show stderr output try: os.unlink(tmpfile) except: pass raise ValueError("Conversion failed. pstoedit returned %i" % err) os.rename(tmpfile, filename)