Hi,
I tried to use matplotlib.rcParams['svg.embed_char_paths'] = False in
order to have editable text in exported SVG, but there was an encoding
issue and the file data could not be written (traceback appended).
Therefore I exchanged the XML character escaping from sax in
backend_svg.py with python's native XML escape capability (see appended
diff), and voilà it works!
The conversion of mathtext to SVG is still not so nice because specific
fonts (cmmi10, cmr10, cmsy10) are used that encode mathematic symbols
with other unrelated characters. The formula display will totally break
if these fonts aren't installed, and editing is a pain. It would
therefore be great if unicode characters were used so that the correct
display is not so much dependent on those specific fonts. Would this
introduce other problems and where would be the best point to make that
change?
Greetings,
Dieter
Traceback (most recent call last):
File "/home/weber/Promotion/svn/report/MainWindow.py", line 218, in onExport
figure.savefig(tmp, format=format, transparent=True)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/figure.py", line
1160, in savefig
self.canvas.print_figure(*args, **kwargs)
File
"/usr/local/lib/python2.6/dist-packages/matplotlib/backends/backend_wxagg.py",
line 100, in print_figure
FigureCanvasAgg.print_figure(self, filename, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/backend_bases.py",
line 1963, in print_figure
**kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/backend_bases.py",
line 1758, in print_svg
return svg.print_svg(*args, **kwargs)
File
"/usr/local/lib/python2.6/dist-packages/matplotlib/backends/backend_svg.py",
line 870, in print_svg
return self._print_svg(filename, svgwriter, fh_to_close, **kwargs)
File
"/usr/local/lib/python2.6/dist-packages/matplotlib/backends/backend_svg.py",
line 905, in _print_svg
self.figure.draw(renderer)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/artist.py", line 55,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/figure.py", line 874,
in draw
func(*args)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/artist.py", line 55,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/axes.py", line 1954,
in draw
a.draw(renderer)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/artist.py", line 55,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/axis.py", line 986,
in draw
tick.draw(renderer)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/artist.py", line 55,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/axis.py", line 234,
in draw
self.label1.draw(renderer)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/artist.py", line 55,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/matplotlib/text.py", line 591,
in draw
ismath=ismath)
File
"/usr/local/lib/python2.6/dist-packages/matplotlib/backends/backend_svg.py",
line 676, in draw_text
write(svg)
File "/usr/lib/python2.6/codecs.py", line 801, in write
data, bytesdecoded = self.decode(data, self.errors)
File "/usr/lib/python2.6/encodings/utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2212' in position
155: ordinal not in range(128)
Index: lib/matplotlib/backends/backend_svg.py
===================================================================
--- lib/matplotlib/backends/backend_svg.py (Revision 8841)
+++ lib/matplotlib/backends/backend_svg.py (Arbeitskopie)
@@ -23,8 +23,11 @@
from matplotlib.transforms import Affine2D
from matplotlib import _png
-from xml.sax.saxutils import escape as escape_xml_text
+#from xml.sax.saxutils import escape as escape_xml_text
+def escape_xml_text(s):
+ return s.encode('ascii', 'xmlcharrefreplace')
+
backend_version = __version__
def new_figure_manager(num, *args, **kwargs):
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