Fix font sizes when displaying SVGs with fonttype "none" or "svgfont" in Firefox. Closes matplotlib#510.

Author: mdboom

lib/matplotlib/backends/backend_svg.py

@@ -331,7 +331,7 @@ def _get_hatch(self, gc, rgbFace):
         else:
             _, oid = oid
         return oid
-        
+
     def _write_hatches(self):
         if not len(self._hatchd):
             return
@@ -445,7 +445,7 @@ def _write_clips(self):
                 writer.element('rect', x=str(x), y=str(y), width=str(w), height=str(h))
             writer.end('clipPath')
         writer.end('defs')
-    
+
     def _write_svgfonts(self):
         if not rcParams['svg.fonttype'] == 'svgfont':
             return
@@ -926,7 +926,8 @@ def _draw_text_as_text(self, gc, x, y, s, prop, angle, ismath):
             fontstyle = prop.get_style()
 
             attrib = {}
-            style['font-size'] = str(fontsize)
+            # Must add "px" to workaround a Firefox bug
+            style['font-size'] = str(fontsize) + 'px'
             style['font-family'] = str(fontfamily)
             style['font-style'] = prop.get_style().lower()
             attrib['style'] = generate_css(style)
@@ -967,7 +968,8 @@ def _draw_text_as_text(self, gc, x, y, s, prop, angle, ismath):
             spans = {}
             for font, fontsize, thetext, new_x, new_y, metrics in svg_glyphs:
                 style = generate_css({
-                    'font-size': str(fontsize),
+                    # Must add "px" to work around a Firefox bug
+                    'font-size': str(fontsize) + 'px',
                     'font-family': font.family_name,
                     'font-style': font.style_name.lower()})
                 if thetext == 32: