epub.rb in softcover-1.3.0

- old
+ new

@@ -326,15 +326,15 @@
           ex2em_height_scaling = 0.51     # =1ex/1em for math png height
           ex2em_valign_scaling = 0.481482 # =1ex/1em for math png vertical-align
           ex2pt_scale_factor = 15         # =1ex/1pt scaling for SVG-->PNG conv.
           # These are used a three-step process below: Extract, Convert, Replace
           # STEP1: Extract information from svg tag.
-          svg_height = svg['style'].scan(/height: (.*?);/).flatten.first
+          svg_height = svg['height']
           if svg_height
             svg_height_in_ex = Float(svg_height.gsub('ex',''))
-            png_height = (svg_height_in_ex * ex2em_height_scaling).to_s + 'em'
             # MathJax sets SVG height in `ex` units but we want em units for PNG
+            png_height = (svg_height_in_ex * ex2em_height_scaling).to_s + 'em'
           end
           # Extract vertical-align css proprty for for inline math.
           if svg.parent.parent.attr('class') == "inline_math"
             vertical_align = svg['style'].scan(/vertical-align: (.*?);/).flatten.first
             if vertical_align
@@ -363,11 +363,11 @@
             end
           end
           rm svg_filename
           # STEP 3: Replace svg element with an equivalent png.
           png = Nokogiri::XML::Node.new('img', source)
-          png['src'] = File.join('images', 'texmath', File.basename(png_filename))
-          png['alt'] = png_filename.sub('.png', '')
+          png['src']    = File.join('images', 'texmath', File.basename(png_filename))
+          png['alt']    = png_filename.sub('.png', '')
           png['style']  = 'height:' + png_height + ';'
           if png_valign
             png['style'] += ' vertical-align:' + png_valign + ';'
           end
           svg.replace(png)
\ No newline at end of file