epub.rb in softcover-1.1.20

- old
+ new

@@ -270,11 +270,11 @@
         # Sometimes in tests the phantomjs_source.html file is missing.
         # It shouldn't ever happen, but it does no harm to skip it.
         return nil unless File.exist?('phantomjs_source.html')
         raw_source = File.read('phantomjs_source.html')
         source = strip_attributes(Nokogiri::HTML(raw_source))
-        rm 'phantomjs_source.html'
+        # rm 'phantomjs_source.html'
         # Remove the first body div, which is the hidden MathJax SVGs.
         if (mathjax_svgs = source.at_css('body div'))
           mathjax_svgs.remove
         else
           # There's not actually any math, so return nil.
@@ -352,11 +352,21 @@
       # Returns true if a string appears to have LaTeX math.
       # We detect math via opening math commands: \(, \[, and \begin{equation}
       # This gives a false positive when math is included in verbatim
       # environments and nowhere else, but it does little harm (requiring only
       # an unnecessary call to page.js).
+      # The regex includes both standard (La)TeX and amsmath extensions.
       def math?(string)
-        !!string.match(/(?:\\\(|\\\[|\\begin{equation})/)
+        math_regex = /(?:\\\(
+                        |\\\[
+                        |\\begin{(?:equation
+                                   |align
+                                   |gather
+                                   |flalign
+                                   |multline
+                                   |alignat
+                                   |split))/x
+        !!string.match(math_regex)
       end
 
       def create_style_files(options)
         html_styles = File.join('html', 'stylesheets')
         epub_styles = File.join('epub', 'OEBPS', 'styles')
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