[render_math] Always use HTTPS

- Accessing HTTPS resources from HTTP site was never a problem (it's the
other way around that could issue browser warnings)
- Using protocol-relative method of accessing content is frowned upon
nowadays

render_math/Readme.md

@@ -95,8 +95,6 @@ is less than `responsive_break` (see below) and if so, sets `align` to `left`, `
 when setting `responsive_align` to `True`. **Default Value**: 768
  * `process_summary`: [boolean] ensures math will render in summaries and fixes math in that were cut off.
 Requires [BeautifulSoup4](http://www.crummy.com/software/BeautifulSoup/bs4/doc/) be installed. **Default Value**: `True`
- * `force_tls`: [boolean] forces mathjax script to load from cdn using https. If set to false, will use document.location.protocol
-**Default Value**: `False`
  * `message_style`: [string] This value controls the verbosity of the messages in the lower left-hand corner. Set it to `None` to eliminate all messages.
 **Default Value**: normal
 

render_math/math.py

@@ -69,11 +69,10 @@ def process_settings(pelicanobj):
     mathjax_settings['responsive_break'] = '768'  # The break point at which it math is responsively aligned (in pixels)
     mathjax_settings['mathjax_font'] = 'default'  # forces mathjax to use the specified font.
     mathjax_settings['process_summary'] = BeautifulSoup is not None  # will fix up summaries if math is cut off. Requires beautiful soup
-    mathjax_settings['force_tls'] = 'false'  # will force mathjax to be served by https - if set as False, it will only use https if site is served using https
     mathjax_settings['message_style'] = 'normal'  # This value controls the verbosity of the messages in the lower left-hand corner. Set it to "none" to eliminate all messages
 
     # Source for MathJax
-    mathjax_settings['source'] = "'//cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML'"
+    mathjax_settings['source'] = "'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML'"
 
     # Get the user specified settings
     try:
@@ -157,9 +156,6 @@ def process_settings(pelicanobj):
         if key == 'responsive' and isinstance(value, bool):
             mathjax_settings[key] = 'true' if value else 'false'
 
-        if key == 'force_tls' and isinstance(value, bool):
-            mathjax_settings[key] = 'true' if value else 'false'
-
         if key == 'responsive_break' and isinstance(value, int):
             mathjax_settings[key] = str(value)
 

render_math/mathjax_script_template

@@ -10,11 +10,9 @@ if (!document.getElementById('mathjaxscript_pelican_#%@#$@#')) {{
     }}
 
     var mathjaxscript = document.createElement('script');
-    var location_protocol = ({force_tls}) ? 'https' : document.location.protocol;
-    if (location_protocol !== 'http' && location_protocol !== 'https') location_protocol = 'https:';
     mathjaxscript.id = 'mathjaxscript_pelican_#%@#$@#';
     mathjaxscript.type = 'text/javascript';
-    mathjaxscript.src = location_protocol + {source};
+    mathjaxscript.src = {source};
     mathjaxscript[(window.opera ? "innerHTML" : "text")] =
         "MathJax.Hub.Config({{" +
         "    config: ['MMLorHTML.js']," +