support latex for pdf

5 years ago · 17b1f17a24
parent a8b4f3fe79
commit 17b1f17a24
2 changed files with 29 additions and 3 deletions
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@ -397,6 +397,8 @@ module ApplicationHelper
    raw arr.join('')
  end

+
+
  # 导出pdf时，转化markdown为html
  def to_markdown(text,origin_url)
    return nil if text.blank?
@ -406,10 +408,10 @@ module ApplicationHelper
        :fenced_code_blocks => true,
        :lax_html_blocks => true,
        :strikethrough => true,
-        :superscript => true,
+        :superscript => false,
        :tables => true
    }
-    markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML,options)
+    markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML, options)
    m_t = markdown.render(text)
    m_t&.include?("src=\"") ? m_t&.gsub("src=\"","src=\"#{origin_url}") : m_t
  end
--- a/app/templates/exercise_export/blank_exercise.html.erb
+++ b/app/templates/exercise_export/blank_exercise.html.erb
@ -3,6 +3,30 @@
 <head>
  <meta charset="utf-8">
  <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+
+  <script type="text/x-mathjax-config">
+    MathJax.Hub.Config({
+      jax: ["input/TeX","output/HTML-CSS", "output/PreviewHTML"],
+      showProcessingMessages: false,
+      messageStyle: "none",
+      extensions: ["tex2jax.js"],
+      tex2jax: {
+        inlineMath:  [ ["$", "$"] ],
+        displayMath: [ ["$$","$$"] ],
+        skipTags: ['script', 'noscript', 'style', 'textarea', 'pre','code','a'],
+        ignoreClass:"comment-content"
+      },
+      "HTML-CSS": {
+        styles: {
+          ".MathJax_Display": {
+            display: "inline !important"
+          }
+        }
+      }
+    });
+    MathJax.Hub.Queue(["Typeset", MathJax.Hub, document.getElementById("markdown_content")]);
+  </script>
+  <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
 </head>
 <body>
 <div class="container" style="background-color:#fff;">
@ -58,7 +82,7 @@
      </div>
    </div>
    <div class="clearfix"></div>
-    <div class="mbt10">
+    <div class="mbt10" id="markdown_content">
      <% @exercise_questions.each do |q| %>
        <div class="bdc">
          <div class="pbt5">