Improve formatting of rich text in pdf

app/helpers/pdf_helper.rb

@@ -1,8 +1,17 @@
 module PdfHelper
   def prepare_rich_text(rich_text)
+    return rich_text
+
+    { del: 'strikethrough' }.each do |tag, replacement|
+      rich_text = rich_text.to_s.gsub("<#{tag}", "<#{replacement}")
+      rich_text = rich_text.to_s.gsub("</#{tag}>", "</#{replacement}>")
+    end
+
     %w[div p del blockquote pre code].each do |tag|
       rich_text = rich_text.to_s.gsub(%r{<#{tag}.*?>|</#{tag}>}, '')
     end
+    rich_text.gsub!(/<h1.*?>/, '')
+    rich_text.gsub!(%r{</h1>}, '<br><br>')
     rich_text
   end
 end

app/views/reports/show.pdf.prawn

@@ -1,14 +1,17 @@
 prawn_document do |pdf|
-  pdf.text @report.name
+  pdf.markup_options = {
+    heading1: { style: :bold, size: 14, margin_bottom: 10, margin_top: 20 }
+  }
+  pdf.text @report.name, size: 22, style: :bold, align: :center
   @report.elements.each do |element|
-    pdf.text element.title
+    pdf.text element.title, size: 16, style: :bold
     pdf.text element.path
-    pdf.text prepare_rich_text(element.description_html), inline_format: true
+    pdf.markup prepare_rich_text(element.description_html.to_s), inline_format: true
 
     element.success_criteria.each do |success_criterion|
-      pdf.text success_criterion.title
-      pdf.text prepare_rich_text(success_criterion.description_html), inline_format: true
-      pdf.text prepare_rich_text(success_criterion.comment_html), inline_format: true
+      pdf.text success_criterion.title, size: 14, style: :bold
+      pdf.markup prepare_rich_text(success_criterion.description_html.to_s), inline_format: true
+      pdf.markup prepare_rich_text(success_criterion.comment_html.to_s), inline_format: true
     end
   end
 end