Remove TeX

As discussed with @vmg
MathJax is available via a flag for those self hosting gollum

lib/gollum.rb

@@ -18,12 +18,11 @@ require File.expand_path('../gollum/file', __FILE__)
 require File.expand_path('../gollum/file_view', __FILE__)
 require File.expand_path('../gollum/markup', __FILE__)
 require File.expand_path('../gollum/sanitization', __FILE__)
-require File.expand_path('../gollum/tex', __FILE__)
 require File.expand_path('../gollum/web_sequence_diagram', __FILE__)
 require File.expand_path('../gollum/frontend/uri_encode_component', __FILE__)
 
 module Gollum
-  VERSION = '2.2.9'
+  VERSION = '2.3.0'
 
   def self.assets_path
     ::File.expand_path('gollum/frontend/public', ::File.dirname(__FILE__))

lib/gollum/markup.rb

@@ -33,7 +33,6 @@ module Gollum
       @dir     = ::File.dirname(page.path)
       @tagmap  = {}
       @codemap = {}
-      @texmap  = {}
       @wsdmap  = {}
       @premap  = {}
       @toc = nil
@@ -57,7 +56,6 @@ module Gollum
       data = extract_metadata(data)
       data = extract_gitcode(data)
       data = extract_code(data)
-      data = extract_tex(data)
       data = extract_wsd(data)
       data = extract_tags(data)
       begin
@@ -79,7 +77,6 @@ module Gollum
       data = doc.to_xhtml
 
       data = process_toc_tags(data)
-      data = process_tex(data)
       data = process_wsd(data)
       data.gsub!(/<p><\/p>/) do
         ''
@@ -126,47 +123,6 @@ module Gollum
       [doc, toc]
     end
 
-    #########################################################################
-    #
-    # TeX
-    #
-    #########################################################################
-
-    # Extract all TeX into the texmap and replace with placeholders.
-    #
-    # data - The raw String data.
-    #
-    # Returns the placeholder'd String data.
-    def extract_tex(data)
-      data.gsub(/\\\[\s*(.*?)\s*\\\]/m) do
-        tag = CGI.escapeHTML($1)
-        id  = Digest::SHA1.hexdigest(tag)
-        @texmap[id] = [:block, tag]
-        id
-      end.gsub(/\\\(\s*(.*?)\s*\\\)/m) do
-        tag = CGI.escapeHTML($1)
-        id  = Digest::SHA1.hexdigest(tag)
-        @texmap[id] = [:inline, tag]
-        id
-      end
-    end
-
-    # Process all TeX from the texmap and replace the placeholders with the
-    # final markup.
-    #
-    # data - The String data (with placeholders).
-    #
-    # Returns the marked up String data.
-    def process_tex(data)
-      @texmap.each do |id, spec|
-        type, tex = *spec
-        data.gsub!(id) do
-          Gollum::Tex.to_html(tex, type)
-        end
-      end
-      data
-    end
-
     #########################################################################
     #
     # Tags

lib/gollum/tex.rb

@@ -1,14 +0,0 @@
-require 'escape_utils'
-
-module Gollum
-  module Tex
-    TEX_URL = "http://www.mathtran.org/cgi-bin/toy/"
-    TEX_SIZES = { :inline => 2, :block => 4 }
-
-    def self.to_html(tex, type = :inline)
-      tex_uri = EscapeUtils.escape_uri(tex)
-      tex_alt = EscapeUtils.escape_html(tex)
-      %{<img src="#{TEX_URL}?D=#{TEX_SIZES[type]};tex=#{tex_uri}" alt="#{tex_alt}">}
-    end
-  end
-end