pagination on the history page

lib/gollum/frontend/app.rb

@@ -80,9 +80,11 @@ module Precious
     end
 
     get '/history/:name' do
-      @name = params[:name]
-      wiki = Gollum::Wiki.new($path)
-      @page = wiki.page(@name)
+      @name     = params[:name]
+      wiki      = Gollum::Wiki.new($path)
+      @page     = wiki.page(@name)
+      @page_num = [params[:page].to_i, 1].max
+      @versions = @page.versions :page => @page_num
       mustache :history
     end
 

lib/gollum/frontend/templates/history.mustache

@@ -10,6 +10,7 @@
           <th colspan="5">
             Select any two versions to <input type="submit" value="Compare" />
           </th>
+        </tr>
         {{#versions}}
           <tr class="commit">
             <td class="checkbox">
@@ -27,6 +28,10 @@
           </tr>
         {{/versions}}
       </table>
+      <div class="pagination">
+        {{{previous_link}}}
+        {{{next_link}}}
+      </div>
     </form>
   </div>
 </div>

lib/gollum/frontend/views/history.rb

@@ -1,26 +1,44 @@
 module Precious
   module Views
     class History < Layout
-      attr_reader :page
+      attr_reader :page, :page_num
 
       def title
         "History of #{@page.title}"
       end
 
       def versions
-        i = @page.versions.size + 1
-        @page.versions.map do |v|
+        i = @versions.size + 1
+        @versions.map do |v|
           i -= 1
-          { :id => v.id,
-            :id7 => v.id[0..6],
-            :num => i,
+          { :id       => v.id,
+            :id7      => v.id[0..6],
+            :num      => i,
             :selected => @page.version.id == v.id,
-            :author => v.author.name,
-            :message => v.message,
-            :date => v.committed_date.strftime("%B %d, %Y"),
+            :author   => v.author.name,
+            :message  => v.message,
+            :date     => v.committed_date.strftime("%B %d, %Y"),
             :gravatar => Digest::MD5.hexdigest(v.author.email) }
         end
       end
+
+      def previous_link
+        label = "&laquo; Previous"
+        if @page_num == 1
+          %(<span class="disabled">#{label}</span>)
+        else
+          %(<a href="/history/#{@page.name}?page=#{@page_num-1}" hotkey="h">#{label}</a>)
+        end
+      end
+
+      def next_link
+        label = "Next &raquo;"
+        if @versions.size == Gollum::Page.per_page
+          %(<a href="/history/#{@page.name}?page=#{@page_num+1}" hotkey="l">#{label}</a>)
+        else
+          %(<span class="disabled">#{label}</span>)
+        end
+      end
     end
   end
 end