4 files changed, 25 insertions, 1 deletions
diff --git a/app/models/change.rb b/app/models/change.rb
index d14f435a4..385fe5acb 100644
--- a/app/models/change.rb
+++ b/app/models/change.rb
@@ -19,4 +19,8 @@ class Change < ActiveRecord::Base
   belongs_to :changeset
   
   validates_presence_of :changeset_id, :action, :path
+  
+  def relative_path
+    changeset.repository.relative_path(path)
+  end
 end
diff --git a/app/models/repository.rb b/app/models/repository.rb
index 8b1f8d0af..1ea77f24f 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -64,6 +64,11 @@ class Repository < ActiveRecord::Base
       :order => "committed_on DESC, #{Changeset.table_name}.id DESC").collect(&:changeset)
   end
   
+  # Returns a path relative to the url of the repository
+  def relative_path(path)
+    path
+  end
+  
   def latest_changeset
     @latest_changeset ||= changesets.find(:first)
   end
diff --git a/app/models/repository/subversion.rb b/app/models/repository/subversion.rb
index 0c2239c43..3981d6f4c 100644
--- a/app/models/repository/subversion.rb
+++ b/app/models/repository/subversion.rb
@@ -35,6 +35,11 @@ class Repository::Subversion < Repository
     revisions ? changesets.find_all_by_revision(revisions.collect(&:identifier), :order => "committed_on DESC") : []
   end
   
+  # Returns a path relative to the url of the repository
+  def relative_path(path)
+    path.gsub(Regexp.new("^\/?#{Regexp.escape(relative_url)}"), '')
+  end
+  
   def fetch_changesets
     scm_info = scm.info
     if scm_info
@@ -71,4 +76,14 @@ class Repository::Subversion < Repository
       end
     end
   end
+  
+  private
+  
+  # Returns the relative url of the repository
+  # Eg: root_url = file:///var/svn/foo
+  #     url      = file:///var/svn/foo/bar
+  #     => returns /bar
+  def relative_url
+    @relative_url ||= url.gsub(Regexp.new("^#{Regexp.escape(root_url)}"), '')
+  end
 end
diff --git a/app/views/repositories/revision.rhtml b/app/views/repositories/revision.rhtml
index f1e176669..2fdf58faf 100644
--- a/app/views/repositories/revision.rhtml
+++ b/app/views/repositories/revision.rhtml
@@ -49,7 +49,7 @@
 <td><div class="square action_<%= change.action %>"></div> <%= change.path %> <%= "(#{change.revision})" unless change.revision.blank?  %></td>
 <td align="right">
 <% if change.action == "M" %>
-<%= link_to l(:label_view_diff), :action => 'diff', :id => @project, :path => without_leading_slash(change.path), :rev => @changeset.revision %>
+<%= link_to l(:label_view_diff), :action => 'diff', :id => @project, :path => without_leading_slash(change.relative_path), :rev => @changeset.revision %>
 <% end %>
 </td>
 </tr>