Fixed: View differences for individual file of a changeset fails if the subversion repository URL doesn't point to the repository root (#1209, #1262, #1275).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1446 e93f8b46-1217-0410-a6f0-8f06a7374b81

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

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

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