initial changes to add an option to select either context or project as grouping of todos on home or tag page

* new menu item in view menu
* js to toggle view
* store setting in cookie to keep de choice of view persistent
* refactor index and tag page of todos to look more alike
* refactor context and project partials to look more alike

app/helpers/application_helper.rb

@@ -1,6 +1,28 @@
 # The methods added to this helper will be available to all templates in the
 # application.
 module ApplicationHelper
+
+  def group_view_by_menu_entry
+    # not set, no menu entry
+    return "" if @group_view_by.nil?
+
+    # if view == context, the menu shows Order By Project
+    menu_name = @group_view_by == 'context' ? 'project' : 'context'
+
+    content_tag(:li) do
+      link_to( 
+        t("layouts.navigation.group_view_by_#{menu_name}"), 
+        '#', 
+        {:id => "group_view_by_link", :accesskey => "g", :title => t('layouts.navigation.group_view_by_title'), :x_current_group_by => @group_view_by} )
+    end
+  end
+
+  def container_toggle(id)
+    link_to(
+      image_tag("blank.png", :alt => t('common.collapse_expand')),
+      "#", 
+      {:class => "container_toggle", :id => id} )
+  end
   
   def navigation_link(name, options = {}, html_options = nil, *parameters_for_method_reference)
     link_to name, options, html_options

app/helpers/contexts_helper.rb

@@ -1,4 +1,12 @@
 module ContextsHelper
+
+  def show_context_name(context)
+    if source_view_is :context
+      content_tag(:span, :id => "context_name"){context.name}
+    else
+      link_to_context( context )
+    end
+  end
   
   def link_to_delete_context(context, descriptor = sanitize(context.name))
     link_to(descriptor,

app/helpers/projects_helper.rb

@@ -1,5 +1,19 @@
 module ProjectsHelper
 
+  def show_project_name(project)
+    if source_view_is :project
+      content_tag(:span, :id => "project_name"){project.name}
+    else
+      link_to_project( project )
+    end
+  end
+
+  def show_project_settings(project)
+    content_tag(:div, :id => dom_id(project, "container"), :class=>"list") do
+      render :partial => "projects/project_settings", :object => project
+    end
+  end
+
   def project_next_prev
     html = ""
     html << link_to_project(@previous_project, "&laquo; #{@previous_project.shortened_name}".html_safe) if @previous_project

app/helpers/todos_helper.rb

@@ -1,5 +1,19 @@
 module TodosHelper
 
+  def empty_message_holder(show)
+    content_tag(:div, :id => "no_todos_in_view", :class => "container context", :style => "display:" + (show ? "block" : "none") ) do
+      content_tag(:h2) { t('todos.no_actions_found_title') }
+      content_tag(:div, :class => "message") do
+        content_tag(:p) { t('todos.no_actions_found') }
+      end
+    end
+  end
+
+  def show_grouped_todos
+    collection = (@group_view_by == 'context') ? @contexts_to_show : @projects_to_show
+    render(:partial => collection, :locals => { :collapsible => true })
+  end
+
   def remote_star_icon(todo=@todo)
     link_to( image_tag_for_star(todo),
       toggle_star_todo_path(todo),