diff options
Diffstat (limited to 'actionpack/lib/action_view')
-rw-r--r-- | actionpack/lib/action_view/helpers/text_helper.rb | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/actionpack/lib/action_view/helpers/text_helper.rb b/actionpack/lib/action_view/helpers/text_helper.rb index ccd6c54cc8..a5d43b90f4 100644 --- a/actionpack/lib/action_view/helpers/text_helper.rb +++ b/actionpack/lib/action_view/helpers/text_helper.rb @@ -448,8 +448,10 @@ module ActionView # array every time it is called. This can be used for example, to alternate # classes for table rows. You can use named cycles to allow nesting in loops. # Passing a Hash as the last parameter with a <tt>:name</tt> key will create a - # named cycle. You can manually reset a cycle by calling reset_cycle and passing the - # name of the cycle. + # named cycle. The default name for a cycle without a +:name+ key is + # <tt>"default"</tt>. You can manually reset a cycle by calling reset_cycle + # and passing the name of the cycle. The current cycle string can be obtained + # anytime using the current_cycle method. # # ==== Examples # # Alternate CSS classes for even and odd numbers... @@ -496,6 +498,23 @@ module ActionView return cycle.to_s end + # Returns the current cycle string after a cycle has been started. Useful + # for complex table highlighing or any other design need which requires + # the current cycle string in more than one place. + # + # ==== Example + # # Alternate background colors + # @items = [1,2,3,4] + # <% @items.each do |item| %> + # <div style="background-color:<%= cycle("red","white","blue") %>"> + # <span style="background-color:<%= current_cycle %><%= item %></span> + # </div> + # <% end %> + def current_cycle(name = "default") + cycle = get_cycle(name) + cycle.current_value unless cycle.nil? + end + # Resets a cycle so that it starts from the first element the next time # it is called. Pass in +name+ to reset a named cycle. # @@ -532,11 +551,29 @@ module ActionView @index = 0 end + def current_value + @values[previous_index].to_s + end + def to_s value = @values[@index].to_s - @index = (@index + 1) % @values.size + @index = next_index return value end + + private + + def next_index + step_index(1) + end + + def previous_index + step_index(-1) + end + + def step_index(n) + (@index + n) % @values.size + end end private |