Module: Merb::MerbAdmin::MainHelper
- Included in:
- MerbAdmin::Application, MerbAdmin::Main
- Defined in:
- app/helpers/main_helper.rb
Instance Method Summary collapse
- #object_title(object) ⇒ Object
-
#paginate(current_page, page_count, options = {}) ⇒ Object
Given a page count and the current page, we generate a set of pagination links.
Instance Method Details
#object_title(object) ⇒ Object
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# File 'app/helpers/main_helper.rb', line 5 def object_title(object) if object.respond_to?(:name) object.name elsif object.respond_to?(:title) object.title else "#{object.class.to_s} ##{object.id}" end end |
#paginate(current_page, page_count, options = {}) ⇒ Object
Given a page count and the current page, we generate a set of pagination links.
-
We use an inner and outer window into a list of links. For a set of
20 pages with the current page being 10: outer_window:
1 2 ..... 19 20
inner_window
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This is totally adjustable, or can be turned off by giving the :inner_window setting a value of nil.
-
Options
- :left_cut_label => text_for_cut
-
Used when the page numbers need to be cut off to prevent the set of pagination links from being too long. Defaults to ‘…’
- :right_cut_label => text_for_cut
-
Same as :left_cut_label but for the right side of numbers. Defaults to ‘…’
- :outer_window => number_of_pages
-
Sets the number of pages to include in the outer ‘window’ Defaults to 2
- :inner_window => number_of_pages
-
Sets the number of pags to include in the inner ‘window’ Defaults to 7
:page_param => name_of_page_paramiter
Sets the name of the paramiter the paginator uses to return what
page is being requested.
Defaults to 'page'
:url => url_for_links
Provides the base url to use in the page navigation links.
Defaults to ''
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# File 'app/helpers/main_helper.rb', line 49 def paginate(current_page, page_count, = {}) [:left_cut_label] ||= '…' [:right_cut_label] ||= '…' [:outer_window] ||= 2 [:inner_window] ||= 7 [:page_param] ||= 'page' [:url] ||= '' url = .delete(:url) url << (url.include?('?') ? '&' : '?') << [:page_param] pages = { :all => (1..page_count).to_a, :left => [], :center => [], :right => [] } # Only worry about using our 'windows' if the page count is less then # our windows combined. if [:inner_window].nil? || (([:outer_window] * 2) + [:inner_window] + 2) >= page_count pages[:center] = pages[:all] else pages[:left] = pages[:all][0, [:outer_window]] pages[:right] = pages[:all][page_count - [:outer_window], [:outer_window]] pages[:center] = case current_page # allow the inner 'window' to shift to right when close to the left edge # Ex: 1 2 [3] 4 5 6 7 8 9 ... 20 when -infinity .. ([:inner_window] / 2) + 3 pages[:all][[:outer_window], [:inner_window]] + [[:right_cut_label]] # allow the inner 'window' to shift left when close to the right edge # Ex: 1 2 ... 12 13 14 15 16 [17] 18 19 20 when (page_count - ([:inner_window] / 2.0).ceil) - 1 .. infinity [[:left_cut_label]] + pages[:all][page_count - [:inner_window] - [:outer_window], [:inner_window]] # Display the unshifed window # ex: 1 2 ... 5 6 7 [8] 9 10 11 ... 19 20 else [[:left_cut_label]] + pages[:all][current_page - ([:inner_window] / 2) - 1, [:inner_window]] + [[:right_cut_label]] end end b = [] [pages[:left], pages[:center], pages[:right]].each do |p| p.each do |page_number| case page_number when String b << page_number when current_page b << Builder::XmlMarkup.new.span(page_number, :class => "this-page") when page_count b << Builder::XmlMarkup.new.a(page_number, :class => "end", :href => "#{url}=#{page_number}") else b << Builder::XmlMarkup.new.a(page_number, :href => "#{url}=#{page_number}") end end end b.join(" ") end |