73 lines
3 KiB
Ruby
73 lines
3 KiB
Ruby
# The methods added to this helper will be available to all templates in the application.
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module ApplicationHelper
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# Accepts a container (hash, array, enumerable, your type) and returns a string of option tags. Given a container
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# where the elements respond to first and last (such as a two-element array), the "lasts" serve as option values and
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# the "firsts" as option text. Hashes are turned into this form automatically, so the keys become "firsts" and values
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# become lasts. If +selected+ is specified, the matching "last" or element will get the selected option-tag.
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#
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# Examples (call, result):
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# html_options([["Dollar", "$"], ["Kroner", "DKK"]])
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# <option value="$">Dollar</option>\n<option value="DKK">Kroner</option>
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#
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# html_options([ "VISA", "Mastercard" ], "Mastercard")
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# <option>VISA</option>\n<option selected>Mastercard</option>
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#
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# html_options({ "Basic" => "$20", "Plus" => "$40" }, "$40")
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# <option value="$20">Basic</option>\n<option value="$40" selected>Plus</option>
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def html_options(container, selected = nil)
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container = container.to_a if Hash === container
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html_options = container.inject([]) do |options, element|
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if element.respond_to?(:first) && element.respond_to?(:last)
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if element.last != selected
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options << "<option value=\"#{element.last}\">#{element.first}</option>"
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else
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options << "<option value=\"#{element.last}\" selected>#{element.first}</option>"
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end
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else
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options << ((element != selected) ? "<option>#{element}</option>" : "<option selected>#{element}</option>")
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end
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end
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html_options.join("\n")
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end
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# Creates a hyperlink to a Wiki page, without checking if the page exists or not
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def link_to_existing_page(page, text = nil, html_options = {})
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link_to(
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text || page.plain_name,
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{:web => @web.address, :action => 'show', :id => page.name, :only_path => true},
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html_options)
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end
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# Creates a hyperlink to a Wiki page, or to a "new page" form if the page doesn't exist yet
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def link_to_page(page_name, web = @web, text = nil, options = {})
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raise 'Web not defined' if web.nil?
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home_page_url = url_for :web => web.address, :action => 'show', :id => 'HomePage', :only_path => true
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base_url = home_page_url.sub(%r-/show/HomePage/?$-, '')
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web.make_link(page_name, text, options.merge(:base_url => base_url))
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end
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# Creates a menu of categories
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def categories_menu
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if @categories.empty?
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''
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else
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"<div id=\"categories\">\n" +
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'<strong>Categories</strong>:' +
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'[' + link_to_unless_current('Any', :web => @web.address, :action => @action_name) + "]\n" +
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@categories.map { |c|
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link_to_unless_current(c, :web => @web.address, :action => @action_name, :category => c)
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}.join(', ') + "\n" +
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'</div>'
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end
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end
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# Performs HTML escaping on text, but keeps linefeeds intact (by replacing them with <br/>)
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def escape_preserving_linefeeds(text)
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h(text).gsub(/\n/, '<br/>')
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end
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end
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