70 lines
2.0 KiB
Ruby
70 lines
2.0 KiB
Ruby
require 'sinatra/base'
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require 'sinatra/url_for'
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module Sinatra
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module StaticAssets
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# In HTML <link> and <img> tags have no end tag.
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# In XHTML, on the contrary, these tags must be properly closed.
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#
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# We can choose the appropriate behaviour with +closed+ option:
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#
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# image_tag "/images/foo.png", :alt => "Foo itself", :closed => true
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#
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# The default value of +closed+ option is +false+.
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#
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def image_tag(source, options = {})
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closed = options.delete(:closed)
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options[:src] = url_for(source)
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tag("img", options, closed)
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end
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def stylesheet_link_tag(*sources)
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list, options = extract_options(sources)
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closed = options.delete(:closed)
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list.collect { |source| stylesheet_tag(source, options, closed) }.join("\n")
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end
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def javascript_script_tag(*sources)
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list, options = extract_options(sources)
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list.collect { |source| javascript_tag(source, options) }.join("\n")
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end
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def link_to(desc, url)
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"<a href='#{url_for url}'>#{desc}</a>"
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end
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private
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def tag(name, options = {}, closed = false)
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"<#{name}#{tag_options(options) if options}#{closed ? " />" : ">"}"
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end
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def tag_options(options)
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unless options.empty?
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attrs = []
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attrs = options.map { |key, value| %(#{key}="#{value}") }
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" #{attrs.sort * ' '}" unless attrs.empty?
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end
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end
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def stylesheet_tag(source, options, closed = false)
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tag("link", { :type => "text/css",
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:charset => "utf-8", :media => "screen", :rel => "stylesheet",
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:href => url_for(source) }.merge(options), closed)
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end
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def javascript_tag(source, options)
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tag("script", { :type => "text/javascript", :charset => "utf-8",
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:src => url_for(source) }.merge(options), false) + "</script>"
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end
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def extract_options(a)
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opts = a.last.is_a?(::Hash) ? a.pop : {}
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[a, opts]
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end
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end
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helpers StaticAssets
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end
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