107 lines
3.1 KiB
Ruby
107 lines
3.1 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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module Helpers
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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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options[:src] = source_url(source_path(source, {:folder => 'images'}))
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tag("img", options)
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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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list.collect { |source| stylesheet_tag(source, options) }.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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alias :javascript_include_tag :javascript_script_tag
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def link_to(desc, url, options = {})
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tag("a", options.merge(:href => url_for(url))) do
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desc
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end
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end
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private
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def tag(name, local_options = {})
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start_tag = "<#{name}#{tag_options(local_options) if local_options}"
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if block_given?
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content = yield
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"#{start_tag}>#{content}</#{name}>"
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else
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"#{start_tag}#{"/" if options.xhtml}>"
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end
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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}="#{Rack::Utils.escape_html(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 = {})
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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 => source_url(source_path(source, {:folder => 'stylesheets', :extension => 'css'})) }.merge(options))
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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 => source_url(source_path(source, {:folder => 'javascripts', :extension => 'js'})) }.merge(options)) do
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end
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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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def source_path(source, options)
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return source if source =~ /^\//
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extension = options[:extension] ? ".#{options[:extension]}" : ""
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"/#{options[:folder]}/#{source}.#{extension}"
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end
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def source_url(source)
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url_with_timestamp = source_url_timestamp url_for(source)
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"#{ENV['asset_host']}#{url_with_timestamp}"
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end
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def source_url_timestamp(url)
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full_url = "#{Sinatra::Application.root}/public#{url}"
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if File.exists? full_url
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timestamp = File.mtime(full_url).to_i
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"#{url}?#{timestamp}"
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else
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url
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end
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end
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end
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def self.registered(app)
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app.helpers StaticAssets::Helpers
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app.disable :xhtml
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end
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end
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register StaticAssets
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end
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