52 lines
1.3 KiB
Ruby
52 lines
1.3 KiB
Ruby
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module HeadJsHelper
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JAVASCRIPT_LIBRARIES = {}
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YAML.load_file(Rails.root.join('config', 'javascript_libraries.yml')).each do |name, src|
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JAVASCRIPT_LIBRARIES[name.to_sym] = src
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end
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def html5
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content_for :html5, "<!--[if lt IE 9]>#{javascript_tag(JAVASCRIPT_LIBRARIES[:html5])}<![endif]-->".html_safe
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end
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def javascript_chain(*javascripts)
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# two-dimensional array: list of chains
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@javascript_chains ||= []
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@javascript_chains << javascripts
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end
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def javascript_chains
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if @javascript_chains
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javascript_include_tag('head') + "\n" + javascript_chains_tag(@javascript_chains)
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end
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end
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def javascript_chain_line(chain)
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chain_args = chain.map {
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|script_name| javascript_library_path(script_name).inspect
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}.join(', ')
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"head.js(#{chain_args});"
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end
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def javascript_chains_tag(chains)
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output_js do |js|
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chains.each do |chain|
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js << javascript_chain_line(chain)
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end
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end
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end
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private
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def javascript_library_path(script_name)
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script_name.is_a?(Symbol) ? JAVASCRIPT_LIBRARIES[script_name] : javascript_path(script_name)
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end
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def output_js(&block)
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javascript_tag(safe_output(&block))
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end
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def safe_output(&block)
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[].tap(&block).join("\n").html_safe
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end
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end
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