module JavascriptHelper
def add_javascript_requirement(*args)
@required_javascripts ||= []
args.each do |js|
dependencies_for(js).each { |i| add_javascript_requirement(i) }
@required_javascripts << js unless @required_javascripts.include?(js)
end
end
alias_method :js, :add_javascript_requirement
def dependencies_for(js)
{
:prototype => [],
:effects => [:prototype],
:dragdrop => [:prototype, :effects],
:controls => [:prototype, :effects],
:builder => [:prototype],
:slider => [:prototype, :effects],
:sound => [:prototype],
:behaviour => [:prototype],
:lowpro => [:prototype]
}.merge(respond_to?(:js_dependencies) ? js_dependencies : {})[js.to_sym] || []
end
def javascript_tags
(@required_javascripts || []).collect do |js|
path = JavascriptHelperConfig.use_google_ajax_libs && google_ajax_libs_url(js) || "#{js}.js"
javascript_include_tag(path)
end.join("\n")
end
def google_ajax_libs_url(lib)
if cfg = JavascriptHelperConfig.google_ajax_libs[lib.to_sym]
url = cfg[:prefer_compressed] && cfg[:compressed_url] || cfg[:uncompressed_url]
url.sub("{version}", cfg[:version])
end
end
# used this class to name to avoid collisions since this is included in ApplicationHelper
class JavascriptHelperConfig
cattr_accessor :use_google_ajax_libs
cattr_accessor :google_ajax_libs
self.use_google_ajax_libs = false
self.google_ajax_libs = {
:jQuery => {
:version => "1.2.6",
:compressed_url => "http://ajax.googleapis.com/ajax/libs/jquery/{version}/jquery.min.js",
:uncompressed_url => "http://ajax.googleapis.com/ajax/libs/jquery/{version}/jquery.js",
:prefer_compressed => false
},
:prototype => {
:version => "1.6.0.2",
:uncompressed_url => "http://ajax.googleapis.com/ajax/libs/prototype/{version}/prototype.js"
},
:mootools => {
:version => "1.11",
:compressed_url => "http://ajax.googleapis.com/ajax/libs/mootools/{version}/mootools-yui-compressed.js",
:uncompressed_url => "http://ajax.googleapis.com/ajax/libs/mootools/{version}/mootools.js",
:prefer_compressed => false
},
:dojo => {
:version => "1.1.1",
:compressed_url => "http://ajax.googleapis.com/ajax/libs/dojo/{version}/dojo/dojo.xd.js",
:uncompressed_url => "http://ajax.googleapis.com/ajax/libs/dojo/{version}/dojo/dojo.xd.js.uncompressed.js",
:prefer_compressed => false
}
}
# scriptaculous libraries
%w{builder effects dragdrop controls slider sound}.each do |lib|
self.google_ajax_libs[lib.to_sym] = {
:version => "1.8.1",
:uncompressed_url => "http://ajax.googleapis.com/ajax/libs/scriptaculous/{version}/#{lib}.js"
}
end
end
end
