diff options
Diffstat (limited to 'actionview/lib/action_view/helpers/javascript_helper.rb')
-rw-r--r-- | actionview/lib/action_view/helpers/javascript_helper.rb | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/actionview/lib/action_view/helpers/javascript_helper.rb b/actionview/lib/action_view/helpers/javascript_helper.rb new file mode 100644 index 0000000000..e475d5b018 --- /dev/null +++ b/actionview/lib/action_view/helpers/javascript_helper.rb @@ -0,0 +1,75 @@ +require 'action_view/helpers/tag_helper' + +module ActionView + module Helpers + module JavaScriptHelper + JS_ESCAPE_MAP = { + '\\' => '\\\\', + '</' => '<\/', + "\r\n" => '\n', + "\n" => '\n', + "\r" => '\n', + '"' => '\\"', + "'" => "\\'" + } + + JS_ESCAPE_MAP["\342\200\250".force_encoding(Encoding::UTF_8).encode!] = '
' + JS_ESCAPE_MAP["\342\200\251".force_encoding(Encoding::UTF_8).encode!] = '
' + + # Escapes carriage returns and single and double quotes for JavaScript segments. + # + # Also available through the alias j(). This is particularly helpful in JavaScript + # responses, like: + # + # $('some_element').replaceWith('<%=j render 'some/element_template' %>'); + def escape_javascript(javascript) + if javascript + result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|\342\200\251|[\n\r"'])/u) {|match| JS_ESCAPE_MAP[match] } + javascript.html_safe? ? result.html_safe : result + else + '' + end + end + + alias_method :j, :escape_javascript + + # Returns a JavaScript tag with the +content+ inside. Example: + # javascript_tag "alert('All is good')" + # + # Returns: + # <script> + # //<![CDATA[ + # alert('All is good') + # //]]> + # </script> + # + # +html_options+ may be a hash of attributes for the <tt>\<script></tt> + # tag. + # + # javascript_tag "alert('All is good')", defer: 'defer' + # # => <script defer="defer">alert('All is good')</script> + # + # Instead of passing the content as an argument, you can also use a block + # in which case, you pass your +html_options+ as the first parameter. + # + # <%= javascript_tag defer: 'defer' do -%> + # alert('All is good') + # <% end -%> + def javascript_tag(content_or_options_with_block = nil, html_options = {}, &block) + content = + if block_given? + html_options = content_or_options_with_block if content_or_options_with_block.is_a?(Hash) + capture(&block) + else + content_or_options_with_block + end + + content_tag(:script, javascript_cdata_section(content), html_options) + end + + def javascript_cdata_section(content) #:nodoc: + "\n//#{cdata_section("\n#{content}\n//")}\n".html_safe + end + end + end +end |