111 lines
4.3 KiB
Ruby
111 lines
4.3 KiB
Ruby
require 'action_view/helpers/tag_helper'
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require 'active_support/core_ext/string/encoding'
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module ActionView
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module Helpers
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module JavaScriptHelper
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JS_ESCAPE_MAP = {
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'\\' => '\\\\',
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'</' => '<\/',
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"\r\n" => '\n',
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"\n" => '\n',
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"\r" => '\n',
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'"' => '\\"',
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"'" => "\\'"
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}
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if "ruby".encoding_aware?
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JS_ESCAPE_MAP["\342\200\250".force_encoding('UTF-8').encode!] = '
'
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else
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JS_ESCAPE_MAP["\342\200\250"] = '
'
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end
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# Escapes carriage returns and single and double quotes for JavaScript segments.
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#
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# Also available through the alias j(). This is particularly helpful in JavaScript responses, like:
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#
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# $('some_element').replaceWith('<%=j render 'some/element_template' %>');
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def escape_javascript(javascript)
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if javascript
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result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|[\n\r"'])/u) {|match| JS_ESCAPE_MAP[match] }
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javascript.html_safe? ? result.html_safe : result
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else
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''
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end
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end
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alias_method :j, :escape_javascript
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# Returns a JavaScript tag with the +content+ inside. Example:
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# javascript_tag "alert('All is good')"
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#
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# Returns:
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# <script type="text/javascript">
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# //<![CDATA[
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# alert('All is good')
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# //]]>
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# </script>
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#
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# +html_options+ may be a hash of attributes for the <tt>\<script></tt>
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# tag. Example:
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# javascript_tag "alert('All is good')", :defer => 'defer'
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# # => <script defer="defer" type="text/javascript">alert('All is good')</script>
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#
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# Instead of passing the content as an argument, you can also use a block
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# in which case, you pass your +html_options+ as the first parameter.
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# <%= javascript_tag :defer => 'defer' do -%>
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# alert('All is good')
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# <% end -%>
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def javascript_tag(content_or_options_with_block = nil, html_options = {}, &block)
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content =
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if block_given?
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html_options = content_or_options_with_block if content_or_options_with_block.is_a?(Hash)
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capture(&block)
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else
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content_or_options_with_block
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end
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content_tag(:script, javascript_cdata_section(content), html_options.merge(:type => Mime::JS))
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end
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def javascript_cdata_section(content) #:nodoc:
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"\n//#{cdata_section("\n#{content}\n//")}\n".html_safe
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end
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# Returns a button whose +onclick+ handler triggers the passed JavaScript.
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#
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# The helper receives a name, JavaScript code, and an optional hash of HTML options. The
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# name is used as button label and the JavaScript code goes into its +onclick+ attribute.
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# If +html_options+ has an <tt>:onclick</tt>, that one is put before +function+.
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#
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# button_to_function "Greeting", "alert('Hello world!')", :class => "ok"
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# # => <input class="ok" onclick="alert('Hello world!');" type="button" value="Greeting" />
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#
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def button_to_function(name, function=nil, html_options={})
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onclick = "#{"#{html_options[:onclick]}; " if html_options[:onclick]}#{function};"
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tag(:input, html_options.merge(:type => 'button', :value => name, :onclick => onclick))
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end
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# Returns a link whose +onclick+ handler triggers the passed JavaScript.
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#
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# The helper receives a name, JavaScript code, and an optional hash of HTML options. The
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# name is used as the link text and the JavaScript code goes into the +onclick+ attribute.
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# If +html_options+ has an <tt>:onclick</tt>, that one is put before +function+. Once all
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# the JavaScript is set, the helper appends "; return false;".
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#
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# The +href+ attribute of the tag is set to "#" unles +html_options+ has one.
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#
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# link_to_function "Greeting", "alert('Hello world!')", :class => "nav_link"
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# # => <a class="nav_link" href="#" onclick="alert('Hello world!'); return false;">Greeting</a>
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#
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def link_to_function(name, function, html_options={})
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onclick = "#{"#{html_options[:onclick]}; " if html_options[:onclick]}#{function}; return false;"
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href = html_options[:href] || '#'
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content_tag(:a, name, html_options.merge(:href => href, :onclick => onclick))
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end
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end
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end
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end
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