Module: Mjs::Helper

Defined in:
lib/mjs/helper.rb,
lib/mjs/sinatra.rb

Constant Summary collapse

JS_ESCAPE_MAP =

derived from actionpack

{
'\\'    => '\\\\',        '</'    => '<\/',
"\r\n"  => '\n',
"\n"    => '\n',        "\r"    => '\n',
'"'     => '\\"',
"'"     => "\\'" }

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.registered(app) ⇒ Object 



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# File 'lib/mjs/sinatra.rb', line 5

def self.registered(app)
  app.helpers Mjs::Helper
end

Instance Method Details

#button_to(name, url = '', opts = {}) ⇒ Object

experimental: not tested yet



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# File 'lib/mjs/helper.rb', line 22

def button_to(name, url='', opts={})
  opts[:type] = 'button'
  opts[:value] = name

  if opts.delete(:remote) || opts[:submit] || opts[:update]
    ajax = remote_function(opts)
    opts[:onclick] = "#{opts.delete(:onclick)}; #{ajax}; return false;"
  end
  %{<input #{ opts.to_xml_attributes }>}
end

#escape_javascript(javascript) ⇒ Object

Escape carrier returns and single and double quotes for JavaScript segments.



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# File 'lib/mjs/helper.rb', line 59

def escape_javascript(javascript)
  if javascript
    javascript.gsub(/(\\|<\/|\r\n|[\n\r"'])/) { JS_ESCAPE_MAP[$1] }
  else
    ''
  end
end

#link_to(name, url = '', opts = {}) ⇒ Object

override! :link_to # for Ajax



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# File 'lib/mjs/helper.rb', line 34

def link_to(name, url='', opts={})
  opts[:href] ||= url

  if opts.delete(:remote) || opts[:submit] || opts[:update]
    ajax = remote_function(opts)
    opts[:onclick] = "#{opts.delete(:onclick)}; #{ajax}; return false;"
    opts[:href] = '#'
  else
    opts[:href] ||= url
  end

  %{<a #{ opts.to_xml_attributes }>#{name}</a>}
end

#page ⇒ Object 



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# File 'lib/mjs/helper.rb', line 6

def page
  @page ||= Mjs::JavaScriptContext.new
end

#remote_function(opts) ⇒ Object 



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# File 'lib/mjs/helper.rb', line 10

def remote_function(opts)
  build_href(opts)
  unless opts[:submit]
    opts[:url] ||= opts[:href]
  end
  function = "jQuery.ajax(%s);" % options_for_ajax(opts)
  confirm  = opts.delete(:confirm)
  function = "if (confirm('#{escape_javascript(confirm)}')) { #{function}; }" if confirm
  return function
end