Module: Mjs::Helper

Defined in:
lib/mjs/helper.rb

Constant Summary collapse

JS_ESCAPE_MAP =

derived from actionpack

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

Instance Method Summary collapse

Instance Method Details

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

experimental: not tested yet



22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/mjs/helper.rb', line 22

def button_to(name, url='', opts={})
  ajax = remote_function(opts)
  opts[:type] = 'button'
  opts[:value] = name
  opts[:remote] ||= true if opts[:submit]
  if opts.delete(:remote)
    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.



57
58
59
60
61
62
63
 
# File 'lib/mjs/helper.rb', line 57

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



35
36
37
38
39
40
41
42
43
44
 
# File 'lib/mjs/helper.rb', line 35

def link_to(name, url='', opts={})
  opts[:href]   ||= url
  opts[:remote] ||= true if opts[:submit]
  return super unless opts.delete(:remote)

  ajax = remote_function(opts)
  opts[:onclick] = "#{opts.delete(:onclick)}; #{ajax}; return false;"
  opts[:href] = '#'
  %{<a #{ opts.to_xml_attributes }>#{name}</a>}
end

#page ⇒ Object 



5
6
7
 
# File 'lib/mjs/helper.rb', line 5

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

#remote_function(opts) ⇒ Object 



9
10
11
12
13
14
15
16
17
18
19
 
# File 'lib/mjs/helper.rb', line 9

def remote_function(opts)
  build_href(opts)
  unless opts[:submit]
    opts[:url] ||= opts[:href]
    opts[:dataType] = "script"
  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