Module: ActionView::Helpers::FormHelper

Defined in:
lib/textile_editor.rb

Instance Method Summary collapse

Instance Method Details

#textile_editor(object_name, method, options = {}) ⇒ Object

Returns a textarea opening and closing tag set tailored for accessing a specified attribute (identified by method) on an object assigned to the template (identified by object). Additional options on the input tag can be passed as a hash with options and places the textile toolbar above it

Examples

textile_editor(:post, :body, :cols => 20, :rows => 40)
# => <textarea cols="20" rows="40" id="post_body" name="post[body]">
#      #{@post.body}
#    </textarea>

textile_editor(:comment, :text, :size => "20x30")
# => <textarea cols="20" rows="30" id="comment_text" name="comment[text]">
#      #{@comment.text}
#    </textarea>

textile_editor(:application, :notes, :cols => 40, :rows => 15, :class => 'app_input')
# => <textarea cols="40" rows="15" id="application_notes" name="application[notes]" class="app_input">
#      #{@application.notes}
#    </textarea>

textile_editor(:entry, :body, :size => "20x20", :disabled => 'disabled')
# => <textarea cols="20" rows="20" id="entry_body" name="entry[body]" disabled="disabled">
#      #{@entry.body}
#    </textarea>



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# File 'lib/textile_editor.rb', line 38

def textile_editor(object_name, method, options = {})        
  editor_id = options[:id] || '%s_%s' % [object_name, method]
  mode      = options.delete(:simple) ? 'simple' : 'extended'
  (@textile_editor_ids ||= []) << [editor_id.to_s, mode.to_s]

  InstanceTag.new(object_name, method, self, options.delete(:object)).to_text_area_tag(options)
end

#textile_editor_button(text, options = {}) ⇒ Object

registers a new button for the Textile Editor toolbar Parameters:

* +text+: text to display (contents of button tag, so HTML is valid as well)
* +options+: options Hash as supported by +content_tag+ helper in Rails

Example:

The following example adds a button labeled 'Greeting' which triggers an
alert:

<% textile_editor_button 'Greeting', :onclick => "alert('Hello!')" %>

Note: this method must be called before textile_editor_initialize



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# File 'lib/textile_editor.rb', line 69

def textile_editor_button(text, options={})
  return textile_editor_button_separator  if text == :separator
  button = content_tag(:button, text, options)
  button = "TextileEditor.buttons.push(\"%s\");" % escape_javascript(button)
  (@textile_editor_buttons ||= []) << button
end

#textile_editor_button_separator(options = {}) ⇒ Object 



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# File 'lib/textile_editor.rb', line 76

def textile_editor_button_separator(options={})
  button = "TextileEditor.buttons.push(new TextileEditorButtonSeparator('%s'));" % (options[:simple] || '')
  (@textile_editor_buttons ||= []) << button
end

#textile_editor_initialize(*dom_ids) ⇒ Object

adds the necessary javascript include tags, stylesheet tags, and load event with necessary javascript to active textile editor(s) sample output:

<link href="/stylesheets/textile-editor.css" media="screen" rel="Stylesheet" type="text/css" />
<script src="/javascripts/textile-editor.js" type="text/javascript"></script>
<script type="text/javascript">
document.observe('dom:loaded', function() {
TextileEditor.initialize('article_body', 'extended');
TextileEditor.initialize('article_body_excerpt', 'simple');
});
</script>

Note: in the case of this helper being called via AJAX, the output will be reduced:

<script type="text/javascript">
TextileEditor.initialize('article_body', 'extended');
TextileEditor.initialize('article_body_excerpt', 'simple');
</script>

This means that the support files must be loaded outside of the AJAX request, either via a call to this helper or the textile_editor_support() helper



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# File 'lib/textile_editor.rb', line 108

def textile_editor_initialize(*dom_ids)
  options = textile_editor_options.dup

  # extract options from last argument if it's a hash
  if dom_ids.last.is_a?(Hash)
    hash = dom_ids.last.dup
    options.merge! hash
    dom_ids.last.delete :framework
  end

  editor_ids = (@textile_editor_ids || []) + textile_extract_dom_ids(*dom_ids)
  editor_buttons = (@textile_editor_buttons || [])
  output = []
  output << textile_editor_support unless request.xhr?
  output << '<script type="text/javascript">'
  output << '/* <![CDATA[ */'
  
  if !request.xhr?
    case options[:framework]
    when :prototype
      output << %{document.observe('dom:loaded', function() \{}
    when :jquery
      output << %{$(document).ready(function() \{}
    end
  end      

  # output << %q{TextileEditor.framework = '%s';} % options[:framework].to_s
  output << editor_buttons.join("\n") if editor_buttons.any?
  editor_ids.each do |editor_id, mode|
    output << %q{TextileEditor.initialize('%s', '%s');} % [editor_id, mode || 'extended']
  end
  output << '});' unless request.xhr?

  output << '/* ]]> */'
  output << '</script>'
  output.join("\n").html_safe
end

#textile_editor_options(options = {}) ⇒ Object 



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# File 'lib/textile_editor.rb', line 46

def textile_editor_options(options={})
  (@textile_editor_options ||= { :framework => :prototype }).merge! options
end

#textile_editor_support ⇒ Object 



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# File 'lib/textile_editor.rb', line 50

def textile_editor_support
  output = []
  output << stylesheet_link_tag('textile-editor') 
  output << javascript_include_tag('textile-editor')
  output.join("\n").html_safe
end

#textile_extract_dom_ids(*dom_ids) ⇒ Object 



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# File 'lib/textile_editor.rb', line 81

def textile_extract_dom_ids(*dom_ids)
  hash = dom_ids.last.is_a?(Hash) ? dom_ids.pop : {}
  hash.inject(dom_ids) do |ids, (object, fields)|
    ids + Array(fields).map { |field| "%s_%s" % [object, field] }
  end
end