Module: NForm::HTML

Included in:
Builder
Defined in:
lib/nform/html.rb

Overview

Helper Methods for generating HTML markup

Constant Summary collapse

VOID_ELEMENTS = 
%i|area base br col embed hr img input keygen link meta param source track wbr|
BOOL_ATTRIBUTES = 
%i|allowfullscreen async autofocus autoplay checked compact controls declare default defaultchecked defaultmuted defaultselected defer disabled draggable enabled formnovalidate hidden indeterminate inert ismap itemscope loop multiple muted nohref noresize noshade novalidate nowrap open pauseonexit readonly required reversed scoped seamless selected sortable spellcheck translate truespeed typemustmatch visible|

Instance Method Summary collapse

Instance Method Details

#attr_key(k) ⇒ Object 



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# File 'lib/nform/html.rb', line 34

def attr_key(k)
  k.is_a?(Symbol) ? k.to_s.gsub("_","-") : k
end

#attr_string(k, v) ⇒ Object 



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# File 'lib/nform/html.rb', line 26

def attr_string(k,v)
  if BOOL_ATTRIBUTES.include?(k)
    attr_key(k) if v
  else
    %Q|#{attr_key(k)}="#{v}"|
  end
end

#attrs(hash = {}) ⇒ Object 



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# File 'lib/nform/html.rb', line 19

def attrs(hash={})
  hash.delete_if{|k,v| v.nil? || v == "" }
      .map{|k,v| attr_string(k,v) }
      .compact
      .join(" ")
end

#njoin(*args) ⇒ Object 



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# File 'lib/nform/html.rb', line 46

def njoin(*args)
  args.delete_if{|a| a.nil? || a == ""}.join("\n")
end

#sjoin(*args) ⇒ Object 



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# File 'lib/nform/html.rb', line 42

def sjoin(*args)
  args.delete_if{|a| a.nil? || a == ""}.join(' ')
end

#tag(name, attributes = {}, &block) ⇒ Object

Generate an HTML Tag



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# File 'lib/nform/html.rb', line 8

def tag(name, attributes={}, &block)
  open = sjoin name, attrs(attributes)
  body = block.call if block_given?
  if VOID_ELEMENTS.include?(name.to_sym)
    raise BuilderError, "Void elements cannot have content" if body
    "<#{open}>"
  else
    "<#{open}>#{body}</#{name}>"
  end
end

#zjoin(*args) ⇒ Object 



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# File 'lib/nform/html.rb', line 38

def zjoin(*args)
  args.delete_if{|a| a.nil? || a == ""}.join('')
end