Class: Celerity::Element

Inherits:
Object
  • Object
show all
Includes:
Container, Exception
Defined in:
lib/celerity/element.rb,
lib/celerity/watir_compatibility.rb

Overview

Superclass for all HTML elements.

Constant Summary collapse

TO_S_SIZE =

number of spaces that separate the property from the value in the create_string method

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HTML_401_TRANSITIONAL =

HTML 4.01 Transitional DTD

{
  :core        => [:class, :id, :style, :title],
  :cell_halign => [:align, :char, :charoff],
  :cell_valign => [:valign],
  :i18n        => [:dir, :lang],
  :event       => [:onclick, :ondblclick, :onmousedown, :onmouseup, :onmouseover,
                   :onmousemove, :onmouseout, :onkeypress, :onkeydown, :onkeyup],
  :sloppy      => [:name, :value]
}
CELLHALIGN_ATTRIBUTES = 

      
        
CELLVALIGN_ATTRIBUTES =
          
        

        

      
        
BASE_ATTRIBUTES =
          
        

        
HTML_401_TRANSITIONAL.values_at(:core, :i18n, :event, :sloppy).flatten

      
        
ATTRIBUTES =
          
        

        
BASE_ATTRIBUTES

      
        
TAGS =
          
        

        
[]

      
        
DEFAULT_HOW =
          
        

        
nil

      
    

  




  
Instance Attribute Summary collapse

  



  
  
  
Attributes included from Container

  
#browser



  
    

      Instance Method Summary
      collapse
    


    
  


  
  
  
  
  
  
  
  
  
Methods included from Container

  
#area, #areas, #button, #buttons, #cell, #cells, #check_box, #checkboxes, #container=, #contains_text, #dd, #dds, #div, #divs, #dl, #dls, #dt, #dts, #em, #ems, #file_field, #file_fields, #form, #forms, #frame, #frames, #h1, #h1s, #h2, #h2s, #h3, #h3s, #h4, #h4s, #h5, #h5s, #h6, #h6s, #hidden, #hiddens, #image, #images, #inspect, #label, #labels, #li, #link, #links, #lis, #map, #maps, #meta, #metas, #ol, #ols, #option, #p, #pre, #pres, #ps, #radio, #radios, #row, #rows, #select_list, #select_lists, #span, #spans, #strong, #strongs, #table, #tables, #tbodies, #tbody, #text_field, #text_fields, #tfoot, #tfoots, #th, #thead, #theads, #ths, #ul, #uls


  
  
  
  
  
  
  
  
  
Methods included from ShortInspect

  
#short_inspect


  
  
  
  
  
  

  
Constructor Details

  
    

  

  
    #initialize(container, *args)  ⇒ Element 
  

  

  




  

    

  This method is part of a private API.
  You should avoid using this method if possible, as it may be removed or be changed in the future.




Returns a new instance of Element.



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 36

def initialize(container, *args)
  self.container = container

  case args.size
  when 2
    @conditions = { args[0] => args[1] }
  when 1
    if args.first.is_a? Hash
      @conditions = args.first
    elsif (how = self.class::DEFAULT_HOW)
      @conditions = { how => args.first }
    else
      raise ArgumentError, "wrong number of arguments (1 for 2)"
    end
  else
    raise ArgumentError, "wrong number of arguments (#{args.size} for 2)"
  end

  @conditions.freeze
  @object = nil
end

    		
  





  




  
Dynamic Method Handling

  

    This class handles dynamic methods through the method_missing method
    
  

  
    

  

  
    #method_missing(meth, *args, &blk)  ⇒ String 
  

  

  




  

    

Dynamically get element attributes.



  





  

Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
        —
        
    

    The resulting attribute.
    

    
      
    
    • 
  



Raises:


    
  
    
  • 
      
      
        (NoMethodError)
      
      
      
        —
        
    

    if the element doesn’t support this attribute.
    

    
      
    
    • 
  



  
See Also:

  



  

    
      


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# File 'lib/celerity/element.rb', line 251

def method_missing(meth, *args, &blk)
  assert_exists

  meth = selector_to_attribute(meth)

  if self.class::ATTRIBUTES.include?(meth) || (self.class == Element && @object.hasAttribute(meth.to_s))
    return @object.getAttribute(meth.to_s)
  end
  Log.warn "Element\#method_missing calling super with #{meth.inspect}"
  super
end

    		
  





  



  

    
Instance Attribute Details

    
      
      
      

  

  
    #container  ⇒ Object  (readonly)
  

  

  




  

    

Returns the value of attribute container.



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 11

def container
  @container
end

    		
  





    
  



  

    
Instance Method Details


    
      

  

  
    #assert_exists  ⇒ Object 
  

  

  




  

    

  This method is part of a private API.
  You should avoid using this method if possible, as it may be removed or be changed in the future.




Used internally to ensure the element actually exists.



  





  

Raises:





  

    
      


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# File 'lib/celerity/element.rb', line 160

def assert_exists
  locate unless @object
  unless @object
    raise UnknownObjectException, "Unable to locate #{self.class.name[/::(.*)$/, 1]}, using #{identifier_string}"
  end
end

    		
  





    
      

  

  
    #attribute_string  ⇒ String 
  

  

  




  

    

Returns A string representation of the element’s attributes.



  





  

Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
        —
        
    

    A string representation of the element’s attributes.
    

    
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 222

def attribute_string
  assert_exists

  result = ''
  @object.getAttributes.each do |attribute|
    result << %Q{#{attribute.getName}="#{attribute.getValue}"}
  end

  result
end

    		
  





    
      

  

  
    #attribute_value(attribute)  ⇒ String 
  

  

  




  

    

Returns The value of the given attribute.



  





  
Parameters:


    
  
    
  • 
      
        The
      
      
        (String, #to_s)
      
      
      
        —
        
    

    attribute.
    

    
      
    
    • 
  




Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
        —
        
    

    The value of the given attribute.
    

    
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 135

def attribute_value(attribute)
  assert_exists
  @object.getAttribute(attribute.to_s)
end

    		
  





    
      

  

  
    #exists?  ⇒ true, false 
  

  
    Also known as:
    exist?, exists
    
  

  




  

    

Checks if the element exists.



  





  

Returns:


    
  
    
  • 
      
      
        (true, false)
      
      
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 172

def exists?
  assert_exists
  true
rescue UnknownObjectException, UnknownFrameException
  false
end

    		
  





    
      

  

  
    #fire_event(event_name)  ⇒ Object 
  

  

  




  

    

Fires the given event for this element



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 88

def fire_event(event_name)
  assert_exists
  @object.fireEvent(event_name.sub(/^on/, ''))
end

    		
  





    
      

  

  
    #focus  ⇒ Object 
  

  

  




  

    

Sets the focus to this element.



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 79

def focus
  assert_exists
  @object.focus
end

    		
  





    
      

  

  
    #javascript_object  ⇒ Object 
  

  

  




  

    

Returns a JavaScript object representing the receiver



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 116

def javascript_object
  assert_exists
  @object.getScriptObject
end

    		
  





    
      

  

  
    #locate  ⇒ Object 
  

  

  




  

    

  This method is part of a private API.
  You should avoid using this method if possible, as it may be removed or be changed in the future.




Used internally. Find the element on the page.



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 98

def locate
  @object = ElementLocator.new(@container, self.class).find_by_conditions(@conditions)
end

    		
  





    
      

  

  
    #methods(*args)  ⇒ Object 
  

  

  




  

    
      


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# File 'lib/celerity/element.rb', line 263

def methods(*args)
  ms = super
  ms += self.class::ATTRIBUTES.map { |e| e.to_s }
  ms.sort
end

    		
  





    
      

  

  
    #object  ⇒ Object 
  

  

  




  

    

Returns the HtmlUnit object backing this element



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 106

def object
  @object || locate
end

    		
  





    
      

  

  
    #parent  ⇒ Celerity::Element? 
  

  

  




  

    

Get the parent element



  





  

Returns:


    
  
    
  • 
      
      
        (Celerity::Element, nil)
      
      
      
        —
        
    

    subclass of Celerity::Element, or nil if no parent was found
    

    
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 63

def parent
  assert_exists

  obj = @object.parentNode
  until element_class = Celerity::Util.htmlunit2celerity(obj.class)
    return nil if obj.nil?
    obj = obj.parentNode
  end

  element_class.new(@container, :object, obj)
end

    		
  





    
      

  

  
    #respond_to?(meth, include_private = false)  ⇒ Boolean 
  

  

  




  

    

  





  

Returns:


    
  
    
  • 
      
      
        (Boolean)
      
      
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 269

def respond_to?(meth, include_private = false)
  meth = selector_to_attribute(meth)
  return true if self.class::ATTRIBUTES.include?(meth)
  super
end

    		
  





    
      

  

  
    #text  ⇒ String 
  

  
    Also known as:
    innerText, inner_text
    
  

  




  

    

Return a text representation of the element as it would appear in a browser.



  





  

Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
    
    • 
  



  
See Also:

  



  

    
      


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# File 'lib/celerity/element.rb', line 187

def text
  assert_exists
  @object.asText.strip # this must behave like ElementLocator
end

    		
  





    
      

  

  
    #to_s  ⇒ String 
  

  

  




  

    

Returns A string representation of the element.



  





  

Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
        —
        
    

    A string representation of the element.
    

    
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 125

def to_s
  assert_exists
  create_string(@object)
end

    		
  





    
      

  

  
    #to_xml  ⇒ String 
  

  
    Also known as:
    asXml, as_xml, html
    
  

  




  

    

Returns The normative XML representation of the element (including children).



  





  

Returns:


    
  
    
  • 
      
      
        (String)
      
      
      
        —
        
    

    The normative XML representation of the element (including children).
    

    
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 210

def to_xml
  assert_exists
  @object.asXml
end

    		
  





    
      

  

  
    #visible?  ⇒ boolean 
  

  

  




  

    

Check if the element is visible to the user or not. Note that this only takes the _style attribute_ of the element (and its parents) into account - styles from applied CSS is not considered.



  





  

Returns:


    
  
    
  • 
      
      
        (boolean)
      
      
      
    
    • 
  





  

    
      


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# File 'lib/celerity/element.rb', line 148

def visible?
  assert_exists
  @object.isDisplayed
end

    		
  





    
      

  

  
    #xpath  ⇒ Object 
  

  

  




  

    

return the canonical xpath for this element (Celerity-specific)



  





  



  

    
      


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# File 'lib/celerity/element.rb', line 237

def xpath
  assert_exists
  @object.getCanonicalXPath
end