Class: DomSection

Inherits:
BaseSection show all
Defined in:
lib/volt/page/targets/dom_section.rb

Instance Method Summary collapse

Constructor Details

#initialize(binding_name) ⇒ DomSection

Returns a new instance of DomSection.



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# File 'lib/volt/page/targets/dom_section.rb', line 4

def initialize(binding_name)
  @start_node = find_by_comment("$#{binding_name}")
  @end_node = find_by_comment("$/#{binding_name}")
end

Instance Method Details

#find_by_comment(text, in_node = `document`) ⇒ Object 



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# File 'lib/volt/page/targets/dom_section.rb', line 9

def find_by_comment(text, in_node=`document`)
	node = nil

	%x{
		node = document.evaluate("//comment()[. = ' " + text + " ']", in_node, null, XPathResult.UNORDERED_NODE_ITERATOR_TYPE, null).iterateNext();
	}
	return node
end

#html=(value) ⇒ Object 



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# File 'lib/volt/page/targets/dom_section.rb', line 25

def html=(value)
  set_content_and_rezero_bindings(value, {})
end

#insert_anchor_before_end(binding_name) ⇒ Object 



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# File 'lib/volt/page/targets/dom_section.rb', line 46

def insert_anchor_before_end(binding_name)
  Element.find(@end_node).before("<!-- $#{binding_name} --><!-- $/#{binding_name} -->")
end

#nodes=(nodes) ⇒ Object

Takes in an array of dom nodes and replaces the current content with the new nodes



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# File 'lib/volt/page/targets/dom_section.rb', line 52

def nodes=(nodes)
  range = self.range()

  %x{
    range.deleteContents();

    for (var i=nodes.length-1; i >= 0; i--) {
      var node = nodes[i];

      node.parentNode.removeChild(node);
      range.insertNode(node);
    }
  }
end

#remove ⇒ Object 



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# File 'lib/volt/page/targets/dom_section.rb', line 29

def remove
  range = self.range()

  %x{
    range.deleteContents();
  }
end

#remove_anchors ⇒ Object 



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# File 'lib/volt/page/targets/dom_section.rb', line 37

def remove_anchors    
  %x{
    this.start_node.parentNode.removeChild(this.start_node);
    this.end_node.parentNode.removeChild(this.end_node);
  }
  @start_node = nil
  @end_node = nil
end

#set_content_and_rezero_bindings(html, bindings) ⇒ Object

Takes in our html and bindings, and rezero’s the comment names, and the bindings. Returns an updated bindings hash



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# File 'lib/volt/page/targets/dom_section.rb', line 69

def set_content_and_rezero_bindings(html, bindings)
	sub_nodes = nil
   temp_div = nil

   %x{
     temp_div = document.createElement('div');
     var doc = jQuery.parseHTML(html);
     
     if (doc) {
       for (var i=0;i < doc.length;i++) {
         temp_div.appendChild(doc[i]);
       }
     }
   }

   new_bindings = {}
   # Loop through the bindings, and rezero.
   bindings.each_pair do |name,binding|
     new_name = @@binding_number

     if name.cur.is_a?(String)
       if name[0..1] == 'id'
       # Find by id
         %x{
           var node = temp_div.querySelector('#' + name);
           node.setAttribute('id', 'id' +new_name);
         }
         
         new_bindings["id#{new_name}"] = binding
       else
         # Assume a fixed id
         # TODO: We should raise an exception if this id is already on the page
         new_bindings[name] = binding
       end
     else
       # Change the comment ids
       start_comment = find_by_comment("$#{name}", temp_div)
       end_comment = find_by_comment("$/#{name}", temp_div)

       %x{
         start_comment.textContent = " $" + new_name + " ";
         end_comment.textContent = " $/" + new_name + " ";
       }

       new_bindings[new_name] = binding
     end


     @@binding_number += 1
   end


   children = nil
	%x{
	  children = temp_div.childNodes;
	}
   
   # Update the nodes
   self.nodes = children
   
   %x{
     temp_div = null;
   }

	return new_bindings
end

#text=(value) ⇒ Object 



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# File 'lib/volt/page/targets/dom_section.rb', line 18

def text=(value)
  %x{
    this.$range().deleteContents();
    this.$range().insertNode(document.createTextNode(#{value}));
  }
end