class RubyCheerio

Attributes

html[RW]

This creates an attribute readers and writers needed for the instance variables.

text[RW]

This creates an attribute readers and writers needed for the instance variables.

Public Class Methods

new(html=nil) click to toggle source

This method defines the instance of a RubyCheerio object with attributes like text, html and if an argument is not passed, it throws an ArgumentError

# File lib/ruby-cheerio.rb, line 15
def initialize html=nil
        if valid_args? html
                if html.instance_of? Nokogiri::HTML::Document
                        @html_nokogiri = html
                elsif html.instance_of? String and !html.empty?
                        html = html.strip
                        @html_nokogiri = Nokogiri::HTML(html)
                end
                @text = @html_nokogiri.text 
                @html = Nokogiri::HTML(@html_nokogiri.to_html).css('body').inner_html
        end
end

Public Instance Methods

find(selector=nil) click to toggle source

This method can find an element using element-name, class-name, id-name or all together. This works like finding elements using jQuery styled selectors.

# File lib/ruby-cheerio.rb, line 31
def find selector=nil
        if valid_args? selector
                elements_list = @html_nokogiri.css(selector).to_a.map{|e| self.class.new(e.to_html)}
                if !elements_list.nil?
                        return elements_list
                else
                        return nil
                end
        end
end

prop(selector, attribute) click to toggle source

This method can return the property of an element, which is selected using the selector being passed.

# File lib/ruby-cheerio.rb, line 45
def prop(selector, attribute)
        if valid_args?(selector, attribute)
                element = @html_nokogiri.css(selector)
                if element.instance_of? Nokogiri::XML::NodeSet
                        return element[0][attribute]
                elsif element.instance_of? Nokogiri::XML::Element
                        return element[attribute]
                else
                        return nil
                end
        end
end

Private Instance Methods

valid_args?(*args) click to toggle source

This is a private method used to validate the argument being passed.

# File lib/ruby-cheerio.rb, line 62
def valid_args? *args
        args.each do |arg|
                raise ArgumentError.new('Invalid Argument') if arg.nil? or (arg.instance_of? String and arg.strip.empty?)
        end
        return true
end