module Watir
  # A PageContainer contains an HTML Document. In other words, it is a
  # what JavaScript calls a Window.
  module PageContainer
    include Watir::Exception

    # This method checks the currently displayed page for http errors, 404, 500 etc
    # It gets called internally by the wait method, so a user does not need to call it explicitly

    def check_for_http_error
      # check for IE7
      n = self.document.invoke('parentWindow').navigator.appVersion
      m=/MSIE\s(.*?);/.match( n )
      if m and m[1] =='7.0'
        if m = /HTTP (\d\d\d.*)/.match( self.title )
          raise NavigationException, m[1]
        end
      else
        # assume its IE6
        url = self.document.location.href
        if /shdoclc.dll/.match(url)
          m = /id=IEText.*?>(.*?)</i.match(self.html)
          raise NavigationException, m[1] if m
        end
      end
      false
    end

    # The HTML Page
    def page
      document.documentelement
    end

    private :page

    # The HTML of the current page
    def html
      page.outerhtml
    end

    # The url of the page object.
    def url
      page.document.location.href
    end

    # The text of the current page
    def text
      page.innertext.strip
    end

    def click_no_wait(element)
      ruby_code = "require 'rubygems';" <<
              "require '#{File.expand_path(File.dirname(__FILE__))}/core';" <<
              "#{element}.click!"
      system(spawned_click_no_wait_command(ruby_code))
    end

    def spawned_click_no_wait_command(command)
      unless $DEBUG
        "start rubyw -e #{command.inspect}"
      else
        puts "#click_no_wait command:"
        command = "ruby -e #{command.inspect}"
        puts command
        command
      end
    end

    private :spawned_click_no_wait_command

    def set_container container
      @container = container
      @page_container = self
    end

    # This method is used to display the available html frames that Internet Explorer currently has loaded.
    # This method is usually only used for debugging test scripts.
    def show_frames
      if allFrames = document.frames
        count = allFrames.length
        puts "there are #{count} frames"
        for i in 0..count-1 do
          begin
            fname = allFrames.item(i).name.to_s
            puts "frame  index: #{i + 1} name: #{fname}"
          rescue => e
            if e.to_s.match(/Access is denied/)
              puts "frame  index: #{i + 1} Access Denied, see http://wiki.openqa.org/display/WTR/FAQ#access-denied"
            end
          end
        end
      else
        puts "no frames"
      end
    end

    # Search the current page for specified text or regexp.
    # Returns the index if the specified text was found.
    # Returns matchdata object if the specified regexp was found.
    #
    # *Deprecated*
    # Instead use
    #   IE#text.include? target
    # or
    #   IE#text.match target
    def contains_text(target)
      if target.kind_of? Regexp
        self.text.match(target)
      elsif target.kind_of? String
        self.text.index(target)
      else
        raise ArgumentError, "Argument #{target} should be a string or regexp."
      end
    end

  end # module
end