#
#--
#
# $Id: horizontal_dropdown.rb 348 2005-09-02 08:43:33Z thomas $
#
# webgen: template based static website generator
# Copyright (C) 2004 Thomas Leitner
#
# This program is free software; you can redistribute it and/or modify it under the terms of the GNU
# General Public License as published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with this program; if not,
# write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#++
#

require 'webgen/plugins/menustyles/default'

module MenuStyles

  class HorizontalDropdownMenuStyle < MenuStyles::DefaultMenuStyle

    summary "Builds a horizontal menu with CSS drop down submenus"

    register_menu_style 'horizontal-dropdown'

    CSS = "
/* START Webgen horizontal dropdown menu style */
.webgen-menu-horiz-dd ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  float: left;
}

.webgen-menu-horiz-dd ul ul {
  width: 15em;
  border: 1px solid black;
  position: absolute;
  z-index: 500;
}


.webgen-menu-horiz-dd a {
  display: block;
  margin: 0px;
  padding: 3px 3px;
  background-color: white;
}

.webgen-menu-horiz-dd li {
  position: relative;
}

.webgen-menu-horiz-dd ul ul ul {
position: absolute;
top: 0;
left: 100%;
}

.webgen-menu-horiz-dd ul ul {
  display: none;
}

.webgen-menu-horiz-dd ul li:hover > ul > ul {
  display: none;
}

.webgen-menu-horiz-dd ul li:hover > ul {
  display: block;
}
/* STOP Webgen horizontal dropdown menu style */
"

    def internal_build_menu( srcNode, menuTree )
      unless defined?( @css_added )
        Webgen::Plugin['ResourceManager'].append_data( 'webgen-css', CSS )
        @css_added = true
      end
      "<div class=\"webgen-menu-horiz-dd #{get_param('divClass')}\">#{submenu( srcNode, menuTree, 1 )}</div>"
    end

    #######
    private
    #######

    def submenu( srcNode, node, level )
      out = ''
      out = "<ul>" if level > 1
      node.each do |child|
        menu = child['node']['int:directory?'] ? submenu( srcNode, child, level + 1 ) : ''
        style, link = menu_item_details( srcNode, child['node'] )

        out << "<ul>" if level == 1
        out << "<li #{style}>#{link}"
        out << menu
        out << "</li>"
        out << "</ul>" if level == 1
      end
      out << "</ul>" if level > 1

      return out
    end

  end

end