sftouchscreen.js

/*
 * sf-Touchscreen v1.3b - Provides touchscreen compatibility for the jQuery Superfish plugin.
 *
 * Developer's note:
 * Built as a part of the Superfish project for Drupal (http://drupal.org/project/superfish)
 * Found any bug? have any cool ideas? contact me right away! http://drupal.org/user/619294/contact
 *
 * jQuery version: 1.7 or higher.
 *
 * Dual licensed under the MIT and GPL licenses:
 *  http://www.opensource.org/licenses/mit-license.php
 *  http://www.gnu.org/licenses/gpl.html
 */

(function($){
  $.fn.sftouchscreen = function(options){
    options = $.extend({
      mode: 'inactive',
      breakpoint: 768,
      breakpointUnit: 'px',
      useragent: '',
      behaviour: 2,
      disableHover: false
    }, options);

    function activate(menu){
      var eventHandler = (('ontouchstart' in window) || (window.DocumentTouch && document instanceof DocumentTouch)) ? ['click touchstart','mouseup touchend'] : ['click','mouseup'];
      // Select hyperlinks from parent menu items.
      menu.find('li:has(ul)').children('a,span.nolink').each(function(){
        var item = $(this),
        parent = item.closest('li');
        if (options.disableHover){
          parent.off('mouseenter mouseleave');
        }
        if (options.behaviour == 2){
          if (parent.children('a.menuparent,span.nolink.menuparent').length > 0 && parent.children('ul').children('.sf-clone-parent').length == 0){
            var
            // Cloning the hyperlink of the parent menu item.
            cloneLink = parent.children('a.menuparent').clone(),
            // Wrapping the hyerplinks in <li>.
            cloneLink = $('<li class="sf-clone-parent" />').html(cloneLink);
            // Removing unnecessary stuff.
            cloneLink.find('.sf-sub-indicator').remove(),
            // Adding a helper class and attaching them to the sub-menus.
            parent.children('ul').addClass('sf-has-clone-parent').prepend(cloneLink);
          }
        }
        // No .toggle() here as it's not possible to reset it.
        item.on(eventHandler[0], function(event){
          // Already clicked?
          if (item.hasClass('sf-clicked')){
            // Depending on the preferred behaviour, either proceed to the URL.
            if (options.behaviour == 0){
              url = item.attr('href');
              if (typeof(url) != 'undefined'){
                window.location = url;
              }
            }
            // or collapse the sub-menu.
            else if (options.behaviour == 1 || options.behaviour == 2){
              event.preventDefault();
              item.removeClass('sf-clicked');
              parent.hideSuperfishUl().find('a,span.nolink').removeClass('sf-clicked');
            }
          }
          // Prevent the default action otherwise.
          else {
            event.preventDefault();
            item.addClass('sf-clicked');
            parent.showSuperfishUl().siblings('li:has(ul)').hideSuperfishUl().find('.sf-clicked').removeClass('sf-clicked');
          }
        });
      });

      $(document).on(eventHandler[1], function(event){
        if (menu.not(event.target) && menu.has(event.target).length === 0){
          menu.find('.sf-clicked').removeClass('sf-clicked');
          menu.find('li:has(ul)').hideSuperfishUl();
        }
      });
    }
    // Return original object to support chaining.
    // This is not necessary actually because of the way the module uses these plugins.
    for (var b = 0; b < this.length; b++) {
      var menu = $(this).eq(b),
      mode = options.mode;
      // The rest is crystal clear, isn't it? :)
      if (mode == 'always_active'){
        activate(menu);
      }
      else if (mode == 'window_width'){
        var breakpoint = (options.breakpointUnit == 'em') ? (options.breakpoint * parseFloat($('body').css('font-size'))) : options.breakpoint,
        windowWidth = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
        timer;
        if ((typeof Modernizr === 'undefined' || typeof Modernizr.mq !== 'function') && windowWidth < breakpoint){
          activate(menu);
        }
        else if (typeof Modernizr !== 'undefined' && typeof Modernizr.mq === 'function' && Modernizr.mq('(max-width:' + (breakpoint - 1) + 'px)')) {
          activate(menu);
        }
        $(window).resize(function(){
          clearTimeout(timer);
          timer = setTimeout(function(){
            var windowWidth = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
            if ((typeof Modernizr === 'undefined' || typeof Modernizr.mq !== 'function') && windowWidth < breakpoint){
              activate(menu);
            }
            else if (typeof Modernizr !== 'undefined' && typeof Modernizr.mq === 'function' && Modernizr.mq('(max-width:' + (breakpoint - 1) + 'px)')) {
              activate(menu);
            }
          }, 50);
        });
      }
      else if (mode == 'useragent_custom'){
        if (options.useragent != ''){
          var ua = RegExp(options.useragent, 'i');
          if (navigator.userAgent.match(ua)){
            activate(menu);
          }
        }
      }
      else if (mode == 'useragent_predefined' && navigator.userAgent.match(/(android|bb\d+|meego)|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i)){
        activate(menu);
      }
    }
    return this;
  }
})(jQuery);