/*
**
**  GalleryView - jQuery Content Gallery Plugin
**  Author:     Jack Anderson
**  Version:    2.1 (March 14, 2010)
**  
**  Please use this development script if you intend to make changes to the
**  plugin code.  For production sites, please use jquery.galleryview-2.1-pack.js.
**  
**  See README.txt for instructions on how to markup your HTML
**
**  See CHANGELOG.txt for a review of changes and LICENSE.txt for the applicable
**  licensing information.
**
*/

//Global variable to check if window is already loaded
//Used for calling GalleryView after page has loaded
var window_loaded = false;
      
(function($){
  $.fn.galleryView = function(options) {
    var opts = $.extend($.fn.galleryView.defaults,options);
    
    var id;
    var iterator = 0;    // INT - Currently visible panel/frame
    var item_count = 0;    // INT - Total number of panels/frames
    var slide_method;    // STRING - indicator to slide entire filmstrip or just the pointer ('strip','pointer')
    var theme_path;      // STRING - relative path to theme directory
    var paused = false;    // BOOLEAN - flag to indicate whether automated transitions are active
    
  // Element dimensions
    var gallery_width;
    var gallery_height;
    var pointer_height;
    var pointer_width;
    var strip_width;
    var strip_height;
    var wrapper_width;
    var f_frame_width;
    var f_frame_height;
    var frame_caption_size = 20;
    var gallery_padding;
    var filmstrip_margin;
    var filmstrip_orientation;
    
    
  // Arrays used to scale frames and panels
    var frame_img_scale = {};
    var panel_img_scale = {};
    var img_h = {};
    var img_w = {};
    
  // Flag indicating whether to scale panel images
    var scale_panel_images = true;
    
    var panel_nav_displayed = false;
    
  // Define jQuery objects for reuse
    var j_gallery;
    var j_filmstrip;
    var j_frames;
    var j_frame_img_wrappers;
    var j_panels;
    var j_pointer;
    
    
/*
**  Plugin Functions
*/

  /*
  **  showItem(int)
  **    Transition from current frame to frame i (1-based index)
  */
    function showItem(i) {
      // Disable next/prev buttons until transition is complete
      // This prevents overlapping of animations
      $('.nav-next-overlay',j_gallery).unbind('click');
      $('.nav-prev-overlay',j_gallery).unbind('click');
      $('.nav-next',j_gallery).unbind('click');
      $('.nav-prev',j_gallery).unbind('click');
      j_frames.unbind('click');
      
      if(opts.show_filmstrip) {
        // Fade out all frames
        j_frames.removeClass('current').find('img').stop().animate({
          'opacity':opts.frame_opacity
        },opts.transition_speed);
        // Fade in target frame
        j_frames.eq(i).addClass('current').find('img').stop().animate({
          'opacity':1.0
        },opts.transition_speed);
      }
      
      //If necessary, fade out all panels while fading in target panel
      if(opts.show_panels && opts.fade_panels) {
        j_panels.fadeOut(opts.transition_speed).eq(i%item_count).fadeIn(opts.transition_speed,function(){
          //If no filmstrip exists, re-bind click events to navigation buttons
          if(!opts.show_filmstrip) {
            $('.nav-prev-overlay',j_gallery).click(showPrevItem);
            $('.nav-next-overlay',j_gallery).click(showNextItem);
            $('.nav-prev',j_gallery).click(showPrevItem);
            $('.nav-next',j_gallery).click(showNextItem);    
          }
        });
      }
      
      // If gallery has a filmstrip, handle animation of frames
      if(opts.show_filmstrip) {
        // Slide either pointer or filmstrip, depending on transition method
        if(slide_method=='strip') {
          // Stop filmstrip if it's currently in motion
          j_filmstrip.stop();
          var distance;
          var diststr;
          if(filmstrip_orientation=='horizontal') {
            // Determine distance between pointer (eventual destination) and target frame
            distance = getPos(j_frames[i]).left - (getPos(j_pointer[0]).left+(pointer_width/2)-(f_frame_width/2));
            diststr = (distance>=0?'-=':'+=')+Math.abs(distance)+'px';
            
            // Animate filmstrip and slide target frame under pointer
            j_filmstrip.animate({
              'left':diststr
            },opts.transition_speed,opts.easing,function(){
              var old_i = i;
              // After transition is complete, shift filmstrip so that a sufficient number of frames
              // remain on either side of the visible filmstrip
              if(i>item_count) {
                i = i%item_count;
                iterator = i;
                j_filmstrip.css('left','-'+((f_frame_width+opts.frame_gap)*i)+'px');
              } else if (i<=(item_count-strip_size)) {
                i = (i%item_count)+item_count;
                iterator = i;
                j_filmstrip.css('left','-'+((f_frame_width+opts.frame_gap)*i)+'px');
              }
              // If the target frame has changed due to filmstrip shifting,
              // make sure new target frame has 'current' class and correct size/opacity settings
              if(old_i != i) {
                j_frames.eq(old_i).removeClass('current').find('img').css({
                  'opacity':opts.frame_opacity
                });
                j_frames.eq(i).addClass('current').find('img').css({
                  'opacity':1.0
                });
              }
              // If panels are not set to fade in/out, simply hide all panels and show the target panel
              if(!opts.fade_panels) {
                j_panels.hide().eq(i%item_count).show();
              }
              
              // Once animation is complete, re-bind click events to navigation buttons
              $('.nav-prev-overlay',j_gallery).click(showPrevItem);
              $('.nav-next-overlay',j_gallery).click(showNextItem);
              $('.nav-prev',j_gallery).click(showPrevItem);
              $('.nav-next',j_gallery).click(showNextItem);
              enableFrameClicking();
            });
          } else { // filmstrip_orientation == 'vertical'
            //Determine distance between pointer (eventual destination) and target frame
            distance = getPos(j_frames[i]).top - (getPos(j_pointer[0]).top+(pointer_height)-(f_frame_height/2));
            diststr = (distance>=0?'-=':'+=')+Math.abs(distance)+'px';
            
            // Animate filmstrip and slide target frame under pointer
            j_filmstrip.animate({
              'top':diststr
            },opts.transition_speed,opts.easing,function(){
              // After transition is complete, shift filmstrip so that a sufficient number of frames
              // remain on either side of the visible filmstrip
              var old_i = i;
              if(i>item_count) {
                i = i%item_count;
                iterator = i;
                j_filmstrip.css('top','-'+((f_frame_height+opts.frame_gap)*i)+'px');
              } else if (i<=(item_count-strip_size)) {
                i = (i%item_count)+item_count;
                iterator = i;
                j_filmstrip.css('top','-'+((f_frame_height+opts.frame_gap)*i)+'px');
              }
              //If the target frame has changed due to filmstrip shifting,
              //Make sure new target frame has 'current' class and correct size/opacity settings
              if(old_i != i) {
                j_frames.eq(old_i).removeClass('current').find('img').css({
                  'opacity':opts.frame_opacity
                });
                j_frames.eq(i).addClass('current').find('img').css({
                  'opacity':1.0
                });
              }
              // If panels are not set to fade in/out, simply hide all panels and show the target panel
              if(!opts.fade_panels) {
                j_panels.hide().eq(i%item_count).show();
              }
              
              // Once animation is complete, re-bind click events to navigation buttons
              $('.nav-prev-overlay',j_gallery).click(showPrevItem);
              $('.nav-next-overlay',j_gallery).click(showNextItem);
              $('.nav-prev',j_gallery).click(showPrevItem);
              $('.nav-next',j_gallery).click(showNextItem);
              enableFrameClicking();
            });
          }
        } else if(slide_method=='pointer') {
          // Stop pointer if it's currently in motion
          j_pointer.stop();
          // Get screen position of target frame
          var pos = getPos(j_frames[i]);
          
          if(filmstrip_orientation=='horizontal') {
            // Slide the pointer over the target frame
            j_pointer.animate({
              'left':(pos.left+(f_frame_width/2)-(pointer_width/2)+'px')
            },opts.transition_speed,opts.easing,function(){  
              if(!opts.fade_panels) {
                j_panels.hide().eq(i%item_count).show();
              }  
              $('.nav-prev-overlay',j_gallery).click(showPrevItem);
              $('.nav-next-overlay',j_gallery).click(showNextItem);
              $('.nav-prev',j_gallery).click(showPrevItem);
              $('.nav-next',j_gallery).click(showNextItem);
              enableFrameClicking();
            });
          } else {
            // Slide the pointer over the target frame
            j_pointer.animate({
              'top':(pos.top+(f_frame_height/2)-(pointer_height)+'px')
            },opts.transition_speed,opts.easing,function(){  
              if(!opts.fade_panels) {
                j_panels.hide().eq(i%item_count).show();
              }  
              $('.nav-prev-overlay',j_gallery).click(showPrevItem);
              $('.nav-next-overlay',j_gallery).click(showNextItem);
              $('.nav-prev',j_gallery).click(showPrevItem);
              $('.nav-next',j_gallery).click(showNextItem);
              enableFrameClicking();
            });
          }
        }
      
      }
    };
    
  /*
  **  extraWidth(jQuery element)
  **    Return the combined width of the border and padding to the elements left and right.
  **    If the border is non-numerical, assume zero (not ideal, will fix later)
  **    RETURNS - int
  */
    function extraWidth(el) {
      if(!el) { return 0; }
      if(el.length==0) { return 0; }
      el = el.eq(0);
      var ew = 0;
      ew += getInt(el.css('paddingLeft'));
      ew += getInt(el.css('paddingRight'));
      ew += getInt(el.css('borderLeftWidth'));
      ew += getInt(el.css('borderRightWidth'));
      return ew;
    };
    
  /*
  **  extraHeight(jQuery element)
  **    Return the combined height of the border and padding above and below the element
  **    If the border is non-numerical, assume zero (not ideal, will fix later)
  **    RETURN - int
  */
    function extraHeight(el) {
      if(!el) { return 0; }
      if(el.length==0) { return 0; }
      el = el.eq(0);
      var eh = 0;
      eh += getInt(el.css('paddingTop'));
      eh += getInt(el.css('paddingBottom'));
      eh += getInt(el.css('borderTopWidth'));
      eh += getInt(el.css('borderBottomWidth'));
      return eh;
    };
  
  /*
  **  showNextItem()
  **    Transition from current frame to next frame
  */
    function showNextItem() {
      
      // Cancel any transition timers until we have completed this function
      $(document).stopTime("transition");
      if(++iterator==j_frames.length) {iterator=0;}
      // We've already written the code to transition to an arbitrary panel/frame, so use it
      showItem(iterator);
      // If automated transitions haven't been cancelled by an option or paused on hover, re-enable them
      if(!paused) {
        $(document).everyTime(opts.transition_interval,"transition",function(){
          showNextItem();
        });
      }
    };
    
  /*
  **  showPrevItem()
  **    Transition from current frame to previous frame
  */
    function showPrevItem() {
      // Cancel any transition timers until we have completed this function
      $(document).stopTime("transition");
      if(--iterator<0) {iterator = item_count-1;}
      // We've already written the code to transition to an arbitrary panel/frame, so use it
      showItem(iterator);
      // If automated transitions haven't been cancelled by an option or paused on hover, re-enable them
      if(!paused) {
        $(document).everyTime(opts.transition_interval,"transition",function(){
          showNextItem();
        });
      }
    };
    
  /*
  **  getPos(jQuery element
  **    Calculate position of an element relative to top/left corner of gallery
  **    If the gallery bounding box itself is passed to the function, calculate position of gallery relative to top/left corner of browser window
  **     RETURNS - JSON {left: int, top: int}
  */
    function getPos(el) {
      var left = 0, top = 0;
      var el_id = el.id;
      if(el.offsetParent) {
        do {
          left += el.offsetLeft;
          top += el.offsetTop;
        } while(el = el.offsetParent);
      }
      //If we want the position of the gallery itself, return it
      if(el_id == id) {return {'left':left,'top':top};}
      //Otherwise, get position of element relative to gallery
      else {
        var gPos = getPos(j_gallery[0]);
        var gLeft = gPos.left;
        var gTop = gPos.top;
        
        return {'left':left-gLeft,'top':top-gTop};
      }
    };
  
  /*
  **  enableFrameClicking()
  **    Add an onclick event handler to each frame
  **    Exception: if a frame has an anchor tag, do not add an onlick handler
  */
    function enableFrameClicking() {
      j_frames.each(function(i){
        if($('a',this).length==0) {
          $(this).click(function(){
            // Prevent transitioning to the current frame (unnecessary)
            if(iterator!=i) {
              $(document).stopTime("transition");
              showItem(i);
              iterator = i;
              if(!paused) {
                $(document).everyTime(opts.transition_interval,"transition",function(){
                  showNextItem();
                });
              }
            }
          });
        }
      });
    };
  
  /*
  **  buildPanels()
  **    Construct gallery panels from <div class="panel"> elements
  **    NOTE - These DIVs are generated automatically from the content of the UL passed to the plugin
  */
    function buildPanels() {
      // If panel overlay content exists, add the necessary overlay background DIV
      // The overlay content and background are separate elements so the background's opacity isn't inherited by the content
      j_panels.each(function(i){
           if($('.panel-overlay',this).length>0) {
          $(this).append('<div class="overlay-background"></div>');  
        }
         });
      // If there is no filmstrip in this gallery, add navigation buttons to the panel itself
      if(!opts.show_filmstrip) {
        $('<img />').addClass('nav-next').attr('src',theme_path+opts.nav_theme+'/next.gif').appendTo(j_gallery).css({
          'position':'absolute',
          'zIndex':'1100',
          'cursor':'pointer',
          'top':((opts.panel_height-22)/2)+gallery_padding+'px',
          'right':'10px',
          'display':'none'
        }).click(showNextItem);
        $('<img />').addClass('nav-prev').attr('src',theme_path+opts.nav_theme+'/prev.gif').appendTo(j_gallery).css({
          'position':'absolute',
          'zIndex':'1100',
          'cursor':'pointer',
          'top':((opts.panel_height-22)/2)+gallery_padding+'px',
          'left':'10px',
          'display':'none'
        }).click(showPrevItem);
        
        $('<img />').addClass('nav-next-overlay').attr('src',theme_path+opts.nav_theme+'/panel-nav-next.gif').appendTo(j_gallery).css({
          'position':'absolute',
          'zIndex':'1099',
          'top':((opts.panel_height-22)/2)+gallery_padding-10+'px',
          'right':'0',
          'display':'none',
          'cursor':'pointer',
          'opacity':0.75
        }).click(showNextItem);
        
        $('<img />').addClass('nav-prev-overlay').attr('src',theme_path+opts.nav_theme+'/panel-nav-prev.gif').appendTo(j_gallery).css({
          'position':'absolute',
          'zIndex':'1099',
          'top':((opts.panel_height-22)/2)+gallery_padding-10+'px',
          'left':'0',
          'display':'none',
          'cursor':'pointer',
          'opacity':0.75
        }).click(showPrevItem);
      }
      // Set the height and width of each panel, and position it appropriately within the gallery
      j_panels.each(function(i){
        $(this).css({
          'width':(opts.panel_width-extraWidth(j_panels))+'px',
          'height':(opts.panel_height-extraHeight(j_panels))+'px',
          'position':'absolute',
          'overflow':'hidden',
          'display':'none'
        });
        switch(opts.filmstrip_position) {
          case 'top': $(this).css({
                  'top':strip_height+Math.max(gallery_padding,filmstrip_margin)+'px',
                  'left':gallery_padding+'px'
                }); break;
          case 'left': $(this).css({
                   'top':gallery_padding+'px',
                  'left':strip_width+Math.max(gallery_padding,filmstrip_margin)+'px'
                 }); break;
          default: $(this).css({'top':gallery_padding+'px','left':gallery_padding+'px'}); break;
        }
      });
      // Position each panel overlay within panel
      $('.panel-overlay',j_panels).css({
        'position':'absolute',
        'zIndex':'999',
        'width':(opts.panel_width-extraWidth($('.panel-overlay',j_panels)))+'px',
        'left':'0'
      });
      $('.overlay-background',j_panels).css({
        'position':'absolute',
        'zIndex':'998',
        'width':opts.panel_width+'px',
        'left':'0',
        'opacity':opts.overlay_opacity
      });
      if(opts.overlay_position=='top') {
        $('.panel-overlay',j_panels).css('top',0);
        $('.overlay-background',j_panels).css('top',0);
      } else {
        $('.panel-overlay',j_panels).css('bottom',0);
        $('.overlay-background',j_panels).css('bottom',0);
      }
      
      $('.panel iframe',j_panels).css({
        'width':opts.panel_width+'px',
        'height':opts.panel_height+'px',
        'border':'0'
      });
      
      // If panel images have to be scaled to fit within frame, do so and position them accordingly
      if(scale_panel_images) {
        $('img',j_panels).each(function(i){
          $(this).css({
            'height':panel_img_scale[i%item_count]*img_h[i%item_count],
            'width':panel_img_scale[i%item_count]*img_w[i%item_count],
            'position':'relative',
            'top':(opts.panel_height-(panel_img_scale[i%item_count]*img_h[i%item_count]))/2+'px',
            'left':(opts.panel_width-(panel_img_scale[i%item_count]*img_w[i%item_count]))/2+'px'
          });
        });
      }
    };
  
  /*
  **  buildFilmstrip()
  **    Construct filmstrip from <ul class="filmstrip"> element
  **    NOTE - 'filmstrip' class is automatically added to UL passed to plugin
  */
    function buildFilmstrip() {
      // Add wrapper to filmstrip to hide extra frames
      j_filmstrip.wrap('<div class="strip_wrapper"></div>');
      if(slide_method=='strip') {
        j_frames.clone().appendTo(j_filmstrip);
        j_frames.clone().appendTo(j_filmstrip);
        j_frames = $('li',j_filmstrip);
      }
      // If captions are enabled, add caption DIV to each frame and fill with the image titles
      if(opts.show_captions) {
        j_frames.append('<div class="caption"></div>').each(function(i){
          $(this).find('.caption').html($(this).find('img').attr('title'));  
          //$(this).find('.caption').html(i);    
        });
      }
      // Position the filmstrip within the gallery
      j_filmstrip.css({
        'listStyle':'none',
        'margin':'0',
        'padding':'0',
        'width':strip_width+'px',
        'position':'absolute',
        'zIndex':'900',
        'top':(filmstrip_orientation=='vertical' && slide_method=='strip'?-((f_frame_height+opts.frame_gap)*iterator):0)+'px',
        'left':(filmstrip_orientation=='horizontal' && slide_method=='strip'?-((f_frame_width+opts.frame_gap)*iterator):0)+'px',
        'height':strip_height+'px'
      });
      j_frames.css({
        'float':'left',
        'position':'relative',
        'height':f_frame_height+(opts.show_captions?frame_caption_size:0)+'px',
        'width':f_frame_width+'px',
        'zIndex':'901',
        'padding':'0',
        'cursor':'pointer'
      });
      // Set frame margins based on user options and position of filmstrip within gallery
      switch(opts.filmstrip_position) {
        case 'top': j_frames.css({
                'marginBottom':filmstrip_margin+'px',
                'marginRight':opts.frame_gap+'px'
              }); break;
        case 'bottom': j_frames.css({
                'marginTop':filmstrip_margin+'px',
                'marginRight':opts.frame_gap+'px'
              }); break;
        case 'left': j_frames.css({
                'marginRight':filmstrip_margin+'px',
                'marginBottom':opts.frame_gap+'px'
              }); break;
        case 'right': j_frames.css({
                'marginLeft':filmstrip_margin+'px',
                'marginBottom':opts.frame_gap+'px'
              }); break;
      }
      // Apply styling to individual image wrappers. These will eventually hide overflow in the case of cropped filmstrip images
      $('.img_wrap',j_frames).each(function(i){                  
        $(this).css({
          'height':Math.min(opts.frame_height,img_h[i%item_count]*frame_img_scale[i%item_count])+'px',
          'width':Math.min(opts.frame_width,img_w[i%item_count]*frame_img_scale[i%item_count])+'px',
          'position':'relative',
          'top':(opts.show_captions && opts.filmstrip_position=='top'?frame_caption_size:0)+Math.max(0,(opts.frame_height-(frame_img_scale[i%item_count]*img_h[i%item_count]))/2)+'px',
          'left':Math.max(0,(opts.frame_width-(frame_img_scale[i%item_count]*img_w[i%item_count]))/2)+'px',
          'overflow':'hidden'
        });
      });
      // Scale each filmstrip image if necessary and position it within the image wrapper
      $('img',j_frames).each(function(i){
        $(this).css({
          'opacity':opts.frame_opacity,
          'height':img_h[i%item_count]*frame_img_scale[i%item_count]+'px',
          'width':img_w[i%item_count]*frame_img_scale[i%item_count]+'px',
          'position':'relative',
          'top':Math.min(0,(opts.frame_height-(frame_img_scale[i%item_count]*img_h[i%item_count]))/2)+'px',
          'left':Math.min(0,(opts.frame_width-(frame_img_scale[i%item_count]*img_w[i%item_count]))/2)+'px'
  
        }).mouseover(function(){
          $(this).stop().animate({'opacity':1.0},300);
        }).mouseout(function(){
          //Don't fade out current frame on mouseout
          if(!$(this).parent().parent().hasClass('current')) { $(this).stop().animate({'opacity':opts.frame_opacity},300); }
        });
      });
      // Set overflow of filmstrip wrapper to hidden so as to hide frames that don't fit within the gallery
      $('.strip_wrapper',j_gallery).css({
        'position':'absolute',
        'overflow':'hidden'
      });
      // Position filmstrip within gallery based on user options
      if(filmstrip_orientation=='horizontal') {
        $('.strip_wrapper',j_gallery).css({
          'top':(opts.filmstrip_position=='top'?Math.max(gallery_padding,filmstrip_margin)+'px':opts.panel_height+gallery_padding+'px'),
          'left':((gallery_width-wrapper_width)/2)+gallery_padding+'px',
          'width':wrapper_width+'px',
          'height':strip_height+'px'
        });
      } else {
        $('.strip_wrapper',j_gallery).css({
          'left':(opts.filmstrip_position=='left'?Math.max(gallery_padding,filmstrip_margin)+'px':opts.panel_width+gallery_padding+'px'),
          'top':Math.max(gallery_padding,opts.frame_gap)+'px',
          'width':strip_width+'px',
          'height':wrapper_height+'px'
        });
      }
      // Style frame captions
      $('.caption',j_gallery).css({
        'position':'absolute',
        'top':(opts.filmstrip_position=='bottom'?f_frame_height:0)+'px',
        'left':'0',
        'margin':'0',
        'width':f_frame_width+'px',
        'padding':'0',
        'height':frame_caption_size+'px',
        'overflow':'hidden',
        'lineHeight':frame_caption_size+'px'
      });
      // Create pointer for current frame
      var pointer = $('<div></div>');
      pointer.addClass('pointer').appendTo(j_gallery).css({
         'position':'absolute',
         'zIndex':'1000',
         'width':'0px',
         'fontSize':'0px',
         'lineHeight':'0%',
         'borderTopWidth':pointer_height+'px',
         'borderRightWidth':(pointer_width/2)+'px',
         'borderBottomWidth':pointer_height+'px',
         'borderLeftWidth':(pointer_width/2)+'px',
         'borderStyle':'solid'
      });
      
      // For IE6, use predefined color string in place of transparent (IE6 bug fix, see stylesheet)
      var transColor = $.browser.msie && $.browser.version.substr(0,1)=='6' ? 'pink' : 'transparent';
      
      // If there are no panels, make pointer transparent (nothing to point to)
      // This is not the optimal solution, but we need the pointer to exist as a reference for transition animations
      if(!opts.show_panels) { pointer.css('borderColor',transColor); }
    
        switch(opts.filmstrip_position) {
          case 'top': pointer.css({
                  'bottom':(opts.panel_height-(pointer_height*2)+gallery_padding+filmstrip_margin)+'px',
                   'left':((gallery_width-wrapper_width)/2)+(slide_method=='strip'?0:((f_frame_width+opts.frame_gap)*iterator))+((f_frame_width/2)-(pointer_width/2))+gallery_padding+'px',
                  'borderBottomColor':transColor,
                  'borderRightColor':transColor,
                  'borderLeftColor':transColor
                }); break;
          case 'bottom': pointer.css({
                    'top':(opts.panel_height-(pointer_height*2)+gallery_padding+filmstrip_margin)+'px',
                     'left':((gallery_width-wrapper_width)/2)+(slide_method=='strip'?0:((f_frame_width+opts.frame_gap)*iterator))+((f_frame_width/2)-(pointer_width/2))+gallery_padding+'px',
                    'borderTopColor':transColor,
                    'borderRightColor':transColor,
                    'borderLeftColor':transColor
                  }); break;
          case 'left': pointer.css({
                  'right':(opts.panel_width-pointer_width+gallery_padding+filmstrip_margin)+'px',
                   'top':(f_frame_height/2)-(pointer_height)+(slide_method=='strip'?0:((f_frame_height+opts.frame_gap)*iterator))+gallery_padding+'px',
                  'borderBottomColor':transColor,
                  'borderRightColor':transColor,
                  'borderTopColor':transColor
                }); break;
          case 'right': pointer.css({
                  'left':(opts.panel_width-pointer_width+gallery_padding+filmstrip_margin)+'px',
                   'top':(f_frame_height/2)-(pointer_height)+(slide_method=='strip'?0:((f_frame_height+opts.frame_gap)*iterator))+gallery_padding+'px',
                  'borderBottomColor':transColor,
                  'borderLeftColor':transColor,
                  'borderTopColor':transColor
                }); break;
        }
    
      j_pointer = $('.pointer',j_gallery);
      
      // Add navigation buttons
      var navNext = $('<img />');
      navNext.addClass('nav-next').attr('src',theme_path+opts.nav_theme+'/next.gif').appendTo(j_gallery).css({
        'position':'absolute',
        'cursor':'pointer'
      }).click(showNextItem);
      var navPrev = $('<img />');
      navPrev.addClass('nav-prev').attr('src',theme_path+opts.nav_theme+'/prev.gif').appendTo(j_gallery).css({
        'position':'absolute',
        'cursor':'pointer'
      }).click(showPrevItem);
      if(filmstrip_orientation=='horizontal') {
        navNext.css({           
          'top':(opts.filmstrip_position=='top'?Math.max(gallery_padding,filmstrip_margin):opts.panel_height+filmstrip_margin+gallery_padding)+((f_frame_height-22)/2)+'px',
          'right':((gallery_width+(gallery_padding*2))/2)-(wrapper_width/2)-opts.frame_gap-22+'px'
        });
        navPrev.css({
          'top':(opts.filmstrip_position=='top'?Math.max(gallery_padding,filmstrip_margin):opts.panel_height+filmstrip_margin+gallery_padding)+((f_frame_height-22)/2)+'px',
          'left':((gallery_width+(gallery_padding*2))/2)-(wrapper_width/2)-opts.frame_gap-22+'px'
         });
      } else {
        navNext.css({           
          'left':(opts.filmstrip_position=='left'?Math.max(gallery_padding,filmstrip_margin):opts.panel_width+filmstrip_margin+gallery_padding)+((f_frame_width-22)/2)+13+'px',
          'top':wrapper_height+(Math.max(gallery_padding,opts.frame_gap)*2)+'px'
        });
        navPrev.css({
          'left':(opts.filmstrip_position=='left'?Math.max(gallery_padding,filmstrip_margin):opts.panel_width+filmstrip_margin+gallery_padding)+((f_frame_width-22)/2)-13+'px',
          'top':wrapper_height+(Math.max(gallery_padding,opts.frame_gap)*2)+'px'
        });
      }
    };
  
  /*
  **  mouseIsOverGallery(int,int)
  **    Check to see if mouse coordinates lie within borders of gallery
  **    This is a more reliable method than using the mouseover event
  **    RETURN - boolean
  */
    function mouseIsOverGallery(x,y) {    
      var pos = getPos(j_gallery[0]);
      var top = pos.top;
      var left = pos.left;
      return x > left && x < left+gallery_width+(filmstrip_orientation=='horizontal'?(gallery_padding*2):gallery_padding+Math.max(gallery_padding,filmstrip_margin)) && y > top && y < top+gallery_height+(filmstrip_orientation=='vertical'?(gallery_padding*2):gallery_padding+Math.max(gallery_padding,filmstrip_margin));        
    };
  
  /*
  **  getInt(string)
  **    Parse a string to obtain the integer value contained
  **    If the string contains no number, return zero
  **    RETURN - int
  */
    function getInt(i) {
      i = parseInt(i,10);
      if(isNaN(i)) { i = 0; }
      return i;  
    };
  
  /*
  **  buildGallery()
  **    Construct HTML and CSS for the gallery, based on user options
  */
    function buildGallery() {
      var gallery_images = opts.show_filmstrip?$('img',j_frames):$('img',j_panels);
      // For each image in the gallery, add its original dimensions and scaled dimensions to the appropriate arrays for later reference
      gallery_images.each(function(i){
        img_h[i] = this.height;
        img_w[i] = this.width;
        if(opts.frame_scale=='nocrop') {
          frame_img_scale[i] = Math.min(opts.frame_height/img_h[i],opts.frame_width/img_w[i]);
        } else {
          frame_img_scale[i] = Math.max(opts.frame_height/img_h[i],opts.frame_width/img_w[i]);
        }
        
        if(opts.panel_scale=='nocrop') {
          panel_img_scale[i] = Math.min(opts.panel_height/img_h[i],opts.panel_width/img_w[i]);
        } else {
          panel_img_scale[i] = Math.max(opts.panel_height/img_h[i],opts.panel_width/img_w[i]);
        }
      });
      
      // Size gallery based on position of filmstrip
      j_gallery.css({
        'position':'relative',
        'width':gallery_width+(filmstrip_orientation=='horizontal'?(gallery_padding*2):gallery_padding+Math.max(gallery_padding,filmstrip_margin))+'px',
        'height':gallery_height+(filmstrip_orientation=='vertical'?(gallery_padding*2):gallery_padding+Math.max(gallery_padding,filmstrip_margin))+'px'
      });
      
      // Build filmstrip if necessary
      if(opts.show_filmstrip) {
        buildFilmstrip();
        enableFrameClicking();
      }
      // Build panels if necessary
      if(opts.show_panels) {
        buildPanels();
      }
      
      // If user opts to pause on hover, or no filmstrip exists, add some mouseover functionality
      if(opts.pause_on_hover || (opts.show_panels && !opts.show_filmstrip)) {
        $(document).mousemove(function(e){
          if(mouseIsOverGallery(e.pageX,e.pageY)) {
            // If the user opts to pause on hover, kill automated transitions
            if(opts.pause_on_hover) {
              if(!paused) {
                // Pause slideshow in 500ms
                $(document).oneTime(500,"animation_pause",function(){
                  $(document).stopTime("transition");
                  paused=true;
                });
              }
            }
            // Display panel navigation on mouseover
            if(opts.show_panels && !opts.show_filmstrip && !panel_nav_displayed) {
              $('.nav-next-overlay').fadeIn('fast');
              $('.nav-prev-overlay').fadeIn('fast');
              $('.nav-next',j_gallery).fadeIn('fast');
              $('.nav-prev',j_gallery).fadeIn('fast');
              panel_nav_displayed = true;
            }
          } else {
            // If the mouse leaves the gallery, stop the pause timer and restart automated transitions
            if(opts.pause_on_hover) {
              $(document).stopTime("animation_pause");
              if(paused) {
                $(document).everyTime(opts.transition_interval,"transition",function(){
                  showNextItem();
                });
                paused = false;
              }
            }
            // Hide panel navigation
            if(opts.show_panels && !opts.show_filmstrip && panel_nav_displayed) {
              $('.nav-next-overlay').fadeOut('fast');
              $('.nav-prev-overlay').fadeOut('fast');
              $('.nav-next',j_gallery).fadeOut('fast');
              $('.nav-prev',j_gallery).fadeOut('fast');
              panel_nav_displayed = false;
            }
          }
        });
      }
      
      // Hide loading box and display gallery
      j_filmstrip.css('visibility','visible');
      j_gallery.css('visibility','visible');
      $('.loader',j_gallery).fadeOut('1000',function(){
        // Show the 'first' panel (set by opts.start_frame)
        showItem(iterator);
        // If we have more than one item, begin automated transitions
        if(item_count > 1) {
          $(document).everyTime(opts.transition_interval,"transition",function(){
            showNextItem();
          });
        }  
      });  
    };
    
  /*
  **  MAIN PLUGIN CODE
  */
    return this.each(function() {
      //Hide the unstyled UL until we've created the gallery
      $(this).css('visibility','hidden');
      
      // Wrap UL in DIV and transfer ID to container DIV
      $(this).wrap("<div></div>");
      j_gallery = $(this).parent();
      j_gallery.css('visibility','hidden').attr('id',$(this).attr('id')).addClass('gallery');
      
      // Assign filmstrip class to UL
      $(this).removeAttr('id').addClass('filmstrip');
      
      // If the transition or pause timers exist for any reason, stop them now.
      $(document).stopTime("transition");
      $(document).stopTime("animation_pause");
      
      // Save the id of the UL passed to the plugin
      id = j_gallery.attr('id');
      
      // If the UL does not contain any <div class="panel-content"> elements, we will scale the UL images to fill the panels
      scale_panel_images = $('.panel-content',j_gallery).length==0;
      
      // Define dimensions of pointer <div>
      pointer_height = opts.pointer_size;
      pointer_width = opts.pointer_size*2;
      
      // Determine filmstrip orientation (vertical or horizontal)
      // Do not show captions on vertical filmstrips (override user set option)
      filmstrip_orientation = (opts.filmstrip_position=='top'||opts.filmstrip_position=='bottom'?'horizontal':'vertical');
      if(filmstrip_orientation=='vertical') { opts.show_captions = false; }
      
      // Determine path between current page and plugin images
      // Scan script tags and look for path to GalleryView plugin
      $('script').each(function(i){
        var s = $(this);
        if(s.attr('src') && s.attr('src').match(/jquery\.galleryview/)){
          loader_path = s.attr('src').split('jquery.galleryview')[0];
          theme_path = s.attr('src').split('jquery.galleryview')[0]+'themes/';  
        }
      });
      
      // Assign elements to variables to minimize calls to jQuery
      j_filmstrip = $('.filmstrip',j_gallery);
      j_frames = $('li',j_filmstrip);
      j_frames.addClass('frame');
      
      // If the user wants panels, generate them using the filmstrip images
      if(opts.show_panels) {
        for(i=j_frames.length-1;i>=0;i--) {
          if(j_frames.eq(i).find('.panel-content').length>0) {
            j_frames.eq(i).find('.panel-content').remove().prependTo(j_gallery).addClass('panel');
          } else {
            p = $('<div>');
            p.addClass('panel');
            im = $('<img />');
            im.attr('src',j_frames.eq(i).find('img').eq(0).attr('src')).appendTo(p);
            p.prependTo(j_gallery);
            j_frames.eq(i).find('.panel-overlay').remove().appendTo(p);
          }
        }
      } else { 
        $('.panel-overlay',j_frames).remove(); 
        $('.panel-content',j_frames).remove();
      }
      
      // If the user doesn't want a filmstrip, delete it
      if(!opts.show_filmstrip) { j_filmstrip.remove(); }
      else {
        // Wrap the frame images (and links, if applicable) in container divs
        // These divs will handle cropping and zooming of the images
        j_frames.each(function(i){
          if($(this).find('a').length>0) {
            $(this).find('a').wrap('<div class="img_wrap"></div>');
          } else {
            $(this).find('img').wrap('<div class="img_wrap"></div>');  
          }
        });
        j_frame_img_wrappers = $('.img_wrap',j_frames);
      }
      
      j_panels = $('.panel',j_gallery);
      
      if(!opts.show_panels) {
        opts.panel_height = 0;
        opts.panel_width = 0;
      }
      
      
      // Determine final frame dimensions, accounting for user-added padding and border
      f_frame_width = opts.frame_width+extraWidth(j_frame_img_wrappers);
      f_frame_height = opts.frame_height+extraHeight(j_frame_img_wrappers);
      
      // Number of frames in filmstrip
      item_count = opts.show_panels?j_panels.length:j_frames.length;
      
      // Number of frames that can display within the gallery block
      // 64 = width of block for navigation button * 2 + 20
      if(filmstrip_orientation=='horizontal') {
        strip_size = opts.show_panels?Math.floor((opts.panel_width-((opts.frame_gap+22)*2))/(f_frame_width+opts.frame_gap)):Math.min(item_count,opts.filmstrip_size); 
      } else {
        strip_size = opts.show_panels?Math.floor((opts.panel_height-(opts.frame_gap+22))/(f_frame_height+opts.frame_gap)):Math.min(item_count,opts.filmstrip_size);
      }
      
      // Determine animation method for filmstrip
      // If more items than strip size, slide filmstrip
      // Otherwise, slide pointer
      if(strip_size >= item_count) {
        slide_method = 'pointer';
        strip_size = item_count;
      }
      else {slide_method = 'strip';}
      
      iterator = (strip_size<item_count?item_count:0)+opts.start_frame-1;
      
      // Determine dimensions of various gallery elements
      filmstrip_margin = (opts.show_panels?getInt(j_filmstrip.css('marginTop')):0);
      j_filmstrip.css('margin','0px');
      
      if(filmstrip_orientation=='horizontal') {
        // Width of gallery block
        gallery_width = opts.show_panels?opts.panel_width:(strip_size*(f_frame_width+opts.frame_gap))+44+opts.frame_gap;
        
        // Height of gallery block = screen + filmstrip + captions (optional)
        gallery_height = (opts.show_panels?opts.panel_height:0)+(opts.show_filmstrip?f_frame_height+filmstrip_margin+(opts.show_captions?frame_caption_size:0):0);
      } else {
        // Width of gallery block
        gallery_height = opts.show_panels?opts.panel_height:(strip_size*(f_frame_height+opts.frame_gap))+22;
        
        // Height of gallery block = screen + filmstrip + captions (optional)
        gallery_width = (opts.show_panels?opts.panel_width:0)+(opts.show_filmstrip?f_frame_width+filmstrip_margin:0);
      }
      
      // Width of filmstrip
      if(filmstrip_orientation=='horizontal') {
        if(slide_method == 'pointer') {strip_width = (f_frame_width*item_count)+(opts.frame_gap*(item_count));}
        else {strip_width = (f_frame_width*item_count*3)+(opts.frame_gap*(item_count*3));}
      } else {
        strip_width = (f_frame_width+filmstrip_margin);
      }
      if(filmstrip_orientation=='horizontal') {
        strip_height = (f_frame_height+filmstrip_margin+(opts.show_captions?frame_caption_size:0));  
      } else {
        if(slide_method == 'pointer') {strip_height = (f_frame_height*item_count+opts.frame_gap*(item_count));}
        else {strip_height = (f_frame_height*item_count*3)+(opts.frame_gap*(item_count*3));}
      }
      
      // Width of filmstrip wrapper (to hide overflow)
      wrapper_width = ((strip_size*f_frame_width)+((strip_size-1)*opts.frame_gap));
      wrapper_height = ((strip_size*f_frame_height)+((strip_size-1)*opts.frame_gap));

      
      gallery_padding = getInt(j_gallery.css('paddingTop'));
      j_gallery.css('padding','0px');

      // Place loading box over gallery until page loads
      galleryPos = getPos(j_gallery[0]);
      $('<div>').addClass('loader').css({
        'position':'absolute',
        'zIndex':'32666',
        'opacity':1,
        'top':'0px',
        'left':'0px',
        'width':gallery_width+(filmstrip_orientation=='horizontal'?(gallery_padding*2):gallery_padding+Math.max(gallery_padding,filmstrip_margin))+'px',
        'height':gallery_height+(filmstrip_orientation=='vertical'?(gallery_padding*2):gallery_padding+Math.max(gallery_padding,filmstrip_margin))+'px'
      }).appendTo(j_gallery);
          
      // Don't call the buildGallery function until the window is loaded
      // NOTE - lazy way of waiting until all images are loaded, may find a better solution for future versions
      if(!window_loaded) {
        $(window).load(function(){
          window_loaded = true;
          buildGallery();
        });
      } else {
        buildGallery();
      }
          
    });
  };
  
/*
**  GalleryView options and default values
*/
  $.fn.galleryView.defaults = {
    
    show_panels: true,          //BOOLEAN - flag to show or hide panel portion of gallery
    show_filmstrip: true,        //BOOLEAN - flag to show or hide filmstrip portion of gallery
    
    panel_width: 600,          //INT - width of gallery panel (in pixels)
    panel_height: 400,          //INT - height of gallery panel (in pixels)
    frame_width: 60,          //INT - width of filmstrip frames (in pixels)
    frame_height: 40,          //INT - width of filmstrip frames (in pixels)
    
    start_frame: 1,            //INT - index of panel/frame to show first when gallery loads
    filmstrip_size: 3,          
    transition_speed: 800,        //INT - duration of panel/frame transition (in milliseconds)
    transition_interval: 4000,      //INT - delay between panel/frame transitions (in milliseconds)
    
    overlay_opacity: 0.7,        //FLOAT - transparency for panel overlay (1.0 = opaque, 0.0 = transparent)
    frame_opacity: 0.3,          //FLOAT - transparency of non-active frames (1.0 = opaque, 0.0 = transparent)
    
    pointer_size: 8,          //INT - Height of frame pointer (in pixels)
    
    nav_theme: 'dark',          //STRING - name of navigation theme to use (folder must exist within 'themes' directory)
    easing: 'swing',          //STRING - easing method to use for animations (jQuery provides 'swing' or 'linear', more available with jQuery UI or Easing plugin)
    
    filmstrip_position: 'bottom',    //STRING - position of filmstrip within gallery (bottom, top, left, right)
    overlay_position: 'bottom',      //STRING - position of panel overlay (bottom, top, left, right)
    
    panel_scale: 'nocrop',        //STRING - cropping option for panel images (crop = scale image and fit to aspect ratio determined by panel_width and panel_height, nocrop = scale image and preserve original aspect ratio)
    frame_scale: 'crop',        //STRING - cropping option for filmstrip images (same as above)
    
    frame_gap: 5,            //INT - spacing between frames within filmstrip (in pixels)
    
    show_captions: false,        //BOOLEAN - flag to show or hide frame captions
    fade_panels: true,          //BOOLEAN - flag to fade panels during transitions or swap instantly
    pause_on_hover: false        //BOOLEAN - flag to pause slideshow when user hovers over the gallery
  };
})(jQuery);