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1 files changed, 332 insertions, 0 deletions

diff --git a/js/touch-imagelightbox.js b/js/touch-imagelightbox.js
new file mode 100644
index 0000000..d82b133
--- /dev/null
+++ b/js/touch-imagelightbox.js
@@ -0,0 +1,332 @@
+/*jslint browser: true*/
+;( function( $, window, document, undefined ) {
+  'use strict';
+  var options,
+  cssTransitionSupport = function() {
+      var d = document.body || document.documentElement, s = d.style;
+      if ( s.WebkitTransition === '' )
+        return '-webkit-';
+      if ( s.MozTransition === '' )
+        return '-moz-';
+      if ( s.OTransition === '' )
+        return '-o-';
+      if ( s.transition === '' )
+        return '';
+      return false;
+    },
+
+    isCssTransitionSupport = cssTransitionSupport() === false ? false : true,
+
+    cssTransitionTranslateX = function( element, positionX, speed ) {
+      options = {};
+      var prefix = cssTransitionSupport();
+      options[ prefix + 'transform' ]  = 'translateX(' + positionX + ')';
+      options[ prefix + 'transition' ] = prefix + 'transform ' + speed + 's linear';
+      element.css( options );
+    },
+
+    hasTouch  = ( 'ontouchstart' in window ),
+    hasPointers = window.navigator.pointerEnabled || window.navigator.msPointerEnabled,
+    wasTouched  = function( event ) {
+      if( hasTouch )
+        return true;
+
+      if( !hasPointers || typeof event === 'undefined' || typeof event.pointerType === 'undefined' )
+        return false;
+
+      if( typeof event.MSPOINTER_TYPE_MOUSE !== 'undefined' ) {
+        if( event.MSPOINTER_TYPE_MOUSE !== event.pointerType )
+          return true;
+      } else {
+        if( event.pointerType !== 'mouse' )
+          return true;
+      }
+
+      return false;
+    };
+
+  $.fn.imageLightbox = function( options ) {
+    options = $.extend(
+             {
+              selector:       'id="imagelightbox"',
+              allowedTypes:   'png|jpg|jpeg|gif',
+              animationSpeed: 250,
+              preloadNext:    true,
+              enableKeyboard: true,
+              quitOnEnd:      false,
+              quitOnImgClick: false,
+              quitOnDocClick: true,
+              onStart:        false,
+              onEnd:          false,
+              onLoadStart:    false,
+              onLoadEnd:      false
+             },
+             options);
+
+      var targets = $([]),
+      target = $(),
+      image = $(),
+      imageWidth = 0,
+      imageHeight = 0,
+      swipeDiff = 0,
+      inProgress = false,
+
+      isTargetValid = function( element ) {
+        this.regexValidObject = /(\.(' + options.allowedTypes + ')$)/;
+        return $( element ).prop( 'tagName' ).toLowerCase() === 'a' && this.regexValidObject.test($(element).attr('href') );
+      },
+
+      setImage = function() {
+        if( !image.length ) return false;
+
+        var screenWidth = $( window ).width() * 0.8,
+        screenHeight = $( window ).height() * 0.9,
+        tmpImage = new Image();
+
+        tmpImage.src  = image.attr( 'src' );
+        tmpImage.onload = function() {
+          imageWidth   = tmpImage.width;
+          imageHeight  = tmpImage.height;
+
+          if( imageWidth > screenWidth || imageHeight > screenHeight ) {
+            var ratio  = imageWidth / imageHeight > screenWidth / screenHeight ? imageWidth / screenWidth : imageHeight / screenHeight;
+            imageWidth  /= ratio;
+            imageHeight /= ratio;
+          }
+
+          image.css(
+            {
+              'width': imageWidth + 'px',
+              'height': imageHeight + 'px',
+              'top': ( $( window ).height() - imageHeight ) / 2 + 'px',
+              'left': ( $( window ).width() - imageWidth ) / 2 + 'px'
+            }
+          );
+        };
+      },
+
+      loadImage = function( direction ) {
+        if( inProgress ) return false;
+
+        direction = typeof direction === 'undefined' ? false : direction === 'left' ? 1 : -1;
+
+        // BIG if
+        if( image.length ) {
+          if( direction !== false &&
+            ( targets.length < 2 ||
+              ( options.quitOnEnd === true &&
+                (
+                  ( direction === -1 &&
+                    targets.index( target ) === 0
+                  ) ||
+                  ( direction === 1 &&
+                    targets.index( target ) === targets.length - 1
+                   ) ) ) )
+            )
+          {
+            quitLightbox();
+            return false;
+          }
+          var params = { 'opacity': 0 };
+          if( isCssTransitionSupport ){
+            cssTransitionTranslateX( image, ( 100 * direction ) - swipeDiff + 'px', options.animationSpeed / 1000 );
+          } else {
+            params.left = parseInt( image.css( 'left' ) ) + 100 * direction + 'px';
+          }
+          image.animate( params, options.animationSpeed, function(){ removeImage(); });
+          swipeDiff = 0;
+        }
+
+        inProgress = true;
+        if( options.onLoadStart !== false ) options.onLoadStart();
+
+        setTimeout( function() {
+          image = $( '<img ' + options.selector + ' />' )
+          .attr( 'src', target.attr( 'href' ) )
+          .load( function()
+          {
+            image.appendTo( 'body' );
+            setImage();
+
+            var params = { 'opacity': 1 };
+
+            image.css( 'opacity', 0 );
+            if( isCssTransitionSupport )
+            {
+              cssTransitionTranslateX( image, -100 * direction + 'px', 0 );
+              setTimeout( function(){
+                cssTransitionTranslateX( image, 0 + 'px', options.animationSpeed / 1000 );
+              }, 50 );
+            }
+            else
+            {
+              var imagePosLeft = parseInt( image.css( 'left' ) );
+              params.left = imagePosLeft + 'px';
+              image.css( 'left', imagePosLeft - 100 * direction + 'px' );
+            }
+
+            image.animate( params, options.animationSpeed, function()
+            {
+              inProgress = false;
+              if( options.onLoadEnd !== false ) options.onLoadEnd();
+            });
+            if( options.preloadNext )
+            {
+              var nextTarget = targets.eq( targets.index( target ) + 1 );
+              if( !nextTarget.length ) nextTarget = targets.eq( 0 );
+              $( '<img />' ).attr( 'src', nextTarget.attr( 'href' ) ).load();
+            }
+          })
+          .error( function() {
+            if( options.onLoadEnd !== false )
+              options.onLoadEnd();
+          });
+
+          var swipeStart   = 0,
+              swipeEnd   = 0,
+              imagePosLeft = 0;
+
+          image.on( hasPointers ? 'pointerup MSPointerUp' : 'click', function( e ) {
+            e.preventDefault();
+            if( options.quitOnImgClick ) {
+              quitLightbox();
+              return false;
+            }
+
+            if( wasTouched( e.originalEvent ) )
+             return true;
+
+            var posX = ( e.pageX || e.originalEvent.pageX ) - e.target.offsetLeft;
+            target = targets.eq( targets.index( target ) - ( imageWidth / 2 > posX ? 1 : -1 ) );
+
+            if( !target.length )
+              target = targets.eq( imageWidth / 2 > posX ? targets.length : 0 );
+
+            loadImage( imageWidth / 2 > posX ? 'left' : 'right' );
+          })
+          .on( 'touchstart pointerdown MSPointerDown', function( e ) {
+            if( !wasTouched( e.originalEvent ) || options.quitOnImgClick )
+             return true;
+            if( isCssTransitionSupport )
+             imagePosLeft = parseInt( image.css( 'left' ) );
+
+            swipeStart = e.originalEvent.pageX || e.originalEvent.touches[ 0 ].pageX;
+          })
+          .on( 'touchmove pointermove MSPointerMove', function( e ) {
+            if( !wasTouched( e.originalEvent ) || options.quitOnImgClick )
+             return true;
+
+            e.preventDefault();
+            swipeEnd = e.originalEvent.pageX || e.originalEvent.touches[ 0 ].pageX;
+            swipeDiff = swipeStart - swipeEnd;
+
+            if( isCssTransitionSupport )
+             cssTransitionTranslateX( image, -swipeDiff + 'px', 0 );
+            else
+             image.css( 'left', imagePosLeft - swipeDiff + 'px' );
+          })
+          .on( 'touchend touchcancel pointerup MSPointerUp', function( e ) {
+            if( !wasTouched( e.originalEvent ) || options.quitOnImgClick )
+              return true;
+            if( Math.abs( swipeDiff ) > 50 ) {
+              target = targets.eq( targets.index( target ) - ( swipeDiff < 0 ? 1 : -1 ) );
+
+              if( !target.length )
+                target = targets.eq( swipeDiff < 0 ? targets.length : 0 );
+              loadImage( swipeDiff > 0 ? 'right' : 'left' );
+            } else {
+              if( isCssTransitionSupport )
+                cssTransitionTranslateX( image, 0 + 'px', options.animationSpeed / 1000 );
+              else
+                image.animate({ 'left': imagePosLeft + 'px' }, options.animationSpeed / 2 );
+            }
+          });
+
+        }, options.animationSpeed + 100 );
+      },
+
+      removeImage = function() {
+        if( !image.length )
+          return false;
+        image.remove();
+        image = $();
+      },
+
+      quitLightbox = function() {
+        if( !image.length )
+          return false;
+        image.animate({ 'opacity': 0 }, options.animationSpeed, function() {
+          removeImage();
+          inProgress = false;
+          if( options.onEnd !== false )
+            options.onEnd();
+        });
+      };
+
+    $( window ).on( 'resize', setImage );
+
+    if( options.quitOnDocClick ) {
+      $( document ).on( hasTouch ? 'touchend' : 'click', function( e ) {
+        if( image.length && !$( e.target ).is( image ) ) quitLightbox();
+      });
+    }
+
+    if( options.enableKeyboard ) {
+      $( document ).on( 'keyup', function( e ) {
+        if( !image.length )
+          return true;
+
+        e.preventDefault();
+
+        if( e.keyCode === 27 )
+          quitLightbox();
+
+        if( e.keyCode === 37 || e.keyCode === 39 ) {
+          target = targets.eq( targets.index( target ) - ( e.keyCode === 37 ? 1 : -1 ) );
+
+          if( !target.length )
+            target = targets.eq( e.keyCode === 37 ? targets.length : 0 );
+
+          loadImage( e.keyCode === 37 ? 'left' : 'right' );
+        }
+      });
+    }
+
+    $( document ).on( 'click', this.selector, function( e ) {
+      if( !isTargetValid( this ) )
+        return true;
+      e.preventDefault();
+
+      if( inProgress )
+        return false;
+      inProgress = false;
+
+      if( options.onStart !== false )
+        options.onStart();
+      target = $( this );
+      loadImage();
+    });
+
+    this.each( function() {
+      if( !isTargetValid( this ) ) return true;
+      targets = targets.add( $( this ) );
+    });
+
+    this.switchImageLightbox = function( index ) {
+      var tmpTarget = targets.eq( index );
+      if( tmpTarget.length ) {
+        var currentIndex = targets.index( target );
+        target = tmpTarget;
+        loadImage( index < currentIndex ? 'left' : 'right' );
+      }
+      return this;
+    };
+
+    this.quitImageLightbox = function() {
+      quitLightbox();
+      return this;
+    };
+
+    return this;
+  };
+})( jQuery, window, document );