From dd7ce2e9558f213d3084aeb750da2cdd3199d3e2 Mon Sep 17 00:00:00 2001 From: Victor Häggqvist Date: Sat, 7 Jun 2014 16:28:14 +0200 Subject: initial js --- js/imagelightbox.js | 312 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 312 insertions(+) create mode 100644 js/imagelightbox.js diff --git a/js/imagelightbox.js b/js/imagelightbox.js new file mode 100644 index 0000000..3e1b679 --- /dev/null +++ b/js/imagelightbox.js @@ -0,0 +1,312 @@ +/!* + * By Osvaldas Valutis, www.osvaldas.info + * Available for use under the MIT License + */ + +;( function( $, window, document, undefined ) +{ + 'use strict'; + + var cssTransitionSupport = function() + { + var s = document.body || document.documentElement, s = s.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 ) + { + var options = {}, 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 ) + { + var 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 ), + + targets = $([]), + target = $(), + image = $(), + imageWidth = 0, + imageHeight = 0, + swipeDiff = 0, + inProgress = false, + + isTargetValid = function( element ) + { + return $( element ).prop( 'tagName' ).toLowerCase() == 'a' && ( new RegExp( '\.(' + options.allowedTypes + ')$', 'i' ) ).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; + + 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 = $( '' ) + .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 ); + $( '' ).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 ); -- cgit v1.2.3