fronend/plugins/light-gallery/js/lg-zoom.min.js

/*! lightgallery - v1.2.21 - 2016-06-28
* http://sachinchoolur.github.io/lightGallery/
* Copyright (c) 2016 Sachin N; Licensed Apache 2.0 */
!function(a,b,c,d){"use strict";var e={scale:1,zoom:!0,actualSize:!0,enableZoomAfter:300},f=function(c){return this.core=a(c).data("lightGallery"),this.core.s=a.extend({},e,this.core.s),this.core.s.zoom&&this.core.doCss()&&(this.init(),this.zoomabletimeout=!1,this.pageX=a(b).width()/2,this.pageY=a(b).height()/2+a(b).scrollTop()),this};f.prototype.init=function(){var c=this,d='<span id="lg-zoom-in" class="lg-icon"></span><span id="lg-zoom-out" class="lg-icon"></span>';c.core.s.actualSize&&(d+='<span id="lg-actual-size" class="lg-icon"></span>'),this.core.$outer.find(".lg-toolbar").append(d),c.core.$el.on("onSlideItemLoad.lg.tm.zoom",function(b,d,e){var f=c.core.s.enableZoomAfter+e;a("body").hasClass("lg-from-hash")&&e?f=0:a("body").removeClass("lg-from-hash"),c.zoomabletimeout=setTimeout(function(){c.core.$slide.eq(d).addClass("lg-zoomable")},f+30)});var e=1,f=function(d){var e,f,g=c.core.$outer.find(".lg-current .lg-image"),h=(a(b).width()-g.width())/2,i=(a(b).height()-g.height())/2+a(b).scrollTop();e=c.pageX-h,f=c.pageY-i;var j=(d-1)*e,k=(d-1)*f;g.css("transform","scale3d("+d+", "+d+", 1)").attr("data-scale",d),g.parent().css({left:-j+"px",top:-k+"px"}).attr("data-x",j).attr("data-y",k)},g=function(){e>1?c.core.$outer.addClass("lg-zoomed"):c.resetZoom(),1>e&&(e=1),f(e)},h=function(d,f,h,i){var j,k=f.width();j=c.core.s.dynamic?c.core.s.dynamicEl[h].width||f[0].naturalWidth||k:c.core.$items.eq(h).attr("data-width")||f[0].naturalWidth||k;var l;c.core.$outer.hasClass("lg-zoomed")?e=1:j>k&&(l=j/k,e=l||2),i?(c.pageX=a(b).width()/2,c.pageY=a(b).height()/2+a(b).scrollTop()):(c.pageX=d.pageX||d.originalEvent.targetTouches[0].pageX,c.pageY=d.pageY||d.originalEvent.targetTouches[0].pageY),g(),setTimeout(function(){c.core.$outer.removeClass("lg-grabbing").addClass("lg-grab")},10)},i=!1;c.core.$el.on("onAferAppendSlide.lg.tm.zoom",function(a,b){var d=c.core.$slide.eq(b).find(".lg-image");d.on("dblclick",function(a){h(a,d,b)}),d.on("touchstart",function(a){i?(clearTimeout(i),i=null,h(a,d,b)):i=setTimeout(function(){i=null},300),a.preventDefault()})}),a(b).on("resize.lg.zoom scroll.lg.zoom orientationchange.lg.zoom",function(){c.pageX=a(b).width()/2,c.pageY=a(b).height()/2+a(b).scrollTop(),f(e)}),a("#lg-zoom-out").on("click.lg",function(){c.core.$outer.find(".lg-current .lg-image").length&&(e-=c.core.s.scale,g())}),a("#lg-zoom-in").on("click.lg",function(){c.core.$outer.find(".lg-current .lg-image").length&&(e+=c.core.s.scale,g())}),a("#lg-actual-size").on("click.lg",function(a){h(a,c.core.$slide.eq(c.core.index).find(".lg-image"),c.core.index,!0)}),c.core.$el.on("onBeforeSlide.lg.tm",function(){e=1,c.resetZoom()}),c.core.isTouch||c.zoomDrag(),c.core.isTouch&&c.zoomSwipe()},f.prototype.resetZoom=function(){this.core.$outer.removeClass("lg-zoomed"),this.core.$slide.find(".lg-img-wrap").removeAttr("style data-x data-y"),this.core.$slide.find(".lg-image").removeAttr("style data-scale"),this.pageX=a(b).width()/2,this.pageY=a(b).height()/2+a(b).scrollTop()},f.prototype.zoomSwipe=function(){var a=this,b={},c={},d=!1,e=!1,f=!1;a.core.$slide.on("touchstart.lg",function(c){if(a.core.$outer.hasClass("lg-zoomed")){var d=a.core.$slide.eq(a.core.index).find(".lg-object");f=d.outerHeight()*d.attr("data-scale")>a.core.$outer.find(".lg").height(),e=d.outerWidth()*d.attr("data-scale")>a.core.$outer.find(".lg").width(),(e||f)&&(c.preventDefault(),b={x:c.originalEvent.targetTouches[0].pageX,y:c.originalEvent.targetTouches[0].pageY})}}),a.core.$slide.on("touchmove.lg",function(g){if(a.core.$outer.hasClass("lg-zoomed")){var h,i,j=a.core.$slide.eq(a.core.index).find(".lg-img-wrap");g.preventDefault(),d=!0,c={x:g.originalEvent.targetTouches[0].pageX,y:g.originalEvent.targetTouches[0].pageY},a.core.$outer.addClass("lg-zoom-dragging"),i=f?-Math.abs(j.attr("data-y"))+(c.y-b.y):-Math.abs(j.attr("data-y")),h=e?-Math.abs(j.attr("data-x"))+(c.x-b.x):-Math.abs(j.attr("data-x")),(Math.abs(c.x-b.x)>15||Math.abs(c.y-b.y)>15)&&j.css({left:h+"px",top:i+"px"})}}),a.core.$slide.on("touchend.lg",function(){a.core.$outer.hasClass("lg-zoomed")&&d&&(d=!1,a.core.$outer.removeClass("lg-zoom-dragging"),a.touchendZoom(b,c,e,f))})},f.prototype.zoomDrag=function(){var c=this,d={},e={},f=!1,g=!1,h=!1,i=!1;c.core.$slide.on("mousedown.lg.zoom",function(b){var e=c.core.$slide.eq(c.core.index).find(".lg-object");i=e.outerHeight()*e.attr("data-scale")>c.core.$outer.find(".lg").height(),h=e.outerWidth()*e.attr("data-scale")>c.core.$outer.find(".lg").width(),c.core.$outer.hasClass("lg-zoomed")&&a(b.target).hasClass("lg-object")&&(h||i)&&(b.preventDefault(),d={x:b.pageX,y:b.pageY},f=!0,c.core.$outer.scrollLeft+=1,c.core.$outer.scrollLeft-=1,c.core.$outer.removeClass("lg-grab").addClass("lg-grabbing"))}),a(b).on("mousemove.lg.zoom",function(a){if(f){var b,j,k=c.core.$slide.eq(c.core.index).find(".lg-img-wrap");g=!0,e={x:a.pageX,y:a.pageY},c.core.$outer.addClass("lg-zoom-dragging"),j=i?-Math.abs(k.attr("data-y"))+(e.y-d.y):-Math.abs(k.attr("data-y")),b=h?-Math.abs(k.attr("data-x"))+(e.x-d.x):-Math.abs(k.attr("data-x")),k.css({left:b+"px",top:j+"px"})}}),a(b).on("mouseup.lg.zoom",function(a){f&&(f=!1,c.core.$outer.removeClass("lg-zoom-dragging"),!g||d.x===e.x&&d.y===e.y||(e={x:a.pageX,y:a.pageY},c.touchendZoom(d,e,h,i)),g=!1),c.core.$outer.removeClass("lg-grabbing").addClass("lg-grab")})},f.prototype.touchendZoom=function(a,b,c,d){var e=this,f=e.core.$slide.eq(e.core.index).find(".lg-img-wrap"),g=e.core.$slide.eq(e.core.index).find(".lg-object"),h=-Math.abs(f.attr("data-x"))+(b.x-a.x),i=-Math.abs(f.attr("data-y"))+(b.y-a.y),j=(e.core.$outer.find(".lg").height()-g.outerHeight())/2,k=Math.abs(g.outerHeight()*Math.abs(g.attr("data-scale"))-e.core.$outer.find(".lg").height()+j),l=(e.core.$outer.find(".lg").width()-g.outerWidth())/2,m=Math.abs(g.outerWidth()*Math.abs(g.attr("data-scale"))-e.core.$outer.find(".lg").width()+l);(Math.abs(b.x-a.x)>15||Math.abs(b.y-a.y)>15)&&(d&&(-k>=i?i=-k:i>=-j&&(i=-j)),c&&(-m>=h?h=-m:h>=-l&&(h=-l)),d?f.attr("data-y",Math.abs(i)):i=-Math.abs(f.attr("data-y")),c?f.attr("data-x",Math.abs(h)):h=-Math.abs(f.attr("data-x")),f.css({left:h+"px",top:i+"px"}))},f.prototype.destroy=function(){var c=this;c.core.$el.off(".lg.zoom"),a(b).off(".lg.zoom"),c.core.$slide.off(".lg.zoom"),c.core.$el.off(".lg.tm.zoom"),c.resetZoom(),clearTimeout(c.zoomabletimeout),c.zoomabletimeout=!1},a.fn.lightGallery.modules.zoom=f}(jQuery,window,document);