www.gusucode.com > 简洁自适应响应式电子产品类企业网站织梦模板（自适应手机版）(demo113) > 简洁自适应响应式电子产品类企业网站织梦模板（自适应手机版）(demo113)/www7/style/js/lg-zoom.min.js

    /*! lightgallery - v1.2.0 - 2015-08-26
* http://sachinchoolur.github.io/lightGallery/
* Copyright (c) 2015 Sachin N; Licensed Apache 2.0 */
!function(a,b,c,d){"use strict";var e={scale:1,zoom:!0,enableZoomAfter:300},f=function(b){return this.core=a(b).data("lightGallery"),this.core.s=a.extend({},e,this.core.s),this.core.s.zoom&&this.core.doCss()&&(this.init(),this.zoomabletimeout=!1),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>';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.$slide.eq(d).addClass("lg-zoomable")},f+30)});var e=1,f=function(a,b,d,e){var f,g,h=c.core.$outer.find(".lg-current .lg-image");b?(f=d-h.offset().left,g=e-h.offset().top):(f=h.width()/2,g=h.height()/2);var i=(a-1)*f,j=(a-1)*g;h.css("transform","scale3d("+a+", "+a+", 1)").attr("data-scale",a),h.parent().css("transform","translate3d(-"+i+"px, -"+j+"px, 0)").attr("data-x",i).attr("data-y",j)},g=function(a,b,d){e>1?c.core.$outer.addClass("lg-zoomed"):c.core.$outer.removeClass("lg-zoomed"),1>e&&(e=1),f(e,a,b,d)};c.core.$el.on("onAferAppendSlide.lg.tm.zoom",function(a,b){var d=c.core.$slide.eq(b).find(".lg-image");d.dblclick(function(a){var f,h=d.width(),i=c.core.$items.eq(b).attr("data-width")||d[0].naturalWidth||h;c.core.$outer.hasClass("lg-zoomed")?e=1:i>h&&(f=i/h,e=f||2),g(!0,a.pageX,a.pageY),setTimeout(function(){c.core.$outer.removeClass("lg-grabbing").addClass("lg-grab")},10)})}),a(b).on("resize.lg.zoom orientationchange.lg.zoom",function(){setTimeout(function(){c.core.$outer.hasClass("lg-zoomed")&&f(e)},10)}),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())}),c.core.$el.on("onBeforeSlide.lg.tm",function(){c.resetZoom()}),c.core.isTouch||c.zoomDrag(),c.core.isTouch&&c.zoomSwipe()},f.prototype.resetZoom=function(){this.core.$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")},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=g.originalEvent.targetTouches[0].pageX,c={x:g.originalEvent.targetTouches[0].pageX,y:g.originalEvent.targetTouches[0].pageY},a.core.$outer.addClass("lg-zoom-dragging"),i=f?-Math.abs(j.attr("data-y"))+(c.y-b.y):-Math.abs(j.attr("data-y")),h=e?-Math.abs(j.attr("data-x"))+(c.x-b.x):-Math.abs(j.attr("data-x")),j.css("transform","translate3d("+h+"px, "+i+"px, 0)")}}),a.core.$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("transform","translate3d("+b+"px, "+j+"px, 0)")}}),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);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("transform","translate3d("+h+"px, "+i+"px, 0)")},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);