jquery-focuspoint/js/jquery.focuspoint.min.js

jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.

/**
 * jQuery FocusPoint; version: 1.1.3
 * Author: http://jonathonmenz.com
 * Source: https://github.com/jonom/jquery-focuspoint
 * Copyright (c) 2014 J. Menz; MIT License
 * @preserve
 */
!function($){var t={reCalcOnWindowResize:!0,throttleDuration:17},n=function(t){var n=t.find("img").attr("src");t.data("imageSrc",n),i(n,function(n,i){t.data({imageW:i.width,imageH:i.height}),r(t)})},i=function(t,n){$("<img />").one("load",function(){n(null,{width:this.width,height:this.height})}).attr("src",t)},a=function(t,n){var i=!1;return function(){var a=Array.prototype.slice.call(arguments,0);if(i)return!1;i=!0,setTimeout(function(){i=!1,t.apply(null,a)},n)}},o=function(t,n,i,a,o){var r=Math.floor(n/2),e=(a+1)/2,u=Math.floor(i/t),f=Math.floor(e*u);o&&(f=u-f);var c=f-r,s=u-f,h=n-r;return s<h&&(c-=h-s),c<0&&(c=0),-100*c/n+"%"},r=function(t){var i=t.data("imageW"),a=t.data("imageH"),r=t.data("imageSrc");if(!i&&!a&&!r)return n(t);var e=t.width(),u=t.height(),f=parseFloat(t.data("focusX")),c=parseFloat(t.data("focusY")),s=t.find("img").first(),h=0,d=0;if(!(e>0&&u>0&&i>0&&a>0))return!1;var l=i/e,w=a/u;s.css({"max-width":"","max-height":""}),i>e&&a>u&&s.css(l>w?"max-height":"max-width","100%"),l>w?h=o(w,e,i,f):l<w&&(d=o(l,u,a,c,!0)),s.css({top:d,left:h})},e=$(window),u=function(t,n){var i=n.throttleDuration?a(function(){r(t)},n.throttleDuration):function(){r(t)},o=!1;return r(t),{adjustFocus:function(){return r(t)},windowOn:function(){if(!o)return e.on("resize",i),o=!0},windowOff:function(){if(o)return e.off("resize",i),o=!1,!0}}};$.fn.focusPoint=function(n){if("string"==typeof n)return this.each(function(){$(this).data("focusPoint")[n]()});var i=$.extend({},t,n);return this.each(function(){var t=$(this),n=u(t,i);t.data("focusPoint")&&t.data("focusPoint").windowOff(),t.data("focusPoint",n),i.reCalcOnWindowResize&&n.windowOn()})},$.fn.adjustFocus=function(){return this.each(function(){r($(this))})}}(jQuery);