{"version":3,"file":"slimmage.min.js","sources":["slimmage.js"],"sourcesContent":["/* Slimmage 0.2.3-bg, use with ImageResizer. MIT/Apache2 dual licensed by Imazen */\n\n(function (w) { //w==window\n    // Enable strict mode\n    \"use strict\";\n\n    var s = window.slimmage || {};\n    /** @expose **/\n    window.slimmage = s;\n    if (s.verbose === undefined) /** @expose **/ s.verbose = true;\n    if (s.tryWebP === undefined) /** @expose **/ s.tryWebP = false;\n    if (s.readyCallback === undefined) /** @expose **/ s.readyCallback = null;\n    if (s.maxWidth === undefined) /** @expose **/ s.maxWidth = 2048;\n    if (s.widthStep === undefined) /** @expose **/ s.widthStep = 160;\n    if (s.jpegQuality === undefined) /** @expose **/ s.jpegQuality = 90;\n    if (s.jpegRetinaQuality === undefined) /** @expose **/ s.jpegRetinaQuality = 80;\n\n    var log = function () { if (w.slimmage.verbose && w.console && w.console.log) try { w.console.log.apply(w.console, arguments); } catch (e) { } };\n    s.beginWebPTest = function () {\n        if (!s.tryWebP || s._testingWebP) return;\n        s._testingWebP = true;\n\n        var WebP = new Image();\n        WebP.onload = WebP.onerror = function () {\n            s.webp = (WebP.height == 2);\n        };\n        WebP.src = 'data:image/webp;base64,UklGRjoAAABXRUJQVlA4IC4AAACyAgCdASoCAAIALmk0mk0iIiIiIgBoSygABc6WWgAA/veff/0PP8bA//LwYAAA';\n    };\n\n    s.getCssValue = function (target, hyphenProp) {\n        var val = typeof (window.getComputedStyle) != \"undefined\" && window.getComputedStyle(target, null).getPropertyValue(hyphenProp);\n        if (!val && target.currentStyle) {\n            val = target.currentStyle[hyphenProp.replace(/([a-z])\\-([a-z])/, function (a, b, c) { return b + c.toUpperCase(); })] || target.currentStyle[hyphenProp];\n        }\n        return val;\n    };\n\n    s.getCssPixels = function (target, hyphenProp) {\n        var val = s.getCssValue(target, hyphenProp);\n\n        //We can return pixels directly, but not other units\n        if (val.slice(-2) == \"px\") return parseFloat(val.slice(0, -2));\n\n        // Some browsers (IE8, Firefox 28) read \"none\" when not set. 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Copy images out of noscript tags, but hide 'src' attribute as data-src\n        var n = s.nodesToArray(w.document.getElementsByTagName(\"noscript\"));\n        for (var i = 0, il = n.length; i < il; i++) {\n            var ns = n[i];\n            if (ns.getAttribute(\"data-slimmage\") !== null) {\n\n                var div = w.document.createElement('div');\n                var contents = (ns.textContent || ns.innerHTML);\n                if (!contents || contents.replace(/[\\s\\t\\r\\n]+/, \"\").length == 0) {\n                    //IE doesn't let us touch noscript, so we have to use attributes.\n                    var img = new Image();\n                    for (var ai = 0; ai < ns.attributes.length; ai++) {\n                        var a = ns.attributes[ai];\n                        if (a && a.specified && a.name.indexOf(\"data-img-\") == 0) {\n                            img.setAttribute(a.name.slice(9 - a.name.length), a.value);\n                        }\n                    }\n                    div.appendChild(img);\n                } else {\n                    //noscript isn't part of DOM, so we have to recreate it, unescaping html, src->data-src \n                    div.innerHTML = contents.replace(/\\s+src\\s*=\\s*(['\"])/i, \" data-src=$1\").\n                        replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&amp;/g, '&');\n                }\n                //Clear source values before we add it back to the dom, ensure data-slimmage is set.\n                var childImages = div.getElementsByTagName(\"img\");\n                for (var j = 0, jl = childImages.length; j < jl; j++) {\n                    var ci = childImages[j];\n                    if (ci.src !== null && ci.src.length > 0) {\n                        ci.setAttribute(\"data-src\", ci.src);\n                        ci.src = \"\";\n                    }\n                    ci.setAttribute(\"data-slimmage\", true);\n                    ns.parentNode.insertBefore(ci, ns);\n                    newImages++;\n                }\n                //2. 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Callback when ready\n        if (typeof s.readyCallback === 'function') {\n            s.readyCallback();\n        }\n\n        log(\"Slimmage: restored \" + newImages + \" images from noscript tags; sizing \" + totalImages + \" images. \" + (new Date().getTime() - stopwatch) + \"ms\");\n    };\n\n    var h = s.checkResponsiveImages;\n    // Run on resize and domready (w.load as a fallback)\n    if (w.addEventListener) {\n        w.addEventListener(\"resize\", function () { h(500); }, false);\n        w.addEventListener(\"DOMContentLoaded\", function () {\n            h();\n            // Run once only\n            w.removeEventListener(\"load\", h, false);\n        }, false);\n        w.addEventListener(\"load\", h, false);\n    } else if (w.attachEvent) {\n        w.attachEvent(\"onload\", h);\n    }\n    //test for webp support\n    s.beginWebPTest();\n}(this));\n"],"names":["w","log","slimmage","verbose","console","apply","arguments","e","s","window","h","undefined","tryWebP","readyCallback","maxWidth","widthStep","jpegQuality","jpegRetinaQuality","beginWebPTest","WebP","_testingWebP","Image","onload","onerror","webp","height","src","getCssValue","target","hyphenProp","val","getComputedStyle","getPropertyValue","currentStyle","replace","a","b","c","toUpperCase","getCssPixels","slice","parseFloat","temp","document","createElement","pixels","style","overflow","visibility","clear","parentNode","appendChild","width","offsetWidth","removeChild","nodesToArray","nodeList","array","i","length","getImageSrcWithWidth","img","originalSrc","data","dpr","devicePixelRatio","oldpixels","requestedWidth","Math","min","requestedHeight","offsetHeight","quality","getAttribute","adjustImageParameters","newSrc","setAttribute","adjustImageSrc","adjustBackgroundImage","elem","backgroundImage","checkResponsiveImages","delay","timeoutid","clearTimeout","setTimeout","stopwatch","Date","getTime","newImages","n","getElementsByTagName","il","ns","div","contents","textContent","innerHTML","ai","attributes","specified","name","indexOf","value","childImages","j","jl","ci","insertBefore","totalImages","images","querySelectorAll","bgImages","originalBg","addEventListener","removeEventListener","attachEvent","this"],"mappings":"AAEA,CAAC,SAAUA,GAeG,SAANC,MAAoB,GAAID,EAAEE,SAASC,SAAWH,EAAEI,SAAWJ,EAAEI,QAAQH,IAAK,IAAMD,EAAEI,QAAQH,IAAII,MAAML,EAAEI,QAASE,SAAS,CAAiB,CAAZ,MAAOC,IAAO,CAX/I,IAAIC,EAAIC,OAAOP,UAAY,GAwLvBQ,GArLcC,KAAAA,KADlBF,OAAOP,SAAWM,GACZL,UAAuCK,EAAEL,QAAU,CAAA,GACvCQ,KAAAA,IAAdH,EAAEI,UAAuCJ,EAAEI,QAAU,CAAA,GACjCD,KAAAA,IAApBH,EAAEK,gBAA6CL,EAAEK,cAAgB,MAClDF,KAAAA,IAAfH,EAAEM,WAAwCN,EAAEM,SAAW,MACvCH,KAAAA,IAAhBH,EAAEO,YAAyCP,EAAEO,UAAY,KACvCJ,KAAAA,IAAlBH,EAAEQ,cAA2CR,EAAEQ,YAAc,IACrCL,KAAAA,IAAxBH,EAAES,oBAAiDT,EAAES,kBAAoB,IAG7ET,EAAEU,cAAgB,WACd,IAGIC,KAHCX,EAAEI,SAAWJ,CAAAA,EAAEY,eACpBZ,EAAEY,aAAe,CAAA,GAEbD,KAAO,IAAIE,OACVC,OAASH,KAAKI,QAAU,WACzBf,EAAEgB,KAAuB,GAAfL,KAAKM,MACnB,EACAN,KAAKO,IAAM,kHACf,EAEAlB,EAAEmB,YAAc,SAAUC,OAAQC,YAC9B,IAAIC,IAA0C,KAAA,IAA5BrB,OAAuB,kBAAoBA,OAAOsB,iBAAiBH,OAAQ,IAAI,EAAEI,iBAAiBH,UAAU,EAI9H,OAFIC,IADA,CAACA,KAAOF,OAAOK,aACTL,OAAOK,aAAaJ,WAAWK,QAAQ,mBAAoB,SAAUC,EAAGC,EAAGC,GAAK,OAAOD,EAAIC,EAAEC,YAAY,CAAG,CAAC,IAAMV,OAAOK,aAAaJ,YAE1IC,GACX,EAEAtB,EAAE+B,aAAe,SAAUX,OAAQC,YAC3BC,WAAMtB,EAAEmB,YAAYC,OAAQC,UAAU,EAG1C,GAAqB,MAAjBC,WAAIU,MAAM,CAAC,CAAC,EAAW,OAAOC,WAAWX,WAAIU,MAAM,EAAG,CAAC,CAAC,CAAC,EAIlD,QAAPV,aAAeA,WAAM,IAIzB,IAAIY,KAAOC,SAASC,cAAc,KAAK,EAKnCC,YAJJH,KAAKI,MAAMC,SAAWL,KAAKI,MAAME,WAAa,SAC9CN,KAAKI,MAAMG,MAAQ,OACnBrB,OAAOsB,WAAWC,YAAYT,IAAI,EAClCA,KAAKI,MAAMM,MAAQtB,WACNY,KAAKW,aAElB,OADAzB,OAAOsB,WAAWI,YAAYZ,IAAI,EAC3BG,UACX,EAEArC,EAAE+C,aAAe,SAAUC,UAGvB,IAFA,IAAIC,MAAQ,GAEHC,EAAIF,SAASG,SAAW,EAAGD,CAAC,IACjCD,MAAMC,GAAKF,SAASE,GAExB,OAAOD,KACX,EAEAjD,EAAEoD,qBAAuB,SAAUC,IAAKC,YAAaV,OACjD,IAAIW,MAAO,CACPvC,KAAMhB,EAAEgB,KACR4B,MAAOA,MACPY,IAAKvD,OAAOwD,kBAAoB,EAChCvC,IAAKoC,WACT,EAUII,WARJH,MAAKI,eAAiBC,KAAKC,IAAI7D,EAAEM,SAAUiD,MAAKX,MAAQW,MAAKC,GAAG,EAC5DD,MAAKO,gBAAkBT,IAAIU,aAC3BR,MAAKS,QAAsB,KAAXT,MAAKC,IAAcxD,EAAES,kBAAoBT,EAAEQ,YAC3D+C,MAAKvC,OAAMuC,MAAKS,QAAqB,KAAXT,MAAKC,IAAa,GAAK,IAGrDD,MAAKI,eAAiBJ,MAAKI,eAAkBJ,MAAKI,eAAiB3D,EAAEO,UAAaP,EAAEO,UAE7B,EAAvC8C,IAAIY,aAAa,kBAAkB,GAMnD,GAJIjE,EAAEkE,uBAA8D,YAArC,OAAQlE,EAAuB,uBAC1DA,EAAEkE,sBAAsBX,KAAI,EAGNG,UAAtBH,MAAKI,eAML,OAJIQ,UAASb,YAAY5B,QAAQ,aAAc,SAAW6B,MAAKI,cAAc,EAAEjC,QAAQ,kBAAmB,WAAa6B,MAAKS,OAAO,EAAEtC,QAAQ,cAAe,UAAY6B,MAAKO,eAAe,EACxLP,MAAKvC,OAAMmD,UAASA,UAAOzC,QAAQ,iBAAkB,aAAa,GACtE2B,IAAIe,aAAa,mBAAoBb,MAAKI,cAAc,EACxDlE,IAAI,sBAAwB0E,SAAM,EAC3BA,SAEf,EACAnE,EAAEqE,eAAiB,SAAUhB,IAAKC,aAC1Ba,YAASnE,EAAEoD,qBAAqBC,IAAKC,YAAatD,EAAE+B,aAAasB,IAAK,WAAW,CAAC,EAClFc,cAAQd,IAAInC,IAAMiD,YAC1B,EACAnE,EAAEsE,sBAAwB,SAAUC,KAAMjB,aACtC,IAAIa,OAASnE,EAAEoD,qBAAqBmB,KAAMjB,YAAatD,EAAE+B,aAAawC,KAAM,WAAW,CAAC,EACpFJ,SAAQI,KAAKjC,MAAMkC,gBAAkB,OAASL,OAAS,KACtDI,KAAKjC,MAAMkC,kBAAiBD,KAAKjC,MAAMkC,gBAAkB,OAASlB,YAAc,IACzF,EAEAtD,EAAEyE,sBAAwB,SAAUC,OAGhC,GAFkB,EAAd1E,EAAE2E,WAAenF,EAAEoF,aAAa5E,EAAE2E,SAAS,EAC/C3E,EAAE2E,UAAY,EACVD,OAAiB,EAARA,MACT1E,EAAE2E,UAAYnF,EAAEqF,WAAW7E,EAAEyE,sBAAuBC,KAAK,MAD7D,CASA,IALA,IAAII,OAAY,IAAIC,MAAOC,QAAQ,EAE/BC,UAAY,EAEZC,EAAIlF,EAAE+C,aAAavD,EAAE2C,SAASgD,qBAAqB,UAAU,CAAC,EACzDjC,EAAI,EAAGkC,GAAKF,EAAE/B,OAAQD,EAAIkC,GAAIlC,CAAC,GAAI,CACxC,IAAImC,GAAKH,EAAEhC,GACX,GAAyC,OAArCmC,GAAGpB,aAAa,eAAe,EAAY,CAE3C,IAAIqB,IAAM9F,EAAE2C,SAASC,cAAc,KAAK,EACpCmD,SAAYF,GAAGG,aAAeH,GAAGI,UACrC,GAAKF,UAA0D,GAA9CA,SAAS7D,QAAQ,cAAe,EAAE,EAAEyB,OAYjDmC,IAAIG,UAAYF,SAAS7D,QAAQ,uBAAwB,cAAc,EACnEA,QAAQ,QAAS,GAAG,EAAEA,QAAQ,QAAS,GAAG,EAAEA,QAAQ,SAAU,GAAG,MAbP,CAG9D,IADA,IAAI2B,IAAM,IAAIxC,MACL6E,GAAK,EAAGA,GAAKL,GAAGM,WAAWxC,OAAQuC,EAAE,GAAI,CAC9C,IAAI/D,EAAI0D,GAAGM,WAAWD,IAClB/D,GAAKA,EAAEiE,WAA4C,GAA/BjE,EAAEkE,KAAKC,QAAQ,WAAW,GAC9CzC,IAAIe,aAAazC,EAAEkE,KAAK7D,MAAM,EAAIL,EAAEkE,KAAK1C,MAAM,EAAGxB,EAAEoE,KAAK,CAEjE,CACAT,IAAI3C,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