ral.min.js

var RAL={debug:!1};RAL.Heap=function(){this.items=[]},RAL.Heap.prototype={getNextHighestPriority:function(){var e=1;return this.items[0]&&(e=this.items[0].priority+1),e},parentIndex:function(e){return Math.floor(.5*e)},leftChildIndex:function(e){return 2*e},rightChildIndex:function(e){return 2*e+1},get:function(e){var t=null;return e>=1&&this.items[e-1]&&(t=this.items[e-1]),t},set:function(e,t){this.items[e-1]=t},swap:function(e,t){var n=this.get(e);this.set(e,this.get(t)),this.set(t,n)},upHeap:function(e){var t=null,n=null,i=null,o=!1;do o=!1,i=this.parentIndex(e),t=this.get(e),n=this.get(i),o=null!==n&&t.priority>n.priority,o&&(this.swap(e,i),e=i);while(o)},downHeap:function(e){var t=null,n=null,i=null,o=null,r=null,s=null,a=!1;do a=!1,o=this.leftChildIndex(e),r=this.rightChildIndex(e),t=this.get(e)&&this.get(e).priority,n=this.get(o)&&this.get(o).priority,i=this.get(r)&&this.get(r).priority,null===n&&(n=Number.NEGATIVE_INFINITY),null===i&&(i=Number.NEGATIVE_INFINITY),s=Math.max(n,i),s>t&&(i===s?(this.swap(e,r),e=r):(this.swap(e,o),e=o),a=!0);while(a)},add:function(e){this.items.push(e),this.upHeap(this.items.length)},remove:function(){var e=null;return this.items.length&&(this.swap(1,this.items.length),e=this.get(this.items.length),this.items.length-=1,this.downHeap(1)),e}},RAL.Sanitiser=function(){function e(e){return e.replace(/.*?:\/\//,"",e)}return{cleanURL:e}}(),RAL.CacheParser=function(){function e(e){var t=/max\-age=(\d+)/gi,n=/Cache-Control:.*?no\-cache/gi,i=/Cache-Control:.*?no\-store/gi,o=/Cache-Control:.*?must\-revalidate/gi,r=/Expires:\s(.*)/gi,s=[],a=t.exec(e),l=Date.now();return i.test(e)&&s.push("Cache-Control: no-store is set"),n.test(e)&&s.push("Cache-Control: no-cache is set"),o.test(e)&&s.push("Cache-Control: must-revalidate is set"),null!==a?l=Date.now()+1e3*a[1]:(a=r.exec(e),null!==a?l=Date.parse(a[1]):s.push("Cache-Control: max-age and Expires: headers are not set")),{headers:e,cacheable:0===s.length,useBy:l,warnings:s}}return{parse:e}}(),RAL.FileSystem=function(){function e(){return l}function t(e){c.push(e)}function n(e,t,n){l&&(e=RAL.Sanitiser.cleanURL(e),h.getFile(e,{},function(e){t(e.toURL())},n))}function i(e,t,n){l&&(e=RAL.Sanitiser.cleanURL(e),h.getFile(e,{},function(e){e.file(function(e){var n=new FileReader;n.onloadend=function(){t(this.result)},n.readAsText(e)})},n))}function o(e,t,n){if(l){e=RAL.Sanitiser.cleanURL(e);var i=e.split("/");i.pop(),r(h,i,function(){h.getFile(e,{create:!0},function(e){e.createWriter(function(i){i.onwriteend=function(){i.onwriteend=function(){n(e.toURL())},i.truncate(t.size)},i.onerror=function(e){console.warn("Write failed: "+e.toString())},i.write(t)},u.onError)},u.onError)})}}function r(e,t,n){("."===t[0]||""===t[0])&&(t=t.slice(1)),t.length?e.getDirectory(t[0],{create:!0},function(e){t.length&&r(e,t.slice(1),n)},u.onError):n()}function s(e,t,n){l&&h.getDirectory(e,{},function(e){e.removeRecursively(t,u.onError)},n||u.onError)}function a(e,t,n){l&&h.getFile(e,{},function(e){e.remove(t,u.onError)},n||u.onError)}var l=!1,c=[],h=null,u={onError:function(e){var t="";switch(e.code){case FileError.QUOTA_EXCEEDED_ERR:t="QUOTA_EXCEEDED_ERR";break;case FileError.NOT_FOUND_ERR:t="NOT_FOUND_ERR";break;case FileError.SECURITY_ERR:t="SECURITY_ERR";break;case FileError.INVALID_MODIFICATION_ERR:t="INVALID_MODIFICATION_ERR";break;case FileError.INVALID_STATE_ERR:t="INVALID_STATE_ERR";break;default:t="Unknown Error"}console.error("Error: "+t,e)},onInitialised:function(e){if(h=e.root,l=!0,c.length)for(var t=c.length;t--;)c[t]()}};return function(e){e=e||10,window.requestFileSystem=window.requestFileSystem||window.webkitRequestFileSystem,window.resolveLocalFileSystemURL=window.resolveLocalFileSystemURL||window.webkitResolveLocalFileSystemURL,window.requestFileSystem&&window.requestFileSystem(window.TEMPORARY,1024*1024*e,u.onInitialised,u.onError)}(),{isReady:e,registerOnReady:t,getPath:n,getDataAsText:i,set:o,removeFile:a,removeDir:s}}(),RAL.FileManifest=function(){function e(){return h}function t(e){u.push(e)}function n(e,t){var n=RAL.Sanitiser.cleanURL(e),i=c[n]||null;t(i)}function i(e,t,n){var i=RAL.Sanitiser.cleanURL(e);c[i]=t,a(n)}function o(){c={},a()}function r(){s("{}")}function s(e){if(h=!0,c=JSON.parse(e),u.length)for(var t=u.length;t--;)u[t]()}function a(e){var t=new Blob([JSON.stringify(c)],{type:"application/json"});RAL.FileSystem.set("manifest.json",t,function(){e&&e()})}function l(){RAL.FileSystem.getDataAsText("manifest.json",s,r)}var c=null,h=!1,u=[];return RAL.FileSystem.isReady()?l():RAL.FileSystem.registerOnReady(l),{isReady:e,registerOnReady:t,get:n,set:i,reset:o}}(),RAL.RemoteFile=function(){},RAL.RemoteFile.prototype={element:null,src:null,autoLoad:!1,ignoreCacheHeaders:!1,timeToLive:12096e5,priority:0,loaded:!1,wURL:window.URL||window.webkitURL,callbacks:{onCacheError:function(e){e.src=this.src,this.sendEvent("cacheerror",e)},onRemoteFileLoaded:function(e,t){if(this.ignoreCacheHeaders&&(t.cacheable=!0,t.useBy+=this.timeToLive),t.cacheable)RAL.FileSystem.set(this.src,e,this.callbacks.onFileSystemSet.bind(this,t));else{var n=this.wURL.createObjectURL(e);this.callbacks.onLocalFileLoaded.call(this,n),this.callbacks.onCacheError.call(this,t)}this.sendEvent("remoteloaded",t)},onRemoteFileUnavailable:function(){this.sendEvent("remoteunavailable")},onLocalFileLoaded:function(e){this.loaded=!0,this.sendEvent("loaded",e)},onLocalFileUnavailable:function(){this.showPlaceholder(),this.loadFromRemote(),this.sendEvent("localunavailable")},onFileSystemSet:function(e){RAL.FileManifest.set(this.src,e,this.callbacks.onFileManifestSet.bind(this))},onFileManifestSet:function(){this.load()},onFileManifestGet:function(e){var t=Date.now();null!==e?e.useBy>t||!RAL.NetworkMonitor.isOnline()?RAL.FileSystem.getPath(this.src,this.callbacks.onLocalFileLoaded.bind(this),this.callbacks.onLocalFileUnavailable.bind(this)):this.loadFromRemote():this.loadFromRemote()}},sendEvent:function(e,t){this.checkForElement();var n=document.createEvent("Event");n.initEvent(e,!0,!0),t&&(n.data=t),this.element.dispatchEvent(n)},loadFromRemote:function(){RAL.Loader.load(this.src,"blob",this.callbacks.onRemoteFileLoaded.bind(this),this.callbacks.onRemoteFileUnavailable.bind(this)),this.sendEvent("remoteloadstart")},load:function(){RAL.FileManifest.get(this.src,this.callbacks.onFileManifestGet.bind(this))},checkForElement:function(){this.element||(this.element=document.createElement("span"))},addEventListener:function(e,t,n){this.checkForElement(),this.element.addEventListener(e,t,n)}},RAL.RemoteImage=function(e){RAL.RemoteFile.call(this),e=e||{},this.element=e.element||document.createElement("img"),this.src=this.element.dataset.src||e.src,this.width=this.element.width||e.width||null,this.height=this.element.height||e.height||null,this.placeholder=this.element.dataset.placeholder||null,this.priority=e.priority||0,this.addEventListener("remoteloadstart",this.showPlaceholder.bind(this)),this.addEventListener("loaded",this.showImage.bind(this)),"undefined"!=typeof e.autoLoad&&(this.autoLoad=e.autoLoad),"undefined"!=typeof e.ignoreCacheHeaders&&(this.ignoreCacheHeaders=e.ignoreCacheHeaders),this.ignoreCacheHeaders&&"undefined"!=typeof this.timeToLive&&(this.timeToLive=e.timeToLive),this.autoLoad?this.load():this.showPlaceholder()},RAL.RemoteImage.prototype=new RAL.RemoteFile,RAL.RemoteImage.prototype.showPlaceholder=function(){null!==this.placeholder&&(this.element.style["-webkit-transition"]="background-image 0.5s ease-out",this.showImage({data:this.placeholder}))},RAL.RemoteImage.prototype.showImage=function(e){var t=e.data,n=new Image,i=function(e){this.wURL.revokeObjectURL(e)}.bind(this,t),o=function(){var e=this.width||n.naturalWidth,o=this.height||n.naturalHeight;this.element.src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",this.element.style.width=e+"px",this.element.style.height=o+"px",this.element.style.backgroundImage="url("+t+")",this.element.style.backgroundSize=e+"px "+o+"px",/blob:/.test(t)&&setTimeout(i,100)};n.onload=o.bind(this),n.src=t},RAL.Loader=function(){function e(e,t,n,i){e.abort(),this.load(t,n,i)}function t(i,o,r,s){if(RAL.NetworkMonitor.isOnline()){var a=new XMLHttpRequest;a.responseType=o,a.onerror=n.onError.bind(this,s),a.onload=n.onLoad.bind(this,i,r,s),a.open("GET",i,!0),a.send(),RAL.NetworkMonitor.registerForOffline(e.bind(this,a,i,r,s))}else RAL.NetworkMonitor.registerForOnline(t.bind(this,i,r,s))}var n={onLoad:function(e,t,n,i){var o=i.target,r=o.response,s=RAL.CacheParser.parse(o.getAllResponseHeaders());4===o.readyState&&(200===o.status?t(r,s):n(i))},onError:function(e,t){e(t)}};return{load:t}}(),RAL.NetworkMonitor=function(){function e(e){i.push(e)}function t(e){o.push(e)}function n(){return window.navigator.onLine}var i=[],o=[];return window.addEventListener("online",function(){for(var e=i.length,t=null;e--;)t=i.pop(),t()}),window.addEventListener("offline",function(){for(var e=o.length,t=null;e--;)t=o.pop(),t()}),{registerForOnline:e,registerForOffline:t,isOnline:n}}(),RAL.Queue=function(){function e(){return r.getNextHighestPriority()}function t(e){a=e}function n(e,t){"undefined"==typeof e.priority&&(e.priority=r.getNextHighestPriority()),r.add(e),t&&i()}function i(){for(;a>s;){if(nextFile=r.remove(),null===nextFile){RAL.debug&&console.log("[Connections: "+s+"] - No more images queued");break}nextFile.addEventListener("loaded",l.onFileLoaded),nextFile.load(),RAL.debug&&console.log("[Connections: "+s+"] - Loading "+nextFile.src),s++}}function o(){r.clear()}var r=new RAL.Heap,s=0,a=6,l={onFileLoaded:function(){RAL.debug&&console.log("[Connections: "+s+"] - File loaded"),s--,i()}};return{getNextHighestPriority:e,setMaxConnections:t,add:n,clear:o,start:i}}();