X-Git-Url: https://svn.cri.ensmp.fr/git/Plinn.git/blobdiff_plain/36f853f6b380099a378c032baf46f35d914026f9..7e1385a802cc364f2d36bf32715a589ecc19d215:/skins/fileupload.js?ds=inline diff --git a/skins/fileupload.js b/skins/fileupload.js index d862ad6..4061a0c 100644 --- a/skins/fileupload.js +++ b/skins/fileupload.js @@ -1,54 +1,259 @@ -function dragenter(evt) { +// © 2013 Benoît Pin MINES ParisTech +var DDFileUploaderBase; + +(function(){ +// nombre maximun d'image chargées en local +var MAX_PREVIEW = 2; +var isThumbnail = /.*\/getThumbnail$/; + +DDFileUploaderBase = function(dropbox, uploadUrl) { + this.dropbox = dropbox; + this.existingSlides = this.indexExistingSlides(); + this.uploadUrl = uploadUrl; + this.slideSize = 222; + this.progressBarMaxSize = 200; // pixels + this.thumbnailSize = 180; + this.previewQueue = []; + this._previewQueueRunning = false; + this.previewsLoaded = 0; + this.uploadQueue = []; + this._uploadQueueRunning = false; + var self = this; + addListener(dropbox, 'dragenter', function(evt){self.dragenter(evt);}); + addListener(dropbox, 'dragover', function(evt){self.dragover(evt);}); + addListener(dropbox, 'drop', function(evt){self.drop(evt);}); +}; + +DDFileUploaderBase.prototype.indexExistingSlides = function() { + var images = this.dropbox.getElementsByTagName('img'); + var i; + var index = []; + for (i=0 ; i < images.length ; i++) { + if (isThumbnail.test(images[i].src)) { + index[images[i].src] = images[i]; + } + } + return index; +}; + +// Drag and drop +DDFileUploaderBase.prototype.dragenter = function(evt) { disableDefault(evt); disablePropagation(evt); -} +}; -function dragover(evt) { +DDFileUploaderBase.prototype.dragover = function(evt) { disableDefault(evt); disablePropagation(evt); evt = getEventObject(evt); var dt = evt.dataTransfer; dt.dropEffect = 'copy'; -} +}; - -function drop(evt) { +DDFileUploaderBase.prototype.drop = function(evt) { disableDefault(evt); disablePropagation(evt); getEventObject(evt); var dt = evt.dataTransfer; dt.dropEffect = 'copy'; - handleFiles(dt.files); -} - -function handleFiles(files) { - for (var i = 0; i < files.length; i++) { - var file = files[i]; - console.log(file.type); - // console.log(file); - // var imageType = /image.*/; - // - // if (!file.type.match(imageType)) { - // continue; - // } - // - // var img = document.createElement("img"); - // img.classList.add("obj"); - // img.file = file; - // preview.appendChild(img); - // - // var reader = new FileReader(); - // reader.onload = (function(aImg) { return function(e) { aImg.src = e.target.result; }; })(img); - // reader.readAsDataURL(file); - } -} - -function init() { - var dropbox = document.getElementById('dropbox'); - addListener(dropbox, 'dragenter', dragenter); - addListener(dropbox, 'dragover', dragover); - addListener(dropbox, 'drop', drop); -} - - -addListener(window, 'load', init); \ No newline at end of file + this.handleFiles(dt.files); +}; + +// Methods about upload +DDFileUploaderBase.prototype.handleFiles = function(files) { + var file, i, slide; + for (i = 0; i < files.length; i++) { + file = files[i]; + slide = this.createSlide(file); + this.previewQueuePush(slide); + this.uploadQueuePush(slide); + } +}; + +DDFileUploaderBase.prototype.upload = function(slide) { + var reader = new FileReader(); + var req = new XMLHttpRequest(); + var file = slide.file; + this.uploadedSlide = slide; + this.previewImg = slide.img; + this.progressBar = slide.progressBar; + var self = this; + + addListener(req.upload, 'progress', function(evt){self.progressHandler(evt);}); + addListener(req, 'readystatechange', + function(evt) { + if (req.readyState === 4) { + self.uploadCompleteHandler(req); + } + }); + + req.open("PUT", this.uploadUrl); + req.setRequestHeader("Content-Type", file.type); + req.setRequestHeader("X-File-Name", file.name); + addListener(reader, 'load', + function(evt){ + try { + req.sendAsBinary(evt.target.result); + } + catch(e){} + }); + reader.readAsBinaryString(file); +}; + +DDFileUploaderBase.prototype.uploadCompleteHandler = function(req) { + var slide = this.uploadedSlide; + this.uploadedSlide.removeChild(slide.label); + this.uploadedSlide.removeChild(slide.progressBar); + var fragment = getCopyOfNode(req.responseXML.documentElement.firstChild); + var img = fragment.getElementsByTagName('img')[0]; + if (req.status === 200) { + // update + var existing = this.existingSlides[img.src]; + if (existing) { + existing.src = existing.src + '?' + Math.random().toString(); + } + slide.img.src = ''; + slide.img.parentNode.removeChild(slide.img); + slide.img = undefined; + slide.parentNode.removeChild(slide); + } + else if(req.status === 201) { + // creation + img.onload = function(evt) { + // accelerate GC before replacing + slide.img.src = ''; + slide.img.parentNode.removeChild(slide.img); + slide.img = undefined; + slide.parentNode.replaceChild(fragment, slide); + }; + } + this.previewsLoaded--; + this.previewQueueLoadNext(); + this.uploadQueueLoadNext(); +}; + +DDFileUploaderBase.prototype.progressHandler = function(evt) { + if (evt.lengthComputable) { + var progress = evt.loaded / evt.total; + this.updateProgressBar(progress); + var currentOpacity = this.previewImg.style.opacity; + this.previewImg.style.opacity = Math.max(currentOpacity, progress); + } +}; + +// Method about queues + +DDFileUploaderBase.prototype.previewQueuePush = function(slide) { + this.previewQueue.push(slide); + if (!this._previewQueueRunning) { + this.startPreviewQueue(); + } +}; + +DDFileUploaderBase.prototype.startPreviewQueue = function() { + this._previewQueueRunning = true; + this.previewQueueLoadNext(); +}; + +DDFileUploaderBase.prototype.previewQueueLoadNext = function() { + if (this.previewQueue.length && this.previewsLoaded < MAX_PREVIEW) { + var slide = this.previewQueue.shift(); + this.previewUploadedImage(slide); + this.previewsLoaded++; + } + else { + this._previewQueueRunning = false; + } +}; + +DDFileUploaderBase.prototype.uploadQueuePush = function(slide) { + this.uploadQueue.push(slide); + if (!this._uploadQueueRunning) { + this.startUploadQueue(); + } +}; + +DDFileUploaderBase.prototype.startUploadQueue = function() { + this._uploadQueueRunning = true; + this.uploadQueueLoadNext(); +}; + + +DDFileUploaderBase.prototype.uploadQueueLoadNext = function() { + var slide = this.uploadQueue.shift(); + if (slide) { + this.upload(slide); + } + else { + this._uploadQueueRunning = false; + } +}; + + +// User interface +DDFileUploaderBase.prototype.createSlide = function(file) { + var slide = document.createElement('span'); + slide.file = file; + + var a = document.createElement('a'); + a.href = '#'; + a.className = 'slide'; + + var img = document.createElement('img'); + img.className = 'hidden'; + var size = this.thumbnailSize; + var self = this; + img.onload = function(evt) { + if (img.width > img.height) { // landscape + img.height = Math.round(size * img.height / img.width); + img.width = size; + } + else { + img.width = Math.round(size * img.width / img.height); + img.height = size; + } + img.style.marginLeft = Math.floor((self.slideSize - img.width) / 2) + 'px'; + img.style.marginTop = Math.floor((self.slideSize - img.height) / 2) + 'px'; + img.style.opacity = 0.2; + img.className = undefined; + }; + a.appendChild(img); + slide.img = img; + + var label = document.createElement('span'); + slide.label = label; + label.className = 'label'; + label.innerHTML = file.name; + + var progressBar = document.createElement('span'); + progressBar.className = 'upload-progress'; + slide.progressBar = progressBar; + + slide.appendChild(a); + slide.appendChild(progressBar); + slide.appendChild(label); + this.dropbox.appendChild(slide); + + return slide; +}; + +DDFileUploaderBase.prototype.updateProgressBar = function(progress) { + // 0 <= progress <= 1 + var size = this.progressBarMaxSize * progress; + size = Math.round(size); + this.progressBar.style.width = size + 'px'; +}; + +DDFileUploaderBase.prototype.previewUploadedImage = function(slide) { + var reader = new FileReader(); + var size = this.thumbnailSize; + var self = this; + + reader.onload = function(evt) { + slide.img.src = evt.target.result; + setTimeout(function(){self.previewQueueLoadNext();}, 500); + }; + reader.readAsDataURL(slide.file); +}; + +}());