X-Git-Url: https://scm.cri.mines-paristech.fr/git/Plinn.git/blobdiff_plain/36f853f6b380099a378c032baf46f35d914026f9..3a3be28d0d1c6380db8dcd56795218112fa5804e:/skins/fileupload.js

diff --git a/skins/fileupload.js b/skins/fileupload.js
index d862ad6..5a69929 100644
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -1,54 +1,139 @@
-function dragenter(evt) {
+// © 2013 Benoît Pin MINES ParisTech
+var DDFileUploaderBase;
+
+(function(){
+
+DDFileUploaderBase = function(dropbox, uploadUrl) {
+	this.dropbox = dropbox;
+	this.uploadUrl = uploadUrl;
+	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);});
+};
+
+// 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);
+	this.handleFiles(dt.files);
+};
+
+// Methods about upload
+DDFileUploaderBase.prototype.handleFiles = function(files) {
+	// To be implemented by descendant.
+};
+
+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);
+	}
+};
 
-function init() {
-	var dropbox = document.getElementById('dropbox');
-	addListener(dropbox, 'dragenter', dragenter);
-	addListener(dropbox, 'dragover', dragover);
-	addListener(dropbox, 'drop', drop);
-}
+// Methods about queue
+DDFileUploaderBase.prototype.uploadQueuePush = function(item) {
+	this.uploadQueue.push(item);
+	if (!this._uploadQueueRunning) {
+		this.startUploadQueue();
+	}
+};
 
+DDFileUploaderBase.prototype.startUploadQueue = function() {
+	this._uploadQueueRunning = true;
+	this.uploadQueueLoadNext();
+};
+
+DDFileUploaderBase.prototype.uploadQueueLoadNext = function() {
+	var item = this.uploadQueue.shift();
+	if (item) {
+		this.upload(item);
+	}
+	else {
+		this._uploadQueueRunning = false;
+	}
+};
 
-addListener(window, 'load', init);
\ No newline at end of file
+}());