X-Git-Url: https://scm.cri.ensmp.fr/git/Plinn.git/blobdiff_plain/02643dc71034e01a60f505cdc0887ae79314a3ed..6ea74343d9d1efd307748c539b87b278d25f484d:/skins/ajax_scripts/fileupload.js

diff --git a/skins/ajax_scripts/fileupload.js b/skins/ajax_scripts/fileupload.js
new file mode 100644
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+++ b/skins/ajax_scripts/fileupload.js
@@ -0,0 +1,127 @@
+// © 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);
+};
+
+DDFileUploaderBase.prototype.dragover = function(evt) {
+	disableDefault(evt);
+	disablePropagation(evt);
+	evt = getEventObject(evt);
+	var dt = evt.dataTransfer;
+	dt.dropEffect = 'copy';
+};
+
+DDFileUploaderBase.prototype.drop = function(evt) {
+	disableDefault(evt);
+	disablePropagation(evt);
+	getEventObject(evt);
+	var dt = evt.dataTransfer;
+	dt.dropEffect = 'copy';
+	this.handleFiles(dt.files);
+};
+
+// Methods about upload
+DDFileUploaderBase.prototype.handleFiles = function(files) {
+	// To be implemented by descendant.
+};
+
+
+
+DDFileUploaderBase.prototype.beforeUpload = function(item) {
+	// To be implemented by decendant.
+};
+
+
+DDFileUploaderBase.prototype.upload = function(item) {
+	// item.file must be the file to be uploaded
+	this.beforeUpload(item);
+	var reader = new FileReader();
+	var req = new XMLHttpRequest();
+	var file = item.file;
+	
+	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.uploadCompleteHandlerCB = function(req) {
+	// To be implemented by descendant.
+};
+
+DDFileUploaderBase.prototype.uploadCompleteHandler = function(req) {
+	this.uploadCompleteHandlerCB(req);
+	this.uploadQueueLoadNext();
+};
+
+DDFileUploaderBase.prototype.progressHandlerCB = function(progress) {
+	// To be implemented by descendant.
+	// 0 <= progress <= 1
+};
+
+DDFileUploaderBase.prototype.progressHandler = function(evt) {
+	if (evt.lengthComputable) {
+		var progress = evt.loaded / evt.total;
+		this.progressHandlerCB(progress);
+	}
+};
+
+// 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;
+	}
+};
+
+}());