Déplacement au bon endroit.

[Plinn.git] / skins / ajax_scripts / fileupload.js

diff --git a/skins/ajax_scripts/fileupload.js b/skins/ajax_scripts/fileupload.js
new file mode 100644 (file)
index 0000000..bf36628
--- /dev/null
+++ 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;
+       }
+};
+
+}());