X-Git-Url: https://scm.cri.mines-paristech.fr/git/Plinn.git/blobdiff_plain/c251e45d0fa1c8f0647c1b065d296d6013b62d47..bb34b7f0c5ace769d9f91ab5c90e5a10b2dfd1fe:/skins/fileupload.js

diff --git a/skins/fileupload.js b/skins/fileupload.js
index 8f6eeda..318f059 100644
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -1,19 +1,11 @@
 // © 2013 Benoît Pin MINES ParisTech
-var DDFileUploader;
+var DDFileUploaderBase;
 
 (function(){
-// nombre maximun d'image chargées en local
-var MAX_PREVIEW = 2;
 
-DDFileUploader = function(dropbox, uploadUrl) {
+DDFileUploaderBase = function(dropbox, uploadUrl) {
 	this.dropbox = dropbox;
 	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;
@@ -23,12 +15,12 @@ DDFileUploader = function(dropbox, uploadUrl) {
 };
 
 // Drag and drop
-DDFileUploader.prototype.dragenter = function(evt) {
+DDFileUploaderBase.prototype.dragenter = function(evt) {
 	disableDefault(evt);
 	disablePropagation(evt);
 };
 
-DDFileUploader.prototype.dragover = function(evt) {
+DDFileUploaderBase.prototype.dragover = function(evt) {
 	disableDefault(evt);
 	disablePropagation(evt);
 	evt = getEventObject(evt);
@@ -36,7 +28,7 @@ DDFileUploader.prototype.dragover = function(evt) {
 	dt.dropEffect = 'copy';
 };
 
-DDFileUploader.prototype.drop = function(evt) {
+DDFileUploaderBase.prototype.drop = function(evt) {
 	disableDefault(evt);
 	disablePropagation(evt);
 	getEventObject(evt);
@@ -46,23 +38,24 @@ DDFileUploader.prototype.drop = function(evt) {
 };
 
 // Methods about upload
-DDFileUploader.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.handleFiles = function(files) {
+	// To be implemented by descendant.
+};
+
+
+
+DDFileUploaderBase.prototype.beforeUpload = function(item) {
+	// To be implemented by decendant.
 };
 
-DDFileUploader.prototype.upload = function(slide) {
+
+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 = slide.file;
-	this.uploadedSlide = slide;
-	this.previewImg = slide.img;
-	this.progressBar = slide.progressBar;
+	var file = item.file;
+	
 	var self = this;
 	
 	addListener(req.upload, 'progress', function(evt){self.progressHandler(evt);});
@@ -86,144 +79,71 @@ DDFileUploader.prototype.upload = function(slide) {
 	reader.readAsBinaryString(file);
 };
 
-DDFileUploader.prototype.uploadCompleteHandler = function(req) {
+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];
-	img.onload = function(evt) {
-		var preview = slide.getElementsByTagName('img')[0];
-		preview.src = undefined;
-		slide.parentNode.replaceChild(fragment, slide);
-	};
+	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();
 };
 
-DDFileUploader.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
-
-DDFileUploader.prototype.previewQueuePush = function(slide) {
-	this.previewQueue.push(slide);
-	if (!this._previewQueueRunning) {
-		this.startPreviewQueue();
-	}
-};
-
-DDFileUploader.prototype.startPreviewQueue = function() {
-	this._previewQueueRunning = true;
-	this.previewQueueLoadNext();
+DDFileUploaderBase.prototype.progressHandlerCB = function(progress) {
+	// To be implemented by descendant.
+	// 0 <= progress <= 1
 };
 
-DDFileUploader.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.progressHandler = function(evt) {
+	if (evt.lengthComputable) {
+		var progress = evt.loaded / evt.total;
+		this.progressHandlerCB(progress);
 	}
 };
 
-DDFileUploader.prototype.uploadQueuePush = function(slide) {
-	this.uploadQueue.push(slide);
+// Methods about queue
+DDFileUploaderBase.prototype.uploadQueuePush = function(item) {
+	this.uploadQueue.push(item);
 	if (!this._uploadQueueRunning) {
 		this.startUploadQueue();
 	}
 };
 
-DDFileUploader.prototype.startUploadQueue = function() {
+DDFileUploaderBase.prototype.startUploadQueue = function() {
 	this._uploadQueueRunning = true;
 	this.uploadQueueLoadNext();
 };
 
-
-DDFileUploader.prototype.uploadQueueLoadNext = function() {
-	var slide = this.uploadQueue.shift();
-	if (slide) {
-		this.upload(slide);
+DDFileUploaderBase.prototype.uploadQueueLoadNext = function() {
+	var item = this.uploadQueue.shift();
+	if (item) {
+		this.upload(item);
 	}
 	else {
 		this._uploadQueueRunning = false;
 	}
 };
 
-
-// User interface
-DDFileUploader.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;
-};
-
-DDFileUploader.prototype.updateProgressBar = function(progress) {
-	// 0 <= progress <= 1
-	var size = this.progressBarMaxSize * progress;
-	size = Math.round(size);
-	this.progressBar.style.width = size + 'px';
-};
-
-DDFileUploader.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);
-};
-
 }());