X-Git-Url: https://scm.cri.mines-paristech.fr/git/Plinn.git/blobdiff_plain/e311b4c86acdfe7fd6b930436d49852e5ebfc75d..6f71934230126c5d64b3e8fbcf28e14dc8fab812:/skins/fileupload.js

diff --git a/skins/fileupload.js b/skins/fileupload.js
index 04fde67..3f5f8c5 100644
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -2,15 +2,20 @@
 var DDFileUploader;
 
 (function(){
+// nombre maximun d'image chargées en local
+var MAX_PREVIEW = 2;
+var isThumbnail = /.*\/getThumbnail$/;
 
 DDFileUploader = 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;
@@ -19,6 +24,18 @@ DDFileUploader = function(dropbox, uploadUrl) {
 	addListener(dropbox, 'drop', function(evt){self.drop(evt);});
 };
 
+DDFileUploader.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
 DDFileUploader.prototype.dragenter = function(evt) {
 	disableDefault(evt);
@@ -48,7 +65,7 @@ DDFileUploader.prototype.handleFiles = function(files) {
 	for (i = 0; i < files.length; i++) {
 		file = files[i];
 		slide = this.createSlide(file);
-        // this.previewQueuePush(slide);
+        this.previewQueuePush(slide);
         this.uploadQueuePush(slide);
 	}
 };
@@ -63,10 +80,9 @@ DDFileUploader.prototype.upload = function(slide) {
 	var self = this;
 	
 	addListener(req.upload, 'progress', function(evt){self.progressHandler(evt);});
-	// addListener(req.upload, 'load', function(evt){self.uploadCompleteHandler(evt, req);});
 	addListener(req, 'readystatechange',
 		function(evt) {
-			if (req.readyState == 4) {
+			if (req.readyState === 4) {
 				self.uploadCompleteHandler(req);
 			}
 		});
@@ -88,7 +104,31 @@ DDFileUploader.prototype.uploadCompleteHandler = function(req) {
 	var slide = this.uploadedSlide;
 	this.uploadedSlide.removeChild(slide.label);
     this.uploadedSlide.removeChild(slide.progressBar);
-	slide.innerHTML = req.responseXML.documentElement.firstChild.data;
+	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();
 };
 
@@ -116,9 +156,10 @@ DDFileUploader.prototype.startPreviewQueue = function() {
 };
 
 DDFileUploader.prototype.previewQueueLoadNext = function() {
-	var slide = this.previewQueue.shift();
-	if (slide) {
+	if (this.previewQueue.length && this.previewsLoaded < MAX_PREVIEW) {
+		var slide = this.previewQueue.shift();
 		this.previewUploadedImage(slide);
+		this.previewsLoaded++;
 	}
 	else {
 		this._previewQueueRunning = false;
@@ -171,8 +212,8 @@ DDFileUploader.prototype.createSlide = function(file) {
 			img.width = Math.round(size * img.width / img.height);
 			img.height = size;
 		}
-		img.style.marginLeft = Math.round((self.slideSize - img.width) / 2) + 'px';
-		img.style.marginTop = Math.round((self.slideSize - img.height) / 2) + 'px';
+		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;
 	};