X-Git-Url: https://svn.cri.ensmp.fr/git/Portfolio.git/blobdiff_plain/5e46a54e179d7011976c89886f0a1ecca1b46f20..6f4e2f7cda25365c0ca9d1597270200d049daa61:/skins/portfolio_upload.js

diff --git a/skins/portfolio_upload.js b/skins/portfolio_upload.js
index 1309397..87a70e4 100644
--- a/skins/portfolio_upload.js
+++ b/skins/portfolio_upload.js
@@ -1,12 +1,187 @@
 // © 2013 Benoît Pin MINES ParisTech
 
-var DDFileUploader;
+var DDImageUploader;
 
 (function(){
-DDFileUploader = function(dropbox, uploadUrl) {
+// nombre maximun d'image chargées en local
+var MAX_PREVIEW = 2;
+var isThumbnail = /.*\/getThumbnail$/;
+
+DDImageUploader = function(dropbox, uploadUrl, options) {
 	DDFileUploaderBase.apply(this, [dropbox, uploadUrl]);
+
+	this.existingSlides = this.indexExistingSlides();
+	this.slideSize = options.slideSize || 222; // pixels
+	this.progressBarMaxSize = this.slideSize - 22 || 200; 
+	this.thumbnailSize = options.thumbnailSize || 180;
+	this.previewQueue = [];
+	this._previewQueueRunning = false;
+	this.previewsLoaded = 0;
+};
+
+copyPrototype(DDImageUploader, DDFileUploaderBase);
+
+DDImageUploader.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;
+};
+
+// Methods about upload.
+DDImageUploader.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);
+	}
+};
+
+DDImageUploader.prototype.beforeUpload = function(slide) {
+	this.uploadedSlide = slide;
+	this.previewImg = slide.img;
+	this.progressBar = slide.progressBar;
+	this.scrollToSlide(slide);
+};
+
+DDImageUploader.prototype.scrollToSlide = function(slide) {
+	var slideHeight = slide.offsetHeight;
+	var slideOffsetTop = slide.getElementsByClassName('slide')[0].offsetTop;
+	var to = slideOffsetTop - getWindowHeight() + slideHeight;
+	window.scroll(0, to);
+};
+
+DDImageUploader.prototype.uploadCompleteHandlerCB = 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();
+};
+
+DDImageUploader.prototype.progressHandlerCB = function(progress) {
+	this.updateProgressBar(progress);
+	var currentOpacity = this.previewImg.style.opacity;
+	this.previewImg.style.opacity = Math.max(currentOpacity, progress);
 };
 
-copyPrototype(DDFileUploader, DDFileUploaderBase);
+// Methods about preview queue.
+DDImageUploader.prototype.previewQueuePush = function(slide) {
+	this.previewQueue.push(slide);
+	if (!this._previewQueueRunning) {
+		this.startPreviewQueue();
+	}
+};
+
+DDImageUploader.prototype.startPreviewQueue = function() {
+	this._previewQueueRunning = true;
+	this.previewQueueLoadNext();
+};
+
+DDImageUploader.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;
+	}
+};
+
+// User interface
+DDImageUploader.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;
+};
+
+DDImageUploader.prototype.updateProgressBar = function(progress) {
+	// 0 <= progress <= 1
+	var size = this.progressBarMaxSize * progress;
+	size = Math.round(size);
+	this.progressBar.style.width = size + 'px';
+};
+
+DDImageUploader.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);
+};
 
 }());
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