// © 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);
+};
}());
\ No newline at end of file
projects / Portfolio.git / blobdiff