-// © 2013 Benoît Pin MINES ParisTech
-var DDFileUploader;
-
-(function(){
-// nombre maximun d'image chargées en local
-var MAX_PREVIEW = 2;
-
-DDFileUploader = 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;
- 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
-DDFileUploader.prototype.dragenter = function(evt) {
- disableDefault(evt);
- disablePropagation(evt);
-};
-
-DDFileUploader.prototype.dragover = function(evt) {
- disableDefault(evt);
- disablePropagation(evt);
- evt = getEventObject(evt);
- var dt = evt.dataTransfer;
- dt.dropEffect = 'copy';
-};
-
-DDFileUploader.prototype.drop = function(evt) {
- disableDefault(evt);
- disablePropagation(evt);
- getEventObject(evt);
- var dt = evt.dataTransfer;
- dt.dropEffect = 'copy';
- this.handleFiles(dt.files);
-};
-
-// 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);
- }
-};
-
-DDFileUploader.prototype.upload = function(slide) {
- var reader = new FileReader();
- var req = new XMLHttpRequest();
- var file = slide.file;
- this.uploadedSlide = slide;
- this.previewImg = slide.img;
- this.progressBar = slide.progressBar;
- 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);
-};
-
-DDFileUploader.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);
- };
- 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();
-};
-
-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;
- }
-};
-
-DDFileUploader.prototype.uploadQueuePush = function(slide) {
- this.uploadQueue.push(slide);
- if (!this._uploadQueueRunning) {
- this.startUploadQueue();
- }
-};
-
-DDFileUploader.prototype.startUploadQueue = function() {
- this._uploadQueueRunning = true;
- this.uploadQueueLoadNext();
-};
-
-
-DDFileUploader.prototype.uploadQueueLoadNext = function() {
- var slide = this.uploadQueue.shift();
- if (slide) {
- this.upload(slide);
- }
- 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);
-};
-
-}());
projects / Portfolio.git / blobdiff