var DDFileUploader;
(function(){
+// nombre maximun d'image chargées en local
+var MAX_PREVIEW = 5;
-DDFileUploader = function(dropbox) {
+DDFileUploader = function(dropbox, uploadUrl) {
this.dropbox = dropbox;
- var thisDDFU = this;
- addListener(dropbox, 'dragenter', function(evt){thisDDFU.dragenter(evt);});
- addListener(dropbox, 'dragover', function(evt){thisDDFU.dragover(evt);});
- addListener(dropbox, 'drop', function(evt){thisDDFU.drop(evt);});
+ 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);
dt.dropEffect = 'copy';
};
-
DDFileUploader.prototype.drop = function(evt) {
disableDefault(evt);
disablePropagation(evt);
this.handleFiles(dt.files);
};
+// Methods about upload
DDFileUploader.prototype.handleFiles = function(files) {
- var file, i;
+ var file, i, slide;
for (i = 0; i < files.length; i++) {
file = files[i];
- console.log(file.type);
+ 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);
+ slide.innerHTML = req.responseXML.documentElement.firstChild.data;
+ 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();
+ console.info('previewQueueLoadNext', this.previewsLoaded, slide.file.name);
+ this.previewUploadedImage(slide);
+ this.previewsLoaded++;
+ }
+ else {
+ console.warn('previewQueueLoadNext skipped', this.previewsLoaded);
+ 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.round((self.slideSize - img.width) / 2) + 'px';
+ img.style.marginTop = Math.round((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 / Plinn.git / blobdiff