// © 2013 Benoît Pin MINES ParisTech
-var DDFileUploader;
+var DDFileUploaderBase;
(function(){
-// nombre maximun d'image chargées en local
-var MAX_PREVIEW = 2;
-DDFileUploader = function(dropbox, uploadUrl) {
+DDFileUploaderBase = 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;
};
// Drag and drop
-DDFileUploader.prototype.dragenter = function(evt) {
+DDFileUploaderBase.prototype.dragenter = function(evt) {
disableDefault(evt);
disablePropagation(evt);
};
-DDFileUploader.prototype.dragover = function(evt) {
+DDFileUploaderBase.prototype.dragover = function(evt) {
disableDefault(evt);
disablePropagation(evt);
evt = getEventObject(evt);
dt.dropEffect = 'copy';
};
-DDFileUploader.prototype.drop = function(evt) {
+DDFileUploaderBase.prototype.drop = function(evt) {
disableDefault(evt);
disablePropagation(evt);
getEventObject(evt);
};
// 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);
- }
+DDFileUploaderBase.prototype.handleFiles = function(files) {
+ // To be implemented by descendant.
+};
+
+
+
+DDFileUploaderBase.prototype.beforeUpload = function(item) {
+ // To be implemented by decendant.
};
-DDFileUploader.prototype.upload = function(slide) {
+
+DDFileUploaderBase.prototype.upload = function(item) {
+ // item.file must be the file to be uploaded
+ this.beforeUpload(item);
var reader = new FileReader();
var req = new XMLHttpRequest();
- var file = slide.file;
- this.uploadedSlide = slide;
- this.previewImg = slide.img;
- this.progressBar = slide.progressBar;
+ var file = item.file;
+
var self = this;
addListener(req.upload, 'progress', function(evt){self.progressHandler(evt);});
reader.readAsBinaryString(file);
};
-DDFileUploader.prototype.uploadCompleteHandler = function(req) {
+DDFileUploaderBase.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);
- };
+ 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();
};
-DDFileUploader.prototype.progressHandler = function(evt) {
+DDFileUploaderBase.prototype.progressHandler = function(evt) {
if (evt.lengthComputable) {
var progress = evt.loaded / evt.total;
this.updateProgressBar(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);
+// Methods about queue
+DDFileUploaderBase.prototype.uploadQueuePush = function(item) {
+ this.uploadQueue.push(item);
if (!this._uploadQueueRunning) {
this.startUploadQueue();
}
};
-DDFileUploader.prototype.startUploadQueue = function() {
+DDFileUploaderBase.prototype.startUploadQueue = function() {
this._uploadQueueRunning = true;
this.uploadQueueLoadNext();
};
-
-DDFileUploader.prototype.uploadQueueLoadNext = function() {
- var slide = this.uploadQueue.shift();
- if (slide) {
- this.upload(slide);
+DDFileUploaderBase.prototype.uploadQueueLoadNext = function() {
+ var item = this.uploadQueue.shift();
+ if (item) {
+ this.upload(item);
}
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 / Plinn.git / blobdiff