Ré-introduction des images en preview local. Limitation du nombre d'images locales...

[Portfolio.git] / skins / fileupload.js

diff --git a/skins/fileupload.js b/skins/fileupload.js
index da5c08d..65a2984 100644 (file)
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -2,6 +2,8 @@
 var DDFileUploader;
 
 (function(){
+// nombre maximun d'image chargées en local
+var MAX_PREVIEW = 5;
 
 DDFileUploader = function(dropbox, uploadUrl) {
        this.dropbox = dropbox;
@@ -9,6 +11,11 @@ DDFileUploader = function(dropbox, 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);});
@@ -40,31 +47,53 @@ DDFileUploader.prototype.drop = function(evt) {
 
 // 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];
-               this.createSlide();
-               this.previewUploadedImage(file);
-               this.upload(file);
+               slide = this.createSlide(file);
+        this.previewQueuePush(slide);
+        this.uploadQueuePush(slide);
        }
 };
 
-DDFileUploader.prototype.upload = function(file) {
+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.upload, 'load', function(evt){self.uploadCompleteHandler(evt);});
-
-       req.open("PUT", this.uploadUrl + '/' + file.name);
+       addListener(req, 'readystatechange',
+               function(evt) {
+                       if (req.readyState === 4) {
+                               self.uploadCompleteHandler(req);
+                       }
+               });
+
+       req.open("PUT", this.uploadUrl);
        req.setRequestHeader("Content-Type", file.type);
-       addListener(reader, 'load', function(evt){req.sendAsBinary(evt.target.result);});
+       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(evt) {
-       this.progressBar.parentNode.removeChild(this.progressBar);
+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) {
@@ -76,16 +105,68 @@ DDFileUploader.prototype.progressHandler = function(evt) {
        }
 };
 
+// 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() {
+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');
-       this.previewImg = img;
+       img.className = 'hidden';
        var size = this.thumbnailSize;
        var self = this;
        img.onload = function(evt) {
@@ -103,14 +184,23 @@ DDFileUploader.prototype.createSlide = function() {
                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);
-       this.progressBar = progressBar;
+       slide.appendChild(label);
        this.dropbox.appendChild(slide);
+       
+       return slide;
 };
 
 DDFileUploader.prototype.updateProgressBar = function(progress) {
@@ -120,17 +210,16 @@ DDFileUploader.prototype.updateProgressBar = function(progress) {
        this.progressBar.style.width = size + 'px';
 };
 
-DDFileUploader.prototype.previewUploadedImage = function(file) {
+DDFileUploader.prototype.previewUploadedImage = function(slide) {
        var reader = new FileReader();
-       var img = this.previewImg;
        var size = this.thumbnailSize;
-       
-       img.className = 'hidden';
+       var self = this;
        
        reader.onload = function(evt) {
-               img.src = evt.target.result;
+               slide.img.src = evt.target.result;
+               setTimeout(function(){self.previewQueueLoadNext();}, 500);
        };
-       reader.readAsDataURL(file);
+       reader.readAsDataURL(slide.file);
 };
 
 }());