optimisation empreinte mémoire.

[Portfolio.git] / skins / fileupload.js

diff --git a/skins/fileupload.js b/skins/fileupload.js
index da5c08d..c202bfe 100644 (file)
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -2,6 +2,8 @@
 var DDFileUploader;
 
 (function(){
 var DDFileUploader;
 
 (function(){

+// nombre maximun d'image chargées en local
+var MAX_PREVIEW = 2;

 
 DDFileUploader = function(dropbox, uploadUrl) {
        this.dropbox = dropbox;
 
 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.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);});
        var self = this;
        addListener(dropbox, 'dragenter', function(evt){self.dragenter(evt);});
        addListener(dropbox, 'dragover', function(evt){self.dragover(evt);});


@@ -40,31 +47,61 @@ DDFileUploader.prototype.drop = function(evt) {
 
 // Methods about upload
 DDFileUploader.prototype.handleFiles = function(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];
        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 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);});
        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);
        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);
 };
 
        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);
+       var fragment = getCopyOfNode(req.responseXML.documentElement.firstChild);
+       var img = fragment.getElementsByTagName('img')[0];
+       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) {
 };
 
 DDFileUploader.prototype.progressHandler = function(evt) {


@@ -76,16 +113,66 @@ 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();
+               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
 // User interface

-DDFileUploader.prototype.createSlide = function() {
+DDFileUploader.prototype.createSlide = function(file) {

        var slide = document.createElement('span');
        var slide = document.createElement('span');

+       slide.file = file;

 
        var a = document.createElement('a');
        a.href = '#';
        a.className = 'slide';
 
        var img = document.createElement('img');
 
        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) {
        var size = this.thumbnailSize;
        var self = this;
        img.onload = function(evt) {


@@ -97,20 +184,29 @@ DDFileUploader.prototype.createSlide = function() {
                        img.width = Math.round(size * img.width / img.height);
                        img.height = size;
                }
                        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.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);
                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';
 
        var progressBar = document.createElement('span');
        progressBar.className = 'upload-progress';

+       slide.progressBar = progressBar;

 
        slide.appendChild(a);
        slide.appendChild(progressBar);
 
        slide.appendChild(a);
        slide.appendChild(progressBar);

-       this.progressBar = progressBar;
+       slide.appendChild(label);

        this.dropbox.appendChild(slide);
        this.dropbox.appendChild(slide);

+       
+       return slide;

 };
 
 DDFileUploader.prototype.updateProgressBar = function(progress) {
 };
 
 DDFileUploader.prototype.updateProgressBar = function(progress) {


@@ -120,17 +216,16 @@ DDFileUploader.prototype.updateProgressBar = function(progress) {
        this.progressBar.style.width = size + 'px';
 };
 
        this.progressBar.style.width = size + 'px';
 };
 

-DDFileUploader.prototype.previewUploadedImage = function(file) {
+DDFileUploader.prototype.previewUploadedImage = function(slide) {

        var reader = new FileReader();
        var reader = new FileReader();

-       var img = this.previewImg;

        var size = this.thumbnailSize;
        var size = this.thumbnailSize;

-       
-       img.className = 'hidden';
+       var self = this;

        
        reader.onload = function(evt) {
        
        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);

 };
 
 }());
 };
 
 }());