Début de refactoring du javascript pour rendre l'upload non spécifique à la photo.

[Plinn.git] / skins / fileupload.js

diff --git a/skins/fileupload.js b/skins/fileupload.js
index 42616a9..4061a0c 100644 (file)
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -1,26 +1,48 @@
 // © 2013 Benoît Pin MINES ParisTech
 // © 2013 Benoît Pin MINES ParisTech

-var DDFileUploader;
+var DDFileUploaderBase;

 
 (function(){
 
 (function(){

+// nombre maximun d'image chargées en local
+var MAX_PREVIEW = 2;
+var isThumbnail = /.*\/getThumbnail$/;

 
 

-DDFileUploader = function(dropbox, uploadUrl) {
+DDFileUploaderBase = function(dropbox, uploadUrl) {

        this.dropbox = dropbox;
        this.dropbox = dropbox;

+       this.existingSlides = this.indexExistingSlides();

        this.uploadUrl = uploadUrl;
        this.slideSize = 222;
        this.progressBarMaxSize = 200; // pixels
        this.thumbnailSize = 180;
        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);});
 };
 
        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);});
 };
 

-DDFileUploader.prototype.dragenter = function(evt) {
+DDFileUploaderBase.prototype.indexExistingSlides = function() {
+       var images = this.dropbox.getElementsByTagName('img');
+       var i;
+       var index = [];
+       for (i=0 ; i < images.length ; i++) {
+               if (isThumbnail.test(images[i].src)) {
+                       index[images[i].src] = images[i];
+               }
+       }
+       return index;
+};
+
+// Drag and drop
+DDFileUploaderBase.prototype.dragenter = function(evt) {

        disableDefault(evt);
        disablePropagation(evt);
 };
 
        disableDefault(evt);
        disablePropagation(evt);
 };
 

-DDFileUploader.prototype.dragover = function(evt) {
+DDFileUploaderBase.prototype.dragover = function(evt) {

        disableDefault(evt);
        disablePropagation(evt);
        evt = getEventObject(evt);
        disableDefault(evt);
        disablePropagation(evt);
        evt = getEventObject(evt);


@@ -28,8 +50,7 @@ DDFileUploader.prototype.dragover = function(evt) {
        dt.dropEffect = 'copy';
 };
 
        dt.dropEffect = 'copy';
 };
 

-
-DDFileUploader.prototype.drop = function(evt) {
+DDFileUploaderBase.prototype.drop = function(evt) {

        disableDefault(evt);
        disablePropagation(evt);
        getEventObject(evt);
        disableDefault(evt);
        disablePropagation(evt);
        getEventObject(evt);


@@ -38,26 +59,148 @@ DDFileUploader.prototype.drop = function(evt) {
        this.handleFiles(dt.files);
 };
 
        this.handleFiles(dt.files);
 };
 

-DDFileUploader.prototype.handleFiles = function(files) {
-       var file, i;
+// Methods about upload
+DDFileUploaderBase.prototype.handleFiles = function(files) {
+       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);
+       }
+};
+
+DDFileUploaderBase.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);
+};
+
+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];
+       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();
+};
+
+DDFileUploaderBase.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
+
+DDFileUploaderBase.prototype.previewQueuePush = function(slide) {
+       this.previewQueue.push(slide);
+       if (!this._previewQueueRunning) {
+               this.startPreviewQueue();
+       }
+};
+
+DDFileUploaderBase.prototype.startPreviewQueue = function() {
+       this._previewQueueRunning = true;
+       this.previewQueueLoadNext();
+};
+
+DDFileUploaderBase.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;
+       }
+};
+
+DDFileUploaderBase.prototype.uploadQueuePush = function(slide) {
+       this.uploadQueue.push(slide);
+       if (!this._uploadQueueRunning) {
+               this.startUploadQueue();
+       }
+};
+
+DDFileUploaderBase.prototype.startUploadQueue = function() {
+       this._uploadQueueRunning = true;
+       this.uploadQueueLoadNext();
+};
+
+
+DDFileUploaderBase.prototype.uploadQueueLoadNext = function() {
+       var slide = this.uploadQueue.shift();
+       if (slide) {
+               this.upload(slide);
+       }
+       else {
+               this._uploadQueueRunning = false;

        }
 };
 
 
        }
 };
 
 

-DDFileUploader.prototype.createSlide = function() {
+// User interface
+DDFileUploaderBase.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) {


@@ -69,69 +212,48 @@ 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.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) {
+DDFileUploaderBase.prototype.updateProgressBar = function(progress) {

        // 0 <= progress <= 1
        var size = this.progressBarMaxSize * progress;
        size = Math.round(size);
        this.progressBar.style.width = size + 'px';
        // 0 <= progress <= 1
        var size = this.progressBarMaxSize * progress;
        size = Math.round(size);
        this.progressBar.style.width = size + 'px';

-}
-
-
-DDFileUploader.prototype.upload = function(file) {
-       var reader = new FileReader();
-       var req = new XMLHttpRequest();
-       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);
-       req.setRequestHeader("Content-Type", file.type);
-       addListener(reader, 'load', function(evt){req.sendAsBinary(evt.target.result);})
-       // reader.onload = function(evt) {
-       //      req.sendAsBinary(evt.target.result);
-       // };
-       reader.readAsBinaryString(file);
-};
-
-DDFileUploader.prototype.uploadCompleteHandler = function(evt) {
-       this.progressBar.parentNode.removeChild(this.progressBar);

 };
 
 };
 

-DDFileUploader.prototype.progressHandler = function(evt) {
-       if (evt.lengthComputable) {
-               var progress = evt.loaded / evt.total;
-               this.updateProgressBar(progress);
-               this.previewImg.style.opacity=progress;
-       }
-};
-
-DDFileUploader.prototype.previewUploadedImage = function(file) {
+DDFileUploaderBase.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);

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