[stable27] Improve upload progress visualization

apps/files/css/upload.scss

@@ -54,7 +54,7 @@
 }
 #uploadprogressbar .ui-progressbar-value.ui-widget-header.ui-corner-left {
 	height: calc(100% + 2px);
-	top: -1px;
+	top: -2px;
 	left: -1px;
 	position: absolute;
 	overflow: hidden;

apps/files/js/file-upload.js

@@ -618,8 +618,10 @@ OC.Uploader.prototype = _.extend({
 		});
 		if (!self._uploading) {
 			self.totalToUpload = 0;
+			self.totalUploadCount = 0;
 		}
 		self.totalToUpload += _.reduce(uploads, function(memo, upload) { return memo+upload.getFile().size; }, 0);
+		self.totalUploadCount += uploads.length;
 		var semaphore = new OCA.Files.Semaphore(5);
 		var promises = _.map(uploads, function(upload) {
 			return semaphore.acquire().then(function(){
@@ -726,8 +728,9 @@ OC.Uploader.prototype = _.extend({
 	},
 
 	showUploadCancelMessage: _.debounce(function() {
-		OC.Notification.show(t('files', 'Upload cancelled.'), {timeout : 7, type: 'error'});
+		OC.Notification.show(t('files', 'Upload cancelled.'), { timeout : 7000, type: 'error' });
 	}, 500),
+
 	/**
 	 * callback for the conflicts dialog
 	 */
@@ -955,6 +958,7 @@ OC.Uploader.prototype = _.extend({
 				type: 'PUT',
 				dropZone: options.dropZone, // restrict dropZone to content div
 				autoUpload: false,
+				progressInterval: 300, // increased from the default of 100ms for more stable behvaviour when predicting remaining time
 				sequentialUploads: false,
 				limitConcurrentUploads: 4,
 				/**
@@ -1197,7 +1201,7 @@ OC.Uploader.prototype = _.extend({
 
 			if (this._supportAjaxUploadWithProgress()) {
 				//remaining time
-				var lastUpdate, lastSize, bufferSize, buffer, bufferIndex, bufferIndex2, bufferTotal;
+				var lastUpdate, lastSize, bufferSize, buffer, bufferIndex, bufferTotal, smoothRemainingSeconds, smoothBitrate;
 
 				var dragging = false;
 
@@ -1215,11 +1219,15 @@ OC.Uploader.prototype = _.extend({
 					// initial remaining time variables
 					lastUpdate   = new Date().getTime();
 					lastSize     = 0;
-					bufferSize   = 20;
+					bufferSize   = 20; // length of the ring buffer
 					buffer       = [];
-					bufferIndex  = 0;
-					bufferIndex2 = 0;
+					bufferIndex  = 0; // index of the ring buffer, runs from 0 to bufferSize continuously 
 					bufferTotal  = 0;
+					newTotal     = 0;
+					smoothing    = 0.02; // smoothing factor for EMA
+					h            = '';
+					bufferFilled = false;
+
 					for(var i = 0; i < bufferSize; i++){
 						buffer[i]  = 0;
 					}
@@ -1238,33 +1246,65 @@ OC.Uploader.prototype = _.extend({
 					var diffUpdate = (thisUpdate - lastUpdate)/1000; // eg. 2s
 					lastUpdate = thisUpdate;
 					var diffSize = data.loaded - lastSize;
+					if (diffSize <= 0) {
+						diffSize = lastSize;
+					}
 					lastSize = data.loaded;
 					diffSize = diffSize / diffUpdate; // apply timing factor, eg. 1MiB/2s = 0.5MiB/s, unit is byte per second
 					var remainingSeconds = ((total - data.loaded) / diffSize);
+
 					if(remainingSeconds >= 0) {
+						// bufferTotal holds the sum of all entries in the buffer, initially 0 like the entries itself
+						// substract current entry from total and add the current value to total
 						bufferTotal = bufferTotal - (buffer[bufferIndex]) + remainingSeconds;
+						// put current value to the entry
 						buffer[bufferIndex] = remainingSeconds; //buffer to make it smoother
+
 						bufferIndex = (bufferIndex + 1) % bufferSize;
-						bufferIndex2++;
 					}
-					var smoothRemainingSeconds;
-					if (bufferIndex2 > 0 && bufferIndex2 < 20) {
-						smoothRemainingSeconds = bufferTotal / bufferIndex2;
-					} else if (bufferSize > 0) {
-						smoothRemainingSeconds = bufferTotal / bufferSize;
+					if (bufferIndex === bufferSize - 1) {
+						bufferFilled = true;
+					}
+					//console.log('#', ' idx: ',bufferIndex, ' Total: ', bufferTotal, ' remainSeconds: ', remainingSeconds, ' during: ', diffUpdate);
+
+					if (smoothRemainingSeconds) {
+						smoothRemainingSeconds = smoothing * (bufferTotal / bufferSize) + ((1-smoothing) * smoothRemainingSeconds);
 					} else {
-						smoothRemainingSeconds = 1;
+						smoothRemainingSeconds = bufferTotal / bufferSize;
 					}
 
-					var h = moment.duration(smoothRemainingSeconds, "seconds").humanize();
-					if (!(smoothRemainingSeconds >= 0 && smoothRemainingSeconds < 14400)) {
-						// show "Uploading ..." for durations longer than 4 hours
-						h = t('files', 'Uploading …');
+					// the number of currently running uploads
+					const runningUploads = Object.keys(self._uploads).length;
+
+					// Only show remaining time if enough buffer information is available and debounce to 1/4
+					if (bufferFilled && bufferIndex % 4 === 0) {
+						h = moment.duration(smoothRemainingSeconds, "seconds").humanize({m: 50, h: 50});
+						if (self.totalUploadCount > 1) {
+							h = t('files', '{remainingTime} ({currentNumber}/{total})', { remainingTime: h, currentNumber: self.totalUploadCount - runningUploads + 1, total: self.totalUploadCount });
+						}
+					}
+
+					// wait for the buffer to be filled and also show "Uploading ..." for durations longer than 4 hours
+					if (!bufferFilled || !(smoothRemainingSeconds >= 0 && smoothRemainingSeconds < 14400)) {
+						// Do not show file index when there is just one
+						if (self.totalUploadCount > 1) {
+							h = t('files', 'Uploading … ({currentNumber}/{total})', { currentNumber: self.totalUploadCount - runningUploads + 1, total: self.totalUploadCount });
+						} else {
+							h = t('files', 'Uploading …');
+						}
+					}
+
+					// smooth bitrate
+					if (smoothBitrate) {
+						smoothBitrate = smoothing * data.bitrate + ((1-smoothing) * smoothBitrate);
+					} else {
+						smoothBitrate = data.bitrate;
 					}
+
 					self._setProgressBarText(h, h, t('files', '{loadedSize} of {totalSize} ({bitrate})' , {
 							loadedSize: OC.Util.humanFileSize(data.loaded),
 							totalSize: OC.Util.humanFileSize(total),
-							bitrate: OC.Util.humanFileSize(data.bitrate / 8) + '/s'
+							bitrate: OC.Util.humanFileSize(smoothBitrate / 8) + '/s'
 						}));
 					self._setProgressBarValue(progress);
 					self.trigger('progressall', e, data);