Upgrade to ExtJS 4.0.0 - Released 04/26/2011
[extjs.git] / examples / image-organizer / SWFUpload / plugins / swfupload.speed.js
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-/*!
- * Ext JS Library 3.2.2
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-/*
-       Speed Plug-in
-       
-       Features:
-               *Adds several properties to the 'file' object indicated upload speed, time left, upload time, etc.
-                       - currentSpeed -- String indicating the upload speed, bytes per second
-                       - averageSpeed -- Overall average upload speed, bytes per second
-                       - movingAverageSpeed -- Speed over averaged over the last several measurements, bytes per second
-                       - timeRemaining -- Estimated remaining upload time in seconds
-                       - timeElapsed -- Number of seconds passed for this upload
-                       - percentUploaded -- Percentage of the file uploaded (0 to 100)
-                       - sizeUploaded -- Formatted size uploaded so far, bytes
-               
-               *Adds setting 'moving_average_history_size' for defining the window size used to calculate the moving average speed.
-               
-               *Adds several Formatting functions for formatting that values provided on the file object.
-                       - SWFUpload.speed.formatBPS(bps) -- outputs string formatted in the best units (Gbps, Mbps, Kbps, bps)
-                       - SWFUpload.speed.formatTime(seconds) -- outputs string formatted in the best units (x Hr y M z S)
-                       - SWFUpload.speed.formatSize(bytes) -- outputs string formatted in the best units (w GB x MB y KB z B )
-                       - SWFUpload.speed.formatPercent(percent) -- outputs string formatted with a percent sign (x.xx %)
-                       - SWFUpload.speed.formatUnits(baseNumber, divisionArray, unitLabelArray, fractionalBoolean)
-                               - Formats a number using the division array to determine how to apply the labels in the Label Array
-                               - factionalBoolean indicates whether the number should be returned as a single fractional number with a unit (speed)
-                                   or as several numbers labeled with units (time)
-       */
-
-var SWFUpload;
-if (typeof(SWFUpload) === "function") {
-       SWFUpload.speed = {};
-       
-       SWFUpload.prototype.initSettings = (function (oldInitSettings) {
-               return function () {
-                       if (typeof(oldInitSettings) === "function") {
-                               oldInitSettings.call(this);
-                       }
-                       
-                       this.ensureDefault = function (settingName, defaultValue) {
-                               this.settings[settingName] = (this.settings[settingName] == undefined) ? defaultValue : this.settings[settingName];
-                       };
-
-                       // List used to keep the speed stats for the files we are tracking
-                       this.fileSpeedStats = {};
-                       this.speedSettings = {};
-
-                       this.ensureDefault("moving_average_history_size", "10");
-                       
-                       this.speedSettings.user_file_queued_handler = this.settings.file_queued_handler;
-                       this.speedSettings.user_file_queue_error_handler = this.settings.file_queue_error_handler;
-                       this.speedSettings.user_upload_start_handler = this.settings.upload_start_handler;
-                       this.speedSettings.user_upload_error_handler = this.settings.upload_error_handler;
-                       this.speedSettings.user_upload_progress_handler = this.settings.upload_progress_handler;
-                       this.speedSettings.user_upload_success_handler = this.settings.upload_success_handler;
-                       this.speedSettings.user_upload_complete_handler = this.settings.upload_complete_handler;
-                       
-                       this.settings.file_queued_handler = SWFUpload.speed.fileQueuedHandler;
-                       this.settings.file_queue_error_handler = SWFUpload.speed.fileQueueErrorHandler;
-                       this.settings.upload_start_handler = SWFUpload.speed.uploadStartHandler;
-                       this.settings.upload_error_handler = SWFUpload.speed.uploadErrorHandler;
-                       this.settings.upload_progress_handler = SWFUpload.speed.uploadProgressHandler;
-                       this.settings.upload_success_handler = SWFUpload.speed.uploadSuccessHandler;
-                       this.settings.upload_complete_handler = SWFUpload.speed.uploadCompleteHandler;
-                       
-                       delete this.ensureDefault;
-               };
-       })(SWFUpload.prototype.initSettings);
-
-       
-       SWFUpload.speed.fileQueuedHandler = function (file) {
-               if (typeof this.speedSettings.user_file_queued_handler === "function") {
-                       file = SWFUpload.speed.extendFile(file);
-                       
-                       return this.speedSettings.user_file_queued_handler.call(this, file);
-               }
-       };
-       
-       SWFUpload.speed.fileQueueErrorHandler = function (file, errorCode, message) {
-               if (typeof this.speedSettings.user_file_queue_error_handler === "function") {
-                       file = SWFUpload.speed.extendFile(file);
-                       
-                       return this.speedSettings.user_file_queue_error_handler.call(this, file, errorCode, message);
-               }
-       };
-
-       SWFUpload.speed.uploadStartHandler = function (file) {
-               if (typeof this.speedSettings.user_upload_start_handler === "function") {
-                       file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
-                       return this.speedSettings.user_upload_start_handler.call(this, file);
-               }
-       };
-       
-       SWFUpload.speed.uploadErrorHandler = function (file, errorCode, message) {
-               file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
-               SWFUpload.speed.removeTracking(file, this.fileSpeedStats);
-
-               if (typeof this.speedSettings.user_upload_error_handler === "function") {
-                       return this.speedSettings.user_upload_error_handler.call(this, file, errorCode, message);
-               }
-       };
-       SWFUpload.speed.uploadProgressHandler = function (file, bytesComplete, bytesTotal) {
-               this.updateTracking(file, bytesComplete);
-               file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
-
-               if (typeof this.speedSettings.user_upload_progress_handler === "function") {
-                       return this.speedSettings.user_upload_progress_handler.call(this, file, bytesComplete, bytesTotal);
-               }
-       };
-       
-       SWFUpload.speed.uploadSuccessHandler = function (file, serverData) {
-               if (typeof this.speedSettings.user_upload_success_handler === "function") {
-                       file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
-                       return this.speedSettings.user_upload_success_handler.call(this, file, serverData);
-               }
-       };
-       SWFUpload.speed.uploadCompleteHandler = function (file) {
-               file = SWFUpload.speed.extendFile(file, this.fileSpeedStats);
-               SWFUpload.speed.removeTracking(file, this.fileSpeedStats);
-
-               if (typeof this.speedSettings.user_upload_complete_handler === "function") {
-                       return this.speedSettings.user_upload_complete_handler.call(this, file);
-               }
-       };
-       
-       // Private: extends the file object with the speed plugin values
-       SWFUpload.speed.extendFile = function (file, trackingList) {
-               var tracking;
-               
-               if (trackingList) {
-                       tracking = trackingList[file.id];
-               }
-               
-               if (tracking) {
-                       file.currentSpeed = tracking.currentSpeed;
-                       file.averageSpeed = tracking.averageSpeed;
-                       file.movingAverageSpeed = tracking.movingAverageSpeed;
-                       file.timeRemaining = tracking.timeRemaining;
-                       file.timeElapsed = tracking.timeElapsed;
-                       file.percentUploaded = tracking.percentUploaded;
-                       file.sizeUploaded = tracking.bytesUploaded;
-
-               } else {
-                       file.currentSpeed = 0;
-                       file.averageSpeed = 0;
-                       file.movingAverageSpeed = 0;
-                       file.timeRemaining = 0;
-                       file.timeElapsed = 0;
-                       file.percentUploaded = 0;
-                       file.sizeUploaded = 0;
-               }
-               
-               return file;
-       };
-       
-       // Private: Updates the speed tracking object, or creates it if necessary
-       SWFUpload.prototype.updateTracking = function (file, bytesUploaded) {
-               var tracking = this.fileSpeedStats[file.id];
-               if (!tracking) {
-                       this.fileSpeedStats[file.id] = tracking = {};
-               }
-               
-               // Sanity check inputs
-               bytesUploaded = bytesUploaded || tracking.bytesUploaded || 0;
-               if (bytesUploaded < 0) {
-                       bytesUploaded = 0;
-               }
-               if (bytesUploaded > file.size) {
-                       bytesUploaded = file.size;
-               }
-               
-               var tickTime = (new Date()).getTime();
-               if (!tracking.startTime) {
-                       tracking.startTime = (new Date()).getTime();
-                       tracking.lastTime = tracking.startTime;
-                       tracking.currentSpeed = 0;
-                       tracking.averageSpeed = 0;
-                       tracking.movingAverageSpeed = 0;
-                       tracking.movingAverageHistory = [];
-                       tracking.timeRemaining = 0;
-                       tracking.timeElapsed = 0;
-                       tracking.percentUploaded = bytesUploaded / file.size;
-                       tracking.bytesUploaded = bytesUploaded;
-               } else if (tracking.startTime > tickTime) {
-                       this.debug("When backwards in time");
-               } else {
-                       // Get time and deltas
-                       var now = (new Date()).getTime();
-                       var lastTime = tracking.lastTime;
-                       var deltaTime = now - lastTime;
-                       var deltaBytes = bytesUploaded - tracking.bytesUploaded;
-                       
-                       if (deltaBytes === 0 || deltaTime === 0) {
-                               return tracking;
-                       }
-                       
-                       // Update tracking object
-                       tracking.lastTime = now;
-                       tracking.bytesUploaded = bytesUploaded;
-                       
-                       // Calculate speeds
-                       tracking.currentSpeed = (deltaBytes * 8 ) / (deltaTime / 1000);
-                       tracking.averageSpeed = (tracking.bytesUploaded * 8) / ((now - tracking.startTime) / 1000);
-
-                       // Calculate moving average
-                       tracking.movingAverageHistory.push(tracking.currentSpeed);
-                       if (tracking.movingAverageHistory.length > this.settings.moving_average_history_size) {
-                               tracking.movingAverageHistory.shift();
-                       }
-                       
-                       tracking.movingAverageSpeed = SWFUpload.speed.calculateMovingAverage(tracking.movingAverageHistory);
-                       
-                       // Update times
-                       tracking.timeRemaining = (file.size - tracking.bytesUploaded) * 8 / tracking.movingAverageSpeed;
-                       tracking.timeElapsed = (now - tracking.startTime) / 1000;
-                       
-                       // Update percent
-                       tracking.percentUploaded = (tracking.bytesUploaded / file.size * 100);
-               }
-               
-               return tracking;
-       };
-       SWFUpload.speed.removeTracking = function (file, trackingList) {
-               try {
-                       trackingList[file.id] = null;
-                       delete trackingList[file.id];
-               } catch (ex) {
-               }
-       };
-       
-       SWFUpload.speed.formatUnits = function (baseNumber, unitDivisors, unitLabels, singleFractional) {
-               var i, unit, unitDivisor, unitLabel;
-
-               if (baseNumber === 0) {
-                       return "0 " + unitLabels[unitLabels.length - 1];
-               }
-               
-               if (singleFractional) {
-                       unit = baseNumber;
-                       unitLabel = unitLabels.length >= unitDivisors.length ? unitLabels[unitDivisors.length - 1] : "";
-                       for (i = 0; i < unitDivisors.length; i++) {
-                               if (baseNumber >= unitDivisors[i]) {
-                                       unit = (baseNumber / unitDivisors[i]).toFixed(2);
-                                       unitLabel = unitLabels.length >= i ? " " + unitLabels[i] : "";
-                                       break;
-                               }
-                       }
-                       
-                       return unit + unitLabel;
-               } else {
-                       var formattedStrings = [];
-                       var remainder = baseNumber;
-                       
-                       for (i = 0; i < unitDivisors.length; i++) {
-                               unitDivisor = unitDivisors[i];
-                               unitLabel = unitLabels.length > i ? " " + unitLabels[i] : "";
-                               
-                               unit = remainder / unitDivisor;
-                               if (i < unitDivisors.length -1) {
-                                       unit = Math.floor(unit);
-                               } else {
-                                       unit = unit.toFixed(2);
-                               }
-                               if (unit > 0) {
-                                       remainder = remainder % unitDivisor;
-                                       
-                                       formattedStrings.push(unit + unitLabel);
-                               }
-                       }
-                       
-                       return formattedStrings.join(" ");
-               }
-       };
-       
-       SWFUpload.speed.formatBPS = function (baseNumber) {
-               var bpsUnits = [1073741824, 1048576, 1024, 1], bpsUnitLabels = ["Gbps", "Mbps", "Kbps", "bps"];
-               return SWFUpload.speed.formatUnits(baseNumber, bpsUnits, bpsUnitLabels, true);
-       
-       };
-       SWFUpload.speed.formatTime = function (baseNumber) {
-               var timeUnits = [86400, 3600, 60, 1], timeUnitLabels = ["d", "h", "m", "s"];
-               return SWFUpload.speed.formatUnits(baseNumber, timeUnits, timeUnitLabels, false);
-       
-       };
-       SWFUpload.speed.formatBytes = function (baseNumber) {
-               var sizeUnits = [1073741824, 1048576, 1024, 1], sizeUnitLabels = ["GB", "MB", "KB", "bytes"];
-               return SWFUpload.speed.formatUnits(baseNumber, sizeUnits, sizeUnitLabels, true);
-       
-       };
-       SWFUpload.speed.formatPercent = function (baseNumber) {
-               return baseNumber.toFixed(2) + " %";
-       };
-       
-       SWFUpload.speed.calculateMovingAverage = function (history) {
-               var vals = [], size, sum = 0.0, mean = 0.0, varianceTemp = 0.0, variance = 0.0, standardDev = 0.0;
-               var i;
-               var mSum = 0, mCount = 0;
-               
-               size = history.length;
-               
-               // Check for sufficient data
-               if (size >= 8) {
-                       // Clone the array and Calculate sum of the values 
-                       for (i = 0; i < size; i++) {
-                               vals[i] = history[i];
-                               sum += vals[i];
-                       }
-
-                       mean = sum / size;
-
-                       // Calculate variance for the set
-                       for (i = 0; i < size; i++) {
-                               varianceTemp += Math.pow((vals[i] - mean), 2);
-                       }
-
-                       variance = varianceTemp / size;
-                       standardDev = Math.sqrt(variance);
-                       
-                       //Standardize the Data
-                       for (i = 0; i < size; i++) {
-                               vals[i] = (vals[i] - mean) / standardDev;
-                       }
-
-                       // Calculate the average excluding outliers
-                       var deviationRange = 2.0;
-                       for (i = 0; i < size; i++) {
-                               
-                               if (vals[i] <= deviationRange && vals[i] >= -deviationRange) {
-                                       mCount++;
-                                       mSum += history[i];
-                               }
-                       }
-                       
-               } else {
-                       // Calculate the average (not enough data points to remove outliers)
-                       mCount = size;
-                       for (i = 0; i < size; i++) {
-                               mSum += history[i];
-                       }
-               }
-
-               return mSum / mCount;
-       };
-       
-}
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