chrome/browser/resources/chromeos/provided_file_systems.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 <include src="../../../../third_party/polymer_legacy/platform/platform.js">
   6 <include src="../../../../third_party/polymer_legacy/polymer/polymer.js">
   7
   8 /**
   9  * Formats size to a human readable form.
  10  * @param {number} size Size in bytes.
  11  * @return {string} Output string in a human-readable format.
  12  */
  13 function formatSizeCommon(size) {
  14   if (size < 1024)
  15     return size + ' B';
  16   if (size < 1024 * 1024)
  17     return Math.round(size / 1024) + ' KB';
  18   return Math.round(size / 1024 / 1024) + ' MB';
  19 }
  20
  21 // Defines the file-systems element.
  22 Polymer('file-systems', {
  23   /**
  24    * Called when the element is created.
  25    */
  26   ready: function() {
  27   },
  28
  29   /**
  30    * Selects an active file system from the list.
  31    * @param {Event} event Event.
  32    * @param {number} detail Detail.
  33    * @param {HTMLElement} sender Sender.
  34    */
  35   rowClicked: function(event, detail, sender) {
  36     var requestEventsNode = document.querySelector('#request-events');
  37     requestEventsNode.hidden = false;
  38     requestEventsNode.model = [];
  39
  40     var requestTimelineNode = document.querySelector('#request-timeline');
  41     requestTimelineNode.hidden = false;
  42     requestTimelineNode.model = [];
  43
  44     chrome.send('selectFileSystem', [sender.dataset.extensionId,
  45       sender.dataset.id]);
  46   },
  47
  48   /**
  49    * List of provided file system information maps.
  50    * @type {Array.<Object>}
  51    */
  52   model: []
  53 });
  54
  55 // Defines the request-log element.
  56 Polymer('request-events', {
  57   /**
  58    * Called when the element is created.
  59    */
  60   ready: function() {
  61   },
  62
  63   /**
  64    * Formats time to a hh:mm:ss.xxxx format.
  65    * @param {Date} time Input time.
  66    * @return {string} Output string in a human-readable format.
  67    */
  68   formatTime: function(time) {
  69     return ('0' + time.getHours()).slice(-2) + ':' +
  70            ('0' + time.getMinutes()).slice(-2) + ':' +
  71            ('0' + time.getSeconds()).slice(-2) + '.' +
  72            ('000' + time.getMilliseconds()).slice(-3);
  73   },
  74
  75   /**
  76    * Formats size to a human readable form.
  77    * @param {number} size Size in bytes.
  78    * @return {string} Output string in a human-readable format.
  79    */
  80   formatSize: function(size) {
  81     return formatSizeCommon(size);
  82   },
  83
  84   /**
  85    * Formats a boolean value to human-readable form.
  86    * @param {boolean=} opt_hasMore Input value.
  87    * @return {string} Output string in a human-readable format.
  88    */
  89   formatHasMore: function(opt_hasMore) {
  90     if (opt_hasMore == undefined)
  91       return '';
  92
  93     return opt_hasMore ? 'HAS_MORE' : 'LAST';
  94   },
  95
  96   /**
  97    * Formats execution time to human-readable form.
  98    * @param {boolean=} opt_executionTime Input value.
  99    * @return {string} Output string in a human-readable format.
 100    */
 101   formatExecutionTime: function(opt_executionTime) {
 102     if (opt_executionTime == undefined)
 103       return '';
 104
 105     return opt_executionTime + ' ms';
 106   },
 107
 108   /**
 109    * List of events.
 110    * @type {Array.<Object>}
 111    */
 112   model: []
 113 });
 114
 115 // Defines the request-timeline element.
 116 Polymer('request-timeline', {
 117   /**
 118    * Step for zoomin in and out.
 119    * @type {number}
 120    * @const
 121    */
 122   SCALE_STEP: 1.5,
 123
 124   /**
 125    * Height of each row in the chart in pixels.
 126    * @type {number}
 127    * @const
 128    */
 129   ROW_HEIGHT: 14,
 130
 131   /**
 132    * Observes changes in the model.
 133    * @type {Object.<string, string>}
 134    */
 135   observe: {
 136     'model.length': 'chartUpdate'
 137   },
 138
 139   /**
 140    * Called when the element is created.
 141    */
 142   ready: function() {
 143     // Update active requests in the background for nice animation.
 144     var activeUpdateAnimation = function() {
 145       this.activeUpdate();
 146       requestAnimationFrame(activeUpdateAnimation);
 147     }.bind(this);
 148     activeUpdateAnimation();
 149   },
 150
 151   /**
 152    * Formats size to a human readable form.
 153    * @param {number} size Size in bytes.
 154    * @return {string} Output string in a human-readable format.
 155    */
 156   formatSize: function(size) {
 157     return formatSizeCommon(size);
 158   },
 159
 160   /**
 161    * Zooms in the timeline.
 162    * @param {Event} event Event.
 163    * @param {number} detail Detail.
 164    * @param {HTMLElement} sender Sender.
 165    */
 166   zoomInClicked: function(event, detail, sender) {
 167     this.scale *= this.SCALE_STEP;
 168   },
 169
 170   /**
 171    * Zooms out the timeline.
 172    * @param {Event} event Event.
 173    * @param {number} detail Detail.
 174    * @param {HTMLElement} sender Sender.
 175    */
 176   zoomOutClicked: function(event, detail, sender) {
 177     this.scale /= this.SCALE_STEP;
 178   },
 179
 180   /**
 181    * Selects or deselects an element on the timeline.
 182    * @param {Event} event Event.
 183    * @param {number} detail Detail.
 184    * @param {HTMLElement} sender Sender.
 185    */
 186   elementClicked: function(event, detail, sender) {
 187     if (sender.dataset.id in this.selected) {
 188       delete this.selected[sender.dataset.id];
 189       sender.classList.remove('selected');
 190     } else {
 191       this.selected[sender.dataset.id] = true;
 192       sender.classList.add('selected');
 193     }
 194
 195     var requestEventsNode = document.querySelector('#request-events');
 196     requestEventsNode.hidden = false;
 197
 198     requestEventsNode.model = [];
 199     for (var i = 0; i < this.model.length; i++) {
 200       if (this.model[i].id in this.selected)
 201         requestEventsNode.model.push(this.model[i]);
 202     }
 203   },
 204
 205   /**
 206    * Updates chart elements of active requests, so they grow with time.
 207    */
 208   activeUpdate: function() {
 209     if (Object.keys(this.active).length == 0)
 210       return;
 211
 212     for (var id in this.active) {
 213       var index = this.active[id];
 214       this.chart[index].length = Date.now() - this.chart[index].time;
 215     }
 216   },
 217
 218   /**
 219    * Generates <code>chart</code> from the new <code>model</code> value.
 220    */
 221   chartUpdate: function(oldLength, newLength) {
 222     // If the new value is empty, then clear the model.
 223     if (!newLength) {
 224       this.active = {};
 225       this.rows = [];
 226       this.chart = [];
 227       this.timeStart = null;
 228       this.idleStart = null;
 229       this.idleTotal = 0;
 230       this.selected = [];
 231       return;
 232     }
 233
 234     // Only adding new entries to the model is supported (or clearing).
 235     console.assert(newLength >= oldLength);
 236
 237     for (var i = oldLength; i < newLength; i++) {
 238       var event = this.model[i];
 239       switch (event.eventType) {
 240         case 'created':
 241           // If this is the first creation event in the chart, then store its
 242           // time as beginning time of the chart.
 243           if (!this.timeStart)
 244             this.timeStart = event.time;
 245
 246           // If this event terminates idling, then add the idling time to total
 247           // idling time. This is used to avoid gaps in the chart while idling.
 248           if (Object.keys(this.active).length == 0 && this.idleStart)
 249             this.idleTotal += event.time.getTime() - this.idleStart.getTime();
 250
 251           // Find the appropriate row for this chart element.
 252           var rowIndex = 0;
 253           while (true) {
 254             // Add to this row only if there is enough space, and if the row
 255             // is of the same type.
 256             var addToRow = (rowIndex >= this.rows.length) ||
 257                 (this.rows[rowIndex].time.getTime() <= event.time.getTime() &&
 258                  !this.rows[rowIndex].active &&
 259                  (this.rows[rowIndex].requestType == event.requestType));
 260
 261             if (addToRow) {
 262               this.chart.push({
 263                 index: this.chart.length,
 264                 id: event.id,
 265                 time: event.time,
 266                 executionTime: 0,
 267                 length: 0,
 268                 requestType: event.requestType,
 269                 left: event.time - this.timeStart - this.idleTotal,
 270                 row: rowIndex,
 271                 modelIndexes: [i]
 272               });
 273
 274               this.rows[rowIndex] = {
 275                 requestType: event.requestType,
 276                 time: event.time,
 277                 active: true
 278               };
 279
 280               this.active[event.id] = this.chart.length - 1;
 281               break;
 282             }
 283
 284             rowIndex++;
 285           }
 286           break;
 287
 288         case 'fulfilled':
 289         case 'rejected':
 290           if (!(event.id in this.active))
 291             return;
 292           var chartIndex = this.active[event.id];
 293           this.chart[chartIndex].state = event.eventType;
 294           this.chart[chartIndex].executionTime = event.executionTime;
 295           this.chart[chartIndex].valueSize = event.valueSize;
 296           this.chart[chartIndex].modelIndexes.push(i);
 297           break;
 298
 299         case 'destroyed':
 300           if (!(event.id in this.active))
 301             return;
 302
 303           var chartIndex = this.active[event.id];
 304           this.chart[chartIndex].length =
 305               event.time - this.chart[chartIndex].time;
 306           this.chart[chartIndex].modelIndexes.push(i);
 307           this.rows[this.chart[chartIndex].row].time = event.time;
 308           this.rows[this.chart[chartIndex].row].active = false;
 309           delete this.active[event.id];
 310
 311           // If this was the last active request, then idling starts.
 312           if (Object.keys(this.active).length == 0)
 313             this.idleStart = event.time;
 314           break;
 315       }
 316     }
 317   },
 318
 319   /**
 320    * Map of selected requests.
 321    * @type {Object.<number, boolean>}
 322    */
 323   selected: {},
 324
 325   /**
 326    * Map of requests which has started, but are not completed yet, from
 327    * a request id to the chart element index.
 328    * @type {Object.<number, number>}}
 329    */
 330   active: {},
 331
 332   /**
 333    * List of chart elements, calculated from the model.
 334    * @type {Array.<Object>}
 335    */
 336   chart: [],
 337
 338   /**
 339    * List of rows in the chart, with the last endTime value on it.
 340    * @type {Array.<Object>}
 341    */
 342   rows: [],
 343
 344   /**
 345    * Scale of the chart.
 346    * @type {number}
 347    */
 348   scale: 1,
 349
 350   /**
 351    * Time of the first created request.
 352    * @type {Date}
 353    */
 354   timeStart: null,
 355
 356   /**
 357    * Time of the last idling started.
 358    * @type {Date}
 359    */
 360   idleStart: null,
 361
 362   /**
 363    * Total idling time since chart generation started. Used to avoid
 364    * generating gaps in the chart when there is no activity. In milliseconds.
 365    * @type {number}
 366    */
 367   idleTotal: 0,
 368
 369   /**
 370    * List of requests information maps.
 371    * @type {Array.<Object>}
 372    */
 373   model: []
 374 });
 375
 376 /*
 377  * Updates the mounted file system list.
 378  * @param {Array.<Object>} fileSystems Array containing provided file system
 379  *     information.
 380  */
 381 function updateFileSystems(fileSystems) {
 382   var fileSystemsNode = document.querySelector('#file-systems');
 383   fileSystemsNode.model = fileSystems;
 384 }
 385
 386 /**
 387  * Called when a request is created.
 388  * @param {Object} event Event.
 389  */
 390 function onRequestEvent(event) {
 391   event.time = new Date(event.time);  // Convert to a real Date object.
 392   var requestTimelineNode = document.querySelector('#request-timeline');
 393   requestTimelineNode.model.push(event);
 394 }
 395
 396 document.addEventListener('DOMContentLoaded', function() {
 397   var context = document.getCSSCanvasContext('2d', 'dashedPattern', 4, 4);
 398   context.beginPath();
 399   context.strokeStyle = '#ffffff';
 400   context.moveTo(0, 0);
 401   context.lineTo(4, 4);
 402   context.stroke();
 403
 404   chrome.send('updateFileSystems');
 405
 406   // Refresh periodically.
 407   setInterval(function() {
 408     chrome.send('updateFileSystems');
 409   }, 1000);
 410 });