content/browser/resources/media/client_renderer.js

   1 // Copyright 2013 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 var ClientRenderer = (function() {
   6   var ClientRenderer = function() {
   7     this.playerListElement = document.getElementById('player-list');
   8     this.propertiesTable =
   9         document.getElementById('property-table').querySelector('tbody');
  10     this.logTable = document.getElementById('log').querySelector('tbody');
  11     this.graphElement = document.getElementById('graphs');
  12     this.propertyName = document.getElementById('property-name');
  13
  14     this.selectedPlayer = null;
  15     this.selectedAudioComponentType = null;
  16     this.selectedAudioComponentId = null;
  17     this.selectedAudioCompontentData = null;
  18
  19     this.selectedPlayerLogIndex = 0;
  20
  21     this.filterFunction = function() { return true; };
  22     this.filterText = document.getElementById('filter-text');
  23     this.filterText.onkeyup = this.onTextChange_.bind(this);
  24
  25     this.bufferCanvas = document.createElement('canvas');
  26     this.bufferCanvas.width = media.BAR_WIDTH;
  27     this.bufferCanvas.height = media.BAR_HEIGHT;
  28
  29     this.clipboardTextarea = document.getElementById('clipboard-textarea');
  30     this.clipboardButton = document.getElementById('copy-button');
  31     this.clipboardButton.onclick = this.copyToClipboard_.bind(this);
  32
  33     this.hiddenKeys = ['component_id', 'component_type', 'owner_id'];
  34   };
  35
  36   function removeChildren(element) {
  37     while (element.hasChildNodes()) {
  38       element.removeChild(element.lastChild);
  39     }
  40   };
  41
  42   function createButton(text, select_cb) {
  43     var button = document.createElement('button');
  44
  45     button.appendChild(document.createTextNode(text));
  46     button.onclick = function() {
  47       select_cb();
  48     };
  49
  50     return button;
  51   };
  52
  53   ClientRenderer.prototype = {
  54     /**
  55      * Called when an audio component is added to the collection.
  56      * @param componentType Integer AudioComponent enum value; must match values
  57      * from the AudioLogFactory::AudioComponent enum.
  58      * @param components The entire map of components (name -> dict).
  59      */
  60     audioComponentAdded: function(componentType, components) {
  61       this.redrawAudioComponentList_(componentType, components);
  62
  63       // Redraw the component if it's currently selected.
  64       if (this.selectedAudioComponentType == componentType &&
  65           this.selectedAudioComponentId &&
  66           this.selectedAudioComponentId in components) {
  67         this.selectAudioComponent_(
  68             componentType, this.selectedAudioComponentId,
  69             components[this.selectedAudioComponentId]);
  70       }
  71     },
  72
  73     /**
  74      * Called when an audio component is removed from the collection.
  75      * @param componentType Integer AudioComponent enum value; must match values
  76      * from the AudioLogFactory::AudioComponent enum.
  77      * @param components The entire map of components (name -> dict).
  78      */
  79     audioComponentRemoved: function(componentType, components) {
  80       this.redrawAudioComponentList_(componentType, components);
  81
  82       // Clear the component if it was previously currently selected.
  83       if (this.selectedAudioComponentType == componentType &&
  84           !(this.selectedAudioComponentId in components)) {
  85         this.selectAudioComponent_(null, null, {});
  86       }
  87     },
  88
  89     /**
  90      * Called when a player is added to the collection.
  91      * @param players The entire map of id -> player.
  92      * @param player_added The player that is added.
  93      */
  94     playerAdded: function(players, playerAdded) {
  95       this.redrawPlayerList_(players);
  96     },
  97
  98     /**
  99      * Called when a playre is removed from the collection.
 100      * @param players The entire map of id -> player.
 101      * @param player_added The player that was removed.
 102      */
 103     playerRemoved: function(players, playerRemoved) {
 104       this.redrawPlayerList_(players);
 105     },
 106
 107     /**
 108      * Called when a property on a player is changed.
 109      * @param players The entire map of id -> player.
 110      * @param player The player that had its property changed.
 111      * @param key The name of the property that was changed.
 112      * @param value The new value of the property.
 113      */
 114     playerUpdated: function(players, player, key, value) {
 115       if (player === this.selectedPlayer) {
 116         this.drawProperties_(player.properties);
 117         this.drawLog_();
 118         this.drawGraphs_();
 119       }
 120       if (key === 'name' || key === 'url') {
 121         this.redrawPlayerList_(players);
 122       }
 123     },
 124
 125     redrawAudioComponentList_: function(componentType, components) {
 126       function redrawList(renderer, baseName, element) {
 127         var fragment = document.createDocumentFragment();
 128         for (id in components) {
 129           var li = document.createElement('li');
 130           var friendlyName = baseName + ' ' + id;
 131           li.appendChild(createButton(
 132               friendlyName, renderer.selectAudioComponent_.bind(
 133                   renderer, componentType, id, components[id], friendlyName)));
 134           fragment.appendChild(li);
 135         }
 136         removeChildren(element);
 137         element.appendChild(fragment);
 138       }
 139
 140       switch (componentType) {
 141         case 0:
 142           redrawList(this, 'Controller', document.getElementById(
 143               'audio-input-controller-list'));
 144           break;
 145         case 1:
 146           redrawList(this, 'Controller', document.getElementById(
 147               'audio-output-controller-list'));
 148           break;
 149         case 2:
 150           redrawList(this, 'Stream', document.getElementById(
 151               'audio-output-stream-list'));
 152           break;
 153         default:
 154           break;
 155       }
 156     },
 157
 158     selectAudioComponent_: function(
 159           componentType, componentId, componentData, friendlyName) {
 160       this.selectedPlayer = null;
 161       this.selectedAudioComponentType = componentType;
 162       this.selectedAudioComponentId = componentId;
 163       this.selectedAudioCompontentData = componentData;
 164       this.drawProperties_(componentData);
 165       removeChildren(this.logTable);
 166       removeChildren(this.graphElement);
 167
 168       removeChildren(this.propertyName);
 169       this.propertyName.appendChild(document.createTextNode(friendlyName));
 170     },
 171
 172     redrawPlayerList_: function(players) {
 173       var fragment = document.createDocumentFragment();
 174       for (id in players) {
 175         var player = players[id];
 176         var usableName = player.properties.name ||
 177             player.properties.url ||
 178             'Player ' + player.id;
 179
 180         var li = document.createElement('li');
 181         li.appendChild(createButton(
 182             usableName, this.selectPlayer_.bind(this, player)));
 183         fragment.appendChild(li);
 184       }
 185       removeChildren(this.playerListElement);
 186       this.playerListElement.appendChild(fragment);
 187     },
 188
 189     selectPlayer_: function(player) {
 190       this.selectedPlayer = player;
 191       this.selectedPlayerLogIndex = 0;
 192       this.selectedAudioComponentType = null;
 193       this.selectedAudioComponentId = null;
 194       this.selectedAudioCompontentData = null;
 195       this.drawProperties_(player.properties);
 196
 197       removeChildren(this.logTable);
 198       removeChildren(this.graphElement);
 199       this.drawLog_();
 200       this.drawGraphs_();
 201       removeChildren(this.propertyName);
 202       this.propertyName.appendChild(document.createTextNode('Player'));
 203     },
 204
 205     drawProperties_: function(propertyMap) {
 206       removeChildren(this.propertiesTable);
 207       var sortedKeys = Object.keys(propertyMap).sort();
 208       for (var i = 0; i < sortedKeys.length; ++i) {
 209         var key = sortedKeys[i];
 210         if (this.hiddenKeys.indexOf(key) >= 0)
 211           continue;
 212
 213         var value = propertyMap[key];
 214         var row = this.propertiesTable.insertRow(-1);
 215         var keyCell = row.insertCell(-1);
 216         var valueCell = row.insertCell(-1);
 217
 218         keyCell.appendChild(document.createTextNode(key));
 219         valueCell.appendChild(document.createTextNode(value));
 220       }
 221     },
 222
 223     appendEventToLog_: function(event) {
 224       if (this.filterFunction(event.key)) {
 225         var row = this.logTable.insertRow(-1);
 226
 227         var timestampCell = row.insertCell(-1);
 228         timestampCell.classList.add('timestamp');
 229         timestampCell.appendChild(document.createTextNode(
 230             util.millisecondsToString(event.time)));
 231         row.insertCell(-1).appendChild(document.createTextNode(event.key));
 232         row.insertCell(-1).appendChild(document.createTextNode(event.value));
 233       }
 234     },
 235
 236     drawLog_: function() {
 237       var toDraw = this.selectedPlayer.allEvents.slice(
 238           this.selectedPlayerLogIndex);
 239       toDraw.forEach(this.appendEventToLog_.bind(this));
 240       this.selectedPlayerLogIndex = this.selectedPlayer.allEvents.length;
 241     },
 242
 243     drawGraphs_: function() {
 244       function addToGraphs(name, graph, graphElement) {
 245         var li = document.createElement('li');
 246         li.appendChild(graph);
 247         li.appendChild(document.createTextNode(name));
 248         graphElement.appendChild(li);
 249       }
 250
 251       var url = this.selectedPlayer.properties.url;
 252       if (!url) {
 253         return;
 254       }
 255
 256       var cache = media.cacheForUrl(url);
 257
 258       var player = this.selectedPlayer;
 259       var props = player.properties;
 260
 261       var cacheExists = false;
 262       var bufferExists = false;
 263
 264       if (props['buffer_start'] !== undefined &&
 265           props['buffer_current'] !== undefined &&
 266           props['buffer_end'] !== undefined &&
 267           props['total_bytes'] !== undefined) {
 268         this.drawBufferGraph_(props['buffer_start'],
 269                               props['buffer_current'],
 270                               props['buffer_end'],
 271                               props['total_bytes']);
 272         bufferExists = true;
 273       }
 274
 275       if (cache) {
 276         if (player.properties['total_bytes']) {
 277           cache.size = Number(player.properties['total_bytes']);
 278         }
 279         cache.generateDetails();
 280         cacheExists = true;
 281
 282       }
 283
 284       if (!this.graphElement.hasChildNodes()) {
 285         if (bufferExists) {
 286           addToGraphs('buffer', this.bufferCanvas, this.graphElement);
 287         }
 288         if (cacheExists) {
 289           addToGraphs('cache read', cache.readCanvas, this.graphElement);
 290           addToGraphs('cache write', cache.writeCanvas, this.graphElement);
 291         }
 292       }
 293     },
 294
 295     drawBufferGraph_: function(start, current, end, size) {
 296       var ctx = this.bufferCanvas.getContext('2d');
 297       var width = this.bufferCanvas.width;
 298       var height = this.bufferCanvas.height;
 299       ctx.fillStyle = '#aaa';
 300       ctx.fillRect(0, 0, width, height);
 301
 302       var scale_factor = width / size;
 303       var left = start * scale_factor;
 304       var middle = current * scale_factor;
 305       var right = end * scale_factor;
 306
 307       ctx.fillStyle = '#a0a';
 308       ctx.fillRect(left, 0, middle - left, height);
 309       ctx.fillStyle = '#aa0';
 310       ctx.fillRect(middle, 0, right - middle, height);
 311     },
 312
 313     copyToClipboard_: function() {
 314       var properties = this.selectedAudioCompontentData ||
 315           this.selectedPlayer.properties || false;
 316       if (!properties) {
 317         return;
 318       }
 319       var stringBuffer = [];
 320
 321       for (var key in properties) {
 322         var value = properties[key];
 323         stringBuffer.push(key.toString());
 324         stringBuffer.push(': ');
 325         stringBuffer.push(value.toString());
 326         stringBuffer.push('\n');
 327       }
 328
 329       this.clipboardTextarea.value = stringBuffer.join('');
 330       this.clipboardTextarea.classList.remove('hiddenClipboard');
 331       this.clipboardTextarea.focus();
 332       this.clipboardTextarea.select();
 333
 334       // Hide the clipboard element when it loses focus.
 335       this.clipboardTextarea.onblur = function(event) {
 336         setTimeout(function(element) {
 337           event.target.classList.add('hiddenClipboard');
 338         }, 0);
 339       };
 340     },
 341
 342     onTextChange_: function(event) {
 343       var text = this.filterText.value.toLowerCase();
 344       var parts = text.split(',').map(function(part) {
 345         return part.trim();
 346       }).filter(function(part) {
 347         return part.trim().length > 0;
 348       });
 349
 350       this.filterFunction = function(text) {
 351         text = text.toLowerCase();
 352         return parts.length === 0 || parts.some(function(part) {
 353           return text.indexOf(part) != -1;
 354         });
 355       };
 356
 357       if (this.selectedPlayer) {
 358         removeChildren(this.logTable);
 359         this.selectedPlayerLogIndex = 0;
 360         this.drawLog_();
 361       }
 362     },
 363   };
 364
 365   return ClientRenderer;
 366 })();