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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('media', function() {
'use strict';
/**
* This class inherits from <li> and is designed to store and display
* information about an open media player.
*/
var MediaPlayer = cr.ui.define('li');
MediaPlayer.prototype = {
__proto__: HTMLLIElement.prototype,
renderer: null,
id: null,
/**
* Decorate this <li> as a MediaPlayer.
*/
decorate: function() {
this.properties = {};
this.details_ = document.createElement('details');
this.summary_ = document.createElement('summary');
this.details_.appendChild(this.summary_);
this.propertyTable_ = document.createElement('table');
this.events_ = new media.EventList;
this.metrics_ = new media.Metrics;
var properties = media.createDetailsLi();
properties.summary.textContent = 'Properties:';
properties.details.appendChild(this.propertyTable_);
var ul = document.createElement('ul');
ul.appendChild(properties);
ul.appendChild(this.metrics_);
ul.appendChild(this.events_);
this.details_.appendChild(ul);
this.appendChild(this.details_);
document.getElementById('media-players').appendChild(this);
},
/**
* Record an event and update statistics etc.
* @param {Object} event The event that occurred.
*/
addEvent: function(event) {
for (var key in event.params) {
this.properties[key] = event.params[key];
}
if (event.type == 'BUFFERED_EXTENTS_CHANGED')
return;
this.events_.addEvent(event);
this.metrics_.addEvent(event);
},
/**
* Update the summary line and properties table and redraw the canvas.
* @return {HTMLElement} A <li> representing this MediaPlayer.
*/
redraw: function() {
media.appendDictionaryToTable(this.properties, this.propertyTable_);
this.setAttribute('status', this.properties.state);
this.summary_.textContent = '';
this.summary_.appendChild(document.createTextNode(
this.id + ' (' + this.properties.url + '):'));
this.summary_.appendChild(document.createElement('br'));
// Don't bother drawing anything if we don't know the total size.
var size = this.properties.total_bytes;
if (!size) {
return;
}
var bufferedDiv = document.createElement('div');
bufferedDiv.className = 'buffered';
this.summary_.appendChild(bufferedDiv);
function addEntry(label, canvas) {
var labelDiv = document.createElement('div');
labelDiv.textContent = label;
var canvasDiv = document.createElement('div');
canvasDiv.appendChild(canvas);
var entryDiv = document.createElement('div');
entryDiv.appendChild(labelDiv);
entryDiv.appendChild(canvasDiv);
bufferedDiv.appendChild(entryDiv);
}
// Draw the state of BufferedResourceLoader.
var canvas = document.createElement('canvas');
canvas.width = media.BAR_WIDTH;
canvas.height = media.BAR_HEIGHT;
var context = canvas.getContext('2d');
context.fillStyle = '#aaa';
context.fillRect(0, 0, canvas.width, canvas.height);
var left = this.properties.buffer_start / size * canvas.width;
var middle = this.properties.buffer_current / size * canvas.width;
var right = this.properties.buffer_end / size * canvas.width;
context.fillStyle = '#a0a';
context.fillRect(left, 0, middle - left, canvas.height);
context.fillStyle = '#aa0';
context.fillRect(middle, 0, right - middle, canvas.height);
addEntry('Buffered', canvas);
// Only show cached file information if we have something.
var cacheEntry = media.cacheEntriesByKey[this.properties.url];
if (!cacheEntry) {
return;
}
// Draw cache reads.
canvas = document.createElement('canvas');
canvas.width = media.BAR_WIDTH;
canvas.height = media.BAR_HEIGHT;
cacheEntry.drawCacheReadsToCanvas(canvas);
addEntry('Cache Reads', canvas);
// Draw cache writes.
canvas = document.createElement('canvas');
canvas.width = media.BAR_WIDTH;
canvas.height = media.BAR_HEIGHT;
cacheEntry.drawCacheWritesToCanvas(canvas);
addEntry('Cache Writes', canvas);
},
};
return {
MediaPlayer: MediaPlayer
};
});
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