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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.
/**
* @fileoverview State and UI for trace data collection.
*/
cr.define('tracing', function() {
function TracingController() {
this.overlay_ = document.createElement('div');
this.overlay_.className = 'tracing-overlay';
cr.ui.decorate(this.overlay_, tracing.Overlay);
this.statusDiv_ = document.createElement('div');
this.overlay_.appendChild(this.statusDiv_);
this.bufferPercentDiv_ = document.createElement('div');
this.overlay_.appendChild(this.bufferPercentDiv_);
this.stopButton_ = document.createElement('button');
this.stopButton_.onclick = this.endTracing.bind(this);
this.stopButton_.textContent = 'Stop tracing';
this.overlay_.appendChild(this.stopButton_);
this.traceEvents_ = [];
if (browserBridge.debugMode) {
var tracingControllerTests = document.createElement('script');
tracingControllerTests.src =
'./tracing/tracing_controller_tests.js';
document.body.appendChild(tracingControllerTests);
}
this.onKeydownBoundToThis_ = this.onKeydown_.bind(this);
this.onKeypressBoundToThis_ = this.onKeypress_.bind(this);
chrome.send('tracingControllerInitialized');
}
TracingController.prototype = {
__proto__: cr.EventTarget.prototype,
gpuInfo_: undefined,
clientInfo_: undefined,
tracingEnabled_: false,
tracingEnding_: false,
onRequestBufferPercentFullComplete: function(percent_full) {
if (!this.overlay_.visible)
return;
window.setTimeout(this.beginRequestBufferPercentFull_.bind(this), 250);
this.bufferPercentDiv_.textContent = 'Buffer usage: ' +
Math.round(100 * percent_full) + '%';
},
/**
* Begin requesting the buffer fullness
*/
beginRequestBufferPercentFull_: function() {
chrome.send('beginRequestBufferPercentFull');
},
/**
* Called by info_view to empty the trace buffer
*/
beginTracing: function() {
if (this.tracingEnabled_)
throw Error('Tracing already begun.');
this.stopButton_.hidden = false;
this.statusDiv_.textContent = 'Tracing active.';
this.overlay_.visible = true;
this.tracingEnabled_ = true;
console.log('Beginning to trace...');
this.statusDiv_.textContent = 'Tracing active.';
this.traceEvents_ = [];
if (!browserBridge.debugMode) {
chrome.send('beginTracing');
this.beginRequestBufferPercentFull_();
} else {
tracing.tracingControllerTestHarness.beginTracing();
}
this.tracingEnabled_ = true;
var e = new cr.Event('traceBegun');
e.events = this.traceEvents_;
this.dispatchEvent(e);
e = new cr.Event('traceEventsChanged');
e.numEvents = this.traceEvents_.length;
this.dispatchEvent(e);
window.addEventListener('keypress', this.onKeypressBoundToThis_);
window.addEventListener('keydown', this.onKeydownBoundToThis_);
},
onKeydown_: function(e) {
if (e.keyCode == 27) {
this.endTracing();
}
},
onKeypress_: function(e) {
if (e.keyIdentifier == 'Enter') {
this.endTracing();
}
},
/**
* Called from gpu c++ code when ClientInfo is updated.
*/
onClientInfoUpdate: function(clientInfo) {
this.clientInfo_ = clientInfo;
},
/**
* Called from gpu c++ code when GPU Info is updated.
*/
onGpuInfoUpdate: function(gpuInfo) {
this.gpuInfo_ = gpuInfo;
},
/**
* Checks whether tracing is enabled
*/
get isTracingEnabled() {
return this.tracingEnabled_;
},
/**
* Gets the currently traced events. If tracing is active, then
* this can change on the fly.
*/
get traceEvents() {
return this.traceEvents_;
},
/**
* Called by tracing c++ code when new trace data arrives.
*/
onTraceDataCollected: function(events) {
this.statusDiv_.textContent = 'Processing trace...';
this.traceEvents_.push.apply(this.traceEvents_, events);
},
/**
* Called by info_view to finish tracing and update all views.
*/
endTracing: function() {
if (!this.tracingEnabled_) throw new Error('Tracing not begun.');
if (this.tracingEnding_) return;
this.tracingEnding_ = true;
this.statusDiv_.textContent = 'Ending trace...';
console.log('Finishing trace');
this.statusDiv_.textContent = 'Downloading trace data...';
this.stopButton_.hidden = true;
// delay sending endTracingAsync until we get a chance to
// update the screen...
window.setTimeout(function() {
if (!browserBridge.debugMode) {
chrome.send('endTracingAsync');
} else {
tracing.tracingControllerTestHarness.endTracing();
}
}, 100);
},
/**
* Called by the browser when all processes complete tracing.
*/
onEndTracingComplete: function() {
window.removeEventListener('keydown', this.onKeydownBoundToThis_);
window.removeEventListener('keypress', this.onKeypressBoundToThis_);
this.overlay_.visible = false;
this.tracingEnabled_ = false;
this.tracingEnding_ = false;
console.log('onEndTracingComplete p1 with ' +
this.traceEvents_.length + ' events.');
var e = new cr.Event('traceEnded');
e.events = this.traceEvents_;
this.dispatchEvent(e);
},
/**
* Tells browser to put up a load dialog and load the trace file
*/
beginLoadTraceFile: function() {
chrome.send('loadTraceFile');
},
/**
* Called by the browser when a trace file is loaded.
*/
onLoadTraceFileComplete: function(data) {
if (data.traceEvents) {
this.traceEvents_ = data.traceEvents;
} else { // path for loading traces saved without metadata
if (!data.length)
console.log('Expected an array when loading the trace file');
else
this.traceEvents_ = data;
}
var e = new cr.Event('loadTraceFileComplete');
e.events = this.traceEvents_;
this.dispatchEvent(e);
},
/**
* Called by the browser when loading a trace file was canceled.
*/
onLoadTraceFileCanceled: function() {
cr.dispatchSimpleEvent(this, 'loadTraceFileCanceled');
},
/**
* Tells browser to put up a save dialog and save the trace file
*/
beginSaveTraceFile: function(traceEvents) {
var data = {
traceEvents: traceEvents,
clientInfo: this.clientInfo_,
gpuInfo: this.gpuInfo_
};
chrome.send('saveTraceFile', [JSON.stringify(data)]);
},
/**
* Called by the browser when a trace file is saveed.
*/
onSaveTraceFileComplete: function() {
cr.dispatchSimpleEvent(this, 'saveTraceFileComplete');
},
/**
* Called by the browser when saving a trace file was canceled.
*/
onSaveTraceFileCanceled: function() {
cr.dispatchSimpleEvent(this, 'saveTraceFileCanceled');
},
selfTest: function() {
this.beginTracing();
window.setTimeout(this.endTracing.bind(This), 500);
}
};
return {
TracingController: TracingController
};
});
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