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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('gpu', function() {
function TracingController() {
this.startButton_ = document.createElement('div');
this.startButton_.className = 'gpu-tracing-start-button';
this.startButton_.textContent = 'Start tracing';
this.startButton_.onclick = this.beginTracing.bind(this);
document.body.appendChild(this.startButton_);
this.overlay_ = document.createElement('div');
this.overlay_.className = 'gpu-tracing-overlay';
cr.ui.decorate(this.overlay_, gpu.Overlay);
var statusDiv = document.createElement('div');
statusDiv.textContent = 'Tracing active.';
this.overlay_.appendChild(statusDiv);
var stopButton = document.createElement('button');
stopButton.onclick = this.endTracing.bind(this);
stopButton.innerText = 'Stop tracing';
this.overlay_.appendChild(stopButton);
this.traceEvents_ = [];
if (browserBridge.debugMode) {
var tracingControllerTests = document.createElement('script');
tracingControllerTests.src =
'./gpu_internals/tracing_controller_tests.js';
document.body.appendChild(tracingControllerTests);
}
this.onKeydownBoundToThis_ = this.onKeydown_.bind(this);
this.onKeypressBoundToThis_ = this.onKeypress_.bind(this);
}
TracingController.prototype = {
__proto__: cr.EventTarget.prototype,
tracingEnabled_: false,
/**
* Called by info_view to empty the trace buffer
*/
beginTracing: function() {
if (this.tracingEnabled_)
throw Error('Tracing already begun.');
this.overlay_.visible = true;
this.tracingEnabled_ = true;
console.log('Beginning to trace...');
this.traceEvents_ = [];
if (!browserBridge.debugMode)
chrome.send('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_);
// In debug mode, stop tracing automatically
if (browserBridge.debugMode)
window.setTimeout(this.endTracing.bind(this), 100);
},
onKeydown_: function(e) {
if (e.keyCode == 27) {
this.endTracing();
}
},
onKeypress_: function(e) {
if (e.keyIdentifier == 'Enter') {
this.endTracing();
}
},
/**
* 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_;
},
/**
* Callbed by gpu c++ code when new GPU trace data arrives.
*/
onTraceDataCollected: function(events) {
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.');
window.removeEventListener('keydown', this.onKeydownBoundToThis_);
window.removeEventListener('keypress', this.onKeypressBoundToThis_);
console.log('Finishing trace');
if (!browserBridge.debugMode) {
chrome.send('endTracingAsync');
} else {
var events = tracingControllerTestEvents;
this.onTraceDataCollected(events);
window.setTimeout(this.onEndTracingComplete.bind(this), 250);
}
},
/**
* Called by the browser when all processes complete tracing.
*/
onEndTracingComplete: function() {
this.overlay_.visible = false;
this.tracingEnabled_ = false;
console.log('onEndTracingComplete p1 with ' +
this.traceEvents_.length + ' events.');
var e = new cr.Event('traceEnded');
e.events = this.traceEvents_;
this.dispatchEvent(e);
},
selfTest: function() {
this.beginTracing();
window.setTimeout(this.endTracing.bind(This), 500);
}
};
return {
TracingController: TracingController
};
});
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