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<!DOCTYPE html>
<!--
Copyright (c) 2013 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.
-->
<link rel="import" href="/tracing/ui/extras/about_tracing/record_selection_dialog.html">
<script>
'use strict';
tr.exportTo('tr.ui.e.about_tracing', function() {
function beginRecording(tracingControllerClient) {
var finalPromiseResolver;
var finalPromise = new Promise(function(resolve, reject) {
finalPromiseResolver = {
resolve: resolve,
reject: reject
};
});
finalPromise.selectionDlg = undefined;
finalPromise.progressDlg = undefined;
function beginRecordingError(err) {
finalPromiseResolver.reject(err);
}
// Step 0: End recording. This is necessary when the user reloads the
// about:tracing page when we are recording. Window.onbeforeunload is not
// reliable to end recording on reload.
endRecording(tracingControllerClient).then(
getCategories,
getCategories); // Ignore error.
// But just in case, bind onbeforeunload anyway.
window.onbeforeunload = function(e) {
endRecording(tracingControllerClient);
};
// Step 1: Get categories.
function getCategories() {
var p = tracingControllerClient.getCategories().then(
showTracingDialog,
beginRecordingError);
p.catch(function(err) {
beginRecordingError(err);
});
}
// Step 2: Show tracing dialog.
var selectionDlg;
function showTracingDialog(categories) {
selectionDlg = new tr.ui.e.about_tracing.RecordSelectionDialog();
selectionDlg.categories = categories;
selectionDlg.settings_key =
'tr.ui.e.about_tracing.record_selection_dialog';
selectionDlg.addEventListener('recordclick', startTracing);
selectionDlg.addEventListener('closeclick', cancelRecording);
selectionDlg.visible = true;
finalPromise.selectionDlg = selectionDlg;
}
function cancelRecording() {
finalPromise.selectionDlg = undefined;
finalPromiseResolver.reject(new UserCancelledError());
}
// Step 2: Do the actual tracing dialog.
var progressDlg;
var bufferPercentFullDiv;
function startTracing() {
progressDlg = new tr.ui.b.Overlay();
Polymer.dom(progressDlg).textContent = 'Recording...';
progressDlg.userCanClose = false;
bufferPercentFullDiv = document.createElement('div');
Polymer.dom(progressDlg).appendChild(bufferPercentFullDiv);
var stopButton = document.createElement('button');
Polymer.dom(stopButton).textContent = 'Stop';
progressDlg.clickStopButton = function() {
stopButton.click();
};
Polymer.dom(progressDlg).appendChild(stopButton);
var recordingOptions = {
categoryFilter: selectionDlg.categoryFilter(),
useSystemTracing: selectionDlg.useSystemTracing,
tracingRecordMode: selectionDlg.tracingRecordMode,
useSampling: selectionDlg.useSampling
};
var requestPromise = tracingControllerClient.beginRecording(
recordingOptions);
requestPromise.then(
function() {
progressDlg.visible = true;
stopButton.focus();
updateBufferPercentFull('0');
},
recordFailed);
stopButton.addEventListener('click', function() {
// TODO(chrishenry): Currently, this only dismiss the progress
// dialog when tracingComplete event is received. When performing
// remote debugging, the tracingComplete event may be delayed
// considerable. We should indicate to user that we are waiting
// for tracingComplete event instead of being unresponsive. (For
// now, I disable the "stop" button, since clicking on the button
// again now cause exception.)
var recordingPromise = endRecording(tracingControllerClient);
recordingPromise.then(
recordFinished,
recordFailed);
stopButton.disabled = true;
bufferPercentFullDiv = undefined;
});
finalPromise.progressDlg = progressDlg;
}
function recordFinished(tracedData) {
progressDlg.visible = false;
finalPromise.progressDlg = undefined;
finalPromiseResolver.resolve(tracedData);
}
function recordFailed(err) {
progressDlg.visible = false;
finalPromise.progressDlg = undefined;
finalPromiseResolver.reject(err);
}
function getBufferPercentFull() {
if (!bufferPercentFullDiv)
return;
tracingControllerClient.beginGetBufferPercentFull().then(
updateBufferPercentFull);
}
function updateBufferPercentFull(percentFull) {
if (!bufferPercentFullDiv)
return;
percentFull = Math.round(100 * parseFloat(percentFull));
var newText = 'Buffer usage: ' + percentFull + '%';
if (Polymer.dom(bufferPercentFullDiv).textContent !== newText)
Polymer.dom(bufferPercentFullDiv).textContent = newText;
window.setTimeout(getBufferPercentFull, 500);
}
// Thats it! We're done.
return finalPromise;
}
function endRecording(tracingControllerClient) {
return tracingControllerClient.endRecording();
}
function defaultTraceName(tracingControllerClient) {
return tracingControllerClient.defaultTraceName();
}
function UserCancelledError() {
Error.apply(this, arguments);
}
UserCancelledError.prototype = {
__proto__: Error.prototype
};
return {
beginRecording: beginRecording,
UserCancelledError: UserCancelledError,
defaultTraceName: defaultTraceName
};
});
</script>
|
