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/**
* The examples provided by Facebook are for non-commercial testing and
* evaluation purposes only.
*
* Facebook reserves all rights not expressly granted.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @flow
*/
'use strict';
var React = require('react');
var ReactNative = require('react-native');
var {
AlertIOS,
Platform,
ToastAndroid,
View,
} = ReactNative;
var TimerMixin = require('react-timer-mixin');
var UIExplorerButton = require('./UIExplorerButton');
var TimerTester = React.createClass({
mixins: [TimerMixin],
_ii: 0,
_iters: 0,
_start: 0,
_timerFn: (null : ?(() => any)),
_handle: (null : any),
render: function() {
var args = 'fn' + (this.props.dt !== undefined ? ', ' + this.props.dt : '');
return (
<UIExplorerButton onPress={this._run}>
Measure: {this.props.type}({args}) - {this._ii || 0}
</UIExplorerButton>
);
},
_run: function() {
if (!this._start) {
var d = new Date();
this._start = d.getTime();
this._iters = 100;
this._ii = 0;
if (this.props.type === 'setTimeout') {
if (this.props.dt < 1) {
this._iters = 5000;
} else if (this.props.dt > 20) {
this._iters = 10;
}
this._timerFn = () => this.setTimeout(this._run, this.props.dt);
} else if (this.props.type === 'requestAnimationFrame') {
this._timerFn = () => this.requestAnimationFrame(this._run);
} else if (this.props.type === 'setImmediate') {
this._iters = 5000;
this._timerFn = () => this.setImmediate(this._run);
} else if (this.props.type === 'setInterval') {
this._iters = 30; // Only used for forceUpdate periodicidy
this._timerFn = null;
this._handle = this.setInterval(this._run, this.props.dt);
}
}
if (this._ii >= this._iters && !this._handle) {
var d = new Date();
var e = (d.getTime() - this._start);
var msg = 'Finished ' + this._ii + ' ' + this.props.type + ' calls.\n' +
'Elapsed time: ' + e + ' ms\n' + (e / this._ii) + ' ms / iter';
console.log(msg);
if (Platform.OS === 'ios') {
AlertIOS.alert(msg);
} else if (Platform.OS === 'android') {
ToastAndroid.show(msg, ToastAndroid.SHORT);
}
this._start = 0;
this.forceUpdate(() => { this._ii = 0; });
return;
}
this._ii++;
// Only re-render occasionally so we don't slow down timers.
if (this._ii % (this._iters / 5) === 0) {
this.forceUpdate();
}
this._timerFn && this._timerFn();
},
clear: function() {
this.clearInterval(this._handle); // invalid handles are ignored
if (this._handle) {
// Configure things so we can do a final run to update UI and reset state.
this._handle = null;
this._iters = this._ii;
this._run();
}
},
});
exports.framework = 'React';
exports.title = 'Timers, TimerMixin';
exports.description = 'The TimerMixin provides timer functions for executing ' +
'code in the future that are safely cleaned up when the component unmounts.';
exports.examples = [
{
title: 'this.setTimeout(fn, t)',
description: 'Execute function fn t milliseconds in the future. If ' +
't === 0, it will be enqueued immediately in the next event loop. ' +
'Larger values will fire on the closest frame.',
render: function() {
return (
<View>
<TimerTester type="setTimeout" dt={0} />
<TimerTester type="setTimeout" dt={1} />
<TimerTester type="setTimeout" dt={100} />
</View>
);
},
},
{
title: 'this.requestAnimationFrame(fn)',
description: 'Execute function fn on the next frame.',
render: function() {
return (
<View>
<TimerTester type="requestAnimationFrame" />
</View>
);
},
},
{
title: 'this.setImmediate(fn)',
description: 'Execute function fn at the end of the current JS event loop.',
render: function() {
return (
<View>
<TimerTester type="setImmediate" />
</View>
);
},
},
{
title: 'this.setInterval(fn, t)',
description: 'Execute function fn every t milliseconds until cancelled ' +
'or component is unmounted.',
render: function(): ReactElement<any> {
var IntervalExample = React.createClass({
getInitialState: function() {
return {
showTimer: true,
};
},
render: function() {
if (this.state.showTimer) {
var timer = [
<TimerTester ref="interval" dt={25} type="setInterval" />,
<UIExplorerButton onPress={() => this.refs.interval.clear() }>
Clear interval
</UIExplorerButton>
];
var toggleText = 'Unmount timer';
} else {
var timer = null;
var toggleText = 'Mount new timer';
}
return (
<View>
{this.state.showTimer && this._renderTimer()}
<UIExplorerButton onPress={this._toggleTimer}>
{this.state.showTimer ? 'Unmount timer' : 'Mount new timer'}
</UIExplorerButton>
</View>
);
},
_renderTimer: function() {
return (
<View>
<TimerTester ref="interval" dt={25} type="setInterval" />
<UIExplorerButton onPress={() => this.refs.interval.clear() }>
Clear interval
</UIExplorerButton>
</View>
);
},
_toggleTimer: function() {
this.setState({showTimer: !this.state.showTimer});
},
});
return <IntervalExample />;
},
},
];