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Move TouchHistoryMath to React Native repo (#12557) 

This isn't used by React core and is just a pure helper so it might as
well live where it's used. The React Native repo.
This commit is contained in:
Sebastian Markbåge 2018-04-05 20:29:04 -07:00 committed by GitHub
parent 7a3416f275
commit cf649b40a5
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151
packages/events/TouchHistoryMath.js
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@ -1,151 +0,0 @@
/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
const TouchHistoryMath = {
/**
* This code is optimized and not intended to look beautiful. This allows
* computing of touch centroids that have moved after `touchesChangedAfter`
* timeStamp. You can compute the current centroid involving all touches
* moves after `touchesChangedAfter`, or you can compute the previous
* centroid of all touches that were moved after `touchesChangedAfter`.
*
* @param {TouchHistoryMath} touchHistory Standard Responder touch track
* data.
* @param {number} touchesChangedAfter timeStamp after which moved touches
* are considered "actively moving" - not just "active".
* @param {boolean} isXAxis Consider `x` dimension vs. `y` dimension.
* @param {boolean} ofCurrent Compute current centroid for actively moving
* touches vs. previous centroid of now actively moving touches.
* @return {number} value of centroid in specified dimension.
*/
centroidDimension: function(
touchHistory,
touchesChangedAfter,
isXAxis,
ofCurrent,
) {
const touchBank = touchHistory.touchBank;
let total = 0;
let count = 0;
const oneTouchData =
touchHistory.numberActiveTouches === 1
? touchHistory.touchBank[touchHistory.indexOfSingleActiveTouch]
: null;
if (oneTouchData !== null) {
if (
oneTouchData.touchActive &&
oneTouchData.currentTimeStamp > touchesChangedAfter
) {
total +=
ofCurrent && isXAxis
? oneTouchData.currentPageX
: ofCurrent && !isXAxis
? oneTouchData.currentPageY
: !ofCurrent && isXAxis
? oneTouchData.previousPageX
: oneTouchData.previousPageY;
count = 1;
}
} else {
for (let i = 0; i < touchBank.length; i++) {
const touchTrack = touchBank[i];
if (
touchTrack !== null &&
touchTrack !== undefined &&
touchTrack.touchActive &&
touchTrack.currentTimeStamp >= touchesChangedAfter
) {
let toAdd; // Yuck, program temporarily in invalid state.
if (ofCurrent && isXAxis) {
toAdd = touchTrack.currentPageX;
} else if (ofCurrent && !isXAxis) {
toAdd = touchTrack.currentPageY;
} else if (!ofCurrent && isXAxis) {
toAdd = touchTrack.previousPageX;
} else {
toAdd = touchTrack.previousPageY;
}
total += toAdd;
count++;
}
}
}
return count > 0 ? total / count : TouchHistoryMath.noCentroid;
},
currentCentroidXOfTouchesChangedAfter: function(
touchHistory,
touchesChangedAfter,
) {
return TouchHistoryMath.centroidDimension(
touchHistory,
touchesChangedAfter,
true, // isXAxis
true, // ofCurrent
);
},
currentCentroidYOfTouchesChangedAfter: function(
touchHistory,
touchesChangedAfter,
) {
return TouchHistoryMath.centroidDimension(
touchHistory,
touchesChangedAfter,
false, // isXAxis
true, // ofCurrent
);
},
previousCentroidXOfTouchesChangedAfter: function(
touchHistory,
touchesChangedAfter,
) {
return TouchHistoryMath.centroidDimension(
touchHistory,
touchesChangedAfter,
true, // isXAxis
false, // ofCurrent
);
},
previousCentroidYOfTouchesChangedAfter: function(
touchHistory,
touchesChangedAfter,
) {
return TouchHistoryMath.centroidDimension(
touchHistory,
touchesChangedAfter,
false, // isXAxis
false, // ofCurrent
);
},
currentCentroidX: function(touchHistory) {
return TouchHistoryMath.centroidDimension(
touchHistory,
0, // touchesChangedAfter
true, // isXAxis
true, // ofCurrent
);
},
currentCentroidY: function(touchHistory) {
return TouchHistoryMath.centroidDimension(
touchHistory,
0, // touchesChangedAfter
false, // isXAxis
true, // ofCurrent
);
},
noCentroid: -1,
};
export default TouchHistoryMath;

2
packages/react-native-renderer/src/ReactFabric.js vendored
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@ -14,7 +14,6 @@ import './ReactFabricInjection';
import * as ReactPortal from 'shared/ReactPortal';
import * as ReactGenericBatching from 'events/ReactGenericBatching';
import TouchHistoryMath from 'events/TouchHistoryMath';
import ReactVersion from 'shared/ReactVersion';
import NativeMethodsMixin from './NativeMethodsMixin';
@ -87,7 +86,6 @@ const ReactFabric: ReactNativeType = {
ReactNativeBridgeEventPlugin, // requireNativeComponent
ReactNativeComponentTree, // ScrollResponder
ReactNativePropRegistry, // flattenStyle, Stylesheet
TouchHistoryMath, // PanResponder
createReactNativeComponentClass, // RCTText, RCTView, ReactNativeART
takeSnapshot, // react-native-implementation
},

2
packages/react-native-renderer/src/ReactNativeRenderer.js vendored
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@ -14,7 +14,6 @@ import './ReactNativeInjection';
import * as ReactPortal from 'shared/ReactPortal';
import * as ReactGenericBatching from 'events/ReactGenericBatching';
import TouchHistoryMath from 'events/TouchHistoryMath';
import ReactVersion from 'shared/ReactVersion';
// Module provided by RN:
import UIManager from 'UIManager';
@ -106,7 +105,6 @@ const ReactNativeRenderer: ReactNativeType = {
ReactNativeBridgeEventPlugin, // requireNativeComponent
ReactNativeComponentTree, // ScrollResponder
ReactNativePropRegistry, // flattenStyle, Stylesheet
TouchHistoryMath, // PanResponder
createReactNativeComponentClass, // RCTText, RCTView, ReactNativeART
takeSnapshot, // react-native-implementation
computeComponentStackForErrorReporting,

17
scripts/rollup/shims/react-native/TouchHistoryMath.js vendored
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@ -1,17 +0,0 @@
/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @providesModule TouchHistoryMath
*/
'use strict';
const {
__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED,
} = require('ReactNative');
module.exports =
__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.TouchHistoryMath;