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Diffstat (limited to 'node_modules/react-dom/lib/TouchHistoryMath.js')
| -rw-r--r-- | node_modules/react-dom/lib/TouchHistoryMath.js | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/node_modules/react-dom/lib/TouchHistoryMath.js b/node_modules/react-dom/lib/TouchHistoryMath.js deleted file mode 100644 index 0755b0f9a..000000000 --- a/node_modules/react-dom/lib/TouchHistoryMath.js +++ /dev/null @@ -1,98 +0,0 @@ -/** - */ - -'use strict'; - -var 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) { - var touchBank = touchHistory.touchBank; - var total = 0; - var count = 0; - - var 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 (var i = 0; i < touchBank.length; i++) { - var touchTrack = touchBank[i]; - if (touchTrack !== null && touchTrack !== undefined && touchTrack.touchActive && touchTrack.currentTimeStamp >= touchesChangedAfter) { - var 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 -}; - -module.exports = TouchHistoryMath;
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