react-native-page-flipper/lib/module/utils/utils.js

Page Flipper

import { runOnJS } from 'react-native-reanimated';
export const createPages = _ref => {
  let {
    portrait,
    singleImageMode,
    data
  } = _ref;
  const allPages = [];

  if (portrait) {
    if (!singleImageMode) {
      data.forEach(page => {
        allPages.push({
          left: page,
          right: page
        });
        allPages.push({
          left: page,
          right: page
        });
      });
    } else {
      for (let i = 0; i < data.length; i++) {
        allPages[i] = {
          left: data[i],
          right: data[i]
        };
      }
    }
  } else {
    for (let i = 0; i < data.length; i++) {
      if (singleImageMode) {
        allPages.push({
          left: data[i],
          right: data[i + 1]
        });
        i++;
      } else {
        allPages.push({
          left: data[i],
          right: data[i]
        });
      }
    }
  }

  return allPages;
};
export const transformOrigin = (_ref2, transformations) => {
  'worklet';

  let {
    x,
    y
  } = _ref2;
  return [{
    translateX: x
  }, {
    translateY: y
  }, ...transformations, {
    translateX: -x
  }, {
    translateY: -y
  }];
};

const debug = (msg, val) => {
  console.log(msg, val);
};

export const debugValue = (msg, val) => {
  'worklet';

  runOnJS(debug)(msg, val);
};
export const snapPoint = (value, velocity, points) => {
  'worklet';

  const point = value + 0.25 * velocity;
  const deltas = points.map(p => Math.abs(point - p));
  const minDelta = Math.min.apply(null, deltas);
  return points.filter(p => Math.abs(point - p) === minDelta)[0];
};
export function clamp(number, min, max) {
  'worklet';

  return Math.max(min, Math.min(number, max));
}
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