@tamagui/react-native-web-lite/dist/esm/ScrollView/ScrollViewBase.mjs

React Native for Web

import { useMergeRefs } from "@tamagui/react-native-web-internals";
import * as React from "react";
import { View } from "../View/index.mjs";
import { jsx } from "react/jsx-runtime";
function normalizeScrollEvent(e) {
  return {
    nativeEvent: {
      contentOffset: {
        get x() {
          return e.target.scrollLeft;
        },
        get y() {
          return e.target.scrollTop;
        }
      },
      contentSize: {
        get height() {
          return e.target.scrollHeight;
        },
        get width() {
          return e.target.scrollWidth;
        }
      },
      layoutMeasurement: {
        get height() {
          return e.target.offsetHeight;
        },
        get width() {
          return e.target.offsetWidth;
        }
      }
    },
    timeStamp: Date.now()
  };
}
function shouldEmitScrollEvent(lastTick, eventThrottle) {
  const timeSinceLastTick = Date.now() - lastTick;
  return eventThrottle > 0 && timeSinceLastTick >= eventThrottle;
}
const ScrollViewBase = React.forwardRef((props, forwardedRef) => {
  const {
    onScroll,
    onTouchMove,
    onWheel,
    scrollEnabled = true,
    scrollEventThrottle = 0,
    showsHorizontalScrollIndicator,
    showsVerticalScrollIndicator,
    style,
    // strip RN-only props that shouldn't reach the DOM
    onMomentumScrollBegin,
    onMomentumScrollEnd,
    onScrollBeginDrag,
    onScrollEndDrag,
    ...rest
  } = props;
  const scrollState = React.useRef({
    isScrolling: false,
    scrollLastTick: 0
  });
  const scrollTimeout = React.useRef(null);
  const scrollRef = React.useRef(null);
  function createPreventableScrollHandler(handler) {
    return e => {
      if (scrollEnabled) {
        if (handler) {
          handler(e);
        }
      }
    };
  }
  function handleScroll(e) {
    e.stopPropagation();
    if (e.target === scrollRef.current) {
      e.persist();
      if (scrollTimeout.current != null) {
        clearTimeout(scrollTimeout.current);
      }
      scrollTimeout.current = setTimeout(() => {
        handleScrollEnd(e);
      }, 100);
      if (scrollState.current.isScrolling) {
        if (shouldEmitScrollEvent(scrollState.current.scrollLastTick, scrollEventThrottle)) {
          handleScrollTick(e);
        }
      } else {
        handleScrollStart(e);
      }
    }
  }
  function handleScrollStart(e) {
    scrollState.current.isScrolling = true;
    handleScrollTick(e);
  }
  function handleScrollTick(e) {
    scrollState.current.scrollLastTick = Date.now();
    if (onScroll) {
      onScroll(normalizeScrollEvent(e));
    }
  }
  function handleScrollEnd(e) {
    scrollState.current.isScrolling = false;
    if (onScroll) {
      onScroll(normalizeScrollEvent(e));
    }
  }
  const hideHorizontalScrollbar = showsHorizontalScrollIndicator === false;
  const hideVerticalScrollbar = showsVerticalScrollIndicator === false;
  return /* @__PURE__ */jsx(View, {
    ...rest,
    className: "_dsp_contents" + (hideHorizontalScrollbar ? " _hsb-x" : "") + (hideVerticalScrollbar ? " _hsb-y" : ""),
    onScroll: handleScroll,
    onTouchMove: createPreventableScrollHandler(onTouchMove),
    onWheel: createPreventableScrollHandler(onWheel),
    ref: useMergeRefs(scrollRef, forwardedRef),
    style: [style,
    // @ts-ignore
    !scrollEnabled && styles.scrollDisabled]
  });
});
const styles = {
  scrollDisabled: {
    overflowX: "hidden",
    overflowY: "hidden",
    touchAction: "none"
  }
};
var ScrollViewBase_default = ScrollViewBase;
export { ScrollViewBase, ScrollViewBase_default as default };
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