156 lines
6.0 KiB
JavaScript
156 lines
6.0 KiB
JavaScript
import _toConsumableArray from "@babel/runtime/helpers/esm/toConsumableArray";
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import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
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import * as React from 'react';
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function getPosition(e) {
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var obj = 'touches' in e ? e.touches[0] : e;
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return {
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pageX: obj.pageX,
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pageY: obj.pageY
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};
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}
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export default function useDrag(containerRef, direction, rawValues, min, max, formatValue, triggerChange, finishChange, offsetValues) {
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var _React$useState = React.useState(null),
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_React$useState2 = _slicedToArray(_React$useState, 2),
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draggingValue = _React$useState2[0],
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setDraggingValue = _React$useState2[1];
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var _React$useState3 = React.useState(-1),
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_React$useState4 = _slicedToArray(_React$useState3, 2),
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draggingIndex = _React$useState4[0],
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setDraggingIndex = _React$useState4[1];
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var _React$useState5 = React.useState(rawValues),
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_React$useState6 = _slicedToArray(_React$useState5, 2),
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cacheValues = _React$useState6[0],
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setCacheValues = _React$useState6[1];
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var _React$useState7 = React.useState(rawValues),
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_React$useState8 = _slicedToArray(_React$useState7, 2),
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originValues = _React$useState8[0],
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setOriginValues = _React$useState8[1];
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var mouseMoveEventRef = React.useRef(null);
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var mouseUpEventRef = React.useRef(null);
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React.useEffect(function () {
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if (draggingIndex === -1) {
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setCacheValues(rawValues);
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}
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}, [rawValues, draggingIndex]);
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// Clean up event
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React.useEffect(function () {
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return function () {
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document.removeEventListener('mousemove', mouseMoveEventRef.current);
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document.removeEventListener('mouseup', mouseUpEventRef.current);
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document.removeEventListener('touchmove', mouseMoveEventRef.current);
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document.removeEventListener('touchend', mouseUpEventRef.current);
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};
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}, []);
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var flushValues = function flushValues(nextValues, nextValue) {
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// Perf: Only update state when value changed
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if (cacheValues.some(function (val, i) {
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return val !== nextValues[i];
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})) {
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if (nextValue !== undefined) {
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setDraggingValue(nextValue);
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}
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setCacheValues(nextValues);
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triggerChange(nextValues);
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}
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};
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var updateCacheValue = function updateCacheValue(valueIndex, offsetPercent) {
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// Basic point offset
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if (valueIndex === -1) {
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// >>>> Dragging on the track
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var startValue = originValues[0];
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var endValue = originValues[originValues.length - 1];
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var maxStartOffset = min - startValue;
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var maxEndOffset = max - endValue;
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// Get valid offset
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var offset = offsetPercent * (max - min);
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offset = Math.max(offset, maxStartOffset);
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offset = Math.min(offset, maxEndOffset);
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// Use first value to revert back of valid offset (like steps marks)
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var formatStartValue = formatValue(startValue + offset);
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offset = formatStartValue - startValue;
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var cloneCacheValues = originValues.map(function (val) {
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return val + offset;
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});
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flushValues(cloneCacheValues);
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} else {
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// >>>> Dragging on the handle
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var offsetDist = (max - min) * offsetPercent;
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// Always start with the valueIndex origin value
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var cloneValues = _toConsumableArray(cacheValues);
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cloneValues[valueIndex] = originValues[valueIndex];
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var next = offsetValues(cloneValues, offsetDist, valueIndex, 'dist');
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flushValues(next.values, next.value);
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}
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};
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// Resolve closure
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var updateCacheValueRef = React.useRef(updateCacheValue);
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updateCacheValueRef.current = updateCacheValue;
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var onStartMove = function onStartMove(e, valueIndex) {
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e.stopPropagation();
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var originValue = rawValues[valueIndex];
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setDraggingIndex(valueIndex);
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setDraggingValue(originValue);
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setOriginValues(rawValues);
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var _getPosition = getPosition(e),
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startX = _getPosition.pageX,
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startY = _getPosition.pageY;
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// Moving
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var onMouseMove = function onMouseMove(event) {
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event.preventDefault();
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var _getPosition2 = getPosition(event),
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moveX = _getPosition2.pageX,
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moveY = _getPosition2.pageY;
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var offsetX = moveX - startX;
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var offsetY = moveY - startY;
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var _containerRef$current = containerRef.current.getBoundingClientRect(),
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width = _containerRef$current.width,
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height = _containerRef$current.height;
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var offSetPercent;
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switch (direction) {
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case 'btt':
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offSetPercent = -offsetY / height;
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break;
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case 'ttb':
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offSetPercent = offsetY / height;
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break;
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case 'rtl':
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offSetPercent = -offsetX / width;
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break;
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default:
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offSetPercent = offsetX / width;
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}
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updateCacheValueRef.current(valueIndex, offSetPercent);
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};
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// End
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var onMouseUp = function onMouseUp(event) {
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event.preventDefault();
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document.removeEventListener('mouseup', onMouseUp);
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document.removeEventListener('mousemove', onMouseMove);
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document.removeEventListener('touchend', onMouseUp);
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document.removeEventListener('touchmove', onMouseMove);
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mouseMoveEventRef.current = null;
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mouseUpEventRef.current = null;
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setDraggingIndex(-1);
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finishChange();
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};
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document.addEventListener('mouseup', onMouseUp);
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document.addEventListener('mousemove', onMouseMove);
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document.addEventListener('touchend', onMouseUp);
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document.addEventListener('touchmove', onMouseMove);
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mouseMoveEventRef.current = onMouseMove;
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mouseUpEventRef.current = onMouseUp;
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};
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// Only return cache value when it mapping with rawValues
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var returnValues = React.useMemo(function () {
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var sourceValues = _toConsumableArray(rawValues).sort(function (a, b) {
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return a - b;
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});
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var targetValues = _toConsumableArray(cacheValues).sort(function (a, b) {
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return a - b;
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});
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return sourceValues.every(function (val, index) {
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return val === targetValues[index];
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}) ? cacheValues : rawValues;
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}, [rawValues, cacheValues]);
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return [draggingIndex, draggingValue, returnValues, onStartMove];
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} |