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A collection of 50+ hooks for state and UI management

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{"version":3,"file":"use-drag.cjs","names":[],"sources":["../../src/use-drag/use-drag.ts"],"sourcesContent":["// Required to disable for webkit-user-select, although deprecated, it is still required for Safari support\n/* eslint-disable @typescript-eslint/no-deprecated */\nimport { useCallback, useRef, useState } from 'react';\n\ntype Vector2 = [number, number];\n\nexport interface UseDragState {\n /** Current pointer position [x, y] */\n xy: Vector2;\n\n /** Position where the gesture started [x, y] */\n initial: Vector2;\n\n /** Displacement from start [x, y], respects axis constraint */\n movement: Vector2;\n\n /** Change since previous event [x, y] */\n delta: Vector2;\n\n /** Absolute distance per axis [x, y] */\n distance: Vector2;\n\n /** Movement direction per axis: -1, 0, or 1 */\n direction: Vector2;\n\n /** Speed per axis in px/ms */\n velocity: Vector2;\n\n /** Time since drag started in ms */\n elapsedTime: number;\n\n /** `true` on the first handler call after the threshold is met */\n first: boolean;\n\n /** `true` on the last handler call (pointer released or canceled) */\n last: boolean;\n\n /** `true` while the gesture is ongoing */\n active: boolean;\n\n /** `true` when the gesture qualifies as a tap (requires `filterTaps: true`) */\n tap: boolean;\n\n /** `true` when the gesture was interrupted by a `pointercancel` event */\n canceled: boolean;\n\n /** Function to programmatically cancel the current gesture */\n cancel: () => void;\n\n /** The source `PointerEvent` */\n event: PointerEvent;\n}\n\nexport interface UseDragOptions {\n /** Constrain movement to a specific axis. `'lock'` locks to whichever axis has more movement after `axisThreshold` is exceeded. */\n axis?: 'x' | 'y' | 'lock';\n\n /** Movement in px required to determine axis when `axis` is `'lock'`, `1` by default */\n axisThreshold?: number;\n\n /** When `true`, the last state includes `tap: true` when total distance is below `tapThreshold`, `false` by default */\n filterTaps?: boolean;\n\n /** Max displacement in px to still be considered a tap, `3` by default */\n tapThreshold?: number;\n\n /** Minimum displacement in px before the drag activates. Can be a number (both axes) or `[x, y]`. `0` by default */\n threshold?: number | Vector2;\n\n /** Enable or disable the hook, `true` by default */\n enabled?: boolean;\n}\n\nexport interface UseDragReturnValue<T extends HTMLElement = any> {\n /** Ref callback to attach to the draggable element */\n ref: React.RefCallback<T | null>;\n\n /** `true` while the element is being dragged */\n active: boolean;\n}\n\nconst VELOCITY_DECAY_MS = 100;\n\nfunction sign(n: number): -1 | 0 | 1 {\n if (n > 0) {\n return 1;\n }\n if (n < 0) {\n return -1;\n }\n return 0;\n}\n\nfunction getThresholdVector(threshold: number | Vector2 | undefined): Vector2 {\n const t = threshold ?? 0;\n if (typeof t === 'number') {\n return [t, t];\n }\n return t;\n}\n\ninterface DragInternalState {\n isActive: boolean;\n pointerId: number;\n startXY: Vector2;\n prevXY: Vector2;\n startTimestamp: number;\n prevTimestamp: number;\n thresholdMet: boolean;\n firstFired: boolean;\n lockedAxis: 'x' | 'y' | null;\n canceled: boolean;\n lastVelocity: Vector2;\n}\n\nfunction createInitialState(): DragInternalState {\n return {\n isActive: false,\n pointerId: -1,\n startXY: [0, 0],\n prevXY: [0, 0],\n startTimestamp: 0,\n prevTimestamp: 0,\n thresholdMet: false,\n firstFired: false,\n lockedAxis: null,\n canceled: false,\n lastVelocity: [0, 0],\n };\n}\n\nexport function useDrag<T extends HTMLElement = any>(\n handler: (state: UseDragState) => void,\n options: UseDragOptions = {}\n): UseDragReturnValue<T> {\n const [active, setActive] = useState(false);\n\n const handlerRef = useRef(handler);\n handlerRef.current = handler;\n\n const optionsRef = useRef(options);\n optionsRef.current = options;\n\n const stateRef = useRef<DragInternalState>(createInitialState());\n const documentControllerRef = useRef<AbortController | null>(null);\n\n const refCallback: React.RefCallback<T | null> = useCallback((node) => {\n if (!node) {\n return undefined;\n }\n\n const elementController = new AbortController();\n\n const applyAxisConstraint = (v: Vector2): Vector2 => {\n const opts = optionsRef.current;\n const s = stateRef.current;\n\n if (opts.axis === 'x') {\n return [v[0], 0];\n }\n if (opts.axis === 'y') {\n return [0, v[1]];\n }\n if (opts.axis === 'lock') {\n if (s.lockedAxis === null) {\n const t = opts.axisThreshold ?? 1;\n if (Math.abs(v[0]) > t || Math.abs(v[1]) > t) {\n s.lockedAxis = Math.abs(v[0]) >= Math.abs(v[1]) ? 'x' : 'y';\n }\n }\n if (s.lockedAxis === 'x') {\n return [v[0], 0];\n }\n if (s.lockedAxis === 'y') {\n return [0, v[1]];\n }\n }\n return v;\n };\n\n const resetDrag = () => {\n const s = stateRef.current;\n s.isActive = false;\n s.pointerId = -1;\n s.thresholdMet = false;\n s.firstFired = false;\n s.lockedAxis = null;\n s.canceled = false;\n setActive(false);\n document.body.style.userSelect = '';\n document.body.style.webkitUserSelect = '';\n documentControllerRef.current?.abort();\n documentControllerRef.current = null;\n };\n\n const cancel = () => {\n if (stateRef.current.isActive) {\n stateRef.current.canceled = true;\n resetDrag();\n }\n };\n\n const activateDrag = () => {\n setActive(true);\n document.body.style.userSelect = 'none';\n document.body.style.webkitUserSelect = 'none';\n };\n\n const onPointerDown = (event: PointerEvent) => {\n if (optionsRef.current.enabled === false) {\n return;\n }\n if (event.button !== 0) {\n return;\n }\n if (stateRef.current.isActive) {\n return;\n }\n\n const s = stateRef.current;\n s.isActive = true;\n s.pointerId = event.pointerId;\n s.startXY = [event.clientX, event.clientY];\n s.prevXY = [event.clientX, event.clientY];\n s.startTimestamp = event.timeStamp;\n s.prevTimestamp = event.timeStamp;\n s.thresholdMet = false;\n s.firstFired = false;\n s.lockedAxis = null;\n s.canceled = false;\n s.lastVelocity = [0, 0];\n\n const [tx, ty] = getThresholdVector(optionsRef.current.threshold);\n if (tx === 0 && ty === 0) {\n s.thresholdMet = true;\n s.firstFired = true;\n activateDrag();\n\n handlerRef.current({\n xy: [event.clientX, event.clientY],\n initial: [event.clientX, event.clientY],\n movement: [0, 0],\n delta: [0, 0],\n distance: [0, 0],\n direction: [0, 0],\n velocity: [0, 0],\n elapsedTime: 0,\n first: true,\n last: false,\n active: true,\n tap: false,\n canceled: false,\n cancel,\n event,\n });\n }\n\n documentControllerRef.current?.abort();\n documentControllerRef.current = new AbortController();\n const sig = documentControllerRef.current.signal;\n\n document.addEventListener('pointermove', onPointerMove, { signal: sig });\n document.addEventListener('pointerup', onPointerUp, { signal: sig });\n document.addEventListener('pointercancel', onPointerCancel, { signal: sig });\n };\n\n const onPointerMove = (event: PointerEvent) => {\n const s = stateRef.current;\n if (!s.isActive || event.pointerId !== s.pointerId) {\n return;\n }\n\n const rawMovement: Vector2 = [event.clientX - s.startXY[0], event.clientY - s.startXY[1]];\n\n if (!s.thresholdMet) {\n const [tx, ty] = getThresholdVector(optionsRef.current.threshold);\n if (Math.abs(rawMovement[0]) < tx && Math.abs(rawMovement[1]) < ty) {\n s.prevXY = [event.clientX, event.clientY];\n s.prevTimestamp = event.timeStamp;\n return;\n }\n s.thresholdMet = true;\n activateDrag();\n }\n\n const movement = applyAxisConstraint(rawMovement);\n const rawDelta: Vector2 = [event.clientX - s.prevXY[0], event.clientY - s.prevXY[1]];\n const delta = applyAxisConstraint(rawDelta);\n const timeDelta = event.timeStamp - s.prevTimestamp;\n const velocity: Vector2 =\n timeDelta > 0\n ? [Math.abs(delta[0]) / timeDelta, Math.abs(delta[1]) / timeDelta]\n : s.lastVelocity;\n\n s.lastVelocity = velocity;\n const isFirst = !s.firstFired;\n s.firstFired = true;\n s.prevXY = [event.clientX, event.clientY];\n s.prevTimestamp = event.timeStamp;\n\n handlerRef.current({\n xy: [event.clientX, event.clientY],\n initial: [...s.startXY],\n movement,\n delta,\n distance: [Math.abs(movement[0]), Math.abs(movement[1])],\n direction: [sign(delta[0]), sign(delta[1])],\n velocity,\n elapsedTime: event.timeStamp - s.startTimestamp,\n first: isFirst,\n last: false,\n active: true,\n tap: false,\n canceled: false,\n cancel,\n event,\n });\n };\n\n const onPointerUp = (event: PointerEvent) => {\n const s = stateRef.current;\n if (!s.isActive || event.pointerId !== s.pointerId) {\n return;\n }\n\n const opts = optionsRef.current;\n\n if (!s.thresholdMet) {\n if (opts.filterTaps) {\n const rawMov: Vector2 = [event.clientX - s.startXY[0], event.clientY - s.startXY[1]];\n const mov = applyAxisConstraint(rawMov);\n const dist: Vector2 = [Math.abs(mov[0]), Math.abs(mov[1])];\n const maxDist = Math.max(dist[0], dist[1]);\n const isTap = maxDist < (opts.tapThreshold ?? 3);\n\n handlerRef.current({\n xy: [event.clientX, event.clientY],\n initial: [...s.startXY],\n movement: mov,\n delta: mov,\n distance: dist,\n direction: [sign(mov[0]), sign(mov[1])],\n velocity: [0, 0],\n elapsedTime: event.timeStamp - s.startTimestamp,\n first: true,\n last: true,\n active: false,\n tap: isTap,\n canceled: false,\n cancel,\n event,\n });\n }\n resetDrag();\n return;\n }\n\n const rawMovement: Vector2 = [event.clientX - s.startXY[0], event.clientY - s.startXY[1]];\n const movement = applyAxisConstraint(rawMovement);\n const distance: Vector2 = [Math.abs(movement[0]), Math.abs(movement[1])];\n const rawDelta: Vector2 = [event.clientX - s.prevXY[0], event.clientY - s.prevXY[1]];\n const delta = applyAxisConstraint(rawDelta);\n\n const timeSinceLastMove = event.timeStamp - s.prevTimestamp;\n const velocity: Vector2 = timeSinceLastMove > VELOCITY_DECAY_MS ? [0, 0] : s.lastVelocity;\n\n const maxDistance = Math.max(distance[0], distance[1]);\n const tap = opts.filterTaps === true && maxDistance < (opts.tapThreshold ?? 3);\n\n handlerRef.current({\n xy: [event.clientX, event.clientY],\n initial: [...s.startXY],\n movement,\n delta,\n distance,\n direction: [sign(delta[0]), sign(delta[1])],\n velocity,\n elapsedTime: event.timeStamp - s.startTimestamp,\n first: !s.firstFired,\n last: true,\n active: false,\n tap,\n canceled: false,\n cancel,\n event,\n });\n\n resetDrag();\n };\n\n const onPointerCancel = (event: PointerEvent) => {\n const s = stateRef.current;\n if (!s.isActive || event.pointerId !== s.pointerId) {\n return;\n }\n\n const rawMovement: Vector2 = [event.clientX - s.startXY[0], event.clientY - s.startXY[1]];\n const movement = applyAxisConstraint(rawMovement);\n\n handlerRef.current({\n xy: [event.clientX, event.clientY],\n initial: [...s.startXY],\n movement,\n delta: [0, 0],\n distance: [Math.abs(movement[0]), Math.abs(movement[1])],\n direction: [0, 0],\n velocity: [0, 0],\n elapsedTime: event.timeStamp - s.startTimestamp,\n first: !s.firstFired,\n last: true,\n active: false,\n tap: false,\n canceled: true,\n cancel,\n event,\n });\n\n resetDrag();\n };\n\n node.addEventListener('pointerdown', onPointerDown, {\n signal: elementController.signal,\n });\n\n return () => {\n elementController.abort();\n documentControllerRef.current?.abort();\n documentControllerRef.current = null;\n if (stateRef.current.isActive) {\n stateRef.current.isActive = false;\n setActive(false);\n document.body.style.userSelect = '';\n document.body.style.webkitUserSelect = '';\n }\n };\n }, []);\n\n return { ref: refCallback, active };\n}\n\nexport namespace useDrag {\n export type State = UseDragState;\n export type Options = UseDragOptions;\n export type ReturnValue<T extends HTMLElement = any> = 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