'use strict';

var maths = require('./maths-83bc6f64.cjs.prod.js');

function _toPrimitive(input, hint) {
  if (typeof input !== "object" || input === null) return input;
  var prim = input[Symbol.toPrimitive];
  if (prim !== undefined) {
    var res = prim.call(input, hint || "default");
    if (typeof res !== "object") return res;
    throw new TypeError("@@toPrimitive must return a primitive value.");
  }
  return (hint === "string" ? String : Number)(input);
}

function _toPropertyKey(arg) {
  var key = _toPrimitive(arg, "string");
  return typeof key === "symbol" ? key : String(key);
}

function _defineProperty(obj, key, value) {
  key = _toPropertyKey(key);
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}

function ownKeys(e, r) {
  var t = Object.keys(e);
  if (Object.getOwnPropertySymbols) {
    var o = Object.getOwnPropertySymbols(e);
    r && (o = o.filter(function (r) {
      return Object.getOwnPropertyDescriptor(e, r).enumerable;
    })), t.push.apply(t, o);
  }
  return t;
}
function _objectSpread2(e) {
  for (var r = 1; r < arguments.length; r++) {
    var t = null != arguments[r] ? arguments[r] : {};
    r % 2 ? ownKeys(Object(t), !0).forEach(function (r) {
      _defineProperty(e, r, t[r]);
    }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) {
      Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
    });
  }
  return e;
}

const EVENT_TYPE_MAP = {
  pointer: {
    start: 'down',
    change: 'move',
    end: 'up'
  },
  mouse: {
    start: 'down',
    change: 'move',
    end: 'up'
  },
  touch: {
    start: 'start',
    change: 'move',
    end: 'end'
  },
  gesture: {
    start: 'start',
    change: 'change',
    end: 'end'
  }
};
function capitalize(string) {
  if (!string) return '';
  return string[0].toUpperCase() + string.slice(1);
}
const actionsWithoutCaptureSupported = ['enter', 'leave'];
function hasCapture(capture = false, actionKey) {
  return capture && !actionsWithoutCaptureSupported.includes(actionKey);
}
function toHandlerProp(device, action = '', capture = false) {
  const deviceProps = EVENT_TYPE_MAP[device];
  const actionKey = deviceProps ? deviceProps[action] || action : action;
  return 'on' + capitalize(device) + capitalize(actionKey) + (hasCapture(capture, actionKey) ? 'Capture' : '');
}
const pointerCaptureEvents = ['gotpointercapture', 'lostpointercapture'];
function parseProp(prop) {
  let eventKey = prop.substring(2).toLowerCase();
  const passive = !!~eventKey.indexOf('passive');
  if (passive) eventKey = eventKey.replace('passive', '');
  const captureKey = pointerCaptureEvents.includes(eventKey) ? 'capturecapture' : 'capture';
  const capture = !!~eventKey.indexOf(captureKey);
  if (capture) eventKey = eventKey.replace('capture', '');
  return {
    device: eventKey,
    capture,
    passive
  };
}
function toDomEventType(device, action = '') {
  const deviceProps = EVENT_TYPE_MAP[device];
  const actionKey = deviceProps ? deviceProps[action] || action : action;
  return device + actionKey;
}
function isTouch(event) {
  return 'touches' in event;
}
function getPointerType(event) {
  if (isTouch(event)) return 'touch';
  if ('pointerType' in event) return event.pointerType;
  return 'mouse';
}
function getCurrentTargetTouchList(event) {
  return Array.from(event.touches).filter(e => {
    var _event$currentTarget, _event$currentTarget$;
    return e.target === event.currentTarget || ((_event$currentTarget = event.currentTarget) === null || _event$currentTarget === void 0 || (_event$currentTarget$ = _event$currentTarget.contains) === null || _event$currentTarget$ === void 0 ? void 0 : _event$currentTarget$.call(_event$currentTarget, e.target));
  });
}
function getTouchList(event) {
  return event.type === 'touchend' || event.type === 'touchcancel' ? event.changedTouches : event.targetTouches;
}
function getValueEvent(event) {
  return isTouch(event) ? getTouchList(event)[0] : event;
}
function distanceAngle(P1, P2) {
  try {
    const dx = P2.clientX - P1.clientX;
    const dy = P2.clientY - P1.clientY;
    const cx = (P2.clientX + P1.clientX) / 2;
    const cy = (P2.clientY + P1.clientY) / 2;
    const distance = Math.hypot(dx, dy);
    const angle = -(Math.atan2(dx, dy) * 180) / Math.PI;
    const origin = [cx, cy];
    return {
      angle,
      distance,
      origin
    };
  } catch (_unused) {}
  return null;
}
function touchIds(event) {
  return getCurrentTargetTouchList(event).map(touch => touch.identifier);
}
function touchDistanceAngle(event, ids) {
  const [P1, P2] = Array.from(event.touches).filter(touch => ids.includes(touch.identifier));
  return distanceAngle(P1, P2);
}
function pointerId(event) {
  const valueEvent = getValueEvent(event);
  return isTouch(event) ? valueEvent.identifier : valueEvent.pointerId;
}
function pointerValues(event) {
  const valueEvent = getValueEvent(event);
  return [valueEvent.clientX, valueEvent.clientY];
}
const LINE_HEIGHT = 40;
const PAGE_HEIGHT = 800;
function wheelValues(event) {
  let {
    deltaX,
    deltaY,
    deltaMode
  } = event;
  if (deltaMode === 1) {
    deltaX *= LINE_HEIGHT;
    deltaY *= LINE_HEIGHT;
  } else if (deltaMode === 2) {
    deltaX *= PAGE_HEIGHT;
    deltaY *= PAGE_HEIGHT;
  }
  return [deltaX, deltaY];
}
function scrollValues(event) {
  var _ref, _ref2;
  const {
    scrollX,
    scrollY,
    scrollLeft,
    scrollTop
  } = event.currentTarget;
  return [(_ref = scrollX !== null && scrollX !== void 0 ? scrollX : scrollLeft) !== null && _ref !== void 0 ? _ref : 0, (_ref2 = scrollY !== null && scrollY !== void 0 ? scrollY : scrollTop) !== null && _ref2 !== void 0 ? _ref2 : 0];
}
function getEventDetails(event) {
  const payload = {};
  if ('buttons' in event) payload.buttons = event.buttons;
  if ('shiftKey' in event) {
    const {
      shiftKey,
      altKey,
      metaKey,
      ctrlKey
    } = event;
    Object.assign(payload, {
      shiftKey,
      altKey,
      metaKey,
      ctrlKey
    });
  }
  return payload;
}

function call(v, ...args) {
  if (typeof v === 'function') {
    return v(...args);
  } else {
    return v;
  }
}
function noop() {}
function chain(...fns) {
  if (fns.length === 0) return noop;
  if (fns.length === 1) return fns[0];
  return function () {
    let result;
    for (const fn of fns) {
      result = fn.apply(this, arguments) || result;
    }
    return result;
  };
}
function assignDefault(value, fallback) {
  return Object.assign({}, fallback, value || {});
}

const BEFORE_LAST_KINEMATICS_DELAY = 32;
class Engine {
  constructor(ctrl, args, key) {
    this.ctrl = ctrl;
    this.args = args;
    this.key = key;
    if (!this.state) {
      this.state = {};
      this.computeValues([0, 0]);
      this.computeInitial();
      if (this.init) this.init();
      this.reset();
    }
  }
  get state() {
    return this.ctrl.state[this.key];
  }
  set state(state) {
    this.ctrl.state[this.key] = state;
  }
  get shared() {
    return this.ctrl.state.shared;
  }
  get eventStore() {
    return this.ctrl.gestureEventStores[this.key];
  }
  get timeoutStore() {
    return this.ctrl.gestureTimeoutStores[this.key];
  }
  get config() {
    return this.ctrl.config[this.key];
  }
  get sharedConfig() {
    return this.ctrl.config.shared;
  }
  get handler() {
    return this.ctrl.handlers[this.key];
  }
  reset() {
    const {
      state,
      shared,
      ingKey,
      args
    } = this;
    shared[ingKey] = state._active = state.active = state._blocked = state._force = false;
    state._step = [false, false];
    state.intentional = false;
    state._movement = [0, 0];
    state._distance = [0, 0];
    state._direction = [0, 0];
    state._delta = [0, 0];
    state._bounds = [[-Infinity, Infinity], [-Infinity, Infinity]];
    state.args = args;
    state.axis = undefined;
    state.memo = undefined;
    state.elapsedTime = state.timeDelta = 0;
    state.direction = [0, 0];
    state.distance = [0, 0];
    state.overflow = [0, 0];
    state._movementBound = [false, false];
    state.velocity = [0, 0];
    state.movement = [0, 0];
    state.delta = [0, 0];
    state.timeStamp = 0;
  }
  start(event) {
    const state = this.state;
    const config = this.config;
    if (!state._active) {
      this.reset();
      this.computeInitial();
      state._active = true;
      state.target = event.target;
      state.currentTarget = event.currentTarget;
      state.lastOffset = config.from ? call(config.from, state) : state.offset;
      state.offset = state.lastOffset;
      state.startTime = state.timeStamp = event.timeStamp;
    }
  }
  computeValues(values) {
    const state = this.state;
    state._values = values;
    state.values = this.config.transform(values);
  }
  computeInitial() {
    const state = this.state;
    state._initial = state._values;
    state.initial = state.values;
  }
  compute(event) {
    const {
      state,
      config,
      shared
    } = this;
    state.args = this.args;
    let dt = 0;
    if (event) {
      state.event = event;
      if (config.preventDefault && event.cancelable) state.event.preventDefault();
      state.type = event.type;
      shared.touches = this.ctrl.pointerIds.size || this.ctrl.touchIds.size;
      shared.locked = !!document.pointerLockElement;
      Object.assign(shared, getEventDetails(event));
      shared.down = shared.pressed = shared.buttons % 2 === 1 || shared.touches > 0;
      dt = event.timeStamp - state.timeStamp;
      state.timeStamp = event.timeStamp;
      state.elapsedTime = state.timeStamp - state.startTime;
    }
    if (state._active) {
      const _absoluteDelta = state._delta.map(Math.abs);
      maths.V.addTo(state._distance, _absoluteDelta);
    }
    if (this.axisIntent) this.axisIntent(event);
    const [_m0, _m1] = state._movement;
    const [t0, t1] = config.threshold;
    const {
      _step,
      values
    } = state;
    if (config.hasCustomTransform) {
      if (_step[0] === false) _step[0] = Math.abs(_m0) >= t0 && values[0];
      if (_step[1] === false) _step[1] = Math.abs(_m1) >= t1 && values[1];
    } else {
      if (_step[0] === false) _step[0] = Math.abs(_m0) >= t0 && Math.sign(_m0) * t0;
      if (_step[1] === false) _step[1] = Math.abs(_m1) >= t1 && Math.sign(_m1) * t1;
    }
    state.intentional = _step[0] !== false || _step[1] !== false;
    if (!state.intentional) return;
    const movement = [0, 0];
    if (config.hasCustomTransform) {
      const [v0, v1] = values;
      movement[0] = _step[0] !== false ? v0 - _step[0] : 0;
      movement[1] = _step[1] !== false ? v1 - _step[1] : 0;
    } else {
      movement[0] = _step[0] !== false ? _m0 - _step[0] : 0;
      movement[1] = _step[1] !== false ? _m1 - _step[1] : 0;
    }
    if (this.restrictToAxis && !state._blocked) this.restrictToAxis(movement);
    const previousOffset = state.offset;
    const gestureIsActive = state._active && !state._blocked || state.active;
    if (gestureIsActive) {
      state.first = state._active && !state.active;
      state.last = !state._active && state.active;
      state.active = shared[this.ingKey] = state._active;
      if (event) {
        if (state.first) {
          if ('bounds' in config) state._bounds = call(config.bounds, state);
          if (this.setup) this.setup();
        }
        state.movement = movement;
        this.computeOffset();
      }
    }
    const [ox, oy] = state.offset;
    const [[x0, x1], [y0, y1]] = state._bounds;
    state.overflow = [ox < x0 ? -1 : ox > x1 ? 1 : 0, oy < y0 ? -1 : oy > y1 ? 1 : 0];
    state._movementBound[0] = state.overflow[0] ? state._movementBound[0] === false ? state._movement[0] : state._movementBound[0] : false;
    state._movementBound[1] = state.overflow[1] ? state._movementBound[1] === false ? state._movement[1] : state._movementBound[1] : false;
    const rubberband = state._active ? config.rubberband || [0, 0] : [0, 0];
    state.offset = maths.computeRubberband(state._bounds, state.offset, rubberband);
    state.delta = maths.V.sub(state.offset, previousOffset);
    this.computeMovement();
    if (gestureIsActive && (!state.last || dt > BEFORE_LAST_KINEMATICS_DELAY)) {
      state.delta = maths.V.sub(state.offset, previousOffset);
      const absoluteDelta = state.delta.map(Math.abs);
      maths.V.addTo(state.distance, absoluteDelta);
      state.direction = state.delta.map(Math.sign);
      state._direction = state._delta.map(Math.sign);
      if (!state.first && dt > 0) {
        state.velocity = [absoluteDelta[0] / dt, absoluteDelta[1] / dt];
        state.timeDelta = dt;
      }
    }
  }
  emit() {
    const state = this.state;
    const shared = this.shared;
    const config = this.config;
    if (!state._active) this.clean();
    if ((state._blocked || !state.intentional) && !state._force && !config.triggerAllEvents) return;
    const memo = this.handler(_objectSpread2(_objectSpread2(_objectSpread2({}, shared), state), {}, {
      [this.aliasKey]: state.values
    }));
    if (memo !== undefined) state.memo = memo;
  }
  clean() {
    this.eventStore.clean();
    this.timeoutStore.clean();
  }
}

function selectAxis([dx, dy], threshold) {
  const absDx = Math.abs(dx);
  const absDy = Math.abs(dy);
  if (absDx > absDy && absDx > threshold) {
    return 'x';
  }
  if (absDy > absDx && absDy > threshold) {
    return 'y';
  }
  return undefined;
}
class CoordinatesEngine extends Engine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "aliasKey", 'xy');
  }
  reset() {
    super.reset();
    this.state.axis = undefined;
  }
  init() {
    this.state.offset = [0, 0];
    this.state.lastOffset = [0, 0];
  }
  computeOffset() {
    this.state.offset = maths.V.add(this.state.lastOffset, this.state.movement);
  }
  computeMovement() {
    this.state.movement = maths.V.sub(this.state.offset, this.state.lastOffset);
  }
  axisIntent(event) {
    const state = this.state;
    const config = this.config;
    if (!state.axis && event) {
      const threshold = typeof config.axisThreshold === 'object' ? config.axisThreshold[getPointerType(event)] : config.axisThreshold;
      state.axis = selectAxis(state._movement, threshold);
    }
    state._blocked = (config.lockDirection || !!config.axis) && !state.axis || !!config.axis && config.axis !== state.axis;
  }
  restrictToAxis(v) {
    if (this.config.axis || this.config.lockDirection) {
      switch (this.state.axis) {
        case 'x':
          v[1] = 0;
          break;
        case 'y':
          v[0] = 0;
          break;
      }
    }
  }
}

const identity = v => v;
const DEFAULT_RUBBERBAND = 0.15;
const commonConfigResolver = {
  enabled(value = true) {
    return value;
  },
  eventOptions(value, _k, config) {
    return _objectSpread2(_objectSpread2({}, config.shared.eventOptions), value);
  },
  preventDefault(value = false) {
    return value;
  },
  triggerAllEvents(value = false) {
    return value;
  },
  rubberband(value = 0) {
    switch (value) {
      case true:
        return [DEFAULT_RUBBERBAND, DEFAULT_RUBBERBAND];
      case false:
        return [0, 0];
      default:
        return maths.V.toVector(value);
    }
  },
  from(value) {
    if (typeof value === 'function') return value;
    if (value != null) return maths.V.toVector(value);
  },
  transform(value, _k, config) {
    const transform = value || config.shared.transform;
    this.hasCustomTransform = !!transform;
    return transform || identity;
  },
  threshold(value) {
    return maths.V.toVector(value, 0);
  }
};

const DEFAULT_AXIS_THRESHOLD = 0;
const coordinatesConfigResolver = _objectSpread2(_objectSpread2({}, commonConfigResolver), {}, {
  axis(_v, _k, {
    axis
  }) {
    this.lockDirection = axis === 'lock';
    if (!this.lockDirection) return axis;
  },
  axisThreshold(value = DEFAULT_AXIS_THRESHOLD) {
    return value;
  },
  bounds(value = {}) {
    if (typeof value === 'function') {
      return state => coordinatesConfigResolver.bounds(value(state));
    }
    if ('current' in value) {
      return () => value.current;
    }
    if (typeof HTMLElement === 'function' && value instanceof HTMLElement) {
      return value;
    }
    const {
      left = -Infinity,
      right = Infinity,
      top = -Infinity,
      bottom = Infinity
    } = value;
    return [[left, right], [top, bottom]];
  }
});

const KEYS_DELTA_MAP = {
  ArrowRight: (displacement, factor = 1) => [displacement * factor, 0],
  ArrowLeft: (displacement, factor = 1) => [-1 * displacement * factor, 0],
  ArrowUp: (displacement, factor = 1) => [0, -1 * displacement * factor],
  ArrowDown: (displacement, factor = 1) => [0, displacement * factor]
};
class DragEngine extends CoordinatesEngine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "ingKey", 'dragging');
  }
  reset() {
    super.reset();
    const state = this.state;
    state._pointerId = undefined;
    state._pointerActive = false;
    state._keyboardActive = false;
    state._preventScroll = false;
    state._delayed = false;
    state.swipe = [0, 0];
    state.tap = false;
    state.canceled = false;
    state.cancel = this.cancel.bind(this);
  }
  setup() {
    const state = this.state;
    if (state._bounds instanceof HTMLElement) {
      const boundRect = state._bounds.getBoundingClientRect();
      const targetRect = state.currentTarget.getBoundingClientRect();
      const _bounds = {
        left: boundRect.left - targetRect.left + state.offset[0],
        right: boundRect.right - targetRect.right + state.offset[0],
        top: boundRect.top - targetRect.top + state.offset[1],
        bottom: boundRect.bottom - targetRect.bottom + state.offset[1]
      };
      state._bounds = coordinatesConfigResolver.bounds(_bounds);
    }
  }
  cancel() {
    const state = this.state;
    if (state.canceled) return;
    state.canceled = true;
    state._active = false;
    setTimeout(() => {
      this.compute();
      this.emit();
    }, 0);
  }
  setActive() {
    this.state._active = this.state._pointerActive || this.state._keyboardActive;
  }
  clean() {
    this.pointerClean();
    this.state._pointerActive = false;
    this.state._keyboardActive = false;
    super.clean();
  }
  pointerDown(event) {
    const config = this.config;
    const state = this.state;
    if (event.buttons != null && (Array.isArray(config.pointerButtons) ? !config.pointerButtons.includes(event.buttons) : config.pointerButtons !== -1 && config.pointerButtons !== event.buttons)) return;
    const ctrlIds = this.ctrl.setEventIds(event);
    if (config.pointerCapture) {
      event.target.setPointerCapture(event.pointerId);
    }
    if (ctrlIds && ctrlIds.size > 1 && state._pointerActive) return;
    this.start(event);
    this.setupPointer(event);
    state._pointerId = pointerId(event);
    state._pointerActive = true;
    this.computeValues(pointerValues(event));
    this.computeInitial();
    if (config.preventScrollAxis && getPointerType(event) !== 'mouse') {
      state._active = false;
      this.setupScrollPrevention(event);
    } else if (config.delay > 0) {
      this.setupDelayTrigger(event);
      if (config.triggerAllEvents) {
        this.compute(event);
        this.emit();
      }
    } else {
      this.startPointerDrag(event);
    }
  }
  startPointerDrag(event) {
    const state = this.state;
    state._active = true;
    state._preventScroll = true;
    state._delayed = false;
    this.compute(event);
    this.emit();
  }
  pointerMove(event) {
    const state = this.state;
    const config = this.config;
    if (!state._pointerActive) return;
    const id = pointerId(event);
    if (state._pointerId !== undefined && id !== state._pointerId) return;
    const _values = pointerValues(event);
    if (document.pointerLockElement === event.target) {
      state._delta = [event.movementX, event.movementY];
    } else {
      state._delta = maths.V.sub(_values, state._values);
      this.computeValues(_values);
    }
    maths.V.addTo(state._movement, state._delta);
    this.compute(event);
    if (state._delayed && state.intentional) {
      this.timeoutStore.remove('dragDelay');
      state.active = false;
      this.startPointerDrag(event);
      return;
    }
    if (config.preventScrollAxis && !state._preventScroll) {
      if (state.axis) {
        if (state.axis === config.preventScrollAxis || config.preventScrollAxis === 'xy') {
          state._active = false;
          this.clean();
          return;
        } else {
          this.timeoutStore.remove('startPointerDrag');
          this.startPointerDrag(event);
          return;
        }
      } else {
        return;
      }
    }
    this.emit();
  }
  pointerUp(event) {
    this.ctrl.setEventIds(event);
    try {
      if (this.config.pointerCapture && event.target.hasPointerCapture(event.pointerId)) {
        ;
        event.target.releasePointerCapture(event.pointerId);
      }
    } catch (_unused) {
    }
    const state = this.state;
    const config = this.config;
    if (!state._active || !state._pointerActive) return;
    const id = pointerId(event);
    if (state._pointerId !== undefined && id !== state._pointerId) return;
    this.state._pointerActive = false;
    this.setActive();
    this.compute(event);
    const [dx, dy] = state._distance;
    state.tap = dx <= config.tapsThreshold && dy <= config.tapsThreshold;
    if (state.tap && config.filterTaps) {
      state._force = true;
    } else {
      const [_dx, _dy] = state._delta;
      const [_mx, _my] = state._movement;
      const [svx, svy] = config.swipe.velocity;
      const [sx, sy] = config.swipe.distance;
      const sdt = config.swipe.duration;
      if (state.elapsedTime < sdt) {
        const _vx = Math.abs(_dx / state.timeDelta);
        const _vy = Math.abs(_dy / state.timeDelta);
        if (_vx > svx && Math.abs(_mx) > sx) state.swipe[0] = Math.sign(_dx);
        if (_vy > svy && Math.abs(_my) > sy) state.swipe[1] = Math.sign(_dy);
      }
    }
    this.emit();
  }
  pointerClick(event) {
    if (!this.state.tap && event.detail > 0) {
      event.preventDefault();
      event.stopPropagation();
    }
  }
  setupPointer(event) {
    const config = this.config;
    const device = config.device;
    if (config.pointerLock) {
      event.currentTarget.requestPointerLock();
    }
    if (!config.pointerCapture) {
      this.eventStore.add(this.sharedConfig.window, device, 'change', this.pointerMove.bind(this));
      this.eventStore.add(this.sharedConfig.window, device, 'end', this.pointerUp.bind(this));
      this.eventStore.add(this.sharedConfig.window, device, 'cancel', this.pointerUp.bind(this));
    }
  }
  pointerClean() {
    if (this.config.pointerLock && document.pointerLockElement === this.state.currentTarget) {
      document.exitPointerLock();
    }
  }
  preventScroll(event) {
    if (this.state._preventScroll && event.cancelable) {
      event.preventDefault();
    }
  }
  setupScrollPrevention(event) {
    this.state._preventScroll = false;
    persistEvent(event);
    const remove = this.eventStore.add(this.sharedConfig.window, 'touch', 'change', this.preventScroll.bind(this), {
      passive: false
    });
    this.eventStore.add(this.sharedConfig.window, 'touch', 'end', remove);
    this.eventStore.add(this.sharedConfig.window, 'touch', 'cancel', remove);
    this.timeoutStore.add('startPointerDrag', this.startPointerDrag.bind(this), this.config.preventScrollDelay, event);
  }
  setupDelayTrigger(event) {
    this.state._delayed = true;
    this.timeoutStore.add('dragDelay', () => {
      this.state._step = [0, 0];
      this.startPointerDrag(event);
    }, this.config.delay);
  }
  keyDown(event) {
    const deltaFn = KEYS_DELTA_MAP[event.key];
    if (deltaFn) {
      const state = this.state;
      const factor = event.shiftKey ? 10 : event.altKey ? 0.1 : 1;
      this.start(event);
      state._delta = deltaFn(this.config.keyboardDisplacement, factor);
      state._keyboardActive = true;
      maths.V.addTo(state._movement, state._delta);
      this.compute(event);
      this.emit();
    }
  }
  keyUp(event) {
    if (!(event.key in KEYS_DELTA_MAP)) return;
    this.state._keyboardActive = false;
    this.setActive();
    this.compute(event);
    this.emit();
  }
  bind(bindFunction) {
    const device = this.config.device;
    bindFunction(device, 'start', this.pointerDown.bind(this));
    if (this.config.pointerCapture) {
      bindFunction(device, 'change', this.pointerMove.bind(this));
      bindFunction(device, 'end', this.pointerUp.bind(this));
      bindFunction(device, 'cancel', this.pointerUp.bind(this));
      bindFunction('lostPointerCapture', '', this.pointerUp.bind(this));
    }
    if (this.config.keys) {
      bindFunction('key', 'down', this.keyDown.bind(this));
      bindFunction('key', 'up', this.keyUp.bind(this));
    }
    if (this.config.filterTaps) {
      bindFunction('click', '', this.pointerClick.bind(this), {
        capture: true,
        passive: false
      });
    }
  }
}
function persistEvent(event) {
  'persist' in event && typeof event.persist === 'function' && event.persist();
}

const isBrowser = typeof window !== 'undefined' && window.document && window.document.createElement;
function supportsTouchEvents() {
  return isBrowser && 'ontouchstart' in window;
}
function isTouchScreen() {
  return supportsTouchEvents() || isBrowser && window.navigator.maxTouchPoints > 1;
}
function supportsPointerEvents() {
  return isBrowser && 'onpointerdown' in window;
}
function supportsPointerLock() {
  return isBrowser && 'exitPointerLock' in window.document;
}
function supportsGestureEvents() {
  try {
    return 'constructor' in GestureEvent;
  } catch (e) {
    return false;
  }
}
const SUPPORT = {
  isBrowser,
  gesture: supportsGestureEvents(),
  touch: supportsTouchEvents(),
  touchscreen: isTouchScreen(),
  pointer: supportsPointerEvents(),
  pointerLock: supportsPointerLock()
};

const DEFAULT_PREVENT_SCROLL_DELAY = 250;
const DEFAULT_DRAG_DELAY = 180;
const DEFAULT_SWIPE_VELOCITY = 0.5;
const DEFAULT_SWIPE_DISTANCE = 50;
const DEFAULT_SWIPE_DURATION = 250;
const DEFAULT_KEYBOARD_DISPLACEMENT = 10;
const DEFAULT_DRAG_AXIS_THRESHOLD = {
  mouse: 0,
  touch: 0,
  pen: 8
};
const dragConfigResolver = _objectSpread2(_objectSpread2({}, coordinatesConfigResolver), {}, {
  device(_v, _k, {
    pointer: {
      touch = false,
      lock = false,
      mouse = false
    } = {}
  }) {
    this.pointerLock = lock && SUPPORT.pointerLock;
    if (SUPPORT.touch && touch) return 'touch';
    if (this.pointerLock) return 'mouse';
    if (SUPPORT.pointer && !mouse) return 'pointer';
    if (SUPPORT.touch) return 'touch';
    return 'mouse';
  },
  preventScrollAxis(value, _k, {
    preventScroll
  }) {
    this.preventScrollDelay = typeof preventScroll === 'number' ? preventScroll : preventScroll || preventScroll === undefined && value ? DEFAULT_PREVENT_SCROLL_DELAY : undefined;
    if (!SUPPORT.touchscreen || preventScroll === false) return undefined;
    return value ? value : preventScroll !== undefined ? 'y' : undefined;
  },
  pointerCapture(_v, _k, {
    pointer: {
      capture = true,
      buttons = 1,
      keys = true
    } = {}
  }) {
    this.pointerButtons = buttons;
    this.keys = keys;
    return !this.pointerLock && this.device === 'pointer' && capture;
  },
  threshold(value, _k, {
    filterTaps = false,
    tapsThreshold = 3,
    axis = undefined
  }) {
    const threshold = maths.V.toVector(value, filterTaps ? tapsThreshold : axis ? 1 : 0);
    this.filterTaps = filterTaps;
    this.tapsThreshold = tapsThreshold;
    return threshold;
  },
  swipe({
    velocity = DEFAULT_SWIPE_VELOCITY,
    distance = DEFAULT_SWIPE_DISTANCE,
    duration = DEFAULT_SWIPE_DURATION
  } = {}) {
    return {
      velocity: this.transform(maths.V.toVector(velocity)),
      distance: this.transform(maths.V.toVector(distance)),
      duration
    };
  },
  delay(value = 0) {
    switch (value) {
      case true:
        return DEFAULT_DRAG_DELAY;
      case false:
        return 0;
      default:
        return value;
    }
  },
  axisThreshold(value) {
    if (!value) return DEFAULT_DRAG_AXIS_THRESHOLD;
    return _objectSpread2(_objectSpread2({}, DEFAULT_DRAG_AXIS_THRESHOLD), value);
  },
  keyboardDisplacement(value = DEFAULT_KEYBOARD_DISPLACEMENT) {
    return value;
  }
});

function clampStateInternalMovementToBounds(state) {
  const [ox, oy] = state.overflow;
  const [dx, dy] = state._delta;
  const [dirx, diry] = state._direction;
  if (ox < 0 && dx > 0 && dirx < 0 || ox > 0 && dx < 0 && dirx > 0) {
    state._movement[0] = state._movementBound[0];
  }
  if (oy < 0 && dy > 0 && diry < 0 || oy > 0 && dy < 0 && diry > 0) {
    state._movement[1] = state._movementBound[1];
  }
}

const SCALE_ANGLE_RATIO_INTENT_DEG = 30;
const PINCH_WHEEL_RATIO = 100;
class PinchEngine extends Engine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "ingKey", 'pinching');
    _defineProperty(this, "aliasKey", 'da');
  }
  init() {
    this.state.offset = [1, 0];
    this.state.lastOffset = [1, 0];
    this.state._pointerEvents = new Map();
  }
  reset() {
    super.reset();
    const state = this.state;
    state._touchIds = [];
    state.canceled = false;
    state.cancel = this.cancel.bind(this);
    state.turns = 0;
  }
  computeOffset() {
    const {
      type,
      movement,
      lastOffset
    } = this.state;
    if (type === 'wheel') {
      this.state.offset = maths.V.add(movement, lastOffset);
    } else {
      this.state.offset = [(1 + movement[0]) * lastOffset[0], movement[1] + lastOffset[1]];
    }
  }
  computeMovement() {
    const {
      offset,
      lastOffset
    } = this.state;
    this.state.movement = [offset[0] / lastOffset[0], offset[1] - lastOffset[1]];
  }
  axisIntent() {
    const state = this.state;
    const [_m0, _m1] = state._movement;
    if (!state.axis) {
      const axisMovementDifference = Math.abs(_m0) * SCALE_ANGLE_RATIO_INTENT_DEG - Math.abs(_m1);
      if (axisMovementDifference < 0) state.axis = 'angle';else if (axisMovementDifference > 0) state.axis = 'scale';
    }
  }
  restrictToAxis(v) {
    if (this.config.lockDirection) {
      if (this.state.axis === 'scale') v[1] = 0;else if (this.state.axis === 'angle') v[0] = 0;
    }
  }
  cancel() {
    const state = this.state;
    if (state.canceled) return;
    setTimeout(() => {
      state.canceled = true;
      state._active = false;
      this.compute();
      this.emit();
    }, 0);
  }
  touchStart(event) {
    this.ctrl.setEventIds(event);
    const state = this.state;
    const ctrlTouchIds = this.ctrl.touchIds;
    if (state._active) {
      if (state._touchIds.every(id => ctrlTouchIds.has(id))) return;
    }
    if (ctrlTouchIds.size < 2) return;
    this.start(event);
    state._touchIds = Array.from(ctrlTouchIds).slice(0, 2);
    const payload = touchDistanceAngle(event, state._touchIds);
    if (!payload) return;
    this.pinchStart(event, payload);
  }
  pointerStart(event) {
    if (event.buttons != null && event.buttons % 2 !== 1) return;
    this.ctrl.setEventIds(event);
    event.target.setPointerCapture(event.pointerId);
    const state = this.state;
    const _pointerEvents = state._pointerEvents;
    const ctrlPointerIds = this.ctrl.pointerIds;
    if (state._active) {
      if (Array.from(_pointerEvents.keys()).every(id => ctrlPointerIds.has(id))) return;
    }
    if (_pointerEvents.size < 2) {
      _pointerEvents.set(event.pointerId, event);
    }
    if (state._pointerEvents.size < 2) return;
    this.start(event);
    const payload = distanceAngle(...Array.from(_pointerEvents.values()));
    if (!payload) return;
    this.pinchStart(event, payload);
  }
  pinchStart(event, payload) {
    const state = this.state;
    state.origin = payload.origin;
    this.computeValues([payload.distance, payload.angle]);
    this.computeInitial();
    this.compute(event);
    this.emit();
  }
  touchMove(event) {
    if (!this.state._active) return;
    const payload = touchDistanceAngle(event, this.state._touchIds);
    if (!payload) return;
    this.pinchMove(event, payload);
  }
  pointerMove(event) {
    const _pointerEvents = this.state._pointerEvents;
    if (_pointerEvents.has(event.pointerId)) {
      _pointerEvents.set(event.pointerId, event);
    }
    if (!this.state._active) return;
    const payload = distanceAngle(...Array.from(_pointerEvents.values()));
    if (!payload) return;
    this.pinchMove(event, payload);
  }
  pinchMove(event, payload) {
    const state = this.state;
    const prev_a = state._values[1];
    const delta_a = payload.angle - prev_a;
    let delta_turns = 0;
    if (Math.abs(delta_a) > 270) delta_turns += Math.sign(delta_a);
    this.computeValues([payload.distance, payload.angle - 360 * delta_turns]);
    state.origin = payload.origin;
    state.turns = delta_turns;
    state._movement = [state._values[0] / state._initial[0] - 1, state._values[1] - state._initial[1]];
    this.compute(event);
    this.emit();
  }
  touchEnd(event) {
    this.ctrl.setEventIds(event);
    if (!this.state._active) return;
    if (this.state._touchIds.some(id => !this.ctrl.touchIds.has(id))) {
      this.state._active = false;
      this.compute(event);
      this.emit();
    }
  }
  pointerEnd(event) {
    const state = this.state;
    this.ctrl.setEventIds(event);
    try {
      event.target.releasePointerCapture(event.pointerId);
    } catch (_unused) {}
    if (state._pointerEvents.has(event.pointerId)) {
      state._pointerEvents.delete(event.pointerId);
    }
    if (!state._active) return;
    if (state._pointerEvents.size < 2) {
      state._active = false;
      this.compute(event);
      this.emit();
    }
  }
  gestureStart(event) {
    if (event.cancelable) event.preventDefault();
    const state = this.state;
    if (state._active) return;
    this.start(event);
    this.computeValues([event.scale, event.rotation]);
    state.origin = [event.clientX, event.clientY];
    this.compute(event);
    this.emit();
  }
  gestureMove(event) {
    if (event.cancelable) event.preventDefault();
    if (!this.state._active) return;
    const state = this.state;
    this.computeValues([event.scale, event.rotation]);
    state.origin = [event.clientX, event.clientY];
    const _previousMovement = state._movement;
    state._movement = [event.scale - 1, event.rotation];
    state._delta = maths.V.sub(state._movement, _previousMovement);
    this.compute(event);
    this.emit();
  }
  gestureEnd(event) {
    if (!this.state._active) return;
    this.state._active = false;
    this.compute(event);
    this.emit();
  }
  wheel(event) {
    const modifierKey = this.config.modifierKey;
    if (modifierKey && (Array.isArray(modifierKey) ? !modifierKey.find(k => event[k]) : !event[modifierKey])) return;
    if (!this.state._active) this.wheelStart(event);else this.wheelChange(event);
    this.timeoutStore.add('wheelEnd', this.wheelEnd.bind(this));
  }
  wheelStart(event) {
    this.start(event);
    this.wheelChange(event);
  }
  wheelChange(event) {
    const isR3f = ('uv' in event);
    if (!isR3f) {
      if (event.cancelable) {
        event.preventDefault();
      }
    }
    const state = this.state;
    state._delta = [-wheelValues(event)[1] / PINCH_WHEEL_RATIO * state.offset[0], 0];
    maths.V.addTo(state._movement, state._delta);
    clampStateInternalMovementToBounds(state);
    this.state.origin = [event.clientX, event.clientY];
    this.compute(event);
    this.emit();
  }
  wheelEnd() {
    if (!this.state._active) return;
    this.state._active = false;
    this.compute();
    this.emit();
  }
  bind(bindFunction) {
    const device = this.config.device;
    if (!!device) {
      bindFunction(device, 'start', this[device + 'Start'].bind(this));
      bindFunction(device, 'change', this[device + 'Move'].bind(this));
      bindFunction(device, 'end', this[device + 'End'].bind(this));
      bindFunction(device, 'cancel', this[device + 'End'].bind(this));
      bindFunction('lostPointerCapture', '', this[device + 'End'].bind(this));
    }
    if (this.config.pinchOnWheel) {
      bindFunction('wheel', '', this.wheel.bind(this), {
        passive: false
      });
    }
  }
}

const pinchConfigResolver = _objectSpread2(_objectSpread2({}, commonConfigResolver), {}, {
  device(_v, _k, {
    shared,
    pointer: {
      touch = false
    } = {}
  }) {
    const sharedConfig = shared;
    if (sharedConfig.target && !SUPPORT.touch && SUPPORT.gesture) return 'gesture';
    if (SUPPORT.touch && touch) return 'touch';
    if (SUPPORT.touchscreen) {
      if (SUPPORT.pointer) return 'pointer';
      if (SUPPORT.touch) return 'touch';
    }
  },
  bounds(_v, _k, {
    scaleBounds = {},
    angleBounds = {}
  }) {
    const _scaleBounds = state => {
      const D = assignDefault(call(scaleBounds, state), {
        min: -Infinity,
        max: Infinity
      });
      return [D.min, D.max];
    };
    const _angleBounds = state => {
      const A = assignDefault(call(angleBounds, state), {
        min: -Infinity,
        max: Infinity
      });
      return [A.min, A.max];
    };
    if (typeof scaleBounds !== 'function' && typeof angleBounds !== 'function') return [_scaleBounds(), _angleBounds()];
    return state => [_scaleBounds(state), _angleBounds(state)];
  },
  threshold(value, _k, config) {
    this.lockDirection = config.axis === 'lock';
    const threshold = maths.V.toVector(value, this.lockDirection ? [0.1, 3] : 0);
    return threshold;
  },
  modifierKey(value) {
    if (value === undefined) return 'ctrlKey';
    return value;
  },
  pinchOnWheel(value = true) {
    return value;
  }
});

class MoveEngine extends CoordinatesEngine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "ingKey", 'moving');
  }
  move(event) {
    if (this.config.mouseOnly && event.pointerType !== 'mouse') return;
    if (!this.state._active) this.moveStart(event);else this.moveChange(event);
    this.timeoutStore.add('moveEnd', this.moveEnd.bind(this));
  }
  moveStart(event) {
    this.start(event);
    this.computeValues(pointerValues(event));
    this.compute(event);
    this.computeInitial();
    this.emit();
  }
  moveChange(event) {
    if (!this.state._active) return;
    const values = pointerValues(event);
    const state = this.state;
    state._delta = maths.V.sub(values, state._values);
    maths.V.addTo(state._movement, state._delta);
    this.computeValues(values);
    this.compute(event);
    this.emit();
  }
  moveEnd(event) {
    if (!this.state._active) return;
    this.state._active = false;
    this.compute(event);
    this.emit();
  }
  bind(bindFunction) {
    bindFunction('pointer', 'change', this.move.bind(this));
    bindFunction('pointer', 'leave', this.moveEnd.bind(this));
  }
}

const moveConfigResolver = _objectSpread2(_objectSpread2({}, coordinatesConfigResolver), {}, {
  mouseOnly: (value = true) => value
});

class ScrollEngine extends CoordinatesEngine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "ingKey", 'scrolling');
  }
  scroll(event) {
    if (!this.state._active) this.start(event);
    this.scrollChange(event);
    this.timeoutStore.add('scrollEnd', this.scrollEnd.bind(this));
  }
  scrollChange(event) {
    if (event.cancelable) event.preventDefault();
    const state = this.state;
    const values = scrollValues(event);
    state._delta = maths.V.sub(values, state._values);
    maths.V.addTo(state._movement, state._delta);
    this.computeValues(values);
    this.compute(event);
    this.emit();
  }
  scrollEnd() {
    if (!this.state._active) return;
    this.state._active = false;
    this.compute();
    this.emit();
  }
  bind(bindFunction) {
    bindFunction('scroll', '', this.scroll.bind(this));
  }
}

const scrollConfigResolver = coordinatesConfigResolver;

class WheelEngine extends CoordinatesEngine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "ingKey", 'wheeling');
  }
  wheel(event) {
    if (!this.state._active) this.start(event);
    this.wheelChange(event);
    this.timeoutStore.add('wheelEnd', this.wheelEnd.bind(this));
  }
  wheelChange(event) {
    const state = this.state;
    state._delta = wheelValues(event);
    maths.V.addTo(state._movement, state._delta);
    clampStateInternalMovementToBounds(state);
    this.compute(event);
    this.emit();
  }
  wheelEnd() {
    if (!this.state._active) return;
    this.state._active = false;
    this.compute();
    this.emit();
  }
  bind(bindFunction) {
    bindFunction('wheel', '', this.wheel.bind(this));
  }
}

const wheelConfigResolver = coordinatesConfigResolver;

class HoverEngine extends CoordinatesEngine {
  constructor(...args) {
    super(...args);
    _defineProperty(this, "ingKey", 'hovering');
  }
  enter(event) {
    if (this.config.mouseOnly && event.pointerType !== 'mouse') return;
    this.start(event);
    this.computeValues(pointerValues(event));
    this.compute(event);
    this.emit();
  }
  leave(event) {
    if (this.config.mouseOnly && event.pointerType !== 'mouse') return;
    const state = this.state;
    if (!state._active) return;
    state._active = false;
    const values = pointerValues(event);
    state._movement = state._delta = maths.V.sub(values, state._values);
    this.computeValues(values);
    this.compute(event);
    state.delta = state.movement;
    this.emit();
  }
  bind(bindFunction) {
    bindFunction('pointer', 'enter', this.enter.bind(this));
    bindFunction('pointer', 'leave', this.leave.bind(this));
  }
}

const hoverConfigResolver = _objectSpread2(_objectSpread2({}, coordinatesConfigResolver), {}, {
  mouseOnly: (value = true) => value
});

const EngineMap = new Map();
const ConfigResolverMap = new Map();
function registerAction(action) {
  EngineMap.set(action.key, action.engine);
  ConfigResolverMap.set(action.key, action.resolver);
}
const dragAction = {
  key: 'drag',
  engine: DragEngine,
  resolver: dragConfigResolver
};
const hoverAction = {
  key: 'hover',
  engine: HoverEngine,
  resolver: hoverConfigResolver
};
const moveAction = {
  key: 'move',
  engine: MoveEngine,
  resolver: moveConfigResolver
};
const pinchAction = {
  key: 'pinch',
  engine: PinchEngine,
  resolver: pinchConfigResolver
};
const scrollAction = {
  key: 'scroll',
  engine: ScrollEngine,
  resolver: scrollConfigResolver
};
const wheelAction = {
  key: 'wheel',
  engine: WheelEngine,
  resolver: wheelConfigResolver
};

exports.ConfigResolverMap = ConfigResolverMap;
exports.EngineMap = EngineMap;
exports.SUPPORT = SUPPORT;
exports._defineProperty = _defineProperty;
exports._objectSpread2 = _objectSpread2;
exports.chain = chain;
exports.dragAction = dragAction;
exports.hoverAction = hoverAction;
exports.isTouch = isTouch;
exports.moveAction = moveAction;
exports.parseProp = parseProp;
exports.pinchAction = pinchAction;
exports.registerAction = registerAction;
exports.scrollAction = scrollAction;
exports.toDomEventType = toDomEventType;
exports.toHandlerProp = toHandlerProp;
exports.touchIds = touchIds;
exports.wheelAction = wheelAction;
