lisn.js/dist/cjs/utils/gesture.cjs

Simply handle user gestures and actions. Includes widgets.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.isValidIntentList = exports.isValidIntent = exports.isValidInputDeviceList = exports.isValidInputDevice = exports.addDeltaZ = exports.INTENTS = exports.DEVICES = void 0;
var MC = _interopRequireWildcard(require("../globals/minification-constants.cjs"));
var MH = _interopRequireWildcard(require("../globals/minification-helpers.cjs"));
var _validation = require("./validation.cjs");
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function (e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (const t in e) "default" !== t && {}.hasOwnProperty.call(e, t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, t)) && (i.get || i.set) ? o(f, t, i) : f[t] = e[t]); return f; })(e, t); }
/**
 * @module Utils
 */

/**
 * `deltaX` and `deltaY` together specify the precise direction in the XY plane
 * of the move if relevant (i.e. other than zoom intent). The direction
 * specifies the effective X ("left"/"right"), Y ("up"/"down") or Z ("in"/"out")
 * direction, or "none"/"ambiguous".
 *
 * `deltaZ` specifies relative zoom in or out for zoom intents.
 * For zoom in, deltaZ is always > 1, and for zoom out it is < 1.
 * For non-zoom events it is 1.
 *
 * For zoom intents, `direction` would be either in, out or none.
 * For other intents, it would be up, down, left, right, none or ambiguous.
 *
 * For important notes on the delta values see
 * - {@link Utils.getKeyGestureFragment | getKeyGestureFragment}
 * - {@link Utils.getTouchGestureFragment | getTouchGestureFragment}
 * - {@link Utils.getWheelGestureFragment | getWheelGestureFragment}
 *
 * @category Gestures
 */

/**
 * Returns true if the given string is a valid gesture device.
 *
 * @category Validation
 */
const isValidInputDevice = device => MH.includes(DEVICES, device);

/**
 * Returns true if the given string is a valid gesture intent.
 *
 * @category Validation
 */
exports.isValidInputDevice = isValidInputDevice;
const isValidIntent = intent => MH.includes(INTENTS, intent);

/**
 * Returns true if the given string or array is a list of valid gesture
 * devices.
 *
 * @category Validation
 */
exports.isValidIntent = isValidIntent;
const isValidInputDeviceList = devices => (0, _validation.isValidStrList)(devices, isValidInputDevice, false);

/**
 * Returns true if the given string or array is a list of valid gesture
 * intents.
 *
 * @category Validation
 */
exports.isValidInputDeviceList = isValidInputDeviceList;
const isValidIntentList = intents => (0, _validation.isValidStrList)(intents, isValidIntent, false);

/**
 * @ignore
 * @internal
 */
exports.isValidIntentList = isValidIntentList;
const addDeltaZ = (current, increment) => MH.max(MIN_DELTA_Z, current * increment);

/**
 * @ignore
 * @internal
 */
exports.addDeltaZ = addDeltaZ;
const DEVICES = exports.DEVICES = [MC.S_KEY, MC.S_POINTER, MC.S_TOUCH, MC.S_WHEEL];

/**
 * @ignore
 * @internal
 */
const INTENTS = exports.INTENTS = [MC.S_SCROLL, MC.S_ZOOM, MC.S_DRAG, MC.S_UNKNOWN];

// Do not allow zooming out more than this value
const MIN_DELTA_Z = 0.1;
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