@gdjiami/hooks/es/utils.js

react hooks for mygzb.com

import { __assign, __values } from "tslib";
export var TOUCH_SUPPROTED = 'TouchEvent' in window;
export var GestureCoordinateKeys = [
    'clientX',
    'clientY',
    'pageX',
    'pageY',
    'screenX',
    'screenY',
];
export function isMouseEvent(evt) {
    if (evt.type.startsWith('mouse')) {
        return true;
    }
    return false;
}
export function pickProperties(obj, keys) {
    var e_1, _a;
    var newobj = {};
    try {
        for (var keys_1 = __values(keys), keys_1_1 = keys_1.next(); !keys_1_1.done; keys_1_1 = keys_1.next()) {
            var key = keys_1_1.value;
            newobj[key] = obj[key];
        }
    }
    catch (e_1_1) { e_1 = { error: e_1_1 }; }
    finally {
        try {
            if (keys_1_1 && !keys_1_1.done && (_a = keys_1.return)) _a.call(keys_1);
        }
        finally { if (e_1) throw e_1.error; }
    }
    return newobj;
}
/**
 * 获取MouseEvent或TouchEvent中的坐标
 * @param evt
 */
export function extraPosition(evt, id) {
    if (isMouseEvent(evt)) {
        return pickProperties(evt, GestureCoordinateKeys);
    }
    var touch;
    if (id) {
        for (var i = 0; i < evt.touches.length; i++) {
            if (evt.touches[i].identifier === id) {
                touch = evt.touches[i];
                break;
            }
        }
        if (touch == null) {
            return;
        }
    }
    else {
        touch = evt.targetTouches[0];
    }
    return __assign(__assign({}, pickProperties(touch, GestureCoordinateKeys)), { id: touch.identifier });
}
/**
 * 获取多点触摸
 */
export function extraPositions(evt) {
    if (isMouseEvent(evt)) {
        return [
            __assign({ id: 0 }, pickProperties(evt, GestureCoordinateKeys)),
        ];
    }
    return Array.prototype.map.call(evt.changedTouches, function (touch) {
        return __assign({ id: touch.identifier }, pickProperties(touch, GestureCoordinateKeys));
    });
}
export function clamp(num, lower, upper) {
    if (num === num) {
        if (upper !== undefined) {
            num = num <= upper ? num : upper;
        }
        if (lower !== undefined) {
            num = num >= lower ? num : lower;
        }
    }
    return num;
}
var uid = 0;
export function getUid() {
    return (uid = uid + (1 % (Number.MAX_SAFE_INTEGER - 1)));
}