util-helpers/esm/calculateCursorPosition.js

一个基于业务场景的工具方法库

import { toString, isArray } from 'ut2';

function calculateCursorPosition(prevPos, prevCtrlValue, rawValue, ctrlValue, options) {
    if (options === void 0) { options = {}; }
    var _a = options.placeholderChar, placeholderChar = _a === void 0 ? ' ' : _a, _b = options.maskReg, maskReg = _b === void 0 ? /\D/g : _b, type = options.type;
    var realCtrlValue = toString(prevCtrlValue);
    var realRawValue = toString(rawValue);
    var placeholderChars = isArray(placeholderChar) ? placeholderChar : [placeholderChar];
    var editLength = realRawValue.length - realCtrlValue.length;
    var isAddition = editLength > 0;
    var pos = prevPos;
    if (isAddition) {
        var additionStr = realRawValue.substring(pos - editLength, pos);
        var ctrlCharCount = additionStr.replace(maskReg, '').length;
        pos -= editLength - ctrlCharCount;
        var placeholderCharCount = 0;
        while (ctrlCharCount > 0) {
            if (placeholderChars.indexOf(ctrlValue.charAt(pos - ctrlCharCount + placeholderCharCount)) !== -1) {
                placeholderCharCount++;
            }
            else {
                ctrlCharCount--;
            }
        }
        pos += placeholderCharCount;
    }
    if ((type === 'mobile' && (pos === 4 || pos === 9)) || (type === 'bankCard' && pos > 0 && pos % 5 === 0)) {
        pos -= 1;
    }
    return pos;
}

export { calculateCursorPosition as default };