Function normalizeSymbolArray

src/util/decal.ts:314–343

* Convert symbol array into normalized array * * @param {string | (string | string[])[]} symbol symbol input * @return {string[][]} normolized symbol array

(symbol: string | (string | string[])[])

 * @return {string[][]} normolized symbol array
 */
function normalizeSymbolArray(symbol: string | (string | string[])[]): string[][] {
    if (!symbol || (symbol as string[]).length === 0) {
        return [['rect']];
    }
    if (isString(symbol)) {
        return [[symbol]];
    }

    let isAllString = true;
    for (let i = 0; i < symbol.length; ++i) {
        if (!isString(symbol[i])) {
            isAllString = false;
            break;
        }
    }
    if (isAllString) {
        return normalizeSymbolArray([symbol as string[]]);
    }

    const result: string[][] = [];
    for (let i = 0; i < symbol.length; ++i) {
        if (isString(symbol[i])) {
            result.push([symbol[i] as string]);
        }
        else {
            result.push(symbol[i] as string[]);
        }
    }
    return result;
}

/**
 * Convert dash input into dashArray