_createPadding.js•1.15 kB
var baseRepeat = require('./_baseRepeat'),
baseToString = require('./_baseToString'),
castSlice = require('./_castSlice'),
hasUnicode = require('./_hasUnicode'),
stringSize = require('./_stringSize'),
stringToArray = require('./_stringToArray');
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeCeil = Math.ceil;
/**
* Creates the padding for `string` based on `length`. The `chars` string
* is truncated if the number of characters exceeds `length`.
*
* @private
* @param {number} length The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padding for `string`.
*/
function createPadding(length, chars) {
chars = chars === undefined ? ' ' : baseToString(chars);
var charsLength = chars.length;
if (charsLength < 2) {
return charsLength ? baseRepeat(chars, length) : chars;
}
var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
return hasUnicode(chars)
? castSlice(stringToArray(result), 0, length).join('')
: result.slice(0, length);
}
module.exports = createPadding;