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Editing: text-limit.js

'use strict';

( function() {

/**
	 * Predefine hint text to display.
	 *
	 * @since 1.5.6
	 *
	 * @param {string} hintText Hint text.
	 * @param {number} count Current count.
	 * @param {number} limit Limit to.
	 *
	 * @returns {string} Predefined hint text.
	 */
	function renderHint( hintText, count, limit ) {

return hintText.replace( '{count}', count ).replace( '{limit}', limit );
	}

/**
	 * Create HTMLElement hint element with text.
	 *
	 * @since 1.5.6
	 *
	 * @param {number} formId Form id.
	 * @param {number} fieldId Form field id.
	 * @param {string} text Text to hint element.
	 *
	 * @returns {object} HTMLElement hint element with text.
	 */
	function createHint( formId, fieldId, text ) {

var hint = document.createElement( 'div' );
		hint.classList.add( 'wpforms-field-limit-text' );
		hint.id = 'wpforms-field-limit-text-' + formId + '-' + fieldId;
		hint.textContent = text;

return hint;
	}

/**
	 * Keyup/Keydown event higher order function for characters limit.
	 *
	 * @since 1.5.6
	 *
	 * @param {object} hint HTMLElement hint element.
	 * @param {number} limit Max allowed number of characters.
	 *
	 * @returns {Function} Handler function.
	 */
	function checkCharacters( hint, limit ) {

return function( e ) {

hint.textContent = renderHint(
				window.wpforms_settings.val_limit_characters,
				this.value.length,
				limit
			);
		};
	}

/**
	 * Keyup/Keydown event higher order function for words limit.
	 *
	 * @since 1.5.6
	 *
	 * @param {object} hint HTMLElement hint element.
	 * @param {number} limit Max allowed number of characters.
	 *
	 * @returns {Function} Handler function.
	 */
	function checkWords( hint, limit ) {

return function( e ) {

var words = this.value.trim().split( /\s+/ );

if ( e.keyCode === 32 && words.length >= limit ) {
				e.preventDefault();
			}

hint.textContent = renderHint(
				window.wpforms_settings.val_limit_words,
				words.length,
				limit
			);
		};
	}

/**
	 * Get passed text from clipboard.
	 *
	 * @since 1.5.6
	 *
	 * @param {ClipboardEvent} e Clipboard event.
	 *
	 * @returns {string} Text from clipboard.
	 */
	function getPastedText( e ) {

if ( window.clipboardData && window.clipboardData.getData ) { // IE

return window.clipboardData.getData( 'Text' );
		} else if ( e.clipboardData && e.clipboardData.getData ) {

return e.clipboardData.getData( 'text/plain' );
		}
	}

/**
	 * Paste event higher order function for words limit.
	 *
	 * @since 1.5.6
	 *
	 * @param {number} limit Max allowed number of words.
	 *
	 * @returns {Function} Event handler.
	 */
	function pasteWords( limit ) {

return function( e ) {

e.preventDefault();
			var pastedText = getPastedText( e ).trim().split( /\s+/ );
			pastedText.splice( limit, pastedText.length );
			this.value = pastedText.join( ' ' );
		};
	}

/**
	 * Array.form polyfill.
	 *
	 * @since 1.5.6
	 *
	 * @param {object} el Iterator.
	 *
	 * @returns {object} Array.
	 */
	function arrFrom( el ) {

return [].slice.call( el );
	}

/**
	 * DOMContentLoaded handler.
	 *
	 * @since 1.5.6
	 */
	function ready() {

arrFrom( document.querySelectorAll( '.wpforms-limit-characters-enabled' ) )
			.map(
				function( e ) {

var limit = parseInt( e.dataset.textLimit, 10 ) || 0;
					e.value = e.value.slice( 0, limit );
					var hint = createHint(
						e.dataset.formId,
						e.dataset.fieldId,
						renderHint(
							window.wpforms_settings.val_limit_characters,
							e.value.length,
							limit
						)
					);
					var fn = checkCharacters( hint, limit );
					e.parentNode.appendChild( hint );

e.addEventListener( 'keydown', fn );
					e.addEventListener( 'keyup', fn );
				}
			);

arrFrom( document.querySelectorAll( '.wpforms-limit-words-enabled' ) )
			.map(
				function( e ) {

var limit = parseInt( e.dataset.textLimit, 10 ) || 0;
					e.value = e.value.trim().split( /\s+/ ).slice( 0, limit ).join( ' ' );
					var hint = createHint(
						e.dataset.formId,
						e.dataset.fieldId,
						renderHint(
							window.wpforms_settings.val_limit_words,
							e.value.trim().split( /\s+/ ).length,
							limit
						)
					);
					var fn = checkWords( hint, limit );
					e.parentNode.appendChild( hint );

e.addEventListener( 'keydown', fn );
					e.addEventListener( 'keyup', fn );
					e.addEventListener( 'paste', pasteWords( limit ) );
				}
			);
	}

if ( document.readyState === 'loading' ) {
		document.addEventListener( 'DOMContentLoaded', ready );
	} else {
		ready();
	}

}() );
;