File: //proc/self/cwd/wp-content/plugins/wpforms-lite/assets/js/text-limit.js
'use strict';
( function() {
/**
* Predefine hint text to display.
*
* @since 1.5.6
* @since 1.6.4 Added a new macros - {remaining}.
*
* @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 ).replace( '{remaining}', limit - count );
}
/**
* 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
);
};
}
/**
* Count words in the string.
*
* @since 1.6.2
*
* @param {string} string String value.
*
* @returns {number} Words count.
*/
function countWords( string ) {
if ( typeof string !== 'string' ) {
return 0;
}
if ( ! string.length ) {
return 0;
}
[
/([A-Z]+),([A-Z]+)/gi,
/([0-9]+),([A-Z]+)/gi,
/([A-Z]+),([0-9]+)/gi,
].forEach( function( pattern ) {
string = string.replace( pattern, '$1, $2' );
} );
return string.split( /\s+/ ).length;
}
/**
* 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 value = this.value.trim(),
words = countWords( value );
hint.textContent = renderHint(
window.wpforms_settings.val_limit_words,
words,
limit
);
// We should prevent the keys: Enter, Space, Comma.
if ( [ 13, 32, 188 ].indexOf( e.keyCode ) > -1 && words >= limit ) {
e.preventDefault();
}
};
}
/**
* 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 characters limit.
*
* @since 1.6.7.1
*
* @param {number} limit Max allowed number of characters.
*
* @returns {Function} Event handler.
*/
function pasteText( limit ) {
return function( e ) {
e.preventDefault();
var pastedText = getPastedText( e ),
newPosition = this.selectionStart + pastedText.length,
newText = this.value.substring( 0, this.selectionStart ) + pastedText + this.value.substring( this.selectionStart );
this.value = newText.substring( 0, limit );
this.setSelectionRange( newPosition, newPosition );
};
}
/**
* Limit string length to a certain number of words, preserving line breaks.
*
* @since 1.6.8
*
* @param {string} text Text.
* @param {number} limit Max allowed number of words.
*
* @returns {string} Text with the limited number of words.
*/
function limitWords( text, limit ) {
var separators,
newTextArray,
result = '';
// Regular expression pattern: match any space character.
var regEx = /\s+/g;
// Store separators for further join.
separators = text.trim().match( regEx ) || [];
// Split the new text by regular expression.
newTextArray = text.split( regEx );
// Limit the number of words.
newTextArray.splice( limit, newTextArray.length );
// Join the words together using stored separators.
for ( var i = 0; i < newTextArray.length; i++ ) {
result += newTextArray[ i ] + ( separators[ i ] || '' );
}
return result.trim();
}
/**
* 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 ),
newPosition = this.selectionStart + pastedText.length,
newText = this.value.substring( 0, this.selectionStart ) + pastedText + this.value.substring( this.selectionStart );
this.value = limitWords( newText, limit );
this.setSelectionRange( newPosition, newPosition );
};
}
/**
* 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 );
e.addEventListener( 'paste', pasteText( limit ) );
}
);
arrFrom( document.querySelectorAll( '.wpforms-limit-words-enabled' ) )
.map(
function( e ) {
var limit = parseInt( e.dataset.textLimit, 10 ) || 0;
e.value = limitWords( e.value, limit );
var hint = createHint(
e.dataset.formId,
e.dataset.fieldId,
renderHint(
window.wpforms_settings.val_limit_words,
countWords( e.value.trim() ),
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();
}
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