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/* global everest_forms_text_limit_params */
jQuery(function() {
'use strict';
// everest_forms_text_limit_params is required to continue, ensure the object exists.
if (typeof everest_forms_text_limit_params === 'undefined') {
return false;
}
/**
* TextLimitHandler class.
*/
var TextLimitHandler = function() {
var self = this;
// Limit by characters.
Array.prototype.slice.call(document.querySelectorAll('.everest-forms-limit-characters-enabled')).map(function(event) {
var limit = parseInt(event.dataset.textLimit, 10) || 0;
event.value = event.value.slice(0, limit);
var hint = self.createHint(
event.dataset.formId,
event.dataset.fieldId,
self.renderHint(
everest_forms_text_limit_params.i18n_messages_limit_characters,
event.value.length,
limit
)
);
event.parentNode.appendChild(hint);
// Event listener.
event.addEventListener('keyup', self.checkCharacters(hint, limit));
event.addEventListener('keydown', self.checkCharacters(hint, limit));
});
// Limit by words count.
Array.prototype.slice.call(document.querySelectorAll('.everest-forms-limit-words-enabled')).map(function(event) {
var limit = parseInt(event.dataset.textLimit, 10) || 0;
event.value = event.value.trim().split(/\s+/).slice(0, limit).join(' ');
var hint = self.createHint(
event.dataset.formId,
event.dataset.fieldId,
self.renderHint(
everest_forms_text_limit_params.i18n_messages_limit_words,
event.value.trim().split(/\s+/).length,
limit
)
);
event.parentNode.appendChild(hint);
// Event listener.
event.addEventListener('keyup', self.checkWords(hint, limit));
event.addEventListener('keydown', self.checkWords(hint, limit));
event.addEventListener('paste', self.pasteWords(limit));
});
};
/**
* Predefine hint text to display.
*
* @since 1.6.0
*
* @param {string} hintText Hint text.
* @param {number} count Current count.
* @param {number} limit Limit to.
*
* @returns {string} Predefined hint text.
*/
TextLimitHandler.prototype.renderHint = function(hintText, count, limit) {
return hintText.replace('{count}', count).replace('{limit}', limit);
}
/**
* Create HTMLElement hint element with text.
*
* @since 1.6.0
*
* @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.
*/
TextLimitHandler.prototype.createHint = function(formId, fieldId, text) {
var hint = document.createElement('div');
hint.classList.add('everest-forms-field-limit-text');
hint.id = 'everest-forms-field-limit-text-' + formId + '-' + fieldId;
hint.textContent = text;
return hint;
}
/**
* Keyup/Keydown event higher order function for characters limit.
*
* @since 1.6.0
*
* @param {object} hint HTMLElement hint element.
* @param {number} limit Max allowed number of characters.
*
* @returns {Function} Handler function.
*/
TextLimitHandler.prototype.checkCharacters = function(hint, limit) {
return (event) => {
hint.textContent = this.renderHint(
everest_forms_text_limit_params.i18n_messages_limit_characters,
event.target.value.length,
limit
);
};
}
/**
* Keyup/Keydown event higher order function for words limit.
*
* @since 1.6.0
*
* @param {object} hint HTMLElement hint element.
* @param {number} limit Max allowed number of words.
*
* @returns {Function} Handler function.
*/
TextLimitHandler.prototype.checkWords = function(hint, limit) {
return (event) => {
var words = event.target.value.trim().split(/\s+/);
if (event.keyCode === 32 && words.length >= limit) {
event.preventDefault();
}
hint.textContent = this.renderHint(
everest_forms_text_limit_params.i18n_messages_limit_words,
words.length,
limit
);
};
}
/**
* Get passed text from clipboard.
*
* @since 1.6.0
*
* @param {ClipboardEvent} e Clipboard event.
*
* @returns {string} Text from clipboard.
*/
TextLimitHandler.prototype.getPastedText = function(event) {
if (window.clipboardData && window.clipboardData.getData) { // IE
return window.clipboardData.getData('Text');
} else if (event.clipboardData && event.clipboardData.getData) {
return event.clipboardData.getData('text/plain');
}
}
/**
* Paste event higher order function for words limit.
*
* @since 1.6.0
*
* @param {number} limit Max allowed number of words.
*
* @returns {Function} Event handler.
*/
TextLimitHandler.prototype.pasteWords = function(limit) {
return (event) => {
event.preventDefault();
var pastedText = this.getPastedText(event).trim().split(/\s+/);
pastedText.splice(limit, pastedText.length);
event.target.value = pastedText.join(' ');
};
}
/**
* Init TextLimitHandler.
*/
new TextLimitHandler();
});