forked from mozilla-b2g/gaia
/
input_cancel_button.js
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/
input_cancel_button.js
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'use strict';
var InputCancelButton = (function inputCancelButton() {
var selector = 'input[data-cancelable]';
window.addEventListener('load', function init() {
initCurrentInputs();
initMutationsListener();
initInputListener();
});
// Checking current inputs and addingListeners to them
var initCurrentInputs = function initCurrentInputs() {
var inputs = document.querySelectorAll(selector);
for (var i = 0; i < inputs.length; i++) {
listenForCheck(inputs[i]);
}
};
// Waiting for new input additions to the DOM
var initMutationsListener = function initMutationsListener() {
document.addEventListener('animationstart', function(event) {
if (event.animationName == 'nodeInserted') {
listenForCheck(event.target);
}
}, false);
};
// Listening when someone is typing
var initInputListener = function initInputListener() {
document.addEventListener('input', function input(event) {
var target = event.target;
if (target.tagName != 'INPUT' || !('cancelable' in target.dataset))
return;
checkAddingButton(target);
});
};
var listenForCheck = function listenForCheck(input) {
input.addEventListener('focus', function onFocus(event) {
checkAddingButton(event.target);
input.removeEventListener('focus', onFocus);
});
};
var checkAddingButton = function checkAddingButton(input) {
input.value.length > 0 ? addCancelButton(input) : removeCancelButton(input);
};
var addCancelButton = function addCancelButton(input) {
if (input.classList.contains('cancel-button')) {
return;
}
var parentElement = input.parentNode;
input.classList.add('cancel-button');
var clearButton = parentElement.querySelector('[type=reset]');
clearButton.classList.remove("hide");
clearButton.addEventListener('mousedown', function removeText() {
input.value = '';
var event = new CustomEvent('cancelInput');
document.dispatchEvent(event);
});
input.addEventListener('blur', function onBlur() {
removeCancelButton(input);
});
input.addEventListener('focus', function onFocus() {
checkAddingButton(input);
});
};
var removeCancelButton = function removeCancelButton(input) {
if (!input.classList.contains('cancel-button')) {
return;
}
var parentElement = input.parentNode;
input.classList.remove('cancel-button');
parentElement.querySelector('[type=reset]').classList.add("hide");
};
}());