ui/lib/shared/addon/components/textarea-autogrow/component.js

85 lines
2.1 KiB
JavaScript

import TextArea from '@ember/component/text-area';
import { inject as service } from '@ember/service'
import { run } from '@ember/runloop'
import { computed, get, observer } from '@ember/object';
import { isGecko } from 'ui/utils/platform';
import IntlPlaceholder from 'shared/mixins/intl-placeholder';
import $ from 'jquery';
export default TextArea.extend(IntlPlaceholder, {
intl: service(),
minHeight: 0,
curHeight: null,
maxHeight: 200,
tagName: 'textarea',
classNames: ['no-resize', 'no-ease'],
attributeBindings: ['spellcheck'],
classNameBindings: ['bg'],
didInsertElement() {
run.later(this, 'initHeights', 100);
},
changed: observer('value', function() {
run.debounce(this, 'autoSize', 100);
}),
bg: computed('disabled', function() {
if ( get(this, 'disabled') ) {
return 'bg-disabled'
}
return '';
}),
isSmall: computed('isDestroyed', 'isDestroying', function() {
if ( this.isDestroyed || this.isDestroying ) {
return;
}
return $().hasClass('input-sm');
}),
initHeights() {
if ( this.isDestroyed || this.isDestroying ) {
return;
}
if ( this.get('minHeight') === 0 ) {
this.set('minHeight', ( this.get('isSmall') ? 31 : 36));
}
run.next(() => {
this.autoSize();
});
$().on('paste', () => {
run.later(this, 'autoSize', 100);
});
},
autoSize() {
if ( this.isDestroyed || this.isDestroying ) {
return;
}
let el = this.element;
let $el = $(el); // eslint-disable-line
run(() => {
$el.css('height', '1px');
let border = parseInt($el.css('borderTopWidth'), 10) || 0 + parseInt($el.css('borderBottomWidth'), 10) || 0;
let magic = (this.get('isSmall') ? -2 : 0) + ( isGecko ? 1 : 2); // Sigh, but it's wrong without magic fudge
let neu = Math.max(this.get('minHeight'), Math.min(el.scrollHeight + border + magic, this.get('maxHeight')));
$el.css('overflowY', (el.scrollHeight > neu ? 'auto' : 'hidden'));
$el.css('height', `${ neu }px`);
this.set('curHeight', neu);
});
}
});