77 lines
2.1 KiB
JavaScript
77 lines
2.1 KiB
JavaScript
import TextArea from '@ember/component/text-area';
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import TextInputMixin from 'ghost-admin/mixins/text-input';
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import classic from 'ember-classic-decorator';
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import {classNames} from '@ember-decorators/component';
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import {run} from '@ember/runloop';
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import {inject as service} from '@ember/service';
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@classic
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@classNames('gh-input')
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export default class GhTextarea extends TextArea.extend(TextInputMixin) {
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@service resizeDetector;
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autoExpand = false;
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didReceiveAttrs() {
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super.didReceiveAttrs(...arguments);
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// trigger auto-expand any time the value changes
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if (this.autoExpand) {
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run.scheduleOnce('afterRender', this, this._autoExpand);
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}
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}
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willInsertElement() {
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super.willInsertElement(...arguments);
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// disable the draggable resize element that browsers add to textareas
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if (this.autoExpand) {
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this.element.style.resize = 'none';
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}
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}
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didInsertElement() {
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super.didInsertElement(...arguments);
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// set up resize handler on element insert so that we can autoexpand
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// when the element container changes size
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if (this.autoExpand) {
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run.scheduleOnce('afterRender', this, this._setupAutoExpand);
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}
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if (this.didCreateTextarea) {
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this.didCreateTextarea(this.element);
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}
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}
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willDestroyElement() {
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this._teardownAutoExpand();
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super.willDestroyElement(...arguments);
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}
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_autoExpand() {
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let el = this.element;
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// collapse the element first so that we can shrink as well as expand
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// then set the height to match the text height
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if (el) {
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el.style.height = 0;
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el.style.height = `${el.scrollHeight}px`;
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}
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}
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_setupAutoExpand() {
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this._resizeCallback = run.bind(this, this._onResize);
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this.resizeDetector.setup(this.autoExpand, this._resizeCallback);
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this._autoExpand();
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}
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_onResize() {
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this._autoExpand();
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}
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_teardownAutoExpand() {
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this.resizeDetector.teardown(this.autoExpand, this._resizeCallback);
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}
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}
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