314 lines
11 KiB
JavaScript
314 lines
11 KiB
JavaScript
// @flow
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import 'easymde/dist/easymde.min.css';
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import { FF_MAX_CHARS_DEFAULT } from 'constants/form-field';
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import { openEditorMenu, stopContextMenu } from 'util/context-menu';
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import { lazyImport } from 'util/lazyImport';
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import * as ICONS from 'constants/icons';
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import Button from 'component/button';
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import MarkdownPreview from 'component/common/markdown-preview';
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import React from 'react';
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import ReactDOMServer from 'react-dom/server';
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import SimpleMDE from 'react-simplemde-editor';
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import type { ElementRef, Node } from 'react';
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// prettier-ignore
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const TextareaWithSuggestions = lazyImport(() => import('component/textareaWithSuggestions' /* webpackChunkName: "suggestions" */));
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type Props = {
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affixClass?: string, // class applied to prefix/postfix label
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autoFocus?: boolean,
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blockWrap: boolean,
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charCount?: number,
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children?: React$Node,
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defaultValue?: string | number,
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disabled?: boolean,
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error?: string | boolean,
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helper?: string | React$Node,
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hideSuggestions?: boolean,
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inputButton?: React$Node,
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isLivestream?: boolean,
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label?: string | Node,
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labelOnLeft: boolean,
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max?: number,
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min?: number,
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name: string,
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noEmojis?: boolean,
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placeholder?: string | number,
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postfix?: string,
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prefix?: string,
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quickActionLabel?: string,
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range?: number,
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readOnly?: boolean,
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stretch?: boolean,
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textAreaMaxLength?: number,
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type?: string,
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value?: string | number,
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onChange?: (any) => any,
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openEmoteMenu?: () => void,
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quickActionHandler?: (any) => any,
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render?: () => React$Node,
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};
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export class FormField extends React.PureComponent<Props> {
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static defaultProps = { labelOnLeft: false, blockWrap: true };
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input: { current: ElementRef<any> };
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constructor(props: Props) {
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super(props);
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this.input = React.createRef();
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}
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componentDidMount() {
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const { autoFocus } = this.props;
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const input = this.input.current;
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if (input && autoFocus) input.focus();
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}
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render() {
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const {
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affixClass,
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autoFocus,
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blockWrap,
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charCount,
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children,
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error,
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helper,
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hideSuggestions,
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inputButton,
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isLivestream,
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label,
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labelOnLeft,
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name,
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noEmojis,
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postfix,
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prefix,
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quickActionLabel,
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stretch,
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textAreaMaxLength,
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type,
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openEmoteMenu,
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quickActionHandler,
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render,
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...inputProps
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} = this.props;
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const errorMessage = typeof error === 'object' ? error.message : error;
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// Ideally, the character count should (and can) be appended to the
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// SimpleMDE's "options::status" bar. However, I couldn't figure out how
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// to pass the current value to it's callback, nor query the current
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// text length from the callback. So, we'll use our own widget.
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const hasCharCount = charCount !== undefined && charCount >= 0;
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const countInfo = hasCharCount && textAreaMaxLength !== undefined && (
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<span className="comment__char-count-mde">{`${charCount || '0'}/${textAreaMaxLength}`}</span>
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);
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const Wrapper = blockWrap
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? ({ children: innerChildren }) => <fieldset-section class="radio">{innerChildren}</fieldset-section>
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: ({ children: innerChildren }) => <span className="radio">{innerChildren}</span>;
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const quickAction =
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quickActionLabel && quickActionHandler ? (
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<div className="form-field__quick-action">
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<Button button="link" onClick={quickActionHandler} label={quickActionLabel} />
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</div>
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) : null;
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const inputSimple = (type: string) => (
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<>
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<input id={name} type={type} {...inputProps} />
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<label htmlFor={name}>{label}</label>
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</>
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);
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const inputSelect = (selectClass: string) => (
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<fieldset-section class={selectClass}>
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{(label || errorMessage) && (
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<label htmlFor={name}>{errorMessage ? <span className="error__text">{errorMessage}</span> : label}</label>
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)}
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<select id={name} {...inputProps}>
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{children}
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</select>
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</fieldset-section>
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);
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const input = () => {
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switch (type) {
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case 'radio':
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return <Wrapper>{inputSimple('radio')}</Wrapper>;
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case 'checkbox':
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return <div className="checkbox">{inputSimple('checkbox')}</div>;
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case 'range':
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return <div>{inputSimple('range')}</div>;
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case 'select':
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return inputSelect('');
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case 'select-tiny':
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return inputSelect('select--slim');
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case 'markdown':
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const handleEvents = { contextmenu: openEditorMenu };
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const getInstance = (editor) => {
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// SimpleMDE max char check
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editor.codemirror.on('beforeChange', (instance, changes) => {
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if (textAreaMaxLength && changes.update) {
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var str = changes.text.join('\n');
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var delta = str.length - (instance.indexFromPos(changes.to) - instance.indexFromPos(changes.from));
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if (delta <= 0) return;
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delta = instance.getValue().length + delta - textAreaMaxLength;
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if (delta > 0) {
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str = str.substr(0, str.length - delta);
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changes.update(changes.from, changes.to, str.split('\n'));
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}
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}
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});
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// "Create Link (Ctrl-K)": highlight URL instead of label:
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editor.codemirror.on('changes', (instance, changes) => {
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try {
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// Grab the last change from the buffered list. I assume the
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// buffered one ('changes', instead of 'change') is more efficient,
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// and that "Create Link" will always end up last in the list.
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const lastChange = changes[changes.length - 1];
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if (lastChange.origin === '+input') {
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// https://github.com/Ionaru/easy-markdown-editor/blob/8fa54c496f98621d5f45f57577ce630bee8c41ee/src/js/easymde.js#L765
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const EASYMDE_URL_PLACEHOLDER = '(https://)';
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// The URL placeholder is always placed last, so just look at the
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// last text in the array to also cover the multi-line case:
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const urlLineText = lastChange.text[lastChange.text.length - 1];
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if (urlLineText.endsWith(EASYMDE_URL_PLACEHOLDER) && urlLineText !== '[]' + EASYMDE_URL_PLACEHOLDER) {
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const from = lastChange.from;
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const to = lastChange.to;
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const isSelectionMultiline = lastChange.text.length > 1;
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const baseIndex = isSelectionMultiline ? 0 : from.ch;
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// Everything works fine for the [Ctrl-K] case, but for the
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// [Button] case, this handler happens before the original
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// code, thus our change got wiped out.
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// Add a small delay to handle that case.
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setTimeout(() => {
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instance.setSelection(
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{ line: to.line, ch: baseIndex + urlLineText.lastIndexOf('(') + 1 },
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{ line: to.line, ch: baseIndex + urlLineText.lastIndexOf(')') }
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);
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}, 25);
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}
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}
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} catch (e) {} // Do nothing (revert to original behavior)
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});
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};
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return (
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<div className="form-field--SimpleMDE" onContextMenu={stopContextMenu}>
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<fieldset-section>
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<div className="form-field__two-column">
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<div>
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<label htmlFor={name}>{label}</label>
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</div>
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{quickAction}
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</div>
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<SimpleMDE
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{...inputProps}
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id={name}
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type="textarea"
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events={handleEvents}
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getMdeInstance={getInstance}
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options={{
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spellChecker: true,
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hideIcons: ['heading', 'image', 'fullscreen', 'side-by-side'],
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previewRender(plainText) {
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const preview = <MarkdownPreview content={plainText} noDataStore />;
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return ReactDOMServer.renderToString(preview);
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},
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}}
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/>
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{countInfo}
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</fieldset-section>
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</div>
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);
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case 'textarea':
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return (
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<fieldset-section>
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{(label || quickAction) && (
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<div className="form-field__two-column">
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<label htmlFor={name}>{label}</label>
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{quickAction}
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</div>
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)}
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{hideSuggestions ? (
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<textarea
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type={type}
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id={name}
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maxLength={textAreaMaxLength || FF_MAX_CHARS_DEFAULT}
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ref={this.input}
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{...inputProps}
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/>
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) : (
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<React.Suspense fallback={null}>
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<TextareaWithSuggestions
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type={type}
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id={name}
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maxLength={textAreaMaxLength || FF_MAX_CHARS_DEFAULT}
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inputRef={this.input}
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isLivestream={isLivestream}
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{...inputProps}
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/>
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</React.Suspense>
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)}
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<div className="form-field__textarea-info">
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{!noEmojis && openEmoteMenu && (
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<Button
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type="alt"
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className="button--file-action"
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title="Emotes"
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onClick={openEmoteMenu}
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icon={ICONS.EMOJI}
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iconSize={20}
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/>
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)}
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{countInfo}
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</div>
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</fieldset-section>
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);
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default:
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const inputElement = <input type={type} id={name} {...inputProps} ref={this.input} />;
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const inner = inputButton ? (
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<input-submit>
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{inputElement}
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{inputButton}
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</input-submit>
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) : (
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inputElement
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);
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return (
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<fieldset-section>
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{(label || errorMessage) && (
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<label htmlFor={name}>
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{errorMessage ? <span className="error__text">{errorMessage}</span> : label}
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</label>
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)}
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{prefix && <label htmlFor={name}>{prefix}</label>}
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{inner}
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</fieldset-section>
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);
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}
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};
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return (
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<>
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{type && input()}
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{helper && <div className="form-field__help">{helper}</div>}
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</>
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);
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}
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}
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export default FormField;
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