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/* eslint-disable no-param-reassign */
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import React, {
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ClipboardEventHandler,
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KeyboardEventHandler,
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ReactNode,
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forwardRef,
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useCallback,
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useState,
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useEffect,
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useRef,
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} from 'react';
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import { Box, Scroll, Text } from 'folds';
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import { Descendant, Editor, createEditor, Transforms, Range, Element as SlateElement, Text as SlateText, Point } from 'slate';
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import {
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Slate,
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Editable,
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withReact,
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RenderLeafProps,
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RenderElementProps,
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RenderPlaceholderProps,
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} from 'slate-react';
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import { withHistory } from 'slate-history';
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import { BlockType } from './types';
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import { RenderElement, RenderLeaf } from './Elements';
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import { CustomElement } from './slate';
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import * as css from './Editor.css';
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import { toggleKeyboardShortcut } from './keyboard';
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import { createCommandElement } from './utils';
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const initialValue: CustomElement[] = [
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{
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type: BlockType.Paragraph,
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children: [{ text: '' }],
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},
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];
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const withInline = (editor: Editor): Editor => {
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const { isInline } = editor;
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editor.isInline = (element) =>
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[BlockType.Mention, BlockType.Emoticon, BlockType.Link, BlockType.Command].includes(
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element.type
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) || isInline(element);
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return editor;
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};
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const withVoid = (editor: Editor): Editor => {
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const { isVoid } = editor;
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editor.isVoid = (element) =>
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[BlockType.Mention, BlockType.Emoticon, BlockType.Command].includes(element.type) ||
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isVoid(element);
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return editor;
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};
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type CommandValidatorFn = (commandName: string) => boolean;
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let commandValidator: CommandValidatorFn | null = null;
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export const setCommandValidator = (validator: CommandValidatorFn) => {
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commandValidator = validator;
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};
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const withCommandAutoConvert = (editor: Editor): Editor => {
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// Removed auto-conversion on space to prevent focus issues
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// Commands are now highlighted visually via decorations
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// and executed when Enter is pressed
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return editor;
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};
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export const useEditor = (): Editor => {
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const [editor] = useState(() =>
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withCommandAutoConvert(withInline(withVoid(withReact(withHistory(createEditor())))))
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);
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return editor;
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};
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export type EditorChangeHandler = (value: Descendant[]) => void;
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type CustomEditorProps = {
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editableName?: string;
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top?: ReactNode;
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bottom?: ReactNode;
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before?: ReactNode;
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after?: ReactNode;
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maxHeight?: string;
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editor: Editor;
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placeholder?: string;
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onKeyDown?: KeyboardEventHandler;
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onKeyUp?: KeyboardEventHandler;
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onChange?: EditorChangeHandler;
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onPaste?: ClipboardEventHandler;
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};
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export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
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(
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{
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editableName,
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top,
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bottom,
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before,
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after,
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maxHeight = '50vh',
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editor,
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placeholder,
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onKeyDown,
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onKeyUp,
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onChange,
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onPaste,
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},
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ref
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) => {
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const renderElement = useCallback(
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(props: RenderElementProps) => <RenderElement {...props} />,
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[]
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);
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const renderLeaf = useCallback((props: RenderLeafProps) => <RenderLeaf {...props} />, []);
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const decorate = useCallback(([node, path]: [any, number[]]) => {
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const ranges: any[] = [];
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// Only decorate text nodes in the first paragraph
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if (
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path.length === 2 &&
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path[0] === 0 &&
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path[1] === 0 &&
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SlateText.isText(node)
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) {
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const firstChild = editor.children[0];
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if (SlateElement.isElement(firstChild) && firstChild.type === BlockType.Paragraph) {
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const [firstInline, secondInline] = firstChild.children;
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// Don't decorate if we already have a CommandElement
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if (SlateElement.isElement(secondInline) && secondInline.type === BlockType.Command) {
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return ranges;
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}
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// Check if the text matches /command pattern
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const text = node.text;
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const match = text.match(/^(\s*\/\w+)/);
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if (match && commandValidator) {
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const commandText = match[1].trim();
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const commandName = commandText.substring(1);
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if (commandValidator(commandName)) {
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// Create decoration for the command text
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ranges.push({
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anchor: { path, offset: 0 },
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focus: { path, offset: match[1].length },
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pendingCommand: true,
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});
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}
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}
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}
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}
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return ranges;
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}, [editor]);
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const handleKeydown: KeyboardEventHandler = useCallback(
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(evt) => {
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onKeyDown?.(evt);
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const shortcutToggled = toggleKeyboardShortcut(editor, evt);
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if (shortcutToggled) evt.preventDefault();
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},
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[editor, onKeyDown]
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);
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const handleBeforeInput = useCallback(
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(event: Event) => {
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const inputEvent = event as InputEvent;
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// Handle autocorrect replacement that causes text duplication
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if (inputEvent.inputType === 'insertReplacementText' ||
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inputEvent.inputType === 'insertFromComposition') {
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const { selection } = editor;
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if (!selection) return;
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// Get the data being inserted
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const data = inputEvent.data || inputEvent.dataTransfer?.getData('text/plain');
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if (data) {
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event.preventDefault();
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// If there's selected text, delete it first
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if (selection && !Range.isCollapsed(selection)) {
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Transforms.delete(editor, { at: selection });
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}
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// Insert the replacement text
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editor.insertText(data);
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}
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}
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},
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[editor]
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);
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const editableRef = useRef<HTMLDivElement>(null);
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useEffect(() => {
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const editableElement = editableRef.current?.querySelector('[data-slate-editor="true"]');
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if (!editableElement) return;
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editableElement.addEventListener('beforeinput', handleBeforeInput, { capture: true });
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return () => {
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editableElement.removeEventListener('beforeinput', handleBeforeInput, { capture: true });
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};
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}, [handleBeforeInput]);
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const renderPlaceholder = useCallback(
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({ attributes, children }: RenderPlaceholderProps) => (
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<span {...attributes} className={css.EditorPlaceholderContainer}>
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{/* Inner component to style the actual text position and appearance */}
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<Text as="span" className={css.EditorPlaceholderTextVisual} truncate>
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{children}
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</Text>
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</span>
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),
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[]
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);
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return (
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<div className={css.Editor} ref={ref}>
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<Slate editor={editor} initialValue={initialValue} onChange={onChange}>
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{top}
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<Box alignItems="Start">
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{before && (
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<Box className={css.EditorOptions} alignItems="Center" gap="100" shrink="No">
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{before}
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</Box>
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)}
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<Scroll
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className={css.EditorTextareaScroll}
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variant="SurfaceVariant"
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style={{ maxHeight }}
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size="300"
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visibility="Hover"
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hideTrack
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ref={editableRef}
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>
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<Editable
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data-editable-name={editableName}
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className={css.EditorTextarea}
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placeholder={placeholder}
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renderPlaceholder={renderPlaceholder}
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renderElement={renderElement}
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renderLeaf={renderLeaf}
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decorate={decorate}
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onKeyDown={handleKeydown}
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onKeyUp={onKeyUp}
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onPaste={onPaste}
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/>
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</Scroll>
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{after && (
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<Box className={css.EditorOptions} alignItems="Center" gap="100" shrink="No">
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{after}
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</Box>
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)}
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</Box>
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{bottom}
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</Slate>
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</div>
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);
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}
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);
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