183 lines
5.1 KiB
Plaintext
183 lines
5.1 KiB
Plaintext
import { useEffect, useLayoutEffect, useState } from 'react';
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import { Annotation, EditorState, StateEffect } from '@codemirror/state';
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import { EditorView } from '@codemirror/view';
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import { getDefaultExtensions } from "./getDefaultExtensions.js";
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import { getStatistics } from "./utils.js";
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import { TimeoutLatch, getScheduler } from "./timeoutLatch.js";
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export var ExternalChange = Annotation.define();
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var TYPING_TIMOUT = 200; // ms
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var emptyExtensions = [];
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export function useCodeMirror(props) {
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var {
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value,
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selection,
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onChange,
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onStatistics,
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onCreateEditor,
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onUpdate,
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extensions = emptyExtensions,
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autoFocus,
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theme = 'light',
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height = null,
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minHeight = null,
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maxHeight = null,
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width = null,
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minWidth = null,
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maxWidth = null,
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placeholder: placeholderStr = '',
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editable = true,
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readOnly = false,
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indentWithTab: defaultIndentWithTab = true,
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basicSetup: defaultBasicSetup = true,
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root,
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initialState
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} = props;
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var [container, setContainer] = useState();
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var [view, setView] = useState();
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var [state, setState] = useState();
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var typingLatch = useState(() => ({
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current: null
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}))[0];
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var pendingUpdate = useState(() => ({
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current: null
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}))[0];
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var defaultThemeOption = EditorView.theme({
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'&': {
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height,
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minHeight,
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maxHeight,
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width,
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minWidth,
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maxWidth
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},
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'& .cm-scroller': {
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height: '100% !important'
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}
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});
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var updateListener = EditorView.updateListener.of(vu => {
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if (vu.docChanged && typeof onChange === 'function' &&
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// Fix echoing of the remote changes:
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// If transaction is market as remote we don't have to call `onChange` handler again
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!vu.transactions.some(tr => tr.annotation(ExternalChange))) {
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if (typingLatch.current) {
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typingLatch.current.reset();
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} else {
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typingLatch.current = new TimeoutLatch(() => {
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if (pendingUpdate.current) {
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var forceUpdate = pendingUpdate.current;
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pendingUpdate.current = null;
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forceUpdate();
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}
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typingLatch.current = null;
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}, TYPING_TIMOUT);
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getScheduler().add(typingLatch.current);
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}
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var doc = vu.state.doc;
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var _value = doc.toString();
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onChange(_value, vu);
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}
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onStatistics && onStatistics(getStatistics(vu));
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});
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var defaultExtensions = getDefaultExtensions({
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theme,
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editable,
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readOnly,
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placeholder: placeholderStr,
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indentWithTab: defaultIndentWithTab,
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basicSetup: defaultBasicSetup
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});
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var getExtensions = [updateListener, defaultThemeOption, ...defaultExtensions];
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if (onUpdate && typeof onUpdate === 'function') {
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getExtensions.push(EditorView.updateListener.of(onUpdate));
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}
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getExtensions = getExtensions.concat(extensions);
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useLayoutEffect(() => {
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if (container && !state) {
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var config = {
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doc: value,
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selection,
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extensions: getExtensions
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};
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var stateCurrent = initialState ? EditorState.fromJSON(initialState.json, config, initialState.fields) : EditorState.create(config);
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setState(stateCurrent);
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if (!view) {
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var viewCurrent = new EditorView({
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state: stateCurrent,
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parent: container,
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root
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});
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setView(viewCurrent);
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onCreateEditor && onCreateEditor(viewCurrent, stateCurrent);
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}
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}
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return () => {
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if (view) {
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setState(undefined);
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setView(undefined);
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}
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};
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}, [container, state]);
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useEffect(() => {
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if (props.container) {
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setContainer(props.container);
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}
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}, [props.container]);
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useEffect(() => () => {
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if (view) {
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view.destroy();
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setView(undefined);
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}
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if (typingLatch.current) {
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typingLatch.current.cancel();
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typingLatch.current = null;
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}
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}, [view]);
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useEffect(() => {
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if (autoFocus && view) {
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view.focus();
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}
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}, [autoFocus, view]);
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useEffect(() => {
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if (view) {
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view.dispatch({
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effects: StateEffect.reconfigure.of(getExtensions)
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});
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}
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, [theme, extensions, height, minHeight, maxHeight, width, minWidth, maxWidth, placeholderStr, editable, readOnly, defaultIndentWithTab, defaultBasicSetup, onChange, onUpdate]);
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useEffect(() => {
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if (value === undefined) {
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return;
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}
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var currentValue = view ? view.state.doc.toString() : '';
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if (view && value !== currentValue) {
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var isTyping = typingLatch.current && !typingLatch.current.isDone;
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var forceUpdate = () => {
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if (view && value !== view.state.doc.toString()) {
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view.dispatch({
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changes: {
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from: 0,
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to: view.state.doc.toString().length,
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insert: value || ''
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},
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annotations: [ExternalChange.of(true)]
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});
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}
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};
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if (!isTyping) {
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forceUpdate();
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} else {
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pendingUpdate.current = forceUpdate;
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}
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}
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}, [value, view]);
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return {
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state,
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setState,
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view,
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setView,
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container,
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setContainer
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};
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} |