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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 | 1x 1x 1x 25x 25x 25x 25x 25x 25x 25x 25x 9x 2x 1x 1x 1x 1x 1x 1x 9x 25x 25x 25x 3x 25x 25x 24x 6x 6x 6x 6x 6x 6x 6x 24x 21x 6x 6x 25x 9x 25x 15x 12x 6x 6x 12x 1x 1x 25x 15x 2x 25x 24x 7x 25x 16x 16x 16x 1x 1x 1x 1x 1x 1x 25x | import { useEffect, useLayoutEffect, useState } from 'react';
import { Annotation, EditorState, StateEffect, type Extension } from '@codemirror/state';
import { EditorView, type ViewUpdate } from '@codemirror/view';
import { getDefaultExtensions } from './getDefaultExtensions';
import { getStatistics } from './utils';
import { type ReactCodeMirrorProps } from '.';
import { TimeoutLatch, getScheduler } from './timeoutLatch';
const External = Annotation.define<boolean>();
const TYPING_TIMOUT = 200; // ms
export interface UseCodeMirror extends ReactCodeMirrorProps {
container?: HTMLDivElement | null;
}
const emptyExtensions: Extension[] = [];
export function useCodeMirror(props: UseCodeMirror) {
const {
value,
selection,
onChange,
onStatistics,
onCreateEditor,
onUpdate,
extensions = emptyExtensions,
autoFocus,
theme = 'light',
height = null,
minHeight = null,
maxHeight = null,
width = null,
minWidth = null,
maxWidth = null,
placeholder: placeholderStr = '',
editable = true,
readOnly = false,
indentWithTab: defaultIndentWithTab = true,
basicSetup: defaultBasicSetup = true,
root,
initialState,
} = props;
const [container, setContainer] = useState<HTMLDivElement | null>();
const [view, setView] = useState<EditorView>();
const [state, setState] = useState<EditorState>();
const typingLatch = useState<{ current: TimeoutLatch | null }>(() => ({ current: null }))[0];
const pendingUpdate = useState<{ current: (() => void) | null }>(() => ({ current: null }))[0];
const defaultThemeOption = EditorView.theme({
'&': {
height,
minHeight,
maxHeight,
width,
minWidth,
maxWidth,
},
'& .cm-scroller': {
height: '100% !important',
},
});
const updateListener = EditorView.updateListener.of((vu: ViewUpdate) => {
if (
vu.docChanged &&
typeof onChange === 'function' &&
// Fix echoing of the remote changes:
// If transaction is market as remote we don't have to call `onChange` handler again
!vu.transactions.some((tr) => tr.annotation(External))
) {
Iif (typingLatch.current) {
typingLatch.current.reset();
} else {
typingLatch.current = new TimeoutLatch(() => {
if (pendingUpdate.current) {
const forceUpdate = pendingUpdate.current;
pendingUpdate.current = null;
forceUpdate();
}
typingLatch.current = null;
}, TYPING_TIMOUT);
getScheduler().add(typingLatch.current);
}
const doc = vu.state.doc;
const value = doc.toString();
onChange(value, vu);
}
onStatistics && onStatistics(getStatistics(vu));
});
const defaultExtensions = getDefaultExtensions({
theme,
editable,
readOnly,
placeholder: placeholderStr,
indentWithTab: defaultIndentWithTab,
basicSetup: defaultBasicSetup,
});
let getExtensions = [updateListener, defaultThemeOption, ...defaultExtensions];
if (onUpdate && typeof onUpdate === 'function') {
getExtensions.push(EditorView.updateListener.of(onUpdate));
}
getExtensions = getExtensions.concat(extensions);
useLayoutEffect(() => {
if (container && !state) {
const config = {
doc: value,
selection,
extensions: getExtensions,
};
const stateCurrent = initialState
? EditorState.fromJSON(initialState.json, config, initialState.fields)
: EditorState.create(config);
setState(stateCurrent);
Eif (!view) {
const viewCurrent = new EditorView({
state: stateCurrent,
parent: container,
root,
});
setView(viewCurrent);
onCreateEditor && onCreateEditor(viewCurrent, stateCurrent);
}
}
return () => {
if (view) {
setState(undefined);
setView(undefined);
}
};
}, [container, state]);
useEffect(() => {
Iif (props.container) {
setContainer(props.container);
}
}, [props.container]);
useEffect(
() => () => {
if (view) {
view.destroy();
setView(undefined);
}
if (typingLatch.current) {
typingLatch.current.cancel();
typingLatch.current = null;
}
},
[view],
);
useEffect(() => {
if (autoFocus && view) {
view.focus();
}
}, [autoFocus, view]);
useEffect(() => {
if (view) {
view.dispatch({ effects: StateEffect.reconfigure.of(getExtensions) });
}
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [
theme,
extensions,
height,
minHeight,
maxHeight,
width,
minWidth,
maxWidth,
placeholderStr,
editable,
readOnly,
defaultIndentWithTab,
defaultBasicSetup,
onChange,
onUpdate,
]);
useEffect(() => {
Iif (value === undefined) {
return;
}
const currentValue = view ? view.state.doc.toString() : '';
if (view && value !== currentValue) {
const isTyping = typingLatch.current && !typingLatch.current.isDone;
const forceUpdate = () => {
Eif (view && value !== view.state.doc.toString()) {
view.dispatch({
changes: { from: 0, to: view.state.doc.toString().length, insert: value || '' },
annotations: [External.of(true)],
});
}
};
if (!isTyping) {
forceUpdate();
} else E{
pendingUpdate.current = forceUpdate;
}
}
}, [value, view]);
return { state, setState, view, setView, container, setContainer };
}
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