71 lines
1.9 KiB
TypeScript
71 lines
1.9 KiB
TypeScript
import { EditorState } from "@codemirror/state";
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import { EditorView, keymap, highlightSpecialChars } from "@codemirror/view";
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import {
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history,
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historyKeymap,
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defaultKeymap,
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insertNewline,
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indentLess,
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} from "@codemirror/commands";
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import { searchKeymap, highlightSelectionMatches } from "@codemirror/search";
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import { indentUnit, bracketMatching, syntaxHighlighting } from "@codemirror/language";
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import { javascript } from "@codemirror/lang-javascript";
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import { classHighlighter } from "@lezer/highlight";
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function createCodemirror(inputListener?: () => void) {
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const editor = new EditorView({
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state: EditorState.create({
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extensions: [
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keymap.of([
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{ key: "Enter", run: insertNewline },
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{
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key: "Tab",
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run: ({ state, dispatch }) => (dispatch(state.replaceSelection("\t")), true),
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shift: indentLess,
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},
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...searchKeymap,
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...historyKeymap,
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...defaultKeymap,
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]),
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EditorView.lineWrapping,
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EditorState.tabSize.of(3),
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indentUnit.of("\t"),
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history(),
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bracketMatching(),
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highlightSelectionMatches(),
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highlightSpecialChars(),
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javascript(),
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syntaxHighlighting(classHighlighter),
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EditorView.updateListener.of(v => {
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if (v.docChanged && inputListener) {
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inputListener();
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}
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}),
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],
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}),
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});
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editor.dom.id = "code-editor";
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editor.dom.ariaLabel = "Code editor";
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return editor;
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}
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// replace a textarea with codemirror
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export function replace(editCallback: () => void, textarea: HTMLTextAreaElement): EditorView {
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const codemirror = createCodemirror(editCallback);
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codemirror.dispatch({ changes: { from: 0, insert: textarea.value } });
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let selection;
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if (document.activeElement === textarea) {
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selection = {
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anchor: textarea.selectionStart,
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head: textarea.selectionEnd,
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};
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}
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textarea.replaceWith(codemirror.dom);
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if (selection) {
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codemirror.focus();
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codemirror.dispatch({ selection });
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}
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return codemirror;
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}
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