editors/code/src/events/change_text_document.ts


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import * as vscode from 'vscode';

import { syntaxTreeUri, TextDocumentContentProvider } from '../commands/syntaxTree';

export function createHandler(textDocumentContentProvider: TextDocumentContentProvider) {
    return (event: vscode.TextDocumentChangeEvent) => {
        let doc = event.document
        if (doc.languageId != "rust") return
        afterLs(() => {
            textDocumentContentProvider.eventEmitter.fire(syntaxTreeUri);
        })
    }
}

// We need to order this after LS updates, but there's no API for that.
// Hence, good old setTimeout.
function afterLs(f: () => any) {
    setTimeout(f, 10)
}