Identify if cursor is at a multiline comment

[wa8f7192]

Hi,

I would like to know if it is possible to know if the current cursor is at a multiline comment, before user closes the multiline comment.

We found that if we close the multiline comment we are able to detect it with the given code

Works for these examples

/*
<user's cursor>
*/

/* <user's cursor>
*/

// Single line comment works as well <user's cursor>

Doesn't work for this

/* <user's cursor>

Our current code

// Code to detect if the cursor position is at a comment
export const positionIsAtComment = (document: LangiumDocument<AstNode>, position: Position): boolean => {
    const documentCstNode = document.parseResult.value.$cstNode;
    if (!documentCstNode) {
        return false;
    }
    const offset = document.textDocument.offsetAt(position);
    const cstNode = CstUtils.findDeclarationNodeAtOffset(documentCstNode, offset);
    

    if (cstNode?.tokenType) {
        return cstNode.tokenType.name.toUpperCase().includes('COMMENT');
    }
    return false;
}

These are the rules used for terminal for us

hidden terminal WS: /\s+/;
terminal ID: /[_a-zA-Z][\w_]*/;
terminal NUMBER returns number: /[0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?/;
hidden terminal ML_COMMENT: /(\/\*[\s\S]*?\*\/)/;
hidden terminal ML_COMMENT1: '(*' -> '*)';
hidden terminal SL_COMMENT: /\/\/[^\n\r]*/;

[wa8f7192]

Closing, duplicate of #1719