@krassowski/jupyterlab_go_to_definition/lib/testutils.js

Jump to definition of a variable or function in JupyterLab

import { CodeJumper } from './jumpers/jumper';
export function matchToken(tokens, tokenName, tokenOccurrence = 1, tokenType = 'variable') {
    let matchedTokens = tokens.filter(token => token.value === tokenName && token.type === tokenType);
    return matchedTokens[tokenOccurrence - 1];
}
// TODO: refactor into a factory which accepts language and cwd as options
export class Jumper extends CodeJumper {
    constructor(editor) {
        super();
        this.cwd = '';
        this.language = 'python';
        this.editor = editor;
    }
    get editors() {
        return [this.editor];
    }
    jump_to_definition(jump) {
        let { token } = this._findLastDefinition(jump.token, 0);
        // nothing found
        if (!token) {
            return;
        }
        let position = this.editor.getPositionAt(token.offset);
        this.editor.setSelection({ start: position, end: position });
    }
    jump(position) {
        // nothing here yet
    }
    getOffset(position, cell) {
        return 0;
    }
    getJumpPosition(position, input_number) {
        return undefined;
    }
}
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