@jupyter-lsp/code-jumpers/lib/jumpers/notebook.js

Implementation underlying the jump to definition functionality in JupyterLab-LSP

import { JumpHistory } from '../history';
import { _ensureFocus } from '../notebook_private';
import { CodeJumper, jumpers } from './jumper';
export class NotebookJumper extends CodeJumper {
    constructor(notebookWidget, documentManager) {
        super();
        this.widget = notebookWidget;
        this.notebook = notebookWidget.content;
        this.history = new JumpHistory();
        this.documentManager = documentManager;
    }
    get editors() {
        return this.notebook.widgets.map(cell => cell.editor);
    }
    jump(position) {
        let { token, index } = position;
        // Prevents event propagation issues
        setTimeout(() => {
            this.notebook.deselectAll();
            this.notebook.activeCellIndex = index;
            _ensureFocus(this.notebook);
            this.notebook.mode = 'edit';
            // find out offset for the element
            let activeEditor = this.notebook.activeCell.editor;
            // place cursor in the line with the definition
            let position = activeEditor.getPositionAt(token.offset);
            activeEditor.setSelection({ start: position, end: position });
        }, 0);
    }
    getOffset(position, cell = 0) {
        return this.editors[cell].getOffsetAt(position);
    }
    getCurrentPosition() {
        let position = this.editors[this.notebook.activeCellIndex].getCursorPosition();
        return {
            editorIndex: this.notebook.activeCellIndex,
            line: position.line,
            column: position.column,
            contentsPath: this.widget.context.path,
            isSymlink: false
        };
    }
    getJumpPosition(position, inputNumber) {
        return {
            token: {
                offset: this.getOffset(position, inputNumber),
                value: ''
            },
            index: inputNumber
        };
    }
}
jumpers.set('notebook', NotebookJumper);
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