Enhancing editor.selections in Visual Studio Code Extension

I'm currently developing a vscode extension that involves moving each selection of a multi-selection to the right by one character. The challenge lies in updating the TextEditor.selections array, which stores all current selections in the GUI.

When I set TextEditor.selection to a new vscode.Selection, the primary selection in the GUI updates accurately. However, updating TextEditor.selections[n] with a new selection does not reflect changes in the GUI. This limitation prevents me from updating all selections simultaneously. It seems that using the shorthand TextEditor.selection triggers a GUI update, while using TextEditor.selections[n] does not.

My question is: how can I update all selections in TextEditor.selections?

Below is the code snippet I have for updating selections:

import * as vscode from "vscode";

function updateSelections(
  editor: vscode.TextEditor,
  selections: vscode.Selection[]
) {
  selections.forEach((sel) => {
    const selStart = sel.start;
    const selEnd = sel.end;

    // TODO: only primary selection appears to be editable ; "editor.selections[n] = something" does not change anything
    // This works
    editor.selection = new vscode.Selection(
      selStart.translate(0, 1),
      selEnd.translate(0, 1)
    );
    // This does not work
    editor.selections[0] = new vscode.Selection(
      selStart.translate(0, 1),
      selEnd.translate(0, 1)
    );
  });
}

Answer №1

When you update selections by assigning a new Array, it successfully works.

editor.selections = editor.selections.map( sel => new vscode.Selection(sel.start.translate(0,1), sel.end.translate(0,1)));

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