/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow strict-local
 * @emails oncall+draft_js
 */
'use strict';

const EditorState = require("./EditorState");
/**
 * Collapse selection at the start of the first selected block. This is used
 * for Firefox versions that attempt to navigate forward/backward instead of
 * moving the cursor. Other browsers are able to move the cursor natively.
 */


function keyCommandMoveSelectionToStartOfBlock(editorState: EditorState): EditorState {
  const selection = editorState.getSelection();
  const startKey = selection.getStartKey();
  return EditorState.set(editorState, {
    selection: selection.merge({
      anchorKey: startKey,
      anchorOffset: 0,
      focusKey: startKey,
      focusOffset: 0,
      isBackward: false
    }),
    forceSelection: true
  });
}

module.exports = keyCommandMoveSelectionToStartOfBlock;