@atlaskit/editor-plugin-base/dist/es2019/pm-plugins/newline-preserve-marks.js

Base plugin for @atlaskit/editor-core

import { SafePlugin } from '@atlaskit/editor-common/safe-plugin';
import { filterCommand as filter, isSelectionEndOfParagraph } from '@atlaskit/editor-common/utils';
import { keydownHandler } from '@atlaskit/editor-prosemirror/keymap';
import { PluginKey } from '@atlaskit/editor-prosemirror/state';
import { expValEquals } from '@atlaskit/tmp-editor-statsig/exp-val-equals';
export const newlinePreserveMarksKey = new PluginKey('newlinePreserveMarksPlugin');
const isSelectionAligned = state => !!state.selection.$to.parent.marks.find(m => m.type === state.schema.marks.alignment);
const isSelectionFontSized = state => {
  const {
    blockTaskItem,
    listItem
  } = state.schema.nodes;
  const {
    fontSize
  } = state.schema.marks;
  const $to = state.selection.$to;
  const grandParent = $to.node($to.depth - 1);
  if (!fontSize ||
  // don't intercept Enter inside blockTaskItem or listItem
  grandParent && (grandParent.type === blockTaskItem || grandParent.type === listItem)) {
    return false;
  }
  return !!$to.parent.marks.find(m => m.type === fontSize);
};
const hasBlockMarksToPreserve = state => isSelectionAligned(state) || isSelectionFontSized(state);
const splitBlockPreservingMarks = (state, dispatch) => {
  if (dispatch) {
    dispatch(state.tr.split(state.tr.mapping.map(state.selection.$from.pos), 1));
  }
  return true;
};
export default (() => new SafePlugin({
  key: newlinePreserveMarksKey,
  props: {
    handleKeyDown: keydownHandler({
      Enter: expValEquals('platform_editor_small_font_size', 'isEnabled', true) ? filter([isSelectionEndOfParagraph, hasBlockMarksToPreserve], splitBlockPreservingMarks) : filter([isSelectionEndOfParagraph, isSelectionAligned], splitBlockPreservingMarks)
    })
  }
}));