@atlaskit/editor-plugin-show-diff/dist/es2019/pm-plugins/getDeletedWidgets.js

ShowDiff plugin for @atlaskit/editor-core

import { isDiffDecorationSpec } from './decorations/decorationKeys';
import { showDiffPluginKey } from './main';

// prosemirror-view does not type `Decoration.type`; a widget's `type.toDOM` is the node passed to
// `Decoration.widget()` (an element or a factory — the `WidgetConstructor` union).

// The element a deleted-content widget renders, or undefined if it renders via a factory.
const getWidgetElement = decoration => {
  var _type;
  const {
    toDOM
  } = (_type = decoration.type) !== null && _type !== void 0 ? _type : {};
  return toDOM instanceof HTMLElement ? toDOM : undefined;
};

/**
 * The rendered deleted-content widgets in `editorState`, optionally restricted to `[from, to]`,
 * ordered by position. Deleted content is rendered as widget decorations rather than document
 * nodes, so this is how the element and the position it is anchored at are recovered.
 *
 * Kept internal and surfaced only through the `getDeletedWidgets` plugin action, so consumers never
 * receive the plugin key or the decoration set (which would let them mutate plugin behaviour).
 */
export const getDeletedWidgets = (editorState, range) => {
  var _showDiffPluginKey$ge;
  const decorations = (_showDiffPluginKey$ge = showDiffPluginKey.getState(editorState)) === null || _showDiffPluginKey$ge === void 0 ? void 0 : _showDiffPluginKey$ge.decorations;
  if (!decorations) {
    return [];
  }
  return decorations.find(range === null || range === void 0 ? void 0 : range.from, range === null || range === void 0 ? void 0 : range.to, spec => isDiffDecorationSpec(spec) && spec.decorationType === 'widget').reduce((widgets, decoration) => {
    const element = getWidgetElement(decoration);
    if (element) {
      widgets.push({
        element,
        position: decoration.from
      });
    }
    return widgets;
  }, []).sort((a, b) => a.position - b.position);
};