@atlaskit/editor-plugin-show-diff/dist/es2019/pm-plugins/calculateDiff/smart/thresholds.js

ShowDiff plugin for @atlaskit/editor-core

/**
 * Configurable thresholds for the `smart` diffType.
 *
 * See docs/smart-diff-design.md §3 and §6 for the exact semantics of each level.
 */

export const DEFAULT_SMART_THRESHOLDS = {
  sentence: {
    ratio: 0.4,
    minChanged: 2
  },
  paragraph: {
    ratio: 0.4,
    minChanged: 2
  },
  node: {
    ratio: 0.6,
    textBearingRatio: 0.6
  }
};

/**
 * Merge caller overrides onto the defaults. Overrides are shallow-merged per level so a
 * caller can tune a single field (e.g. only `sentence.ratio`) without re-specifying the
 * rest.
 */
export const resolveThresholds = overrides => {
  if (!overrides) {
    return DEFAULT_SMART_THRESHOLDS;
  }
  return {
    sentence: {
      ...DEFAULT_SMART_THRESHOLDS.sentence,
      ...overrides.sentence
    },
    paragraph: {
      ...DEFAULT_SMART_THRESHOLDS.paragraph,
      ...overrides.paragraph
    },
    node: {
      ...DEFAULT_SMART_THRESHOLDS.node,
      ...overrides.node
    }
  };
};