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Viewing file:     convertFromDraftStateToRaw.js (4.47 KB)      -rw-r--r--

/**
 * 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
 * 
 * @emails oncall+draft_js
 */
'use strict';

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var ContentBlock = require("./ContentBlock");

var ContentBlockNode = require("./ContentBlockNode");

var DraftStringKey = require("./DraftStringKey");

var encodeEntityRanges = require("./encodeEntityRanges");

var encodeInlineStyleRanges = require("./encodeInlineStyleRanges");

var invariant = require("fbjs/lib/invariant");

var createRawBlock = function createRawBlock(block, entityStorageMap) {
  return {
    key: block.getKey(),
    text: block.getText(),
    type: block.getType(),
    depth: block.getDepth(),
    inlineStyleRanges: encodeInlineStyleRanges(block),
    entityRanges: encodeEntityRanges(block, entityStorageMap),
    data: block.getData().toObject()
  };
};

var insertRawBlock = function insertRawBlock(block, entityMap, rawBlocks, blockCacheRef) {
  if (block instanceof ContentBlock) {
    rawBlocks.push(createRawBlock(block, entityMap));
    return;
  }

  !(block instanceof ContentBlockNode) ? process.env.NODE_ENV !== "production" ? invariant(false, 'block is not a BlockNode') : invariant(false) : void 0;
  var parentKey = block.getParentKey();

  var rawBlock = blockCacheRef[block.getKey()] = _objectSpread({}, createRawBlock(block, entityMap), {
    children: []
  });

  if (parentKey) {
    blockCacheRef[parentKey].children.push(rawBlock);
    return;
  }

  rawBlocks.push(rawBlock);
};

var encodeRawBlocks = function encodeRawBlocks(contentState, rawState) {
  var entityMap = rawState.entityMap;
  var rawBlocks = [];
  var blockCacheRef = {};
  var entityCacheRef = {};
  var entityStorageKey = 0;
  contentState.getBlockMap().forEach(function (block) {
    block.findEntityRanges(function (character) {
      return character.getEntity() !== null;
    }, function (start) {
      var entityKey = block.getEntityAt(start); // Stringify to maintain order of otherwise numeric keys.

      var stringifiedEntityKey = DraftStringKey.stringify(entityKey); // This makes this function resilient to two entities
      // erroneously having the same key

      if (entityCacheRef[stringifiedEntityKey]) {
        return;
      }

      entityCacheRef[stringifiedEntityKey] = entityKey; // we need the `any` casting here since this is a temporary state
      // where we will later on flip the entity map and populate it with
      // real entity, at this stage we just need to map back the entity
      // key used by the BlockNode

      entityMap[stringifiedEntityKey] = "".concat(entityStorageKey);
      entityStorageKey++;
    });
    insertRawBlock(block, entityMap, rawBlocks, blockCacheRef);
  });
  return {
    blocks: rawBlocks,
    entityMap: entityMap
  };
}; // Flip storage map so that our storage keys map to global
// DraftEntity keys.


var encodeRawEntityMap = function encodeRawEntityMap(contentState, rawState) {
  var blocks = rawState.blocks,
      entityMap = rawState.entityMap;
  var rawEntityMap = {};
  Object.keys(entityMap).forEach(function (key, index) {
    var entity = contentState.getEntity(DraftStringKey.unstringify(key));
    rawEntityMap[index] = {
      type: entity.getType(),
      mutability: entity.getMutability(),
      data: entity.getData()
    };
  });
  return {
    blocks: blocks,
    entityMap: rawEntityMap
  };
};

var convertFromDraftStateToRaw = function convertFromDraftStateToRaw(contentState) {
  var rawDraftContentState = {
    entityMap: {},
    blocks: []
  }; // add blocks

  rawDraftContentState = encodeRawBlocks(contentState, rawDraftContentState); // add entities

  rawDraftContentState = encodeRawEntityMap(contentState, rawDraftContentState);
  return rawDraftContentState;
};

module.exports = convertFromDraftStateToRaw;