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Viewing file:     DraftTreeAdapter.js (5.33 KB)      -rw-r--r--

"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; }

/**
 * 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
 *
 * This is unstable and not part of the public API and should not be used by
 * production systems. This file may be update/removed without notice.
 */
var generateRandomKey = require("./generateRandomKey");

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

var traverseInDepthOrder = function traverseInDepthOrder(blocks, fn) {
  var stack = [].concat(blocks).reverse();

  while (stack.length) {
    var _block = stack.pop();

    fn(_block);
    var children = _block.children;
    !Array.isArray(children) ? process.env.NODE_ENV !== "production" ? invariant(false, 'Invalid tree raw block') : invariant(false) : void 0;
    stack = stack.concat([].concat(children.reverse()));
  }
};

var isListBlock = function isListBlock(block) {
  if (!(block && block.type)) {
    return false;
  }

  var type = block.type;
  return type === 'unordered-list-item' || type === 'ordered-list-item';
};

var addDepthToChildren = function addDepthToChildren(block) {
  if (Array.isArray(block.children)) {
    block.children = block.children.map(function (child) {
      return child.type === block.type ? _objectSpread({}, child, {
        depth: (block.depth || 0) + 1
      }) : child;
    });
  }
};
/**
 * This adapter is intended to be be used as an adapter to draft tree data
 *
 * draft state <=====> draft tree state
 */


var DraftTreeAdapter = {
  /**
   * Converts from a tree raw state back to draft raw state
   */
  fromRawTreeStateToRawState: function fromRawTreeStateToRawState(draftTreeState) {
    var blocks = draftTreeState.blocks;
    var transformedBlocks = [];
    !Array.isArray(blocks) ? process.env.NODE_ENV !== "production" ? invariant(false, 'Invalid raw state') : invariant(false) : void 0;

    if (!Array.isArray(blocks) || !blocks.length) {
      return draftTreeState;
    }

    traverseInDepthOrder(blocks, function (block) {
      var newBlock = _objectSpread({}, block);

      if (isListBlock(block)) {
        newBlock.depth = newBlock.depth || 0;
        addDepthToChildren(block); // if it's a non-leaf node, we don't do anything else

        if (block.children != null && block.children.length > 0) {
          return;
        }
      }

      delete newBlock.children;
      transformedBlocks.push(newBlock);
    });
    draftTreeState.blocks = transformedBlocks;
    return _objectSpread({}, draftTreeState, {
      blocks: transformedBlocks
    });
  },

  /**
   * Converts from draft raw state to tree draft state
   */
  fromRawStateToRawTreeState: function fromRawStateToRawTreeState(draftState) {
    var transformedBlocks = [];
    var parentStack = [];
    draftState.blocks.forEach(function (block) {
      var isList = isListBlock(block);
      var depth = block.depth || 0;

      var treeBlock = _objectSpread({}, block, {
        children: []
      });

      if (!isList) {
        transformedBlocks.push(treeBlock);
        return;
      }

      var lastParent = parentStack[0]; // block is non-nested & there are no nested blocks, directly push block

      if (lastParent == null && depth === 0) {
        transformedBlocks.push(treeBlock); // block is first nested block or previous nested block is at a lower level
      } else if (lastParent == null || lastParent.depth < depth - 1) {
        // create new parent block
        var newParent = {
          key: generateRandomKey(),
          text: '',
          depth: depth - 1,
          type: block.type,
          children: [],
          entityRanges: [],
          inlineStyleRanges: []
        };
        parentStack.unshift(newParent);

        if (depth === 1) {
          // add as a root-level block
          transformedBlocks.push(newParent);
        } else if (lastParent != null) {
          // depth > 1 => also add as previous parent's child
          lastParent.children.push(newParent);
        }

        newParent.children.push(treeBlock);
      } else if (lastParent.depth === depth - 1) {
        // add as child of last parent
        lastParent.children.push(treeBlock);
      } else {
        // pop out parents at levels above this one from the parent stack
        while (lastParent != null && lastParent.depth >= depth) {
          parentStack.shift();
          lastParent = parentStack[0];
        }

        if (depth > 0) {
          lastParent.children.push(treeBlock);
        } else {
          transformedBlocks.push(treeBlock);
        }
      }
    });
    return _objectSpread({}, draftState, {
      blocks: transformedBlocks
    });
  }
};
module.exports = DraftTreeAdapter;