redraft/lib/withDecorators.js

Renders the result of Draft.js convertToRaw using provided callbacks, works well with React

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _punycode = require('punycode');

var _punycode2 = _interopRequireDefault(_punycode);

var _CompositeDecorator = require('./helpers/CompositeDecorator');

var _CompositeDecorator2 = _interopRequireDefault(_CompositeDecorator);

var _MultiDecorator = require('./helpers/MultiDecorator');

var _MultiDecorator2 = _interopRequireDefault(_MultiDecorator);

var _stubContentBlock = require('./helpers/stubContentBlock');

var _stubContentBlock2 = _interopRequireDefault(_stubContentBlock);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

/**
 * Use CompositeDecorator to build decoratorRanges with ranges, components, and props
 */

// This offsets or rather recalculates ranges for decorators
// with punycode.ucs2.decode
var offsetRanges = function offsetRanges(ranges, block) {
  // if there are no decorator skip this step
  ranges.forEach(function (range) {
    var pre = block.text.substring(0, range.offset);
    var decorated = block.text.substring(range.offset, range.offset + range.length);
    // eslint-disable-next-line no-param-reassign
    range.offset = _punycode2.default.ucs2.decode(pre).length;
    // eslint-disable-next-line no-param-reassign
    range.length = _punycode2.default.ucs2.decode(decorated).length;
  });
  return ranges;
};
// Return true if decorator implements the DraftDecoratorType interface
// @see https://github.com/facebook/draft-js/blob/master/src/model/decorators/DraftDecoratorType.js
var decoratorIsCustom = function decoratorIsCustom(decorator) {
  return typeof decorator.getDecorations === 'function' && typeof decorator.getComponentForKey === 'function' && typeof decorator.getPropsForKey === 'function';
};

var resolveDecorators = function resolveDecorators(decorators) {
  var compositeDecorator = new _CompositeDecorator2.default(decorators.filter(function (decorator) {
    return !decoratorIsCustom(decorator);
  }));

  var customDecorators = decorators.filter(function (decorator) {
    return decoratorIsCustom(decorator);
  });
  var decor = [].concat(_toConsumableArray(customDecorators), [compositeDecorator]);
  return new _MultiDecorator2.default(decor);
};

var decorateBlock = function decorateBlock(block, decorators, contentState, _ref) {
  var createContentBlock = _ref.createContentBlock;

  var decoratorRanges = [];
  // create a Decorator instance
  var decorator = resolveDecorators(decorators);
  // create ContentBlock or a stub
  var contentBlock = createContentBlock ? createContentBlock(block) : (0, _stubContentBlock2.default)(block);
  // Get decorations from CompositeDecorator instance
  var decorations = decorator.getDecorations(contentBlock, contentState);
  // Keep track of offset for current key
  var offset = 0;
  decorations.forEach(function (key, index) {
    // If no key just move the offset
    if (!key) {
      offset += 1;
      return;
    }
    // get next key
    var nextIndex = index + 1;
    var next = decorations[nextIndex];
    // if thers no next key or the key chages build a decoratorRange entry
    if (!next || next !== key) {
      decoratorRanges.push({
        offset: offset,
        length: nextIndex - offset,
        component: decorator.getComponentForKey(key),
        decoratorProps: decorator.getPropsForKey(key) || {},
        // save reference to contentState
        contentState: contentState
      });
      // reset the offset to next index
      offset = nextIndex;
    }
  });
  // merge the block with decoratorRanges
  return Object.assign({}, block, {
    decoratorRanges: offsetRanges(decoratorRanges, block)
  });
};

var withDecorators = function withDecorators(raw, decorators, options) {
  var contentState = options.convertFromRaw && options.convertFromRaw(raw);
  return raw.blocks.map(function (block) {
    return decorateBlock(block, decorators, contentState, options || {});
  });
};

exports.default = withDecorators;