html-to-article-json/dist/normalize/merge-text-nodes.js

Converting HTML to article-json

'use strict';

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

var _textFormattings = require('../text-formattings');

var _textFormattings2 = _interopRequireDefault(_textFormattings);

var _generateFunction = require('generate-function');

var _generateFunction2 = _interopRequireDefault(_generateFunction);

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

var mergeTextNodes = function mergeTextNodes(sameTypeTextNodes, tree) {
  var textNode = void 0;
  var merged = [];

  tree.forEach(function (node) {
    if (node.type === 'text') {
      if (textNode) {
        if (sameTypeTextNodes(textNode, node) && !textNode.mark && !node.mark) {
          textNode.content = textNode.content + node.content;
        } else {
          merged.push(textNode);
          textNode = node;
        }
      } else {
        textNode = node;
      }
    } else {
      if (textNode) {
        merged.push(textNode);
        textNode = null;
      }

      merged.push(node);
    }
  });

  if (textNode) {
    merged.push(textNode);
  }
  return merged;
};

var createSameTypeTextNodes = function createSameTypeTextNodes(textFormattings) {
  var fn = (0, _generateFunction2.default)();
  fn = fn('function (nodeA, nodeB) {');

  fn = fn('return ' + textFormattings.map(function (row) {
    return row.property;
  }).filter(function (property) {
    return property !== 'content';
  }).map(function (property) {
    return 'nodeA[\'' + property + '\'] === nodeB[\'' + property + '\']';
  }).join('&&'));

  fn = fn('}');
  return fn.toFunction();
};

exports.default = function (opts) {
  var textFormattings = (0, _textFormattings2.default)(opts);
  var sameTypeTextNodes = createSameTypeTextNodes(textFormattings);

  return function (tree) {
    tree.forEach(function (node) {
      if (node.children) {
        node.children = mergeTextNodes(sameTypeTextNodes, node.children);
      }
    });
  };
};