Function buildMathML_buildExpression

static/katex/katex.js:6975–7015

(expression, options)

 */

var buildMathML_buildExpression = function buildExpression(expression, options) {
  var groups = [];
  var lastGroup;

  for (var i = 0; i < expression.length; i++) {
    var group = buildMathML_buildGroup(expression[i], options);

    if (group instanceof mathMLTree_MathNode && lastGroup instanceof mathMLTree_MathNode) {
      // Concatenate adjacent <mtext>s
      if (group.type === 'mtext' && lastGroup.type === 'mtext' && group.getAttribute('mathvariant') === lastGroup.getAttribute('mathvariant')) {
        var _lastGroup$children;

        (_lastGroup$children = lastGroup.children).push.apply(_lastGroup$children, group.children);

        continue; // Concatenate adjacent <mn>s
      } else if (group.type === 'mn' && lastGroup.type === 'mn') {
        var _lastGroup$children2;

        (_lastGroup$children2 = lastGroup.children).push.apply(_lastGroup$children2, group.children);

        continue; // Concatenate <mn>...</mn> followed by <mi>.</mi>
      } else if (group.type === 'mi' && group.children.length === 1 && lastGroup.type === 'mn') {
        var child = group.children[0];

        if (child instanceof mathMLTree_TextNode && child.text === '.') {
          var _lastGroup$children3;

          (_lastGroup$children3 = lastGroup.children).push.apply(_lastGroup$children3, group.children);

          continue;
        }
      }
    }

    groups.push(group);
    lastGroup = group;
  } // TODO(kevinb): combine \\not with mrels and mords


  return groups;
};
/**
 * Equivalent to buildExpression, but wraps the elements in an <mrow>
 * if there's more than one.  Returns a single node instead of an array.