recursiveProcessPureText.js

import replaceTagWithSymbol from "./replaceTagWithSymbol";

const recursiveProcessPureTextDefault = { removeNewline: false, type: false };

const recursiveProcessPureText = (
  node,
  writeTo,
  options = recursiveProcessPureTextDefault
) => {
  if (!node) return;

  if (
    !replaceTagWithSymbol(node, writeTo, options.type) &&
    node.nodeName === "#text"
  ) {
    let value = node.nodeValue;
    if (options.removeNewline == "beginning&end") {
      value = value.replace(/^[\r\n]+/g, "");
      value = value.replace(/[\r\n\s]+$/g, "");
    }
    if (options.removeNewline == "all") {
      value = value.replace(/[\r\n]+/g, " ");
    }
    if (options.escapeCurlyBracket) {
      value = value.replace(/\{/g, "\\{");
      value = value.replace(/\}/g, "\\}");
    }
    /// \OptionalPar[n]{...} ===> \textit{...}_{n}
    value = value.replace(
      /\\OptionalPar\[(.)\]{(.*?)}/g,
      "\\ensuremath{\\text{\\textrm{\\sl $2}}_{$1}}"
    );
    /// \OptionalPar{...} ===> \textit{...}
    value = value.replace(
      /\\OptionalPar{(.*?)}/g,
      "\\ensuremath{\\text{\\textrm{\\sl $1}}}"
    );
    writeTo.push(value);
  }
  return recursiveProcessPureText(node.nextSibling, writeTo, options);
};

export default recursiveProcessPureText;