Function getTXTFromAtext

src/node/utils/ExportTxt.ts:47–263

(pad: PadType, atext: AText, authorColors?:string)

// This is different than the functionality provided in ExportHtml as it provides formatting
// functionality that is designed specifically for TXT exports
const getTXTFromAtext = (pad: PadType, atext: AText, authorColors?:string) => {
  const apool = pad.apool();
  const textLines = atext.text.slice(0, -1).split('\n');
  const attribLines = splitAttributionLines(atext.attribs, atext.text);

  const props = ['heading1', 'heading2', 'bold', 'italic', 'underline', 'strikethrough'];
  const anumMap: MapType = {};
  const css = '';

  props.forEach((propName, i) => {
    // @ts-ignore
    const propTrueNum = apool.putAttrib([propName, true], true);
    if (propTrueNum >= 0) {
      anumMap[propTrueNum] = i;
    }
  });

  const getLineTXT = (text:string, attribs:any) => {
    const propVals:(number|boolean)[] = [false, false, false];
    const ENTER = 1;
    const STAY = 2;
    const LEAVE = 0;

    // Use order of tags (b/i/u) as order of nesting, for simplicity
    // and decent nesting.  For example,
    // <b>Just bold<b> <b><i>Bold and italics</i></b> <i>Just italics</i>
    // becomes
    // <b>Just bold <i>Bold and italics</i></b> <i>Just italics</i>
    const taker = new StringIterator(text);
    const assem = new StringAssembler();

    let idx = 0;

    const processNextChars = (numChars: number) => {
      if (numChars <= 0) {
        return;
      }

      const ops = deserializeOps(subattribution(attribs, idx, idx + numChars));
      idx += numChars;

      for (const o of ops) {
        let propChanged = false;

        for (const a of attributes.decodeAttribString(o.attribs)) {
          if (a in anumMap) {
            const i = anumMap[a] as number; // i = 0 => bold, etc.

            if (!propVals[i]) {
              propVals[i] = ENTER;
              propChanged = true;
            } else {
              propVals[i] = STAY;
            }
          }
        }

        for (let i = 0; i < propVals.length; i++) {