Function processNextChars

src/node/utils/ExportTxt.ts:80–179

(numChars: number)

    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++) {
          if (propVals[i] === true) {
            propVals[i] = LEAVE;
            propChanged = true;
          } else if (propVals[i] === STAY) {
            // set it back
            propVals[i] = true;
          }
        }

        // now each member of propVal is in {false,LEAVE,ENTER,true}
        // according to what happens at start of span
        if (propChanged) {
          // leaving bold (e.g.) also leaves italics, etc.
          let left = false;

          for (let i = 0; i < propVals.length; i++) {
            const v = propVals[i];

            if (!left) {
              if (v === LEAVE) {
                left = true;
              }
            } else if (v === true) {
              // tag will be closed and re-opened
              propVals[i] = STAY;
            }
          }

          const tags2close = [];

          for (let i = propVals.length - 1; i >= 0; i--) {
            if (propVals[i] === LEAVE) {
              // emitCloseTag(i);