Function domAndRepSplice

src/static/js/ace2_inner.ts:1419–1452

(startLine, deleteCount, newLineStrings)

  const performDocumentApplyChangeset = (changes, insertsAfterSelection) => {
    const domAndRepSplice = (startLine, deleteCount, newLineStrings) => {
      const keysToDelete = [];
      if (deleteCount > 0) {
        let entryToDelete = rep.lines.atIndex(startLine);
        for (let i = 0; i < deleteCount; i++) {
          keysToDelete.push(entryToDelete.key);
          entryToDelete = rep.lines.next(entryToDelete);
        }
      }

      const lineEntries = newLineStrings.map(createDomLineEntry);

      doRepLineSplice(startLine, deleteCount, lineEntries);

      let nodeToAddAfter;
      if (startLine > 0) {
        nodeToAddAfter = getCleanNodeByKey(rep.lines.atIndex(startLine - 1).key);
      } else { nodeToAddAfter = null; }

      insertDomLines(nodeToAddAfter, lineEntries.map((entry) => entry.domInfo));

      for (const k of keysToDelete) {
        const n = targetDoc.getElementById(k);
        n.parentNode.removeChild(n);
      }

      if (
        (rep.selStart &&
          rep.selStart[0] >= startLine &&
          rep.selStart[0] <= startLine + deleteCount) ||
         (rep.selEnd && rep.selEnd[0] >= startLine && rep.selEnd[0] <= startLine + deleteCount)) {
        currentCallStack.selectionAffected = true;
      }
    };

    doRepApplyChangeset(changes, insertsAfterSelection);