Function fillGrid

src/lib/table/builder.ts:48–85

* Fills the `grid` and `posMap` of a `tableGrid` by traversing a given `TableNode` row. * * This function iterates through a linked list of `TableNode`s, which represents a single row in the * conceptual table. For each node in the row, it calculates the final `x` position and width, then * adds

(tableGrid: TableGrid, node: TableNode, startRow: number)

 * @returns An object containing the final `x` coordinate and the total `sumWidth` of the processed row.
 */
function fillGrid(tableGrid: TableGrid, node: TableNode, startRow: number) {
  let x = node.x;
  let sumWidth = 0;

  // The parent node may be wider than the sum of its child nodes,
  // so the width difference needs to be allocated to the rightmost child node.
  const adjustWidth = (nd: TableNode) => {
    if (nd.parent && nd.borderFlags["right"]) {
      nd.width = nd.parent.x + nd.parent.width - x;
    }
    nd.x = x;
  };

  const accWidth = (w: number) => {
    x += w;
    sumWidth += w;
  };

  for (let current: TableNode | undefined = node; current; current = current.right) {
    if (isTableType(current.type)) {
      adjustWidth(current);
      const head = findHead(current.heads, startRow);

      if (head) {
        head.x = x;
        const sub = fillGrid(tableGrid, head, startRow);
        accWidth(sub.sumWidth);
      }
    } else {
      const nd = current.row === startRow ? current : newDummyNode(current, startRow);
      adjustWidth(nd);
      accWidth(nd.width);
      addCell(tableGrid, nd, startRow);
    }
  }

  return { x, sumWidth };
}

/**
 * A helper function to add a cell to the grid and update the position map.