How can I iterate over all cells of a table in a show rule?

Questions
1

Dear all,

as the title says, I would like to iterate over all cells of a table in a show rule. That is:

#show table: it => {
  for child in it.children {
    if (WHAT DO I NEED TO WRITE HERE TO CHECK IF CHILD IS A CELL?) {
      /* Read the text from the body of the cell and do something with it. */
    }
  }
}

#table(
  columns: (auto, auto, 1fr, auto, auto),
  align: horizon,
  table.header(
    repeat: true
  )[Head 1][Head 2][Head 3][Head 4][Head 5]
)[1][2][3][4][5]


What if condition should I use to check whether the child is a cell?

A few additional remarks:

  • I am aware that I actually need to go recursively through all children to iterate over all cells. But that’s not my problem. My problem is that for the life of me I can’t find out how to check whether or not a child is a cell. Once I know that, implementing the recursion should be easy.
  • Of course, I would be open to other solutions. For example, I tried to select all cells with a selector, but without avail. Either that’s not possible, or I have been too silly to find out the correct way. With other selectors, I had no problems, though. I’ll be happy with every method that enables me to iterate over all cells of a table in a #show rule. It doesn’t need to be a recursive scan through all children.
  • There are some questions (along with answers) in this forum and elsewhere about how to automatically fill table cells with content (for example, from a CSV file). But I’d like to have it the other way around. I’d like to read the content of the cells.

Thank you very much in advance!

2

You were pretty close ;)

The table.cell values can be accessed via table.fields().children

Just try this and look at the output:

#table(
  columns: (auto, auto, 1fr, auto, auto),
  align: horizon,
  table.header(repeat: true,)[Head 1][Head 2][Head 3][Head 4][Head 5],
)[1][2][3][4][5].fields().children

There are a few examples on this forum, like Is it possible to have a function in set rule that are inside a show rule? - #16 by bluss

For your case, probably something like this:

#show table: it => {
  // Prevent infinite recursion
  if (it.has("label") and it.label == <table-style-done>) {
    it
  } else {
    let fields = it.fields()
    let children = fields.remove("children")
    let new-children = ()

    for child in children {
      if child.func() == table.cell {
        // Table cell
        new-children.push([_Modified_ #child])
      } else {
        // Table headers (array)
        new-children.push(child)
      }
    }
    // Recreate and return the table
    [#table(..fields, ..new-children)<table-style-done>]
  }
}
3

I see. child.func() was the key to solving the problem.

Now I have to find out how I can determine in which column a cell is. If I get stuck again, I’ll open a new question.

Thank you very much!

1 Like
4

Your use case has been very vague so far, but you may want to look at

#show table.cell.where(x: 1, y: 0): strong

Otherwise knowing the number of columns, you can keep a counter when iterating on the cells.