Convert between paths and indices

Convert between paths and indices

Usage

path_to_index(path, items)

index_to_path(index, items)

paths_to_ranges(path1, path2, items)

get_ranges(items, ranges)

Arguments

path

A vector of integers, assumed to be a path through "ITEMLIST" entries in a LaTeX2 or LaTeX2item object.

items

The referenced object.

index

A scalar integer which would be the index to an item if items was flattened.

path1, path2

Paths into the same destination list.

ranges

A list of LaTeX2range objects, such as that produced by paths_to_ranges().

Value

path_to_index returns a scalar value corresponding the the index if items was flattened.

index_to_path returns a vector of integers which would index the specified item.

paths_to_range returns a list of LaTeX2range objects covering all entries extending from path1 to path2.

get_ranges() extracts the specified ranges, concatenates them, and returns them as a LaTeX2 object.

See also

flatten_itemlists()

Examples

latex <- kableExtra::kbl(mtcars[1:2, 1:2], format = "latex")
parsed <- parseLatex(latex)
tablepath <- path_to(parsed, is_env, envtypes = "tabular")
table <- prepare_table(parsed[[tablepath]])
path_to_index(c(4,1,1), table)
#> [1] 34
index_to_path(3, table)
#> [1] 1 3

ranges <- paths_to_ranges(index_to_path(3, table),
                          c(4,1,1), table)
lapply(ranges, get_range, items = table)
#> [[1]]
#> ]{l|r|r}
#> 
#> [[2]]
#> 
#> \hline
#>   & mpg & cyl\\
#> 
#> [[3]]
#> 
#> \hline
#> Mazda RX4 & 21 & 6\\
#> 
#> [[4]]
#> 
#> 
#> 

get_ranges(table, ranges)
#> ]{l|r|r}
#> \hline
#>   & mpg & cyl\\
#> \hline
#> Mazda RX4 & 21 & 6\\
#>