Matrix Print Form - Intermediate Representation for ASCII Table Printing

This should generally only be called by `matrix_form` custom methods, and almost never from other code.

MatrixPrintForm(
  strings = NULL,
  spans,
  aligns,
  formats,
  row_info,
  line_grouping = seq_len(NROW(strings)),
  ref_fnotes = list(),
  nlines_header,
  nrow_header,
  has_topleft = TRUE,
  has_rowlabs = has_topleft,
  expand_newlines = TRUE,
  main_title = "",
  subtitles = character(),
  page_titles = character(),
  main_footer = "",
  prov_footer = character(),
  col_gap = 3
)

matrix_print_form(
  strings = NULL,
  spans,
  aligns,
  formats,
  row_info,
  line_grouping = seq_len(NROW(strings)),
  ref_fnotes = list(),
  nlines_header,
  nrow_header,
  has_topleft = TRUE,
  has_rowlabs = has_topleft,
  expand_newlines = TRUE,
  main_title = "",
  subtitles = character(),
  page_titles = character(),
  main_footer = "",
  prov_footer = character(),
  col_gap = 3
)

Arguments

strings: character matrix. Matrix of formatted, ready to display strings organized as they will be positioned when rendered. Elements that span more than one column must be followed by the correct number of placeholders (typically either empty strings or repeats of the value).
spans: numeric matrix. Matrix of same dimension as strings giving the spanning information for each element. Must be repeated to match placeholders in strings.
aligns: character matrix. Matrix of same dimension as strings giving the text alignment information for each element. Must be repeated to match placeholders in strings.
formats: matrix. Matrix of same dimension as strings giving the text format information for each element. Must be repeated to match placeholders in strings.
row_info: data.frame. Data.frame with row-information necessary for pagination (XXX document exactly what that is).
line_grouping: integer. Sequence of integers indicating how print lines correspond to semantic rows in the object. Typically this should not be set manually unless expact_newlines is set to FALSE.
ref_fnotes: list. Referential footnote information if applicable.
nlines_header: numeric(1). Number of lines taken up by the values of the header (ie not including the divider).
nrow_header: numeric(1). Number of rows corresponding to the header.
has_topleft: logical(1). Does the corresponding table have 'top left information' which should be treated differently when expanding newlines. Ignored if expand_newlines is FALSE.
has_rowlabs: logical(1). Do the matrices (strings, spans, aligns) each contain a column that corresponds with row labels (Rather than with table cell values). Defaults to TRUE.
expand_newlines: logical(1). Should the matrix form generated expand rows whose values contain newlines into multiple 'physical' rows (as they will appear when rendered into ASCII). Defaults to TRUE
main_title: character(1). Main title as a string.
subtitles: character. Subtitles, as a character vector.
page_titles: character. Page-specific titles, as a character vector.
main_footer: character(1). Main footer as a string.
prov_footer: character. Provenance footer information as a character vector.
col_gap: numeric(1). Space (in characters) between columns

Value

An object of class `MatrixPrintForm`. Currently this is implemented as an S3 class inheriting from list with the following elements:

strings: see argument
spans: see argument
aligns: see argument
display: logical matrix of same dimension as `strings` that specifies whether an element in `strings` will be displayed when the table is rendered
formats: see arugment
row_info: see argument
line_grouping: see argument
ref_footnotes: see argument
main_title: see argument
subtitles: see argument
page_titles: see argument
main_footer: see argument
prov_footer: see argument

as well as the following attributes:

nlines_header: see argument
nrow_header: see argument
ncols: number of columns of the table, not including any row names/row labels