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//! The module contains a set of methods to merge cells together via [`Span`]s.
//!
//! [`Span`]: crate::Span
use crate::{papergrid::records::Records, Table, TableOption};
/// Merge to combine duplicates together, using [`Span`].
///
/// [`Span`]: crate::Span
#[derive(Debug)]
pub struct Merge;
impl Merge {
/// Vertical merge.
pub fn vertical() -> MergeDuplicatesVertical {
MergeDuplicatesVertical
}
/// Horizontal merge.
pub fn horizontal() -> MergeDuplicatesHorizontal {
MergeDuplicatesHorizontal
}
}
/// A modificator for [`Table`] which looks up for duplicates in columns and
/// in case of duplicate merges the cells together using [`Span`].
///
/// [`Table`]: crate::Table
/// [`Span`]: crate::Span
#[derive(Debug)]
pub struct MergeDuplicatesVertical;
impl<R> TableOption<R> for MergeDuplicatesVertical
where
R: Records,
{
fn change(&mut self, table: &mut Table<R>) {
if table.is_empty() {
return;
}
for column in 0..table.get_records().count_columns() {
let mut repeat_length = 0;
let mut repeat_value = String::new();
let mut repeat_is_set = false;
let mut last_is_row_span = false;
for row in (0..table.get_records().count_rows()).rev() {
if last_is_row_span {
last_is_row_span = false;
continue;
}
// we need to mitigate messing existing spans
let is_cell_visible = table
.get_config()
.is_cell_visible((row, column), table.shape());
let is_row_span_cell = table
.get_config()
.get_column_span((row, column), table.shape())
.is_some();
if !repeat_is_set {
if !is_cell_visible {
continue;
}
if is_row_span_cell {
continue;
}
repeat_length = 1;
repeat_value = table.get_records().get_text((row, column)).to_owned();
repeat_is_set = true;
continue;
}
if is_row_span_cell {
repeat_is_set = false;
last_is_row_span = true;
continue;
}
if !is_cell_visible {
repeat_is_set = false;
continue;
}
let text = table.get_records().get_text((row, column));
let is_duplicate = text == repeat_value;
if is_duplicate {
repeat_length += 1;
continue;
}
if repeat_length > 1 {
table
.get_config_mut()
.set_row_span((row + 1, column), repeat_length);
}
repeat_length = 1;
repeat_value = table.get_records().get_text((row, column)).to_owned();
}
if repeat_length > 1 {
table
.get_config_mut()
.set_row_span((0, column), repeat_length);
}
}
table.destroy_width_cache();
table.destroy_height_cache();
}
}
/// A modificator for [`Table`] which looks up for duplicates in rows and
/// in case of duplicate merges the cells together using [`Span`].
///
/// [`Table`]: crate::Table
/// [`Span`]: crate::Span
#[derive(Debug)]
pub struct MergeDuplicatesHorizontal;
impl<R> TableOption<R> for MergeDuplicatesHorizontal
where
R: Records,
{
fn change(&mut self, table: &mut Table<R>) {
if table.is_empty() {
return;
}
for row in 0..table.get_records().count_rows() {
let mut repeat_length = 0;
let mut repeat_value = String::new();
let mut repeat_is_set = false;
let mut last_is_col_span = false;
for column in (0..table.get_records().count_columns()).rev() {
if last_is_col_span {
last_is_col_span = false;
continue;
}
// we need to mitigate messing existing spans
let is_cell_visible = table
.get_config()
.is_cell_visible((row, column), table.shape());
let is_col_span_cell = table
.get_config()
.get_row_span((row, column), table.shape())
.is_some();
if !repeat_is_set {
if !is_cell_visible {
continue;
}
if is_col_span_cell {
continue;
}
repeat_length = 1;
repeat_value = table.get_records().get_text((row, column)).to_owned();
repeat_is_set = true;
continue;
}
if is_col_span_cell {
repeat_is_set = false;
last_is_col_span = true;
continue;
}
if !is_cell_visible {
repeat_is_set = false;
continue;
}
let text = table.get_records().get_text((row, column));
let is_duplicate = text == repeat_value;
if is_duplicate {
repeat_length += 1;
continue;
}
if repeat_length > 1 {
table
.get_config_mut()
.set_column_span((row, column + 1), repeat_length);
}
repeat_length = 1;
repeat_value = table.get_records().get_text((row, column)).to_owned();
}
if repeat_length > 1 {
table
.get_config_mut()
.set_column_span((row, 0), repeat_length);
}
}
table.destroy_width_cache();
table.destroy_height_cache();
}
}