nushell/crates/nu-table/src/table.rs

1265 lines
37 KiB
Rust
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2021-09-10 04:27:12 +02:00
use crate::wrap::{column_width, split_sublines, wrap, Alignment, Subline, WrappedCell};
use nu_ansi_term::{Color, Style};
use std::collections::HashMap;
use std::fmt::Write;
enum SeparatorPosition {
Top,
Middle,
Bottom,
}
#[derive(Debug)]
pub struct Table {
pub headers: Vec<StyledString>,
pub data: Vec<Vec<StyledString>>,
pub theme: Theme,
}
#[derive(Debug, Clone)]
pub struct StyledString {
pub contents: String,
pub style: TextStyle,
}
impl StyledString {
pub fn new(contents: String, style: TextStyle) -> StyledString {
StyledString { contents, style }
}
pub fn set_style(&mut self, style: TextStyle) {
self.style = style;
}
}
#[derive(Debug, Clone, Copy)]
pub struct TextStyle {
pub alignment: Alignment,
pub color_style: Option<Style>,
}
impl TextStyle {
pub fn new() -> TextStyle {
TextStyle {
alignment: Alignment::Left,
color_style: Some(Style::default()),
}
}
pub fn bold(&self, bool_value: Option<bool>) -> TextStyle {
let bv = bool_value.unwrap_or(false);
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_bold: bv,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_bold(&self) -> bool {
self.color_style.unwrap_or_default().is_bold
}
pub fn dimmed(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_dimmed: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_dimmed(&self) -> bool {
self.color_style.unwrap_or_default().is_dimmed
}
pub fn italic(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_italic: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_italic(&self) -> bool {
self.color_style.unwrap_or_default().is_italic
}
pub fn underline(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_underline: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_underline(&self) -> bool {
self.color_style.unwrap_or_default().is_underline
}
pub fn blink(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_blink: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_blink(&self) -> bool {
self.color_style.unwrap_or_default().is_blink
}
pub fn reverse(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_reverse: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_reverse(&self) -> bool {
self.color_style.unwrap_or_default().is_reverse
}
pub fn hidden(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_hidden: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_hidden(&self) -> bool {
self.color_style.unwrap_or_default().is_hidden
}
pub fn strikethrough(&self) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
is_strikethrough: true,
..self.color_style.unwrap_or_default()
}),
}
}
pub fn is_strikethrough(&self) -> bool {
self.color_style.unwrap_or_default().is_strikethrough
}
pub fn fg(&self, foreground: Color) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
foreground: Some(foreground),
..self.color_style.unwrap_or_default()
}),
}
}
pub fn on(&self, background: Color) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
background: Some(background),
..self.color_style.unwrap_or_default()
}),
}
}
pub fn bg(&self, background: Color) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
background: Some(background),
..self.color_style.unwrap_or_default()
}),
}
}
pub fn alignment(&self, align: Alignment) -> TextStyle {
TextStyle {
alignment: align,
color_style: self.color_style,
}
}
pub fn style(&self, style: Style) -> TextStyle {
TextStyle {
alignment: self.alignment,
color_style: Some(Style {
foreground: style.foreground,
background: style.background,
is_bold: style.is_bold,
is_dimmed: style.is_dimmed,
is_italic: style.is_italic,
is_underline: style.is_underline,
is_blink: style.is_blink,
is_reverse: style.is_reverse,
is_hidden: style.is_hidden,
is_strikethrough: style.is_strikethrough,
}),
}
}
pub fn basic_center() -> TextStyle {
TextStyle::new()
.alignment(Alignment::Center)
.style(Style::default())
}
pub fn basic_right() -> TextStyle {
TextStyle::new()
.alignment(Alignment::Right)
.style(Style::default())
}
pub fn basic_left() -> TextStyle {
TextStyle::new()
.alignment(Alignment::Left)
.style(Style::default())
}
pub fn default_header() -> TextStyle {
TextStyle::new()
.alignment(Alignment::Center)
.fg(Color::Green)
.bold(Some(true))
}
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pub fn default_field() -> TextStyle {
TextStyle::new().fg(Color::Green).bold(Some(true))
}
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pub fn with_attributes(bo: bool, al: Alignment, co: Color) -> TextStyle {
TextStyle::new().alignment(al).fg(co).bold(Some(bo))
}
pub fn with_style(al: Alignment, style: Style) -> TextStyle {
TextStyle::new().alignment(al).style(Style {
foreground: style.foreground,
background: style.background,
is_bold: style.is_bold,
is_dimmed: style.is_dimmed,
is_italic: style.is_italic,
is_underline: style.is_underline,
is_blink: style.is_blink,
is_reverse: style.is_reverse,
is_hidden: style.is_hidden,
is_strikethrough: style.is_strikethrough,
})
}
}
impl Default for TextStyle {
fn default() -> Self {
Self::new()
}
}
#[derive(Debug, Clone)]
pub struct Theme {
pub top_left: char,
pub middle_left: char,
pub bottom_left: char,
pub top_center: char,
pub center: char,
pub bottom_center: char,
pub top_right: char,
pub middle_right: char,
pub bottom_right: char,
pub top_horizontal: char,
pub middle_horizontal: char,
pub bottom_horizontal: char,
pub left_vertical: char,
pub center_vertical: char,
pub right_vertical: char,
pub separate_header: bool,
pub separate_rows: bool,
pub print_left_border: bool,
pub print_right_border: bool,
pub print_top_border: bool,
pub print_bottom_border: bool,
}
impl Theme {
#[allow(unused)]
pub fn basic() -> Theme {
Theme {
top_left: '+',
middle_left: '+',
bottom_left: '+',
top_center: '+',
center: '+',
bottom_center: '+',
top_right: '+',
middle_right: '+',
bottom_right: '+',
top_horizontal: '-',
middle_horizontal: '-',
bottom_horizontal: '-',
left_vertical: '|',
center_vertical: '|',
right_vertical: '|',
separate_header: true,
separate_rows: true,
print_left_border: true,
print_right_border: true,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn thin() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: '',
center_vertical: '',
right_vertical: '',
separate_header: true,
separate_rows: true,
print_left_border: true,
print_right_border: true,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn light() -> Theme {
Theme {
top_left: ' ',
middle_left: '',
bottom_left: ' ',
top_center: ' ',
center: '',
bottom_center: ' ',
top_right: ' ',
middle_right: '',
bottom_right: ' ',
top_horizontal: ' ',
middle_horizontal: '',
bottom_horizontal: ' ',
left_vertical: ' ',
center_vertical: ' ',
right_vertical: ' ',
separate_header: true,
separate_rows: false,
print_left_border: true,
print_right_border: true,
print_top_border: false,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn compact() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: ' ',
center_vertical: '',
right_vertical: ' ',
separate_header: true,
separate_rows: false,
print_left_border: false,
print_right_border: false,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn with_love() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: ' ',
center_vertical: '',
right_vertical: ' ',
separate_header: true,
separate_rows: false,
print_left_border: false,
print_right_border: false,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn compact_double() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: ' ',
center_vertical: '',
right_vertical: ' ',
separate_header: true,
separate_rows: false,
print_left_border: false,
print_right_border: false,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn rounded() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: '',
center_vertical: '',
right_vertical: '',
separate_header: true,
separate_rows: false,
print_left_border: true,
print_right_border: true,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn reinforced() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: '',
center_vertical: '',
right_vertical: '',
separate_header: true,
separate_rows: false,
print_left_border: true,
print_right_border: true,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn heavy() -> Theme {
Theme {
top_left: '',
middle_left: '',
bottom_left: '',
top_center: '',
center: '',
bottom_center: '',
top_right: '',
middle_right: '',
bottom_right: '',
top_horizontal: '',
middle_horizontal: '',
bottom_horizontal: '',
left_vertical: '',
center_vertical: '',
right_vertical: '',
separate_header: true,
separate_rows: false,
print_left_border: true,
print_right_border: true,
print_top_border: true,
print_bottom_border: true,
}
}
#[allow(unused)]
pub fn none() -> Theme {
Theme {
top_left: ' ',
middle_left: ' ',
bottom_left: ' ',
top_center: ' ',
center: ' ',
bottom_center: ' ',
top_right: ' ',
middle_right: ' ',
bottom_right: ' ',
top_horizontal: ' ',
middle_horizontal: ' ',
bottom_horizontal: ' ',
left_vertical: ' ',
center_vertical: ' ',
right_vertical: ' ',
separate_header: false,
separate_rows: false,
print_left_border: false,
print_right_border: false,
print_top_border: false,
print_bottom_border: false,
}
}
}
impl Table {
pub fn new(headers: Vec<StyledString>, data: Vec<Vec<StyledString>>, theme: Theme) -> Table {
Table {
headers,
data,
theme,
}
}
}
#[derive(Debug)]
pub struct ProcessedTable<'a> {
pub headers: Vec<ProcessedCell<'a>>,
pub data: Vec<Vec<ProcessedCell<'a>>>,
pub theme: Theme,
}
#[derive(Debug)]
pub struct ProcessedCell<'a> {
pub contents: Vec<Vec<Subline<'a>>>,
pub style: TextStyle,
}
#[derive(Debug)]
pub struct WrappedTable {
pub column_widths: Vec<usize>,
pub headers: Vec<WrappedCell>,
pub data: Vec<Vec<WrappedCell>>,
pub theme: Theme,
}
impl WrappedTable {
fn print_separator(
&self,
separator_position: SeparatorPosition,
color_hm: &HashMap<String, Style>,
) -> String {
let column_count = self.column_widths.len();
let mut output = String::new();
let sep_color = color_hm
.get("separator_color")
.unwrap_or(&Style::default())
.to_owned();
match separator_position {
SeparatorPosition::Top => {
for column in self.column_widths.iter().enumerate() {
if column.0 == 0 && self.theme.print_left_border {
output.push_str(
&sep_color
.paint(&self.theme.top_left.to_string())
.to_string(),
);
}
for _ in 0..*column.1 {
output.push_str(
&sep_color
.paint(&self.theme.top_horizontal.to_string())
.to_string(),
);
}
output.push_str(
&sep_color
.paint(&self.theme.top_horizontal.to_string())
.to_string(),
);
output.push_str(
&sep_color
.paint(&self.theme.top_horizontal.to_string())
.to_string(),
);
if column.0 == column_count - 1 {
if self.theme.print_right_border {
output.push_str(
&sep_color
.paint(&self.theme.top_right.to_string())
.to_string(),
);
}
} else {
output.push_str(
&sep_color
.paint(&self.theme.top_center.to_string())
.to_string(),
);
}
}
output.push('\n');
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}
SeparatorPosition::Middle => {
for column in self.column_widths.iter().enumerate() {
if column.0 == 0 && self.theme.print_left_border {
output.push_str(
&sep_color
.paint(&self.theme.middle_left.to_string())
.to_string(),
);
}
for _ in 0..*column.1 {
output.push_str(
&sep_color
.paint(&self.theme.middle_horizontal.to_string())
.to_string(),
);
}
output.push_str(
&sep_color
.paint(&self.theme.middle_horizontal.to_string())
.to_string(),
);
output.push_str(
&sep_color
.paint(&self.theme.middle_horizontal.to_string())
.to_string(),
);
if column.0 == column_count - 1 {
if self.theme.print_right_border {
output.push_str(
&sep_color
.paint(&self.theme.middle_right.to_string())
.to_string(),
);
}
} else {
output
.push_str(&sep_color.paint(&self.theme.center.to_string()).to_string());
}
}
output.push('\n');
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}
SeparatorPosition::Bottom => {
for column in self.column_widths.iter().enumerate() {
if column.0 == 0 && self.theme.print_left_border {
output.push_str(
&sep_color
.paint(&self.theme.bottom_left.to_string())
.to_string(),
);
}
for _ in 0..*column.1 {
output.push_str(
&sep_color
.paint(&self.theme.bottom_horizontal.to_string())
.to_string(),
);
}
output.push_str(
&sep_color
.paint(&self.theme.bottom_horizontal.to_string())
.to_string(),
);
output.push_str(
&sep_color
.paint(&self.theme.bottom_horizontal.to_string())
.to_string(),
);
if column.0 == column_count - 1 {
if self.theme.print_right_border {
output.push_str(
&sep_color
.paint(&self.theme.bottom_right.to_string())
.to_string(),
);
}
} else {
output.push_str(
&sep_color
.paint(&self.theme.bottom_center.to_string())
.to_string(),
);
}
}
}
}
output
}
fn print_cell_contents(
&self,
cells: &[WrappedCell],
color_hm: &HashMap<String, Style>,
) -> String {
let sep_color = color_hm
.get("separator_color")
.unwrap_or(&Style::default())
.to_owned();
let mut total_output = String::new();
for current_line in 0.. {
let mut lines_printed = 0;
let mut output = String::new();
if self.theme.print_left_border {
output.push_str(
&sep_color
.paint(&self.theme.left_vertical.to_string())
.to_string(),
);
}
for column in cells.iter().enumerate() {
if let Some(line) = (column.1).lines.get(current_line) {
let remainder = self.column_widths[column.0] - line.width;
output.push(' ');
match column.1.style.alignment {
Alignment::Left => {
if let Some(color) = column.1.style.color_style {
output.push_str(&color.paint(&line.line).to_string());
} else {
output.push_str(&line.line);
}
for _ in 0..remainder {
output.push(' ');
}
}
Alignment::Center => {
for _ in 0..remainder / 2 {
output.push(' ');
}
if let Some(color) = column.1.style.color_style {
output.push_str(&color.paint(&line.line).to_string());
} else {
output.push_str(&line.line);
}
for _ in 0..(remainder / 2 + remainder % 2) {
output.push(' ');
}
}
Alignment::Right => {
for _ in 0..remainder {
output.push(' ');
}
if let Some(color) = column.1.style.color_style {
output.push_str(&color.paint(&line.line).to_string());
} else {
output.push_str(&line.line);
}
}
}
output.push(' ');
lines_printed += 1;
} else {
for _ in 0..self.column_widths[column.0] + 2 {
output.push(' ');
}
}
if column.0 < cells.len() - 1 {
output.push_str(
&sep_color
.paint(&self.theme.center_vertical.to_string())
.to_string(),
);
} else if self.theme.print_right_border {
output.push_str(
&sep_color
.paint(&self.theme.right_vertical.to_string())
.to_string(),
);
}
}
if lines_printed == 0 {
break;
}
writeln!(&mut total_output, "{}", output).unwrap();
}
total_output
}
fn print_table(&self, color_hm: &HashMap<String, Style>) -> String {
let mut output = String::new();
#[cfg(windows)]
{
let _ = nu_ansi_term::enable_ansi_support();
}
if self.data.is_empty() {
return output;
}
if self.theme.print_top_border {
output.push_str(&self.print_separator(SeparatorPosition::Top, color_hm));
}
let skip_headers = (self.headers.len() == 2 && self.headers[1].max_width == 0)
|| (self.headers.len() == 1 && self.headers[0].max_width == 0);
if !self.headers.is_empty() && !skip_headers {
output.push_str(&self.print_cell_contents(&self.headers, color_hm));
}
let mut first_row = true;
for row in &self.data {
if !first_row {
if self.theme.separate_rows {
output.push_str(&self.print_separator(SeparatorPosition::Middle, color_hm));
}
} else {
first_row = false;
if self.theme.separate_header && !self.headers.is_empty() && !skip_headers {
output.push_str(&self.print_separator(SeparatorPosition::Middle, color_hm));
}
}
output.push_str(&self.print_cell_contents(row, color_hm));
}
if self.theme.print_bottom_border {
output.push_str(&self.print_separator(SeparatorPosition::Bottom, color_hm));
}
output
}
}
fn process_table(table: &Table) -> ProcessedTable {
let mut processed_data = vec![];
for row in &table.data {
let mut out_row = vec![];
for column in row {
out_row.push(ProcessedCell {
contents: split_sublines(&column.contents),
style: column.style,
});
}
processed_data.push(out_row);
}
let mut processed_headers = vec![];
for header in &table.headers {
processed_headers.push(ProcessedCell {
contents: split_sublines(&header.contents),
style: header.style,
});
}
ProcessedTable {
headers: processed_headers,
data: processed_data,
theme: table.theme.clone(),
}
}
fn get_max_column_widths(processed_table: &ProcessedTable) -> Vec<usize> {
use std::cmp::max;
let mut max_num_columns = 0;
max_num_columns = max(max_num_columns, processed_table.headers.len());
for row in &processed_table.data {
max_num_columns = max(max_num_columns, row.len());
}
let mut output = vec![0; max_num_columns];
for column in processed_table.headers.iter().enumerate() {
output[column.0] = max(output[column.0], column_width(&column.1.contents));
}
for row in &processed_table.data {
for column in row.iter().enumerate() {
output[column.0] = max(output[column.0], column_width(&column.1.contents));
}
}
output
}
pub fn maybe_truncate_columns(termwidth: usize, processed_table: &mut ProcessedTable) {
// Make sure we have enough space for the columns we have
let max_num_of_columns = termwidth / 10;
// If we have too many columns, truncate the table
if max_num_of_columns < processed_table.headers.len() {
processed_table.headers.truncate(max_num_of_columns);
for entry in processed_table.data.iter_mut() {
entry.truncate(max_num_of_columns);
}
processed_table.headers.push(ProcessedCell {
contents: vec![vec![Subline {
subline: "...",
width: 3,
}]],
style: TextStyle::basic_center(),
});
for entry in processed_table.data.iter_mut() {
entry.push(ProcessedCell {
contents: vec![vec![Subline {
subline: "...",
width: 3,
}]],
style: TextStyle::basic_center(),
}); // ellipsis is centred
}
}
}
pub fn draw_table(table: &Table, termwidth: usize, color_hm: &HashMap<String, Style>) -> String {
// Remove the edges, if used
let termwidth = if table.theme.print_left_border && table.theme.print_right_border {
termwidth - 2
} else if table.theme.print_left_border || table.theme.print_right_border {
termwidth - 1
} else {
termwidth
};
let mut processed_table = process_table(table);
let max_per_column = get_max_column_widths(&processed_table);
maybe_truncate_columns(termwidth, &mut processed_table);
let headers_len = processed_table.headers.len();
// fix the length of the table if there are no headers:
let headers_len = if headers_len == 0 {
if !table.data.is_empty() && !table.data[0].is_empty() {
table.data[0].len()
} else {
return String::new();
}
} else {
headers_len
};
// Measure how big our columns need to be (accounting for separators also)
let max_naive_column_width = (termwidth - 3 * (headers_len - 1)) / headers_len;
let column_space = ColumnSpace::measure(&max_per_column, max_naive_column_width, headers_len);
// This gives us the max column width
let max_column_width = column_space.max_width(termwidth);
// This width isn't quite right, as we're rounding off some of our space
let column_space = column_space.fix_almost_column_width(
&max_per_column,
max_naive_column_width,
max_column_width,
headers_len,
);
// This should give us the final max column width
let max_column_width = column_space.max_width(termwidth);
let re_leading =
regex::Regex::new(r"(?P<beginsp>^\s+)").expect("error with leading space regex");
let re_trailing =
regex::Regex::new(r"(?P<endsp>\s+$)").expect("error with trailing space regex");
let wrapped_table = wrap_cells(
processed_table,
max_column_width,
color_hm,
&re_leading,
&re_trailing,
);
wrapped_table.print_table(color_hm)
}
fn wrap_cells(
processed_table: ProcessedTable,
max_column_width: usize,
color_hm: &HashMap<String, Style>,
re_leading: &regex::Regex,
re_trailing: &regex::Regex,
) -> WrappedTable {
let mut column_widths = vec![
0;
std::cmp::max(
processed_table.headers.len(),
if !processed_table.data.is_empty() {
processed_table.data[0].len()
} else {
0
}
)
];
let mut output_headers = vec![];
for header in processed_table.headers.into_iter().enumerate() {
let mut wrapped = WrappedCell {
lines: vec![],
max_width: 0,
style: header.1.style,
};
for contents in header.1.contents.into_iter() {
let (mut lines, inner_max_width) = wrap(
max_column_width,
contents.into_iter(),
color_hm,
re_leading,
re_trailing,
);
wrapped.lines.append(&mut lines);
if inner_max_width > wrapped.max_width {
wrapped.max_width = inner_max_width;
}
}
if column_widths[header.0] < wrapped.max_width {
column_widths[header.0] = wrapped.max_width;
}
output_headers.push(wrapped);
}
let mut output_data = vec![];
for row in processed_table.data.into_iter() {
let mut output_row = vec![];
for column in row.into_iter().enumerate() {
let mut wrapped = WrappedCell {
lines: vec![],
max_width: 0,
style: column.1.style,
};
for contents in column.1.contents.into_iter() {
let (mut lines, inner_max_width) = wrap(
max_column_width,
contents.into_iter(),
color_hm,
re_leading,
re_trailing,
);
wrapped.lines.append(&mut lines);
if inner_max_width > wrapped.max_width {
wrapped.max_width = inner_max_width;
}
}
if column_widths[column.0] < wrapped.max_width {
column_widths[column.0] = wrapped.max_width;
}
output_row.push(wrapped);
}
output_data.push(output_row);
}
WrappedTable {
column_widths,
headers: output_headers,
data: output_data,
theme: processed_table.theme,
}
}
struct ColumnSpace {
num_overages: usize,
underage_sum: usize,
overage_separator_sum: usize,
}
impl ColumnSpace {
/// Measure how much space we have once we subtract off the columns who are small enough
fn measure(
max_per_column: &[usize],
max_naive_column_width: usize,
headers_len: usize,
) -> ColumnSpace {
let mut num_overages = 0;
let mut underage_sum = 0;
let mut overage_separator_sum = 0;
let iter = max_per_column.iter().enumerate().take(headers_len);
for (i, &column_max) in iter {
if column_max > max_naive_column_width {
num_overages += 1;
if i != (headers_len - 1) {
overage_separator_sum += 3;
}
if i == 0 {
overage_separator_sum += 1;
}
} else {
underage_sum += column_max;
// if column isn't last, add 3 for its separator
if i != (headers_len - 1) {
underage_sum += 3;
}
if i == 0 {
underage_sum += 1;
}
}
}
ColumnSpace {
num_overages,
underage_sum,
overage_separator_sum,
}
}
fn fix_almost_column_width(
self,
max_per_column: &[usize],
max_naive_column_width: usize,
max_column_width: usize,
headers_len: usize,
) -> ColumnSpace {
let mut num_overages = 0;
let mut overage_separator_sum = 0;
let mut underage_sum = self.underage_sum;
let iter = max_per_column.iter().enumerate().take(headers_len);
for (i, &column_max) in iter {
if column_max > max_naive_column_width {
if column_max <= max_column_width {
underage_sum += column_max;
// if column isn't last, add 3 for its separator
if i != (headers_len - 1) {
underage_sum += 3;
}
if i == 0 {
underage_sum += 1;
}
} else {
// Column is still too large, so let's count it
num_overages += 1;
if i != (headers_len - 1) {
overage_separator_sum += 3;
}
if i == 0 {
overage_separator_sum += 1;
}
}
}
}
ColumnSpace {
num_overages,
underage_sum,
overage_separator_sum,
}
}
fn max_width(&self, termwidth: usize) -> usize {
let ColumnSpace {
num_overages,
underage_sum,
overage_separator_sum,
} = self;
if *num_overages > 0 {
(termwidth - 1 - *underage_sum - *overage_separator_sum) / *num_overages
} else {
99999
}
}
}