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use crate::style::{HAlign, MaxWidth, MinWidth, Style};
use crate::table::{Content, Table};
use alloc::borrow::Cow;
use alloc::format;
use alloc::string::String;
use alloc::vec::Vec;
use core::fmt::Display;
use core::mem;
pub mod console;
pub mod markdown;
pub const NEWLINE: &str = "\n";
pub trait Renderer {
type Output: Display;
#[inline]
fn render(&self, table: &Table) -> Self::Output {
self.render_with_hints(table, &[])
}
fn render_with_hints(&self, table: &Table, hints: &[RenderHint]) -> Self::Output;
}
#[derive(PartialEq, Eq)]
pub enum RenderHint {
Nested,
}
impl Content {
pub fn render<R: Renderer>(&self, renderer: &R) -> Cow<str> {
match self {
Content::Label(s) => Cow::Borrowed(s),
Content::Computed(f) => Cow::Owned(f()),
Content::Nested(table) => {
Cow::Owned(format!("{}", renderer.render_with_hints(table, &[RenderHint::Nested])))
}
Content::Composite(contents) => {
let mut buf = String::new();
for content in contents {
buf.push_str(&content.render(renderer));
}
Cow::Owned(buf)
}
}
}
}
impl Table {
pub fn col_widths(&self, renderer: &impl Renderer) -> Vec<usize> {
(0..self.num_cols())
.into_iter()
.map(|col| self.col_width(col, renderer))
.collect()
}
pub fn col_width(&self, col: usize, renderer: &impl Renderer) -> usize {
(0..self.num_rows())
.into_iter()
.map(|row| self.cell(col, row))
.map(|cell| {
let styles = cell.blended_styles();
let min_width = MinWidth::resolve_or_default(&styles).0;
let max_width = MaxWidth::resolve_or_default(&styles).0;
let widest_line = cell
.map(|cell| {
cell.data()
.render(renderer)
.lines()
.map(|line| line.chars().count())
.max()
.unwrap_or(0)
})
.unwrap_or(0);
usize::min(usize::max(min_width, widest_line), max_width)
})
.max()
.unwrap_or(0)
}
}
pub fn pad<'a>(s: &'a str, p: char, width: usize, alignment: &HAlign) -> Cow<'a, str> {
let chars = s.chars().collect::<Vec<_>>();
if chars.len() >= width {
Cow::Borrowed(s)
} else {
let mut buf = String::with_capacity(width);
let mut consumed = 0;
for ch in chars {
buf.push(ch);
consumed += 1;
}
match alignment {
HAlign::Left => {
for _ in consumed..width {
buf.push(p);
}
}
HAlign::Centred => {
for (excess, _) in (consumed..width).enumerate() {
if excess % 2 == 0 {
buf.push(p);
} else {
buf.insert(0, p);
}
}
}
HAlign::Right => {
for _ in consumed..width {
buf.insert(0, p);
}
}
}
Cow::Owned(buf)
}
}
pub fn wrap(s: &str, width: usize) -> Vec<String> {
let mut wrapped_lines = Vec::new();
let mut wrapped_lines_before;
for input_line in s.lines() {
wrapped_lines_before = wrapped_lines.len();
let mut buf_chars = 0;
let mut buf = String::new();
for word in split_preserving_whitespace(input_line) {
let chars = word.chars();
let word_chars = chars.count();
let needed_width = if buf_chars > 0 {
word_chars + 1
} else {
word_chars
};
if word_chars > width {
if buf_chars > 0 && buf_chars < width {
buf_chars += 1;
if buf_chars < width {
buf.push(' ');
}
}
let chars = word.chars();
for ch in chars {
if buf_chars == width {
let current_buf = mem::take(&mut buf);
wrapped_lines.push(current_buf);
buf_chars = 0;
}
buf.push(ch);
buf_chars += 1;
}
} else if buf_chars + needed_width > width {
let current_buf = mem::take(&mut buf);
wrapped_lines.push(current_buf);
buf_chars = word_chars;
buf.push_str(&word);
} else {
if buf_chars > 0 {
buf_chars += 1;
buf.push(' ');
}
buf.push_str(&word);
buf_chars += word_chars;
}
}
if wrapped_lines.len() == wrapped_lines_before || buf_chars > 0 {
wrapped_lines.push(buf);
}
}
if wrapped_lines.is_empty() {
wrapped_lines.push(String::new());
}
wrapped_lines
}
pub fn split_preserving_whitespace(s: &str) -> Vec<String> {
let mut frags = Vec::new();
let mut buf = String::new();
let mut prev_whitespace = true;
for ch in s.chars() {
let whitespace = ch.is_whitespace();
if prev_whitespace || !whitespace {
buf.push(ch);
prev_whitespace = whitespace;
} else {
frags.push(mem::take(&mut buf));
prev_whitespace = true;
}
}
frags.push(buf);
frags
}
#[cfg(test)]
mod tests;