mirror of
https://github.com/ratatui-org/ratatui
synced 2024-11-22 12:43:16 +00:00
4d70169bef
* feat(list): add option to always allocate the "selection" column width Before this option was available, selecting a item in a list when nothing was selected previously made the row layout change (the same applies to unselecting) by adding the width of the "highlight symbol" in the front of the list, this option allows to configure this behavior. * style: change "highlight_spacing" doc comment to use inline code-block for reference
370 lines
13 KiB
Rust
370 lines
13 KiB
Rust
#![allow(deprecated)]
|
|
|
|
use ratatui::{
|
|
backend::TestBackend,
|
|
buffer::Buffer,
|
|
layout::Rect,
|
|
style::{Color, Style},
|
|
symbols,
|
|
text::Line,
|
|
widgets::{Block, Borders, HighlightSpacing, List, ListItem, ListState},
|
|
Terminal,
|
|
};
|
|
|
|
#[test]
|
|
fn list_should_shows_the_length() {
|
|
let items = vec![
|
|
ListItem::new("Item 1"),
|
|
ListItem::new("Item 2"),
|
|
ListItem::new("Item 3"),
|
|
];
|
|
let list = List::new(items);
|
|
assert_eq!(list.len(), 3);
|
|
assert!(!list.is_empty());
|
|
|
|
let empty_list = List::new(vec![]);
|
|
assert_eq!(empty_list.len(), 0);
|
|
assert!(empty_list.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn widgets_list_should_highlight_the_selected_item() {
|
|
let backend = TestBackend::new(10, 3);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
let mut state = ListState::default();
|
|
state.select(Some(1));
|
|
terminal
|
|
.draw(|f| {
|
|
let size = f.size();
|
|
let items = vec![
|
|
ListItem::new("Item 1"),
|
|
ListItem::new("Item 2"),
|
|
ListItem::new("Item 3"),
|
|
];
|
|
let list = List::new(items)
|
|
.highlight_style(Style::default().bg(Color::Yellow))
|
|
.highlight_symbol(">> ");
|
|
f.render_stateful_widget(list, size, &mut state);
|
|
})
|
|
.unwrap();
|
|
let mut expected = Buffer::with_lines(vec![" Item 1 ", ">> Item 2 ", " Item 3 "]);
|
|
for x in 0..10 {
|
|
expected.get_mut(x, 1).set_bg(Color::Yellow);
|
|
}
|
|
terminal.backend().assert_buffer(&expected);
|
|
}
|
|
|
|
#[test]
|
|
fn widgets_list_should_truncate_items() {
|
|
let backend = TestBackend::new(10, 2);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
|
|
struct TruncateTestCase<'a> {
|
|
selected: Option<usize>,
|
|
items: Vec<ListItem<'a>>,
|
|
expected: Buffer,
|
|
}
|
|
|
|
let cases = vec![
|
|
// An item is selected
|
|
TruncateTestCase {
|
|
selected: Some(0),
|
|
items: vec![
|
|
ListItem::new("A very long line"),
|
|
ListItem::new("A very long line"),
|
|
],
|
|
expected: Buffer::with_lines(vec![
|
|
format!(">> A ve{} ", symbols::line::VERTICAL),
|
|
format!(" A ve{} ", symbols::line::VERTICAL),
|
|
]),
|
|
},
|
|
// No item is selected
|
|
TruncateTestCase {
|
|
selected: None,
|
|
items: vec![
|
|
ListItem::new("A very long line"),
|
|
ListItem::new("A very long line"),
|
|
],
|
|
expected: Buffer::with_lines(vec![
|
|
format!("A very {} ", symbols::line::VERTICAL),
|
|
format!("A very {} ", symbols::line::VERTICAL),
|
|
]),
|
|
},
|
|
];
|
|
for case in cases {
|
|
let mut state = ListState::default();
|
|
state.select(case.selected);
|
|
terminal
|
|
.draw(|f| {
|
|
let list = List::new(case.items.clone())
|
|
.block(Block::default().borders(Borders::RIGHT))
|
|
.highlight_symbol(">> ");
|
|
f.render_stateful_widget(list, Rect::new(0, 0, 8, 2), &mut state);
|
|
})
|
|
.unwrap();
|
|
terminal.backend().assert_buffer(&case.expected);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn widgets_list_should_clamp_offset_if_items_are_removed() {
|
|
let backend = TestBackend::new(10, 4);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
let mut state = ListState::default();
|
|
|
|
// render with 6 items => offset will be at 2
|
|
state.select(Some(5));
|
|
terminal
|
|
.draw(|f| {
|
|
let size = f.size();
|
|
let items = vec![
|
|
ListItem::new("Item 0"),
|
|
ListItem::new("Item 1"),
|
|
ListItem::new("Item 2"),
|
|
ListItem::new("Item 3"),
|
|
ListItem::new("Item 4"),
|
|
ListItem::new("Item 5"),
|
|
];
|
|
let list = List::new(items).highlight_symbol(">> ");
|
|
f.render_stateful_widget(list, size, &mut state);
|
|
})
|
|
.unwrap();
|
|
let expected = Buffer::with_lines(vec![" Item 2 ", " Item 3 ", " Item 4 ", ">> Item 5 "]);
|
|
terminal.backend().assert_buffer(&expected);
|
|
|
|
// render again with 1 items => check offset is clamped to 1
|
|
state.select(Some(1));
|
|
terminal
|
|
.draw(|f| {
|
|
let size = f.size();
|
|
let items = vec![ListItem::new("Item 3")];
|
|
let list = List::new(items).highlight_symbol(">> ");
|
|
f.render_stateful_widget(list, size, &mut state);
|
|
})
|
|
.unwrap();
|
|
let expected = Buffer::with_lines(vec![" Item 3 ", " ", " ", " "]);
|
|
terminal.backend().assert_buffer(&expected);
|
|
}
|
|
|
|
#[test]
|
|
fn widgets_list_should_display_multiline_items() {
|
|
let backend = TestBackend::new(10, 6);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
let mut state = ListState::default();
|
|
state.select(Some(1));
|
|
terminal
|
|
.draw(|f| {
|
|
let size = f.size();
|
|
let items = vec![
|
|
ListItem::new(vec![Line::from("Item 1"), Line::from("Item 1a")]),
|
|
ListItem::new(vec![Line::from("Item 2"), Line::from("Item 2b")]),
|
|
ListItem::new(vec![Line::from("Item 3"), Line::from("Item 3c")]),
|
|
];
|
|
let list = List::new(items)
|
|
.highlight_style(Style::default().bg(Color::Yellow))
|
|
.highlight_symbol(">> ");
|
|
f.render_stateful_widget(list, size, &mut state);
|
|
})
|
|
.unwrap();
|
|
let mut expected = Buffer::with_lines(vec![
|
|
" Item 1 ",
|
|
" Item 1a",
|
|
">> Item 2 ",
|
|
" Item 2b",
|
|
" Item 3 ",
|
|
" Item 3c",
|
|
]);
|
|
for x in 0..10 {
|
|
expected.get_mut(x, 2).set_bg(Color::Yellow);
|
|
expected.get_mut(x, 3).set_bg(Color::Yellow);
|
|
}
|
|
terminal.backend().assert_buffer(&expected);
|
|
}
|
|
|
|
#[test]
|
|
fn widgets_list_should_repeat_highlight_symbol() {
|
|
let backend = TestBackend::new(10, 6);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
let mut state = ListState::default();
|
|
state.select(Some(1));
|
|
terminal
|
|
.draw(|f| {
|
|
let size = f.size();
|
|
let items = vec![
|
|
ListItem::new(vec![Line::from("Item 1"), Line::from("Item 1a")]),
|
|
ListItem::new(vec![Line::from("Item 2"), Line::from("Item 2b")]),
|
|
ListItem::new(vec![Line::from("Item 3"), Line::from("Item 3c")]),
|
|
];
|
|
let list = List::new(items)
|
|
.highlight_style(Style::default().bg(Color::Yellow))
|
|
.highlight_symbol(">> ")
|
|
.repeat_highlight_symbol(true);
|
|
f.render_stateful_widget(list, size, &mut state);
|
|
})
|
|
.unwrap();
|
|
let mut expected = Buffer::with_lines(vec![
|
|
" Item 1 ",
|
|
" Item 1a",
|
|
">> Item 2 ",
|
|
">> Item 2b",
|
|
" Item 3 ",
|
|
" Item 3c",
|
|
]);
|
|
for x in 0..10 {
|
|
expected.get_mut(x, 2).set_bg(Color::Yellow);
|
|
expected.get_mut(x, 3).set_bg(Color::Yellow);
|
|
}
|
|
terminal.backend().assert_buffer(&expected);
|
|
}
|
|
|
|
#[test]
|
|
fn widget_list_should_not_ignore_empty_string_items() {
|
|
let backend = TestBackend::new(6, 4);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
|
|
terminal
|
|
.draw(|f| {
|
|
let items = vec![
|
|
ListItem::new("Item 1"),
|
|
ListItem::new(""),
|
|
ListItem::new(""),
|
|
ListItem::new("Item 4"),
|
|
];
|
|
|
|
let list = List::new(items)
|
|
.style(Style::default())
|
|
.highlight_style(Style::default());
|
|
|
|
f.render_widget(list, f.size());
|
|
})
|
|
.unwrap();
|
|
|
|
let expected = Buffer::with_lines(vec!["Item 1", "", "", "Item 4"]);
|
|
|
|
terminal.backend().assert_buffer(&expected);
|
|
}
|
|
|
|
#[test]
|
|
fn widgets_list_enable_always_highlight_spacing() {
|
|
let test_case = |state: &mut ListState, space: HighlightSpacing, expected: Buffer| {
|
|
let backend = TestBackend::new(30, 8);
|
|
let mut terminal = Terminal::new(backend).unwrap();
|
|
terminal
|
|
.draw(|f| {
|
|
let size = f.size();
|
|
let table = List::new(vec![
|
|
ListItem::new(vec![Line::from("Item 1"), Line::from("Item 1a")]),
|
|
ListItem::new(vec![Line::from("Item 2"), Line::from("Item 2b")]),
|
|
ListItem::new(vec![Line::from("Item 3"), Line::from("Item 3c")]),
|
|
])
|
|
.block(Block::default().borders(Borders::ALL))
|
|
.highlight_symbol(">> ")
|
|
.highlight_spacing(space);
|
|
f.render_stateful_widget(table, size, state);
|
|
})
|
|
.unwrap();
|
|
terminal.backend().assert_buffer(&expected);
|
|
};
|
|
|
|
assert_eq!(HighlightSpacing::default(), HighlightSpacing::WhenSelected);
|
|
|
|
let mut state = ListState::default();
|
|
// no selection, "WhenSelected" should only allocate if selected
|
|
test_case(
|
|
&mut state,
|
|
HighlightSpacing::default(),
|
|
Buffer::with_lines(vec![
|
|
"┌────────────────────────────┐",
|
|
"│Item 1 │",
|
|
"│Item 1a │",
|
|
"│Item 2 │",
|
|
"│Item 2b │",
|
|
"│Item 3 │",
|
|
"│Item 3c │",
|
|
"└────────────────────────────┘",
|
|
]),
|
|
);
|
|
|
|
// no selection, "Always" should allocate regardless if selected or not
|
|
test_case(
|
|
&mut state,
|
|
HighlightSpacing::Always,
|
|
Buffer::with_lines(vec![
|
|
"┌────────────────────────────┐",
|
|
"│ Item 1 │",
|
|
"│ Item 1a │",
|
|
"│ Item 2 │",
|
|
"│ Item 2b │",
|
|
"│ Item 3 │",
|
|
"│ Item 3c │",
|
|
"└────────────────────────────┘",
|
|
]),
|
|
);
|
|
|
|
// no selection, "Never" should never allocate regadless if selected or not
|
|
test_case(
|
|
&mut state,
|
|
HighlightSpacing::Never,
|
|
Buffer::with_lines(vec![
|
|
"┌────────────────────────────┐",
|
|
"│Item 1 │",
|
|
"│Item 1a │",
|
|
"│Item 2 │",
|
|
"│Item 2b │",
|
|
"│Item 3 │",
|
|
"│Item 3c │",
|
|
"└────────────────────────────┘",
|
|
]),
|
|
);
|
|
|
|
// select first, "WhenSelected" should only allocate if selected
|
|
state.select(Some(0));
|
|
test_case(
|
|
&mut state,
|
|
HighlightSpacing::default(),
|
|
Buffer::with_lines(vec![
|
|
"┌────────────────────────────┐",
|
|
"│>> Item 1 │",
|
|
"│ Item 1a │",
|
|
"│ Item 2 │",
|
|
"│ Item 2b │",
|
|
"│ Item 3 │",
|
|
"│ Item 3c │",
|
|
"└────────────────────────────┘",
|
|
]),
|
|
);
|
|
|
|
// select first, "Always" should allocate regardless if selected or not
|
|
state.select(Some(0));
|
|
test_case(
|
|
&mut state,
|
|
HighlightSpacing::Always,
|
|
Buffer::with_lines(vec![
|
|
"┌────────────────────────────┐",
|
|
"│>> Item 1 │",
|
|
"│ Item 1a │",
|
|
"│ Item 2 │",
|
|
"│ Item 2b │",
|
|
"│ Item 3 │",
|
|
"│ Item 3c │",
|
|
"└────────────────────────────┘",
|
|
]),
|
|
);
|
|
|
|
// select first, "Never" should never allocate regadless if selected or not
|
|
state.select(Some(0));
|
|
test_case(
|
|
&mut state,
|
|
HighlightSpacing::Never,
|
|
Buffer::with_lines(vec![
|
|
"┌────────────────────────────┐",
|
|
"│Item 1 │",
|
|
"│Item 1a │",
|
|
"│Item 2 │",
|
|
"│Item 2b │",
|
|
"│Item 3 │",
|
|
"│Item 3c │",
|
|
"└────────────────────────────┘",
|
|
]),
|
|
);
|
|
}
|