1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
#![forbid(unsafe_code)]
mod list;
mod terminal;
pub use list::*;
pub use terminal::*;
use std::iter::repeat;
use tui::{self, buffer::Buffer, layout::Rect, style::Color, style::Style};
use unicode_segmentation::UnicodeSegmentation;
use unicode_width::UnicodeWidthStr;
pub fn fill_background_to_right(mut s: String, entire_width: u16) -> String {
match (s.len(), entire_width as usize) {
(x, y) if x >= y => s,
(x, y) => {
s.extend(repeat(' ').take(y - x));
s
}
}
}
/// Helper method to quickly set the background of all cells inside the specified area.
pub fn fill_background(area: Rect, buf: &mut Buffer, color: Color) {
for y in area.top()..area.bottom() {
for x in area.left()..area.right() {
buf.get_mut(x, y).set_bg(color);
}
}
}
pub fn draw_text_with_ellipsis_nowrap(
bound: Rect,
buf: &mut Buffer,
text: impl AsRef<str>,
style: impl Into<Option<Style>>,
) -> u16 {
let s = style.into();
let t = text.as_ref();
let mut graphemes = t.graphemes(true);
let mut total_width = 0;
{
let mut ellipsis_candidate_x = None;
let mut x_offset = 0;
for (g, mut x) in graphemes.by_ref().zip(bound.left()..bound.right()) {
let width = g.width();
total_width += width;
x += x_offset;
let cell = buf.get_mut(x, bound.y);
if x + 1 == bound.right() {
ellipsis_candidate_x = Some(x);
}
cell.symbol = g.into();
if let Some(s) = s {
cell.style = s;
}
x_offset += width.saturating_sub(1) as u16;
if x + x_offset >= bound.right() {
break;
}
let x = x as usize;
for x in x + 1..x + width {
let i = buf.index_of(x as u16, bound.y);
buf.content[i].reset();
}
}
if let (Some(_), Some(x)) = (graphemes.next(), ellipsis_candidate_x) {
buf.get_mut(x, bound.y).symbol = "…".into();
}
}
total_width as u16
}
pub fn draw_text_nowrap_fn(
bound: Rect,
buf: &mut Buffer,
t: impl AsRef<str>,
mut s: impl FnMut(&str, u16, u16) -> Style,
) {
if bound.width == 0 {
return;
}
for (g, x) in t.as_ref().graphemes(true).zip(bound.left()..bound.right()) {
let cell = buf.get_mut(x, bound.y);
cell.symbol = g.into();
cell.style = s(&cell.symbol, x, bound.y);
}
}
pub mod util {
use unicode_segmentation::UnicodeSegmentation;
use unicode_width::UnicodeWidthStr;
pub fn sanitize_offset(offset: u16, num_items: usize, num_displayable_lines: u16) -> u16 {
offset.min((num_items.saturating_sub(num_displayable_lines as usize)) as u16)
}
#[derive(Default)]
pub struct GraphemeCountWriter(pub usize);
impl std::io::Write for GraphemeCountWriter {
fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
self.0 += String::from_utf8_lossy(buf).graphemes(true).count();
Ok(buf.len())
}
fn flush(&mut self) -> Result<(), std::io::Error> {
Ok(())
}
}
pub fn block_width(s: &str) -> u16 {
s.width() as u16
}
pub mod rect {
use tui::layout::Rect;
/// A safe version of Rect::intersection that doesn't suffer from underflows
pub fn intersect(lhs: Rect, rhs: Rect) -> Rect {
let x1 = lhs.x.max(rhs.x);
let y1 = lhs.y.max(rhs.y);
let x2 = lhs.right().min(rhs.right());
let y2 = lhs.bottom().min(rhs.bottom());
Rect {
x: x1,
y: y1,
width: x2.saturating_sub(x1),
height: y2.saturating_sub(y1),
}
}
pub fn offset_x(r: Rect, offset: u16) -> Rect {
Rect {
x: r.x + offset,
width: r.width.saturating_sub(offset),
..r
}
}
pub fn snap_to_right(bound: Rect, new_width: u16) -> Rect {
offset_x(bound, bound.width.saturating_sub(new_width))
}
pub fn line_bound(bound: Rect, line: usize) -> Rect {
Rect {
y: bound.y + line as u16,
height: 1,
..bound
}
}
}
}
|
