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
157
158
159
160
161
162
163
164
165
|
//! Derived from TUI-rs, license: MIT, Copyright (c) 2016 Florian Dehau
use std::borrow::Borrow;
use std::marker::PhantomData;
use tui::{
buffer::Buffer, layout::Rect, style::Color, style::Style, symbols::line, widgets::Borders,
};
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);
}
}
}
#[derive(Clone, Copy, Default)]
pub struct Block<'a, T>(PhantomData<&'a T>);
pub struct BlockProps<'a> {
/// Optional title place on the upper left of the block
pub title: Option<&'a str>,
/// Title style
pub title_style: Style,
/// Visible borders
pub borders: Borders,
/// Border style
pub border_style: Style,
/// Widget style
pub style: Style,
}
impl<'a> Default for BlockProps<'a> {
fn default() -> BlockProps<'a> {
BlockProps {
title: None,
title_style: Default::default(),
borders: Borders::NONE,
border_style: Default::default(),
style: Default::default(),
}
}
}
impl<'a> BlockProps<'a> {
/// Compute the inner area of a block based on its border visibility rules.
pub fn inner(&self, area: Rect) -> Rect {
if area.width < 2 || area.height < 2 {
return Rect::default();
}
let mut inner = area;
if self.borders.intersects(Borders::LEFT) {
inner.x += 1;
inner.width -= 1;
}
if self.borders.intersects(Borders::TOP) || self.title.is_some() {
inner.y += 1;
inner.height -= 1;
}
if self.borders.intersects(Borders::RIGHT) {
inner.width -= 1;
}
if self.borders.intersects(Borders::BOTTOM) {
inner.height -= 1;
}
inner
}
pub fn render(&self, area: Rect, buf: &mut Buffer) {
Block::<()>::default().render(self, area, buf);
}
}
impl<'a, T> Block<'a, T> {
fn render(&self, props: impl Borrow<BlockProps<'a>>, area: Rect, buf: &mut Buffer) {
if area.width < 2 || area.height < 2 {
return;
}
let BlockProps {
title,
title_style,
borders,
border_style,
style,
} = props.borrow();
fill_background(area, buf, style.bg);
// Sides
if borders.intersects(Borders::LEFT) {
for y in area.top()..area.bottom() {
buf.get_mut(area.left(), y)
.set_symbol(line::VERTICAL)
.set_style(*border_style);
}
}
if borders.intersects(Borders::TOP) {
for x in area.left()..area.right() {
buf.get_mut(x, area.top())
.set_symbol(line::HORIZONTAL)
.set_style(*border_style);
}
}
if borders.intersects(Borders::RIGHT) {
let x = area.right() - 1;
for y in area.top()..area.bottom() {
buf.get_mut(x, y)
.set_symbol(line::VERTICAL)
.set_style(*border_style);
}
}
if borders.intersects(Borders::BOTTOM) {
let y = area.bottom() - 1;
for x in area.left()..area.right() {
buf.get_mut(x, y)
.set_symbol(line::HORIZONTAL)
.set_style(*border_style);
}
}
// Corners
if borders.contains(Borders::LEFT | Borders::TOP) {
buf.get_mut(area.left(), area.top())
.set_symbol(line::TOP_LEFT)
.set_style(*border_style);
}
if borders.contains(Borders::RIGHT | Borders::TOP) {
buf.get_mut(area.right() - 1, area.top())
.set_symbol(line::TOP_RIGHT)
.set_style(*border_style);
}
if borders.contains(Borders::LEFT | Borders::BOTTOM) {
buf.get_mut(area.left(), area.bottom() - 1)
.set_symbol(line::BOTTOM_LEFT)
.set_style(*border_style);
}
if borders.contains(Borders::RIGHT | Borders::BOTTOM) {
buf.get_mut(area.right() - 1, area.bottom() - 1)
.set_symbol(line::BOTTOM_RIGHT)
.set_style(*border_style);
}
if area.width > 2 {
if let Some(title) = title {
let lx = if borders.intersects(Borders::LEFT) {
1
} else {
0
};
let rx = if borders.intersects(Borders::RIGHT) {
1
} else {
0
};
let width = area.width - lx - rx;
buf.set_stringn(
area.left() + lx,
area.top(),
title,
width as usize,
*title_style,
);
}
}
}
}
|
