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
|
use crate::color::Color;
use pango::FontDescription;
use pangocairo::{cairo, pango};
use serde::Deserialize;
use std::f64::consts::{FRAC_PI_2, PI, TAU};
#[derive(Clone, Debug, PartialEq)]
pub struct RenderOptions {
pub x_offset: f64,
pub bar_height: f64,
pub fg_color: Color,
pub bg_color: Option<Color>,
pub r_left: f64,
pub r_right: f64,
pub overlap: f64,
}
#[derive(Clone, Debug, PartialEq)]
pub struct Attributes {
pub font: FontDescription,
pub padding_left: f64,
pub padding_right: f64,
pub min_width: Option<f64>,
pub align: Align,
pub markup: bool,
}
#[derive(Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum Align {
Right,
Left,
Center,
}
impl Default for Align {
fn default() -> Self {
Self::Left
}
}
#[derive(Clone, Debug, PartialEq)]
pub struct ComputedText {
pub layout: pango::Layout,
pub attr: Attributes,
pub width: f64,
pub height: f64,
}
impl ComputedText {
pub fn new(text: &str, mut attr: Attributes, context: &cairo::Context) -> Self {
let layout = pangocairo::create_layout(context).unwrap();
layout.set_font_description(Some(&attr.font));
if attr.markup {
layout.set_markup(text);
} else {
layout.set_text(text);
}
let (text_width, text_height) = layout.pixel_size();
let mut width = f64::from(text_width) + attr.padding_right + attr.padding_right;
let height = f64::from(text_height);
if let Some(min_width) = attr.min_width {
if width < min_width {
let d = min_width - width;
width = min_width;
match attr.align {
Align::Right => attr.padding_left += d,
Align::Left => attr.padding_right += d,
Align::Center => {
attr.padding_left += d * 0.5;
attr.padding_right += d * 0.5;
}
}
}
}
Self {
layout,
attr,
width,
height,
}
}
pub fn render(&self, context: &cairo::Context, options: RenderOptions) {
context.save().unwrap();
context.translate(options.x_offset - options.overlap, 0.0);
// Draw background
if let Some(bg) = options.bg_color {
bg.apply(context);
rounded_rectangle(
context,
0.0,
0.0,
self.width + options.overlap,
options.bar_height,
options.r_left,
options.r_right,
);
context.fill().unwrap();
}
options.fg_color.apply(context);
context.translate(
self.attr.padding_left + options.overlap,
(options.bar_height - self.height) * 0.5,
);
pangocairo::show_layout(context, &self.layout);
context.restore().unwrap();
}
}
fn rounded_rectangle(
context: &cairo::Context,
x: f64,
y: f64,
w: f64,
h: f64,
r_left: f64,
r_right: f64,
) {
if r_left > 0.0 || r_right > 0.0 {
context.new_sub_path();
context.arc(x + r_left, y + r_left, r_left, PI, 3.0 * FRAC_PI_2);
context.arc(x + w - r_right, y + r_right, r_right, 3.0 * FRAC_PI_2, TAU);
context.arc(x + w - r_right, y + h - r_right, r_right, 0.0, FRAC_PI_2);
context.arc(x + r_left, y + h - r_left, r_left, FRAC_PI_2, PI);
context.close_path();
} else {
context.rectangle(x, y, w, h);
}
}
pub fn width_of(text: &str, context: &cairo::Context, markup: bool, font: &FontDescription) -> f64 {
ComputedText::new(
text,
Attributes {
font: font.clone(),
padding_left: 0.0,
padding_right: 0.0,
min_width: None,
align: Default::default(),
markup,
},
context,
)
.width
}
|
