dxpdf 0.2.3

A fast DOCX-to-PDF converter powered by Skia
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

//! Color resolution — Color::Auto to RGB, theme color index to RGB.

use crate::model::{Color, ThemeColorIndex, ThemeColorScheme};

/// Resolved RGB color (0xRRGGBB).
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct RgbColor {
    pub r: u8,
    pub g: u8,
    pub b: u8,
}

impl RgbColor {
    pub const BLACK: Self = Self { r: 0, g: 0, b: 0 };
    pub const WHITE: Self = Self {
        r: 255,
        g: 255,
        b: 255,
    };
}

/// Context for resolving Color::Auto.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum ColorContext {
    /// Text color — Auto means black.
    Text,
    /// Background/fill color — Auto means white.
    Background,
}

/// Resolve a model Color to concrete RGB.
pub fn resolve_color(color: Color, context: ColorContext) -> RgbColor {
    match color {
        Color::Rgb(v) => rgb_from_u32(v),
        Color::Auto => match context {
            ColorContext::Text => RgbColor::BLACK,
            ColorContext::Background => RgbColor::WHITE,
        },
    }
}

/// Resolve a theme color index to RGB via the color scheme.
pub fn resolve_theme_color(index: ThemeColorIndex, scheme: &ThemeColorScheme) -> RgbColor {
    rgb_from_u32(scheme.resolve(index))
}

/// Convert a packed u32 (0xRRGGBB) to RgbColor.
pub fn rgb_from_u32(v: u32) -> RgbColor {
    RgbColor {
        r: ((v >> 16) & 0xFF) as u8,
        g: ((v >> 8) & 0xFF) as u8,
        b: (v & 0xFF) as u8,
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn rgb_from_u32_red() {
        let c = rgb_from_u32(0xFF0000);
        assert_eq!(c, RgbColor { r: 255, g: 0, b: 0 });
    }

    #[test]
    fn rgb_from_u32_white() {
        let c = rgb_from_u32(0xFFFFFF);
        assert_eq!(c, RgbColor::WHITE);
    }

    #[test]
    fn rgb_from_u32_black() {
        let c = rgb_from_u32(0x000000);
        assert_eq!(c, RgbColor::BLACK);
    }

    #[test]
    fn rgb_from_u32_mixed() {
        let c = rgb_from_u32(0x1A2B3C);
        assert_eq!(
            c,
            RgbColor {
                r: 0x1A,
                g: 0x2B,
                b: 0x3C
            }
        );
    }

    #[test]
    fn resolve_color_rgb_passes_through() {
        let c = resolve_color(Color::Rgb(0x336699), ColorContext::Text);
        assert_eq!(
            c,
            RgbColor {
                r: 0x33,
                g: 0x66,
                b: 0x99
            }
        );
    }

    #[test]
    fn resolve_color_auto_text_is_black() {
        let c = resolve_color(Color::Auto, ColorContext::Text);
        assert_eq!(c, RgbColor::BLACK);
    }

    #[test]
    fn resolve_color_auto_background_is_white() {
        let c = resolve_color(Color::Auto, ColorContext::Background);
        assert_eq!(c, RgbColor::WHITE);
    }

    #[test]
    fn resolve_theme_color_accent1() {
        let scheme = ThemeColorScheme {
            accent1: 0x4472C4,
            ..Default::default()
        };
        let c = resolve_theme_color(ThemeColorIndex::Accent1, &scheme);
        assert_eq!(
            c,
            RgbColor {
                r: 0x44,
                g: 0x72,
                b: 0xC4
            }
        );
    }

    #[test]
    fn resolve_theme_color_dark1() {
        let scheme = ThemeColorScheme {
            dark1: 0x000000,
            ..Default::default()
        };
        let c = resolve_theme_color(ThemeColorIndex::Dark1, &scheme);
        assert_eq!(c, RgbColor::BLACK);
    }

    #[test]
    fn resolve_theme_color_hyperlink() {
        let scheme = ThemeColorScheme {
            hyperlink: 0x0563C1,
            ..Default::default()
        };
        let c = resolve_theme_color(ThemeColorIndex::Hyperlink, &scheme);
        assert_eq!(
            c,
            RgbColor {
                r: 0x05,
                g: 0x63,
                b: 0xC1
            }
        );
    }
}