libharu 0.1.5

Rust binding for libharu(http://libharu.org/) PDF library.
Documentation 
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

extern crate libharu;
extern crate anyhow;

use libharu::prelude::*;//{Document, PageDescriptionMode, PageDescTextCommon};

pub fn print_grid(doc: &Document, page: &PageDescriptionMode) -> anyhow::Result<()> {
    let height = page.height()?;
    let width = page.width()?;
    let font = doc.font("Helvetica", None)?;

    page.set_font_and_size(&font, 5.0)?;
    page.set_gray_fill(0.5)?;
    page.set_gray_stroke(0.8)?;

    /* draw horizontal lines */
    let mut y = 0.0;
    while y < height {
        if (y as u32) % 10 == 0 {
            page.set_line_width(0.5)?;
        }
        else {
            if page.line_width() != 0.25 {
                page.set_line_width(0.25)?;
            }
        }

        page.run_path_mode(|page|{
            page.move_to((0.0, y))?;
            page.line_to((width, y))?;
            page.stroke()?;
            Ok(())
        })?;

        if ((y as u32) % 10 == 0) && (y > 0.0) {
            page.set_gray_stroke(0.5)?;

            page.run_path_mode(|page|{
                page.move_to((0.0, y))?;
                page.line_to((5.0, y))?;
                page.stroke()?;
                Ok(())
            })?;

            page.set_gray_stroke(0.8)?;
        }
        y = y + 5.0;
    }

    /* draw vertical lines */
    let mut x = 0.0;
    while x < width {
        if ((x as u32) % 10) == 0 {
            page.set_line_width(0.5)?;
        }
        else {
            if page.line_width() != 0.25 {
                page.set_line_width(0.25)?;
            }
        }

        page.run_path_mode(|page|{
            page.move_to((x, 0.0))?;
            page.line_to((x, height))?;
            page.stroke()?;
            Ok(())
        })?;

        if ((x as u32) == 0) && (x > 0.0) {
            page.set_gray_stroke(0.5)?;

            page.run_path_mode(|page|{
                page.move_to((x, 0.0))?;
                page.line_to((x, 5.0))?;
                page.stroke()?;
    
                page.move_to((x, height))?;
                page.line_to((x, height - 5.0))?;
                page.stroke()?;
    
                Ok(())
            })?;
            
            page.set_gray_stroke(0.8)?;
        }

        x = x + 5.0;
    }

    /* Draw horizontal text */
    let mut y = 0.0;
    while y < height {
        if ((y as u32) % 10 == 0) && (y > 0.0) {
            page.run_text_mode(|page|{
                page.move_text_pos((5.0, y - 2.0))?;
                let text = format!("{}", y as u32);
                page.show_text(&text)?;
                Ok(())
            })?;
        }

        y = y + 5.0;
    }

    /* Draw virtical text */
    let mut x = 0.0;
    while x < width {
        if ((x as u32) %10 == 0) && (x > 0.0) {
            let text = format!("{}", x as u32);
            page.run_text_mode(|page|{
                page.move_text_pos((x, 5.0))?;
                page.show_text(&text)?;
                Ok(())
            })?;

            page.run_text_mode(|page|{
                page.move_text_pos((x, height - 10.0))?;
                page.show_text(&text)?;
                Ok(())
            })?;
        }

        x = x + 5.0;
    }

    page.set_gray_fill(0.0)?;
    page.set_gray_stroke(0.0)?;

    Ok(())
}