fop 0.1.1

FOP (Formatting Objects Processor) — Apache FOP-compatible XSL-FO processor in pure Rust
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
166
167
168
169
170
171
172

//! Phase 5 features demonstration
//!
//! Demonstrates background colors, borders, text alignment, and spacing features.

use fop_core::FoTreeBuilder;
use fop_layout::LayoutEngine;
use fop_render::PdfRenderer;
use std::io::Cursor;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("=== Phase 5 Features Demo ===\n");

    demo_backgrounds_and_borders()?;
    demo_text_alignment()?;
    demo_block_spacing()?;

    println!("\n=== All Phase 5 demos complete ===");
    Ok(())
}

fn demo_backgrounds_and_borders() -> Result<(), Box<dyn std::error::Error>> {
    println!("1. Background Colors and Borders");

    let xml = r##"<?xml version="1.0"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <fo:layout-master-set>
        <fo:simple-page-master master-name="A4"
            page-width="210mm" page-height="297mm">
            <fo:region-body margin="1in"/>
        </fo:simple-page-master>
    </fo:layout-master-set>
    <fo:page-sequence master-reference="A4">
        <fo:flow flow-name="xsl-region-body">
            <fo:block font-size="18pt" font-weight="bold" color="blue">
                Backgrounds and Borders Demo
            </fo:block>

            <fo:block background-color="#FFEEAA"
                      border="2pt solid black"
                      padding="12pt">
                This block has a light yellow background and solid black border.
            </fo:block>

            <fo:block background-color="#AAEEFF"
                      border-top="3pt solid red"
                      border-bottom="3pt solid blue"
                      padding="8pt">
                This block has different top and bottom borders.
            </fo:block>
        </fo:flow>
    </fo:page-sequence>
</fo:root>"##;

    let fo_tree = FoTreeBuilder::new().parse(Cursor::new(xml))?;
    let area_tree = LayoutEngine::new().layout(&fo_tree)?;
    let pdf_doc = PdfRenderer::new().render(&area_tree)?;
    let pdf_bytes = pdf_doc.to_bytes()?;

    std::fs::write("/tmp/fop_backgrounds_borders.pdf", &pdf_bytes)?;
    println!("   ✓ PDF generated: /tmp/fop_backgrounds_borders.pdf");
    println!("   Size: {} bytes\n", pdf_bytes.len());

    Ok(())
}

fn demo_text_alignment() -> Result<(), Box<dyn std::error::Error>> {
    println!("2. Text Alignment");

    let xml = r##"<?xml version="1.0"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <fo:layout-master-set>
        <fo:simple-page-master master-name="A4"
            page-width="210mm" page-height="297mm">
            <fo:region-body margin="1in"/>
        </fo:simple-page-master>
    </fo:layout-master-set>
    <fo:page-sequence master-reference="A4">
        <fo:flow flow-name="xsl-region-body">
            <fo:block font-size="18pt" font-weight="bold">
                Text Alignment Demo
            </fo:block>

            <fo:block text-align="left" border="1pt solid gray">
                This text is left-aligned (default).
            </fo:block>

            <fo:block text-align="center" border="1pt solid gray">
                This text is center-aligned.
            </fo:block>

            <fo:block text-align="right" border="1pt solid gray">
                This text is right-aligned.
            </fo:block>

            <fo:block text-align="justify" border="1pt solid gray">
                This text is justified. In a longer paragraph, the words would be spaced
                to fill the entire line width evenly from left to right margins.
            </fo:block>
        </fo:flow>
    </fo:page-sequence>
</fo:root>"##;

    let fo_tree = FoTreeBuilder::new().parse(Cursor::new(xml))?;
    let area_tree = LayoutEngine::new().layout(&fo_tree)?;
    let pdf_doc = PdfRenderer::new().render(&area_tree)?;
    let pdf_bytes = pdf_doc.to_bytes()?;

    std::fs::write("/tmp/fop_text_alignment.pdf", &pdf_bytes)?;
    println!("   ✓ PDF generated: /tmp/fop_text_alignment.pdf");
    println!("   Size: {} bytes\n", pdf_bytes.len());

    Ok(())
}

fn demo_block_spacing() -> Result<(), Box<dyn std::error::Error>> {
    println!("3. Block Spacing (space-before/space-after)");

    let xml = r##"<?xml version="1.0"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <fo:layout-master-set>
        <fo:simple-page-master master-name="A4"
            page-width="210mm" page-height="297mm">
            <fo:region-body margin="1in"/>
        </fo:simple-page-master>
    </fo:layout-master-set>
    <fo:page-sequence master-reference="A4">
        <fo:flow flow-name="xsl-region-body">
            <fo:block font-size="18pt" font-weight="bold">
                Block Spacing Demo
            </fo:block>

            <fo:block>
                This is a normal block with default spacing.
            </fo:block>

            <fo:block space-before="24pt" space-after="24pt"
                      background-color="#EEEEFF">
                This block has 24pt space before and after.
            </fo:block>

            <fo:block>
                Another normal block to show the spacing effect.
            </fo:block>

            <fo:block space-before="12pt"
                      background-color="#FFEEEE">
                This block has only space-before.
            </fo:block>

            <fo:block space-after="12pt"
                      background-color="#EEFFEE">
                This block has only space-after.
            </fo:block>

            <fo:block>
                Final block showing spacing is applied correctly.
            </fo:block>
        </fo:flow>
    </fo:page-sequence>
</fo:root>"##;

    let fo_tree = FoTreeBuilder::new().parse(Cursor::new(xml))?;
    let area_tree = LayoutEngine::new().layout(&fo_tree)?;
    let pdf_doc = PdfRenderer::new().render(&area_tree)?;
    let pdf_bytes = pdf_doc.to_bytes()?;

    std::fs::write("/tmp/fop_block_spacing.pdf", &pdf_bytes)?;
    println!("   ✓ PDF generated: /tmp/fop_block_spacing.pdf");
    println!("   Size: {} bytes\n", pdf_bytes.len());

    Ok(())
}