invoice/
invoice.rs

1//! Example: a German business invoice — DIN-5008-style window-envelope
2//! address block, a striped multi-page position table (header repeats
3//! automatically across pages), a right-aligned Netto/USt/Brutto summary
4//! block, and a footer with bank details/VAT ID + page numbers.
5//! (Phase 6 DoD, `plan/phases/phase-6-business-polish.md`.)
6//!
7//! Run: `cargo run -p lightweight-pdf --example invoice`
8
9use lightweight_pdf::*;
10
11#[path = "common/mod.rs"]
12mod common;
13
14/// PDF points per millimeter (72pt / 25.4mm).
15const MM: f32 = 72.0 / 25.4;
16
17struct LineItem {
18    description: String,
19    qty: u32,
20    unit_price_cents: i64,
21}
22
23fn main() {
24    let mut items = vec![
25        LineItem {
26            description: "Beratungsleistung Projekt Alpha".to_string(),
27            qty: 8,
28            unit_price_cents: 12_000,
29        },
30        LineItem {
31            description: "Lizenz Software-Paket (jährlich)".to_string(),
32            qty: 1,
33            unit_price_cents: 49_900,
34        },
35        LineItem {
36            description: "Individuelle Anpassung / Customizing".to_string(),
37            qty: 3,
38            unit_price_cents: 15_000,
39        },
40    ];
41    // A few filler positions so the table is guaranteed to span more than
42    // one page, demonstrating the header-repeat-on-split behavior.
43    for i in 1..=25 {
44        items.push(LineItem {
45            description: format!("Zusatzposition {i:02}"),
46            qty: 1,
47            unit_price_cents: 990,
48        });
49    }
50
51    let net_total: i64 = items.iter().map(|i| i.qty as i64 * i.unit_price_cents).sum();
52    let vat_rate = 19;
53    let vat_total = net_total * vat_rate / 100;
54    let gross_total = net_total + vat_total;
55
56    let top_margin = 15.0 * MM;
57    let mut doc = Document::new(PageFormat::A4)
58        .margin(Margin::symmetric(20.0 * MM, top_margin))
59        .footer(Footer::new(30.0, |ctx| {
60            Column::new()
61                .gap(2.0)
62                .child(Line::new())
63                .child(
64                    Row::new()
65                        .gap(20.0)
66                        .child(Text::new("Musterbank · IBAN DE12 3456 7890 1234 5678 90 · BIC MUSTDEFF").size(8.0))
67                        .child(Text::new("USt-IdNr. DE123456789").size(8.0).flex(1.0)),
68                )
69                .child(Text::new(format!("Seite {} von {}", ctx.page, ctx.total_pages)).size(8.0))
70                .into()
71        }));
72
73    // --- DIN 5008 Form A window-envelope address block ----------------
74    // Window starts ~45mm from the top, ~20mm from the left
75    // (`plan/02-elementcatalog-and-features.md`); ~85x40mm matches a
76    // typical C6/5-long window envelope opening. Position/size are a
77    // documented convention for this recipe, not parsed from any norm
78    // document — a caller with different envelope stock adjusts these.
79    doc.add(Spacer::new(45.0 * MM - top_margin));
80    doc.add(
81        Column::new()
82            .gap(2.0)
83            .width(85.0 * MM)
84            .height(40.0 * MM)
85            .child(Text::new("Muster GmbH · Musterstraße 1 · 12345 Musterstadt").size(7.0))
86            .child(Spacer::new(8.0))
87            .child(Text::new("Empfänger GmbH"))
88            .child(Text::new("Frau Erika Mustermann"))
89            .child(Text::new("Beispielweg 42"))
90            .child(Text::new("54321 Beispielstadt")),
91    );
92    doc.add(Spacer::new(10.0 * MM));
93
94    doc.add(Text::new("Rechnung").heading1());
95    doc.add(Text::new(
96        "Rechnungsnummer: RE-2026-0142    Rechnungsdatum: 20.08.2026    Leistungsdatum: 20.08.2026",
97    ));
98    doc.add(Spacer::new(10.0));
99
100    doc.add(
101        Table::new()
102            .columns([
103                TableColumn::flex(1.0),
104                TableColumn::fixed(50.0).align(Align::End),
105                TableColumn::fixed(65.0).align(Align::End),
106                TableColumn::fixed(70.0).align(Align::End),
107            ])
108            .header(["Beschreibung", "Menge", "Einzelpreis", "Gesamt"])
109            .striped(Color::rgb(0xF5, 0xF5, 0xF5))
110            .rows(items.iter().map(|item| {
111                let total = item.qty as i64 * item.unit_price_cents;
112                vec![
113                    Element::from(item.description.as_str()),
114                    Element::from(item.qty.to_string()),
115                    Element::from(format_currency_de(item.unit_price_cents)),
116                    Element::from(format_currency_de(total)),
117                ]
118            })),
119    );
120
121    doc.add(Spacer::new(14.0));
122
123    // --- summary block (Netto/USt/Brutto), right-aligned --------------
124    // Recipe (`plan/02-elementcatalog-and-features.md`): an outer, full-
125    // width auto Column with `.align(Align::End)` positions the fixed-
126    // width (200pt) inner summary Column at the right edge; within it,
127    // each label gets `.flex(1.0)` to push its value to that block's own
128    // right edge. No special "summary block" element needed.
129    doc.add(
130        Column::new()
131            .align(Align::End)
132            .child(Column::new().gap(2.0).width(200.0).children(vec![
133                Element::from(
134                    Row::new()
135                        .child(Text::new("Nettosumme").flex(1.0))
136                        .child(Text::new(format_currency_de(net_total))),
137                ),
138                Element::from(
139                    Row::new()
140                        .child(Text::new(format!("zzgl. {vat_rate}% USt.")).flex(1.0))
141                        .child(Text::new(format_currency_de(vat_total))),
142                ),
143                Element::from(Line::new()),
144                Element::from(
145                    Row::new()
146                        .child(Text::new("Gesamtbetrag").bold().flex(1.0))
147                        .child(Text::new(format_currency_de(gross_total)).bold()),
148                ),
149            ])),
150    );
151
152    common::write_pdf(&doc, "invoice.pdf");
153}
invoice/invoice.rs

invoice/
invoice.rs
