lopdf/
content.rs

1use super::Object;
2use crate::writer::Writer;
3use crate::Result;
4use std::io::Write;
5
6#[derive(Debug, Clone)]
7pub struct Operation {
8    pub operator: String,
9    pub operands: Vec<Object>,
10}
11
12impl Operation {
13    pub fn new(operator: &str, operands: Vec<Object>) -> Operation {
14        Operation {
15            operator: operator.to_string(),
16            operands,
17        }
18    }
19}
20
21#[derive(Debug, Clone)]
22pub struct Content<Operations: AsRef<[Operation]> = Vec<Operation>> {
23    pub operations: Operations,
24}
25
26impl<Operations: AsRef<[Operation]>> Content<Operations> {
27    /// Encode content operations.
28    pub fn encode(&self) -> Result<Vec<u8>> {
29        let mut buffer = Vec::new();
30        let mut first_operation = true;
31        for operation in self.operations.as_ref() {
32            // Add new line after each operation except the last one.
33            if first_operation {
34                first_operation = false;
35            } else {
36                buffer.write_all(b"\n")?;
37            }
38            for operand in &operation.operands {
39                Writer::write_object(&mut buffer, operand)?;
40                buffer.write_all(b" ")?;
41            }
42            buffer.write_all(operation.operator.as_bytes())?;
43        }
44        Ok(buffer)
45    }
46}
lopdf/content.rs

lopdf/
content.rs
