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use std::rc::Rc;
use byteorder::{LittleEndian, WriteBytesExt};
use failure::Error;
use crate::{
chunks::TOKEN_XML_START_NAMESPACE,
model::{owned::OwnedBuf, NamespaceStart, StringTable},
};
#[derive(Debug, Copy, Clone)]
pub struct XmlNamespaceStartBuf {
line: u32,
prefix_index: u32,
namespace_index: u32,
}
impl XmlNamespaceStartBuf {
pub fn new(line: u32, prefix_index: u32, namespace_index: u32) -> Self {
Self {
line,
prefix_index,
namespace_index,
}
}
}
impl NamespaceStart for XmlNamespaceStartBuf {
fn get_line(&self) -> Result<u32, Error> {
Ok(self.line)
}
fn get_prefix<S: StringTable>(&self, string_table: &S) -> Result<Rc<String>, Error> {
let string = string_table.get_string(self.prefix_index)?;
Ok(string)
}
fn get_namespace<S: StringTable>(&self, string_table: &S) -> Result<Rc<String>, Error> {
let string = string_table.get_string(self.namespace_index)?;
Ok(string)
}
}
impl OwnedBuf for XmlNamespaceStartBuf {
fn get_token(&self) -> u16 {
TOKEN_XML_START_NAMESPACE
}
fn get_body_data(&self) -> Result<Vec<u8>, Error> {
let mut out = Vec::new();
out.write_u32::<LittleEndian>(self.prefix_index)?;
out.write_u32::<LittleEndian>(self.namespace_index)?;
Ok(out)
}
fn get_header(&self) -> Result<Vec<u8>, Error> {
let mut out = Vec::new();
out.write_u32::<LittleEndian>(self.line)?;
out.write_u32::<LittleEndian>(0xFFFF_FFFF)?;
Ok(out)
}
}
#[cfg(test)]
mod tests {
use super::{NamespaceStart, OwnedBuf, XmlNamespaceStartBuf};
use crate::{
chunks::XmlNamespaceStartWrapper,
raw_chunks::EXAMPLE_NAMESPACE_START,
test::{compare_chunks, FakeStringTable},
};
#[test]
fn it_can_generate_a_chunk_with_the_given_data() {
let fake_string_table = FakeStringTable;
let namespace_start = XmlNamespaceStartBuf::new(99, 11, 33);
assert_eq!(
"Ones",
&*namespace_start.get_prefix(&fake_string_table).unwrap()
);
assert_eq!(
"Threes",
&*namespace_start.get_namespace(&fake_string_table).unwrap()
);
}
#[test]
fn identity() {
let wrapper = XmlNamespaceStartWrapper::new(EXAMPLE_NAMESPACE_START);
let owned = wrapper.to_buffer().unwrap();
let new_raw = owned.to_vec().unwrap();
compare_chunks(&new_raw, &EXAMPLE_NAMESPACE_START);
}
}