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simplify pagebreaks and add one space

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This commit is contained in:
phiresky 2022-12-26 19:28:56 +01:00
parent 2d28651bcb
commit 96ebcdef27
4 changed files with 48 additions and 59 deletions
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45
src/adapters/postproc.rs
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@ -170,7 +170,7 @@ impl FileAdapter for PostprocPageBreaks {
a: super::AdaptInfo,
_detection_reason: &crate::matching::FileMatcher,
) -> Result<AdaptedFilesIterBox> {
let read = postproc_pagebreaks("", postproc_encoding(&a.line_prefix, a.inp)?);
let read = postproc_pagebreaks(postproc_encoding(&a.line_prefix, a.inp)?);
// keep adapt info (filename etc) except replace inp
let ai = AdaptInfo {
inp: Box::pin(read),
@ -190,30 +190,27 @@ impl FileAdapter for PostprocPageBreaks {
/// Adds the prefix "Page N: " to each line,
/// where N starts at one and is incremented for each ASCII Form Feed character in the input stream.
/// ASCII form feeds are the page delimiters output by `pdftotext`.
pub fn postproc_pagebreaks(
line_prefix: &str,
input: impl AsyncRead + Send,
) -> impl AsyncRead + Send {
let line_prefix_o: String = line_prefix.into();
pub fn postproc_pagebreaks(input: impl AsyncRead + Send) -> impl AsyncRead + Send {
let regex_linefeed = regex::bytes::Regex::new(r"\x0c").unwrap();
let regex_newline = regex::bytes::Regex::new("\n").unwrap();
let mut page_count: i32 = 1;
let mut page_prefix: String = format!("Page {page_count}:{line_prefix_o}");
let mut page_prefix: String = format!("Page {page_count}: ");
let input_stream = ReaderStream::new(input);
let output_stream = stream! {
for await chunk in input_stream {
match chunk {
for await read_chunk in input_stream {
match read_chunk {
Err(e) => yield Err(e),
Ok(chunk) => {
let sub_chunks = regex_linefeed.split(&chunk);
for sub_chunk in sub_chunks {
let page_chunks = regex_linefeed.split(&chunk);
for page_chunk in page_chunks {
// println!("{}", String::from_utf8_lossy(page_prefix.as_bytes()));
yield Ok(Bytes::copy_from_slice(page_prefix.as_bytes()));
page_prefix = format!("\nPage {}:{}", page_count, line_prefix_o);
yield Ok(Bytes::copy_from_slice(&regex_newline.replace_all(sub_chunk, page_prefix.as_bytes())));
page_prefix = format!("\nPage {page_count}: ");
yield Ok(Bytes::copy_from_slice(&regex_newline.replace_all(page_chunk, page_prefix.as_bytes())));
page_count += 1;
page_prefix = format!("\nPage {}:{}", page_count, line_prefix_o);
page_prefix = format!("\nPage {page_count}: ");
}
}
}
@ -226,6 +223,7 @@ pub fn postproc_pagebreaks(
mod tests {
use super::*;
use anyhow::Result;
use pretty_assertions::assert_eq;
use tokio::pin;
use tokio_test::io::Builder;
use tokio_test::io::Mock;
@ -236,12 +234,12 @@ mod tests {
let mock: Mock = Builder::new()
.read(b"Hello\nWorld\x0cFoo Bar\n\x0cTest")
.build();
let res = postproc_pagebreaks("", mock).read_to_end(&mut output).await;
let res = postproc_pagebreaks(mock).read_to_end(&mut output).await;
println!("{}", String::from_utf8_lossy(&output));
assert!(matches!(res, Ok(_)));
assert_eq!(
output,
b"Page 1:Hello\nPage 1:World\nPage 2:Foo Bar\nPage 2:\nPage 3:Test"
String::from_utf8_lossy(&output),
"Page 1: Hello\nPage 1: World\nPage 2: Foo Bar\nPage 2: \nPage 3: Test"
);
}
@ -275,23 +273,14 @@ mod tests {
let mut oup = Vec::new();
let inp = postproc_encoding("", a)?;
if pagebreaks {
postproc_pagebreaks(line_prefix, inp)
.read_to_end(&mut oup)
.await?;
postproc_pagebreaks(inp).read_to_end(&mut oup).await?;
} else {
let x = postproc_prefix(line_prefix, inp);
pin!(x);
x.read_to_end(&mut oup).await?;
}
let c = String::from_utf8_lossy(&oup);
if b != c {
anyhow::bail!(
"`{}`\nshould be\n`{}`\nbut is\n`{}`",
String::from_utf8_lossy(a),
b,
c
);
}
assert_eq!(c, b, "source: {}", String::from_utf8_lossy(a));
Ok(())
}