pdftract/tests/debug_parse_content_edit.rs
jedarden d0f52751ce fix(pdftract-39gey): fix indent trigger to not split drop-cap paragraphs
The indent trigger was using .abs() which fired on both increased indent
(non-indented → indented) AND decreased indent (indented → non-indented).
This caused drop-cap style paragraphs (indented first line, flush-left
continuation) to incorrectly split into two blocks.

Per plan Phase 4.4 heuristic #2, indent change should only trigger when the
current line is MORE indented (to the right, larger x0) than the block
average - i.e., a new paragraph starting after non-indented text. It should
NOT trigger for decreased indent (first line indented, rest flush-left).

Fix: Remove .abs() and only check if line_x0 - block_avg_x0 > threshold.

Tests:
- test_indented_first_line_new_block: PASS (non-indented → indented splits)
- test_indented_first_line_of_paragraph_not_split: PASS (drop cap stays together)
- All 179 line module tests: PASS
2026-06-07 13:43:19 -04:00

48 lines
1.7 KiB
Rust

// Debug test to see why fixtures return 0 pages
use pdftract_core::document::parse_pdf_file;
use pdftract_core::parser::stream::FileSource as ParserFileSource;
use pdftract_core::parser::xref::find_startxref;
use pdftract_core::parser::xref::load_xref_with_prev_chain;
use pdftract_core::parser::xref::XrefResolver;
use pdftract_core::parser::catalog::parse_catalog;
use pdftract_core::parser::pages::flatten_page_tree;
fn main() {
let v1_path = "tests/fingerprint/fixtures/content_edit_one_glyph/v1.pdf";
println!("Parsing: {}", v1_path);
// Open and check startxref
let source = ParserFileSource::open(std::path::Path::new(v1_path)).unwrap();
let startxref = find_startxref(&source).unwrap();
println!("startxref: {}", startxref);
// Load xref
let xref_section = load_xref_with_prev_chain(&source, startxref);
println!("xref loaded, objects: {}", xref_section.objects.len());
// Get root ref
let root_ref = xref_section.trailer.as_ref()
.and_then(|t| t.get("Root"))
.and_then(|obj| obj.as_ref());
println!("Root ref: {:?}", root_ref);
// Create resolver
let resolver = XrefResolver::from_section(xref_section.clone());
// Parse catalog
let catalog = parse_catalog(&resolver, root_ref.unwrap(), Some(&source as &dyn pdftract_core::parser::stream::PdfSource));
println!("Catalog parsed: {:?}", catalog.is_ok());
if let Ok(cat) = &catalog {
println!(" pages_ref: {:?}", cat.pages_ref);
}
// Flatten page tree
if let Ok(cat) = catalog {
let pages = flatten_page_tree(&resolver, cat.pages_ref);
println!("Page tree result: {:?}", pages);
if let Ok(p) = &pages {
println!(" Pages count: {}", p.len());
}
}
}