Rust Requires Chilkat v11.7.0+

Extract One Section of a PDF by its Heading

See more PDF Text Extraction Examples

Demonstrates "labelValue": "section", which returns everything from a heading up to the next heading of the same or higher level. With the "markdown" operation the section keeps its own sub-headings. Rust

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// The PDF used in this example is available at sectioned_doc.pdf

let pdf = chilkat::Pdf::new();
if pdf.load_file("qa_data/pdf/sectioned_doc.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

let json = chilkat::JsonObject::new();
let json_out = chilkat::JsonObject::new();

// The document has the sections Introduction, Opening Hours, Terms and Conditions (with the
// sub-sections Admission, Safety and Liability) and Contact.  Get the Terms and Conditions:
// everything after that heading up to the next heading of the same level (Contact).  The heading
// itself is not part of the value; labelMatches[0].label has it.
let _ = json.update_string("label", "Terms and Conditions");
let _ = json.update_string("labelValue", "section");

if pdf.extract_text("markdown", &json, &json_out).is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("{}", json_out.string_of("markdown").unwrap_or_default());

// The same with the "text" operation gives the section as plain text.
if pdf.extract_text("text", &json, &json_out).is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("---- as text ----");
println!("{}", json_out.string_of("text").unwrap_or_default());

// Sample output:

// ### Admission
// 
// Admission is free. Groups of more than ten should book in advance so that a volunteer can be assigned to them.
// 
// ### Safety
// 
// No more than eight people may be on the stair at one time. Children under twelve must be accompanied by an adult, and the lantern room is closed in high winds.
// 
// ### Liability
// 
// Visitors climb the tower at their own risk. The society carries public liability insurance but accepts no responsibility for personal property.
// ---- as text ----
// Admission
// 
// Admission is free. Groups of more than ten should book in advance so that a volunteer can be assigned to them.
// 
// Safety
// 
// No more than eight people may be on the stair at one time. Children under twelve must be accompanied by an adult, and the lantern room is closed in high winds.
// 
// Liability
// 
// Visitors climb the tower at their own risk. The society carries public liability insurance but accepts no responsibility for personal property.