Rust Requires Chilkat v11.7.0+

Get the Text Block Below a PDF Caption

See more PDF Text Extraction Examples

Demonstrates the "label" option with labelValue "below", which captures the block of text directly under a caption such as "Ship To", ending at the next gap or heading. Combined with layout "lines", the lines of an address block are kept separate. Rust

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

// The packing slip used in this example is available at packing_slip.pdf

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

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

// The packing slip has the captions "Bill To" and "Ship To" side by side,
// each with an address block below it.
let _ = json.update_string("label", "Ship To");

// "below" means the value is the block of text directly under the label.
let _ = json.update_string("labelValue", "below");

// With the default "flow" layout the lines of the block would be joined into one paragraph.
// "lines" keeps each line of the address on its own line.
let _ = json.update_string("layout", "lines");

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

println!("Ship To:");
println!("{}", json_out.string_of("text").unwrap_or_default());
println!("");

let _ = json.update_string("label", "Bill To");
if pdf.extract_text("text", &json, &json_out).is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("Bill To:");
println!("{}", json_out.string_of("text").unwrap_or_default());
println!("");

// A caption over a short paragraph works the same way.  Here the flow layout is better,
// because the two lines are one piece of text.
let _ = json.update_string("label", "Special Instructions");
let _ = json.update_string("layout", "flow");
if pdf.extract_text("text", &json, &json_out).is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("Special Instructions:");
println!("{}", json_out.string_of("text").unwrap_or_default());

// Sample output:

// Ship To:
// Frank Delgado
// c/o Harbor Pet Boarding
// 9 Ferry Lane
// Portside, WA 98001
// 
// Bill To:
// Frank Delgado
// Apartment 3B
// 41 Mill Street
// Portside, WA 98000
// 
// Special Instructions:
// Leave the carton with the boarding office if no one answers. Do not leave it outside; the cat tree is not packed for rain.