PDF Placeholders with Other Delimiters: [[name]]

let mut success = false;

// 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 letter_template.pdf

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

// The letter reads: "Dear [[name]]," ... "expires on [[expiry]]" ... "[[amount]] per year" ... "[[agent]]".
let json = chilkat::JsonObject::new();
let _ = json.update_string("placeholderSyntax", "[[name]]");
let _ = json.update_string("placeholders.date", "October 18, 2026");
let _ = json.update_string("placeholders.name", "Ms. Rivera");
let _ = json.update_string("placeholders.expiry", "December 31, 2026");
let _ = json.update_string("placeholders.amount", "$299.00");
let _ = json.update_string("placeholders.agent", "Dana Whitfield, Account Manager");

let json_out = chilkat::JsonObject::new();
success = pdf.text_replace("apply", &json, &json_out).is_ok();
if !success {
    println!("Not applied: {}", json_out.emit().unwrap_or_default());
    if !success {
        println!("{}", pdf.last_error_text());
        return;
    }

}

let mut i = 0;
let count_i = json_out.size_of_array("replacements");
while i < count_i {
    json_out.set_i(i);
    println!("[[{}]] replaced", json_out.string_of("replacements[i].field").unwrap_or_default());
    i = i + 1;
}

if pdf.write_file("qa_output/letter_rivera.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

// Sample output:

// [[date]] replaced
// [[name]] replaced
// [[expiry]] replaced
// [[amount]] replaced
// [[agent]] replaced