Swift 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. Swift

func chilkatTest() {
    var success: Bool = 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 sectioned_doc.pdf

    let pdf = CkoPdf()!
    success = pdf.loadFile(filePath: "qa_data/pdf/sectioned_doc.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    let json = CkoJsonObject()!
    let jsonOut = CkoJsonObject()!

    //  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.
    json.updateString(jsonPath: "label", value: "Terms and Conditions")
    json.updateString(jsonPath: "labelValue", value: "section")

    success = pdf.extractText(op: "markdown", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("\(jsonOut.string(of: "markdown")!)")

    //  The same with the "text" operation gives the section as plain text.
    success = pdf.extractText(op: "text", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("---- as text ----")
    print("\(jsonOut.string(of: "text")!)")

    //  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.

}