C++ Requires Chilkat v11.7.0+

Extract Right-to-Left (Hebrew, Arabic) Text in Logical Order

See more PDF Text Extraction Examples

Demonstrates the "bidi" clean-up option. PDFs draw right-to-left text in visual order (the order of the glyphs on the page); by default the extracted text is reordered into logical order, so that it reads and compares correctly. Set "bidi" to false to get the glyphs in the order they are drawn. C++

#include <CkPdf.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool 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 hebrew_line.pdf

    CkPdf pdf;
    success = pdf.LoadFile("qa_data/pdf/hebrew_line.pdf");
    if (success == false) {
        std::cout << pdf.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject json;
    CkJsonObject jsonOut;

    //  The page has a line of Hebrew with a Latin word (PDF) and a number (2026) embedded in it.
    //  In logical order the line reads: kovetz PDF mishnat 2026 muchan ("the PDF file from 2026 is ready"),
    //  with the Hebrew words in reading order and "PDF" and "2026" kept left to right.
    success = pdf.ExtractText("text",json,jsonOut);
    if (success == false) {
        std::cout << pdf.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "---- default (bidi: true, logical order) ----" << "\r\n";
    std::cout << jsonOut.stringOf("text") << "\r\n";

    //  Without reordering, the Hebrew words come out reversed and in the opposite order, as drawn.
    json.UpdateBool("bidi",false);
    success = pdf.ExtractText("text",json,jsonOut);
    if (success == false) {
        std::cout << pdf.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "---- bidi: false (as drawn) ----" << "\r\n";
    std::cout << jsonOut.stringOf("text") << "\r\n";

    //  Sample output (the Hebrew is shown here transliterated):

    //  ---- default (bidi: true, logical order) ----
    //  Right-to-Left Text
    //  
    //  The line below is Hebrew with a Latin word and a number embedded in it:
    //  
    //  kovetz PDF mishnat 2026 muchan
    //  ---- bidi: false (as drawn) ----
    //  Right-to-Left Text
    //  
    //  The line below is Hebrew with a Latin word and a number embedded in it:
    //  
    //  nachum 2026 tanshim PDF ztevok    (the words in reverse order, each Hebrew word with its letters reversed)
    }