THausherr commented on PR #203:
URL: https://github.com/apache/pdfbox/pull/203#issuecomment-2691116655
This test passes:
```
@Test
void testEmbeddedFontWithZeroWidthChars() throws IOException
{
String text = "AAA\u200CBBB";
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int code;
try (PDDocument document = new PDDocument())
{
PDPage page = new PDPage();
document.addPage(page);
InputStream input = PDFont.class.getResourceAsStream(
"/org/apache/pdfbox/resources/ttf/LiberationSans-Regular.ttf");
PDType0Font font = PDType0Font.load(document, input);
byte[] encoded = font.encode('\u200C');
assertEquals(2, encoded.length);
code = ((encoded[0] & 0xFF) << 8) | (encoded[1] & 0xFF);
try (PDPageContentStream stream = new PDPageContentStream(document,
page))
{
stream.beginText();
stream.setFont(font, 20);
stream.newLineAtOffset(50, 600);
stream.showText(text);
stream.endText();
}
document.save(baos);
}
try (PDDocument document = Loader.loadPDF(baos.toByteArray()))
{
// verify that the text still contains zero-width characters
PDFTextStripper stripper = new PDFTextStripper();
String extractedText = stripper.getText(document);
assertEquals(text, extractedText.trim());
// verify that the zero-width characters are invisible
PDPage page = document.getPage(0);
PDResources resources = page.getResources();
Iterable< COSName > fontNames = resources.getFontNames();
COSName fontName = fontNames.iterator().next();
PDType0Font font = (PDType0Font) resources.getFont(fontName);
assertEquals(0, font.getWidth(code));
assertEquals(0, font.getWidthFromFont(code));
assertTrue(font.getPath(code).getBounds2D().isEmpty());
}
}
```
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