[PDFBOX-3962] No unicode mapping / Text not extracting

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: Text extraction
• Assignee: Unassigned
• Reporter: Roman
• Created: 12/Oct/17 09:23
• Updated: 13/Oct/17 18:46
• Resolved: 13/Oct/17 18:46

Description

From the attached 72083_qdf.pdf file, this text (big letters on the top) is not extracted using PDFTextStripper:

AGGIE NIGHT
AT ENRON FIELD
FRIDAY, JUNE 15, 2001 at 7:05
HOUSTON ASTROS VS. TEXAS RANGERS

It does not work well in Acrobat Reader also. But, at the same time, it can be extracted properly by some PDF viewers.

Also, I found a workaround how to make it work, see it below.

1. Find this code block in LegacyPDFStreamEngine.java

        if(unicode == null) {
            if(!(font instanceof PDSimpleFont)) {
                return;
            }
            char c = (char)code;
            unicode = new String(new char[]{c});
        }

2. Insert this code block just before found one.

        if (unicode == null) {
            if (font instanceof PDType1CFont) {
                String name = ((PDType1CFont) font).codeToName(code);
                try {
                    Method method = PDType1CFont.class.getDeclaredMethod("readEncodingFromFont");
                    method.setAccessible(true);
                    Encoding encoding = (Encoding) method.invoke(font);
                    Integer newCode = encoding.getNameToCodeMap().get(name);
                    if (newCode != null && newCode.intValue() != 0) {
                        unicode = new String(new char[]{(char) newCode.byteValue()});
                    }
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }
            }
        }