Am 03.03.2019 um 14:46 schrieb Christopher Schultz:
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Tilman,
On 3/2/19 10:00, Tilman Hausherr wrote:
Am 02.03.2019 um 15:54 schrieb Christopher Schultz:
Is there a good way to probe text to determine whether or not an
alternate font will be necessary and only load/bundle it then?
From the new EmbeddedMultipleFonts.java example (in the source
code download):
boolean isWinAnsiEncoding(int unicode) { String name =
GlyphList.getAdobeGlyphList().codePointToName(unicode); if
(".notdef".equals(name)) { return false; } return
WinAnsiEncoding.INSTANCE.contains(name); }
When that one returns true, you can use the built-in fonts.
Okay, I see that. Is there any reason not to do this?
boolean isWinAnsiEncoding(int unicode)
{
return WinAnsiEncoding.INSTANCE.contains(unicode);
}
?
I haven't tried because the numbers are not unicode. Some match, some
don't. These "codes" are the codes used in the PDF.
Is there nothing like PDFont.isSupportedCodePoint(unicode) available?
No. I agree that it is sortof annoying the way it is done now, but for
some reason it hasn't been improved. Maybe because each of the font
types has a different approach to find out whether it works... until
then, catching IllegalArgumentException is the way to go.
Did you get your application to work, or should PDFBox be redesigned first?
I didn't see anything. It looks more like the standard way to check is t
o:
try {
page.showText(text);
} catch (IllegalArgumentException iae) {
page.setFont(alternateFont);
page.showText(text);
}
You can also call encode instead, as done in the example.
If that's SOP, then maybe there is no real reason to bother checking
whether the String will work in the first place... just try it and try
again if the operation fails?
Catching IllegalArgumentException seems ugly, though. Maybe PDFBox
could subclass IllegalArgumentException with something more narrow
like IllegalCodePointException and throw that instead? It would be
backward-compatible and also one could determine the root cause
without parsing the exception message to see what the problem was.
IIRC it's always that cause if it throws.
Tilman
I'm happy to provide a patch.
- -chris
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