You'll need to parse the field's /DA (default appearance) string:
for (Iterator i = fields.keySet().iterator(); i.hasNext();)
{
key = (String) i.next();
AcroFields.Item fldItem = (AcroFields.Item)fields.get( key );
PdfDictionary merged = fldItem.getMerged( 0 );
PdfString defaultApp = merged.getAsString( PdfName.DA );
String appStr = defaultApp.toString();
...
}
The string will look something like "/Helv 10 Tf 0 0 0 rg". PDF content is
written in "reverse polish notation". You want the second parameter for the
"Tf" command, which will be a number. Tf: text font. 1st param: font name,
2nd param: font size. So in this case, the font size is 10pt.
Note that there's no particular requirement to the order in which these
operators are present, and other operators are permitted as well.
The font size can be a float, it doesn't have to be a whole number. It can
also be ZERO, indicating that the viewer should render the text it will all be
displayed within the field's borders (within reason, it won't go below 4pt).
At that point, the only way to know the actual font size being used is to parse
the field's appearance stream. WHich isn't all that much harder. It really
boils down to solving the same parsing problem, getting the string to parse is
a tad more involved (and may be entirely abscent in the case of "half baked"
forms, forms with the "NeedAppearances" flag set).
--Mark Storer
Senior Software Engineer
Cardiff.com
#include <disclaimer>
typedef std::Disclaimer<Cardiff> DisCard;
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Wednesday, November 18, 2009 3:27 AM
To: [email protected]
Subject: [iText-questions] Font size from a text box
Hi,
I am reading the form fields from the PDF using Acrofields. I would like to get
the value and font size of the Text fields. I am getting the value of using
form.getField(key). How do I get the fontsize of the text field?
Your inputs will be highly appreciated.
Coder Snippet::
PdfReader reader = new PdfReader("c:\\register_form2.pdf");
AcroFields form = reader.getAcroFields();
HashMap fields = form.getFields();
String key;
for (Iterator i = fields.keySet().iterator(); i.hasNext();)
{
key = (String) i.next();
switch (form.getFieldType(key))
{
case AcroFields.FIELD_TYPE_TEXT:
System.out.println("Text");
System.out.println("Value is" + form.getField(key));
break;
default:
System.out.println("othes");
}
}
With thanks and regards,
S.K.Ramachandran
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