There's a confusion between run direction and bidi processing with Arabic
shapping. RUN_DIRECTION_RTL and RUN_DIRECTION_LTR will show Arabic (and Latin)
correctly but the former will start the text from the right and the latter from
the left. The text will be correct in both cases, it's only a preference
depending on the audience.
Paulo
________________________________
From: Vahid Nasiri [mailto:vahid_nas...@yahoo.com]
Sent: Sunday, December 11, 2011 5:37 AM
To: Post all your questions about iText here
Subject: Re: [iText-questions] Fwd: Re: XMLWorker & RTL
Hello,
Thanks for your attention, but encoding = BaseFont.IDENTITY_H is mandatory for
RTL strings otherwise nothing will be displayed on the screen (just an empty
space) and PdfWriter.RUN_DIRECTION_RTL should be applied too to rotate
characters. Without PdfWriter.RUN_DIRECTION_RTL you will see "tac" instead of
"cat". So there is no choice here. It doesn't matter css direction:rtl is set
or not. Without BaseFont.IDENTITY_H and PdfWriter.RUN_DIRECTION_RTL, the result
will be nothing or some garbage for RTL data.
Best regards,
Vahid
________________________________
From: Balder VC <li...@redlab.be>
To: Post all your questions about iText here
<itext-questions@lists.sourceforge.net>
Sent: Saturday, December 10, 2011 5:20 PM
Subject: [iText-questions] Fwd: Re: XMLWorker & RTL
Seems my previous mail did not get through
-------- Original Message --------
Subject: Re: [iText-questions] XMLWorker & RTL
Date: Sat, 10 Dec 2011 14:30:35 +0100
From: Balder VC <li...@redlab.be><mailto:li...@redlab.be>
Organisation: redlab.be
To:
itext-questions@lists.sourceforge.net<mailto:itext-questions@lists.sourceforge.net>
Hi
Thanks for bringing that to attention. At the moment rtl is not supported.
I would not rely on a regex to determine the text direction after all perhaps
some one intend to display it in the other run direction?
I would opt for using CSS to set the run direction. Just like in html
{
direction:rtl;
}
the encoding should be settable in the same way, we can add an xmlworker
specific css property for that. Forcing .CP1252 is not a good idea, that's
right.
Thanks for the idea
ps: please don't hijack other threads, write a new message for a new topic, I
almost mist this mail.
On 8/12/2011 22:34, Vahid Nasiri wrote:
Hello,
In iTextSharp.tool.xml.css.apply.ChunkCssApplier class, String encoding is
hardcoded to BaseFont.CP1252.
It's easy to detect right to left languages data:
static readonly Regex MatchArabicHebrew = new
Regex(@"[\u0600-\u06FF,\u0590-\u05FF]+", RegexOptions.IgnoreCase |
RegexOptions.Compiled);
public static bool IsRtl(string data)
{
if (string.IsNullOrEmpty(data)) return false;
return MatchArabicHebrew.IsMatch(data);
}
And then we can improve Apply method of ChunkCssApplier class for instance:
public Chunk Apply(Chunk c, Tag t)
{
String fontName = null;
String encoding = BaseFont.CP1252;
if (IsRtl(c.Content)) encoding = BaseFont.IDENTITY_H;
Also run_direction should be set for PdfPCell and other similar elements to RTL.
Ex. iTextSharp.tool.xml.html.table.TableData class
public override IList<IElement> End(IWorkerContext ctx, Tag tag,
IList<IElement> currentContent) {
HtmlCell cell = new HtmlCell();
IList<IElement> l = new List<IElement>(1);
foreach (IElement e in currentContent) {
if(e is Chunk)
if (IsRtl(((Chunk)e).Content))
{
cell.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
}
--
twitter<http://twitter.com/redlabbe>
redlab-log<http://www.redlab.be/blog/>
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------------------------------------------------------------------------------
Learn Windows Azure Live! Tuesday, Dec 13, 2011
Microsoft is holding a special Learn Windows Azure training event for
developers. It will provide a great way to learn Windows Azure and what it
provides. You can attend the event by watching it streamed LIVE online.
Learn more at http://p.sf.net/sfu/ms-windowsazure
_______________________________________________
iText-questions mailing list
iText-questions@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
