Just to inform you all that i did some research and found out the problem and
a solution:
The primary problem in this case is the fact that commas, spaces, and
numbers are all language-neutral. By default, these chars are interpreted
as language-neutral character as being the same language as the text
directly preceding the character.
So, in this case, because all of the characters in the string ", 2001" are
language-neutral, they are interpreted as being the same language as the
text preceding, which is Arabic. Thus, they are displayed as Arabic
characters (numbers run left-to-right even in the middle of a right-to-left
paragraph in Arabic).
THE SOLUTION:
Split the mix language string into substring containing text with LTR and
RTL run directions and then add the Unicode Left-to-Right mark character
'\u200E' to each RTL substring.
David
dayvidpow wrote:
>
> I modified the code to call
> columnText.setRunDirection(PdfWriter_DIRECTION_LTR)
> and now the mix english and arabic text is displaying somewhat correctly.
> However
> in some cases the mix english and arabic text is still not being displayed
> properly.
> Especially when there are special chars and numbers involved (e.g. '(' ,
> ')').
>
> For example for the following mix english and arabic text string:
> 'Source: Journal Title, Vol. 0, No. 21, The Lyrical Phenomenon/
> <some_arabic_text>, (2001) , pp. 128-160'
>
> For some strange reason the mix text is outputted to the PDF as:
> 'Source: Journal Title, Vol. 0, No. 21, The Lyrical Phenomenon/ 2001)
> <some_arabic_text>), pp. 128-160'
>
> That is the (2001) is not getting displayed correctly as it appeared in
> the original text string. Do anyone knows how to prevent this from
> happening ?
>
> See my code snippet below:
> Paragraph para = new Paragraph();
> para.add(new Phrase("Source: ", unicodeFont));
> para.add(new Phrase(mixEnglishArabicSourceStr, unicodeItalicFont));
> para.setAlignment(Element.ALIGN_LEFT);
> columnText.setRunDirection(PdfWriter.RUN_DIRECTION_LTR) ;
> columnText.addText(para);
> columnText.go()
>
> David
>
>
>
> Paulo Soares wrote:
>>
>> You must call columnText.setRunDirection(PdfWriter.RUN_DIRECTION_RTL) or
>> columnText.setRunDirection(PdfWriter.RUN_DIRECTION_LTR).
>>
>> Paulo
>>
>>> -----Original Message-----
>>> From: [EMAIL PROTECTED]
>>> [mailto:[EMAIL PROTECTED] On
>>> Behalf Of dayvidpow
>>> Sent: Wednesday, December 05, 2007 3:08 PM
>>> To: [email protected]
>>> Subject: Re: [iText-questions] Phrase containing
>>> Chunks/Phrase with multiple Run Directions
>>>
>>>
>>> As suggested, I added all the English and Arabic text to a
>>> Paragraph and then
>>> set
>>> the alignment to Element.ALIGN_LEFT (see code sample below).
>>> However, the
>>> mix English and Arabic text output on the same line is still
>>> not correct.
>>> The Arabic
>>> text is not getting rendered correctly.
>>>
>>> I believe the problem is that English has a run direction of
>>> Left-to-Right
>>> and Arabic text
>>> has a run direction of Right-to-Left, but there is no way of
>>> specifying this
>>> for each
>>> piece of Arabic or English text added to the Paragraph.
>>>
>>> Am I missing something here ?
>>>
>>> Paragraph para = new Paragraph();
>>> para.add(new Phrase("Author(s): ", unicodeFont));
>>> para.add(new Phrase(english_author_name_str1+"/ ",
>>> unicodeItalicFont));
>>> para.add(new Phrase(arabic_author_name_str1+", ",
>>> unicodeItalicFont));
>>> ....
>>> para.add(new Phrase(english_author_name_strN+"/ ",
>>> unicodeItalicFont));
>>> para.add(new Phrase(arabic_author_name_strN+", ",
>>> unicodeItalicFont));
>>> para.setAlignment(Element.ALIGN_LEFT);
>>> columnText.addText(para);
>>> columnText.go()
>>>
>>>
>>> David
>>>
>>>
>>>
>>> Paulo Soares wrote:
>>> >
>>> > You can mix English and Arabic text in the same line and
>>> both will work
>>> > correctly. You may use the alignment LTR. Both texts must
>>> be in the same
>>> > Paragraph.
>>> >
>>> > Paulo
>>> >
>>> >> -----Original Message-----
>>> >> From: [EMAIL PROTECTED]
>>> >> [mailto:[EMAIL PROTECTED] On
>>> >> Behalf Of dayvidpow
>>> >> Sent: Wednesday, December 05, 2007 1:25 AM
>>> >> To: [email protected]
>>> >> Subject: Re: [iText-questions] Phrase containing
>>> >> Chunks/Phrase with multiple Run Directions
>>> >>
>>> >>
>>> >> The proposed 2 column solution will not work for my
>>> special situation.
>>> >> Basically, I am reading some journal metadata from xml files
>>> >> and using this
>>> >> data to generate and insert a coverpage into existing PDFs.
>>> >>
>>> >> The journal metadata is of varying length and in various languages.
>>> >> Some of the metadata contains text in 2 different languages with
>>> >> 2 different RUN DIRECTION eg. English and Arabic or English
>>> >> and Hebrew.
>>> >> So for example: a journal article may have multiple authors -
>>> >> some with English names and some with Arabic names. So the
>>> >> output should be:
>>> >>
>>> >> Title: <english_article_title> / <arabic_article_title>
>>> >> Author(s): <englishname>, <english_name>, <arabic_name>,
>>> >> <arabic_name>...<arabic_name>
>>> >>
>>> >> Now in these special cases i am trying to output the English
>>> >> portion of the
>>> >> text
>>> >> and the Arabic portion of the text together on the same
>>> line with auto
>>> >> wrapping
>>> >> and in the proper order. The data varies in length therefore
>>> >> i cannot use
>>> >> absolute
>>> >> positioning (showTextAligned, PdfPTable, etc).
>>> >>
>>> >> I don;t know , but maybe this cannot be accomplished using iText ?
>>> >>
>>> >> David
>>> >>
>>> >>
>>> >> Paulo Soares wrote:
>>> >> >
>>> >> > I think that what you require are different alignments in
>>> >> the same line.
>>> >> > It's possible to achieve that with a PdfPTable with two
>>> >> columns without
>>> >> > borders, one left aligned and the other right aligned, both
>>> >> with no wrap
>>> >> > set.
>>> >> >
>>> >> > Paulo
>>> >> >
>>> >> >> -----Original Message-----
>>> >> >> From: [EMAIL PROTECTED]
>>> >> >> [mailto:[EMAIL PROTECTED] On
>>> >> >> Behalf Of dayvidpow
>>> >> >> Sent: Monday, December 03, 2007 6:31 PM
>>> >> >> To: [email protected]
>>> >> >> Subject: [iText-questions] Phrase containing Chunks/Phrase
>>> >> >> with multiple Run Directions
>>> >> >>
>>> >> >>
>>> >> >> Currently, in iText I can create a new Phrase object with a
>>> >> >> main font and
>>> >> >> then within the Phrase I can have additional Chunks or
>>> Phrases with
>>> >> >> different fonts. Therefore, likewise would it be possible
>>> >> to create a
>>> >> >> Phrase with a main run direction and then add additional
>>> >> >> Chunks or Phrases
>>> >> >> to it with different run directions ?
>>> >> >>
>>> >> >> I know that iText does not currently support thism, but I am
>>> >> >> just looking at
>>> >> >> how i can possibly extend the Phrase class to meet a special
>>> >> >> need, Which is
>>> >> >> to output some text in left-to-right and right-to-left
>>> >> >> language on the same
>>> >> >> line using ColumnText.go() method, instead of
>>> >> >> ColumnText.showTextAligned
>>> >> >> (which requires absolute positioning).
>>> >> >>
>>> >> >> Can the Phrase class be extended in this way ?
>>
>>
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>>
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